Running-speed Control Patents (Class 318/66)
- With speed-difference detector (Class 318/69)
- Controlling motor speed in response to speed of another motor (Class 318/77)
- Control of both armature (or primary) and field (or secondary) circuits (Class 318/79)
- Armature or primary circuit control (Class 318/80)
- Field secondary circuit control (Class 318/81)
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Patent number: 7847494Abstract: In particular in articles of furniture having at least an element which may be adjusted with a DC motor, preferably via a mechanical transmission, it is desirable to have a level of acoustic noise as low as possible. The power supply to the DC motor is based on a transformer with rectification and smoothing. With the invention it has surprisingly been found that the level of acoustic noise may be reduced significantly in that the secondary side of the transformer has a first control to compensate for the loss in the motor, thereby keeping the speed thereof constant for a long period of time, and a second control adapted to remove the ripple in the voltage, thereby keeping the speed of the motor constant for a short period of time.Type: GrantFiled: April 16, 2003Date of Patent: December 7, 2010Assignee: Linak A/SInventor: Jeppe Bastholm
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Patent number: 7834563Abstract: The present invention provides a method for controllably moving a plurality of antennae in a wireless communications system. The method comprises activating a first and second actuator associated with a first and second one of the plurality of antennae to move the first and second antennae to a desired position. The power delivered to the first and second actuators is measured, and at least one parameter of at least one of the first and second actuators is reduced in response to the measured power being greater than a setpoint.Type: GrantFiled: December 29, 2006Date of Patent: November 16, 2010Assignee: Alcatel-Lucent USA Inc.Inventors: Claus Martin Keuker, Guenter Lothar Wolf
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Patent number: 7808192Abstract: A heat dissipation system includes at least one fan, at least two controllers, a signal generator, and a signal converter. The controllers are electrically connected to the fan and generate an enable signal according to a feedback signal of the fan. The signal generator is electrically connected to the controllers and generates a control signal according to the enable signal. The signal converter is electrically connected to the signal generator and the fan, converts the control signal to a drive signal to the fan, thereby controlling rotation speed of the fan.Type: GrantFiled: March 29, 2006Date of Patent: October 5, 2010Assignee: Delta Electronics, Inc.Inventors: Wen-Chuan Ma, Nien-Hao Hsu, Wen-Shi Huang
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Patent number: 7733037Abstract: An integrated skid system integrates the functions of multiple skids into a single skid to reduce the skid footprint and the complexity of the overall system. A multi-motor controller monitors the devices on the integrated skid to maintain proper temperature, pressure and current draw in the devices. Base on this information, the multi-motor controller can make decisions on faults and fault accommodation and communicate with a main controller regarding the operating states of the skid devices via a single serial or Ethernet-type connection.Type: GrantFiled: April 1, 2004Date of Patent: June 8, 2010Assignee: Hamilton Sundstrand CorporationInventors: Kenneth Marks, Douglas A. Parsons
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Patent number: 7714524Abstract: A system and method for controlling multiple cooling fans is presented. The circuitry for directly driving each of the motors is removed from the motor casings, thus increasing air flow and reducing replacement costs should a motor fail. The system includes a common processor for centrally controlling the speeds of the motors and monitoring the performance of each of the multiple motors.Type: GrantFiled: December 18, 2007Date of Patent: May 11, 2010Assignee: Minebea Co., Ltd.Inventors: Scott Frankel, Nigel Strike, Eric Hardt, Takashi Shinano
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Patent number: 7715964Abstract: A method of operating a vehicle at a substantially low speed based on change in the vehicle position. The method comprises the following steps: (A) transforming a steering control algorithm into a substantially low speed (SLS) steering control algorithm, wherein the (SLS) steering control algorithm is configured to operate the vehicle in an asynchronous low speed mode; and (B) implementing the SLS steering control algorithm as a controller configured to operate the vehicle in the asynchronous low speed mode.Type: GrantFiled: May 10, 2005Date of Patent: May 11, 2010Assignee: Trimble Navigation, Ltd.Inventor: John Arnold Connally
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Patent number: 7683558Abstract: An electric car control apparatus with which it is possible to make the size of equipment small. The control apparatus includes current detectors for respectively detecting currents flowing through collector shoes mounted on a leading car; a no-current indicator for outputting a no-current signal when the currents detected by these current detectors are zero; a no-current train line for transmitting the no-current signal to the following car; and disconnection timer mounted on each of the cars for, when inputting a speed signal and a no-current signal, in correspondence with the speed of the cars outputting a disconnection signal for causing a connector to disconnect after a predetermined time such that it is possible to determine that there is a dead section or gap.Type: GrantFiled: April 7, 2005Date of Patent: March 23, 2010Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Takatomi Hirai
