| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a permanent magnet type electric rotating machine, capable of variable speed operation ranging from low speed to high speed with high output by suppressing an increase in magnetization current, when magnetization is decreased of increased. <P>SOLUTION: A rotor 1 includes a rotor core 2, a permanent magnet 3 having a small product of a coercive force and a magnetization direction thickness, and a permanent magnet 4 having a large product of a coercive force and a magnetization direction thickness. When the interlinkage magnetic flux of the permanent magnet 3 is reduced, a magnetic field having a direction reverse to that of the magnetization direction of the permanent magnet 3 is made to act by a current of an armature winding. When the interlinkage magnetic flux of the permanent magnet 3 is increased, the magnetic flux of the direction same as the magnet magnetization direction is made to act by a current of the armature winding. A short circuit coil 8 is provided at a magnetic passage portion of the other permanent magnet 4, other than the permanent magnet 3. An induction current is induced on the short circuit coil 8 by a magnetic field generated by the magnetized current, and this induction current causes a magnetic field around the short-circuit coil 8. The permanent magnet 3 is increased in magnetization by the magnetic field generated by this magnetic field and the magnetization current. <P>COPYRIGHT: (C)2010,JPO&INPIT |
