Power converter employing pulse width modulation control

Details Power converter employing pulse width modulation control Power converter employing pulse width modulation control

2005-06-07

2005-06-07

Sherry, Michael (Department: 2838)

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

C363S041000

Reexamination Certificate

active

06903948

ABSTRACT:
A power converter includes a first sampling device5which samples a first command current value for a power conversion device2during a second cycle and produces a second command current value; a second sampling device6which samples a first detected current value pertaining to a load3and produces a second detected current value; a command voltage value calculator9for calculating a command voltage value from the second command current value and the second detected current value; a comparator11for comparing the second command voltage value with a triangular wave carrier signal, to thereby produce a first pulse width modulation (PWM) signal; and a multi-pulse prevention device12. The multi-pulse prevention device12has inversion detection device for detecting inversion of the first PWM signal, and inversion inhibition device for driving the power conversion device2through use of a second PWM signal which prevents inversion of the first PWM signal, on the basis of a result of detecting operation performed by the inversion detection device.

REFERENCES:
patent: 4689543 (1987-08-01), Hucker
patent: 4891744 (1990-01-01), Yamamoto et al.
patent: 9-154283 (1997-06-01), None
patent: 10-42569 (1998-02-01), None

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