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Title:
CONTROLLER OF PRODUCTION APPARATUS AND STOP CONTROL METHOD OF MOTOR FOR PRODUCTION APPARATUS
Document Type and Number:
Japanese Patent JP2011200030
Kind Code:
A
Abstract:

To provide a controller of a production apparatus, which can quickly stop a motor with a simple structure even if a fault occurs in a position detector.

The controller operates a dynamic brake (S5) at first if abnormality of the position detector is determined (S1:YES), and estimates a present electric angle θE of a servo motor from values of the respective phase currents of the servo motor, which are detected during a braking period, concretely, from a ratio of respective phase currents Iu, Iv and Iw (S6 to S9). When the dynamic brake is canceled, counter torque braking is performed in accordance with the estimated electric angle θE (S12).


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Inventors:
SAHASHI YOSHIHIDE
Application Number:
JP2010064300A
Publication Date:
October 06, 2011
Filing Date:
March 19, 2010
Export Citation:
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Assignee:
DENSO WAVE INC
International Classes:
H02P3/20; H02P3/18; H02P3/22
Domestic Patent References:
JP2008079434A2008-04-03
JPH1175394A1999-03-16
Attorney, Agent or Firm:
特許業務法人 サトー国際特許事務所