HYBRID ELECTRIC VEHICLE EMPLOYING PERMANENT MAGNET TYPE DYNAMO-ELECTRIC MACHINE

摘要

PURPOSE: To improve efficiency in a permanent magnet rotating electric machine and a hybrid electric vehicle, using it in high speed rotation. CONSTITUTION: The shape per pole of a rotor is set asymmetrical, so that the ratio of the maximum torque outputted by the rotating electric machine when the machine rotates forward to torque outputted by the machine in the backward rotation becomes 1:1.05-1.2, namely the torque in backward rotation becomes larger, and magnetic flux in advance is reduced. More specifically, the ratio of width (a) in the rotary direction of a permanent magnet insertion hole to width (d) of a permanent magnet is set to 1:0.5-0.9, so that the ratio of torque in forward and backward rotations (advance and reverse) becomes 1.05-1.2, namely the torque in backward rotation (retreat). Or an inclination angle () of the permanent magnet insertion hole to a circumferential direction is set to 10-45 degrees (machine angle).