转子磁分路混合励磁同步电机驱动系统效率分析与优化

发布时间：2018-05-18 03:36

本文选题：混合励磁同步电机 + 转子磁分路　；参考：《南京航空航天大学》2015年硕士论文

【摘要】：转子磁分路混合励磁同步电机(Hybrid Excitation Synchronous machine,HESM)是在切向磁钢永磁同步电机基础上发展的一类新型混合励磁电机,具备功率密度高和气隙磁场可调的优点。励磁电流的引入使得HESM相比永磁同步电机增加了励磁损耗环节,同时也使HESM的效率优化控制增加了一个可控变量,特别是在高速弱磁控制区,励磁电流弱磁可显著减小直轴去磁电流消耗,有利于提升系统效率。本文重点研究转子磁分路HESM的效率优化控制方法。根据转子磁分路HESM的结构特征和运行原理,在定转子坐标系下建立了HESM的数学模型和损耗模型。对转子磁分路HESM驱动系统和电流控制技术进行了深入的研究,提出了HESM驱动系统效率优化控制策略。该策略基于传统矢量控制,根据电机运行特点和实际运行条件,针对电机不同的运行状况合理分配励磁电流和电枢电流,在满足电机运行要求的基础上提高驱动系统效率。在Matlab/simulink中建立了转子磁分路HESM的驱动系统仿真模型,对转子磁分路HESM的基本特性和所提出的电流控制策略进行了仿真分析,验证了仿真模型与控制策略的正确性。构建了100k W转子磁分路HESM驱动系统实验平台,进行了全面而深入的研究。实验内容包括励磁电流对起动性能和空载损耗的影响,以及励磁电流和电枢电流对电机运行特性和系统效率的影响。通过驱动调速实验,实施电流协调控制策略。结果表明,该策略提升了电机在不同工况下的稳定性及动态性能;实现了电机驱动系统运行效率的提升;拓宽了电机的恒功率运行范围,其恒功率运行范围达到1:3.5以上,验证了电流协调策略在转子磁分路HESM驱动系统中应用的可行性。
[Abstract]:The rotor magnetic shunt hybrid excitation synchronous motor (Hybrid Excitation Synchronous machine, HESM) is a new type of hybrid excitation motor developed on the basis of permanent magnet synchronous motor of tangential magnetic steel. It has the advantages of high power density and adjustable air gap magnetic field. The introduction of excitation current makes HESM increase the excitation loss ring of the permanent magnet synchronous motor. At the same time, a controllable variable is added to the efficiency optimization control of HESM, especially in the high speed and weak magnetic field. The excitation current weakening can significantly reduce the direct current depletion and improve the efficiency of the system. This paper focuses on the efficiency optimization control method of the rotor magnetic shunt HESM. Based on the structure characteristics of the rotor magnetic shunt HESM and the structure characteristics of the rotor magnetic shunt circuit Operating principle, the mathematical model and loss model of HESM are established in the fixed rotor coordinate system. The rotor magnetic shunt HESM drive system and current control technology are deeply studied. The efficiency optimization control strategy of the HESM drive system is proposed. The strategy is based on the traditional vector control, which is based on the running characteristics and actual operating conditions of the motor. The excitation current and armature current are allocated reasonably in different operating conditions of the motor, and the efficiency of the driving system is improved on the basis of meeting the requirements of the motor. The simulation model of the drive system of the rotor magnetic shunt HESM is established in Matlab/simulink, and the basic characteristics of the rotor magnetic shunt HESM and the proposed current control strategy are simulated and analyzed. The correctness of the simulation model and control strategy is verified. The experimental platform of the 100k W rotor magnetic shunt HESM drive system is constructed. The effect of the excitation current on the starting performance and the no-load loss, as well as the effect of the excitation current and armature current on the performance of the motor and the efficiency of the system are investigated. The results show that the strategy improves the stability and dynamic performance of the motor under different working conditions. It has improved the stability and dynamic performance of the motor under different working conditions, and realized the improvement of the operating efficiency of the motor drive system, widened the constant power range of the motor, and the constant power operation range of the motor reached more than 1:3.5, and the current coordination strategy was verified to be transferred. The feasibility of the application of the sub magnetic shunt HESM drive system.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM341

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