| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor driving controller for always driving a motor in the maximum efficiency condition while maintaining linearity without changing a motor constant depending on the line connection state. <P>SOLUTION: The controller is provided with first and second inverter units 4, 5 each generating an AC voltage from DC power of an AC-DC power transformer unit 2 and outputting the AC voltage to an independent winding type motor 3; and a control means for controlling the first and second inverter units 4, 5 so that the independent winding type motor 3 can perform Y-wire connection equivalent operation or Δ wire connection equivalent operation. When the independent winding type motor 3 shifts from the Y-wire connection equivalent operation to the Δ wire connection equivalent operation, the control means controls the output voltages of the first and second inverter units 4, 5 so that the phase between the vector of a magnetic flux generated in the armature winding of the independent wining type motor 3 and the vector of a composite voltage by the first and second inverter units may maintain a predetermined relation. <P>COPYRIGHT: (C)2008,JPO&INPIT |
