Design And Inplementation Of Permanent Magnet Material Magnetic Static Parameters Test System

With the development of science and the continuous improvement of social productivity, The application of permanent magnet material has become increasingly widespread. Therefore, the precise measurement of static magnetic parameters of the permanent magnet become very important. The topic from the practical application, designed a permanent magnetic material static magnetic parameters measurement system, the system can be accurate, stable and efficient for data measurement.Firstly, the paper describes the development of magnetic materials, leads the research background and significance of the subject, And combined with the domestic and foreign development present situation, and analysis the shortcoming in our country. For signal collection problems, designed the J coil and H coil; For analog integrator drift problem, designed a digital integrator replace the analog integrator, and using the compound trapezoidal integral algorithm to calculate the magnetic flux.Secondly, expound the hardware about the system in details. Including system power circuit, filling demagnetization system circuit, signal collecting and processing module circuit, main control module and communication circuit. Then introduced the system software design; Software design including each module design, realized the automatic measurement of the system and communication between the upper and lower position machine.Finally, the samples test has been completed. The experiment made the sample tested repeatedly, then make the results of the test compare with the results of the third part, the results shows that the sample remanence,coercivity magnetic induction, intrinsic coercivity,errors about 0.5%, the maximum energy product error lower than 1%. Its better than GB, so the magnet material magnetic parameters testing system meets the actual requirements and have many advantages, such as,high accuracy,good stability and easy to operate.