Patent Number: 8,879,960

Title: Image bearing member drive unit that drives image bearing member, method of controlling image bearing member drive unit, storage medium, and image forming apparatus

Abstract: An image bearing member drive unit which is capable of performing excellent follow-up of random disturbances without increasing the costs and further with reduced energy loss. The image bearing member drive unit is formed by a brushless DC motor, a rotational position detector, a rotary encoder, a drive circuit, a motor driver IC, and a controller. The rotary encoder detects a drive speed of an image bearing member driven by the brushless DC motor. Drive current for the brushless DC motor is controlled according to the detected drive speed and a target speed. When a short brake signal for braking the brushless DC motor is on, current in a direction opposite to the drive current is generated to thereby brake the brushless DC motor.

Inventors: Doshida; Takaaki (Moriya, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: G03G 15/00 (20060101)

Expiration Date: 2019-11-04 0:00:00