发明授权
- 专利标题: Stepping motor control circuit and analog electronic watch
- 专利标题(中): 步进电机控制电路和模拟电子手表
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申请号: US12661359申请日: 2010-03-16
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公开(公告)号: US08139445B2公开(公告)日: 2012-03-20
- 发明人: Keishi Honmura , Saburo Manaka , Kosuke Yamamoto , Akira Takakura , Kenji Ogasawara , Kazumi Sakumoto , Kazuo Kato , Takanori Hasegawa
- 申请人: Keishi Honmura , Saburo Manaka , Kosuke Yamamoto , Akira Takakura , Kenji Ogasawara , Kazumi Sakumoto , Kazuo Kato , Takanori Hasegawa
- 申请人地址: JP
- 专利权人: Seiko Instruments Inc.
- 当前专利权人: Seiko Instruments Inc.
- 当前专利权人地址: JP
- 代理机构: Adams & Wilks
- 优先权: JP2009-064819 20090317
- 主分类号: G06F1/04
- IPC分类号: G06F1/04 ; G04F5/00 ; H02P8/00
摘要:
A stepping motor control circuit includes a rotation detecting means which detects an induced signal generated by rotation of a rotor of a stepping motor, and detects a rotation state of the stepping motor according to whether the induced signal exceeds a predetermined reference threshold voltage in a predetermined detection section, and a control means which controls driving of the stepping motor by using any one of a plurality of main driving pulses having energies different from each other or a correction driving pulse with energy higher than energy of each main driving pulse according to a detection result of the rotation detecting means. The detection section is divided into a first section immediately after driving by the main driving pulse, a second section after the first section and a third section after the second section. During the driving of the stepping motor by the main driving pulse, when the rotation detecting means has detected an induced signal exceeding a first reference threshold voltage in the first section and the second section, if an induced signal exceeding a second reference threshold voltage lower than the first reference threshold voltage is not detected in the third section, the control means drives the stepping motor by using the correction driving pulse.
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