发明名称 |
INVERTER DEVICE FOR THREE-PHASE AC MOTOR DRIVING |
摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inverter device for a three-phase AC motor driving capable of continuing operation of the three-phase AC motor even if failure occurs at a semiconductor switching device which constitutes an inverter circuit. <P>SOLUTION: A failed device deciding means 9 is provided for detecting the failure of the plurality of semiconductor switching devices Q1 to Q6 which are included in the inverter circuit 4. When the failed device deciding means 9 decides the presence of the failed semiconductor switching device, a neutral connection switch driving circuit 8 outputs a driving signal for connecting an output point V of an arm circuit 4B including the failed semiconductor switching device Q3 to a neutral point N of DC side to a neutral connection switch circuit 7. Receiving the driving signal, the neutral connection switch circuit 7 closes a normally opened contact SW2 and V-connects an exciting winding of a motor. A PWM controller 10 drives four semiconductor switching devices of two arm circuits which do not include the failed semiconductor switching device by PWM control, thus obtaining three-phase balanced current. <P>COPYRIGHT: (C)2004,JPO |
申请公布号 |
JP2004120883(A) |
申请公布日期 |
2004.04.15 |
申请号 |
JP20020280084 |
申请日期 |
2002.09.25 |
申请人 |
JAPAN SCIENCE & TECHNOLOGY CORP |
发明人 |
SATO YUKIHIKO;YAMATO MASANORI;ARMAN JAYA |
分类号 |
H02M7/48;H02P27/06;H02P27/08 |
主分类号 |
H02M7/48 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|