Motor control device, image forming apparatus, and motor control method
AssigneeRicoh Company, Ltd.
InventorsTatsuya Watahiki, Natsuko Ishizuka
Life of this patent
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Abstract
A motor control device performs drive control of a motor connected to an object. The motor control device includes a rotation detection unit that detects rotation of the motor and outputs a detection signal, a counter unit that receives the detection signal from the rotation detection unit and outputs a count based on the received detection signal, and an error detection unit that receives counts from the counter unit at intervals of a reference period, computes a difference between a present count received from the counter unit and a previously received count, and detects that an error arises in the rotation detection unit when the difference is continuously less than a reference value.
Claims8
A motor control device which performs drive control of a motor connected to an object, comprising:
- a rotation detection unit that detects rotation of the motor and outputs a detection signal;
- a counter unit that receives the detection signal from the rotation detection unit and outputs a count based on the received detection signal;
- and
- an error detection unit that receives counts from the counter unit at intervals of a reference period, computes a difference between a present count received from the counter unit and a previously received count, and detects that an error arises in the rotation detection unit when the difference is continuously less than a reference value.
A motor control method performed by a motor control device which performs drive control of a motor and includes a rotation detection unit that detects rotation of the motor and outputs a detection signal, the method comprising:
- receiving, by a counter unit, the detection signal from the rotation detection unit to output a count based on the received detection signal;
- receiving, by an error detection unit, counts from the counter unit at intervals of a reference period;
- computing, by the error detection unit, a difference between a present count received from the counter unit and a previously received count;
- and
- detecting, by the error detection unit, that an error arises in the rotation detection unit when the difference is continuously less than a reference value.
Dependencies are inferred from the claim text.