| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor controller capable of preventing a rotation of an AC motor in addition to reducing operation load of a control circuit when the AC motor consumes electric energy to discharge electric charge of a smoothing capacitor. <P>SOLUTION: When discharging electric charge of a smoothing capacitor, without performing a d-axis current feedback control of an AC motor 12, a q-axis current feedback control setting a d-axis voltage command value Vd as a positive value and setting a q-axis current command value Iq at 0 is performed to set a q-axis voltage command value Vq so as to minimize deviation Δiq between the q-axis current command value Iq and a q-axis current detection value iq. Electric conduction of the AC motor 12 is controlled by controlling an invertor 18 on the basis of the d-axis voltage command value Vd and the q-axis voltage command value Vq. This enables to bring torque of the AC motor 12 to almost zero in addition to consuming electric energy in the AC motor 12. And to set the d-axis voltage command value Vd as positive value decreases torque occurred when a current vector changes in a q-axis direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
