To provide a permanent magnet type rotary electric machine which enables adjustable-speed operation in a wide range from a low speed to a high speed in a high output, and realizes efficiency enhancement and reliability enhancement.
The permanent magnet type rotary electric machine of the present invention comprises: a stator provided with a coil; and a rotor where arranged are a permanent magnet of a low coercive force to the extent that flux density changes irreversibly by a magnetic field made from a current of said stator coil and a permanent magnet of a high coercive force having more than twice as much coercive force as said low coercive force. In a high-speed rotation range which becomes not less than the maximum voltage of a source voltage, the whole amount of flux linkages is adjusted by making a permanent magnet having the low coercive force magnetized by a magnetic field due to the current so that all the flux linkages due to the permanent magnet having the low coercive force and the permanent magnet having the high coercive force may decrease.
SHIN MASANORI
| JPH07336980A | 1995-12-22 | |||
| JPH11136912A | 1999-05-21 | |||
| JP2001333553A | 2001-11-30 | |||
| JP2002078255A | 2002-03-15 |
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu