DSP-based real time output waveform synthesis for three-phase PWM inverter
DSP-based real time output waveform synthesis for three-phase PWM inverter
复制标题
基于DSP的三相PWM逆变器实时输出波形合成
DOI：
10.1002/eej.4391110609
复制
发表时间：
1991
影响因子：
0.4
通讯作者：
A. Kawamura
中科院分区：
文献类型：
--
作者：
K. Ishihara;A. Kawamura
提出了一种新的数字控制技术来合成任意三相PWM逆变器输出。感应两个线对线电压，无差拍响应所需的脉冲模式由观测器在18 kHz采样频率下基于预测电压以实时方式计算。当用于不间断电源时，这种闭环电压控制固有地导致非常低的THD和非常快的暂态响应，并且具有较小的滤波容量。此外，在采用重复补偿器的情况下，该方案在改善非线性负载的输出波形方面具有优势。文中介绍了建模方法、理论分析、仿真和实验结果。
A new digital control technique is proposed to synthesize an arbitrary three-phase PWM inverter output. Sensing two line-to-line voltages, the required pulse patterns for deadbeat response are computed in a real time manner based on the predicted voltage by an observer at 18-kHz sampling frequency. When used for the uninterruptible power supply, this closed-loop voltage control inherently results in a very low THD and a very quick transient response with less filter capacity. Also, with the repetitive compensator, the proposed scheme has advantages in improving the output waveform for nonlinear load. This paper describes the modeling technique, theoretical analysis, simulations and experimental results.