By Changing Electrical Characteristic Of Motor Or Motor Circuit Patents (Class 417/45)
  • Patent number: 10784809
    Abstract: Controllability of a linear motor or a compressor is improved. There is provided a linear motor system that includes: an armature having magnetic poles and winding wires; a mover having a permanent magnet; and a power conversion unit that outputs AC power to the winding wires, in which the mover and the armature are relatively movable, and the mover or the armature is connected to an elastic body. The linear motor system further includes: a position detection unit that detects and outputs the position of the mover with respect to the armature, a position estimation, or a current detection unit that outputs the value of current flowing through the winding wires; and a control unit that controls the output of the power conversion unit on the basis of the output of the position detection unit, the output of the position estimation unit, or the output of the current detection unit.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: September 22, 2020
    Assignee: Hitachi, Ltd.
    Inventors: Takahiro Suzuki, Shuhei Nagata, Wataru Hatsuse, Masaki Koyama
  • Patent number: 10619640
    Abstract: A centrifugal pump assembly (2) includes an impeller, an electric drive motor (4), driving the impeller (12), and a back-flow channel (24), forming a flow connection from a delivery side (18) to a suction side (16). A valve (26), in a pressure-dependent manner, closes the flow connection. A control device (28) adjusts/sets the speed (n) of the drive motor (4), and is configured with a venting function for venting the centrifugal pump assembly (2) on operation. According to the venting function, after the detection of an air accumulation, the speed (n) of the drive motor (4) is automatically reduced, and subsequently the speed (n) is rapidly increased again. A method is also provided for removing an air accumulation from a centrifugal pump assembly during operation, which method includes reducing the speed (n) of the centrifugal pump assembly and subsequently rapidly increasing the speed (n) of the centrifugal pump again.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: April 14, 2020
    Assignee: GRUNDFOS HOLDING A/S
    Inventor: Christian Madsen
  • Patent number: 10498278
    Abstract: A motor controller includes: a rotation speed estimating unit that estimates a rotation speed of a motor on the basis of current information and primary frequency information of the motor; a proximity switch that outputs an ON signal when a portion of a rotating body of the motor is in proximity and outputs an OFF signal when a portion of the rotating body of the motor is not in proximity; a rotation speed computing unit that computes a rotation speed of the motor on the basis of the ON signal and the OFF signal; and a state determining unit that determines whether a present state is a speed attainment state and whether a present state is a speed zero state on the basis of a rotation speed estimation value estimated by the rotation speed estimating unit and a rotation speed computation value computed by the rotation speed computing unit.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: December 3, 2019
    Assignee: FANUC CORPORATION
    Inventors: Shoutarou Hashimoto, Yuuki Morita
  • Patent number: 10465676
    Abstract: A pumping system and method including a flow locking feature. A pump controller includes a user interface configured to initially receive and set a plurality of programmed flow rate settings, a maximum locked flow rate, and a minimum locked flow rate. The pump controller is also configured to disable resetting of the maximum flow rate and the minimum flow rate once they are initially received and set and to allow resetting of the plurality of programmed flow rate settings throughout operation of the pumping system. The pump controller is further configured to operate a pump motor in order to maintain a first flow rate set by one of the plurality of programmed flow rate settings as long as the first flow rate is between the minimum locked flow rate and the maximum locked flow rate.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: November 5, 2019
    Assignee: Pentair Water Pool and Spa, Inc.
    Inventors: Ronald B. Robol, Daniel J. Hruby, Rodney McCall
  • Patent number: 10408210
    Abstract: A control method of a driving circuit is provided for controlling a piezoelectric actuator of a piezoelectric pump to move a fluid of a fluid reservoir. Firstly, a driving voltage is outputted from the driving circuit. Then, a first inhalation adjusting process is implemented while the piezoelectric pump performs an inhaling operation. In the first inhalation adjusting process, a fluid pressure of the fluid within the fluid reservoir is detected and the fluid pressure is adjusted to the first predetermined inhalation pressure value according to the detecting result. Then, a first exhalation adjusting process is performed while the piezoelectric pump performs an exhaling operation. In the first exhalation adjusting process, the fluid pressure is detected and the fluid pressure is adjusted to the first predetermined exhalation pressure value according to the detecting result.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: September 10, 2019
    Assignee: MICROJET TECHNOLOGY CO., LTD.
