Circuit arrangement for limiting the current to be switched of a

Details Circuit arrangement for limiting the current to be switched of a Circuit arrangement for limiting the current to be switched of a

1995-05-01

1997-09-16

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Utilizing three or more electrode solid-state device

327324, 327380, 327396, 327452, 323320, 323321, 323323, H03K 17725

Patent

active

056684967

ABSTRACT:
A circuit arrangement for limiting the current to be switched of an electrical load, with the power input of the electrical load being controlled by means of a Triac, said Triac being connected in series with the electrical load, with a Diac being connected to the gate terminal of the Triac, said Diac being connected in series with a resistor arrangement whose resistance value is variable for the purpose of controlling the Triac, said Triac being disconnectible from the power supply by means of a first switch, wherein a second switch is provided by means of which the series arrangement comprised of the resistor arrangement and the Diac is disconnectible from the power supply, and wherein, on turning the electrical load on, the first switch is closed first, while the second switch is closed with a time delay. Advantageously, on turning the electrical load off, the second switch is opened first, while opening of the first switch occurs with a time delay.

REFERENCES:
patent: 4422030 (1983-12-01), McAllise
patent: 4468604 (1984-08-01), Zaderej
patent: 4591781 (1986-05-01), Larson
patent: 4651077 (1987-03-01), Woyski
patent: 4703248 (1987-10-01), Kuhnemundt et al.
patent: 4761601 (1988-08-01), Zaderej
patent: 4935691 (1990-06-01), Lamar
patent: 5019770 (1991-05-01), Harada et al.
patent: 5430637 (1995-07-01), Buck

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