| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an actuator capable of making constant a stop position of a rotor when a driving coil is not magnetized, and capable of extending a rotation range of the rotor. <P>SOLUTION: In an actuator 1, a torque acting on a rotor is made to be a detent torque when a driving coil 11 is not magnetized, and the torque acting on the rotor is made to be an energization torque based on magnetic attraction between a magnetic member 19 and an energizing magnet 18 which energizes the rotor to one direction of a rotation direction of the rotor, and the torque acting on the rotor is made to be a magnetization torque based on a suction force and repulsive force generated between a driving magnet 6 and pole gears 13d, 14d when the driving coil 11 is magnetized, and then, the rotation range of the rotor is controlled so that the rotor may rotate in the range where a sum of the detent torque and the energization torque acts on one direction of the rotation direction of the rotor, and a sum of the detent torque and the energization torque acts on other direction of the rotation direction of the rotor. <P>COPYRIGHT: (C)2012,JPO&INPIT |
