Chopper control system

Details Chopper control system Chopper control system

1974-11-11

1976-03-16

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307252M, 307269, 318138, 318341, 321 45C, H03K 1772, H02M 748

Patent

active

039448568

ABSTRACT:
A system for controlling a thyristor chopper used for the speed control of a d.c. motor driving an electric car, in which means are provided for generating turn-on pulses and turn-off pulses at the maximum chopping frequency of the chopper, dividing the frequency of the turn-on pulses and turn-off pulses stepwise in response to the application of chopping frequency instruction signals, and applying these frequency-divided turn-on and turn-off pulses to the chopper for controlling the chopper, so that the motor can be smoothly controlled by the chopper whose chopping frequency varies stepwise from a low to a high valve with conductive rate-control.

REFERENCES:
patent: 3747000 (1973-07-01), Melver

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