Performance analysis of online dual slope delta modulated PWM inverter
Performance analysis of online dual slope delta modulated PWM inverter
复制标题
在线双斜率Delta调制PWM逆变器性能分析
DOI：
10.1109/iscas.2002.1010836
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Rahimi Yusof
中科院分区：
文献类型：
--
作者：
Ramdan Razali;V. Subbiah;M. A. Choudhury;Rahimi Yusof
增量调制（DM）是一种简单的脉宽调制（PWM）方案，特别适用于需要恒定磁通运行的交流电机驱动器。然而，与传统的正弦PWM相比，调制器具有较差的特性，因此通常不使用。通过允许在线参数变化和同步操作，可以显著减少增量调制器的缺点。本文试图确定三角形调制器的调制参数，它可以在恒定和可变频率的三相电压源逆变器（VSI）的操作，以提高性能的谐波含量和基波电压可用性。提出了一种用微机实现增量调制器的新技术。该方法是新颖的，在这个意义上，它使用一个代数方程来产生PWM脉冲来控制逆变器。实验表明，采用双斜率和双斜率变窗宽操作，可使性能得到改善。
Delta modulation (DM) is a simple pulse width modulation (PWM) scheme especially suitable for AC machine drives where a constant flux operation is desired. However, the modulator has inferior characteristics when compared to conventional sine PWM and therefore it is not normally used. The disadvantages of delta modulators can be significantly reduced by allowing online parameter variation and synchronous operation. This paper attempts to identify the modulation parameters of a delta modulator, which can be varied during constant and variable frequency operation of the three-phase voltage source inverter (VSI) so as to improve the performance in terms of harmonic content and fundamental voltage availability. A new technique of implementing the delta modulator by a microcomputer is proposed. The method is novel in the sense that it uses an algebraic equation to generate the PWM pulses to control the inverter. Experiments, carried out by online microcomputer operation, show that dual slope and dual slope-variable window width operation result in improved performance.