Temperature distribution in hard disk head influenced by voice coil motor heat generation

Abstract

The Head Suspension Assembly generates heat in parts of the Voice Coil Motor and Slider and heat is transferred by conduction through bearings to the Hard Disk Base Plate. It is also transferred by convection through the air circulation away from the other components within the hard disk as well. This article is to study the temperature distribution in the head and study the impact of a slider on the thermal trend of coils in the temperature range from 40 to 180 °ซby using the principle of finite elements. The results will be used as boundary conditions to study the problem of air flow in the next step. Finite element equations are generated by considering the heat conduction and convection. Then the solution is found by the Galerkin approximation by computing the temperature distribution in the steady state. It was found that the temperature in the coil changes the distribution in the steady state. It was found that the temperature in the coil changes the temperature distribution to the Arm Block in the same way, but the amount varies. The temperature acting on the bearings has a maximum of 138 °C, while the ends of the heads are in the range of room temperature so that the heat from the coil does not affect the slider.