The global trade sector has been working toward ending its dependence on oil. Nevertheless, the demand for fuel continues to increase, and we can expect a scarcity of fossil fuels due to their constantly growing consumption in coming years. As an alternative to existing fuel combustion engines, the present research develops electromagnetic engines. In order to develop an electromagnet engine, it was necessary to analyze different probabilities and calculate the magnetic flux produced by the magnet to deal with the power output of the engine as well as the force required to move the piston. The combined electromagnetic model for motors and rectifiers is presented using the finite element model for the motor and the physical model for the rectifier, then validated with prototype-test results. A mathematical model for linear motors is presented using electromagnetic simulation. This is followed by an analysis of electromagnetic losses during the standard cycle. The linear motor system can be used to convert mechanical into electrical energy with 86.3% efficiency, which corresponds to the requirement of portable free-piston engine generators when the reciprocating frequency is 50 Hz and the reciprocating stroke is 36 mm.