Research on Differential Mode Interference in the PWM Variable Frequency Drive System

PWM inverter can improve the performance of system,but the differential mode interference brings about much problem.At present,the method for interference suppression is electromagnetic interference(EMI) filter.However before designing the filter,the system interference distributed regulation must be exactly known.So interference separation network is used for researching the differential mode interference distribution of PWM variable frequency drive system,the influence and choke measure are analysed.