The Reverse Research Of Key Structure Parameters Destabilization Range Of Permanent Magnet Linear Synchronous Motor Based On Special Working Condition

Nowadays,manufacturing industry needs better machining quality and enterprise needs better product quality.It is not only the requirement of users but also the level of national manufacturing.The manufacturing precision of machine tools decides the quality of the product directly.Compared with traditional rotating motor with synchronous belt and ball screw,permanent magnet linear synchronous motor(PMLSM)are more used in two axis numerical control machine tools for the reason that it can straight line motion directly.However,special structure of PMLSM causes flux density in air-gap no sinusoidal.Development of PMLSM is limited by destabilization in permanent magnet(PM)、armature coils and air gap which influence output performance of PMLSM.A reversal method about thrust ripple of PMLSM used in special system was designed in this article.Extreme key structure dimensions of PMLSM was calculated which is used to guide tolerance zone selection.Firstly,the equivalent magnetic circuit method was introduced and key structure parameters of PMLSM were selected.Secondly,intended sizes of key structure parameters were selected by parameterized scanning models.Thirdly,extreme dimensions were calculated which are used in special system.Lastly,PMLSM was produced whose property was tested in the testing platform.Specific jobs were carried out as following:(1)Research status at home and abroad、operating principle and key structure of PMLSM was presented.Research status of the title at home and abroad was summarized.Main research content was given at last.(2)The equivalent magnetic circuit method was introduced which was used to analyze outputting performance of PMLSM.Key structure parameters were selected and the influence from destabilization of key structure parameters to output performance of PMLSM was analyzed.(3)The parameterized scanning model was introduced.Three key structure parameters were studied through the model.Optimum dimensions were achieved according to the optimum outputting performance in which thrust ripple was considered.(4)Equation of mover was researched and the PMLSM is used in laser control system.In this consideration,extreme outputting performance of PMLSM was calculated.Based on the results get from parameterized scanning model,the second order regression equation was acquired.Both the extreme outputting performance and the second order regression equation were used to inversing calculate extreme dimension.The extreme dimension was verified through simulation model.(5)Components of PMLSM which are designed by extreme dimension were product and PMLSM was packaged and size of components was measured.Testing platform of PMLSM was built which includes back EMF testing platform and thrust one.Both back EMF and thrust were gotten from the testing platform.Offline data processing was need after getting data.Result shows that outputting performance of PMLSM is influenced by destabilization in key structure parameters.As for PMLSM,not only selection of Optimal key structure parameters but also disturbance range based on request of outputting capability of PMLSM is significant in PMLSM manufacture.