Title:
MOTOR DRIVE CONTROL DEVICE AND MOTOR DRIVE CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2018/043077
Kind Code:
A1
Abstract:
The purpose of the invention is to accurately control a rotation stop position of a motor. A motor control device (100) is provided with a BEMF detection unit (118) and a CPU (101). The BEMF detection unit (118) detects a zero-crossing point of a back electromotive voltage of a motor coil provided in a motor. The CPU (101) drive-controls the motor using a one-phase excitation, position sensorless scheme, commutates the motor on the basis of the zero-crossing point of the back electromotive voltage detected by the BEMF detection unit (118), and drive-controls the motor by a rotation speed corresponding to a drive voltage and a load. When stopping the driving of the motor, the CPU (101) performs a step-by-step commutation time extension control from a calculated deceleration start step until the rotation speed decreases to a predetermined rotation speed or less at which the motor can be stopped at a desired position.
Inventors:
HIJIKATA HIDETOSHI (JP)
Application Number:
PCT/JP2017/028892
Publication Date:
March 08, 2018
Filing Date:
August 09, 2017
Export Citation:
Assignee:
MINEBEA MITSUMI INC (JP)
International Classes:
H02P8/24
Foreign References:
| JP2013102656A | 2013-05-23 | |||
| JP2011139582A | 2011-07-14 | |||
| US5793168A | 1998-08-11 | |||
| US20140217939A1 | 2014-08-07 | |||
| US20120098473A1 | 2012-04-26 |
Attorney, Agent or Firm:
EINSEL Felix-Reinhard et al. (JP)
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