Motor control apparatus and method

Details Motor control apparatus and method Motor control apparatus and method

1979-10-19

1981-08-18

Smith, Jr., David

Electricity: motive power systems

Plural diverse motor controls

Running-speed control

318302, 318363, H02P 308

Patent

active

042849306

ABSTRACT:
A direct current motor controlling apparatus determines the operational speed of one or more direct current motors such as traction motors propelling a passenger vehicle along a track. The speed of the motor is established by changing the on and off conduction ratio or duty-cycle relationship of a switch device to determine the field current and the armature voltage of that motor. The present apparatus utilizes solid-state switch devices to determine the mode of operation of the motor control apparatus which solid-state switch devices are more reliable and more simple in operation and less expensive to maintain.

REFERENCES:
patent: 3295037 (1966-12-01), Bullene
patent: 3325714 (1967-06-01), Torii
patent: 3808481 (1974-04-01), Rippel
patent: 3924168 (1976-12-01), Woodward

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