A novel multilevel PWM control scheme of the AC/DC/AC converter for AC drives

ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465) Pub Date : 1999-07-12 DOI:10.1109/ISIE.1999.798715

B. Lin, Hsin-Hung Lu

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引用次数: 10

Abstract

An AC/DC/AC power converter with three-level pulse width modulation is proposed in this paper. A single-phase power factor correction circuit to improve the power quality in the rectifier and a three-level PWM inverter to reduce the harmonic contents of the inverter output voltages are presented. In the rectifier side, the hysteresis current control (HCC) technique for a bridge diode with two power switches is adopted. A control scheme is presented that the line current is driven to follow the reference sinusoidal current which is derived from the DC link voltage regulator, DC capacitor voltage balance compensator and the output power estimator. A three-level PWM technique for a three-phase voltage source inverter is used to reduce the voltage harmonics. The major advantage for using such strategy is that the blocking voltage of each power device is clamping to half of the DC link voltage. The high power factor at the input of the rectifier and the low total harmonic distortion at the output of the inverter are verified by software simulations.

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一种新的交流驱动AC/DC/AC变换器多电平PWM控制方案

本文提出了一种三电平脉宽调制的AC/DC/AC功率变换器。提出了改善整流器电能质量的单相功率因数校正电路和降低逆变器输出电压谐波含量的三电平PWM逆变器。在整流侧，采用带两个电源开关的桥式二极管的磁滞电流控制技术。提出了一种由直流链路稳压器、直流电容电压平衡补偿器和输出功率估计器产生的参考正弦电流驱动线路电流的控制方案。采用三电平PWM技术对三相电压源逆变器进行谐波抑制。使用这种策略的主要优点是，每个电源器件的阻塞电压是箝位到直流链路电压的一半。通过软件仿真验证了整流器输入端的高功率因数和逆变器输出端的低总谐波畸变。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)

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