本文選題：無軸承永磁同步電機(BPMSM)　切入點：滑模觀測器(SMO)　出處：《江蘇大學(xué)》2017年碩士論文

【摘要】：無軸承永磁同步電機(BPMSM)是將電磁軸承技術(shù)與永磁同步電機(PMSM)相結(jié)合的一種新型電機。該類型電機集旋轉(zhuǎn)與自懸浮功能于一體,具有體積小、重量輕、功率密度大、無需潤滑、無磨損、無機械噪聲等特點,在半導(dǎo)體、生命科學(xué)、生物化工、航空航天等高科技領(lǐng)域具有廣泛的應(yīng)用前景。對無軸承電機穩(wěn)定懸浮運行以及轉(zhuǎn)子磁場定向控制而言,轉(zhuǎn)子位置信號的精確檢測是十分重要的。然而傳統(tǒng)的機械式位置/速度傳感器不僅增加了電機的體積和成本,而且降低了系統(tǒng)的可靠性,尤其是在高速、超高速條件下會嚴重限制無軸承電機優(yōu)良高速性能的發(fā)揮。因此,本文在建立BPMSM數(shù)學(xué)模型基礎(chǔ)上,對基于滑模觀測器的BPMSM無位置傳感器的狀態(tài)估計方法展開研究,并完成了BPMSM數(shù)字控制系統(tǒng)的軟、硬件設(shè)計實現(xiàn)。具體內(nèi)容包括:(1)分析了BPMSM懸浮力產(chǎn)生原理以及轉(zhuǎn)矩繞組與懸浮力繞組同氣隙磁場之間的電磁耦合關(guān)系。利用麥克斯韋張量法構(gòu)建了計及轉(zhuǎn)子偏心的BPMSM懸浮力精確模型,根據(jù)機電能量轉(zhuǎn)換原理推導(dǎo)出了考慮轉(zhuǎn)子偏心與懸浮繞組電流的電磁轉(zhuǎn)矩數(shù)學(xué)模型。(2)在傳統(tǒng)滑模觀測器的基礎(chǔ)上,針對其抖振較大的問題,提出一種基于改進型滑模觀測器的BPMSM轉(zhuǎn)子位置估計方法。通過滑模觀測器得到電機反電動勢的估計值,利用PI-I結(jié)構(gòu)的鎖相環(huán)類型位置觀測器從估計的反電動勢中提取出轉(zhuǎn)子位置和速度信息。采用轉(zhuǎn)子磁場定向控制策略并考慮轉(zhuǎn)子偏心,利用matlab/simulink建立了BPMSM無傳感器控制系統(tǒng)仿真模型。仿真試驗研究結(jié)果表明,所提出的改進方法能夠在中高速條件下減小抖振并有效提高對轉(zhuǎn)子位置的估計精度。(3)構(gòu)建了基于DSP TMS320F28335的BPMSM數(shù)字控制實驗平臺,給出了完整的軟、硬件實施方案。BPMSM數(shù)字控制系統(tǒng)的硬件設(shè)計方面主要包括:輔助電源電路、檢測電路、接口電路。軟件設(shè)計方面主要包括:轉(zhuǎn)子位置和速度計算、徑向位移閉環(huán)控制算法、速度和電流閉環(huán)控制算法、SVPWM調(diào)制算法。對BPMSM數(shù)字控制系統(tǒng)的軟、硬件進行了調(diào)試,通過實驗結(jié)果分析,證明了所提出設(shè)計方案的正確性。
[Abstract]:The bearingless permanent magnet synchronous motor (BPMSM) is a new type of motor which combines electromagnetic bearing technology with PMSM. This type of motor has the functions of rotation and self-suspension. It has the advantages of small volume, light weight, high power density and no lubrication. With no wear and no mechanical noise, it has a wide application prospect in the fields of semiconductor, life science, biochemistry, aerospace, etc., for the stable suspension operation of bearingless motor and the rotor magnetic field oriented control, The accurate detection of rotor position signal is very important. However, the traditional mechanical position / speed sensor not only increases the size and cost of the motor, but also reduces the reliability of the system, especially at high speed. The excellent high speed performance of bearingless motor will be seriously restricted under the condition of super high speed. Therefore, on the basis of establishing BPMSM mathematical model, the state estimation method of BPMSM sensorless position sensor based on sliding mode observer is studied in this paper. The software of BPMSM digital control system is completed. The hardware design is realized. The concrete contents include: 1) analyze the principle of BPMSM levitation force generation and the electromagnetic coupling relationship between torque winding and suspension force winding and air gap magnetic field. By using Maxwell Zhang Liang method, the rotor eccentricity is constructed. Precise BPMSM suspension force model, According to the principle of electromechanical energy conversion, a mathematical model of electromagnetic torque considering rotor eccentricity and suspension winding current is derived. Based on the traditional sliding mode observer, the problem of large buffeting is discussed. An improved sliding mode observer based BPMSM rotor position estimation method is proposed. The estimated value of the motor backEMF is obtained by the sliding mode observer. The rotor position and velocity information is extracted from the estimated backEMF by using the PI-I phase-locked loop type position observer. The rotor field oriented control strategy is adopted and the rotor eccentricity is considered. The simulation model of BPMSM sensorless control system is established by using matlab/simulink. The simulation results show that, The proposed improved method can reduce buffeting and improve the precision of rotor position estimation effectively under the condition of medium and high speed. The experimental platform of BPMSM digital control based on DSP TMS320F28335 is constructed, and the complete software is given. The hardware design of BPMSM digital control system mainly includes: auxiliary power circuit, detection circuit, interface circuit. Software design mainly includes: rotor position and velocity calculation, radial displacement closed-loop control algorithm, The software and hardware of BPMSM digital control system are debugged. The experimental results show that the proposed scheme is correct.
【學(xué)位授予單位】：江蘇大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM341

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本文編號：1671556