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滞环控制的PWM变换器是强非线性环节,难以通过优化控制和常规线性化处理来提高电流控制质量.为此,分析了滞环电流控制原理、谐波线性化方法及系统稳定性,得到了滞环电流控制传递函数模型,时滞和环宽与其他参数的一般关系以及系统自振荡频率的计算方法.根据滞环电流控制的特点,提出了将谐波线性化方法与ITAE优化控制律相结合的方法,以实现对PWM变换器的优化控制.Matlab仿真结果表明了所提出方法的有效性.
The hysteresis loop control PWM converter is a strong non-linear link, it is difficult to improve the current control quality by optimizing the control and conventional linearization processing.Therefore, the control principle of hysteresis current, harmonic linearization method and system stability are analyzed, The general relationship between hysteresis loop and ring width and other parameters and the method to calculate the self-oscillation frequency of hysteresis current control are presented.According to the characteristics of hysteresis current control, the harmonic linearization method and ITAE optimal control law The method of combining to achieve the optimal control of PWM converter.Matlab simulation results show the effectiveness of the proposed method.