Title:
MOTOR ROTATION SPEED CONTROL METHOD
Document Type and Number:
Japanese Patent JP2019198207
Kind Code:
A
Abstract:
To provide a motor rotation speed control method capable of reducing vibration and noise generated from a motor.SOLUTION: A motor rotation speed control method includes: a driving step in which power supply current passes through a bridge drive circuit to enter a motor coil; an abort step of simultaneously shutting off two high-side units of the bridge drive circuit thereby to stop the power supply current from entering the motor coil; a deceleration step of inputting a deceleration signal into two low-side units of the bridge drive circuit, making the two low-side units and the motor coil form a closed circuit, determining whether a duty ratio of the deceleration signal has reached a target duty ratio or not, and, when it is determined that the duty ratio has reached the target duty ratio, moving to the next step, while, when it is determined that the duty ratio has not reached the target duty ratio, moving to the next step after the duty ratio is increased; and a stopping step of determining whether a motor has stopped after the deceleration step or not, and, when it is determined that the motor has stopped, stopping the input of the deceleration signal as brake completion, while, when it is determined that the motor has not stopped, repeating the deceleration step.SELECTED DRAWING: Figure 2
Inventors:
HONG YINSHU
HUANG GUAN WEN
HUANG GUAN WEN
Application Number:
JP2018101351A
Publication Date:
November 14, 2019
Filing Date:
May 28, 2018
Export Citation:
Assignee:
SUNONWEALTH ELECTRIC MACHINE IND CO LTD
International Classes:
H02P3/22; H02P29/00
Attorney, Agent or Firm:
Sumiko Shimosaka
Yusuke Uchikoshi
Kawanari Wataru
Yusuke Uchikoshi
Kawanari Wataru