Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1987-02-10
1988-06-21
Salce, Patrick R.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363 28, 363 96, 42218616, H02M 7521
Patent
active
047528664
ABSTRACT:
A versatile current source inverter power supply for an ozonator in which a gating control circuit controls the gating of a thyristor bridge inverter power supply in a manner in which the output current to the ozonator is controlled and regulated. The current source inverter power supply circuit includes a DC/AC thyristor bridge inverter circuit coupled at its input terminals to a direct current power source and at its output terminals to an electrical network which includes the capacitative ozonator load. The thyristor bridge inverter includes a first pair of thyristors and diodes coupled to conduct current in a first direction through the electrical network, and a second pair of thyristors and diodes coupled to conduct current in a second, opposite direction through the electrical network. The electrical network includes a step up high voltage transformer, with its primary winding coupled to the thyristor bridge inverter and its secondary winding coupled to the ozonator load. First and second commutating capacitors are connected across the first and second pairs of thyristors for commutating off the thyristors. An adjustable current pulse amplitude conrol circuit is provided for controlling the amplitude of current pulses supplied through the thyristor bridge to the ozonator load.
REFERENCES:
patent: 3496092 (1970-02-01), Fraser
patent: 3737755 (1973-06-01), Calkin et al.
patent: 4251857 (1981-02-01), Shelly
Bixby et al., "SCR Applications Handbook"; International Rectifier; Chapter 8 or pp. 283-309.
Huynh Anh N.
Ziogas Phoivos D.
Baracka Gerald A.
National Distillers and Chemical Corporation
Salce Patrick R.
Sterrett Jeffrey
Tremain Kenneth D.
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