Transit vehicle start-up propulsion motor control apparatus and

Details Transit vehicle start-up propulsion motor control apparatus and Transit vehicle start-up propulsion motor control apparatus and

1985-08-01

1987-03-17

Shoop, Jr., William M.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318317, 318139, 318341, 318345E, 363124, H02P 506

Patent

active

046510702

ABSTRACT:
Current regulation is provided for the propulsion motor of a vehicle operative with a track signal block control signal having a known frequency characteristic, by modulation of a selected group of potential output ON pulses from a chopper apparatus coupled with the motor and in relation to the program cycle time of a control microprocessor such that the resulting harmonic sidebands are positioned to minimize electromagnetic interference with that control signal.

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