Power converter with current-type inverter
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United States of America Patent
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Oct 13, 1992
Grant Date -
N/A
app pub date -
Mar 8, 1990
filing date -
Mar 13, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A power converter comprising a current-type inverter is disclosed, in which an output of a converter unit is applied as an input to the inverter unit through a DC reactor, and AC power is supplied to a load from the inverter unit. A ripple component of the DC input of the inverter unit is detected, and the switching elements of the inverter unit are controlled by modulation rate if they are to be subjected to PWM control, thus completing a sinusoidal waveform of the output of the inverter unit. Specifically, since the input to the inverter unit is allowed to contain a ripple, the DC reactor is reduced in size. The output of the inverter unit is a sinusoidal AC power containing no high harmonics and therefore the load is free of effects of high harmonics.
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