Multi-Physical Field Simulation and Temperature Field Analysis of Mining Traction Transformers

To enhance the operational safety and reliability of traction transformers for shearers, the thermal source mechanism of these transformers was thoroughly analyzed. A multi-physics model of the transformer was established. For the water-cooling solution in the base layer of the transformer housing for shearers, simulations of the temperature rise in the core and high/low-voltage windings were conducted, with the distribution of the transformer's temperature field and fluid field visualized. The results indicate that the core and high/low-voltage winding regions of the shearers' transformers exhibit local maximum temperature points, with the highest temperature rise in the B-phase winding, while the A- and C-phases show lower values. However, due to the rectangular structure of the A- and C-phase windings, temperature variations exist across different orientations, with higher temperatures near the B-phase end. These findings provide a reference for the temperature monitoring design of shearers' transformers.