H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/34
H02M 7/217 (2006.01) H02M 7/525 (2006.01)
Patent
CA 1182166
INVERTER WITH IMPROVED POWER FACTOR CONTROL Abstract of Disclosure There is provided an improvement in a power inverter for converting D.C. voltage into an alternating voltage by alternat- ing gating D.C. current across a load. This type of inverter employs a gating circuit for providing gating signals in two sets of switches at a frequency which controls the power factor of the voltage and current applied to the load, means for detect- ing the power factor, means for comparing the detected power factor with a reference signal indicative of a desired operating power factor and means for adjusting the frequency in accordance with the comparison whereby the power factor tends to be at the desired power factor level. The improvement in this type of in- verter is the provision of means for changing the reference signal during the operation of the inverter in accordance with a control signal so that the desired power factor can be changed during start up of the inverter.
401671
Gowling Lafleur Henderson Llp
Park-Ohio Industries Inc.
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