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Patent number: 7679298Abstract: A method for controlling a wheel speed of a locomotive includes determining an estimated wheel speed (52) for a desired wheel set of a locomotive responsive to a locomotive operating parameter indicative of an actual wheel speed of the desired wheel set. The method also includes generating a first adjustment parameter (e.g., 46) based on an operating condition of the locomotive, and then applying the first adjustment parameter to the estimated wheel speed for generating a first adjusted estimated wheel speed signal (54) used as a first input for controlling a wheel speed of at least one of the desired wheel set and the other wheel sets of the locomotive.Type: GrantFiled: August 17, 2006Date of Patent: March 16, 2010Assignee: General Electric CompanyInventor: Ajith Kuttannair Kumar
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Patent number: 7671548Abstract: An electric drive system comprising several electric drives, each of which comprises an electric motor, and a control system which is arranged to control said several electric drives and comprises a first outer controller and a first speed controller. A signal supplied to the input of the first speed controller is generated by using the output signal of said first outer controller, and the first speed controller is arranged to generate an output torque signal at its output. The control system further comprises a torque controller per each electric drive, which torque controller is arranged to control the torque of the corresponding electric motor. A signal supplied to the input of each torque controller is generated by using the output torque signal of the first speed controller.Type: GrantFiled: June 1, 2007Date of Patent: March 2, 2010Assignee: ABB OyInventor: Osmo Pasuri
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Patent number: 7656107Abstract: The invention relates to a control circuit for an arrangement having at least two DC motors (10, 12), which can be connected in parallel to a DC voltage system (16, 18), in particular a circuit for controlling at least two motors of a motor vehicle fan. In this case, the DC motors (10, 12) can be connected to the DC voltage system (16, 18), on the one hand, during starting, jointly via in each case one series resistor (22, 24) having a low resistance value and a common semiconductor switching element (26) and, on the other hand, during operation, via separate semiconductor switching elements (32, 34), the series circuit comprising the separate series resistors (22, 24) and the common semiconductor switching element (26) being arranged in parallel with the separate semiconductor switching elements (30, 32) for controlling the motors during operation.Type: GrantFiled: June 26, 2006Date of Patent: February 2, 2010Assignee: Robert Bosch GmbHInventor: Stefan Koch
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Patent number: 7629756Abstract: Methods and apparatus are provided for controlling first and second motors. A controller includes a processor supplying a control signal for driving the motors and a logic circuit coupled to the processor. The processor produces a first trigger coordinated with the rate of the first motor and a second trigger coordinated with the rate of the second motor. The logic circuit produces a third trigger from a combination of the first and second triggers. The processor includes a converter for sampling the currents of the motors in response to the third trigger. The processor further produces a modified pulse width in the first trigger if a period between the first and second triggers is less than a predetermined limit and directs the converter to consecutively sample the currents in response to the modified pulse width.Type: GrantFiled: June 28, 2007Date of Patent: December 8, 2009Assignee: GM Global Technology Operations, Inc.Inventors: Terry Murrell, Daniel L. Kowalewski
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Patent number: 7602128Abstract: A motor controller for controlling an electric motor including a soft starter and a human-machine interface for control and configuration of the soft starter. The soft starter includes a visual display and a selector associated with the visual display. A method to configure a motor controller for controlling an electric motor, including a soft starter and a human-machine interface for control and configuration of the soft starter. A computer program and graphic user interface for carrying out the method.Type: GrantFiled: March 2, 2004Date of Patent: October 13, 2009Assignee: ABB ABInventors: Sören Kling, Gunnar Johansson
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Patent number: 7598687Abstract: A method for controlling a first fan motor using a first pulse width modulation signal having a first pulse control factor, and for controlling a second fan motor using a second pulse width modulation signal having a second pulse control factor, so as to bring about an overall air output according to a prespecified setpoint air output by the operation of the first and the second fan motor, a low-pass filter being provided in parallel to the fan motors in order to smooth out voltage fluctuations in voltage supply lines, wherein the first and the second pulse control factor are made available independently of each other, in order to minimize the current through the low-pass filter.Type: GrantFiled: October 21, 2003Date of Patent: October 6, 2009Assignee: Robert Bosch GmbHInventors: Peter Buerk, Stefan Koch, Karl Preis
