AC-AC converter using switches in a DC link

Details AC-AC converter using switches in a DC link AC-AC converter using switches in a DC link

1988-12-05

1990-01-16

Wong, Peter S.

Electric power conversion systems

Current conversion

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

363 37, 318803, H02J 336

Patent

active

048947636

ABSTRACT:
A power conversion system for converting polyphase AC power at a first frequency and voltage to AC power at a second frequency and voltage includes an input rectifier circuit and an output inverter circuit coupled by a DC link or interface comprising solid state devices. The interface includes a reversely-poled diodes connected between selected terminals of the rectifier and inverter circuits for carrying current in a forward direction. Controllable switches interconnect the same terminals for carrying current in a reverse direction to the inverter circuit. A controller responds to instantaneous current at the inverter terminals and to instantaneous input line voltages for selectively energizing the interface switches.

REFERENCES:
patent: 4088934 (1978-05-01), D'Atre et al.
patent: 4375612 (1983-03-01), Wirth
patent: 4670827 (1987-06-01), Schneider
patent: 4788635 (1988-11-01), Heinrich
patent: 4805082 (1989-02-01), Heinrich et al.
Bose, B. K., "Power Electronics and AC Drives", Prentice-Hall, Englewood Cliffs, N.J., 1986, pp. 122-152.

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