Parallel inverter system

Details Parallel inverter system Parallel inverter system

1991-12-18

1993-05-18

Stephan, Steven L.

Electric power conversion systems

Current conversion

Having plural converters for single conversion

363 65, H02M 700

Patent

active

052126307

ABSTRACT:
A parallel inverter system has a plurality of AC output inverters of an instantaneous voltage control type, a bus for connecting outputs of the inverters to a load so as to share the load current, a detection circuit for detecting a cross current component in a current flowing among the inverters, and an instantaneous voltage control circuit for controlling the output voltages of the inverters. In response to a signal in accordance with the detected cross current component from the detection circuit, the voltage control circuit inserts a virtual impedance between the inverters so as to suppress cross current.

REFERENCES:
patent: 4276590 (1981-06-01), Hansel et al.
patent: 4677535 (1987-06-01), Kawabata et al.
patent: 4802079 (1989-01-01), Mizoguchi
patent: 4947310 (1990-08-01), Kawabata et al.
patent: 5038265 (1991-08-01), Paladel
patent: 5047909 (1991-09-01), Hosoda
"Parallel Operation of Voltage Source Inverter" Conference Record of the 1986 I.A.S. Annual Meeting; pp. 542-548; presented Sep. 28-Oct. 3, 1986.

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