A general constant-frequency pulsewidth modulator and its applications
A general constant-frequency pulsewidth modulator and its applications
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DOI：
10.1109/81.669061
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发表时间：
1998-04
影响因子：
5.1
通讯作者：
Z. Lai;K. Smedley
中科院分区：
文献类型：
--
作者：
Z. Lai;K. Smedley
恒频脉宽调制（PWM）是开关变换器控制中最常用的方法。本文提出了一种通用的PWM调制器，该调制器可以实现各种后缘调制或前缘调制的控制方案。在此基础上构造了一个通用的双边缘调制器。该调制器应用于一系列变换器的前馈控制、具有线性或非线性补偿斜率的电流模式控制以及一系列连续或不连续导通模式的单位功率因数整流器，以证明其通用性。提供了实验和PSPICE验证。
Constant-frequency pulsewidth modulation (PWM) is the most frequently used method in the control of switching converters. This paper proposes a general PWM modulator that realizes various control schemes with either trailing-edge or leading-edge modulation. Based on that a general double-edge modulator ran be constructed. The proposed modulator is applied to feedforward control of a family of converters, current-mode control with linear or nonlinear compensating slope, and a family of unity-power-factor rectifiers at continuous or discontinuous conduction mode to demonstrate its generality. Experimental and PSPICE verifications are provided.