بحث بعنوان Thermal Characteristics of Switched Reluctance Motor under Different Working Conditions

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Thermal Characteristics of Switched Reluctance Motor under Different Working Conditions
Yukun Sun1, 2, Binbin Zhang1, Ye Yuan1, *, and Fan Yang1

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Abstract|Accurate analysis of the thermal field in switched reluctance motor (SRM) is critical to
the service life and safety performance of the SRM. According to the general structure of SRM, a twodimensional (2D) finite element analysis (FEA) model was established, and the loss of each component,
especially the iron loss, was analyzed by Orthogonal Fourier decomposition method, revealing the
characteristics of the loss. A magnetic-thermal one-way coupling method is further used to model
the temperature of the SRM, and basic assumptions and reasonable boundary conditions are set.
Transient thermal analysis was carried out under natural cooling conditions and high vacuum conditions,
respectively, and the results were compared and analyzed to understand the temperature distribution
of the main components under two operating conditions.
CONCLUSIONS
Aiming at the motor used in this paper and according to the simulation results of SRM temperature field,
we can conclude that the iron loss is mainly distributed on the tooth of stator and rotor, and the iron
loss of yoke is relatively small. Loss of motor is used as a heat source for subsequent temperature fields.
Meanwhile, the simulation of the temperature distribution of SRM under different working conditions
can be concluded:
1) In both cases, the temperature rises rapidly at the beginning, then slowly increases until the steady
state is reached. The maximum temperature appears on the winding, and the temperature of tooth
is higher than the yoke;
2) Under high vacuum conditions, the temperature of each component is about twice as high as that
under natural cooling conditions, and the average temperature of rotor is higher than the stator.
In summary, various parts of SRM temperature distribution tendency are basically identical to
the situation estimated in advance. It is shown that the established model and analysis method are
basically correct and feasible. For other types of motors we can also use the same methods to deal with,
and it has a certain guiding significance to verify whether the motor and its windings can work under
rated conditions for long-term stability.

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