    Inventors: Ying-Lun Chang, Shih-Chang Chen, Jia-Yu Liao
  • Patent number: 9995298
    Abstract: An apparatus and method for controlling a linear compressor and a linear compressor and a refrigerator having the same are provided. The apparatus may include a drive configured to drive the linear compressor based on a control signal, a detector configured to detect a motor current of the linear compressor, an asymmetric current generator configured to generate an asymmetric motor current by applying a current offset to the detected motor current, and a controller configured to generate the control signal based on the asymmetric motor current. The current offset may be changed based on a change in a position of a piston of the linear compressor.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: June 12, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Sungjin Lim, Daegeun Park, Youngwoong Song
  • Patent number: 9970433
    Abstract: Method for automatically controlling a pumping station of a fluid circulation system with flowrate control valves, comprising the following control steps which are cyclically repeated: (b) driving said pumping station in accordance with a set curve belonging to a group of predefined driving curves; (c) monitoring over time the variation in flowrate of fluid circulating in the system at the pumping station, or a parameter related thereto; (d) if, during the monitoring step (c), the variation in flowrate exceeds or falls below a control threshold and if said condition is maintained for a stabilization time, (e) modifying the set driving curve, replacing it with another curve from the plurality of driving curves; and (f) reinitializing the monitoring step (c) from a new working point reached by the pumping station.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: May 15, 2018
    Assignee: Taco Italia S.r.l.
    Inventor: Elio Marioni
  • Patent number: 9829226
    Abstract: An object of the present invention is to maintain a heating amount constant when a compressor is heated at the time of shutdown of the compressor, regardless of the influences of production tolerance and environment variations. An inverter control unit causes an inverter to generate a high-frequency AC voltage having a de-energized section in which a voltage applied from the inverter to a motor is zero between a section in which the voltage is positive and a section in which the voltage is negative. At this time, the inverter control unit detects a value of a current flowing to the inverter in a detection section residing from immediately before a start of the de-energized section to immediately after an end of the de-energized section, and causes the inverter to generate a high-frequency AC voltage adjusted according to the detected current value.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: November 28, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazunori Hatakeyama, Takuya Shimomugi, Shinya Matsushita, Shinsaku Kusube, Tsutomu Makino
  • Patent number: 9452250
    Abstract: A device for pumping blood in an extracorporeal circuit includes a centrifugal pump that suctions the blood to be pumped via a venous hose line connected to a suction side of the pump and releases it via an arterial hose line connected to a release side of the pump. The device includes a flow sensor that detects a released quantity on the release side of the pump and emits a measurement signal corresponding to the released quantity, a pressure sensor that detects the pressure on the release side of the pump and emits a measurement signal corresponding to the pressure, and an evaluation unit to which the measurement signals of the sensors are fed and which determines a value corresponding to the pressure on the suction side of the pump, taking into consideration the two measurements signals and the rotational speed of the centrifugal pump.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: September 27, 2016
    Assignee: Sorin Group Deutschland GmbH
    Inventors: Ottmar Penka, Johann Schreyer, Erwin Knott
  • Patent number: 9302130
    Abstract: A fire protection system is provided including spray nozzles a pump unit, a control system with pressure-measuring mechanism, and piping for conducting extinguishing medium from the pump unit to the spray nozzles. The pump unit includes pump drives, each of which comprises a pump and an AC electric motor. The AC motor can be connected to an AC electricity network via a contactor device, in which pump unit the AC electric motors are controlled on the basis of the pressure measured in the piping. One of the electric motors is controlled by means of a frequency converter such that the motor steplessly adjusts pressure and the others are started up into the network as steplessly adjusting motors.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: April 5, 2016
    Assignee: MARIOFF CORPORATION OY
    Inventors: Markku Aho, Vesa Kettunen, Pasi Pennanen
  • Patent number: 9291169
    Abstract: A fan motor control device includes a zero-crossing detection unit, a phase control unit, an operation processing unit, a first rectifier element and a second rectifier element. The zero-crossing unit generates a synchronization reference signal to the phase control unit, which in turn generates a phase control signal to the operation processing unit. According to the received phase control unit, the operation processing unit generates a motor-starting processing signal to the first and the second rectifier element for driving a fan motor to rotate. Since the phase control unit provides the effect of controlling the fan motor's output power and rotational speed, it enables the fan to have increased rotational speed and provide improved heat dissipation and ventilation effects.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: March 22, 2016
    Assignee: Asia Vital Components Co., Ltd.
    Inventors: Mao-Lin Chen, Chih-Chiang Chao
  • Patent number: 9225272
    Abstract: The present invention provides a control circuit for speed and rotational direction of a fan, including a signal conversion unit, a processing unit, and a drive unit. The signal conversion unit converts the received input signal into a DC level signal. The processing unit determines to generate a plurality of control signals for the fan based on the received DC level signal and at least one preset voltage therein to drive the drive unit, further controlling the rotational speed or clockwise/counter-clockwise rotation of the fan, whereby to reduce the cost and increase the layout space.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: December 29, 2015
    Assignee: ASIA VITAL COMPONENTS CO., LTD.
