Power supply unit for a plasma plant

Details Power supply unit for a plasma plant Power supply unit for a plasma plant

1978-04-10

1980-09-23

Shoop, William M.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 45, H02M 7155

Patent

active

042246628

ABSTRACT:
A power supply unit for a plasma plant, in particular for a plasma spraying plant, comprises an isolating transformer for connection to three-phase mains, a current control array and a rectifier array. The rectifier array comprises silicon wafer thyristors in a three-phase bridge configuration, which thyristors are electronically controlled through a current control loop, and an exterior voltage control loop is provided for additional electronic control of the silicon wafer thyristors.
In the output from the thyristor array, a filter with a transient voltage suppressor may be provided as high-frequency protection and with di/dt limitation.

REFERENCES:
patent: 3465234 (1969-09-01), Phadke
patent: 3467848 (1969-09-01), Ainsworth
patent: 3683262 (1972-08-01), Neusser et al.
patent: 3792340 (1974-02-01), Sheinkman et al.
patent: 3832620 (1974-08-01), Pollard
The Marconi Review, First Quarter 1962, "Special Stabilized Power Supplies", p. 81.

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