| 摘要 |
<p>After a rotor of a three-phase brushless motor is previously moved by a simple control method to a predetermined rotary position, a motor is started-up. A brushless motor control device (10) moves a rotor (3) to a predetermined rotary position (stop position) before a three-phase brushless motor (1) is started-up. Direct current Iuw is flowed between the same phases (U-phase, V-phase) for an initialization time, such as several 10 msec, thereby previously moving the rotor (3) to a predetermined rotary position. At the time when the initialization time elapses, the rotor (3) has moved to the predetermined rotary position. Therefore, the brushless motor control device (10) has recognized which phase is to be conducted first in order to rotate the motor 1 forward/backward. Thus, when the rotor is rotated forward/backward, the brushless motor control device (10) can accurately set a conduction phase to a motor coil.</p> |
