H - Electricity – 02 – M
Patent
H - Electricity
02
M
346/44
H02M 3/139 (2006.01)
Patent
CA 1262380
ABSTRACT OF THE DISCLOSURE 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 micro- processor such that the resulting harmonic sidebands are positioned to minimize electromagnetic interference with that control signal.
514594
Truman William M.
Wesling Henry J.
Aeg Westinghouse Transportation Systems Inc.
Oldham And Company
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