Study On The Character Of Permanent Magnetic Coupler Applied To Pumping Unit

Pumping unit requires a higher starting torque and its load is cyclical fluctuations atwork. To achieve saving energy and improve the motion characteristics, permanent magneticcoupler should be used on pumping unit. This paper carries out researching work aboutdriving theory of permanent magnetic coupler. This paper calculates the magnetic fieldintensity of eddy field, torque, loss of the power using the MATLAB programmingcalculation. The relational curves of different speed and torque and loss power are obtainedunder different gap. The3D simulation model of permanent magnet magnetic coupler is builtand is analyzed by electromagnetic field finite element simulation software. The magneticflux density distribution, current density distribution and eddy current loss distribution mapare obtained under4mm gap and200rpm of speed difference. The relational curves are drewand analyzed about different gap and speed difference influence on the permanent magneticcoupler output torque and output power loss. The model machine of permanent magneticcoupling is designed according to pumping unit, and then a large number of experiments weredone, the relational curves of input and output rotational speed and torque, the torque and theinput and output power and output torque and efficiency are obtained. The startingperformance of the permanent magnetic coupler is investigated experimentally. It shows thatStarting performance of the permanent magnetic coupler is very prominent. The results of thetheoretical analysis, simulation analysis and the measured data are compared and analyzed, asort of analysis method is built preliminary, and the understanding about driving charactersand influencing factors is deepened.