电梯用外转子永磁同步电动机的设计与研究

发布时间：2018-02-19 21:32

本文关键词： 外转子永磁同步电动机分数槽气隙磁密谐波分析偏心距　出处：《沈阳工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：现代社会中，电梯与人们生活紧密相连。电梯曳引电机，其性能直接影响电梯的起动、制动、加减速度等指标。外转子永磁同步电动机作为电梯驱动系统无齿轮曳引电机具有很多显著的优点，，特别是它具有效率高，机械噪音小，动态响应快，体积小的优点，因此其应用制造越来越广泛。首先分析外转子永磁同步电动机的双层短距分数槽绕组理论，分数槽可以降低齿槽转矩，并设计绕组连接方案。然后根据永磁同步电动机设计方法，进行设计两台外转子永磁同步电动机。使用磁路计算方法，进行初步估算电机的电磁参数。通过电磁场仿真软件Ansoft建立电动机的有限元模型，进行磁场计算，再根据场算参数空载漏磁系数等修正路算公式中的系数，完善电机设计结果。分别对两台电机进行了仿真分析，分别对比电机空载、负载运行数据，得出较好的设计方案。将方案一电机性能与已制造电机进行的测试结果对比，并进行误差分析，证明电机设计的可行性。然后使用MATLAB对所设计电机进行气隙磁密谐波的傅里叶分解，得到基波和谐波幅值，其中3次，5次，7次谐波较大。详细分析偏心磁极法削弱气隙磁密谐波的原理，得到气隙磁密偏心磁极时径向充磁或者平行充磁时的表达式，并使用解析方法计算出较好的偏心距。根据所得较好的偏心距，分别仿真偏心距h为45、47、50、53mm时的气隙磁密的谐波，经过计算对比，得出准确的电机性能较好的偏心距，证明结果的有效性，使电梯用外转子永磁同步电机运行更加平稳。
[Abstract]:In modern society, elevators are closely connected with people's lives. The performance of elevator traction motors directly affects the starting and braking of elevators. The external rotor permanent magnet synchronous motor (PMSM) as a gearless traction motor of elevator drive system has many advantages, especially it has the advantages of high efficiency, low mechanical noise, fast dynamic response and small volume. Therefore, its application manufacturing is more and more extensive. The theory of double spaced fractional slot winding of outer rotor permanent magnet synchronous motor (PMSM) is analyzed firstly, which can reduce the torque of tooth slot and design the connection scheme of winding, and then according to the design method of PMSM, Two permanent magnet synchronous motors with outer rotor are designed. The electromagnetic parameters of the motor are preliminarily estimated by using the magnetic circuit calculation method. The finite element model of the motor is established by the electromagnetic field simulation software Ansoft, and the magnetic field is calculated. Then, according to the coefficient of no-load flux leakage coefficient of field calculation parameter and so on, the design result of motor is perfected. The simulation analysis of two motors is carried out, and the running data of no-load and load are compared respectively. A better design scheme is obtained. The performance of the first scheme is compared with the test results of the manufactured motor, and the error analysis is carried out to prove the feasibility of the motor design. Then MATLAB is used to decompose the air-gap magnetic density harmonics of the designed motor, and the fundamental harmonic amplitude is obtained, in which the third and fifth harmonics are larger. The principle of the eccentric magnetic pole method to weaken the air-gap magnetic density harmonics is analyzed in detail. The expressions of radial or parallel magnetization of air-gap magnetic density eccentricity pole are obtained, and the better eccentricity is calculated by analytical method. According to the better eccentricity, the harmonics of air-gap magnetic density when the eccentricity h is 45,750mm or 53mm are simulated, respectively. Through calculation and comparison, the accurate eccentricity of the motor with better performance is obtained, which proves the validity of the result and makes the operation of the permanent magnet synchronous motor with external rotor more stable.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU857;TM341

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