    Inventors: Wei-Fu Wu, Wei-Tsai Huang
  • Patent number: 9217426
    Abstract: A pump has an inlet opening, an outlet opening, a pump diaphragm comprising an opening, provided with a passive check valve, through the pump diaphragm, and an actuator configured to move the pump diaphragm between a first position and a second position. The passive check valve is configured such that a movement from the first position in the direction toward the second position has a closing effect, and that a movement from the second position in the direction toward the first position has an opening effect, so that a pumping cycle wherein the pump diaphragm is moved from the first to the second positions, and back, causes a net flow from the inlet opening to the outlet opening.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: December 22, 2015
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.v.
    Inventors: Martin Wackerle, Juergen Kruckow, Martin Richter, Klaus Heinrich
  • Patent number: 9175677
    Abstract: A method for regulating a motor-driven pump of an SCR system, the pump delivering a pressure, being subjected to a hydraulic torque in relation to this pressure and also to a resistive torque and being driven by an electric motor including coils supplied with a current and developing a torque in relation to this current, according to which to regulate the pump, use is made of a mechanism to measure the current in the coils of the motor, of a regulator of overall current consumed by the motor, and of a model of the relation between the current and the pressure using an estimate of part of the resistive torque, namely the dry frictions, obtained by rotating the pump under no-load conditions at different speeds and by measuring the associated current.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: November 3, 2015
    Assignee: INERGY AUTOMOTIVE SYSTEMS RESEARCH (Societe Anonyme)
    Inventors: Jean-Claude Habumuremyi, Volodia Naydenov, Joel Op De Beeck
  • Publication number: 20150147191
    Abstract: A zero turn mower vehicle 10 includes left and right hydrostatic transmissions 11a, 11b driving wheels 15a, 15b. The transmissions 11a, 11b each include a swashplate type axial piston hydraulic pump 17 having a swashplate 22. A system 12 and method controls each pump 17. A controller 31 receives input signals and provides output signals to electric motors 33a, 33b to control each swashplate 22. Operator interface input devices 30a, 30b provide inputs to controller 31. Angle sensors 35a, 35b provide additional inputs to controller 31. Displacement amplifiers 36a, 36b amplify displacement of each swashplate 22, and torque amplifiers 34a, 34b amplify torque of electric motors 33a, 33b.
    Type: Application
    Filed: January 28, 2015
    Publication date: May 28, 2015
    Applicant: Parker-Hannifin Corporation
    Inventors: David Mark Heathcoat, JR., Jason Lee Emmette, Roger Paul Gray, Somer Renee Malone, Kirk Ayres Lola, Kerry Todd Brock, Eli Cutshall
  • Publication number: 20150139818
    Abstract: A motor-driven compressor includes a compression unit that includes movable and fixed scrolls and a compression chamber, an electric motor that includes a rotor and drives the compression unit, a motor drive circuit that drives the electric motor, an injection port that draws intermediate pressure refrigerant into the compression chamber, a controller that performs rotation control on the rotor, and a voltage detector that detects a terminal voltage of the electric motor. The compression unit compresses low pressure refrigerant drawn into the compression chamber to discharge high pressure refrigerant. The controller is configured to output a stop instruction to deactivate the rotation control of the rotor, determine a rotation condition of the rotor based on the voltage detected by the voltage detector after outputting the stop instruction, and perform, based on the determination, restart preparation control that includes outputting a lock instruction to electrically stop rotation of the rotor.
    Type: Application
    Filed: November 17, 2014
    Publication date: May 21, 2015
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventor: Yoshiki NAGATA
  • Publication number: 20150132149
    Abstract: An electric fan comprises a motor, a plurality of blades, a shroud and a control unit, wherein the motor is fixedly mounted to a rear net of the shroud; the blades are mounted inside the shroud, and are fixedly connected with the motor; the control unit comprises a capacitor, a switch and a power line; and the capacitor, the switch and the power line are electrically connected with the motor respectively. The control unit and the motor are connected integrally. The electric fan adopts a design of integrating the control unit and the motor, so that installation is simpler, and assembly efficiency is improved; and the fan is more compact in structure, and the space is saved.
    Type: Application
    Filed: February 20, 2014
    Publication date: May 14, 2015
    Applicant: Jiangmen Keye Electrical and Mechanical Manufacturing Co., Ltd.
    Inventor: GUANGLIAN LIN
  • Publication number: 20150125312
    Abstract: A pumping system for evacuating an enclosure comprises a pumping mechanism (30), a motor (32) for driving the pumping mechanism, and a controller (36) for controlling the motor. The controller sets a maximum value for a rotational frequency of the motor and a maximum value for a current in the motor, and, to optimise the performance of the pumping system, independently adjusts the maximum values during evacuation of the enclosure.
