Boonpirom Nimit2551-02-252551-02-252550-10-25https://dspace.spu.ac.th/handle/123456789/834This paper aims to improve the system imbalance of the single - switch converters by employing the double -switch converter. The main objective is to analyze the cause of common mode noise generating in case of system imbalance and employing the double-switch converter for the common mode noise reduction. As the results, the ringing voltage and stress voltage of switching device are reduced. Finally, the experimental results in DC motor drive show the effectively improvement both time domain and frequency domain.endouble-switch converter and common mode noise.Article