PROJECT TITLE :

Induction Machine Characterization for Short-Term or Momentary Stall Torque

ABSTRACT:

The standard knowledge on peak-duty drive design results in vastly oversized machines, following design ways that are based on continuous ratings. This paper investigates induction machine time ratings that enable peak electrical capabilities to be fully attained. The machine transient thermal response is used to spot four heating regimes primarily based on the dominant heat-transfer mode: subtransient, transition, transient, and temperature creep. A robust affiliation between the subtransient mode and $i^2 t$ ratings is presented. The impacts of stator and rotor losses on the top-winding temperature are independently identified. This information is combined into a transient thermal impedance characteristic, which provides time ratings as a operate of stator and rotor losses with but tenp.c error. This method is additionally custom-made for unbalanced offer conditions and rotor-connected excess heating conditions with similar error. An implementation of your time rating info on a drive system is shown to use machine peak ratings. The presented characterizations inform the short-term peak energy density of induction machines.


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