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Class Information
Number: 318/79
Name: Electricity: motive power systems > Plural, diverse or diversely controlled electric motors > Running-speed control > Relative motor speed control > Control of both armature (or primary) and field (or secondary) circuits
Description: Subject matter in which means are provided for controlling the armature (or primary) circuit of one or more of the motors in combination with means for also controlling the field (or secondary) circuit of one or more motors, simultaneously or separately.

Patents under this class:

Patent Number Title Of Patent Date Issued
8310176 Traction control for DC electric motor Nov. 13, 2012
7990085 Generator control unit Aug. 2, 2011
7885528 System and method for focusing a charge coupled device lens on a selected surface of an object Feb. 8, 2011
7126293 Wheel slip correction system Oct. 24, 2006
5384520 Balanced drive motors with cross-coupled excitation Jan. 24, 1995
5117163 Drive system for railway vehicle May. 26, 1992
4484117 Microprocessor-based control apparatus for a direct current machine drive system Nov. 20, 1984
4047080 Common bus parallel speed regulator system Sep. 6, 1977
4012680 Field boost arrangement for separately excited D-C traction motors of a vehicle propulsion system Mar. 15, 1977

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