    Type: Application
    Filed: December 12, 2014
    Publication date: May 7, 2015
    Inventor: Simon Harold Bruce
  • Publication number: 20150093255
    Abstract: A method and arrangement are disclosed for operating a pump in pump system having a photovoltaic panel system, an inverter electrically connected to the photovoltaic panel system, and a motor driving the pump and electrically connected to the output of the inverter. The method can include setting a voltage limit for the inverter, monitoring the voltage produced by the photovoltaic panel system, operating the inverter for rotating of the motor when the voltage produced by the photovoltaic panel system is above the voltage limit, and disabling use of the inverter when the voltage of the photovoltaic system remains below the voltage limit.
    Type: Application
    Filed: September 26, 2014
    Publication date: April 2, 2015
    Applicant: ABB OY
    Inventors: Ahmed Syed, Chetan Patange, Deepak Pandey, Laxmikantha Shenoy, Mikko Lammi, Rahul Raj, Satyan Rn
  • Publication number: 20150093254
    Abstract: A motor-driven compressor includes a compression portion, an electric motor, a motor drive circuit having switching element, a temperature detector, and a switcher, which switches the drive mode of the motor drive circuit. When acquiring information indicating that the temperature detected by the temperature detector has increased and reached a first preset temperature, the switcher switches the drive mode of the motor drive circuit from a first drive mode to a second drive mode. Also, when acquiring information indicating that the temperature detected by the temperature detector has increased and reached a second preset temperature, which is higher than the first preset temperature, the switcher switches the drive mode of the motor drive circuit from the first drive mode or the second drive mode to a third drive mode.
    Type: Application
    Filed: September 26, 2014
    Publication date: April 2, 2015
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Hiroshi FUKASAKU, Yoshiki NAGATA
  • Publication number: 20150083649
    Abstract: A submersible pumping apparatus for displacing transmission fluid includes a pump operably coupled with a motor. A filter housing is attached to the pump and has a cavity with an inlet aperture extending to an exhaust port of the pump. A fluid filter is engaged with the cavity and has a filter cover with a relief valve disposed within an outlet aperture that extends from the cavity to an exit port on the filter cover. The relief valve is configured to open when a fluid pressure from the exit port reaches a threshold and close when the fluid pressure is below the threshold. A rotor cover is attached to the motor and has a circuit board for operating the motor, such that the rotor cover is configured to prevent the circuit board from being exposed to liquid.
    Type: Application
    Filed: September 19, 2014
    Publication date: March 26, 2015
    Inventor: Ryan David Rosinski
  • Patent number: 8985105
    Abstract: The present invention provides a gas delivery device and system and methods for delivering humidified pressurized gas through a conduit to a subject. The configuration of the elements of the gas delivery device enable the device to be conveniently oriented from a horizontal to vertical position to suit the needs of a user. The gas delivery device may incorporate a Helmholtz resonator for dampening sound of the motor. The conduit may incorporate concentric tubes to allow it to conveniently engage the humidifier at a single aperture. The invention includes a method of operating a blower motor for a gas delivery device using a single Hall sensor.
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: March 24, 2015
    Assignee: Compumedics Medical Innovation Pty Ltd
    Inventors: David Burton, Fred Blochlinger, Warwick Freeman, Grant Parratt, Allan Wallace
  • Patent number: 8974190
    Abstract: The compressor includes a sealed enclosure containing a compression stage, an electric motor having a stator and a rotor, an oil pump rotationally coupled to the rotor, including an oil inlet port connected to an oil sump, and control means arranged to command the operation of the motor in a start-up mode in which the rotor is rotated at a first speed of rotation included in a first speed range, and a normal operating mode in which the rotor is rotated at a second speed of rotation included in a second speed range higher than the first speed range. The compressor includes an oil injection device having an oil injection duct connected to a first oil outlet port of the oil pump and arranged to supply the compression stage with oil.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: March 10, 2015
    Assignee: Danfoss Commercial Compressors
    Inventors: Patrice Bonnefoi, Feifei Wang
  • Publication number: 20150056083
    Abstract: A system and method are provided for saving energy for an electric motor having periodic load variations by reducing the supply voltage to the motor during an open loop mode. The motor and system will speed up, allowing the natural kinetic energy of the cyclic motion to perform part of the pumping action. A closed loop controller computes information from the observed phase angle between the voltage and current supplied to the motor. By reducing the supply voltage to the motor, the observed phase angle may be reduced to a target phase angle value. By allowing some current flow, primarily of a reactive nature, an observable feedback parameter may be used in the closed loop control system as an indication of the load condition, to which the closed loop motor controller may react, supplying power when needed, such as in the energy consumption mode.
    Type: Application
    Filed: August 29, 2014
    Publication date: February 26, 2015
    Inventors: John L. Lumsden, Paul H. Kelley, Vasan Venkataraman
  • Publication number: 20150056082
    Abstract: A method of breaking a gas lock in an electrical submersible pump, comprising: a) monitoring a measured value related to the electrical current used by a pump motor connected to and providing power to the pump; b) comparing the measured value to a threshold value to detect the occurrence of gas lock conditions; and when those conditions are detected; c) sending an override signal to immediately reduce the flow to the pump for a set period of time; and d) comparing the measured value related to the electrical current to the threshold value at the end of the set period of time, and if gas lock conditions are not detected, then increasing the power to the pump.
