Chopper control system

Details Chopper control system Chopper control system

1976-03-04

1978-04-11

Schaefer, Robert K.

Electricity: motive power systems

Limitation of motor load, current, torque or force

318341, 318139, H02P 700

Patent

active

040841197

ABSTRACT:
A chopper control system for controlling the amount of power supplied from a DC power source to a load having inductance. The chopper control system comprises a chopper circuit for accomplishing the on-off control of main current flowing from a DC power source to a load having inductance, and a duty cycle control circuit for controlling the duty cycle of the chopper circuit. A flywheel circuit including a series-connected circuit of a flywheel diode and a reactor is connected in inverse parallel with the load. The counter electromotive force induced in the flywheel circuit is detected by a detecting circuit and the output of the detecting circuit is applied to the duty cycle control circuit to prevent the main current from exceeding a predetermined value.

REFERENCES:
patent: 3541416 (1970-11-01), Woyton
patent: 3562611 (1971-02-01), Gurwicz
patent: 3588654 (1971-06-01), Balazs
patent: 3624475 (1971-11-01), Smith
patent: 3683253 (1972-08-01), Rummel et al.
patent: 3818291 (1974-06-01), Miyake
patent: 3843912 (1974-10-01), Anderson

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