摘 要：矢量控制技術(shù)以其寬調(diào)速范圍和優(yōu)異的動(dòng)、靜態(tài)響應(yīng)性能等優(yōu)勢(shì)成為目前電力拖動(dòng)系統(tǒng)首選的高效能控制策略。本文采用基于模型的最小損耗控制方法，通過(guò)控制損耗函數(shù)中的某個(gè)變量，來(lái)減小電機(jī)的鐵損，使銅損與鐵損之間達(dá)到平衡狀態(tài)，實(shí)現(xiàn)異步電機(jī)在輕載穩(wěn)態(tài)時(shí)的效率最優(yōu)。仿真結(jié)果表明，此方法的控制速度快，穩(wěn)定性能好，且不需要增加任何硬件投資。 關(guān)鍵詞：異步電機(jī); 矢量控制; 效率優(yōu)化; 最小損耗控制 Abstract: The vector control technology, with the advantages of a wide velocity-adjusting range and dynamic and static response quality, has become the top choice for the high-efficiency control in the current electricity-powered system. The dynamic mathematic model founded on the synchronous rotating coordination was induced with the consideration of core loss, based on which, a minimum control method based on model was applied （that is, controlling a variable in the waste function） to reduce the core loss of motor and balance the core loss and copper loss, then, the optimal efficiency of the induction motor under the partial load and stable status was realized. Simulation results show that this method can achieve high control velocity and good stability without increasing costs. Key words: induction motor; vector control; efficiency optimization; loss minimization controller 1 引言 　　異步電機(jī)憑借自身的諸多優(yōu)點(diǎn)，已漸漸取代了直流機(jī)，被廣泛應(yīng)用于眾多領(lǐng)域[1]。在我國(guó)，異步電機(jī)的用電量占全國(guó)總用電量的60%，拖動(dòng)著90%以上的以電力為能源的運(yùn)動(dòng)機(jī)械。因此，研究異步電機(jī)的節(jié)能技術(shù)，提高其運(yùn)行效率，對(duì)節(jié)約能源和控制環(huán)境污染都具有重大的現(xiàn)實(shí)意義[2]。 　　矢量控制是一種先進(jìn)的、高性能的電機(jī)調(diào)速手段，為異步電機(jī)的節(jié)能損耗起到了積極作用。標(biāo)準(zhǔn)的矢量控制方法在恒轉(zhuǎn)矩調(diào)速范圍內(nèi)采取恒磁通控制策略，然而在輕載時(shí)，系統(tǒng)運(yùn)行在額定磁通必然會(huì)引起過(guò)度的鐵芯損耗，導(dǎo)致電機(jī)效率的降低，也就是說(shuō)性能卓越的矢量控制變頻驅(qū)動(dòng)系統(tǒng)在效率方面并不是最優(yōu)的[3,4]。 　　如果矢量控制結(jié)合效率最優(yōu)原則，則可有效擴(kuò)展異步電機(jī)的高效運(yùn)行范圍[5]。本文采用基于模型的最小損耗控制（LMC）對(duì)矢量控制異步電機(jī)在輕載穩(wěn)態(tài)時(shí)的效率優(yōu)化問(wèn)題進(jìn)行了深入研究。 詳情請(qǐng)點(diǎn)擊：基于模型的矢量控制異步電機(jī)效率優(yōu)化控制研究