- 學位論文
電動車可調速驅動系統傳導EMI強度數值模擬研究
Numerical Analysis of EV ASD system conducted EMI
摘要
在各種電動車輛中，可調速驅動系統是不可或缺的系統，並且有別於傳統汽油引擎車，是電動車系統中多出來的雜訊源，其干擾程度遠比其他電子元件來的強許多，因此如何在設計階段能夠透過數值模擬方法將ASD系統之傳導EMI強度與頻譜分佈(150kHz~30MHz)進行了解，也是很重要的課題。 本研究利用Simplorer系統級電路模擬軟體，針對台大Green Jumper電動車ASD系統傳導EMI進行系統級模擬。其中包含驅動器內部IGBT開關特性動態模型、交流馬達高頻等校模型、對機殼耦合參數、減震電路、電力線模型等。根據分析結果，可以成功在150kHz~30MHz當中準確模擬傳導EMI之強度，實驗結果與模擬誤差為10dBuV以下，證實本研究使用之傳導EMI建模方法可有效在設計階段模擬，以提供設計人員設計濾波器之參考。 在實測方面，在車輛研究測試中心之S1電波隔離室當中進行傳導EMI測試，先確認背景雜訊量可符合測試要求，在進行電動車ASD系統EMI實測，獲得傳導EMI的數據與頻譜分布。
並列摘要
Adjustable Speed Drive (ASD) system is essential in a variety of electric vehicles. It is different from the traditional gasoline engine vehicles. ASD system is an extra interference of the electric vehicles and the degree of disturbance is also greater than other electronic components. Therefore, it is an important issue to find out how ASD system conducts the intensity of EMI in 150k-30MHz through data simulation at design stage. In this research, ansoft simplrer system-level circuit software is used for simulating the intensity of EMI by conducting of NTU Green Jumper’s ASD system, which also includes IGBT device dynamic model, IPM motor high frequency model, snubber circuit, power line and bus parastic parameter with coupling. Based on the simulation result, ASD system can successfully conduct EMI in 150k-30MHz and the error could be less than 10dB, which confirmed that EMI modeling method can be accurately used at the design stage, and also be the reference for a filter designing. In experimental operation, I made the test in S1 wave isolation room at Automotive Research & Testing Center and obtained frequency domain data after checking background’s interference can meet test requirements.