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Suppression of inverter output harmonic

Using the harmonic characteristics of output voltage of inverter to design an ameliorative filter which can suppress common-mode and differential-mode voltage at the same time. The simulation is done by MATLAB and the results of the simulation show that long cables are allowed to connect inverter and motor for the filter. By altering the parameters of the filter, the overvoltage in the motor can be eliminated, which plays a good role of suppressing output harmonics of the inverter.