Programmable alternating current switch

Details Programmable alternating current switch Programmable alternating current switch

1977-09-30

1978-10-10

Zazworsky, John

Electricity: power supply or regulation systems

Remote sensing

307252F, 307252B, 323 24, 323 34, G05F 304, H03K 1772

Patent

active

041199057

ABSTRACT:
A programmable alternating current switch for connecting an A.C. supply to a load for a controlled fraction of each cycle to thereby control the average power to loads, such as lamps, heaters, motors, etc. A Programmable Unijunction Transistor (PUT) is employed to control the phase angle of the A.C. wave at which a Triac is fired, the Triac continuing to conduct and deliver load current for the remainder of that half-cycle. Coupled between the PUT and the Triac is a Light Activated Silicon Controlled Rectifier (LASCR) and a diode bridge which provides full-wave operation.

REFERENCES:
patent: 3328606 (1967-06-01), Pinckaers
patent: 3524997 (1970-08-01), Harnden, Jr. et al.

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