本文選題：鐵氧體伺服電機(jī) + 參數(shù)特性��； 參考：《湖北工業(yè)大學(xué)》2017年碩士論文

【摘要】：為了解決伺服電機(jī)性能和成本之間的矛盾,一種新型的鐵氧體永磁輔助式磁阻同步伺服電機(jī)(以下簡(jiǎn)稱(chēng)鐵氧體伺服電機(jī)),其作為一種新型的永磁電機(jī),同時(shí)具有內(nèi)置式永磁同步電機(jī)和同步磁阻電機(jī)的特性,且制造成本更低,性價(jià)比高,高溫性能穩(wěn)定,不存在過(guò)壓風(fēng)險(xiǎn),恒功率范圍寬、可寬范圍調(diào)速等優(yōu)點(diǎn),在伺服驅(qū)動(dòng)系統(tǒng)中有著良好的應(yīng)用前景。本文以鐵氧體伺服電機(jī)驅(qū)動(dòng)控制系統(tǒng)為研究對(duì)象,在研究鐵氧體伺服電機(jī)特有的控制特點(diǎn)的基礎(chǔ)上,對(duì)鐵氧體伺服電機(jī)的起動(dòng)策略和恒轉(zhuǎn)矩區(qū)MTPA控制策略、效率優(yōu)化策略進(jìn)行研究。本文首先對(duì)鐵氧體伺服驅(qū)動(dòng)系統(tǒng)的電機(jī)本體進(jìn)行電磁設(shè)計(jì),對(duì)電機(jī)的轉(zhuǎn)子結(jié)構(gòu)優(yōu)化選擇,不同極槽配合的研究,仿真確定鐵氧體伺服電機(jī)最優(yōu)電磁方案。利用場(chǎng)路結(jié)合法計(jì)算鐵氧體電機(jī)的參數(shù),并詳細(xì)對(duì)比研究鐵氧體伺服電機(jī)特有的轉(zhuǎn)矩特性。針對(duì)鐵氧體伺服電機(jī)特有的特點(diǎn),進(jìn)行控制分析,并建立驅(qū)動(dòng)系統(tǒng)場(chǎng)路聯(lián)合仿真平臺(tái)。然后針對(duì)鐵氧體伺服電機(jī)特有的特性導(dǎo)致其起動(dòng)和初始位置定位困難,提出改進(jìn)的磁定位起動(dòng)策略,同時(shí)引入了零度位置辨識(shí)與補(bǔ)償算法,實(shí)現(xiàn)電機(jī)平滑穩(wěn)定起動(dòng)。為了獲取更加準(zhǔn)確的初始位置信息,提出了雙參考坐標(biāo)系初始位置估計(jì)策略,采用雙坐標(biāo)理論,完成對(duì)初始位置的象限判斷、割線法求估計(jì)誤差角,實(shí)現(xiàn)對(duì)鐵氧體伺服電機(jī)的初始位置精確估計(jì)。其次針對(duì)鐵氧體電機(jī)參數(shù)變化復(fù)雜的問(wèn)題,提出了不依賴(lài)于電機(jī)參數(shù)的在線變步長(zhǎng)搜索最小直軸電流補(bǔ)償算法,可根據(jù)定子電流幅值變化改變搜索步長(zhǎng)和方向,從而更快的逼近最小直軸電流補(bǔ)償點(diǎn),有效的解決搜索緩慢和震蕩問(wèn)題,恒定轉(zhuǎn)矩的情況下電流最小、系統(tǒng)效率最高。最后設(shè)計(jì)制作了鐵氧體伺服電機(jī)樣機(jī),設(shè)計(jì)了鐵氧體伺服電機(jī)驅(qū)動(dòng)系統(tǒng)電機(jī)驅(qū)動(dòng)驅(qū)動(dòng)硬件方案,針對(duì)提出的起動(dòng)策略、MTPA控制與效率優(yōu)化策略編寫(xiě)相應(yīng)的驅(qū)動(dòng)系統(tǒng)軟件,構(gòu)建驅(qū)動(dòng)系統(tǒng)實(shí)驗(yàn)平臺(tái),在此平臺(tái)上進(jìn)行全面的實(shí)驗(yàn)研究,驗(yàn)證電機(jī)本體的設(shè)計(jì)性能和控制策略的有效性。實(shí)驗(yàn)結(jié)果表明:設(shè)計(jì)的鐵氧體樣機(jī)的電感參數(shù)特性、反電動(dòng)勢(shì)與仿真設(shè)計(jì)結(jié)果吻合。起動(dòng)策略能有效平穩(wěn)起動(dòng)電機(jī),初始位置精確估計(jì)策略可快速的收斂至估計(jì)值,估計(jì)誤差小,準(zhǔn)確的估計(jì)初始位置。采用本文研究的在線變步長(zhǎng)最小直軸電流搜索補(bǔ)償策略可以同時(shí)實(shí)現(xiàn)鐵氧體伺服電機(jī)MTPA控制和效率優(yōu)化,提高鐵氧體電機(jī)穩(wěn)態(tài)運(yùn)行效率及可靠性,從而提高鐵氧體伺服電機(jī)驅(qū)動(dòng)系統(tǒng)整體控制性能。
[Abstract]:In order to solve the contradiction between performance and cost of servo motor, a new type of ferrite permanent magnet assisted magnetoresistive synchronous servo motor (hereinafter referred to as ferrite servo motor) is proposed as a new type of permanent magnet motor. At the same time, it has the characteristics of built-in permanent magnet synchronous motor and synchronous reluctance motor, and has the advantages of lower manufacturing cost, higher cost performance, stable performance at high temperature, no overvoltage risk, wide constant power range and wide range of speed regulation. It has good application prospect in servo drive system. This paper takes the ferrite servo motor drive control system as the research object. On the basis of studying the special control characteristics of the ferrite servo motor, the starting strategy and the constant torque MTPA control strategy of the ferrite servo motor are studied. Efficiency optimization strategy is studied. In this paper, the electromagnetic design of the motor body of the ferrite servo drive system is first carried out. The optimal electromagnetic scheme of the ferrite servo motor is determined