Abstract
This paper presents an mathematical model for the prediction of temperature field distribution in spoke-type permanent magnet synchronous machines. The mathematical model takes into account radial heat transfer streams; it is presented as a boundary problem in a multilayer non-canonical region with conjugation conditions at the boundaries of the layers, with different thermal physical properties. The entire study area is divided into five types of simple subdomains, including a shaft, an inner fan-shaped magnet, an outer fan-shaped magnet, a slot opening and a slot. Moreover, on the border of the inner and outer fan-shaped magnets in slot opening and a slot, we have an perfect thermal contact. The problem is solved by the finite element method. Using the results of numerical experiments, the model allows you to control the temperature field of the machine, allows you to calculate the temperature distribution in its individual parts.
Highlights
High-speed electric machines with excitation from permanent magnets are widely used in various industries, including automotive industry
This paper presents an mathematical model for the prediction of temperature field distribution in spoke-type permanent magnet synchronous machines
The problem is solved by the finite element method
Summary
High-speed electric machines with excitation from permanent magnets are widely used in various industries, including automotive industry. Автоматизовані системи управління», випуск 45 investigates the equivalent stator slot model used in temperature field of high torque-density permanent magnet synchronous in-wheel motor. In [7], the influences of temperature variation on the characteristics and performance of spoke-type interior permanent magnet (IPM) machines are analyzed. Key machine performance metrics, such as flux linkages, torque, and inductances variation as functions of the temperature are simulated and discussed In all these works, the complete mathematical model of the thermal process in the permanent magnet synchronous machines was not considered, with the help of which it was possible to determine the temperature regime at any point of it. In this work a complete mathematical model of the thermal process in synchronous machines with spoke-type permanent magnet is investigated.
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