بحث بعنوان Thermal Analysis of Bearingless Switched Reluctance Motor

بحث بعنوان
Thermal Analysis of Bearingless Switched Reluctance Motor
Binbin Zhang and Zewei He
Abstract—A bearingless switched reluctance motor (BSRM) has the same body structure as a switched
reluctance motor (SRM), but the winding method is different. The accurate analysis of thermal
characteristics is especially important for the service life and safety performance of the two motors.
According to the initial design parameters, the initial size calculation equations of SRM and BSRM
are given, and the ontology design parameters are obtained according to the same design goal. The
two-dimensional finite element model is established, and the stator rotor iron loss is analyzed. The
distribution characteristics of iron loss of SRM and BSRM are summarized. Secondly, the threetemperature field model of the motor is built, and the reasonable boundary conditions are set. The
temperature distribution law of the two motors is analyzed. It is concluded that the BSRM components
have lower loss and lower temperature rise under the same design target.
CONCLUSION
The main dimensions design equations of SRM and BSRM are introduced in this paper. The main
design parameters of the two motors under the same design target are given. The magnetic density
variation of the typical position of the stator and rotor is analyzed, and the iron loss distributions of
SRM and BSRM are analyzed by FEA. The results are verified, and the results show that the BSRM
loss is lower, and the efficiency is higher at the same speed.
On the basis of the loss analysis, the temperature field of SRM and BSRM under natural air-cooling
conditions is analyzed by magnetic-thermal unidirectional coupling method to obtain the temperature
distribution of the main components of the motor. The results show that the temperature of each
component of BSRM is lower than SRM when it reaches steady state, which is more suitable for high
speed environment. The accurate modeling of the temperature field of the switched reluctance motor
provides a theoretical reference for the motor optimization design. At the same time, it is necessary to
take certain measures to improve the temperature grade of the material and design the corresponding
cooling method to reduce the overall temperature of the motor. It has reference significance for the
application of the motor in different environments.

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