An Electric Motor Thermal Management System for Hybrid Vehicles: Modelling and Control

The HEV e-motor's internal temperature significantly influences its torque/power capabilities. The dominant heat sources are located within the e-motor stator windings and create 'hot spots'. To keep the motor functioning properly without exceeding the established temperature limits, a new cooling concept for PM e-motors featuring advanced controllers is proposed. Firstly, a reduced-order finite element model describes the e-motor's thermal behavior. Next, an optimal regulator calculates the ideal (target) heat removal rate at its cooling surface. Lastly, a nonlinear tracking controller governs the cooling system operation. Numerical simulation has been conducted to validate the cooling concept. In the urban assault cycle, the stator hot-spot temperature is stabilized with an average error of 0.13°C and a 68% power consumption reduction achieved when compared to classical control. Similarly, the cooling system power consumption is reduced by 28.9% with the proposed controllers for the convoy escort driving cycle.


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  • Accession Number: 01626494
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 2 2016 9:26AM