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Title:
SERVO CONTROLLER
Document Type and Number:
Japanese Patent JP2003047269
Kind Code:
A
Abstract:

To provide a servo controller wherein the occurrence of instability due to application of a machine position detector is suppressed and positioning operation is implemented with accuracy at high speed.

A servo system is of full-closed loop wherein a machine 3 driven by a motor 1 is provided with a position sensor 4, and a machine rotational position θL outputted therefrom is inputted to a subtractor 5 and used as a feedback signal. The servo system is provided with a displacement differentiator 10. A torque current correction signal ΔIq* is calculated both from a motor rotational position θM detected by a position sensor 2 and the machine rotational position θL, and is fed back through a subtractor 11 so that the production of mechanical vibration is prevented.


Inventors:
TOBARI KAZUAKI
TAKANO HIROMICHI
Application Number:
JP2001000233785
Publication Date:
February 14, 2003
Filing Date:
August 01, 2001
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
G05D3/12; H02P21/00; H02P21/05; H02P21/22; H02P23/04; H02P23/16; H02P23/18; H02P27/04; H02P29/00; (IPC1-7): H02P5/00; G05D3/12; H02P21/00
Attorney, Agent or Firm:
Ichiro Suzuki (1 person outside)



 
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