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Class Information
Number: 318/82
Name: Electricity: motive power systems > Plural, diverse or diversely controlled electric motors > Running-speed control > Armature or primary circuit control
Description: Subject matter in which means are provided for controlling the armature or primary circuits of a plurality of motors to control the (group) speed of the motors.

Sub-classes under this class:

Class Number Class Name Patents
318/83 Series-parallel armature circuit connections 16

Patents under this class:

Patent Number Title Of Patent Date Issued
8324856 Motor drive control apparatus, vehicle with motor drive control apparatus, and motor drive control method Dec. 4, 2012
8274244 Actuator system and method for extending a joint Sep. 25, 2012
7531983 Method of controlling startup current of motor and disk drive using the method May. 12, 2009
6522096 Control circuit for a robot power supply Feb. 18, 2003
5867005 AC motor winding circuit Feb. 2, 1999
5384520 Balanced drive motors with cross-coupled excitation Jan. 24, 1995
5371445 Switching device for controlling two electric motors at different speeds Dec. 6, 1994
5216343 Motor construction and method for limiting spin-up time in a hard disk drive Jun. 1, 1993
4988930 Plural motor fan system with improved speed control Jan. 29, 1991
4520299 Turning speed controller for electric vehicles having dual drive motors May. 28, 1985
4505301 Liquid mixing valve Mar. 19, 1985
4472663 Failure protection circuit for a two-motor lift truck Sep. 18, 1984
4160938 Motor drive apparatus Jul. 10, 1979
4054817 Pulse controllers Oct. 18, 1977

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