Induction coil launcher is a kind of transmitter which uses electromagnetic energy to propel armature. The thrust of common three-stage coil launcher is not smooth and stable enough during acceleration, and the driving coil is easy to be damaged with the increase of speed and thrust. In this paper, a design scheme of two-section three-stage combined synchronous induction coil launcher is designed, and then the field circuit coupling calculation is carried out by using the finite element simulation software. The waveforms of the electromagnetic force and the armature speed of the common three-stage coil synchronous induction transmitter and the newly designed transmitter are compared. The results show that the two-section three-stage combined synchronous induction coil transmitter can produce more thrust to the armature, and the waveform of thrust and acceleration variation characteristics is smoother and more stable.And the two-section three-stage combined design can disperse the radial force of the coil, so that the driving coil is not easy to be damaged. The results of physical experiments verify the credibility of the simulation results.
