本文選題：雙三相感應(yīng)電機　切入點：空間矢量脈寬調(diào)制　出處：《中國礦業(yè)大學(xué)》2017年碩士論文

【摘要】：隨著科學(xué)技術(shù)的發(fā)展,傳統(tǒng)的三相電機調(diào)速系統(tǒng)在船舶推進、航空航天等低壓大功率應(yīng)用場合往往不能夠滿足控制需求,使得多相電機調(diào)速控制逐漸成為研究熱點。與傳統(tǒng)的三相交流電機相比,多相感應(yīng)電機具有轉(zhuǎn)矩脈動小、可靠性高、能夠?qū)崿F(xiàn)低壓大功率運行等優(yōu)點。為了實現(xiàn)高性能的控制需求,常采用矢量控制和直接轉(zhuǎn)矩控制的閉環(huán)控制策略進行交流調(diào)速控制。與直接轉(zhuǎn)矩控制相比,矢量控制所得電機電流紋波更少,且其轉(zhuǎn)矩脈動也相對較低。傳統(tǒng)的速度傳感器常會受到環(huán)境及電機參數(shù)的影響,轉(zhuǎn)速檢測不精確,通過轉(zhuǎn)速估計模塊替代速度傳感器的無速度傳感器技術(shù),能夠解決這類問題。本文以雙三相感應(yīng)電機為研究對象,對其繞組結(jié)構(gòu)、時空諧波特性以及磁動勢情況進行了研究分析。根據(jù)空間矢量解耦變換理論,建立了雙三相感應(yīng)電機數(shù)學(xué)模型,通過仿真實驗研究驗證了其正確性。為了有效抑制空間諧波電流,根據(jù)空間矢量解耦變換原理,采用合適的中間電壓矢量進行合成,實現(xiàn)一種新的空間矢量解耦空間矢量脈寬調(diào)制(SVPWM)算法,并通過開環(huán)仿真模型,對該算法進行了驗證。根據(jù)轉(zhuǎn)子磁鏈定向原理,研究了傳統(tǒng)的雙三相感應(yīng)電機矢量控制策略,然后通過采用內(nèi)�？刂破魈娲娏鳝h(huán)PI調(diào)節(jié)器,研究了基于電流環(huán)內(nèi)模控制的雙三相感應(yīng)電機矢量控制系統(tǒng)。通過對兩種控制方案的仿真對比,驗證了內(nèi)模矢量控制方案的正確性和優(yōu)越性。采用無速度傳感器模塊代替?zhèn)鹘y(tǒng)的軸編碼器對電機轉(zhuǎn)速進行估計跟蹤,以模型參考自適應(yīng)(MRAS)原理為基礎(chǔ),采用一種變參數(shù)型MRAS轉(zhuǎn)速辨識算法對雙三相電機調(diào)速系統(tǒng)的無速度傳感器模塊進行了優(yōu)化設(shè)計,使其能夠在電機低速和高速運轉(zhuǎn)時都能表現(xiàn)出良好的跟蹤特性。通過雙三相感應(yīng)電機實驗平臺分別對開環(huán)SVPWM算法、閉環(huán)矢量控制策略以及無速度傳感器控制方案進行了實驗研究,結(jié)果表明文中所述理研究的理論及方法的有效性與可行性。
[Abstract]:With the development of science and technology, the traditional three-phase motor speed regulation system in the marine propulsion, aerospace and other low-voltage high-power applications often can not meet the control needs. Compared with the traditional three-phase AC motor, the multi-phase induction motor has less torque ripple and higher reliability. In order to realize the demand of high performance control, the closed loop control strategy of vector control and direct torque control is often used for AC speed regulation control. The current ripple of vector control motor is less and its torque ripple is relatively low. The traditional speed sensor is often affected by the environment and motor parameters, and the speed measurement is not accurate. This problem can be solved by replacing speed sensorless technology with speed estimation module. In this paper, the windings of two-phase induction motor are studied. Based on the theory of space vector decoupling transformation, the mathematical model of double three phase induction motor is established. In order to suppress the space harmonic current effectively, according to the principle of space vector decoupling transformation, the suitable intermediate voltage vector is synthesized. A new space vector decoupling space vector pulse width modulation (SVPWM) algorithm is implemented. The algorithm is verified by an open-loop simulation model. Based on the rotor flux orientation principle, the traditional vector control strategy of two-phase induction motor is studied. Then the vector control system of two-phase induction motor based on current loop internal mode control is studied by replacing the current loop Pi regulator with the internal model controller. The correctness and superiority of the internal model vector control scheme are verified. Speed sensorless module is used instead of the traditional shaft encoder to estimate and track the motor speed, which is based on the principle of model reference adaptive control (MRASS). In this paper, a variable parameter MRAS speed identification algorithm is used to optimize the speed sensorless module of dual three-phase motor speed control system. It can show good tracking characteristics at low speed and high speed. The open-loop SVPWM algorithm is applied to the two-three-phase induction motor experiment platform. The closed loop vector control strategy and the speed sensorless control scheme are studied experimentally. The results show that the theory and method discussed in this paper are effective and feasible.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM346;TP273

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