고조파 주입에 의한 PWM 인버터의 출력전압 증대

Output Voltage Increment of a PWM Inverter by The Harmonic Injection Method

A method to increase the output voltage of the PWM inverter within linear range is considered. A new modulation wave is used, which is made by injecting the third harmonic wave into the sinusoidal wave. The optimum region for improving the output voltage keeping the linear control characteristic is obtained by digital simulation. Furthermore, the distortion factor in the optimum region is less than that calculated when the maximum output voltage can be obtained in the sinusoidal PWM inverter.