Plural Diverse Conditions Or With Time Delay Patents (Class 318/365)
  • Patent number: 10833616
    Abstract: A power management system may include an energy source and a generator driven by a gas turbine engine to output generator power to a common bus. A source power converter is electrically coupled between the energy source and the common bus. A controller circuitry includes an adaptive filter to filter a power signal indicative of power consumption of a variable load on the common bus, and outputs a filtered signal as a load demand signal to the generator. A source demand error signal is also output to control the source power converter to supply power from the energy source to the common bus. The controller circuitry is further configured to automatically adjust the adaptive low pass filter in accordance with the power consumption of the dynamic load and the load demand signal of the generator.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: November 10, 2020
    Assignee: Rolls-Royce Marine North America Inc.
    Inventors: Donald Silverstein, Ainsmar Brown, Ivan Troitsky, James Greg Steinrock
  • Patent number: 9933034
    Abstract: A motor drive apparatus includes: a motor current detection unit; a brake release determination unit that determines that the brake is not released when the motor current detected when the motor is operated under a predetermined load by application of a voltage to a brake coil is larger than a current for when the brake is normally released; a brake coil voltage change unit that changes a voltage applied to the brake coil when it is determined that the brake is not released to a larger value; a change history storage unit that stores the voltage after being changed and change date and time; and a life prediction unit that calculates a predicted life of the brake apparatus based on the voltage after being changed and the change date and time and the previously stored failure-time brake coil voltage.
    Type: Grant
    Filed: October 10, 2016
    Date of Patent: April 3, 2018
    Inventors: Sou Saito, Tsutomu Shikagawa, Kiichi Inaba
  • Patent number: 8960671
    Abstract: A sheet conveying device includes a conveying path, a brushed motor, a motor drive unit, a conveying unit, a sensor, and a processor. The motor drive unit is configured to rotate and halt the brushed motor. The conveying unit is configured to convey a sheet along the conveying path by driving force of the motor. The sensor is configured to detect the sheet. The processor is configured to function as a halting unit configured to control the motor drive unit to halt the brushed motor in different methods depending on detection result of the sensor.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: February 24, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Tasuku Sugimoto
  • Patent number: 8922142
    Abstract: A motor controller for an electric motor having a stator and a rotor. The motor controller includes a power input for receiving AC power from a power source; a control input for receiving a control signal from a control; and circuitry for switching power from the power source to the electric motor in response to the control signal. The circuitry is operable to: apply a braking waveform to the stator while the rotor is rotating; monitor a reactive power of the stator; detect an increase in the reactive power of the stator to determine the rotor has substantially stopped rotating; and remove the braking waveform from the stator in response to detecting the increase in the reactive power.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: December 30, 2014
    Assignee: Nidec Motor Corporation
    Inventors: Darko Marcetic, Thomas J. Sheahan
  • Publication number: 20140167658
    Abstract: A system and a method of controlling a blower of a vehicle. The method includes detecting, by a controller, a turning of a key to an off position of the vehicle. In addition, the controller is configured to detect whether a high voltage DC-DC converter and a high voltage battery are normally operated in response to detecting the turning of the key to an off position. Regenerative energy generated by a regenerative brake operation of the blower is transmitted by the controller through two different paths based on whether the high voltage DC-DC converter and the high voltage battery are normally operated.
