Anomaly detection method and motor control device

Electricity: motive power systems – Linear-movement motors

Reexamination Certificate

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C318S717000, C318S560000, C318S611000

Reexamination Certificate

active

07439693

ABSTRACT:
A control unit of a motor driver performs feedback control to supply current to a linear motor based on a detection value of a linear encoder. An anomaly detection unit monitors the supply current to the linear motor, and the anomaly detection unit detects anomaly of a linear motion apparatus based on a waveform of the supply current. In the case where the anomaly is detected, a user is notified of warning by means of a lamp, a buzzer, an e-mail, and the like. Therefore, the anomaly of the linear motion apparatus can be detected early and accurately.

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International Search Report of PCT/JP2005/011970, date of mailing Oct. 11, 2005.
Translation of International Preliminary Report on Patentability dated Jan. 9, 2007of International Application No. PCT/JP2005/011970.
Office Action issued Mar. 21, 2008 in counterpart Chinese Application 200580021945X.

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