【摘要】：當(dāng)前,高鐵與軌道交通正處于飛速發(fā)展期,對(duì)牽引變流器的控制性能提出了越來(lái)越高的要求。矢量控制技術(shù)以其控制簡(jiǎn)易、動(dòng)靜態(tài)性能優(yōu)越等優(yōu)勢(shì)在機(jī)車牽引領(lǐng)域有廣泛的應(yīng)用,但是磁場(chǎng)定向容易受電機(jī)參數(shù)變化,尤其是轉(zhuǎn)子電阻變化的影響。本文在校企聯(lián)合牽引變流器項(xiàng)目的基礎(chǔ)上,對(duì)矢量控制算法中的轉(zhuǎn)子電阻校正策略進(jìn)行了研究。文章介紹了當(dāng)前常見(jiàn)的轉(zhuǎn)子磁鏈觀測(cè)器的類型,并分析了各自的優(yōu)缺點(diǎn)。分析了異步電機(jī)在A、B、C坐標(biāo)系與d、q坐標(biāo)系下的數(shù)學(xué)模型,以及在不同坐標(biāo)系之間的變換矩陣。文章分析了轉(zhuǎn)子磁鏈q軸分量與磁場(chǎng)定向準(zhǔn)確度的關(guān)系,然后基于這一點(diǎn),研究了電流矢量定向坐標(biāo)系下轉(zhuǎn)子磁鏈q軸分量觀測(cè)法和帶幅值相位校正的電壓模型轉(zhuǎn)子磁鏈q軸分量觀測(cè)法,并用觀測(cè)到的rq?來(lái)校正轉(zhuǎn)子電阻。詳細(xì)分析了兩種策略的觀測(cè)原理,并且通過(guò)仿真驗(yàn)證了校正的正確性。文章研究了一種新的基于轉(zhuǎn)子磁鏈q軸分量的轉(zhuǎn)子電阻校正策略,對(duì)策略進(jìn)行了詳細(xì)的理論分析,用仿真驗(yàn)證了算法的準(zhǔn)確性。分析了在樣機(jī)運(yùn)行時(shí)觀測(cè)延時(shí)對(duì)校正算法的影響,并且對(duì)延時(shí)進(jìn)行了補(bǔ)償。最后,在3k W樣機(jī)上,對(duì)校正策略進(jìn)行驗(yàn)證,記錄了相關(guān)波形,實(shí)驗(yàn)結(jié)果證明該校正策略是有效的。
[Abstract]:At present, high-speed rail and rail transit are in a period of rapid development, which puts forward higher and higher requirements for the control performance of traction converter. Vector control technology has been widely used in the field of locomotive traction because of its simple control and superior dynamic and static performance, but the magnetic field orientation is easily affected by the change of motor parameters, especially the change of rotor resistance. Based on the project of joint traction converter between school and enterprise, the rotor resistance correction strategy in vector control algorithm is studied in this paper. In this paper, the types of rotor flux observer are introduced, and their advantages and disadvantages are analyzed. The mathematical model of asynchronous motor in A, B, C coordinate system and d, Q coordinate system, as well as the transformation matrix between different coordinate systems are analyzed. In this paper, the relationship between the Q axis component of rotor flux chain and the accuracy of magnetic field orientation is analyzed. Based on this, the Q axis component observation method of rotor flux chain in current vector oriented coordinate system and the voltage model rotor flux Q axis component observation method with amplitude and phase correction are studied, and the observed rq? is used. To correct the rotor resistance. The observation principles of the two strategies are analyzed in detail, and the correctness of the correction is verified by simulation. In this paper, a new rotor resistance correction strategy based on Q-axis component of rotor flux is studied, the strategy is analyzed in detail, and the accuracy of the algorithm is verified by simulation. The influence of observation delay on correction algorithm while the prototype is running is analyzed, and the delay is compensated. Finally, the correction strategy is verified on the 3kW prototype, and the related waveforms are recorded. The experimental results show that the correction strategy is effective.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TM343

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