    Type: Application
    Filed: December 4, 2013
    Publication date: June 19, 2014
    Inventors: Soonwoo Kwon, Joon Yong Lee
  • Patent number: 8729836
    Abstract: A control device for a hoist, which enables easy judgment of the lifetime of a brake of a hoist is provided. The time setting unit sets the time from startup of a double winding induction motor to disengagement of the brake and the time from start of engagement of the brake to stopping of the double winding induction motor in accordance with the time from the startup of the double winding induction motor to generation of torque. The time changing unit detects if power-supply frequency of a power supply is 50 Hz or 60 Hz and can change at least one of the time from the startup of the double winding induction motor to the disengagement of the brake and the time from stopping of driving of the brake to stopping of double winding induction motor in accordance with the power-supply frequency of the power supply.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: May 20, 2014
    Assignee: Kito Corporation
    Inventors: Masaharu Maruno, Daisuke Matsuo, Kazuho Furukawa
  • Patent number: 8587230
    Abstract: A power tool includes a brushless DC motor housed inside a tool housing, an input unit, and a control unit. The motor includes a rotor, a stator, and at least one sensor positioned to sense a state of the rotational position of the rotor inside the stator. A control unit controls commutation of the motor through a series of power switches coupled to the power supply. The control unit receives a current sensor state from the sensor and a user-selected speed from the input unit and determines whether the motor has reversed direction using the user-selected speed and the current sensor state. The control unit disables commutation of the motor if the motor has reversed direction until a proper current sensor state is received from the sensor.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: November 19, 2013
    Assignee: Black & Decker Inc.
    Inventors: Pradeep M. Pant, James Goble
  • Patent number: 8587231
    Abstract: A power tool includes a housing, a brushless DC motor housed inside the housing, a power supply, a control unit, and an input unit such as a trigger switch actuated by a user. The control unit controls the commutation of the motor through a series of power switches coupled to the power supply. The control unit initiates electronic braking of the motor after occurrence of a condition in the input unit, such as trigger release or reduced speed, indicative of the power tool shut-down. A mechanism is provided to power the control unit for a predetermined amount of time after the detection of the condition from the input unit in order to complete the electronic braking of the motor.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: November 19, 2013
    Assignee: Black & Decker Inc.
    Inventor: Pradeep M. Pant
  • Patent number: 8299735
    Abstract: A fan system including a motor with a coil, a storage unit, a driver, and a buffer circuit is provided. The coil module has a first connection terminal and a second connection terminal. The storage unit electrically couples with a voltage source, stores electrical energy when the voltage source is available, and releases the stored electrical energy to carry out a brake operation when the voltage source is unavailable. The driver electrically couples with the first and second connection terminals of the coil module to control a direction of an inductor current passing through the coil module. The buffer circuit electrically couples with the coil module. In the brake operation, the buffer circuit operates to form a transient potential between the first and second connection terminals of the coil module and to consume electrical energy of the inductor current, for gradually stopping the motor in a buffering time period.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: October 30, 2012
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventors: Alex Horng, Tung-An Chen, Cheng-Nan Tsai, Kun-Tien Wu, Kuan-Yin Hou
  • Patent number: 7911164
    Abstract: A circuit installation that executes full voltage activation, division voltage operation, and delayed breaking brake to electric load by increasing the power to the load activated to promote its activation performance or reducing operation power in the course of operation by the load to save power consumption or limit operation performance of the load.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: March 22, 2011
    Inventor: Tai-Her Yang
  • Publication number: 20100301785
    Abstract: An electromagnetic braking system and method is provided for selectively braking a motor using an electromagnetic brake having an electromagnet, a permanent magnet, a rotor assembly, and a brake pad. The brake assembly applies when the electromagnet is de-energized and releases when the electromagnet is energized. When applied the permanent magnet moves the brake pad into frictional engagement with a housing, and when released the electromagnet cancels the flux of the permanent magnet to allow a leaf spring to move the brake pad away from the housing. A controller has a DC/DC converter for converting a main bus voltage to a lower braking voltage based on certain parameters. The converter utilizes pulse-width modulation (PWM) to regulate the braking voltage. A calibrated gap is defined between the brake pad and permanent magnet when the brake assembly is released, and may be dynamically modified via the controller.
