| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent respective switch elements of respective phases from being simultaneously switched on/off, in two-phase modulation. <P>SOLUTION: A plurality of non-zero voltage vectors V4, V6 which are continued by being sandwiched by the same zero-voltage vectors Vz<SP>n-2, n-1</SP>, Vz<SP>n-1, n</SP>(=V0) form two-phase modulation patterns together with the zero-voltage vectors. A plurality of non-zero voltage vectors V2, V6 which are continued by being sandwiched by a pair of different zero-voltage vectors Vz<SP>n-1, n</SP>(=V0), Vz<SP>n, n+1</SP>(=V7) each form a one-time on/off-operation per phase in a period from one Vz<SP>n-1, n</SP>to the other Vz<SP>n, n+1</SP>of the pair of zero-voltage vectors. <P>COPYRIGHT: (C)2011,JPO&INPIT |
