变频器谐波对电机效率的影响分析

随着变频调速系统在电力系统的广泠应用,为降低谐波对调速系统的影响。首先从理论上分析了目前调速系统中广泛使用的PWM调制方式的电压型变频器输出中可能存在的电压和电流谐波分量,并利用Matlab的Powersys库研究了PWM调制方式下的电压型变频器输出的各种谐波含量,并通过实例验证谐波对电机效率的影响。对变频调速系统中电机及变频器的选型提供一定的理论参考。

Converter Harmonic Analysis on the Motor Efficienly

Frequency inverter output harmonic content and the type of motor windings connected mode converter control method,as well as the motor operation mode and other factors.The inverter's output contains a wealth of harmonic.Inverter output harmonics that it might be even harmonic,these may be odd harmonic,which harmonics different effects on the motor.In this paper,examples from the motor efficiency indicators shows the presencee of harmonics of motor effects.