| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control apparatus by which a computation cycle related to internal processing by a voltage control unit is optimized, and a processing load in controlling an AC motor is reduced. <P>SOLUTION: By a vector control method, the control apparatus controls an electric motor drive device equipped with a DC/AC conversion unit which converts a DC voltage to an AC voltage to supply the converted AC voltage to the AC motor. As a voltage control unit which generates a control signal for controlling the DC/AC conversion unit from a voltage command value for driving the AC motor, the control device includes a first voltage control unit which derives a modulation rate and a voltage command phase on the basis of the voltage command value and an actual DC voltage supplied to the DC/AC conversion unit, and a second voltage control unit which generates the control signal on the basis of the modulation rate, the voltage command phase, and a magnetic pole position. The computation cycle (second computation cycle T2) of the first voltage control unit is set to be longer than the computation cycle (first computation cycle T1) of the second voltage control unit. <P>COPYRIGHT: (C)2011,JPO&INPIT |
