Investigation into the thermal optimisation of low eddy current structure of high-speed on/off valve considering energy consumption and dynamic characteristics

In this paper, the coupling characteristics between various physical fields of HSV are analysed by combining theoretical research and numerical simulation, and the laws of heat generation, temperature rise, and dynamic characteristics are revealed. The low eddy current slit structure is further designed to solve the problem of serious heat generation in the HSV, and the multi-objective thermal optimisation is carried out for the number of slits, the width and the depth of slits of the slit structure by taking into account of the energy consumption and the dynamic characteristics through orthogonal experiments. The results show that the response time of the low eddy current slit structure is shortened by 0.9 ms, a decrease of 5.42%, and the coil temperature rise is reduced by 89°C, a decrease of 37.24%, compared with that of the original structure under the three-voltage, 250 Hz driving mode.