| 摘要 |
PROBLEM TO BE SOLVED: To easily adjust a braking time, and to efficiently decelerate a brushless motor by using a deceleration signal for the brushless motor and generating a pulse, and braking the motor by short-circuiting individual phases to one another, only while the pulse is generated. SOLUTION: To a pulse generating circuit 1, an interphase short-circuiting circuit 2 is connected, and to this short-circuiting circuit 2, a brushless motor driving circuit 3 is connected. Furthermore, to the driving circuit 3, a brushless motor 4 is connected. Besides, to the motor 4, a speed detector 5 is connected, and to this speed detector 5, a speed controlling circuit 6 is connected, and the motor 4 is rotated at a constant speed. To the controlling circuit 6, a deceleration signal is inputted, and the controlling circuit 6 controls the speed of the motor 4 to a specified speed after deceleration. When a deceleration signal S is inputted, a pulse of a constant time is generated from the generating circuit 1, the short-circuiting circuit 2 is operated, and the motor 4 is braked for the time of generation of the pulse. Consequently, it becomes possible to reduce the speed of the motor 4 in a short time, and to rotate the motor 4 at a specified speed. |
