Novel magnetic isolation slice for high-speed valve enabling low-current temperature rise suppression and electromagnetic performance optimization

High-speed valves (HSVs) often exhibit excessive steady-state temperature rise and sluggish dynamic response under rated current conditions, which constrain their performance and reliability in high-speed fluid control systems. This paper proposes an innovative magnetic isolation slice structure that significantly enhances the electromagnetic performance of HSVs while avoiding additional temperature rise and ohmic loss. A weighted function method is adopted to model the relationship among current, response time, and temperature, enabling the determination of an optimal operating current to achieve a trade-off between electromagnetic performance and thermal performance. Experimental results demonstrate that, compared with the original HSV structure operating at the rated current, the proposed design reduces the response time by 69.2%, steady-state ohmic loss by 53.3%, and steady-state temperature rise by 51.7%. These findings indicate that the magnetic isolation slice facilitates a coordinated control of thermal and electromagnetic behaviors, providing a practical solution for enhancing HSV performance in high-speed applications.