Energy saving vector control strategies for electric vehicle motor drives

The applications of different energy saving vector control strategies to motor drives used in the electric vehicle (EV) are studied. The performance of an interior permanent magnet (IPM) motor drive under an off-line energy saving control over a typical EV driving cycle is presented. Discussing the difficulties and limitations of the off-line, and currently available on-line energy saving methods, an advanced on-line energy saving control strategy is proposed for EV applications. The strategy is based on an adaptive current vector control. The performance of an IPM motor drive under the proposed control strategy is evaluated experimentally. Test results are given to prove the validity of this strategy for energy saving in the motor drive.