Chopper control apparatus

Details Chopper control apparatus Chopper control apparatus

1982-06-03

1985-01-01

Smith, Jerry

Boots, shoes, and leggings

364184, 364400, 318338, 318345C, 318345G, 318341, H02P 506

Patent

active

044919042

ABSTRACT:
A chopper control apparatus comprises a chopper connected between a d.c. power supply source and a load, and a computer for performing an arithmetic operation for controlling the duty factor of the chopper. The computer responds to a clock signal supplied thereto at a predetermined period and arithmetically determines a desired duty factor of the chopper for every period. A turn-on signal generated in synchronism with the clock signal and a turn-off signal generated with a delay of period of time based on the results of the arithmetic operation are sequentially supplied to the chopper. The conducting state of the chopper is detected and the result of the detection is fetched by the computer with a predetermined time delay. The computer executes a program for determining presence or absence of a commutation failure on the basis of the result of the conducting state detection in response to the clock signal serving as an interrupt request signal.

REFERENCES:
patent: 4025836 (1977-05-01), Naito et al.
patent: 4209733 (1980-06-01), Narita et al.
patent: 4282465 (1981-08-01), Acker et al.
patent: 4284934 (1981-08-01), Narita et al.
patent: 4381479 (1983-04-01), Wesling et al.

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