- 期刊
迴轉式壓縮機永磁同步馬達之結構模態分析與模型驗證
Modal Analysis and Model Validation of Permanent-Magnet Synchronous Motor of Rotary Compressor
摘要
永磁同步馬達的電磁力是迴轉式壓縮機的激振來源之一，其產生的電磁激振力，會激發馬達結構的自然頻率，引發電磁噪音。欲從電腦輔助工程分析（computer aided engineering, CAE）的角度預測電磁噪音的發生機制，首要的關鍵即是分析模型與實際結構的等效性。本文主要說明CAE應用於永磁同步馬達結構的仿真技術，結合理論模態分析與實驗模態分析（experimental modal analysis, EMA），將模擬與實驗求得的結構模態參數進行比對驗證，確認分析模型的等效性。此外，考慮到馬達結構組成的複雜度，因此將馬達區分為單一矽鋼片板材、定子鐵芯與定子繞線組合三種層次，逐步執行模型的驗證程序。結果顯示，透過單獨定子鐵芯的驗證，釐清矽鋼片堆疊對結構剛性的影響。在定子繞線組合階段，掌握繞線後的振動模態變化，最終建立永磁同步馬達之等效分析模型。本文建立永磁同步馬達結構的仿真技術與驗證流程，有助於提高磁固耦合分析的可行性，提供預測電磁噪音更明確的參考模型。
並列摘要
The electromagnetic force of the permanent magnet synchronous motor is one of the excitation sources of the rotary compressor, and will excite the natural frequency of the motor structure and cause electromagnetic noise. Predicting electromagnetic noise by using computer aided engineering (CAE), the main issue is the equivalence between the analysis model and the real structure. This work discusses the simulation techniques of CAE applied to the structure of permanent magnet synchronous motor, and perform theoretical modal analysis and experimental modal analysis (EMA) to verify the modal parameters obtained from simulation and experiment and confirm the equivalence of finite element model. The model verification of the motor is divided into three levels, i.e., the single layer of stator plate, stator core and the stator assembly. This study shows the vibration modal characteristics of the stacked stator core and stator assembly, respectively, and finally establishes the equivalent finite element model (FE model) of the permanent magnet synchronous motor. This work establishes the simulation technique and verification process of the permanent magnet synchronous motor structure. The validated FE model will help to enhance the feasibility of the magnetic-solid coupling analysis and provide a clearer reference model for predicting electromagnetic noise.