by simulation and the optimal selection of the rotor structure and the coordination of different pole slots. The parameters of ferrite motor are calculated by field circuit combination method, and the specific torque characteristics of ferrite servo motor are compared and studied in detail. According to the characteristic of ferrite servo motor, the control analysis is carried out, and the field circuit simulation platform of drive system is established. Then aiming at the difficulty of starting and initial position positioning due to the unique characteristics of ferrite servo motor, an improved magnetic position starting strategy is proposed. At the same time, zero position identification and compensation algorithm is introduced to realize the smooth and stable starting of the motor. In order to obtain more accurate initial position information, a dual reference coordinate system initial position estimation strategy is proposed. The quadrant judgment of the initial position is completed by using the double coordinate theory, and the estimation error angle is obtained by the Secant method. The accurate estimation of the initial position of the ferrite servo motor is realized. Secondly, aiming at the complex change of ferrite motor parameters, an on-line variable step search minimum straight axis current compensation algorithm is proposed, which can change the search step size and direction according to the change of stator current amplitude. Thus the minimum straight axis current compensation point can be approached more quickly, and the search slow and oscillating problems can be solved effectively. The system efficiency is the highest and the current is the minimum under constant torque. Finally, a ferrite servo motor prototype is designed, and the drive hardware scheme of the ferrite servo motor driving system is designed. The corresponding driving system software is compiled for the MTPA control and efficiency optimization strategy proposed. The experimental platform of driving system is constructed, and a comprehensive experimental study is carried out on this platform to verify the design performance of motor ontology and the effectiveness of control strategy. The experimental results show that the inductance parameters and the back EMF of the ferrite prototype are in good agreement with the simulation results. The starting strategy can effectively and smoothly start the motor, and the precise estimation strategy of the initial position can quickly converge to the estimated value, and the estimation error is small, and the initial position can be estimated accurately. The on-line variable step minimum straight axis current search and compensation strategy studied in this paper can simultaneously realize the MTPA control and efficiency optimization of ferrite servo motor, and improve the steady-state operation efficiency and reliability of ferrite motor. In order to improve the overall control performance of ferrite servo motor drive system.
【學(xué)位授予單位】：湖北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM383.4;TP273

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本文編號(hào)：1880315