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Publication number: 20090179600Abstract: The present invention provides a motor drive system that is substantially more robust than those of the prior art. Generally, the motor drive system provides a redundant communication topology with the drives, thereby greatly reducing the chance of failure by a fault in the drive-to-drive communication link. Specifically, the motor drive system includes a plurality of motor drives joined by a communication media. Each motor drive has a motor control circuit configured to control the speed of an electric motor and a media access control unit having two communication modules. Each communications module includes a transmitter and a receiver joined to the communications media. A set of routing switches in the media access control unit joins the communication modules to connect the motor drives in an independent primary and a secondary ring communicating data for controlling the motor drives.Type: ApplicationFiled: January 14, 2008Publication date: July 16, 2009Inventor: Stephen J. Worrall
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Patent number: 7561829Abstract: A motor control device includes a velocity detection unit, a motor control unit, a phase difference detection unit, and a correction value calculation unit. The velocity detection unit detects each velocity of a plurality of driven bodies or of a plurality of motors which independently drives a corresponding one of the driven bodies. The motor control unit independently controls each of the motors based on the velocity and a predetermined velocity directive value. The phase difference detection unit detects a phase difference among each of the driven bodies. The correction value calculation unit calculates a correction value for the velocity or the velocity directive value based on the phase difference.Type: GrantFiled: December 6, 2006Date of Patent: July 14, 2009Assignee: Brother Kogyo Kabushiki KaishaInventor: Shigeki Akiyama
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Patent number: 7550936Abstract: A fan motor drive control apparatus comprises a plurality of drive circuits for driving respectively a plurality of fan motors, and a speed change-over control circuit for transmitting a control signal for changing over speeds of the fan motors, to the plurality of the drive circuits, wherein each of the drive circuit comprises a stopping detection terminal for detecting stopping of a fan motor as an object to be driven, and the speed change-over control circuit transmits the control signal in accordance with a signal received from the stopping detection terminal.Type: GrantFiled: February 17, 2006Date of Patent: June 23, 2009Assignee: Nidec Sankyo CorporationInventor: Yukinobu Kurita
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Patent number: 7548034Abstract: A centrifuge including: a rotor rotating with a sample contained therein; a rotating shaft rotatably engaged with the rotor; a motor rotating the rotor and the rotating shaft; a belt transmitting rotational force of the motor to the rotating shaft; a rotor speed detecting unit detecting a rotation speed of the rotor; a motor speed detecting unit detecting a rotation speed of the motor; and a control unit controlling the motor, wherein the control unit calculates a signal for controlling the rotation speed of the rotor on the basis of a signal from the rotor speed detecting unit and controls the motor on the basis of a signal from the motor speed detecting unit and the calculated signal.Type: GrantFiled: November 29, 2006Date of Patent: June 16, 2009Assignee: Hitachi Koki Co., Ltd.Inventors: Hiroyuki Takahashi, Takahiro Fujimaki, Hisanobu Oyama
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Publication number: 20090134820Abstract: A vehicle drive unit that includes a first rotary machine; an electric differential; a second rotary machine that transmits power from the electric differential to wheels via a first power transmission interrupt mechanism; a second power transmission interrupt mechanism that connects the second rotary machine to an input member of the electric differential; and a control device. The control device switches between a first operation mode, in which the first power interruption mechanism is in a power transmitting state and the second power interruption mechanism is in a power disconnected state, and a second operation mode, in which the first power interruption mechanism in a power disconnected state and the second power interruption mechanism in a power transmitting state. To avoid generation of a shock, the operation mode is switched when the torque of the second rotary machine is nearly 0.Type: ApplicationFiled: November 12, 2008Publication date: May 28, 2009Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masataka Sugiyama, Masato Adachi, Haruhisa Suzuki
