Optimizing Motor Thermal Models

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type 01 Sep 2006Publisher:IEEEJournal:2006 Record of Conference Papers - IEEE Industry Applications Society 53rd Annual Petroleum and Chemical Industry Conference

Authors: Stanley E. Zocholl;

doi: 10.1109/pcicon.2006.359713 , 10.1109/icps.2007.4292097

Optimizing Motor Thermal Models

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Abstract

The thermal limitations of induction motors are specified by thermal limit curves that are plots of the limiting temperature of the rotor and stator in units of l2t. This paper discusses the thermal protection provided by rotor and stator thermal models defined by the thermal limit curves and supporting motor data. The thermal model is the time-discrete form of the differential equation for temperature rise due to current and is derived from fundamental principles as shown in the Appendix. The rotor model derives the slip-dependent l2r watts using voltage and current that permit the safe starting of high-inertia drive motors. The performance of the models is shown in constant and cyclic load tests.

Related Organizations

Schweitzer Engineering Laboratories
United States

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