Controlling method for rectifier

Abstract

Abstract PURPOSE:To reduce the harmonic component of a polyphase AC input current and to obtain a constant DC output having small ripple by controlling the conducting time of switching elements by a specific method so that the polyphase AC input current flows in the sinusoidal waveform. CONSTITUTION:A 3-phase AC input is applied through inductors Lu-Lw, capacitors, Cu-Cw and rectifiers Rec1-Rec3 to converters G1-G3, and the outputs are applied through smoothing circuits to a load F. Switching transistors Q1, Q'1 in the converters G1-G3 are respectively switched in high conversion frequency by the frequency of 3-phase AC. The energy produced at the output side at every period of the conversion frequency is controlled to be proportional to the product of the square of the 3-phase AC and the control amount, and proportional in the total energy produced from the respective phases to the control amount.

Inventors

• 👤 Ryoji Saito
• 👤 斉藤　亮治
• 👤 Yoshio Suzuki
• 👤 義雄 鈴木
• 👤 Kazuhiro Senoo
• 👤 妹尾　一宏

Bibliographic Details