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Class Information
Number: 318/472
Name: Electricity: motive power systems > Automatic and/or with time-delay means (e.g., automatic starting and/or stopping) > Responsive to thermal conditions > Of motor control means
Description: Subject matter in which the sensing means is arranged to be responsive to the temperature or thermal conditions of an impedance in the circuit of the motor being controlled, or of other means employed for controlling the motor.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
7352147 Power supply to provide operation power for cooling fans Apr. 1, 2008
7331532 Acoustic noise reduction using fan speed control Feb. 19, 2008
7317296 Electric motor Jan. 8, 2008
7307396 Overload protection system for an electrical device Dec. 11, 2007
7305316 Microcontroller methods of improving reliability in DC brushless motors and cooling fans Dec. 4, 2007
7295897 Mapping a plurality of sensors to respective zones in a fan control system Nov. 13, 2007
7256562 Control circuit for a cooling fan Aug. 14, 2007
7245099 Electronic apparatus that allows cooling fan to be driven with certainty even at the time of software malfunction/lock-up or at the time of controller failure Jul. 17, 2007
7190139 Learning method for a motorized screen with orientable slats and device therefor Mar. 13, 2007
7157878 Transient compensation voltage estimation for feedforward sinusoidal brushless motor control Jan. 2, 2007
7129660 Motor-temperature estimation apparatus and motor control apparatus Oct. 31, 2006
7084593 Method and apparatus for thermal management of an electric power assist steering control system by compensating steering motor current Aug. 1, 2006
7075261 Method and apparatus for controlling a fan Jul. 11, 2006
7038408 Fan motor speed control circuit May. 2, 2006
7038415 Motor driving device May. 2, 2006
7029239 Piecewise linear control of the duty cycle of a pulse width modulated signal Apr. 18, 2006
7019480 Synchronous-motor controller Mar. 28, 2006
7012400 Control circuitry for controlling rotational speed of a DC motor Mar. 14, 2006
6970643 Radiator having a fan in variable rotation speed Nov. 29, 2005
6946809 Motor driving system Sep. 20, 2005
6900607 Combined feedforward and feedback parameter estimation for electric machines May. 31, 2005
6873514 Integrated solenoid system Mar. 29, 2005
6864653 Equipment fan Mar. 8, 2005
6847187 Detection of loss of cooling air to traction motors Jan. 25, 2005
6810202 Apparatus for controlling rotational speed of motor Oct. 26, 2004
6737824 Fan acceleration control May. 18, 2004
6495982 Electric motor control Dec. 17, 2002
6453260 Apparatus and method for collecting motor test data Sep. 17, 2002
6407525 Thermal control variable speed fan motor Jun. 18, 2002
6396231 Fan motor having two-stage speed control May. 28, 2002
6396675 Computer power supply device having dual adjustment temperature controlled air flow device May. 28, 2002
6392376 Electric vehicle motor controller with temperature variation compensation May. 21, 2002
RE37589 Collectorless direct current motor, driver circuit for a drive and method of operating a collectorless direct current motor Mar. 19, 2002
6356047 Starting device for electric motors, which includes a PTC resistor and a relay in series Mar. 12, 2002
6323613 Drive unit with two coolant circuits for electric motor Nov. 27, 2001
6307343 Driving controlling apparatus of a hood motor Oct. 23, 2001
6285150 Method for controlling the operating voltage of a fan in electrical equipment Sep. 4, 2001
6229275 Semiconductor integrated circuit device for use in a disk drive May. 8, 2001
6198245 Look-ahead closed-loop thermal management Mar. 6, 2001
6169381 Unit and method of driving with motor, and apparatus for recording and/or reproducing recording medium Jan. 2, 2001
6140786 Method for controlling a temperature of an electric motor Oct. 31, 2000
6135718 Interface apparatus for fan monitoring and control Oct. 24, 2000
6111379 Circuit configuration for driving an electrical drive unit Aug. 29, 2000
6100660 Current supply controller for an electric motor Aug. 8, 2000
6066931 Motor controller unit having thermal startup protection May. 23, 2000
6040668 Monolithic fan controller Mar. 21, 2000
6023107 Circuit arrangement for controlling a wiper motor Feb. 8, 2000
5926386 Configuration based cooling fan speed control Jul. 20, 1999
5821715 Pulsed alignment commutation state for sensorless motor start Oct. 13, 1998
5712802 Thermal protection of traction inverters Jan. 27, 1998

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