New single-phase unity power factor PWM converter-inverter system

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説明

A single-phase, unity power factor converter-inverter is presented for an induction motor drive. The converter circuit, which delivers sinusoidal input current, regulates DC voltage. The inverter, which uses the magnetic flux control PWM (pulse-width-modulation) method, generates a variable-voltage, variable-frequency PWM waveform in order to minimize the output voltage distortion factor. The experimental result shows that the motor efficiency is as high as that of the sinusoidal output voltage. As a result, the system efficiency and the power factor are improved. >

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