基本信息:
- 专利标题： Controller of a stepping motor, control method for the motor and timing device
- 专利标题（中）：控制器，用于步进电机控制方法，与定时装置
- 申请号：EP98309040.8 申请日：1998-11-05
- 公开(公告)号：EP0915397A3 公开(公告)日：2000-11-15
- 发明人： Kojima, Hiroyuki , Yabe, Hiroshi
- 申请人： SEIKO EPSON CORPORATION
- 申请人地址： 4-1, Nishishinjuku 2-chome Shinjuku-ku, Tokyo 163-0811 JP
- 专利权人： SEIKO EPSON CORPORATION
- 当前专利权人： SEIKO EPSON CORPORATION
- 当前专利权人地址： 4-1, Nishishinjuku 2-chome Shinjuku-ku, Tokyo 163-0811 JP
- 代理机构： Sturt, Clifford Mark
- 优先权： JP30320197 19971105; JP26853398 19980922
- 主分类号： G04C3/14
- IPC分类号： G04C3/14
摘要：
A power-saving controller for controlling a stepping motor mounted for example in an electronic wristwatch. A pulse signal generator in the controller combines two pulse signals GPi and GPi+2 having different duty factors using a compositing signal CP, based on a reference signal BP, thereby compositing a pulse signal GPi+1 having an intermediate duty factor. Even if the frequency of the reference signal BP is lowered, a step size for controlling the duty factor of a drive pulse is prevented from expanding, thereby avoiding the driving power required by the stepping motor from increasing. The lowering of the frequency of the reference signal BP reduces the power consumption of the circuit of the wristwatch and, thus of the controller.