    Type: Application
    Filed: February 27, 2013
    Publication date: February 26, 2015
    Inventors: Lissett Josefina Barrios, David Earl Hugg
  • Publication number: 20150052921
    Abstract: An embodiment of method used to control operation of a screw compressor of a refrigeration system may include receiving status signals regarding operation of the screw compressor of the refrigeration system. The method may further include determining an operating point of the screw compressor based upon the received status signals, and selecting a torque profile for the screw compressor based upon the operating point. The method may also include driving the screw compressor per the selected torque profile. Refrigeration systems and compressor systems suitable for implementing the method are also presented.
    Type: Application
    Filed: November 4, 2014
    Publication date: February 26, 2015
    Inventors: David M. Foye, Nathan T. West, Dennis M. Beekman, John R. Sauls
  • Publication number: 20150037171
    Abstract: A downhole electric submersible pump system includes a plurality of motors operatively coupled on a common shaft with an electric submersible pump and a downhole switch mechanism for providing an electrical circuit to each motor of the plurality of motors, wherein the downhole switch mechanism allows power to be delivered to at least one motor. A downhole switch mechanism located in a wellbore, the downhole switch mechanism including an electrical power input for receiving power from an electrical cable and at least two electrical power outputs connected to at least two motors operatively coupled with one or more electric submersible pumps, wherein the downhole switch mechanism is actuated from the surface via the electrical cable and allows power to be delivered to at least one motor of the at least two motors coupled with the one or more electric submersible pumps. A method is also provided.
    Type: Application
    Filed: August 1, 2014
    Publication date: February 5, 2015
    Applicant: Chevron U.S.A. Inc.
    Inventors: Yamila Antonieta Orrego, Gopikrishna Chava, Ben Partington, Jose A. Gamboa
  • Patent number: 8944777
    Abstract: The air-conditioning apparatus includes a coolant circuit configured by sequentially connecting a compressor, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger; a motor that operates a compressor mechanism disposed inside the compressor; an inverter for driving the motor; and a control unit that controls the inverter. The control unit includes a liquefaction detecting unit that detects coolant liquefaction in the compressor; includes a first PWM signal generating unit that generates an inverter control signal for driving the motor; includes a second PWM signal generating unit that generates an inverter control signal for making the motor perform a preheating operation; and includes a switching unit that performs switching in such a way that the first PWM signal generating unit or the second PWM signal generating unit outputs the corresponding inverter control signal to the inverter.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: February 3, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazunori Sakanobe, Kazunori Hatakeyama, Shinya Matsushita, Shinsaku Kusube, Tsutomu Makino
  • Publication number: 20150014099
    Abstract: The present invention relates to a control device for pressure control in a hydraulic system, especially of an elevator-system, the control device is adapted to control an output variable of an inverter supplying a hydraulic pump of the hydraulic system with electric energy, the output variable is adapted to adjust the speed of the hydraulic pump in order to at least partly compensate for a leakage of operating fluid in the hydraulic pump. Further, the invention relates to an elevator-system comprising a hydraulic pump, an inverter, and a control device which controls a supply of the hydraulic pump with electric energy from the inverter.
    Type: Application
    Filed: January 23, 2013
    Publication date: January 15, 2015
    Applicant: Yaskawa Europe GMBH
    Inventors: Kutay Ferhat Celik, Philipp Kenneweg
  • Patent number: 8926333
    Abstract: A device for simulating blood flow including an anatomical unit and a waveform generator for generating waveforms. The waveform generator includes a pump capable of pumping a fluid through at least one fluid line and thereby transmitting the waveform from the waveform generator through the fluid line. The waveform generator further includes a bifurcation point capable of splitting the fluid line into additional fluid lines, where the fluid lines include a main line and a parallel line. Additionally, the waveform generator includes valves capable of at least partially occluding fluid flow. The device further includes a reservoir capable of housing the fluid, where the waveforms enter and exit the anatomical unit and the waveform generator through the fluid lines simulating blood flow.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 6, 2015
    Assignee: SIMNEXT, LLC
    Inventors: John Vozenilek, Thomas Cusack, Sabeen Admani, Eliot Bethke, Michael Regan
  • Publication number: 20140369855
    Abstract: A pump for exchange of fluid between an apparatus reservoir and a reserve reservoir. The pump may have an elongated tubular body with a central bore with a reservoir end portion, an inlet end portion and an intermediate barrel portion. A piston assembly with a driving piston with a stem member with nonmagnetic properties attached and the stem member has a tubular extension member attached with all in longitudinal axis alignment slidably positioned in the central bore to position the driving piston adjacent to an electromagnetic coil assembly that is positioned around the intermediate barrel portion and to position the tubular extension member for a reservoir end to extend outwardly at the reservoir end portion opening. An output tubular member with a pressure relief valve is attached to an output port in a side wall of the reservoir end portion positioned for release of fluid through an output port.
