Study on Generating Characteristics of Free-Piston Engine Generator

In order to increasing the energy efficiency of Free-piston engine generator (FPEG), an experiment was taken on to study the generating characteristics for it is one of the most impressive factors. The results show that: The aptitude of phase voltage is related with velocity of piston and flux of linear generator, phase difference is 120 degree; the piston is not moving in uniform motion; the velocity around TDC and BTD has obviously different; with the work frequency increase, the output phase voltage is increasing; when the external resistor is equal to interal resistor, the output power reaches it maximum.