| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress the harmonic of a zero-phase component included in an output voltage in a multiple inverter, where the output transducer of even number of inverters are star-connected for multiplexing. <P>SOLUTION: The unit inverters 31, 32, 33, 34 are multiplexed by star-connecting the output transducers T<SB>u1</SB>-T<SB>u4</SB>, T<SB>v1</SB>-T<SB>v4</SB>, and T<SB>w1</SB>-T<SB>w4</SB>. The unit inverters 31, 32 for composing a first group of inverters are driven by a gate signal generation section 20 so that the phase difference between the fundamental waves of an output voltage becomes 60 degrees. The unit inverters 33, 34 for composing a second group of inverters are driven by the gate signal generation section 20 so that the phase difference between the fundamental waves of the output voltage becomes 60 degrees. The gate signal generation section 20 is subjected to one-pulse control or pulse width modulation control by a control section 10 for giving a gate signal to a semiconductor switch for composing the unit inverters 31, 32, 33, 34. <P>COPYRIGHT: (C)2008,JPO&INPIT |
