本文選題：永磁同步電機(jī) + 轉(zhuǎn)矩脈動　； 參考：《大連海事大學(xué)》2017年碩士論文

【摘要】：永磁同步電機(jī)直接轉(zhuǎn)矩控制方法具有控制簡單、響應(yīng)迅速等優(yōu)點,在工業(yè)領(lǐng)域中得到了廣泛的應(yīng)用,已成為一種高性能的交流調(diào)速方法。而永磁同步電機(jī)直接轉(zhuǎn)矩控制也存在轉(zhuǎn)矩和磁鏈脈動大的缺陷。針對永磁同步電機(jī)直接轉(zhuǎn)矩控制中存在磁鏈和轉(zhuǎn)矩脈動大的問題,本文在控制方法上提出了相應(yīng)的改進(jìn)策略。本文首先分析了永磁同步電機(jī)的數(shù)學(xué)模型和直接轉(zhuǎn)矩控制的實現(xiàn)方法,搭建了傳統(tǒng)直接轉(zhuǎn)矩控制的仿真模型。之后,建立了直接轉(zhuǎn)矩控制實驗平臺,完成了控制算法的編程和調(diào)試,實現(xiàn)了永磁同步電機(jī)的直接轉(zhuǎn)矩控制。針對轉(zhuǎn)矩和磁鏈脈動大的問題,先對零電壓矢量對轉(zhuǎn)矩調(diào)節(jié)的影響進(jìn)行研究,提出了一種主動零電壓矢量插入的控制策略,充分發(fā)揮零矢量對轉(zhuǎn)矩"獨特"的調(diào)節(jié)作用,在此基礎(chǔ)上,引進(jìn)單神經(jīng)元PID與傳統(tǒng)PID結(jié)合的控制策略。通過仿真驗證了該控制策略對于抑制轉(zhuǎn)矩脈動有效果,而該控制策略對于大功率、大轉(zhuǎn)動慣量系統(tǒng)轉(zhuǎn)矩脈動抑制效果更明顯。對于定子電阻變化導(dǎo)致轉(zhuǎn)矩和磁鏈發(fā)生變化從而產(chǎn)生脈動,對此本文對扇區(qū)進(jìn)行細(xì)分,采用十八扇區(qū),并將轉(zhuǎn)矩和磁鏈誤差經(jīng)過兩個PID輸出定子電阻變化值對定子電阻進(jìn)行補償。仿真結(jié)果表明該控制策略對于小負(fù)載、轉(zhuǎn)動慣量較小的系統(tǒng)抑制轉(zhuǎn)矩和磁鏈脈動效果更顯著。
[Abstract]:The direct torque control method of permanent magnet synchronous motor (PMSM) has many advantages such as simple control and quick response. It has been widely used in industrial field and has become a high performance AC speed regulation method.The direct torque control of permanent magnet synchronous motor (PMSM) also has the defects of high torque and flux ripple.Aiming at the problem of large flux linkage and torque ripple in the direct torque control of PMSM, this paper puts forward the corresponding improvement strategy in the control method.In this paper, the mathematical model of permanent magnet synchronous motor and the realization method of direct torque control are analyzed, and the simulation model of traditional direct torque control is built.After that, the direct torque control experiment platform is established, the control algorithm is programmed and debugged, and the direct torque control of permanent magnet synchronous motor is realized.In order to solve the problem of large torque and flux ripple, the effect of zero voltage vector on torque regulation is studied, and a control strategy of active zero voltage vector insertion is proposed to give full play to the "unique" effect of zero voltage vector on torque regulation.On this basis, a control strategy combining single neuron PID with traditional PID is introduced.The simulation results show that the proposed control strategy is effective for restraining torque ripple, and the control strategy is more effective for high power and large moment of inertia system.For the stator resistance change causes the torque and the flux chain to produce the ripple, this article carries on the subdivision to the sector, uses 18 sectors,The torque and flux error are compensated by two PID output stator resistances.The simulation results show that the proposed control strategy is more effective in reducing torque and flux ripple for the system with small load and small moment of inertia.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM341

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