【摘要】 建立电压型PWM逆变器输出电压的数学模型,分析其谐波分布规律,以改善PWM逆变器输出波形质量,抑制谐波污染.针对电压型PWM逆变器建立了基于SHEPWM的数学模型,根据特定消谐技术求解非线性方程组,采用同伦算法获得开关角数据,以保证特定消谐方程组的解在大范围内快速收敛.仿真结果证明了该方案的可行性.更多还原

【Abstract】 In order to improve the quality of output waveform and suppress harmonic pollution of voltage type PWM inverter,the mathematical model of the output voltage of the voltage type PWM inverter is established and the harmonic distribution law is analyzed.The voltage type PWM inverter mathematical model was established based on SHEPWM,according to the specific harmonic elimination technique for solving nonlinear equations,switch angle data is obtained by using homotopy algorithm,which can guarantee fast convergence in a wide range of solutions of harmonic elimination equations.The simulation results prove the feasibility of this scheme.更多还原