Dynamic Characteristics and Energy Consumption of Electromechanical Converter of High-Speed On/Off Valve Under Multiple Motion Cycles Considering Eddy Current and Hysteresis

The current, electromagnetic force, and dynamic displacement of the high-speed on/off valve’s (HSV) electromechanical converter under stable working cycle are significantly different from those under the initial movement cycle. This phenomenon determines whether the electromechanical converter can continue to operate stably, and it also leads to temperature rise and high energy consumption over long periods of time. Therefore, in this study, a high-precision model is proposed that can fully analyze the characteristics of the electromechanical converter under multiple motion cycles with the consideration of the effects of eddy current and hysteresis. First, the hysteresis loop of the material is tested, and the Jiles–Atherton hysteresis model is identified based on the test data and verified through experiments. Second, the fundamental reasons for the differences in current and electromagnetic forces between initial motion and stable motion are analyzed. On this basis, a new law of dynamic evolution of electromechanical converters under multiple motion cycles is discovered. Finally, the important influence of hysteresis characteristics and eddy current on the dynamic performance and energy loss of the electromechanical converter under multiple motion cycles is analyzed. The effects of frequency, voltage, and external resistance on the dynamic characteristics and energy loss of electromechanical converters have also been analyzed. The results indicate that as the voltage increases, the response time decreases, but the eddy current loss increases. An increase in external resistance will increase response time but reduce eddy current losses. This study can provide a theoretical basis for further improving the performance of electromechanical converters.