发明授权
US4748387A DC brushless motor driving method and apparatus for accurately
controlling starting position of rotor
失效
用于精确控制转子起动位置的直流无刷电机驱动方法和装置
- 专利标题: DC brushless motor driving method and apparatus for accurately controlling starting position of rotor
- 专利标题(中): 用于精确控制转子起动位置的直流无刷电机驱动方法和装置
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申请号: US75034申请日: 1987-07-17
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公开(公告)号: US4748387A公开(公告)日: 1988-05-31
- 发明人: Jiro Tanuma , Takao Uchida
- 申请人: Jiro Tanuma , Takao Uchida
- 申请人地址: JPX Tokyo
- 专利权人: Oki Electric Industry Co., Ltd.
- 当前专利权人: Oki Electric Industry Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX61-173926 19860725
- 主分类号: H02P6/20
- IPC分类号: H02P6/20 ; B41J33/34 ; H02P6/18 ; H02P6/22 ; H02K29/14 ; H02P9/00
摘要:
A driving apparatus for controlling the drive of a direct current (DC) brushless motor including a stator having a plurality of armature coils which are provided on a generally circular stator yoke, and a rotatable rotor in which a disk-like magnet having N and S poles arranged alternately in a circumferential direction is provided on a generally circular rotor yoke to face the armature coils, includes a speed sensor for producing outputs responsive to a rotation speed of the rotor, a counter for counting the pulses which are produced by the speed sensors, a control circuit responsive to the speed sensors and counter for controlling the current applied to the armature coils in a predetermined sequence to thereby rotate the rotor, and a mechanism for cancelling a load acting on the rotor. The control circuit, at a start-up of the motor, switches the current applied to the armature coils to excite the armature coils in several different phases to thereby locate the rotor at a starting angular position, in the event when the rotor is located at the starting angular position, cancels a load acting on the rotor, at least before a last one of the phases is excited, subsequently controls rotation drive by counting output pulses of the speed sensor to determine an angular position of the rotor, and controls a rotation direction of the rotor on the basis of output pulses of the speed sensor and on a resulting count of the pulses. Also provided is a driving method for a brushless DC motor for effecting such a control.
公开/授权文献
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