    Type: Application
    Filed: May 29, 2009
    Publication date: December 2, 2010
    Applicants: GM GLOBAL TECHNOLOGY OPERATIONS, INC., The U.S.A. as Represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Donald R. Davis, Nicolaus A. Radford, Frank Noble Permenter, Adam H. Parsons
  • Patent number: 7839105
    Abstract: A circuit installation that executes full voltage activation, division voltage operation, and delayed breaking brake to electric load by increasing the power to the load activated to promote its activation performance or reducing operation power in the course of operation by the load to save power consumption or limit operation performance of the load.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: November 23, 2010
    Inventor: Tai-Her Yang
  • Patent number: 7723936
    Abstract: The invention relates to a method for controlled braking of an electrically powered lifting action in the event of a failure, such that at least one of the nominal values for “rotational direction” and/or “operating speed” and/or “door position” and/or “motor capacity” and/or “motor current” is ascertained and compared with an actual value, and such that a motorized braking process or motorized stopping process is triggered by a departure of the actual value from the nominal value that lies outside a predetermined range. In addition the invention relates to a device for applying said method.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: May 25, 2010
    Assignee: Feig Electronic GmbH
    Inventor: Dirk Schaefer
  • Patent number: 7615947
    Abstract: A motor driving device includes a brake mode control section for starting, when a brake instruction for a motor, braking of the motor in a reverse brake mode and then switching the reverse brake mode to a short brake mode; a cycle start detection section for receiving a rotation signal and detecting a start of a cycle of the rotation signal for each cycle; and a counter for performing, when the start of the cycle of the rotation signal is detected by the cycle start detection section, a count operation from an initial value. In the motor driving device, the brake mode control section detects that a value of the counter exceeds a threshold and performs switching from the reverse brake mode to the short brake mode with a delay from the detection.
    Type: Grant
    Filed: July 11, 2007
    Date of Patent: November 10, 2009
    Assignee: Panasonic Corporation
    Inventor: Shuji Tamaoka
  • Publication number: 20080018276
    Abstract: The invention relates to a switch for controlling the power to be fed to an electric motor of an electrical hand tool, which comprises a power supply connection, a motor connection, a controllable semiconductor connected between the motor connection and the power supply connection, a control circuit for controlling the semiconductor, and a safety circuit, wherein the switch comprises a cumulation circuit which is adapted to repeatedly measure a quantity prevailing in the switch or in its vicinity, assign a count value to the measured value of the quantity, cumulate the count values and generate a signal when the cumulated count value reaches a predetermined value. As a result of these measures the prior history of a component is included in the assessment of whether a situation is occurring which threatens the quality of this component.
    Type: Application
    Filed: July 13, 2007
    Publication date: January 24, 2008
    Applicant: Electrische Apparatenfabriek Capax B.V.
    Inventor: Heino Marten Burema
  • Patent number: 7088064
    Abstract: A method for the orientation of a spindle of a numerically controlled and rapidly rotating spindle by which the spindle is brought from an initial rotational speed into a predetermined position of rest. The method includes performing a first phase of orientation of the spindle by braking the spindle to a threshold rotational speed, wherein during the braking a switching over to a position controller is prepared, the switching over is performed at a switching time during a transition from the first phase of orientation to a second phase of orientation, the switching over is continuous in regard to position and/or rotational speed, and wherein a rotational speed of the spindle drops strictly monotonically.
    Type: Grant
    Filed: February 10, 2004
    Date of Patent: August 8, 2006
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventors: Michael Brakelmann, Matthias Fauser
  • Patent number: 7042177
    Abstract: System for braking either linear or rotary electric motor having no permanent magnets comprising at least one servo amplifier and an electronic circuit for generating a pulsed control signal for controlling the braking of the motor. The electronic circuit of the present invention may be responsive to any emergency such as loss of the line power, a motion controller failure, or actuation of a limit switch by a driven member. A method of braking is also disclosed.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: May 9, 2006
    Assignee: Universal Instruments Corporation
    Inventors: Darrin M. Weiss, Andrew Zalesski
  • Patent number: 6741050
    Abstract: A control method and a switching circuit for braking an electronically commutated electrical motor, wherein operation is in a phase period (T) of an inverter relative to at lest one winding, sequentially, both in a motoring mode and a generating operating mode using various cycles (t1-t2, t3-t4) beginning with zero, such that the driving and braking torques associated with the cycles (t1-t2, t3-t4) produce a resultant braking moment averaged over the phase period (T).