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Patent number: 7538500Abstract: A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the motors, motor position sensing circuitry, and motor control circuitry. The system and method provide for improved motor current waveform sensing that is able to effectively reject false brake pulses, avoid erroneous processing due to fluctuating battery voltage levels, and reduce the sensitivity to variations in motor current signals due to dynamic motor load, manufacturing variation, system aging, temperature, brush bounce, EMI, and other factors. The system and method also include an improved ability to multiplex additional external motor drivers to the motor control circuitry, select between sequential and simultaneous drive modes using an SPI bit, and monitor the system controller for an error condition and simultaneously driver motors in response to the error condition.Type: GrantFiled: July 17, 2008Date of Patent: May 26, 2009Assignee: Delphi Technologies, Inc.Inventors: David D. Moller, Philip K. Schneider, Oscar M. Alcantara, Salvador A. Canales
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Patent number: 7538502Abstract: A motor driver circuit comprising a diving circuit for driving at least one motor, a plurality of DC/DC converters, and a stopping circuit for stopping the DC/DC converter if failure is detected in an output of the DC/DC converter, wherein a first signal is outputted when a specific DC/DC converter of the plurality of DC/DC converters is stopped by the stopping circuit, and a specific DC/DC converter is recovered when a second signal is inputted. A CPU of an apparatus incorporated with the motor driver circuit is informed that the specific DC/DC converter has been stopped by the stopping circuit. Moreover, the stopped DC/DC converter can be recovered without need for turning off a power supply of the motor driver circuit itself.Type: GrantFiled: September 4, 2008Date of Patent: May 26, 2009Assignee: Canon Kabushiki KaishaInventor: Masayuki Hongo
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Publication number: 20090121661Abstract: An electrical control device is described.Type: ApplicationFiled: November 8, 2007Publication date: May 14, 2009Applicant: Cooper Technologies CompanyInventors: Rohit Dodal, Feihong Chen
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Patent number: 7525262Abstract: An automatic clothes dryer comprises a cabinet in which is rotatably mounted a drum that defines a drying chamber and a motor for rotating the drum. A variable speed blower is mounted within the interior space and is fluidly coupled to the drying chamber for moving air through the drying chamber at varying flow rates to improve the drying of the clothes.Type: GrantFiled: January 12, 2005Date of Patent: April 28, 2009Assignee: Whirlpool CorporationInventor: James P. Carow
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Patent number: 7525263Abstract: A master unit and a plurality of slave units are connected by way of a communication path. The master unit sends to the slave units timing signals generated by its own cycle signal generator by way of a communication path. The slave units determine the cycle difference and the phase difference between a timing signal generated by its own cycle signal generator and the timing signal sent from the master unit and, in accordance therewith, determine a cycle adjustment amount. The cycle signal generators of the slave units adjust the timing signal cycle based on the cycle adjustment amount.Type: GrantFiled: February 7, 2007Date of Patent: April 28, 2009Assignee: Fanuc LtdInventors: Kazunari Aoyama, Minoru Nakamura, Takaaki Komatsu
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Patent number: 7521881Abstract: A constant speed barrier operator comprises a controller, a memory unit, a potentiometer, a pulse counter, and a motor control. The potentiometer and pulse counter monitor the position and speed of an access barrier. As the access barrier is moved between open and closed positions the controller samples the position and speed of the access barrier. These samples are used to analyze whether the speed at a given point deviates from a predetermined speed selected for the access barrier. If a variation exists, the controller takes corrective action by changing power settings for the motor for a given access barrier position.Type: GrantFiled: September 30, 2005Date of Patent: April 21, 2009Assignee: Wayne-Dalton Corp.Inventors: Paul J. VanDrunen, Jason L. Mamaloukas, James S. Murray
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Patent number: 7518323Abstract: A motor driving device is disclosed that includes a first drive circuit that drives a first electric motor and increases a rotational speed of the first electric motor according to an increase in a duty ratio of a pulse signal output from an electronic control unit. The motor driving device also includes a second drive circuit that drives a second electric motor and increases the rotational speed of the second electric motor according to the increase in the duty ratio of the pulse signal. The second drive circuit smooths the pulse signal from the electronic control unit to produce a direct-current voltage. Also, the second drive circuit supplies electric power to the second electric motor by applying the direct-current voltage to the second electric motor.Type: GrantFiled: October 30, 2006Date of Patent: April 14, 2009Assignee: Denso CorporationInventor: Katsuji Kuwada
