Design Of High Efficiency And High Cost Performance Permanent Magnet Synchronous Motor For Emulsion Pump

As an important equipment in the underground work,the performance of emulsion pump directly affects the efficiency of comprehensive mechanized mining.The existing emulsion pump station is generally driven by three-phase asynchronous motor.Compared with three-phase asynchronous motor,permanent magnet synchronous motor has the advantages of simple structure and reliable operation,small volume and light weight,low loss and high efficiency,flexible shape and size.The selection of different magnetic circuit structures and permanent magnet materials can also reduce the cost effectively.The motor designed in this paper is a 200 k W motor with a rated speed of 1500 revolution per minute for emulsion pump.According to the Y series manual,the frame number is 315.In order to save cost and reduce volume,frame # 280 is adopted.Although this cost is saved,it also has certain disadvantages.In order to achieve the same output and comprehensively improve the cost performance,the main work of this paper is as follows:Firstly,the influence of structural parameters of permanent magnet motor for emulsion pump on the electromagnetic performance of the motor is analyzed.The effects of air gap length is different for the different types of motors.The permanent magnet synchronous reluctance motor is greatly affected by the air gap length,the effects of different air gap lengths on electromagnetic performance are compared by finite element method.The electromagnetic performance of the motor is affected by different shapes of magnetic barriers,the number of layers of magnetic barriers and the rib width between magnetic barriers.The influence of magnetic barrier structures(U-shaped,V-shaped and C-shaped)and different numbers of plies and rib width between magnetic barriers on the electromagnetic performance of the motor are analyzed,and the effects of permanent magnet parameters on electromagnetic performance are compared.Secondly,the heating and cooling system for emulsion pump are studied.The effects of slot width,air gap length and pole-slot combination on stray loss are analyzed.The variation trend of copper loss and iron loss under different stator crack ratios and different length-diameter ratios is analyzed,and the sum of copper loss is conducive to the improvement of efficiency.By reducing the frame number,the volume of permanent magnet motor will be reduced,but it will also bring the problem of heat dissipation difficulty.The water-cooling system of the motor is analyzed and select the appropriate water-cooling structure.Through the temperature field simulation calculation,it is required that the water-cooling structure can meet the temperature rise requirements of the motor.Through the simulation calculation of temperature field,it is verified that the water-cooling structure can meet the temperature rise requirements of motor.Finally,an efficient and cost-effective permanent magnet synchronous motor for emulsion pump is designed.According to the previous contents and conventional design methods,the main dimensions of the motor,pole slot matching,stator punching,air gap length are determined.Using the finite element analysis model,the motor is simulated and analyzed under no-load and load condition.