Patent · US Expired

Method and circuit for sequentially connecting plural loads to an a.c. voltage without damaging the low voltage control circuitry therefor

US5256905A · kind A · utility

5Cited by

9References

20Claims

0Family size

Assignees

Inventors

Ralf-Jurgen Striek · Berlin, DE
Peter Muller · Neuhausen, CH

Key dates

Filing date	Dec 21, 1990
Grant date	Oct 26, 1993
Priority date	—
Expiry date	Dec 21, 2010

Classification

Technology area (CPC H)Electricity
CPC primaryH02M5/2576
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.