Motor driving control device and control method of motor driving control device

Patent metadata

Field	Value
Publication number	US-9379647-B2
Application number	US-201414488482-A
Country	US
Kind code	B2
Filing date	Sep 17, 2014
Priority date	Sep 20, 2013
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

There is provided a motor driving control device including a state determining unit which determines whether a motor can perform a slow start operation based on a rotating state and a driving state of the motor, a control unit which generates command information corresponding to a speed at which the motor is to be rotated, based on a determination result of the state determining unit, and a motor driving unit which outputs a driving signal corresponding to the command information generated by the control unit to the motor so as to drive the motor. When it is determined that the motor can perform the slow start operation, the control unit generates the command information such that the motor performs the slow start operation.

First claim

What is claimed is:

1. A motor driving control device comprising:
a rotation detecting unit configured to detect a rotating state of a motor, the rotating state including current rotation speed of the motor;
a drive detecting unit configured to detect a driving state of the motor, the driving state including whether the motor is instructed to stop or to rotate;
a command acquiring unit configured to acquire first command information that indicates target rotation speed of the motor;
a state determining unit configured to determine whether the motor can perform a slow start operation based on a detection result of the rotation detecting unit and a detection result of the drive detecting unit, when the command acquiring unit acquires the first command information indicating the target rotation speed to start rotation of the motor;
a control unit configured to generate second command information corresponding to a speed at which the motor is to be rotated, based on a determination result of the state determining unit and the first command information acquired by the command acquiring unit; and
a motor driving unit configured to output a driving signal corresponding to the second command information generated by the control unit to the motor so as to drive the motor,
wherein when it is determined that the motor can perform the slow start operation by the state determining unit, the control unit is configured to generate the second command information such that the motor performs the slow start operation,
wherein the drive detecting unit is configured to detect whether the motor is instructed to stop based on the second command information generated by the control unit,
wherein the rotation detecting unit is configured to detect whether a rotating speed of the motor is smaller than a predetermined value, and
wherein in a state where the drive detecting unit detects that the motor is instructed to stop, the state determining unit is configured to determine that the motor can perform the slow start operation when the rotation detecting unit detects that the rotating speed of the motor is smaller than the predetermined value.

2. The motor driving control device according to claim 1 ,
wherein the state determining unit is configured to determine that the motor can perform the slow start operation when the drive detecting unit detects that the driving of the motor is not stopped.

3. The motor driving control device according to claim 1 , further comprising:
a short brake unit configured to control the motor driving unit such that the motor becomes a short brake state when the drive detecting unit detects that the driving of the motor is stopped and when the rotation detecting unit detects that the rotating speed of the motor is not smaller than the predetermined value.

4. The motor driving control device according to claim 1 ,
wherein a part or all of the motor driving control device is packaged as an integrated circuit device.

5. A control method of a motor driving control device including: a rotation detecting unit configured to detect a rotating state of a motor, the rotating state including current rotation speed of the motor; a drive detecting unit configured to detect a driving state of the motor, the driving state including whether the motor is instructed to stop or to rotate; and a command acquiring unit configured to acquire first command information that indicates target rotation speed of the motor, the control method comprising:
when the command acquiring unit acquires the first command information indicating the target rotation speed to start rotation of the motor, determining whether the motor can perform a slow start operation based on a detection result of the rotation detecting unit and a detection result of the drive detecting unit;
generating second command information corresponding to a speed at which the motor is to be rotated, based on a determination result of the state determining unit and the first command information acquired by the command acquiring unit; and
outputting a driving signal corresponding to the generated second command information to the motor so as to drive the motor,
wherein when it is determined that the motor can perform the slow start operation, the generating step generates the second command information such that the motor performs the slow start operation,
wherein the drive detecting unit is configured to detect whether the motor is instructed to stop based on the second command information generated by the control unit,
wherein the rotation detecting unit is configured to detect whether a rotating speed of the motor is smaller than a predetermined value, and
wherein the determination that the motor can perform the slow start operation is based on the drive detecting unit determining that the motor is instructed to stop and the rotation detecting unit detecting that the rotating speed of the motor is smaller than the predetermined value.

Assignees

• Minebea Co Ltd

Inventors

• Nishi Shuhei

Classifications

• H02P1/029

  Restarting, e.g. after power failure · CPC title

• H02P6/06

  Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed · CPC title

• H02P6/17

  and for generating speed information · CPC title

• H02P6/08 Primary

  Arrangements for controlling the speed or torque of a single motor (H02P6/10, H02P6/28 take precedence) · CPC title

• H02P1/52 Primary

  by progressive increase of frequency of supply to motor · CPC title