Title:
MOTOR CONTROL CIRCUIT, MOTOR DRIVE CONTROLLER AND CONTROL METHOD OF MOTOR DRIVE CONTROLLER
Document Type and Number:
Japanese Patent JP2018014802
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a motor control circuit capable of preventing occurrence of abnormal state when using a free run stop method.SOLUTION: A speed control circuit 33 outputs a torque command signal S1 based on a clock signal Sc and a revolution signal Sr, and a sine wave drive circuit 35 generates a drive command signal Sd based on the torque command signal S1. When input of the clock signal Sc was stopped, a drive stop control circuit 41 outputs a drive stop control signal S5 based on the revolution signal Sr and torque command signal S1. A first drive stop control signal S5a for performing short circuit brake control based on the detection results that the torque command signal S1 is less than a specified value, and the revolution speed of the motor 20 is less than a specified first threshold, is outputted, and a second drive stop control signal S5b for performing free run stop control based on the detection results that the torque command signal S1 is less than a specified value, and the motor 20 is in drive sop state, is outputted.SELECTED DRAWING: Figure 2
Inventors:
KATAYAMA KEIICHI
Application Number:
JP2016141837A
Publication Date:
January 25, 2018
Filing Date:
July 19, 2016
Export Citation:
Assignee:
MINEBEAMITSUMI INC
International Classes:
H02P3/22
Domestic Patent References:
| JP2015076964A | 2015-04-20 | |||
| JPH02223396A | 1990-09-05 | |||
| JPH0412686A | 1992-01-17 | |||
| JPH11235066A | 1999-08-27 | |||
| JP2001054292A | 2001-02-23 |
Attorney, Agent or Firm:
Yutaka Tsubaki
Ishikawa Tatsuro
Tsuyoshi Shiraka
Ishikawa Tatsuro
Tsuyoshi Shiraka