Pulse based dead time compensator for PWM voltage inverters
Pulse based dead time compensator for PWM voltage inverters
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DOI：
10.1109/iecon.1995.483455
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发表时间：
1995-11
期刊：
影响因子：
--
通讯作者：
D. Leggate;Russel J. Kerkman
中科院分区：
文献类型：
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作者：
D. Leggate;Russel J. Kerkman
交流驱动器的脉宽调制 (PWM) 电压逆变器中防止电源短路所需的死区时间会导致输出电压偏差。尽管单个电压偏差很小，但当在一个工作周期内累积时，电压偏差足以使所施加的 PWM 信号失真。本文提出了一种校正死区时间偏差的新方法。与其他死区时间补偿方法相比，基于脉冲的补偿器的硬件和软件密集程度较低，可提供低成本解决方案。基于脉冲的技术是通过分析死区时间对逐个脉冲的影响并相应地校正每个脉冲而开发的。通过模拟和实验结果对该技术进行了评估。对其他补偿方法进行了评估，并将结果与基于脉冲的技术进行了比较。该比较表明，以前的方法会在所施加的端子电压中产生幅度和相位误差，而所提出的方法补偿死区时间，而不会在 PWM 电压源逆变器的端子电压中产生显着的幅度和相位误差。
The dead time necessary to prevent the short circuit of the power supply in pulse width modulated (PWM) voltage inverters for AC drives results in output voltage deviations. Although individually small, when accumulated over an operating cycle, the voltage deviations are sufficient to distort the applied PWM signal. This paper presents a new method to correct for the dead time deviations. The pulse based compensator is less hardware and software intensive than other dead time compensation methods providing a low cost solution. The pulse based technique is developed by analyzing the effects of dead time on a pulse by pulse basis and correcting each pulse accordingly. The technique is evaluated through simulation and experimental results. Other compensation methods are evaluated and the results compared with the pulse based technique. This comparison indicates previous methods can produce magnitude and phase errors in the applied terminal voltage, whereas the proposed method compensates for the dead time without significant magnitude and phase errors in the terminal voltage of PWM voltage source inverters.