| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a versatile air conditioning control device capable of surely controlling an input current without applying any change even when a multi-pulse rectifier is connected. <P>SOLUTION: A rectifying circuit 23 rectifies a three-phase AC voltage and applies it to an inverter main circuit 25. The inverter main circuit 25 converts an applied direct current to an alternate current of variable frequency and supplies it to a compressor motor 2 or a blower. The multi-pulse rectifier 30, which includes a transformer for inputting the three-phase AC voltage and outputting the three-phase AC voltage with a different phase by a prescribed angle and an auxiliary rectifying circuit rectifying the three-phase AC voltage output by the transformer and supplying it to the output side of the rectifying circuit 23, can be additionally connected to the rectifying circuit. A control part 26 controls the inverter main circuit so that a current detection value detected by current detection means Ru, Rv, Rw provided on a load side of a connection part to which an output end of the multi-pulse rectifier is connected in the output side of the rectifying circuit does not exceed a preset current set value. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
