變頻器以其結構簡單、造價低廉、便于維修等優勢越來越多地被應用于調速系統。其
中， V/F 曲線參數設定是保證變頻調速系統靜態速度精度的關鍵。本文通過對交流電動機V/F 函數的理論分析，采用數學方法對變頻器V/F 曲線各參數進行計算，利用臺達 VFD--A型變頻器的兩段V/F 曲線來模擬交流電動機不同供電頻率段的電壓/頻率特性。進而通過應用實例闡述利用變頻器V/F 曲線各參數的設定提高變頻調速系統速度的精度。
關鍵詞：變頻器，V/F 函數，變頻調速系統，最小二乘法，靜態速度精度
Abstract: The frequency converter is applied to speed system more and more, because its structure is simple, and it costs lower and is easy to maintain, etc. The set of parameter of V/F function is the key to assure the static precision of speed for the frequency converter. Based on the academicanalysis of V/F function of the A.C motor ,the article calculates the parameter of V/F function of the frequency converter using the method of maths. The V/F characteristic of the A.C. motor for different power frequency is simulated by means of two-part V/F curve of the DELTA VFD-A. The example is used to expound the improvement of precision of the frequency converter speed system, by setting the parameter of V/F function of the frequency converter.
Key Words: Frequency Converter. V/F Function Frequency Converter Speed System Least
Square Method Static Precision of Speed