Power converter apparatus and control method thereof

Details Power converter apparatus and control method thereof Power converter apparatus and control method thereof

1985-10-07

1987-05-05

Salce, Patrick R.

Electric power conversion systems

Current conversion

Having plural converters for single conversion

363 69, H02M 540

Patent

active

046637028

ABSTRACT:
A power converter apparatus has at least two converters CONV1 and CONV2. The DC side of each of the converters CONV1 and CONV2 is connected to a filtering capacitor Cd which serves as a DC power source for a load device LOAD. The AC side of the converter CONV1 is connected to the secondary winding of a first transformer TR1. The AC side of the converter CONV2 is connected to the secondary winding of a second transformer TR2. The primary winding of transformer TR1 is connected in series to the primary winding of transformer TR2. The series circuit of the primary windings of transformers TR1 and TR2 is coupled to an AC power supply SUP via a single AC reactor Ls. A control method of the invention is adapted to the power converter apparatus in which plural PWM converters are used. The phase of a modulating wave (carrier) of one PWM converter differs by a predetermined degree from that of another PWM converter.

REFERENCES:
patent: 3818307 (1974-06-01), Hamilton et al.
patent: 4084220 (1978-04-01), Akamatsu
patent: 4333135 (1982-06-01), Schwarz
patent: 4386394 (1983-05-01), Kocher et al.
IEEE Transaction on Industry Application, vol. IA-16, No. 2; pp. 222-233: Hans Kielgas, Reiner Nill; Mar./Apr., 1980.

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