Starting mode analysis of tubular-type linear generator for free-piston engine with dynamic characteristics

The free-piston engine system uses a linear motion of the piston. And the free-piston engine system can guarantee a high efficiency and reliability in the energy conversion process because of the absence of the mechanical motion conversion devices like a crankshaft, a connecting rod, etc. The mover of linear generator move using electric force in the starting mode, because free-piston engine can not start by itself. In this research, starting mode of the tubular-type linear generator for free-piston engine is analyzed with dynamic characteristics.