SPWM Control Rectification Technology of Free Piston Stirling Linear Generator Connected with DC/DC Converter for Storage Energy

With the increasing concern about fossil energy consumption and environmental pollution worldwide. In this case, a Stirling engine with diversified heat sources and low pollution has been developed, and the Free Piston Stirling Linear Generator (FPSLG), which can be directly connected with the Stirling engine and can save the intermediate mechanical transmission mechanism, has been used to form a power generation system with the Stirling engine. The FPSLG can realize the direct conversion of all kinds of heat energy to electrical energy by coupling the power piston of the free-piston Stirling engine and the mover of the linear motor. In this paper Sine Pulse Width Modulation (SPWM) control methods adaption to the AC/DC rectifier and the two-loop PI control method adaption to the buck-boost dc/dc converter used for renewable energy conversion is proposed. The idea is to convert this renewable energy into electrical energy, the FPSLG with rectifier and the bidirectional buck-boost converter delivers a stable DC voltage of 48Volt to the storage battery. Finally, to confirm the offered control approach and simulation results, the two control strategies are confirmed. The testing and implementation of the SPWM technique for the Source Voltage Rectifier (SVR) and the two-loop PI technique used for the dc/dc converter were presented and the result was confirmed. The SPWM strategy has been used for converter link linear generator converter and as well storage battery side converter used two-loop PI controller.