| 摘要 |
<P>PROBLEM TO BE SOLVED: To check the operation of only a unit cell by charging only the DC capacitor of a specified unit cell in a cascade converter in which unit cells such as a bidirectional chopper and a full bridge are connected to a cascade. <P>SOLUTION: In the cascade converter in which a unit cell composed of a bidirectional chopper circuit, etc. is cascade connected, a variable power source is connected to a DC link, and besides it includes a means for switching on the lower arm IGBTs of the unit cells excluding the unit cell selected at initial charge. <P>COPYRIGHT: (C)2011,JPO&INPIT |
