Applied voltage detecting device for electric power convertor

Details Applied voltage detecting device for electric power convertor Applied voltage detecting device for electric power convertor

1985-05-28

1986-12-30

Salce, Patrick R.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

307252R, H02H 7125

Patent

active

046333800

ABSTRACT:
An applied voltage detecting device for an electric power convertor is disclosed which detects a forward voltage and a backward voltage applied to a power convertor consisting of a semiconductor power control rectification element.
The forward and backward voltages are detected by a detecting circuit while a relative potential difference is being provided to these voltages. The voltages detected by the detecting circuit are converted to optical signals and are picked up by a single optical transmission circuit. The optical signal is again converted to the electric signal by a discrimination circuit, which discriminates whether the signal is the forward detection voltage or the backward detection voltage from the potential difference between them.
The present invention can simplify the detecting device because both forward and backward voltages can be detected by the single optical transmission circuit.

REFERENCES:
patent: 4100434 (1978-07-01), Iyotani et al.
patent: 4313156 (1982-01-01), Kobayashi et al.
patent: 4320445 (1982-03-01), Kobayashi et al.
patent: 4536816 (1985-08-01), Matsumara et al.
"Performance of High Voltage Light-Triggered Thyristor Valve", IEEE, vol. PAS-102, No. 7, Aug. 1983.

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