Pre-charge circuit for aux-comm inverter

Details Pre-charge circuit for aux-comm inverter Pre-charge circuit for aux-comm inverter

1977-11-10

1979-03-27

Shoop, William M.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363138, H02M 545

Patent

active

041469208

ABSTRACT:
An input rectifier supplies d-c energy for an auxiliary-commutated inverter. A logic circuit provides gating signals for the semiconductor switches in the input rectifier circuit and in the inverter circuit. A pre-charge circuit provides an independent path to charge the commutating capacitor in the inverter when the system is energized. The gating signals to the input rectifier are delayed by a predetermined time interval, allowing the commutating capacitor in the inverter to be charged and thus ensure effective commutation when the inverter commences operation.

REFERENCES:
patent: RE27193 (1971-10-01), Risberg
patent: 3207974 (1965-09-01), McMurray
patent: 3219905 (1965-11-01), Davis et al.
patent: 3405346 (1968-10-01), Krauthamer
patent: 3559038 (1971-01-01), Krauthamer

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