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Patent number: 7508148Abstract: A current sensor 8a detects a motor current of a steering motor 5 which supplies a steering mechanism 1 with steering force corresponding to the steering amount applied to a steering wheel 2. A main controller 4 extracts component within a predetermined frequency range out of a motor current detected by the current sensor 8a, amplifies the extracted component and drives a reaction force motor 3 in a controlled manner so as to supply the steering wheel 2 with steering reaction force corresponding to the steering amount applied to the steering wheel 2 and steering reaction force corresponding to a current of the component, which has been extracted and amplified. The vehicle steering apparatus constructed as above can supply steering means with steering reaction force corresponding to component within a predetermined frequency range of a motor current of the steering motor.Type: GrantFiled: October 29, 2003Date of Patent: March 24, 2009Assignee: Koyo Seiko Co., Ltd.Inventor: Koji Kanda
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Patent number: 7508146Abstract: A dual fan module system 28 includes a two-speed electric motor 12 for operating a first fan 36, a one-speed electric motor 14 for operating a second fan 38, and switching structure K1, K2, K3, and K4 constructed and arranged to operate the system at more than two different speeds.Type: GrantFiled: May 6, 2005Date of Patent: March 24, 2009Assignee: Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, WürzburgInventors: Attila Simofi-Ilyes, Andrew Lakerdas, Mike Toner, Alex Gubbels, Jahan Kargar
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Patent number: 7489092Abstract: A system, fan controller and method for enhanced alert notification. Embodiments provide an effective mechanism for utilizing system fans to create alert tones or messages, where fan speed differentials may be adjusted to alter the frequency of the fan interference sounds. As such, existing hardware can be used to reduce cost by producing audible alerts which may be heard above ambient noise in a room with one or more electronic systems. Further, the frequency of the interference sounds may be altered to more clearly identify one or more systems to which a fault pertains.Type: GrantFiled: September 28, 2006Date of Patent: February 10, 2009Assignee: Cypress Semiconductor CorporationInventors: Steven P. Larky, Darrin Vallis
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Publication number: 20090009108Abstract: A motor driver circuit comprising a diving circuit for driving at least one motor, a plurality of DC/DC converters, and a stopping circuit for stopping the DC/DC converter if failure is detected in an output of the DC/DC converter, wherein a first signal is outputted when a specific DC/DC converter of the plurality of DC/DC converters is stopped by the stopping circuit, and a specific DC/DC converter is recovered when a second signal is inputted. A CPU of an apparatus incorporated with the motor driver circuit is informed that the specific DC/DC converter has been stopped by the stopping circuit. Moreover, the stopped DC/DC converter can be recovered without need for turning off a power supply of the motor driver circuit itself.Type: ApplicationFiled: September 4, 2008Publication date: January 8, 2009Applicant: CANON KABUSHIKI KAISHAInventor: Masayuki Hongo
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Patent number: 7467592Abstract: A feed dog drive motor and an X-direction motor are connected to common input/output ports of a CPU via first and second driver IC circuits, respectively. In response to a drive switching signal generated from the CPU, selected one of the first and second driver IC circuits is enabled, causing the feed dog drive motor and the X-directional motor to selectively energize. A common driver IC circuit can be used in place of the first and second driver IC circuits. With such a configuration, the number of input/output ports of the CPU as well as the number of driver IC circuits can be reduced.Type: GrantFiled: April 13, 2006Date of Patent: December 23, 2008Assignee: Brother Kogyo Kabushiki KaishaInventors: Koichi Hosoi, Eiichi Hamajima, Masaru Jimbo, Ryoji Owaki
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Patent number: 7463000Abstract: A method of controlling, by an adaptive control method, an electric motor as a drive source of an operating apparatus that operates, based on a driving force produced by the electric motor, under an arbitrary one of a plurality of operating conditions, and exhibits different dynamic characteristics corresponding to the plurality of operating conditions.Type: GrantFiled: June 30, 2006Date of Patent: December 9, 2008Assignee: Brother Kogyo Kabushiki KaishaInventor: Shigeki Akiyama
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Patent number: 7449849Abstract: A motor control circuit and method thereof serving a coil for controlling the motor. The motor control circuit comprises a separated signal generating circuit generating a separated signal and a comparator comparing a first phase signal from a Hall element or a second phase signal from a phase signal generating circuit with the separated signal. Thus, a motor speed control signal is generated to control the motor. The noise is reduced during controlling the motor.Type: GrantFiled: October 25, 2005Date of Patent: November 11, 2008Assignee: Delta Electronics, Inc.Inventors: Chun-Lung Chiu, Ming-Shi Tsai, Wen-Shi Huang
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Patent number: 7432673Abstract: A method, medium, and apparatus for controlling a spindle motor of a disk drive. Particularly provided is a method, medium, and apparatus changing a current gain of a spindle motor driver according to the operating environment of the spindle motor. The method of controlling the spindle motor, using the current gain change of the spindle motor driver, includes monitoring a spindle drive control signal indicating the operating environment of the spindle motor and changing a current gain of the spindle motor driver based on the indicated operating environment.Type: GrantFiled: December 8, 2005Date of Patent: October 7, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Kyoung-whan Oh, Cheol-hoon Park, Sang-hoon Chu
