Optimizing Motor Thermal Models

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 l 2 t. This paper discusses the thermal protection provided by rotor and stator thermal models defined by the thermal limit curves and supp...

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Main Author: Zocholl, S.E.
Format: Conference Proceeding
Language:English
Subjects:
Conductors
Differential equations
Induction motors
Motor Protection
Protection
Protective relaying
Resistance heating
Rotors
Stators
Temperature
Thermal engineering
Thermal Models
Thermal Protection
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description 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 l 2 t. 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 l 2 r 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.
doi_str_mv 10.1109/ICPS.2007.4292097
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identifier ISSN: 2158-4893
ispartof 2007 IEEE/IAS Industrial & Commercial Power Systems Technical Conference, 2007, p.1-9
issn 2158-4893
2158-4907
language eng
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source IEEE Xplore All Conference Series
subjects Conductors
Differential equations
Induction motors
Motor Protection
Protection
Protective relaying
Resistance heating
Rotors
Stators
Temperature
Thermal engineering
Thermal Models
Thermal Protection
title Optimizing Motor Thermal Models
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