    Type: Application
    Filed: June 14, 2013
    Publication date: December 18, 2014
    Inventors: Richard Nelson, Robert M. Nelson, Robert K. Dyas
  • Patent number: 8907789
    Abstract: A pump control system includes a controller coupled to first and second pressure sensors. The sensors couple serial pressure related information to the controller. The controller can evaluate respective liquid levels, in response to received pressure related information from the sensors. A current sensor coupled to the controller can provide signals indicative of operation of one or more pumps coupled to the controller. The controller includes circuits to detect the presence of predetermined faults and to emit an audible fault indicator in response thereto.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: December 9, 2014
    Assignee: Metropolitan Industries, Inc.
    Inventors: John R. Kochan, Jr., Casey W. Barker, Anton Belehradek
  • Patent number: 8858186
    Abstract: The present invention relates to a linear compressor, and more particularly, to a linear compressor which supplies a necessary cooling capacity through a natural cooling capacity modulation and a forcible cooling capacity modulation, and a cooling system using the same. The linear compressor according to the present invention includes a compression space into which refrigerant is sucked, a movable member which linearly reciprocates to compress the refrigerant sucked into the compression space, one or more springs which are installed to elastically support the movable member in a motion direction of the movable member, a motor unit which includes a motor and a capacitor connected in series to the motor so as to make the movable member linearly reciprocate, and a motor control unit which performs a natural cooling capacity modulation according to a load by reciprocation of the movable member.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: October 14, 2014
    Assignee: LG Electronics Inc.
    Inventors: Jong-Kwon Kim, Shin-Hyun Park, Kye-Lyong Kang, Hee-Dong Kang, Jeong-Uk Lee, Hyun Kim
  • Publication number: 20140271236
    Abstract: A fan driving circuit drives a first fan and a second fan which are connected in parallel and connected to an anode of a direct current power. The fan driving circuit includes a pulse width modulation signal generation module, a phase lock and delay module, a first pulse output comparator and a first capacitor. The width modulation signal generation module is connected between an external power and the first fan. The phase lock and delayed module is electrically connected to the pulse width modulation signal generation module. The first capacitor is connected between the DC and the ground. The first fan is supplied as normal by a PWM power supply, the second fan is powered by “shadow” and out-of-phase pulses taken from an inductor in the first fan and stored in the capacitor, to achieve a “two-for-one” power supply aspect, which saves power and reduces operational noise.
    Type: Application
    Filed: May 16, 2013
    Publication date: September 18, 2014
    Inventor: MING-TSE TAI
  • Publication number: 20140271234
    Abstract: Turbochargers are disclosed that have a braking system to brake the rotation of an electrically conductive compressor wheel within the turbocharger. The brake system includes the electrically conductive compressor wheel, which is connected to a turbine by a common shaft, one or more electromagnets positioned proximate to the compressor wheel, and a control circuit electrically coupled to the one or more electromagnets to turn the one or more electromagnets on or off to provide braking action to the compressor wheel. Systems including such a turbocharger and methods utilizing such turbochargers are also included herein.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: Dayco IP Holdings, LLC
    Inventors: Craig Markyvech, Brian Graichen, Stuart Kirby, Dave Fletcher
  • Publication number: 20140271235
    Abstract: Systems and methods of controlling the speed of a pump configured to move liquid through a pump system are described. The actual motor speed of the pump motor is controlled by adjusting a current applied to the motor based on the difference between the actual motor speed and the target motor speed according to a gain setting. A first gain value is applied as the gain setting when the difference between the actual motor speed and the target motor speed does not exceed a first threshold. However, a second, higher gain value is applied when the difference between the actual motor speed and the target motor speed exceeds the first threshold.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Inventor: Justin M. Magyar
  • Publication number: 20140271237
    Abstract: An estimating section detects a signal including counter electromotive voltage information of the motor, and estimating a magnetic pole electric angle and a rotational speed of the motor. A driving current controller repeats generation and cut-off of the driving current supplied from a power supply to the motor via the inverter circuit or regenerated from the motor to the power supply in a low-speed period between a stopped state and a predetermined rotational speed in an accelerating operation at a motor starting time or a decelerating operation at a motor stopping time. The estimating section detects the signal at the cut-off time so as to estimate the magnetic pole electric angle and the rotational speed in the low-speed period.
