Circuit arrangement for controlling the alternating current thro

Details Circuit arrangement for controlling the alternating current thro Circuit arrangement for controlling the alternating current thro

1988-11-01

1990-04-03

Zazworsky, John

Electrical transmission or interconnection systems

With nonswitching means responsive to external nonelectrical...

Temperature responsive

323324, 323325, H03K 1772

Patent

active

049143271

ABSTRACT:
A circuit for controlling an AC current through a load. The load, e.g. a motor (3), is connected in series with a first triac (7) between two terminals (1, 2) adapted for connection to an AC supply voltage. A series circuit of a capacitor (6) and a parallel circuit consisting of a first (14) and a second (5) resistor is connected parallel to the first triac. The control electrode of the first triac is connected to the capacitor by means of a series circuit of a third resistor (9) and a second triac (10). A control electrode of the second triac is connected to the capacitor by means of a diac (8).

REFERENCES:
patent: 3484623 (1969-12-01), Cain
patent: 3619656 (1971-11-01), Domke
patent: 3729651 (1973-04-01), Fricker et al.
patent: 3798470 (1974-03-01), Burns et al.
patent: 4069446 (1978-01-01), Yonehara
patent: 4353025 (1982-10-01), Dobkin

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