Numerical study on electromagnetics and thermal cooling of a switched reluctance motor

Abstract

a b s t r a c tIn this study, the coupled thermomagnetic system of a switched reluctance motor for cooling performance improvement has been conducted numerically. The switched reluctance motor (SRM) with output power of 3 kW and air cooling is under investigation. Aluminum cooling fins are fitted on the cooling casing of the motor in order to increase the convection surfaces. The commercial softwares used in this paper are JMAG-Designer and CFD-RC for electromagnetic field and thermal field analyzes, respectively. The electromagnetic analysis for the switched reluctance motor is obtained in advanced in order to obtain the energy losses. They can then be treated as the heat sources for heat transfer analysis. Transient solutions for the temperatures of the components in SRM are calculated during operation. The transient temperature of SRM is analyzed for both with and without cooling casing. The influence of forced convection by the internal fan of the SRM is also under investigation. Results show the numerical model is in good agreement to the real practice. The model can be used for the SRM cooling design.

Improvement on the heat dissipation of permanent magnet synchronous motor using heat pipe

“…As far as end winding is concerned, efficient heat transfer enhancement method is necessary. This conclusion is also reported by Jang et al 6 They found the traditional cooling case has little influence on the end winding temperature reduction.…”

“…As far as end winding is concerned, efficient heat transfer enhancement method is necessary. This conclusion is also reported by Jang et al 6 They found the traditional cooling case has little influence on the end winding temperature reduction. Figure 6(b) and (c) are the temperature distribution of a single slot winding and the cross section temperature distribution of a single slot winding near the end winding.…”

“…It is shown that the overall heat transfer improves significantly with the magnet thickness ratio increasing and deteriorates with the magnet angle ratio increasing. Jang et al 6 investigated numerically the cooling performance improvement for a coupled thermomagnetic system of a SRM with output power of 3 kW and air cooling by commercial software JMAG-Designer for electromagnetic field and CFD-RC for thermal field analyzes. The obtained energy losses were treated as the heat sources for heat transfer analysis.…”

Thermal Characteristics of Switched Reluctance Motor Under Different Working Conditions

“…Refs. [16][17][18][19] introduced the temperature distribution of the motor under different conditions. However, the radiation heat dissipation is a nonlinear problem, and the finite element model is quite complicated to build.…”

One-dimensional Lumped-Circuit for Transient Thermal Study of an Induction Electric Motor

“…In addition, an overheating of a motor is directly linked to the degradation of its performances [1][2][3]. Thus, in order to reduce such a limitation and avoid the damage of the device, it is necessary to gather the thermal analysis to the electromagnetic study during design process [3][4][5]. Indeed, the prediction of the temperature distribution in the different parts of the machine allows us to evaluate if the machine will reach the thermal class for which it is being designed and also to check if the supplied air flow of the cooling system is sufficient to a normal operation at rated conditions.…”