永磁发电机起动和空转时寄生转矩消除的对称共振机制

Q3 Energy
K. V. Dobrego
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引用次数: 0

摘要

. 永磁发电机定子的“粘滞”和振动使其磨损增大,噪声增大;同时,它们的运行效率也会降低。本文从理论上考虑了通过线圈与永磁体磁场在一定对称性下的相互补偿,消除无载永磁体发电机起动转矩和旋转转矩振荡的可能性。上述现象被称为共振。对于特定类别的永磁体和线圈场的模型相互作用势,在一定数量的线圈(Ns)和磁铁(Nr)下发生完全补偿,而对于{Ns, Nr}的其他组合,相互作用具有振荡性质。给出了各类电势的对应表,可作为研制发电机时设计决策的依据。π共振更可能发生在定子线圈数量为偶数,磁体数量为奇数的情况下,以及定子线圈数量的增加。考虑了定子相对于转子的单边布置和双面布置的情况。数值模拟表明,如果磁体或线圈的位置不准确,以及磁场势对称性破缺,容易破坏π共振。如果线圈的角度排列误差为1°,就会导致转子出现明显的“齿槽”现象,其能量相当于孤立磁体-线圈对的相互作用能量。对势的对称性的扭曲产生了在尺度上类似的结果,相当于增加了一个幅值为对称周期势幅值10%的残差函数。所发现的模式可用于设计具有低噪声和振动水平的高效发电机。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Symmetrical Resonance Mechanism of Elimination of Parasitic Torques of the Permanent Magnets Generator when Starting and Idling
. “Sticking” and vibrations of the stator of permanent magnet generators cause their increased wear, noise; also, their operation efficiency decreases. The article theoretically considers the possibility of eliminating the starting torque and oscillation of the rotation torque of the generator with permanent magnets without load due to mutual compensation of the interaction of coils with the field of permanent magnets at a certain symmetry of this field. The mentioned pheno-menon is called pi-resonance. For the specified class of model interaction potentials of the field of permanent magnets and coils, it has been shown that full compensation occurs with a certain number of coils (Ns) and magnets (Nr), while for other combinations of {Ns, Nr} the interaction is in the nature of oscillations. The corresponding tables for various classes of potentials are given which can serve as a basis for making design decisions when developing generators. Pi-resonance more probably takes place in the case of even number of stator coils and odd number of magnets, as well as with an increase in the number of stator coils. The cases of both one-sided and two-sided arrangement of the stator relative to the rotor are considered. Numerical modelling has shown that the pi-resonance is easily destroyed if the placement of magnets or coils is inaccurate, as well as by the magnet field potential symmetry breaking. An error in the angular arrangement of the coils of 1° can result in the appearance of a significant “cogging” of the rotor with energy of the order of the interaction energy of an isolated magnet – coil pair. A distortion of the symmetry of the potential yields a result similar in scale which is equivalent to the adding of a rump function with the amplitude of 10 % of the amplitude of the symmetric periodic potential. The patterns that have been discovered can be used in the design of efficient generators with reduced level of noise and vibration.
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来源期刊
CiteScore
1.60
自引率
0.00%
发文量
32
审稿时长
8 weeks
期刊介绍: The most important objectives of the journal are the generalization of scientific and practical achievements in the field of power engineering, increase scientific and practical skills as researchers and industry representatives. Scientific concept publications include the publication of a modern national and international research and achievements in areas such as general energetic, electricity, thermal energy, construction, environmental issues energy, energy economy, etc. The journal publishes the results of basic research and the advanced achievements of practices aimed at improving the efficiency of the functioning of the energy sector, reduction of losses in electricity and heat networks, improving the reliability of electrical protection systems, the stability of the energetic complex, literature reviews on a wide range of energy issues.
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