【摘要】 对于传统得三相三桥臂逆变电源,当三相负载不对称时,负载中性点电位将会发生漂移,输出三相相电压不再对称,使得负载不能正常工作。三相四桥臂逆变电源,在三相三桥臂的基础上增加一个桥臂作为三相负载的中性点,通过对四个桥臂上下开关的状态进行控制,实现输出三相对称且稳定的相电压。文章主要分析了三相四桥臂逆变器主电路的拓扑结构,在探讨三维空间矢量算法的基础上实现了仿真。仿真结果表明该方案可获得良好的控制特性。更多还原

【Abstract】 In traditional 3-phase 3-leg inverter, when the load in each phase is unbalanced, the neutral point potential will shift and the output voltage in phase is unbalanced, so the load can not operate in normal. While in 3-phase 4-leg inverter, which add an additional neutral leg as the neutral point, can output balanced phase voltage by controlling the forth leg on-off time. This paper analyzes the main circuit’s topology and svpwm arithmetic. The simulation verifies the solution with good control performance.更多还原