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针对应用Matlab/Simulink/PSB对交-直-交变频器建模仿真存在运算量大,耗时长的问题,提出了一种适合于控制系统分析设计的简化高效的基于SPWM变频器系统模型。首先详细推导了基于通用模块的变频器开关函数模型;然后提出一种代替SPWM脉宽调制环节的等效方法,组成了变频器系统的简化模型,并分析了基于简化模型设计控制系统的有效性;最后通过仿真进行验证。结果表明简化模型保持了原模型的外部特性而实际用时显著缩短,适合于控制技术研究的仿真应用。
For the application of Matlab / Simulink / PSB, the modeling and simulation of AC-DC-AC inverter has the problems of high computational complexity and time-consuming, and a simplified and highly efficient SPWM inverter system model is proposed for control system analysis and design. Firstly, the switch function model of inverter based on universal module is deduced in detail. Then an equivalent method to replace SPWM pulse width modulation is proposed to form a simplified model of inverter system. The effectiveness of the control system based on the simplified model is analyzed Finally, the simulation is used to verify. The results show that the simplified model retains the original model of the external characteristics of the actual use of significantly shortened, suitable for control technology research simulation applications.