Induction motor control apparatus and method for restart when ro

Electricity: motive power systems – Induction motor systems – Primary circuit control

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318808, 318812, H02P 534

Patent

active

046848681

ABSTRACT:
AC induction motor energized by an inverter coupled with a DC power source. Upon shutdown of the inverter because of a fault condition or a rail gap between adjacent power sources, if the motor rotating frequency is greater than a minimum frequency then a decreased motor voltage is applied to the motor and increased as a ramp over a provided time delay period, after which the motor slip is controlled to provide a desired motor torque that is increased over a subsequent time delay period.

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