AC power control apparatus

Details AC power control apparatus AC power control apparatus

1987-06-05

1989-09-19

Wong, Peter S.

Electricity: power supply or regulation systems

External or operator controlled

Phase controlled switching using electronic tube or a three...

323238, H02J 300

Patent

active

048684864

ABSTRACT:
An AC power control apparatus including a power circuit for supplying an AC current to a load, and a circuit connected to a power supply, for initiating energization of the load at a zero-cross point of an AC current waveform. A control circuit for controlling the change of energization time between a current turn on time to a current turn off time in units of AC waveform cycles, and a detector for detecting an AC zero level. From a given polarity of the AC current waveform, the initiating energization of the load and deenergization of the load at a zero-cross point of the AC current waveform is from the same polarity as the given polarity of the AC current waveform.

REFERENCES:
patent: 3363143 (1968-01-01), Cavanaugh
patent: 3702941 (1972-11-01), Aiduck et al.
patent: 4287465 (1981-09-01), Sherman
patent: 4334147 (1982-06-01), Payne
patent: 4344121 (1982-08-01), Weber
patent: 4600877 (1986-07-01), Soderholm
patent: 4665458 (1987-05-01), Matsuoka et al.
Peterson, IBM Technical Disclosure Bulletin, "Temperature Control Circuit", 10/65, pp. 808-809.

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