| 摘要 |
PROBLEM TO BE SOLVED: To prevent power utilization efficiency from being deteriorated resulting from a switching loss of an inverter INV or the like when switching on and off a switching element S¥#(¥=u,v,w: #=p,n) in order to feedback-control a current flowing in a motor generator 10 to a current command value for making torque zero.SOLUTION: A current command value setting part 24 sets a current command value (current command value id*, iq*) to materialize a torque command value Trq*. When the torque command value Trq* is zero, basically the current command value id*, iq* may be zero, however, when a percentage modulation exceeds 1, field weakening control is performed with the current command value id* on a d-axis set as a negative one. When the torque command value Trq* is zero and the percentage modulation is 1 or less, all switching elements S¥# are switched off. |
