低速永磁力矩电机转矩波动测试方法分析-电气工程专业论文.docxVIP

哈尔滨工业大学工学硕士学位论文 哈尔滨工业大学工学硕士学位论文 - - II - Abstract Permanent magnet torque motor with its characteristics of high torque density, fast response, without intermediate gear，is getting more and more widely used in the field of precision mechanical transmission system such as CNC machine tools and elevator traction. However, due to the load is directly connected to the permanent magnet torque motor, the torque ripple generated by its own will be delivered directly to the load, and then there is an impact on the control system, reducing its control accuracy. Thus, accurate measurement of torque ripple has become a prerequisite for precision control on the system. In this paper, a research on the measurement for the permanent magnet torque ripple has been conveyed, main contents are as follows. Firstly, Summed up and compared the current torque ripple measurement method, did analysis of the generating mechanism on the torque ripple of permanent magnetic torque motor, including cogging torque ripple, the torque ripple caused by the mechanical factors of manufacturing and assembly process and the electromagnetic factors. The generating mechanisms on the torque ripple generated by sine wave drive and square wave drive are studied and compared. Then elaborated on the principles of strain gauge torque sensor, which is the core of the system. Secondly， as the balanced direct measurement method is proposed, the principle features are shown, the effect between the system and the different number of harmonics is studied. And a measurement system based on given indicators is designed, including the selection of the various parts as well as part of the design of mechanical transmission. Then did the research on the dynamics of the system, system theoretical error and improvements are given. Thirdly, the dynamic equations of the measurement system used by lumped parameter is established, a virtual prototyping system of the test method is built by using the ADAMS software. Some