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: May 25, 2004
    Assignee: Hilti Aktiengesellschaft
    Inventors: Walter Wissmach, Rudolf Bauer, Vilmos Török
  • Patent number: 6157153
    Abstract: A motor driver has a braking control circuit. The braking control circuit shuts off the supply of an electric current to the coils included in the motor when a motor control signal shifts to a predetermined level and, after a predetermined length of time secured in accordance with an index signal, starts application of braking to the rotation of the motor by the use of a braking circuit. The index signal is obtained from the signal that indicates the rotational position of the motor. The motor control signal is fed from a control signal generating circuit to the braking control circuit.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: December 5, 2000
    Assignees: Rohm Co., Ltd., Teac Corporation
    Inventors: Tomoaki Uegami, Takahiro Sakaguchi
  • Patent number: 6121739
    Abstract: The invention relates to a method for enhancing the dosing precision of a dosing pump which is driven by an asynchronous motor via an eccentric gear. The supply of the motor is cut off approximately half a cycle time before a desired dosing pause period or stoppage. The motor freewheels afterwards for part of the cycle time, before a direct voltage is applied to it for approximately a quarter cycle time, such that an eddy current is induced in the rotor, which produces an antipolarized magnetic field which brakes the rotor.
    Type: Grant
    Filed: June 23, 1999
    Date of Patent: September 19, 2000
    Assignee: Lang Apparatebau GmbH
    Inventor: Albert Haberlander
  • Patent number: 5963006
    Abstract: An apparatus for controlling a stepping motor used in feeding a sheet, for example, in a facsimile device, includes a driving unit for driving a stepping motor, and an controller for controlling the drive unit, depending upon drive conditions of the stepping motor, to control at least one of the excitation method and the drive current of the stepping motor, thereby suppressing the generation of heat upon stopping of the motor, and stabilizing the rotation thereof.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: October 5, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventor: Atsushi Otani
  • Patent number: 5825154
    Abstract: A method of smoothly stopping pump drives without pressure surges is provided. To accomplish this, the phase control angle between the motor current and the motor voltage is increased according to a linear ramp starting from with the help of an a.c. power controller, where the phase angle decreases and reaches a turning point. If the turning point is detected by observing the phase angle, the phase control is based on this by means of a controller with a predefined linear phase angle reference curve as a function of time. Then the motor rpm does not change abruptly because a rapid change in phase angle is prevented.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: October 20, 1998
    Assignee: Siemens Aktiengesellschaft
    Inventors: Diethard Runggaldier, Johann Seitz
  • Patent number: 5708333
    Abstract: A series-wound motor, wherein, for braking purposes, the polarity of the armature of the motor is reversed for the opposite direction of rotation. The current supply for the motor is maintained until the armature comes substantially to a standstill and subsequently, the current supply to the motor is interrupted. The braking time is controlled in dependence upon operating parameters. For example, the braking time can be controlled by a predetermined time constant for the interruption of the current supply. To prevent running in the opposite direction, a reversal preventing device can be provided.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: January 13, 1998
    Assignee: Robert Bosch GmbH
    Inventor: Manfred Kirn
  • Patent number: 5528164
    Abstract: A supplemental monitoring device which issues an error signal when the monitoring device loses motor drive pulses is disclosed. Also disclosed is providing a manufacturing system with a normally closed relay which controls the flag, thus advantageously providing a semiconductor system which automatically interrupts the ion beam in the event of a system malfunction.
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: June 18, 1996
    Assignee: NEC Electronics, Inc.
    Inventor: Cameron Huiting
  • Patent number: 5449992
    Abstract: A braking circuit for an electric motor includes a braking device for being connected in a circuit for braking the electric motor, a braking switch including first and second changeover switches for switching between a motor mode and a braking mode, and a control device. Switching contacts of the first and second changeover switches are switched between a first position for contacting, respectively, first stationary contacts of the first and second changeover switches in the motor mode, and a second position for contacting, respectively, second stationary contacts of the first and second changeover switches in the braking mode.
