發(fā)布時(shí)間：2018-04-05 07:10

  本文選題：開(kāi)關(guān)磁阻電機(jī)　切入點(diǎn)：轉(zhuǎn)矩分配　出處：《中南大學(xué)》2014年碩士論文

【摘要】：開(kāi)關(guān)磁阻電機(jī)(Switched Reluctance Motor)調(diào)速系統(tǒng)是變頻調(diào)速系統(tǒng)之后迅速崛起的一種新型調(diào)速系統(tǒng),開(kāi)關(guān)磁阻電機(jī)最早可追溯到19世紀(jì)40年代,即所謂“電磁制動(dòng)機(jī)”,開(kāi)關(guān)磁阻電機(jī)調(diào)速系統(tǒng)因其結(jié)構(gòu)簡(jiǎn)單、堅(jiān)固、成本低廉、起動(dòng)轉(zhuǎn)矩大、起動(dòng)電流小、在整個(gè)調(diào)速范圍內(nèi)具有較高的效率,且兼有直流電機(jī)和異步電機(jī)的優(yōu)點(diǎn),近年來(lái)得到迅速發(fā)展。但因?yàn)殡姍C(jī)的雙凸極結(jié)構(gòu)和步進(jìn)式旋轉(zhuǎn)方式,導(dǎo)致電機(jī)的轉(zhuǎn)矩脈動(dòng)和噪音相對(duì)較大,影響了SRM在更多場(chǎng)合的推廣和應(yīng)用。 本文針對(duì)開(kāi)關(guān)磁阻電機(jī)轉(zhuǎn)矩脈動(dòng)和噪音大的缺點(diǎn),分析了轉(zhuǎn)矩脈動(dòng)和噪音產(chǎn)生的原因,研究了SRM的工作原理以及轉(zhuǎn)矩脈動(dòng)抑制常用的控制方法,在simulink環(huán)境下建立了SRM仿真模型,論述了開(kāi)通角和關(guān)斷角對(duì)轉(zhuǎn)矩脈動(dòng)的影響,得出了開(kāi)通角、關(guān)斷角的優(yōu)化控制可以抑制轉(zhuǎn)矩脈動(dòng)的結(jié)論,采用基于余弦型轉(zhuǎn)矩分配函數(shù)結(jié)合模糊開(kāi)通角優(yōu)化在轉(zhuǎn)速電流雙閉環(huán)的控制方式下對(duì)轉(zhuǎn)矩脈動(dòng)進(jìn)行抑制,建立了仿真模型,驗(yàn)證了該控制方案的可行性,得到了比較好的轉(zhuǎn)矩脈動(dòng)抑制效果。 在上述研究基礎(chǔ)上,本文以55KW的三相12/8極SRM為研究對(duì)象,設(shè)計(jì)了以DSP TMS320F2812為核心控制部件、三相不對(duì)稱(chēng)式半橋功率主電路、IGBT驅(qū)動(dòng)器、數(shù)據(jù)采集與變換環(huán)節(jié)、光電式位置檢測(cè)裝置及保護(hù)環(huán)節(jié)轉(zhuǎn)速電流雙閉環(huán)的開(kāi)關(guān)磁阻電機(jī)調(diào)速系統(tǒng)。在CCS5.2的平臺(tái)上,編寫(xiě)了系統(tǒng)控制軟件。最后進(jìn)行了系統(tǒng)調(diào)試,實(shí)驗(yàn)結(jié)果表明,本文采用的控制方法,響應(yīng)速度快,動(dòng)態(tài)性能好,對(duì)開(kāi)關(guān)磁阻電機(jī)的轉(zhuǎn)矩脈動(dòng)和噪音具有比較明顯的抑制效果。圖55幅,
[Abstract]:Switched Reluctance Motor (SRM) speed control system is a new type of speed control system, which rises rapidly after the frequency conversion system. The switched reluctance motor (SRM) can be traced back to the 1840s, that is, the so-called "electromagnetic brake".The switched reluctance motor (SRM) speed control system has the advantages of simple structure, strong structure, low cost, large starting torque, low starting current, high efficiency in the whole speed range, and the advantages of both DC motor and asynchronous motor.It has developed rapidly in recent years.However, because of the double salient pole structure and the stepwise rotation mode, the torque ripple and noise of the motor are relatively large, which affects the popularization and application of SRM in more occasions.In this paper, the reason of torque ripple and noise is analyzed, the working principle of SRM and the control method of torque ripple suppression are studied, and the simulation model of SRM is established in simulink environment.The influence of turn-on angle and turn-off angle on torque ripple is discussed. The conclusion is drawn that the optimal control of turn-on angle and turn-off angle can restrain torque ripple.Based on the cosine torque distribution function and fuzzy turn-on angle optimization, the torque ripple is suppressed under the dual closed-loop control mode of rotational speed and current, and the simulation model is established to verify the feasibility of the control scheme.Better torque ripple suppression effect is obtained.On the basis of the above research, taking the three-phase 12 / 8 pole SRM of 55KW as the research object, this paper designs a three-phase asymmetric half-bridge power main circuit with DSP TMS320F2812 as the core control unit, and the data acquisition and conversion link.Photoelectric position detecting device and speed control system of switched reluctance motor with double closed loop speed and current of protection link.On the platform of CCS5.2, the system control software is written.Finally, the system is debugged. The experimental results show that the control method adopted in this paper has the advantages of fast response speed and good dynamic performance, and has obvious restraining effect on torque ripple and noise of switched reluctance motor.Figure 55,
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM352

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本文編號(hào)：1713708