Motor power line break detection method in AC servo driver

Details Motor power line break detection method in AC servo driver Motor power line break detection method in AC servo driver

2007-11-27

2007-11-27

Donovan, Lincoln (Department: 2837)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

C361S023000, C361S001000, C318S800000, C318S434000, C318S432000

Reexamination Certificate

active

10553296

ABSTRACT:
An object of the invention is to provide a break detection method capable of lessening a delay of motor power line break detection.According to the invention, in a motor power line break detection method of an AC servo driver including a current detector and a torque controller, a torque current component9is extracted from a three-phase AC detected by current detector4, 5,a comparison is made between a torque command1and the torque current component9,and if the difference between the torque command and the torque current component exceeds a setup value21,it is recognized that a motor power line is broken.

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