| In recent years, the development of new energy vehicles have gained more and more attention with a series of resources and environmental problems caused by the development of the traditional car, in which the vehicle parts with electric power is an important development direction of new energy vehicles. With the development of new energy vehicles, the structure, drive mode and efficiency of the compressor are put forward new demands as automobile common parts. An effective solution to the above requirement is to change the traditional mechanical driving mode to electric drive.In this paper, a moving-magnet linear oscillatory actuator using to drive the reciprocating piston compressor is studied, and a series of analysis is carried out on the loss and temperature field. Firstly, the structure and working principle of the moving-magnet linear oscillatory actuator and its driving compressor are introduced. The mathematical models of the mechanical system and the electromagnetic system are built. The dynamic characteristic parameters are determined according to the structural parameters. Then the loss of the compressor is analyzed, and the mathematical model of the loss is established. The distribution and variation of the loss of actuator under resonance, locking mover and no-load condition are analyzed using the finite element software. Based on the loss analysis, the temperature field of the actuator is analyzed by means of the coupling of electromagnetic field and temperature field, and the influence of the change of environment temperature on the temperature field of the actuator is studied. On the basis of theoretical analysis, the test bench is built, and the test of locking mover of the prototype are carried out. The maximum relative error between the test results and the simulation results is 5.3%, and the correctness of the simulation results is verified. Finally, the factors affecting the temperature rise during compressor operation are discussed and analyzed. |
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