Research on Temperature Rise of Electromagnets Based on Magnetic Particle Grinding Method
1. Research Background
During operation, electromagnets generate heat, leading to temperature rise, which can affect their performance and lifespan. Therefore, studying the temperature rise characteristics of electromagnets and optimizing their design is of significant importance. In recent years, the magnetic particle grinding method, as an emerging processing technology, has been applied to the design and optimization of electromagnets to improve their thermal performance.
2. Optimization of Magneto-Thermal Coupling Parameters
Sun Chao et al. proposed a method based on magneto-thermal coupling simulation to optimize the structural parameters of levitation electromagnets. By establishing a three-dimensional finite element parametric model, the study analyzed the main heat sources of the electromagnet and the calculation methods for heat flux. The research introduced two optimization methods: internal and external clamping. Genetic algorithms were used to optimize the structural parameters to improve the levitation-to-weight ratio and control temperature rise. The results showed that:
After external clamping, the mass of the electromagnet was reduced by 58%, with a maximum temperature of 58.9°C.
After internal clamping, the mass was reduced by 43%, with a maximum temperature of 47.6°C.
The maximum levitation-to-weight ratio after external clamping was 35.45, an increase of 23.18%.
3. Application of Magnetic Particle Grinding Method
The magnetic particle grinding method can effectively reduce eddy current losses and temperature rise by improving the structural design of electromagnets. For example, modifying the structure of the electromagnet using laminated sheets can suppress eddy current generation, thereby reducing temperature rise. Additionally, improving the electromagnet model to a pre-concave structure can effectively reduce levitation control difficulty and further optimize temperature rise characteristics.
4. Other Related Research
Tong Laisheng et al. conducted simulations on the temperature rise of electromagnets under static levitation and constant-speed conditions and proposed an auxiliary cooling device for electromagnets.
References [13-14] embedded permanent magnets in the magnetic circuit of a U-shaped electromagnet, improving the temperature characteristics of levitation electromagnets.
Reference [15] proposed a temperature field simulation modeling method for foil-wound and wire-wound electromagnets, showing that foil-wound electromagnets have better heat dissipation than wire-wound electromagnets.
5. Conclusion
Research on the temperature rise of electromagnets based on the magnetic particle grinding method provides new insights for the design and optimization of electromagnets. By using magneto-thermal coupling simulation and structural parameter optimization, significant reductions in temperature rise can be achieved, enhancing the performance and reliability of electromagnets. Future research can further explore the application of the magnetic particle grinding method in other electromagnetic devices to achieve higher efficiency and lower energy consumption.
