基于电枢反应补偿原理的新型永磁同步电机

发布时间：2018-02-28 22:12

本文关键词： 永磁同步电动机磁饱和电枢反应补偿高转矩密度　出处：《电工技术学报》2014年03期 　论文类型：期刊论文

【摘要】：在永磁同步电机调速系统中,电机中电枢反应将引起铁心磁饱和,并进而导致电机的输出转矩随转矩电流增长明显钝化。分析表明造成该现象的主要原因是永磁电机的磁动势平衡机制存在缺陷。本文提出在永磁同步电机转子上增设一套电流可控的交轴励磁绕组,用以补偿电枢反应磁动势的作用,保证负载变化时电机气隙磁场基本维持恒定。这种基于电枢反应补偿原理的新型永磁同步电机突破了磁饱和对电磁转矩的限制,为提高永磁同步电机转矩密度开辟了新途径。文中给出了一台新型电机样机的设计方案。通过有限元仿真,验证了通过补偿电枢反应磁动势提高电机转矩密度的有效性,并分析了该电机带不同负载运行时的转矩、效率特性及其与传统电机的区别。
[Abstract]:In the speed control system of permanent magnet synchronous motor, armature reaction in the motor will cause magnetic saturation of iron core. The analysis shows that the main reason of this phenomenon is the defect of the balance mechanism of the magnetodynamic potential of the permanent magnet motor. In this paper, it is put forward that the rotor of the permanent magnet synchronous motor is in the rotor of the permanent magnet synchronous motor. Add a set of current-controllable AC-axis excitation windings, The new permanent magnet synchronous motor based on the principle of armature reaction compensation has broken through the limitation of magnetic saturation on the electromagnetic torque, which is used to compensate for the effect of armature reaction magnetoEMF, and to ensure that the air-gap magnetic field of the motor is basically constant when the load changes. In order to improve the torque density of permanent magnet synchronous motor (PMSM), a new design scheme of PMSM is presented in this paper. Through finite element simulation, the effectiveness of increasing motor torque density by compensating armature reactive magnetodynamic force is verified. The torque and efficiency characteristics of the motor with different loads and the difference between the motor and the traditional motor are analyzed.
【作者单位】：清华大学电机系电力系统及发电设备安全控制和仿真国家重点实验室;
【分类号】：TM341

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