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脉冲宽度调制系统中开关器件的导通或开断,可引起系统结构或参数的变化。本文探讨了这类系统的状态空间分析法,给出系统的稳态状态空间描述和调宽过程中系统的扰动方程,导出了方程的稳态解,讨论了系统的工作性质。并以多脉冲选加调制UPS系统为例,分析了多脉冲调制逆变器的各种工作状态,对系统输出端各状态运动过程进行了计算机辅助分析,理论计算结果与实际情况相符。本方法为多脉冲宽度调制系统的机助分析与设计,以及计算机控制提供了理论工具。
Switching device in pulse width modulation system on or off, can cause changes in system structure or parameters. In this paper, the state space analysis of such systems is discussed. The steady-state state space description and system perturbation equations of the system are given. The steady-state solutions of the equations are derived. The working properties of the system are discussed. Taking multi-pulse selective modulation UPS system as an example, various working states of multi-pulse modulation inverter are analyzed. Computer aided analysis is made on the movement of each state at the output of the system. The theoretical calculation results are consistent with the actual situation. The method provides a theoretical tool for machine-assisted analysis and design of multi-pulse width modulation system and computer control.