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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
5661384 Motor control system and method Aug. 26, 1997
5463294 Control mechanism for electric vehicle Oct. 31, 1995
5363024 D.C. fan control circuit device for linearly variable cooling Nov. 8, 1994
RE34609 Collectorless direct current motor, driver circuit for a drive and method of operating a collectorless direct current motor May. 17, 1994
5123081 Temperature control system for motors and power components of a material handling vehicle Jun. 16, 1992
5023531 Dual hybrid demand refrigeration control apparatus Jun. 11, 1991
4952856 Method and apparatus for monitoring resistor temperature Aug. 28, 1990
4942347 Motor drive circuit Jul. 17, 1990
4812051 Apparatus for investigating thermal transformations Mar. 14, 1989
4804892 Collectorless direct current motor, driver circuit for a drive and method of operating a collectorless direct current motor Feb. 14, 1989
4694228 Compensation circuit for control system providing pulse width modulated drive signal Sep. 15, 1987
4689533 Controlled fan Aug. 25, 1987
4573132 Thermal model for electrical apparatus Feb. 25, 1986
4567413 Method and device for controlling power steering apparatus Jan. 28, 1986
4563624 Variable speed refrigeration compressor Jan. 7, 1986
4525763 Apparatus and method to protect motors and to protect motor life Jun. 25, 1985
4486149 Heated liquid system interlock Dec. 4, 1984
4450389 Vehicular-type generator and forced air cooling blower combination May. 22, 1984
4357565 Control apparatus for variable-speed reversible motor Nov. 2, 1982
4307325 Digital control system for electric motors in power tools and the like Dec. 22, 1981
4263540 Two-speed refrigerant motor compressor Apr. 21, 1981
4168564 Thermally protected vacuum hose assembly Sep. 25, 1979
4100468 Electric motor control and method Jul. 11, 1978
4097790 Motor protector with remote temperature simulation Jun. 27, 1978
4075865 Apparatus for controlling condenser pressure in a refrigeration system Feb. 28, 1978
4022598 Protection system for electric motor May. 10, 1977
4004204 Method for regulating the material supply to a processing machine having an electric drive motor Jan. 18, 1977
3970861 Demand controller Jul. 20, 1976

1 2 3

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