| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a DC/AC inverter unit that can continuously support medical action or the like involved in human life while eliminating the risk of the breaking of an AC 100V output to the utmost even when an abnormality occurs. <P>SOLUTION: The DC/AC inverter unit 1 that is fed with a direct current from a battery 2 and outputs a commercial alternate current to a load 3 is constituted by parallel-connecting a first inverter unit 4a and a second inverter unit 4b. Each of the first and second inverter units 4a, 4b converts the direct current to the alternate current by a PWM signal generated by using a reference sine wave flowing in a reference sine wave signal line L<SB>s</SB>. An alternate current of the same waveform, the same phase and the same frequency outputted from each of the first and second inverter units 4a, 4b, are composed and fed to the load 3. By this constitution, even if either of the inverter units is inoperative, the other inverter unit can continue to feed the same waveform alternate current to the load 3. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
