Method and circuit for sequentially connecting plural loads to a

Details Method and circuit for sequentially connecting plural loads to a Method and circuit for sequentially connecting plural loads to a

1990-12-21

1993-10-26

Gaffin, Jeffrey A.

Electrical transmission or interconnection systems

Plural load circuit systems

Control of current or power

318599, 307 31, H02P 318

Patent

active

052569055

ABSTRACT:
In an appliance having a relatively low voltage control section controlling one or more AC power loads through switch devices such as triacs, the triacs are gated sequentially within each half cycle such that the peak load on the low voltage control circuitry caused by gating the plural triacs is equal to the load created by gating only a single triac. Distribution of the gating of plural triacs is accomplished through the use of a timing circuit or microprocessor, or RC timing circuits having differing time constants.

REFERENCES:
patent: 3740585 (1973-06-01), Squiers
patent: 3940669 (1976-02-01), Tsuboi et al.
patent: 3980943 (1976-09-01), Cailleux et al.
patent: 4300077 (1981-11-01), Katz et al.
patent: 4511836 (1985-04-01), Eriksson
patent: 4585983 (1986-04-01), Cooper et al.
patent: 4683415 (1987-07-01), Zimmerman
patent: 4689548 (1987-08-01), Mechlenburg
patent: 4736148 (1988-04-01), Hirata

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