제어로봇시스템학회:학술대회논문집

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Common-Mode Current Cancellation Scheme of Half-Bridge Switch-Mode Converter for DC Motor Drive

  • Srisawang, Arnon (Control Engineering Department, Faculty of Engineering and Research Center for Communication and Information Technology King Mongkut’s Institute of Technology Ladkrabang Bangkok, Department of Electrical Engineering, Vongchavalitkul University) ;
  • Panaudomsup, Sumit (Control Engineering Department, Faculty of Engineering and Research Center for Communication and Information Technology King Mongkut’s Institute of Technology Ladkrabang Bangkok) ;
  • Prempraneerach, Yothin (Control Engineering Department, Faculty of Engineering and Research Center for Communication and Information Technology King Mongkut’s Institute of Technology Ladkrabang Bangkok)
  • Published : 2003.10.22
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Abstract

Due to the conventional half-bridge switch-mode converters for dc motor drive have been usually using unbalanced circuit topologies which generate common-mode currents through parasitic capacitors distributed between the ground and the dc motor frame such as the heat-sink of switching devices or the frame of the dc motor. This paper describes methods that cancel common-mode current generated in half-bridge switch-mode converters by using circuit balancing technique. The circuit balancing is to make the noise pickup or occurring in both conductor lines, signal and return pathes, is equal in amplitude and opposite in phase so that it will be canceled out in the ground plane. The common-mode current cancellation in the proposed converter is confirmed by experimental results.

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