Method in connection with converter bridges

Details Method in connection with converter bridges Method in connection with converter bridges

2005-02-22

2005-02-22

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

Having plural converters for single conversion

Reexamination Certificate

active

06859374

ABSTRACT:
A method in connection with converter bridges connected in parallel, whereby the converter bridges are directly connected in parallel and the converter bridges are controlled independently on the basis of control variables, the method comprising the steps of controlling the converter bridges to produce an output switching vector on the basis of the control variables, determining the magnitude of a common-mode current component of the converter bridges, and selecting a zero vector to be used during control as a switching vector on the basis of the sign of the common-mode current component to minimize common-mode current of the converter bridges.

REFERENCES:
patent: 5657217 (1997-08-01), Watanabe et al.
Ogasawara, Satoshi et al.,A Novel Control Scheme of a Parallel Current-Controlled PWM Inverter, IEEE Transactions on Industry Appln., vol. 28, No. 5, Sep./Oct. 1992, pp. 1023-1030.
Ye, Zhihong et al.,Control of Circulating Current in Parallel Three-Phase Boost Rectifiers, Center for Power Electronics Systems (CPES), Virginia Polytechnic Institute and State University, pp. 506-512.

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