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标题：一种计及母线电容电压不平衡的四开关SPWM算法 |
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作者：李伟，高强 |
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| 2018年第2期 访问次数：360次 |
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摘要：在深入分析四开关逆变器SPWM原理的前提下，指出了直流母线电压不平衡对电机运行的影响，提出了一种有效的补偿办法。建立了永磁同步电机的数学模型，并在此基础上搭建了转速、电流双闭环PMSM矢量控制系统的仿真模型。仿真结果表明，这种SPWM控制策略能够对永磁同步电机进行高效控制，系统具有良好的动静态性能。
关键词：四开关逆变器；SPWM；电容电压不平衡
Abstract: Based on the analysis of the principle of an SPWM for the fourswitch inverter , the effect of the DClink voltage unbalance on the motor was pointed out and an effective compensation method was proposed. The mathematical model of a permanent magnet synchronous motor(PMSM) was established and a simulation model of the PMSM vector control system with speed and current loops was built. The simulation results verify that the PMSM can be effectively controlled with the proposed SPWM control algorithm, and the system has good dynamic and static performance．
Key words: fourswitch inverter; SPWM; capacitor voltage unbalance
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