| 摘要 |
<P>PROBLEM TO BE SOLVED: To correct an imbalance between the gain errors of two current sensors by accurately detecting a ratio between the gain errors of the two current sensors which detect a current that flows to an AC motor mounted on a vehicle. <P>SOLUTION: A control device executes rotor rotation stop position change control to change a rotor rotation stop position of an AC motor 13 to a target stop position during stoppage of the AC motor 13. In this rotor rotation stop position change control, the control device controls current application to the AC motor 13 so that the output torque of the AC motor 13 may be a target torque by setting the target torque according to the deviation of the rotor rotation stop position of the AC motor 13 from the target stop position. Then, it computes a ratio (kv/kw) between the gain errors of the current sensors 58 and 59 based on the ratio (Iv/Iw) of current commands of a phase V and a phase W when a reactive current order is issued during stoppage of the AC motor 13 and a ratio (iv/iw) between the outputs of the current sensors 58 and 59, and corrects the output of one of the current sensors 58 and 59 by using the ratio between the gain errors. <P>COPYRIGHT: (C)2011,JPO&INPIT |
