發(fā)布時(shí)間：2018-07-16 15:19

【摘要】：在功率等級(jí)、調(diào)速性能和可靠性要求苛刻場(chǎng)合，傳統(tǒng)三相異步電機(jī)無(wú)法滿足實(shí)際需求。而多相永磁同步電機(jī)因其具有高功率密度、轉(zhuǎn)矩脈動(dòng)小、可靠性高等優(yōu)點(diǎn)，具有廣闊的發(fā)展空間。本文以雙三相永磁同步電機(jī)為研究對(duì)象，分析雙三相永磁同步電機(jī)的多維空間矢量調(diào)制技術(shù)、矢量控制和直接轉(zhuǎn)矩控制技術(shù)，然后研究了一種新的單逆變器驅(qū)動(dòng)多臺(tái)電機(jī)的電路拓?fù)浣Y(jié)構(gòu)。 首先，建立雙三相永磁同步電機(jī)的矢量空間解耦數(shù)學(xué)模型。傳統(tǒng)SVPWM技術(shù)只控制α-β平面的參考電壓矢量，忽視了x-y平面的參考電壓矢量，導(dǎo)致x-y平面產(chǎn)生較大的電流諧波，增加電機(jī)銅耗，影響電機(jī)控制性能。本文基于多維空間矢量調(diào)制的思想，研究了最大四矢量SVPWM技術(shù)和最大兩矢量與次大兩矢量SVPWM技術(shù)，可以同時(shí)嚴(yán)格控制α-β平面和x-y平面的參考電壓矢量。仿真結(jié)果表明，這兩種SVPWM控制算法不僅能夠提高直流母線電壓利用率，而且還能消除x-y平面的5、7次諧波，使輸出電壓呈純正弦變化。 然后，研究了雙三相永磁同步電機(jī)多電機(jī)串聯(lián)驅(qū)動(dòng)控制技術(shù)。將兩臺(tái)雙三相永磁同步電機(jī)定子繞組通過(guò)合理的相序轉(zhuǎn)換規(guī)則串聯(lián)在一起，用一臺(tái)六相電壓源型逆變器進(jìn)行驅(qū)動(dòng)控制。為了實(shí)現(xiàn)兩臺(tái)電機(jī)獨(dú)立運(yùn)行，本文采用一種具有雙調(diào)制器的SVPWM控制策略，在單逆變器供電下，輸出相電壓僅包含兩臺(tái)串聯(lián)電機(jī)各自所需的電壓基波分量，，實(shí)現(xiàn)兩臺(tái)串聯(lián)電機(jī)的解耦控制。仿真結(jié)果表明：改變串聯(lián)系統(tǒng)中任意一臺(tái)電機(jī)的轉(zhuǎn)速或負(fù)載，對(duì)另一臺(tái)電機(jī)的運(yùn)行并無(wú)影響，理論分析與仿真結(jié)果一致，驗(yàn)證了方案的正確性和可行性。
[Abstract]:The traditional three-phase asynchronous motor can not meet the actual demand in the situation of demanding power grade, speed regulation performance and reliability. Multiphase permanent magnet synchronous motor (PMSM) has wide development space because of its advantages of high power density, low torque ripple and high reliability. In this paper, the multi-dimensional space vector modulation technology, vector control and direct torque control technology of dual-three-phase permanent magnet synchronous motor are analyzed. Then a new circuit topology of single inverter driving multiple motors is studied. Firstly, the vector space decoupling mathematical model of dual three-phase permanent magnet synchronous motor is established. The traditional SVPWM technique only controls the reference voltage vector of 偽-尾 plane, but neglects the reference voltage vector of x-y plane, which results in large current harmonics in the x-y plane, increases the copper consumption of the motor and affects the control performance of the motor. Based on the idea of multidimensional space vector modulation, the maximum four-vector SVPWM technique and the maximum two-vector and sub-large two-vector SVPWM technique are studied in this paper. The reference voltage vectors of the 偽-尾 plane and the x-y plane can be strictly controlled at the same time. The simulation results show that the two SVPWM control algorithms can not only improve the utilization ratio of DC bus voltage, but also eliminate the 57th harmonic of x-y plane, and make the output voltage change with pure sine. Then, the control technology of double-three-phase permanent magnet synchronous motor (PMSM) is studied. The stator windings of two dual-three-phase permanent magnet synchronous motor (PMSM) are connected in series by a reasonable phase-sequence conversion rule, and a six-phase voltage source inverter is used to drive and control the stator windings. In order to realize the independent operation of two motors, an SVPWM control strategy with double modulators is adopted in this paper. Under the power supply of single inverter, the output phase voltage contains only the fundamental components of the voltage required by each of the two series motors. The decoupling control of two series motors is realized. The simulation results show that changing the speed or load of any motor in the series system has no effect on the operation of the other motor. The theoretical analysis is consistent with the simulation results, and the correctness and feasibility of the scheme are verified.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM341

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