PWMコンバータにおける電源電圧センサレス制御法 [in Japanese] Source Voltage Sensor-less Digital Control Using Observer for PWM Converter [in Japanese]
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For promotion of low-priced and reliable PWM converters, it is important to decrease the number of parts which comprise a PWM converter. The proposed control method realizes an integrated control circuit using inexpensive DSP (Digital Signal Processor) to offer unity input power factor without a source voltage sensor. In the method, an observer estimates voltage instead of sensing it. Then, the phase-angle error between the estimated voltage wave and a sine wave generating input current command is made zero by a phase controller based on the Fourier series. The stability of the system is shown by the Popov's method. Experiments demonstrate the system achieves sinusoidal input current and unity power factor.
- IEEJ Transactions on Sensors and Micromachines
IEEJ Transactions on Sensors and Micromachines 117(3), 314-320, 1997-03
The Institute of Electrical Engineers of Japan