    Type: Application
    Filed: March 5, 2014
    Publication date: September 18, 2014
    Applicant: SHIMADZU CORPORATION
    Inventor: Junichiro KOZAKI
  • Patent number: 8834131
    Abstract: A motor controller for a motor-driven compressor includes a compressing body for compressing and discharging a refrigerant and a motor including a rotary shaft, the motor for driving the compressing body through the rotary shaft. A coil of the motor is arranged in a refrigerant containing area in the motor-driven compressor. The motor controller includes a determining section for determining whether liquid refrigerant is present in the refrigerant containing area and a modulation control section for driving the motor in accordance with three phase modulation control or two phase modulation control based on a determination result of the determining section.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: September 16, 2014
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Takashi Kawashima, Kazuki Najima, Fumihiro Kagawa, Motonobu Funato
  • Patent number: 8827656
    Abstract: Motor control apparatus for an electric oil pump includes the control command generating section configured to drive the motor control section by the first current command signal obtained from the fixed second target torque signal of the second signal generating section in a first stage, when the control command generating section receives the start command of the motor from the host control device when engine stops, to output the sum signal of the first current command signal and the second current command signal to the current control section, and to drive the motor control section by the third current command signal in a second stage, and to switch the output of the target torque switching section from the fixed second target torque signal to the first target torque signal of the first signal generating section in a third stage.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: September 9, 2014
    Assignees: JATCO Ltd, Nissan Motor Co., Ltd.
    Inventors: Yukihiro Sano, Ippei Suzuki, Yuukou Nojiri, Jyunichi Noda
  • Publication number: 20140227108
    Abstract: A variable-frequency motor device that runs on alternating current includes a first converting circuit, a second converting circuit, and a DC variable-frequency motor. An operation module is coupled to the variable-frequency motor device, and provides the alternating current to the first or second converting circuit. The first converting circuit receives the alternating current, and generates a first rotation-speed signal. The second converting circuit receives the alternating current, and generates a second rotation-speed signal. The DC variable-frequency motor is driven at a rotation speed according to the first or second rotation-speed signal.
    Type: Application
    Filed: July 18, 2013
    Publication date: August 14, 2014
    Applicant: DELTA ELECTRONICS, INC.
    Inventors: Hsin-Chih LIN, Lee-Long CHEN, Kun-Chou LEE
  • Publication number: 20140216081
    Abstract: Systems and methods are used to control operation of a rotary compressor of a refrigeration system to limit or prevent movement of rotors due to axial thrust loading resulting from rapid changes in speed of the rotors of the compressor. The operational profile of the motor is controlled to maintain acceleration torque and deceleration torque within predefined limits. The acceleration torque and deceleration torque are maintained within the predefined limits by controlling the speed of the motor, or by controlling the torque applied by the motor to the rotors during acceleration or deceleration.
    Type: Application
    Filed: January 30, 2014
    Publication date: August 7, 2014
    Applicant: Trane International Inc.
    Inventors: Nathan Thomas West, Dennis Myron Beekman, David Marshall Foye, Korwin Jay Anderson, Benjamin James Sykora
  • Publication number: 20140186191
    Abstract: To provide a hybrid type or battery type working machine which hardly gives a feeling of strangeness on an operation to an operator and in which electric power stored in a storage battery can be used effectively within an operation scheduled time set in advance. An amount of reduction in the amount of electricity stored in an electric storage device 60 in a predetermined time t1 after an working machine starts up is obtained, and an operation possible time t2 is obtained from the obtained amount of reduction and a residual amount of the electricity stored in the electric storage device 60. Further, determination is made as to whether the obtained operation possible time t2 reaches a remaining time of an operation scheduled time obtained by subtracting a currently spent real operation time from the operation schedule time set in advance.
    Type: Application
    Filed: January 31, 2012
    Publication date: July 3, 2014
    Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Masataka Sasaki, Takako Satake
  • Patent number: 8764409
    Abstract: An apparatus and method for controlling an operation of a compressor are disclosed to enhance a compressor efficiency in each operation mode in operating a compressor in a power mode or power saving mode according to an external load. The apparatus for controlling an operation of a compressor, including: a controller that generates a control signal to select an operation mode of the compressor according to an operation load of the compressor; a compressor motor that includes a main coil and a sub-coil and is driven in one of a plurality of operation modes according to a control signal of the controller; and a power supply unit that applies power via capacitors each having a different capacitance to the sub-coil of the compressor motor according to a control signal of the controller.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: July 1, 2014
    Assignee: LG Electronics Inc.
    Inventors: Jeong-Min Han, Sang-Myung Byun, Sang-Mo Kim
  • Publication number: 20140147289
    Abstract: A control circuit controls a fan to cool an integrated baseboard management controller (iBMC) in a server. The control circuit includes a state determination module. When the server is powered off and the iBMC is operating, the system power signal from a power supply unit (PSU) of the server is at a low level, the state signal from the iBMC is at a low level signal, the fan operates. When the server and the iBMC are powered off, the system power signal from the PSU is at a low level, and the state signal from the iBMC is at a high level, the fan is powered off. When the server is operating, the system power signal from the PSU is at a high level, the fan is powered off.
