Impacts of structural parameters on the steady magnetic behaviors of a novel high-speed on off valve for clutch shift system

A magnetic network topology numerical analysis model of a novel global type of high-speed on off valve (HSV) in clutch shift system is realized, which is used to analyze the electromagnetic behaviors and energy conversion of structural parameters. The magnetic force exerted on the conventional HSV and innovative HSV are assessed and verified with the data from the test method. A good consistency between numerical analysis and text data makes clear that the magnetic force of innovative HSV is 57.46% higher than that of conventional HSV. Meanwhile, the permanent magnet ring delays the change “inflection point” of total flux and equivalent magnetic resistance, so that the innovative HSV can obtain higher magnetic flux and lower equivalent magnetic resistance. By analyzing the key structural parameters such as the height and thickness of the permanent magnet ring, the thickness of the yoke, the chamfer of the pole flange and the cylindrical length of the sphere, the impacts of the structural parameters under different currents coupling on the electromagnetic energy characteristics are obtained. Increasing the height and thickness of the magnet radiation ring will improve the magnetic force, and the improvement effect is more obvious at high current (6∼8A). Increasing the shell thickness and the chamfer of the magnetic pole flange in a certain range will improve the magnetic flux and magnetic force. Influence of the cylindrical length of the sphere on the magnetic force is mainly dominated by the non-working air gap reluctance and the total magnetic flux.