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: September 12, 1995
    Assignee: Marquardt GmbH
    Inventors: August Geiger, Alexander Knappe, Michael Bufe
  • Patent number: 5239331
    Abstract: A device for braking an electric motor as the drive source of an operating mechanism in camera by means of an electrical circuit is disclosed. This circuit includes a detector for levels of the rotation speed of the motor or of factors of influencing the rotation speed sensed when the motor is supplied with current flowing in a direction to activate the operating mechanism, and control means responsive to the output of the detector for altering the time for which a current flow of reversed direction is supplied to brake the motor.
    Type: Grant
    Filed: March 24, 1992
    Date of Patent: August 24, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Kobe, Takayuki Tsuboi
  • Patent number: 4975627
    Abstract: In an elevator, an electric motor is connected to a brake through a gearbox. The brake is controlled with an electromagnet. A torque signal is applied to the motor. Brake voltage characteristics are used to detect actual brake engagement and to signal a switch to substitute a decaying torque control signal to the motor for the motor torque signal supplied to the motor while the elevator is moving. Motor torque is thereby gradually rather than suddenly reduced to zero.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: December 4, 1990
    Assignee: Otis Elevator Company
    Inventor: Narasimha K. Reddy
  • Patent number: 4833375
    Abstract: A digital motor control system includes a flip-flop latch for receiving motor circuit drive data from a microprocessor, a counter for counting to a predetermined value representing the total duration of a motor drive pulse, a comparator for comparing the incrementing counter value with the motor circuit drive data stored in the latch to provide a pulse width modulated signal, delay circuitry for preventing overlapping of motor brake and motor drive signals, a drive gate controlled in part by said pulse width modulated signal for applying a drive signal for motor control, and a brake gate for applying a brake signal for motor control.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: May 23, 1989
    Assignee: NCR Corporation
    Inventor: James R. Del Signore, II
  • Patent number: 4549120
    Abstract: A drive motor control device for a video disk player or the like operates to brake the motor by driving it reversely upon reception of a rotation termination signal, until it is detected that the motor has stopped and rotates reversely. The motor is then driven forwardly for a predetermined time before being allowed to rotate freely to a stop.
    Type: Grant
    Filed: July 19, 1983
    Date of Patent: October 22, 1985
    Assignee: Pioneer Electronic Corporation
    Inventors: Tsutomu Banno, Michiaki Hayashi, Hitoshi Senso
  • Patent number: 4419609
    Abstract: Device for the attenuation of the movement of the reel motors in recording devices during standstill of the tape capstan drive roller. The regulation of the reel motors proceeds during the normal run of the tape via the motor current and during the standstill of the capstan drive via the voltage which lies at the reel motors.
    Type: Grant
    Filed: September 1, 1982
    Date of Patent: December 6, 1983
    Assignee: Siemens Aktiengesellschaft
    Inventor: Franz J. Meyer
  • Patent number: 4276500
    Abstract: A braking system for transportation apparatus, such as an escalator, having an electrical drive. The braking effort applied when the transportation apparatus is to be stopped is inversely proportional to the electrical energy being consumed by the electrical drive at the time the stopping decision is made.
    Type: Grant
    Filed: March 28, 1979
    Date of Patent: June 30, 1981
    Assignee: Westinghouse Electric Corp.
    Inventors: Elmer H. Sumka, Henry J. Shea
  • Patent number: 4250436
    Abstract: A universal series motor having its brushes shifted at an angle against the direction of rotation is provided with a braking arrangement which removes power from the field windings and applies power directly to the armature winding.
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: February 10, 1981
    Assignee: The Singer Company
    Inventor: Adrian Weissman
  • Patent number: 4090117
    Abstract: In a magnetic disc apparatus of contact-start-stop type, when stopping the rotation of a disc, a brake is placed into operation at the beginning of contact of a magnetic head with a disc at which the number of revolutions of the disc is decreased following turning off of a power source for motor drive. The actuation of an armature of the brake is delayed through the use of a current generated by an inertia rotation of a motor. Thus, wasteful actuation of the brake while the motor is rotating at a high speed is inhibited thereby extending the lifetime of the brake.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: May 16, 1978
    Assignee: Hitachi, Ltd.
    Inventors: Asao Sasamoto, Hideaki Amano