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首页> 外文期刊>Russian electrical engineering >High-Speed Synchronous Machines: a Computer System for the Study of the Effect of Rotor Radial Eccentricity on Electromagnetic Forces
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High-Speed Synchronous Machines: a Computer System for the Study of the Effect of Rotor Radial Eccentricity on Electromagnetic Forces

机译：高速同步电机：用于研究转子径向偏心距对电磁力影响的计算机系统

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摘要

The problem of the development of modern bearings (magnetic, gas, etc.) for high-speed machines with a wide range of capacities (from tens of kilowatts to megawatts) and rotational speeds (from 6000 to 60000 rpm) used in oil and gas production, robotics, space technology, and mini gas-turbine power plants is considered. The distribution of forces applied to the rotor shaft in different modes of operation is investigated including the case of shaft eccentricity. In operation, the eccentricity should not exceed 5%. A computer system is designed on the basis of the numerical method for field (2D) computation in the active part of the machine. The distribution of forces is analyzed taking into account the saturation of the magnetic circuit of the machine and the harmonic content of the mutual magnetic flux (flux in the gap). When calculating these forces in the no-load mode of operation, it was assumed that, in machines with permanent magnets, the mutual magnetic flux on the rotor is about 10-15% higher than under the rated load because of the demagnetization effect of the armature reaction. The mutual magnetic flux was specified depending on the type of rotor magnets. The computer system takes into account the relative position of the rotor poles relative to the stator field reaction under load (load angle 0). It is also taken into account that, during use, the resulting mutual magnetic flux is distorted (compared to the no-load mode). As a result, a number of additional high harmonics appear in the gap, which affect the forces applied to the rotor shaft. Load angle 0 is calculated using graphical options of the simulation package by the iteration method. An algorithm for the implementation of this method is described. The distribution of the radial forces along the rotor shaft surface (differential parameter) and the total radial attraction force applied to the rotor shaft (integral parameter) are calculated for different values of eccentricity and different modes of operation of high-speed machines.
机译：开发用于石油和天然气的各种容量（从几十千瓦到兆瓦）和转速（从6000到60000 rpm）的高速机器的现代轴承（磁性，气体等）的开发问题生产，机器人技术，太空技术和小型燃气轮机发电厂。研究了包括轴偏心情况在内的不同工作模式下施加到转子轴上的力的分布。在运行中，偏心率不应超过5％。基于用于计算机活动部分中的场（2D）计算的数值方法，设计了一个计算机系统。分析力的分布时要考虑到电机磁路的饱和度和互磁通量（间隙中的磁通量）的谐波含量。在空载运行模式下计算这些力时，假定在具有永磁体的电机中，由于转子的去磁作用，转子上的互磁通量比额定负载下高约10-15％。电枢反应。根据转子磁体的类型指定互磁通量。该计算机系统考虑了在负载（负载角为0）下转子磁极相对于定子磁场反作用的相对位置。还应考虑到，在使用过程中，产生的互磁通将发生失真（与空载模式相比）。结果，在间隙中出现了许多额外的高次谐波，这会影响施加到转子轴上的力。使用仿真程序包的图形选项通过迭代方法计算载荷角0。描述了用于实现该方法的算法。对于不同的离心率值和不同的高速机械运行方式，计算沿转子轴表面的径向力分布（微分参数）和施加到转子轴的总径向吸引力（积分参数）。

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