高温潜油永磁同步电机的设计研究

发布时间：2018-04-21 21:29

本文选题：高温潜油永磁同步电机 + 谐波含量　；参考：《沈阳工业大学》2017年硕士论文

【摘要】：目前,在油田生产中对稠油的开采普遍使用蒸汽驱(SAGD)技术。开采时需要对其进行加热处理,与此同时,潜油电泵所处的工作环境温度也会随之升高。较高的温度会对电机的性能造成影响,使电机的温升升高、效率下降,使用寿命也随之降低。为了适应高温油井的开采,本次论文主要设计了一台116型高温潜油永磁同步电机。对于永磁电机,气隙的磁通分布对电机铁心损耗及感应电势等电磁参数产生很大影响。对于非理想的正弦波气隙磁场因含有较大的空间谐波会使得附加损耗增加,加剧电机发热。谐波还会导致旋转电机相绕组交链磁链波动,进而引起相绕组反电势波动、相电流的脉动,致使电磁转矩发生波动。因此,削弱谐波含量对减少电机自身损耗,提高电机性能显得十分重要。本文首先在永磁电机的基本电磁理论的基础上,运用ANSYS Maxwell有限元软件分别对采用普通径向充磁和分段Halbach充磁方式的潜油电机进行了空载气隙磁密、绕组反电势以及负载电流、转矩等参数进行了仿真,并对相关曲线进行傅里叶变换。通过对比分析选取性能较佳的方案作为本文电机的设计方案。其次,对所选电机的损耗进行了计算,包括电机的绕组铜损、铁损及机械损耗等。最后,依据热力学分析基本理论,对潜油永磁电机建立了三维温度场计算模型,给出电机各主要部件的等效换热系数、导热系数的计算方法,并设定求解域的初始和边界条件。将所计算的损耗转换成电机的热生成率,运用ANASY Workbench有限元软件对工作环境温度为200℃的潜油永磁电机进行三维稳态温度场分析,得到电机内部温度场分布情况,并验证了电机设计的合理性。
[Abstract]:At present, the steam flooding (SAGD) technology is commonly used in the production of heavy oil in oil field production. It is necessary to heat the heavy oil during the mining. At the same time, the working environment temperature in the submersible electric pump will also increase. The higher temperature will affect the performance of the motor, and the temperature rise, the efficiency and the life of the electric machine will be reduced. In order to adapt to the exploitation of the high temperature oil well, this paper mainly designed a 116 type high temperature submersible permanent magnet synchronous motor. For permanent magnet motor, the flux distribution in the air gap has a great influence on the electromagnetic parameters such as the loss of the core and the induction potential. With the increase of loss, the motor heating is aggravated. The harmonic will also cause the fluctuation of the alternating chain magnetic chain of the phase winding of the rotating motor, and then cause the fluctuation of the reverse EMF of the phase winding and the fluctuation of the phase current. Therefore, it is very important to weaken the harmonic content to reduce the loss of the motor and improve the performance of the electric machine. On the basis of the basic electromagnetic theory, the ANSYS Maxwell finite element software is used to simulate the air gap magnetic density, the back EMF of the winding, the load current and the torque, and the Fourier transform of the phase curve. A scheme with better performance is taken as the design scheme of this motor. Secondly, the loss of the selected motor is calculated, including the copper loss, iron loss and mechanical loss of the motor. Finally, based on the basic thermodynamic analysis theory, a three-dimensional temperature field calculation model is established for the submersible permanent magnet motor, and the equivalent heat transfer of the main components of the motor is given. The calculation method of coefficient and thermal conductivity is used, and the initial and boundary conditions of the domain are set. The calculated loss is converted into the heat generation rate of the motor. The ANASY Workbench finite element software is used to analyze the three-dimensional steady temperature field of the submersible permanent magnet motor with the working environment temperature of 200 c, and the distribution of the temperature field inside the motor is obtained. The reasonableness of the motor design is proved.

【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM341

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