| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bearingless motor and a bearingless motor control system which adjust radial position, while accurately adjusting a magnetic field of a permanent magnet of a brushless DC motor, by winding a magnetic support coil and a motor coil as a pair, and are stably controlled with space-saving. <P>SOLUTION: The magnetic support coil 13a1 and the magnetic support coil 13a2 are set as a single phase, and are defined as an a-phase coil. Similarly, the magnetic support coils 13b1, 13b2 are constituted as a single phase, and are defined as a b-phase coil; then the magnetic support coils 13c1, 13c2 are constituted as a single phase, and are defined as a c-phase coil. In the brushless DC motor of 12-slot and 8-pole structure, the a-phase coil is excited to generate magnetic supporting force in the radial direction, at a section of 15°≤ϕ<30°, 60°≤ϕ<75°, in the rotation angle ϕ. Similarly, the b-phase (b1, b2) coil is excited at a section of 0°≤ϕ<15°, 45°≤ϕ<60°, while the c-phase (c1, c2) coil is excited at a section of 30°≤ϕ<45°, 75°≤ϕ<90°. <P>COPYRIGHT: (C)2008,JPO&INPIT |
