發(fā)布時(shí)間：2018-02-07 11:46

  本文關(guān)鍵詞： 單相永磁無刷直流電機(jī) 前饋補(bǔ)償 矢量控制 單相SVPWM調(diào)制 穩(wěn)定性分析　出處：《浙江大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：單相永磁無刷直流電機(jī)(簡稱Single-phase PMBLDCM)憑借著其結(jié)構(gòu)簡單、低成本等顯著優(yōu)點(diǎn),已經(jīng)在很多領(lǐng)域得到了非常廣泛應(yīng)用。但是,人們對其良好的性能也提出了越來越高的要求。這不僅僅體現(xiàn)在電機(jī)本體結(jié)構(gòu)需要進(jìn)一步優(yōu)化,對單相永磁無刷直流電機(jī)的低轉(zhuǎn)矩脈動(dòng)、高效率運(yùn)行方面的研究也是未來的發(fā)展趨勢。為了解決單相永磁無刷直流電機(jī)的"起動(dòng)死點(diǎn)"問題,常將電機(jī)設(shè)計(jì)成不均勻氣隙結(jié)構(gòu),但是較大的齒槽轉(zhuǎn)矩對電機(jī)的輸出轉(zhuǎn)矩波動(dòng)產(chǎn)生很大影響。為了使單相永磁無刷直流電機(jī)的輸出轉(zhuǎn)矩得到改善,本文在查閱國內(nèi)外大量相關(guān)書籍文獻(xiàn)的基礎(chǔ)上,分別采用能量法和麥克斯韋應(yīng)力張量法對單相無刷直流電機(jī)的齒槽轉(zhuǎn)矩進(jìn)行了分析,進(jìn)而提出了基于前饋?zhàn)赃m應(yīng)的轉(zhuǎn)矩補(bǔ)償控制方法,通過對交軸電流分量進(jìn)行前饋補(bǔ)償,所產(chǎn)生的電磁轉(zhuǎn)矩與齒槽轉(zhuǎn)矩相互補(bǔ)償,以降低電機(jī)輸出轉(zhuǎn)矩脈動(dòng)。為了實(shí)現(xiàn)單相永磁無刷直流電機(jī)的高效率控制,本文對其高效率控制的關(guān)鍵點(diǎn)進(jìn)行了分析,并且參考三相永磁無刷直流電機(jī)中廣泛應(yīng)用的空間矢量控制技術(shù),提出了一種適用于單相永磁無刷直流電機(jī)的矢量控制技術(shù),該方法通過構(gòu)造與真實(shí)相電流正交的虛擬相電流,構(gòu)成兩相正交靜止坐標(biāo)系統(tǒng),經(jīng)Park旋轉(zhuǎn)坐標(biāo)變換以及雙電流閉環(huán)調(diào)節(jié),再使用單相SVPWM調(diào)制技術(shù)輸出,實(shí)現(xiàn)對單相永磁無刷直流電機(jī)的矢量控制。此外,還提出了一種基于內(nèi)功率因數(shù)角閉環(huán)調(diào)節(jié)的簡單正弦波電流控制方法。最后,通過搭建實(shí)驗(yàn)平臺(tái)進(jìn)行具體實(shí)驗(yàn)驗(yàn)證分析,單相永磁無刷直流電機(jī)的矢量控制方法和改進(jìn)的簡單的正弦波電流控制方法均能實(shí)現(xiàn)了其在寬負(fù)載范圍的高效率運(yùn)行,且電流波形正弦度良好,電機(jī)在振動(dòng)噪聲方面也得到了明顯改善。但是,從電機(jī)但總體控制性能來看,矢量控制的方法比改進(jìn)的簡單正弦波控制還更勝一籌。
[Abstract]:Single phase permanent magnet brushless DC motor (Single-phase PMBLDCM) has been widely used in many fields because of its simple structure and low cost. It is not only that the structure of the motor needs to be further optimized, but also the low torque ripple of the single-phase permanent magnet brushless DC motor. In order to solve the problem of "starting dead point" of single-phase permanent magnet brushless DC motor, the motor is often designed as a non-uniform air-gap structure, in order to solve the problem of "starting dead point" of single-phase permanent magnet brushless DC motor. In order to improve the output torque of single-phase permanent magnet brushless DC motor, based on a large number of domestic and foreign literature, The tooth groove torque of single-phase brushless DC motor is analyzed by energy method and Maxwell stress Zhang Liang method, and a feedforward adaptive torque compensation control method is proposed. In order to reduce the output torque ripple of the motor, the key points of the high efficiency control of single-phase permanent magnet brushless DC motor are analyzed in this paper, in order to achieve the high efficiency control of the single-phase permanent magnet brushless DC motor. Referring to the space vector control technology widely used in the three-phase permanent magnet brushless DC motor, a vector control technique for single-phase permanent magnet brushless DC motor is proposed. The virtual phase current, which is orthogonal to the real phase current, is constructed. A two-phase quadrature static coordinate system is constructed. The vector control of single-phase permanent magnet brushless DC motor is realized by means of Park rotation coordinate transformation and double current closed-loop regulation, and then the single-phase SVPWM modulation technique is used to output the system. A simple sinusoidal current control method based on closed loop regulation of internal power factor angle is also proposed. The vector control method of single-phase permanent magnet brushless DC motor and the improved sinusoidal current control method can achieve high efficiency in wide load range, and the sinusoidal degree of current waveform is good. But the vector control method is better than the improved simple sinusoidal control method.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM33;TP273

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本文編號：1494303