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Patent number: 7429836Abstract: A motor driver circuit includes a diving circuit for driving at least one motor, a plurality of DC/DC converters for respectively generating different voltages, a detection circuit to detect an output failure in the plurality of DC/DC converters, and a stopping circuit for stopping a specific DC/DC converter if failure is detected in an output of the specific DC/DC converter. In addition, a signal output circuit outputs a first signal if the specific DC/DC converter of the plurality of DC/DC converters is stopped by the stopping circuit, recovery means recovers the specific DC/DC converter when a second signal is inputted, and a reset circuit stops the rest of the plurality of DC/DC converters, if the stopping circuit stops any one of the plurality of DC/DC converters other than the specific DC/DC converter.Type: GrantFiled: June 1, 2005Date of Patent: September 30, 2008Assignee: Canon Kabushiki KaishaInventor: Masayuki Hongo
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Patent number: 7425806Abstract: A variable speed drive is provided having a converter to convert an AC voltage to a DC voltage, a DC link to filter and store energy from the converter, and a plurality of inverters. Each inverter is configured to convert a DC voltage to an AC voltage and is electrically connected in parallel to the DC link. An interleaved pulse width modulation control technique is used to control the operation of the plurality of inverters and possibly the converter to lower the RMS ripple current in the DC link.Type: GrantFiled: April 12, 2004Date of Patent: September 16, 2008Assignee: York International CorporationInventors: Harold Robert Schnetzka, Ivan Jadric, Scott Victor Slothower
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Patent number: 7424337Abstract: In a method for increasing the control dynamics of a load driven by a direct drive via a driveshaft, a first transducer provides a first output signal indicating a first rotation speed, and a second transducer provides a second output signal indicating a second rotation speed. The direct drive is located between the first transducer and second transducer, with the second transducer being located in close proximity of the load. A mixed rotation speed is computed from a linear combination of the two rotation speed values, which is used as an actual control value of a controller of the direct drive. This method provides a very simple approach for increasing the control dynamics of a load driven by direct drive via a driveshaft.Type: GrantFiled: October 7, 2004Date of Patent: September 9, 2008Assignee: Siemens AktiengesellschaftInventors: Elmar Schäfers, Dietmar Stoiber, Hans-Peter Tröndle, Bernd Wedel
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Patent number: 7417386Abstract: A method and assembly for synchronizing machine operations, the assembly comprising a reference generator for generating a speed reference signal and a position reference signal, a plurality of slave units, each slave unit including, a mechanical device, a separate motor linked to and driving the mechanical device and a separate unit controller for controlling the unit motor, the unit controller receiving and using the reference signals to control motor operation and a synchronizer receiving the reference signals from the control signal source and simultaneously providing the reference signals to each of the slave unit controllers for use in controlling operation of the motors in a synchronized fashion.Type: GrantFiled: February 28, 2006Date of Patent: August 26, 2008Assignee: Rockwell Automation Technologies, Inc.Inventors: Richard W. Piefer, Thomas J. Rehm, Kevin L. Baumann, Christopher W. Como, John D. Davis, David C. Stringfellow
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Patent number: 7362060Abstract: A feedback control logic system for commanding a particular air conditioning unit fan speed is driven by a pulse-width modulated signal from a control unit. The engine control unit decrements the pulse-width modulated signal to the air conditioning unit fan and allows the fan to run for a predetermined time. If a particular function, such as shutting off of an air conditioner pressure switch or other sensor, has not been achieved within the predetermined time, the engine control unit again decrements the pulse-width modulated signal.Type: GrantFiled: May 24, 2005Date of Patent: April 22, 2008Assignee: BorgWarner Inc.Inventors: Thomas M. Tembreull, Eric L. Charbonneau
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Patent number: 7352141Abstract: An apparatus for monitoring and control of one or more electric motors, including a motor controller, equipped with a soft starter. The soft starter includes memory for storing operations and event data, as well as a human-machine interface for making the event information available for display and/or analysis. A method to monitor and diagnose a condition of an electric motor controlled by a motor controller equipped with a soft starter including a human-machine interface. A computer program for carrying out the method.Type: GrantFiled: March 2, 2004Date of Patent: April 1, 2008Assignee: ABB ABInventors: Sören Kling, Gunnar Johansson
