Inventor-controlled power unit

Details Inventor-controlled power unit Inventor-controlled power unit

1992-06-24

1995-03-21

Stephan, Steven L.

Electric power conversion systems

Current conversion

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

363 56, 363 95, 363131, 363 71, H02M 5458

Patent

active

054002362

ABSTRACT:
An invertor-controlled power unit includes a direct current power source circuit, an invertor circuit, and a pair of output lines. A waveform of voltage appearing between the output lines is detected. There is generated a target output waveform signal having a predetermined frequency. The target output waveform signal is converted into a control signal, which is then supplied to the invertor circuit. The invertor circuit effects switching control of an output from the direct current power source circuit in response to the control signal. There is detected an overvoltage state of the direct current power source circuit. The generation or supply of the control signal is inhibited while there is detected the overvoltage state of the direct current power source circuit. The control signal starts to be supplied again to the invertor circuit at a timing at which the detected waveform of the voltage between the output lines crosses a substantially zero volt level.

REFERENCES:
patent: 4733341 (1988-03-01), Miyazawa
patent: 4876637 (1989-10-01), Mose et al.
patent: 5258700 (1993-11-01), Shimizu et al.
patent: 5282124 (1994-01-01), Nakamura et al.

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