Invention Application
US20140071794A1 STEPPING MOTOR CONTROL CIRCUIT, MOVEMENT AND ANALOG ELECTRONIC TIMEPIECE
有权
步进电机控制电路,运动和模拟电子计时器
- Patent Title: STEPPING MOTOR CONTROL CIRCUIT, MOVEMENT AND ANALOG ELECTRONIC TIMEPIECE
- Patent Title (中): 步进电机控制电路,运动和模拟电子计时器
-
Application No.: US14013120Application Date: 2013-08-29
-
Publication No.: US20140071794A1Publication Date: 2014-03-13
- Inventor: Kosuke YAMAMOTO , Saburo MANAKA , Kazumi SAKUMOTO , Kenji OGASAWARA , Keishi HONMURA , Satoshi SAKAI
- Applicant: SEIKO INSTRUMENTS INC.
- Applicant Address: JP Chiba
- Assignee: SEIKO INSTRUMENTS INC.
- Current Assignee: SEIKO INSTRUMENTS INC.
- Current Assignee Address: JP Chiba
- Priority: JP2012-197538 20120907; JP2012-260264 20121128; JP2012-273939 20121214; JP2013-050534 20130313; JP2013-143784 20130709
- Main IPC: G04C3/14
- IPC: G04C3/14 ; H02P8/38

Abstract:
A stepping motor control circuit includes: a rotation detection unit that detects a induced signal exceeding a predetermined reference threshold voltage which is generated by a stepping motor in a detection section divided into at least three sections, and detects a rotation state on the basis of a pattern indicating whether the induced signal exceeding a reference threshold voltage is detected in each of the sections; and a control unit that selects a main drive pulse depending on the rotation state detected by the rotation detection unit from a plurality of main drive pulses which are different from each other in energy, and drives the stepping motor. When the induced signal exceeding a reference threshold voltage is not detected in an initial section, the rotation detection unit detects the induced signal by shifting an end position of at least one section other than the initial section to a rear side by a predetermined amount.
Public/Granted literature
- US09182746B2 Stepping motor control circuit, movement and analog electronic timepiece Public/Granted day:2015-11-10
Information query