    Type: Application
    Filed: December 7, 2012
    Publication date: May 29, 2014
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: BO TIAN, KANG WU
  • Patent number: 8734120
    Abstract: A piston type compressor wherein the position of the piston highest pressure point is indicated and the rotor of the motor at the optimal starting angle aligned prior to the actual compression operation by providing a pre-pulse to rotate the rotor of the motor at least one full rotation at a certain frequency, during rotation measuring the load torque by the frequency converter as well as indicating the maximum load torque point and at the end aligning the rotor of the motor at the optimal starting angle of about 180° from the maximum pressure angle, and at the beginning of the actual compression operation setting the rotor position opposite to the maximum torque angle by feeding direct current to the stator winding and starting the motor by supplying maximum motor current to the motor to give the maximum torque and acceleration.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: May 27, 2014
    Assignee: Vacon Oyj
    Inventors: William Giewont, Todd Snider, Andreas Doktar
  • Publication number: 20140134000
    Abstract: A control circuit controls a fan to cool an integrated baseboard management controller (iBMC) in a server. The control circuit includes a state determination module. When the server is powered off and the iBMC is operating, the state determination module receives low level signals from a power supply unit (PSU) and the iBMC. The state determination module connects the PSU and the fan, such that the fan is operating. When the server and the iBMC are powered off, the state determination module receives a low level signal from the PSU and a high level signal from the iBMC. The state determination module disconnects the PSU from the fan, turning the fan off. When the server is operating, the state determination module receives a high level signal from the PSU. The state determination module disconnects the PSU from the fan, turning the fan off.
    Type: Application
    Filed: December 7, 2012
    Publication date: May 15, 2014
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
  • Publication number: 20140127035
    Abstract: Disclosed herein is a propulsion apparatus for ships. The propulsion apparatus, which includes a front propeller and a rear propeller to rotate in opposite directions and provides propulsion power to propel a hull of a ship, includes a power unit to supply power to rotate the rear propeller, a main shaft to transfer the power supplied from the power unit to the rear propeller, a hollow shaft extending in a longitudinal direction of the main shaft to allow the main shaft to pass therethrough and coupled to the front propeller, a drive motor including a rotor coupled to an outer circumferential surface of the hollow shaft and a stator supported by the hull, the drive motor rotating the hollow shaft in a direction opposite to a direction of rotation of the main shaft, and an electricity supply unit to supply electricity to the drive motor.
    Type: Application
    Filed: September 23, 2011
    Publication date: May 8, 2014
    Applicant: SAMSUNG HEAVY IND. CO., LTD.
    Inventors: Tae Goo Lee, Hyung Gil Park, Kwang Jun Paik, Dong Hyun Lee, Jin Suk Lee, Tetsuji Hoshino
  • Patent number: 8698447
    Abstract: A system and method are provided for reducing the energy consumed by a pump jack electric motor by reducing the supply voltage to the motor when the motor would be generating energy in open loop mode. By substantially eliminating the energy generation mode, the braking action of the utility grid in limiting the acceleration of the motor and system that would otherwise occur is substantially removed. The motor and system will speed up, allowing the natural kinetic energy of the cyclic motion to perform part of the pumping action.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: April 15, 2014
    Assignee: The Powerwise Group, Inc.
    Inventors: John L. Lumsden, Paul H. Kelley, Vasan Venkataraman
  • Patent number: 8698446
    Abstract: A system and method are disclosed for turning off the voltage to a pump jack electric motor during predetermined periods of time to save energy. In the method, the motor's response to closed-loop control may be evaluated over several pump strokes. The periods of the pump stroke when it is feasible to turn off the motor may be identified. The consistency of the measurements over several strokes may be evaluated. The motor may be turned off during predetermined periods on subsequent pump strokes when each pump stroke shows sufficiently similar behavior to that predicted during the closed-loop control process. The system may return to the closed-loop control process after a predetermined period of time to adjust to any changes in the system.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: April 15, 2014
    Assignee: The PowerWise Group, Inc.
    Inventor: Vasan Venkataraman
  • Patent number: 8690549
    Abstract: The invention relates to a centrifugal pump assembly with an electric drive motor and with a control device having a frequency converter, for the control of the rotational speed of the drive motor, wherein the control device is designed in a manner such that in at least one control region, a field weakening is produced in the drive motor, by way of which the rotational speed of the drive motor is increased.
    Type: Grant
    Filed: May 8, 2009
    Date of Patent: April 8, 2014
    Assignee: Grundfos Management a/s
    Inventors: Jan Caroe Aarestrup, Keld Folsach Rasmussen