Development Of Permanent Magnet Synchronous Motor State Detection Test Platform

In recent years,research on permanent magnet synchronous motors has been actively carried out at home and abroad,and good research results have been achieved.Permanent magnet synchronous motor has the advantages of high efficiency,high performance and low noise,which is widely considered as the development trend of motor in the future.With the continuous development of rail train technology,the application of permanent magnet synchronous traction motors in rail trains is becoming more and more extensive.However,the research on the state detection of permanent magnet synchronous motors in China is relatively weak,and there is a lack of effective motor state detection methods and evaluation criteria.In this paper,a simple and convenient method of motor state detection and evaluation after maintenance is proposed for the problem of whether the permanent magnet synchronous motor can be loaded after maintenance,hoping to provide some help to the train maintenance department.Aiming at the problem of whether the permanent magnet synchronous motor can be loaded after maintenance,the evaluation method of mechanical performance state,typical operating parameters and inherent electrical parameters of the motor after maintenance is proposed.According to the proposed evaluation method,this paper designs the test of typical operating parameters and inherent electrical parameters of permanent magnet synchronous motor after maintenance.According to the proposed state detection test,combined with the test environment,an energy mutual feedback permanent magnet synchronous motor state detection platform is designed,and a universal and modular test platform is built by using SIEMENS S7-300 PLC,SIEMENS S120 frequency conversion system,Yaskawa frequency converter,etc.,to meet the detection requirements of typical operating parameters and inherent electrical parameters of permanent magnet synchronous motors that meet the requirements of mechanical properties after maintenance,and to identify the inherent electrical parameters of the motor.According to the test results,the comprehensive evaluation of the motor state after maintenance is realized.The construction of the test platform includes the design and construction of the platform power structure,the accompanying system and the test system.The programming in STEP7 and the debugging of STARTER software realize the communication between hardware.The control system and acquisition system of the platform are designed and developed by Lab VIEW.The construction of the test platform hardware can meet the requirements of motor state detection,and the resource utilization rate is high.The development of the test platform measurement and control program should have certain modularity and versatility.Changing the program of its interface module can be used on other platforms.The evaluation and detection methods of permanent magnet synchronous motor state after maintenance,as well as the conception of test platform,hardware construction,software development and communication between modules proposed in this paper have certain universality,which provides some reference for the latter to study the state detection of permanent magnet synchronous motor and the construction of test platform.