Power converter control apparatus for controlling commutation of switching devices under transient conditions
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United States of America Patent
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Feb 10, 1998
Grant Date -
N/A
app pub date -
Aug 3, 1995
filing date -
Nov 2, 1994
priority date (Note) -
Expired
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Abstract
A power converter controlling apparatus outputs voltage signals different in phase from phases of commutation voltages of each switching device by 90 degrees to transform the voltage signals and the commutation voltages in conformity with polar coordinate transformation, and outputs amplitudes of the commutation voltages and the phase differences of the commutation voltages to a reference phase based on the results of the transformation to operate phase-control angles of each switching device on the amplitudes and the phase differences.
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