Direct power control of {PWM} converter without power source voltage sensors

  • Noguchi T
  • Tomiki H
  • Kondo S
 et al. 
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This paper proposes a novel control strategy of a PWM converter with
no power source voltage sensors. The strategy has two features to
improve a total power factor including harmonic components without
detecting the voltages. One is an estimation technique of the power
source voltages, which can estimate instantaneous values of the voltages
by evaluating instantaneous active and reactive power according to
every switching mode of the converter. The other is a direct instantaneous
power control technique, which can directly control the instantaneous
active and reactive power by using switching modes as manipulated
values for the converter. A DSP based experimental system was developed,
and experimental tests were conducted. The control period of the
system was only 15 μs. It was confirmed that the maximum total power
factor was more than 99%, and the maximum efficiency was 96.2%.
The results have proven excellent performance of the proposed system

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  • T Noguchi

  • H Tomiki

  • S Kondo

  • I Takahashi

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