直线增程系统匹配建模与负荷特性研究

The linear extended range system is a new type of efficient, high power density energy conversion system which is directly coupled with free piston engines and a linear motor. In order to reasonably match the system electromagnetic load and improve the system operation stability, the stable operation load limit of the system under the corresponding design parameters was investigated, and the system operation characteristics under different electromagnetic loads were determined. The system thermodynamics coupling simulation model was established using MATLAB/Simulink to determine the system load limit range. The changes in system operating characteristics and performance characteristics as the load changes within the load limit range were obtained. The results show that when the load increases from 392 to 538 N/(m·s^-1), the system operating frequency is reduced from 39.6 to 30.6 Hz, the operating compression ratio is reduced from 15.0 to 6.0, the indicated thermal efficiency is reduced from 41.4% to 31.1%, the system output power is reduced from 9.2 to 5.3 kW, and the indicated fuel consumption rate is increased from 197.6 to 263.0 g/kWh.