Login| Sign Up| Help| Contact|

Patent Searching and Data


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 (4106-73 Oaza Miyota Miyota-machi, Kitasaku-gu, Nagano 93, 〒3890293, JP)
Application Number:
JP2017/028892
Publication Date:
March 08, 2018
Filing Date:
August 09, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MINEBEA MITSUMI INC. (4106-73 Oaza Miyota, Miyota-machi Kitasaku-gu, Nagano 93, 〒3890293, JP)
International Classes:
H02P8/24
Foreign References:
JP2013102656A2013-05-23
JP2011139582A2011-07-14
US5793168A1998-08-11
US20140217939A12014-08-07
US20120098473A12012-04-26
Attorney, Agent or Firm:
EINSEL Felix-Reinhard et al. (Sonderhoff & Einsel Law and Patent Office, Shin-Marunouchi Center Building 6-2, Marunouchi 1-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)
Download PDF: