Power losses and dynamic response analysis of ultra-high speed solenoid injector within different driven strategies

Abstract Power losses are crucial to evaluate the power efficiency and comprehensive performances of the ultra-high speed solenoid injector, and they also can be used to check the rationality of the magnetic circuit structure and driven strategies. However, the power losses cannot be measured directly. In this investigation, a driver within four different driven strategies have been designed to analyze the relationship between the power losses and dynamic response of the ultra-high speed solenoid injector. The transient electromagnetic FEM (Finite Element Method) was used to calculate the power losses, temperature distribution and dynamic response of the ultra-high speed solenoid injector. The total loss distribution and the variation trends of the current were analyzed, and different types power losses were investigated to distinguish how the driven strategies impact on the power losses and dynamic response of the solenoid injector. The simulation results show that, when solenoid injector worked within different driven strategies, there were remarkable differences to the power losses, and then caused different performances for the injector. Because the power losses cannot be measured directly, the simulation results of current and dynamic response were validated by comparing to the experimental results. The results indicated that, the simulation results were good agreement to the experimental simulation before closing. However, the calculated current and displacement were larger than experimental measurement at the end of closing, caused by the critical value of the air gap.