Electricity: motive power systems – Linear-movement motors
Reexamination Certificate
2005-06-29
2008-10-21
Masih, Karen (Department: 2837)
Electricity: motive power systems
Linear-movement motors
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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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.
Nagato Yoshifumi
Nomura Yuki
Shoda Kazuo
Masih Karen
THK Co. Ltd.
Westerman, Hattori, Daniels & Adrian , LLP.
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