自走マルチによる正弦波PWM変調方式

概要

論文の詳細を見る
The sinusoidal PWM inverter has been widely used for various power applications. In many case, a wide range of the frequency variations is requested. For this purpose the so-called subharmonic method in generally used. In this method, the instantaneous amplitudes of the reference signal of sinusoidal shape is compared to a carrier signal of a triangular shape in the control circuit. Therefore, continuous synchronization between the carrier signal and the reference signal can be not easily achieved. In this paper, a PWM technique using the principles of the relay-mode multiviblator is proposed. In this technique, a comparator with a hysteresis is driven by the error signal between the sinusoidal reference and the negative feedback signal through the low-pass filter, and PWM signal is obtained without the carrier signal. This circuit is simple, of wide range of frequency and of low harmonic content. Harmonic analysis is given on PWM waveform produced by this technique, and relations between the circuit parameters and harmonic components are investigated.
長崎大学工学部の論文
1982-08-00