Exploration on Matching Characteristics of Slip and Turns of Multistage Synchronous Induction Coilgun

Synchronous induction coilgun (SICG) has received tremendous attention in the military and civilian fields, which can be attributed to their inherent excellent noncontact linear propulsion characteristics. Theoretically, the ferromagnetic projectile can be launched at hyper-speed by multistage coil relay propulsion. However, the consensus of the SICG on low-speed and large-load propulsion has made its medium-high speed launch a controversial topic, hampered in part by lack of in-depth exploration of simulation model. Based on the previous work, this article focuses on the matching characteristics of slip and turns in order to obtain more reasonable parameter design strategy for the high-speed SICG. First, the numerical simulation model of multistage SICG is constructed on the premise of idealized assumptions to describe the energy conversion process. Then, the concept of slip is explained and the calculation formulas of slip and turns are derived, respectively. Finally, the operating characteristics of the two matching strategies of slip and turns are analyzed. The conclusions obtained by theoretical derivation and simulation comparison can provide reference for the design of medium-high speed SICG.