PWM & PAM control strategy for five-level double converter
PWM & PAM control strategy for five-level double converter
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脉宽调制
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
K. Sasagawa
中科院分区：
文献类型：
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作者：
S. Tsujishima;T. Ishida;K. Matsuse;K. Sasagawa
本研究所采用的三相五电平双变流器，是由一个三相五电平整流器与一个三相五电平逆变器连接而成。五电平整流器将交流电源功率转换为直流功率，然后五电平逆变器将直流功率转换为变压和变频的交流输出功率。该变换器可用于电动机的调速驱动。提出了三相五电平双变流器的PWM & PAM控制策略。PWM & PAM控制策略执行如下操作。在低电机转速区域，整流器将直流电压固定在低值，逆变器输出脉宽调制（PWM）波形。在高速区域，整流器与速度成比例地调节直流电压，逆变器输出脉冲幅度调制（PAM）波形。这种策略可以减少逆变器电路中开关器件处产生的损耗和逆变器输出电流波形的谐波失真。
A three-phase five-level double converter, which we use in this study, consists of connecting a three-phase five-level rectifier and a three-phase five-level inverter. The five-level rectifier converts AC source power to DC power, and then the five-level inverter converts the DC power to variable-voltage and variable-frequency AC output power. The converter may help adjustable-speed drive of motors. We propose the PWM & PAM control strategy for the three-phase five-level double converter. The PWM & PAM control strategy carries out the operation as follows. In low motor speed areas, the rectifier fixes DC voltage at low value and the inverter outputs pulse width modulation (PWM) waveforms. In high speed areas, the rectifier adjusts DC voltage in proportion to the speed and the inverter outputs pulse amplitude modulation (PAM) waveforms. This strategy can reduce the generated losses at switching devices in the inverter circuit and the harmonic distortion of the inverter output current waveform.