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Publication number: 20080042602Abstract: A method for controlling a wheel speed of a locomotive includes determining an estimated wheel speed (52) for a desired wheel set of a locomotive responsive to a locomotive operating parameter indicative of an actual wheel speed of the desired wheel set. The method also includes generating a first adjustment parameter (e.g., 46) based on an operating condition of the locomotive, and then applying the first adjustment parameter to the estimated wheel speed for generating a first adjusted estimated wheel speed signal (54) used as a first input for controlling a wheel speed of at least one of the desired wheel set and the other wheel sets of the locomotive.Type: ApplicationFiled: August 17, 2006Publication date: February 21, 2008Inventor: Ajith Kuttannair Kumar
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Patent number: 7319299Abstract: A cooling fan, system and method for controlling cooling fans in a personal computer. A unique series of sensing points is placed on a rotating hub of a cooling fan in order to uniquely identify the particular type of cooling fan. A tachometer sensor mounted in the cooling fan detects the unique series of sensing points as the cooling fan rotates and generates a sequence of pulses corresponding to the detected sending points. This generated pulse signal may be transmitted by the sensor to the fan control code. The fan control code may determine a particular type of cooling fan that the cooling fan is based on the generated pulse signal. Once the fan control code determines the particular type of cooling fan that the cooling fan is, the fan control code uses particular control parameters set for that particular type of cooling fan to control the cooling fan so that it operates optimally.Type: GrantFiled: June 27, 2005Date of Patent: January 15, 2008Assignee: Lenovo (Singapore) Pte. Ltd.Inventors: Joseph Wayne Freeman, Steven Dale Goodman, Isaac Karpel, Randall Scott Springfield
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Publication number: 20070290635Abstract: A motor controller which controls the driving of a plurality of motors, including for each of the plurality of motors: a motor control block for independently controlling the driving of the respective motors, wherein the respective motor control blocks includes: a storage unit that stores a pulse data value for generating a signal for carrying out drive control of a motor which is connected to this motor control block; and a pulse generator that generates the signal for carrying out drive control of the motor based on pulse data values sequentially transmitted from the storage unit, and outputs same to the motor connected to this motor control block.Type: ApplicationFiled: June 6, 2007Publication date: December 20, 2007Inventor: Yuji Yoshida
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Publication number: 20070290633Abstract: A controller for a motor and a control method for a motor change an operating condition of each motor, considering difference in operating conditions, such as loss and temperature, thus making it possible to reduce a total loss in a plurality of motors. The controller includes a first motor operating condition calculator and a second motor operating condition calculator which calculate the estimated values of losses incurred when a first motor and a second motor are driven, and a DC voltage control unit which carries out, on a motor having a largest estimated value of loss, the processing for changing a supply voltage to change the voltage of DC power supplied to inverters by a DC/DC converter, thereby reducing the difference between a phase voltage, which is the resultant vector of the voltages across terminals of the motor, and a target voltage set on the basis of an output voltage of the DC/DC converter.Type: ApplicationFiled: May 30, 2007Publication date: December 20, 2007Inventors: Hirofumi Atarashi, Hiroyuki Isegawa, Masaaki Kaizuka, Masanari Fukuchi
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Patent number: 7301293Abstract: An electric motor control apparatus including an inverter which drives a motor of an electric motor car, storage unit for storing energy for the motor, and a converter which is connected to the storage unit, the inverter comprising detection unit for detecting a power value of the motor, and transmission unit for transmitting the power value detected by the detection unit to the converter, and the converter comprising calculation unit for receiving the power value transmitted by the transmission unit, and calculating an absorption current on the basis of the received power value, and control unit for controlling the storage unit on the basis of the absorption current calculated by the calculation unit.Type: GrantFiled: May 8, 2006Date of Patent: November 27, 2007Assignee: Kabushiki Kaisha ToshibaInventors: Shinichi Toda, Yukitaka Monden
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Patent number: 7292002Abstract: In a control method for a twin synchronization in which two motors for driving two axes (moving elements 3) mechanically fastened to each other by a fastening part (a fastening jig 6) are synchronously operated, one of the two axes is operated at low speed by a position control and the other axis is allowed to freely run and follow the one axis and a return to the origin is performed. A positional deviation between the one axis and the other axis is measured at an arbitrary pitch. The positional deviation corresponding to a position where the one axis travels is stored in a data base as a function. One position command is directly distributed to the one axis as a main position command and the position command is distributed to the other axis as a position command corrected by using the function stored in the data base to perform an operation.Type: GrantFiled: April 20, 2004Date of Patent: November 6, 2007Assignee: Kabushiki Kaisha Yaskawa DenkiInventors: Kanji Watanabe, Kazuhiko Watariyou, Naoto Kiyota
