| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a switching method of an electric power conversion system which suppresses enlargement of a filter circuit without increasing a leakage current and a common mode current in the filter circuit in a switchover or the like of a polarity of a phase where switching is stopped in a two phase modulation. <P>SOLUTION: In the switching method of an electric power conversion system where a filter circuit reducing a leakage current is mounted, the switching method of an embodiment makes an average of an output command of all the phases change gently in the case of switching a state including and not including a phase where switching is stopped, and in the case of switching an electric potential of a phase where switching is stopped. By making the inclination gradual to the extent that a vibration in accordance with a resonance frequency in the filter circuit is suppressed enough, it becomes possible to suppress increase of a common mode current and a leakage current in the filter circuit even in the case where a three phase modulation and a two phase modulation are used together. <P>COPYRIGHT: (C)2012,JPO&INPIT |
