Title:
DRIVING CIRCUIT FOR NORMAL/REVERSE ROTATION PULSE MOTOR
Document Type and Number:
Japanese Patent JP2015154697
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a pulse motor in which output torque difference between normal rotation and reverse rotation is small so that it can surely conduct reverse rotation even when a rotor does not reversely rotate due to a shock or variation of load at reverse rotation attempt.SOLUTION: The pulse motor includes a rotor, a stator for magnetically driving the rotor, a driving coil for magnetizing the stator, a control circuit for controlling the energization of the driving coil, and a detection circuit for detecting the rotation of the rotor. When it is detected that the rotor does not rotate, the control circuit generates a phase matching pulse for matching the phase of the rotor and then applies a compensation driving signal to the rotor.
Inventors:
SATO KOICHI
Application Number:
JP2014029430A
Publication Date:
August 24, 2015
Filing Date:
February 19, 2014
Export Citation:
Assignee:
CITIZEN HOLDINGS CO LTD
CITIZEN WATCH CO LTD
CITIZEN WATCH CO LTD
International Classes:
H02P8/02; G04C3/14
Attorney, Agent or Firm:
Akira Miyajima