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Patent number: 7288909Abstract: The maximum frequency and the minimum frequency are extracted from frequencies corresponding to respective axle speeds. The minimum frequency is subtracted from the maximum frequency to achieve a first frequency deviation, and also the first frequency deviation is input as a primary delay system to achieve a second frequency deviation. Furthermore, the second frequency deviation is subtracted from the first frequency deviation to achieve an idle running detection setting deviation, and also an idle running detection set value for judging the idle running of the wheels at the frequency level is achieved. The idle running frequency deviation and the idle running detection set value are compared with each other to output an idle running detection signal, and also a torque correction amount of an AC electric motor is calculated on the basis of the idle running detection signal.Type: GrantFiled: May 17, 2005Date of Patent: October 30, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Ryo Yokozutsumi, Hideto Negoro
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Patent number: 7279856Abstract: A hot-pluggable I/O annex module of a storage processor assembly includes interface circuitry providing connections to an optional I/O interface module. The I/O annex module includes redundant cooling fans providing cooling airflow to an I/O annex mounting area, main power conversion circuitry for generating main operating power for the interface circuitry, auxiliary power conversion circuitry for generating auxiliary power, a controller for monitoring and controlling the operation of cooling fans; and monitoring circuitry powered by the auxiliary power for monitoring correct operation of the controller and, upon detecting incorrect operation, disabling the main power conversion circuitry.Type: GrantFiled: March 31, 2006Date of Patent: October 9, 2007Assignee: EMC CorporationInventors: Douglas Sullivan, Stephen Strickland, Michael J. Kozel
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Patent number: 7256558Abstract: A brushless motor according to the present invention provided with a recording disk in a rotational member and serving to rotate the recording disk together with the rotational member comprises a first position detecting means for detecting a rotational position of the rotational member, a second position detecting means for detecting a rotational position of the recording disk, wherein a mode for rotating the rotational member at a high speed by a detection signal of the first position detecting means and a mode for rotating the rotational member at a low speed by a detection signal of the second position detecting means are generated. Thereby, the two rotation states whose rotation speeds are different can be obtained in a simplified constitution.Type: GrantFiled: August 2, 2005Date of Patent: August 14, 2007Assignee: Nidec CorporationInventors: Naoki Mine, Eiji Miyamoto
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Patent number: 7248005Abstract: A dual motor arrangement includes a first motor M1, a first MOSFET Q1 constructed and arranged to control operation of the first motor, a second motor M2, a second MOSFET Q2 constructed and arranged to control operation of the second motor, an RFI filter structure L1, C_RFI, a freewheeling circuit L2, C2, and a controller S. The controller is constructed and arranged to provide a first PWM signal to the first MOSFET and a second PWM signal to the second MOSFET. The second PWM signal is in staggered time relation with respect to the first PWM signal. When one motor is in a freewheeling mode of operation for at least a portion of a time that the MOSFET, associated with the other motor, is on, freewheeling of the one motor decreases an amount of current drawn by the other motor during turn on of the other motor. The inductors L1, L2 can be coupled to define a transformer.Type: GrantFiled: January 25, 2006Date of Patent: July 24, 2007Assignee: Siemens Canada LimitedInventor: John E. Makaran
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Patent number: 7248004Abstract: A radiator blower, in particular for motor vehicles, is indicated that comprises a plurality of individual fans (11, 12), each having an electrical drive motor (13, 14), and a plurality of switches (S1, S2, S3), each capable of being switched over into two positions, by means of which the drive motors (13, 14) are capable of being turned on and back off individually or in a series or parallel connection. To prevent disturbing noises from developing when the individual fan (11, 12) comes to rest after being turned off, when the operating drive motor or motors (13, 14) is/are turned off, an electronic control unit (20) forces the switches (S1, S2, S3)—at least temporarily—over into switch positions that bring about a short-circuiting of the turned-off drive motor or motors (FIG. 1).Type: GrantFiled: August 2, 2002Date of Patent: July 24, 2007Assignee: Robert Bosch GmbHInventor: Michael Strupp