永磁活塞机械-电力发动机额定工况的动力特性

Dynamic characteristics of permanent magnet piston mechanical-electric engine under rated working condition

基于传统的活塞式内燃发电机组,设计一种新型动力装置——永磁活塞机械-电力发动机,对其动子组件建立发动机系统动力学模型和电动力学模型,通过编程和有限元建模,对额定工况(曲轴转速为3600 r/min)下的静磁场特性、空载特性和负载特性进行仿真分析,得到空载感应电动势、负载电流电压、电磁推力、额定输出功率和损耗等。结果显示,额定工况下机械输出功率为3660.224 W,输出转矩为9.71 N·m,由于电磁损耗,比原发动机的机械输出功率(3700 W)和输出转矩(9.82 N·m)略有减少,但不影响正常工作。该新型动力装置不仅输出机械动力,还增加了电动力输出,电输出功率为20.33 W,达到双元动力输出,验证了该新型动力装置结构的可行性。

The permanent magnet piston mechanical-electric engine is composed of a piston type internal combustion engine and a linear generator to achieve the purpose of outputting both mechanical energy and electrical energy. The system dynamics model and electrodynamics model of the engine are established. Through programming and finite element analysis, the static magnetic field characteristics, non-load characteristics, load characteristics under rated operating conditions(the crankshaft speed is 3600 r/min) have been simulated and analyzed. It is calculated that the mechanical output power of the new-type engine is 3660.224 W and the output torque is 9.71 N·m under rated conditions, while the mechanical output power of the original engine is 3700 W and the output torque is 9.82 N·m. The comparison between the two engines shows that due to the effect of electric power, the mechanical output power and torque of the new-type engine are only slightly reduced, and normal operation is not affected. However, the new-type engine has increased electric power output, and the electric output power is 20.33 W, achieving dual power output, which verifies the feasibility of the new-type engine structure.