Title:
AC SERVO DRIVER MOTOR POWER LINE DISCONNECTION DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2004/093302
Kind Code:
A2
Abstract:
There is provided a disconnection detection method capable of reducing the delay of the motor power line disconnection detection. The motor power line disconnection method for an AC servo driver having a current detector and a torque controller is performed as follows. A torque current component (9) is extracted from the three-phase AC current detected by the current detectors (4, 5) and a torque instruction (1) is compared to the torque current component (9). If the difference between the torque instruction and the torque current component exceeds a set value (21), it is recognized that the motor power line is disconnected.
Inventors:
SHIMA NAOKI (JP)
Application Number:
PCT/JP2004/005473
Publication Date:
October 28, 2004
Filing Date:
April 16, 2004
Export Citation:
Assignee:
YASKAWA DENKI SEISAKUSHO KK (JP)
SHIMA NAOKI (JP)
SHIMA NAOKI (JP)
International Classes:
G01R31/02; H02P6/06; H02P6/08; H02P6/12; H02P6/28; H02P21/22; H02P23/00; H02M; (IPC1-7): H02M/
Foreign References:
| EP1292012A2 | 2003-03-12 | |||
| JPH11332002A | 1999-11-30 | |||
| JPH09145893A | 1997-06-06 |
Attorney, Agent or Firm:
Oguri, Shohei (13th Floor ARK Mori Building, 12-32, Akasaka 1-chom, Minato-ku Tokyo, JP)
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