Motor control device, motor control system, image forming apparatus, conveyance apparatus, and motor control method

Patent metadata

Field	Value
Publication number	US-2017187321-A1
Application number	US-201615387821-A
Country	US
Kind code	A1
Filing date	Dec 22, 2016
Priority date	Dec 28, 2015
Publication date	Jun 29, 2017
Grant date	—

Abstract

A motor control device includes a controller and a detector. The controller is configured to control, when receiving an operation request indicating rotation or stop of a motor, rotation of the motor based on the operation request. The detector is configured to detect whether the motor is rotating. The controller stops the motor when the detector detects rotation of the motor after an elapsed time from reception of the operation request indicating stop of the motor reaches a first threshold.

First claim

What is claimed is:

1 . A motor control device comprising:
a controller configured to control, when receiving an operation request indicating rotation or stop of a motor, rotation of the motor based on the operation request; and a detector configured to detect whether the motor is rotating, wherein the controller stops the motor when the detector detects rotation of the motor after an elapsed time from reception of the operation request indicating stop of the motor reaches a first threshold.

2 . The motor control device according to claim 1 , wherein the controller stops the motor when a time in which the detector continuously detects rotation of the motor reaches a second threshold after the elapsed time reaches the first threshold.

3 . The motor control device according to claim 1 , wherein the controller stops the motor when the detector detects rotation of the motor a predetermined number of times or more and continuously after the elapsed time reaches the first threshold.

4 . The motor control device according to claim 1 , wherein the detector detects, when the operation request received in a period from power-on of the motor until a lapse of a predetermined time indicates stop of the motor, rotation of the motor before the elapsed time reaches the first threshold.

5 . The motor control device according to claim 1 , wherein the controller does not reset the elapsed time when receiving a new operation request indicating stop of the motor before the elapsed time reaches the first threshold.

6 . The motor control device according to claim 1 , wherein the detector changes the first threshold depending on a rotation speed of the motor.

7 . The motor control device according to claim 1 , wherein the controller stops supplying power to a brake or the motor so as to stop the motor.

8 . A motor control system comprising:
the motor control device according to claim 1 ; and the motor.

9 . An image forming apparatus comprising the motor control system according to claim 8 .

10 . The image forming apparatus according to claim 9 , further comprising:
a plurality of the motors; and a host controller configured to transmit the operation request to the motor control device, wherein the host controller transmits, when the detector detects an abnormality in rotation of at least one of the motors in a state in which the operation request indicating rotation of the motors is transmitted to the motor control device so as to rotate the motors, the operation request indicating stop of the motors to the motor control device.

11 . The image forming apparatus according to claim 10 , further comprising a heater configured to heat a medium conveyed by rotation of the motors, wherein
the host controller stops, when the detector detects an abnormality in rotation of at least one of the motor in a state in which the operation request indicating rotation of the motors is transmitted to the motor control device so as to rotate the motors, the heater from heating the recording medium.

12 . The image forming apparatus according to claim 10 , wherein the host controller prohibits, when the detector detects an abnormality in rotation of at least one of the motors in a state in which the operation request indicating rotation of the motors is transmitted to the motor control device so as to rotate the motors, application of bias related to image forming.

13 . A conveyance apparatus comprising the motor control device according to claim 8 .

14 . The conveyance apparatus according to claim 13 , further comprising:
a plurality of the motors; and the host controller configured to transmit the operation request to the motor control device, wherein the host controller transmits, when the operation request indicating rotation of the motors is transmitted to the motor control device and the detector detects an abnormality in rotation of at least one of the motors, the operation request indicating stop of the motors to the motor control device.

15 . A motor control method comprising:
controlling, when receiving an operation request indicating rotation or stop of a motor, rotation of the motor based on the operation request; detecting whether the motor is rotating; and stopping the motor when the rotation of the motor is detected after an elapsed time from reception of the operation request indicating stop of the motor reaches a first threshold.

16 . The motor control method according to claim 15 , wherein the stopping includes stopping the motor when a time in which the rotation of the motor is continuously detected reaches a second threshold after the elapsed time reaches the first threshold.

17 . The motor control method according to claim 15 , wherein the stopping includes stopping the motor when the rotation of the motor is detected a predetermined number of times or more and continuously after the elapsed time reaches the first threshold.

18 . The motor control method according to claim 15 , wherein the detecting includes detecting, when the operation request received in a period from power-on of the motor until a lapse of a predetermined time indicates stop of the motor, rotation of the motor before the elapsed time reaches the first threshold.

19 . The motor control method according to claim 15 , wherein the controlling includes not resetting the elapsed time when receiving a new operation request indicating stop of the motor before the elapsed time reaches the first threshold.

20 . The motor control method according to claim 15 , further comprising changing the first threshold depending on a rotation speed of the motor at the detecting.

Assignees

• Nagatsuka Shingo
• Kurosu Kentaroh
• Asano Yoshihiro
• Takahashi Motoharu
• Murata Takuya
• Ricoh Co Ltd

Inventors

• Nagatsuka Shingo
• Kurosu Kentaroh
• Asano Yoshihiro
• Takahashi Motoharu
• Murata Takuya

Classifications

• G03G15/6529 Primary

  Transporting (G03G15/6555 takes precedence) · CPC title

• G03G21/14 Primary

  Electronic sequencing control · CPC title

• G03G2215/0129

  horizontal medium transport path at the secondary transfer · CPC title

• G03G2215/00599

  Timing, synchronisation · CPC title

• G03G15/5004

  Power supply control, e.g. power-saving mode, automatic power turn-off · CPC title