Patent ID: 9577484
Date: 2017-02-21
CPC Classifications: H02K,H02P

Claim:
1. A variable magnetomotive force rotary electric machine comprising: an annular stator including a stator winding wound on a plurality of teeth; and a rotor having a circular shape that is concentric with the stator, and the rotor including at least one permanent magnet arranged in a d-axis magnetic path, the rotor including a magnetic gap part located between the at least one permanent magnet arranged in the d-axis magnetic path of one pole and an adjacent magnet with a different polarity, such that a d-axis magnetic flux forms a d-axis bypass passing through an area other than the at least one permanent magnet, and the d-axis bypass provides a magnetic resistance in a d-axis direction that is set below a magnetic resistance in a q-axis direction that is orthogonal to the d-axis resistance; the at least one permanent magnet having a coercivity providing for complete magnetization by a magnetic field equal to or less than an armature reaction that is produced by a power-supplying inverter, and the at least one permanent magnet having a ratio of a circumferential length of the at least one permanent magnet with respect to a length of a single pole on a circumference of the rotor that is 50% or less; and the magnetic gap part being arranged in a q-axis magnetic path, with a radial width of the magnetic gap part in a direction of the q-axis magnetic path being greater than a dimension of the at least one permanent magnet in a magnetization direction.