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US 11,958,715 B2Granted
Drive mechanism, fixing device, conveying device, and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorRyohsuke Kawasaki
Life of this patent
Estimating the term…
Abstract
A drive mechanism that drives a rotator to rotate includes a main motor, an assist motor, and processing circuitry. The main motor drives the rotator. The assist motor drives the rotator and assists a drive of the rotator by the main motor. The processing circuitry controls a speed of the main motor so that a rotational speed of the rotator is constant, and controls a motor voltage of the assist motor so that the motor voltage of the assist motor changes according to a change in a motor current of the main motor.
Claims10
A drive mechanism configured to drive a rotator to rotate, the drive mechanism comprising:
- a main motor configured to drive the rotator;
- an assist motor configured to drive the rotator and assist a drive of the rotator by the main motor;
- and
- processing circuitry configured to:
- control a speed of the main motor so that a rotational speed of the rotator is constant;
- and
- control a motor voltage of the assist motor so that the motor voltage of the assist motor changes according to a change in a motor current of the main motor,
- wherein a reduction ratio in transmitting a drive from the assist motor to the rotator is a value such that an adjustment range of an assist amount of the assist motor assisting the drive of the rotator by the main motor is equal to or larger than a predetermined width.
5 more elements
Dependencies are inferred from the claim text.