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通过三相立体卷铁心变压器在不同磁密下的空载损耗试验,对空载损耗的工艺系数进行了分析总结,阐述了立体卷铁心变压器空载损耗两种计算方法的差异和适用范围。 相似文献
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由保定晓星天威变压器有限公司研制的S11-M·R·L型立体卷铁心配电变压器是在三相平面排列卷铁心变压器的基础上,将铁心的排列方式进行了合理的立体三角形组合。这种设计结构紧凑,使三相铁心磁路完全对称,可减小磁阻以及噪声,降低励磁电流和空载损耗。该产品适用于10kV配电网中。 相似文献
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本文对三相叠铁芯和卷铁芯配电变压器性能参数用单相和三相电源测量的结果进行比较、分析,得出了三相三柱平面卷铁芯变压器不宜用单相法测量空载损耗、空载电流的结论。 相似文献
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分析了H级三维立体D形卷铁心的结构、制造工艺和产品性能,从结构、磁路、磁通向量分析、耗电费用等方面对三维立体D形卷铁心、平面叠片式铁心、三相三框卷铁心、三相四框五柱卷铁心进行了技术和经济性能比较,认为三维立体D形卷铁心具有磁路对称,空载损耗、空载电流、噪声小,带负载能力强,运行费用低等特点,符合节能环保的要求。运行结果表明,采用三维立体D形卷铁心变压器能使10kV母线电压畸变率从6.77%下降到2.97%。 相似文献
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江西大族电源科技有限公司(原江西丰电三维电气有限公司)设计开发的三维立体卷铁心全密封油浸式变压器改变了传统变压器的磁路结构和变压器的整体布局,使得产品不仅具备一般油浸式变压器的全部优点,而且三相磁路完全对称,使三相空载电流平衡,降低了空载电流和空载损耗,具有体积小、质量小和噪声低的特点。 相似文献
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变压器空载电流谐波测量的分析 总被引:1,自引:0,他引:1
从空载电流谐波测量的出发,根据空载电流与励磁电流之间的相互关系,对典型结构变压器的空载电流谐波测量进行了定性分析,指出空载电流的谐波除了与铁心的饱和程度有关外,还与变压器的结构形式以及三相结构的不对称程度有关。 相似文献
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Permanent-magnet brushless machines with unequal tooth widths and similar slot and pole numbers 总被引:1,自引:0,他引:1
This paper presents a comparative study of three-phase permanent-magnet brushless machines in which the slot and pole numbers are similar, with reference to conventional brushless dc machines in which the ratio of the slot number to pole number is usually 3 : 2. Three different motor designs are considered. Two have equal tooth widths, with one having a coil wound on every tooth and the other only having a coil wound on alternate teeth, while the third machine also has coils wound on alternate teeth but these are wider than the unwound teeth while the width of their tooth tips is almost equal to the rotor pole pitch in order to maximize the flux linkage and torque. Analytical and finite-element methods are employed to predict the flux-linkage and back-electromotive-force waveforms, and the self- and mutual-inductances, and these are shown to be in good agreement with measured results. It is also shown that the third machine is eminently appropriate for brushless dc operation. 相似文献
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讨论了立体叠铁心三框式、立体叠铁心三柱式和立体卷铁心准三柱式变压器的铁心结构,并阐述了它们与节约材料(节电),节省剪、叠(卷)铁工时和节省横剪(卷)设备费的关系,指出了三相平面卷铁心结构的种类。 相似文献
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Sonia LevaAuthor Vitae 《Electric Power Systems Research》2011,81(1):193-201
A three-phase model of asynchronous machines operating at medium or high frequencies is presented. It can be used to study the propagation of surge waves along the stator windings of induction form wound machines.The model is derived from an analogy with a three-phase transmission line. The use of time-space Clarke vectors allows the introduction of mutual coupling between phases. The analytical expressions for voltage waves are derived by means of the Laplace approach to the solution of hyperbolic partial differential equations.Some applicative examples confirm the model validity and can underline some aspects of the project of three-phase windings. 相似文献
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本文主要介绍了隔爆型绕线转子三相异步电动机的特点,叙述了绕线式三相异步电机的几种常用的启动、调速方法,对比了各种启动、调速方法的优缺点。 相似文献