| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress motor torque fluctuation after the control mode is changed from rectangular wave control to overmodulation control. <P>SOLUTION: When an inverter is controlled under overmodulation control, voltage commands Vd* and Vq* of a d-axis and a q-axis are set by current feedback control that uses a difference between currents Id, Iq and current commands Id*, Iq* of the d-axis and q-axis, control gains of proportional and integral terms, and an integral interval of the integral term. During the switching of the control mode between the rectangular wave control and overmodulation control, when the motor torque fluctuation is likely to increase due to the switching (i.e., a fluctuation-supposed state) (S110, S120), the gains of the proportional and integral terms are made larger and the integral interval of the integral term is made shorter (S140) than in a non fluctuation-supposed state. <P>COPYRIGHT: (C)2013,JPO&INPIT |
