Title:
MOTOR CONTROLLER, SYSTEM INCLUDING MOTOR CONTROLLER AND OPTICAL INSTRUMENT, AND MOTOR CONTROL METHOD
Document Type and Number:
Japanese Patent JP2019083688
Kind Code:
A
Abstract:
To control, in a motor controller using a sinusoidal drive waveform, the phase of the drive waveform while detecting the position of a motor shaft.SOLUTION: A motor controller according to the present invention is a motor controller that applies a drive voltage to a motor to drive the motor, and comprises position detection mans that outputs a position signal corresponding to the rotational position of a rotor; and control means that acquires a phase value of the drive voltage applied to the motor at a timing according to the position signal and controls to change the period of the drive voltage on the basis of the phase value. When the phase value of the drive voltage acquired at the timing according to output of the position signal is different from a target phase value of the drive voltage at a predetermined angle time, the control means changes the inclination of the drive voltage to change the period of the drive voltage so that the difference between the target phase value and a phase value of the drive voltage at a second timing at which a predetermined time elapses from a first timing becomes smaller than the difference between the target phase value and a phase value of the drive voltage at the first timing.SELECTED DRAWING: Figure 2
Inventors:
MIZUO YOSHIHIRO
Application Number:
JP2019028374A
Publication Date:
May 30, 2019
Filing Date:
February 20, 2019
Export Citation:
Assignee:
CANON KK
International Classes:
H02P8/18; H02P8/38; G02B7/04; H02P6/00; H02P6/08; H02P8/34
Attorney, Agent or Firm:
Ryoichi Takaoka
Nao Oda
Rena Miyoshi
Nao Oda
Rena Miyoshi