Fault handling of inverter driven PM motor drives

Details Fault handling of inverter driven PM motor drives Fault handling of inverter driven PM motor drives

2007-10-09

2007-10-09

Ip, Paul (Department: 2837)

Electricity: motive power systems

Positional servo systems

With protective or reliability increasing features

C318S565000, C318S616000, C318S563000, C388S804000, C361S023000

Reexamination Certificate

active

11462432

ABSTRACT:
An apparatus includes a multi-phase inverter, a fault detector to indicate a detection of a fault, a sensor to provide a speed signal indicative of whether a speed of a PM motor is greater than a transition speed, and a controller. The controller is operable to apply either an open-circuit response or a short-circuit response to the multi-phase inverter. The open-circuit response is applied when the speed of the PM motor is greater than the transition speed and a fault is detected. The short-circuit response is applied when the speed of the PM motor is less than the transition speed and the fault is detected. The transition speed is either a fixed predetermined speed or an adjusted predetermined speed.

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