本文選題：開放式繞組 + 同步電機��； 參考：《哈爾濱工業(yè)大學》2014年碩士論文

【摘要】：永磁同步電機存在勵磁磁場不能調節(jié)的問題，而傳統(tǒng)的中小型電勵磁同步電機又存在電刷滑環(huán)問題。本文提出了一種新型的基于開放繞組的無刷諧波勵磁同步電機，該新原理電機既能方便的進行勵磁調節(jié)又去除了滑環(huán)電刷，具有重要的學術意義與應用價值。論文對基于開放繞組的無刷諧波勵磁同步電機進行了系統(tǒng)性的研究，主要包括諧波勵磁原理的分析，諧波勵磁性能的影響因素，勵磁繞組電流脈動的影響，電機內的齒諧波磁場影響，定子電流的控制策略，系統(tǒng)的仿真與實驗研究等。 首先分析了諧波勵磁原理，通過對電機內電樞磁場的理論分析，闡述了諧波繞組感應電動勢的產生機理，并對該新型勵磁原理進行了有限元分析驗證，為后續(xù)的研究奠定了理論基礎。 然后對適于諧波勵磁原理運行的電機結構進行研究。在傳統(tǒng)電勵磁同步電機的結構設計基礎上進行改變得到了諧波勵磁同步電機，對影響諧波勵磁性能的諧波繞組匝數，極弧系數，極靴厚度等因素進行了分析研究。對勵磁繞組電流穩(wěn)態(tài)時的波動情況進行了研究，分析了濾波電容對勵磁電流的影響。對電機內的齒諧波磁場以及高次諧波磁場的影響進行了理論分析與有限元分析研究，最終優(yōu)化了電機結構使其更適于諧波勵磁原理的運行。 針對諧波勵磁原理對定子電流的特殊要求，提出了在雙功率變換器中間矢量六邊形SVPWM調制的基礎上進行三次諧波注入的調制策略，并且對定子三次諧波電流采用比例諧振控制，，實現了定子三次諧波電流與定子基波電流的相互解耦控制與三次諧波電流的無靜差控制。在理論分析的基礎上建立了諧波勵磁同步電機及其控制系統(tǒng)的MATLAB仿真模型，仿真結果驗證了電機數學模型的正確性以及控制策略的有效性。 最后制作了無刷諧波勵磁同步電機的樣機，并搭建了其控制系統(tǒng)硬件實驗平臺，對諧波勵磁原理以及電機的功率變換與勵磁調節(jié)進行了實驗分析。與理論推導和仿真結果進行對比，實驗結果驗證了諧波勵磁原理的正確性以及所提控制策略的有效性，同時證實了該新原理電機方案的可行性。
[Abstract]:The permanent magnet synchronous motor (PMSM) has the problem that the excitation magnetic field can not be adjusted, while the traditional medium and small-sized electroexcitation synchronous motor has the problem of brush slip ring. In this paper, a new brushless harmonic excitation synchronous motor based on open winding is proposed. The new principle motor can not only easily adjust the excitation but also remove the sliding ring brush, which has important academic significance and application value. In this paper, a systematic study of brushless harmonic excitation synchronous motor based on open winding is carried out, including the analysis of harmonic excitation principle, the influence factors of harmonic excitation performance, and the effect of current pulsation of excitation winding. The influence of tooth harmonic magnetic field, stator current control strategy, system simulation and experimental research. Firstly, the principle of harmonic excitation is analyzed. Through the theoretical analysis of the armature magnetic field in the motor, the mechanism of the induction electromotive force of the harmonic winding is expounded, and the new excitation principle is verified by finite element analysis. It lays a theoretical foundation for further research. Then the structure of the motor which is suitable for the harmonic excitation principle is studied. Based on the structural design of the traditional electrically excited synchronous motor, the harmonic excitation synchronous motor is obtained. The factors affecting the harmonic excitation performance, such as the number of turns of harmonic windings, the coefficient of polar arc and the thickness of pole boots, are analyzed and studied. The fluctuation of excitation winding current in steady state is studied, and the influence of filter capacitance on excitation current is analyzed. The influence of the tooth harmonic magnetic field and the high harmonic magnetic field in the motor is analyzed theoretically and the finite element analysis is carried out. Finally, the structure of the motor is optimized to make it more suitable for the operation of the harmonic excitation principle. According to the special requirement of harmonic excitation principle to stator current, a modulation strategy of third harmonic injection based on intermediate vector hexagonal SVPWM modulation of dual power converter is proposed, and the third harmonic current of stator is controlled by proportional resonance. The mutual decoupling control of the third harmonic current and the fundamental current of the stator and the non-static difference control of the third harmonic current are realized. The MATLAB simulation model of harmonic excitation synchronous motor and its control system is established on the basis of theoretical analysis. The simulation results verify the correctness of the mathematical model and the effectiveness of the control strategy. Finally, the prototype of brushless harmonic excitation synchronous motor is made, and the hardware experimental platform of its control system is built. The principle of harmonic excitation and the power conversion and excitation regulation of the motor are analyzed experimentally. Compared with the theoretical derivation and simulation results, the experimental results verify the correctness of the harmonic excitation principle and the effectiveness of the proposed control strategy. At the same time, the feasibility of the new principle motor scheme is verified.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM341

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