Low interference controlled switching circuit for multiple loads

Details Low interference controlled switching circuit for multiple loads Low interference controlled switching circuit for multiple loads

1991-06-07

1995-02-14

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

307125, H01H 4700

Patent

active

053900715

ABSTRACT:
A power control circuit for at least two ohmic loads includes power semiconductors, switching elements and a control unit for adjusting the power consumption of the loads. In order to comply with international standards to avoid disturbances in mains supply systems when higher loads are switched, a simple and cheap circuit is described which is also suitable for smaller domestic appliances such as light cookers, flat-irons, cooking vessels etc. A control unit controls a switchable power semiconductor unit which can pass current in two directions and connects one or both loads to the single power semiconductor unit via the switching elements in a variety of circuit configurations so as to adjust the power to the loads as required.

REFERENCES:
patent: 4480298 (1984-10-01), Fry
patent: 4906858 (1990-03-01), Gesin
patent: 5006724 (1991-04-01), Liu

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