Circuitry and method of operation for an intermediate-like conve

Details Circuitry and method of operation for an intermediate-like conve Circuitry and method of operation for an intermediate-like conve

1982-09-30

1984-09-11

Shoop, William M.

Electric power conversion systems

Current conversion

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

318807, H02P 1324

Patent

active

044714190

ABSTRACT:
Circuitry for, and method of operating, an intermediate-link converter of the type wherein two controlled antiparallel-connected converters are connected via an intermediate link having an impressed voltage to an inverter having a plurality of addressable switches in a three-phase bridge circuit. The polarity of the intermediate-link current is interrogated 30.degree. after every change of the addressing combination of the switches of the inverter. If the interrogated polarity of the intermediate-link voltage is larger than a desired value by a predetermined amount, the converter which is arranged in the feeding-in direction is switched off and the other converter, which is arranged in the feedback direction is switched on. In this manner, a load connected to the inverter can feedback energy into a supply network via the intermediate link and a converter operating as an inverter.

REFERENCES:
patent: 4158163 (1979-06-01), Eriksen et al.
patent: 4270078 (1981-05-01), Walker et al.
patent: 4274042 (1981-06-01), Walker et al.
patent: 4328454 (1982-05-01), Okuyama et al.
patent: 4366427 (1982-12-01), Walker et al.
"Thyristoren," by Heumann and Stumpe, 3rd Edition, 1974, p. 198.

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