變頻器以其結(jié)構(gòu)簡(jiǎn)單、造價(jià)低廉、便于維修等優(yōu)勢(shì)越來(lái)越多地被應(yīng)用于調(diào)速系統(tǒng)。其
中， V/F 曲線(xiàn)參數(shù)設(shè)定是保證變頻調(diào)速系統(tǒng)靜態(tài)速度精度的關(guān)鍵。本文通過(guò)對(duì)交流電動(dòng)機(jī)V/F 函數(shù)的理論分析，采用數(shù)學(xué)方法對(duì)變頻器V/F 曲線(xiàn)各參數(shù)進(jìn)行計(jì)算，利用臺(tái)達(dá) VFD--A型變頻器的兩段V/F 曲線(xiàn)來(lái)模擬交流電動(dòng)機(jī)不同供電頻率段的電壓/頻率特性。進(jìn)而通過(guò)應(yīng)用實(shí)例闡述利用變頻器V/F 曲線(xiàn)各參數(shù)的設(shè)定提高變頻調(diào)速系統(tǒng)速度的精度。
關(guān)鍵詞：變頻器，V/F 函數(shù)，變頻調(diào)速系統(tǒng)，最小二乘法，靜態(tài)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