Device for increasing rotation speed of permanent magnetic motor

This ivnention relates to a device capable of increasing rotating speed of permanent-magnet motor in which a set of magnetic sensors makes the magnet excited current of stator coils and the rotating magnetic pole of rotator magnet implement orthogonal transformation and the motor armature air-gap flux density value be the highest, and other sets of magnetic sensors make the magnet-excited currentof stator coils and the rotating magnetic pole of rotator magnet implement non-orthogonal transformation so to reduce the motor armature air-gap flux density value resulting in the increased speed ofthe armature rotator. This invented motor has great torsion constant KT, and at same time, it is switched to make the magnetic sensor be at no northogonal magnet exciting angle by the rotating magnetic poles of the stator coils and rotator coils, when higher rotating speed is needed.