Characteristics analysis of heat-fluid-solid coupling field for linear resonant testing platform

Efficient cooling method helps to improve the output performance of a motor, and liquid cooling is one of the best cooling methods. In this paper, a linear resonant testing platform is proposed to simulate the reciprocating motion of the linear oscillating motor, in which two check valves are adopted to achieve the cooling oil circulating. The thermal model is presented to calculate the thermal distribution of the testing platform in the condition with and without cooling oil for different current inputs. Shear stress model of the oil is built and mixing losses is systematically calculated to analyze the fluid damping characteristics. The relationship of the pressure, driving force, viscous, wall shear stress and mixing losses with the oil velocity is detailedly analyzed. The thermal analysis and fluid mixing losses formulation of the testing platform provide theoretical references for the design optimization and work efficiency improvement of the linear oscillating motor.