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NEW DESIGN OF THREE-PHASE TRANSFORMER
WITHOUT COPPER WINDING
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In 1984, the author obtained the author's certificate of the USSR No. 1089639, MKI: H01F33 / 00 called three-phase transformer, in which the role of copper winding is performed by a steel magnetic core. Such a transformer retains all the parameters from the traditional one, but it does not have an expensive copper winding. This is the advantage of this transformer, and its cost-effectiveness.
In the known transformer, the magnetic flux conductors and the same conductive windings cover each other (mutually coupled) at an angle of 60 ° . This mutual coverage is necessary for closing magnetic fluxes around electrical currents created by them. This ensures the use of the effect of electromagnetic induction (M. Faraday, 1831) with the operation of the transformer. According to this effect, the magnetic conductor must intersect with the conductors of the electrical winding at a right angle. Under this condition, the efficiency of using the Faraday effect will be greatest, but in the known transformer this angle is only 60 ° , which is a disadvantage.
A new configuration of a transformer without a copper winding is proposed, in which the electrically conductive windings of the magnetic circuit intersect at an angle of 90 ° , the most advantageous for using the Faraday effect.
In the proposed transformer, each winding of the magnetic circuit in the form of a concentric system covers two other similar systems, and they are all positioned relative to each other at an angle of 90 ° (see Figure 1).
In Figure 1, 1, 2, and 3 indicate the windings (primary and secondary) of all three phases.
At the transformer, according to the author. Certificate No. 1089639, there is one more drawback. It was inherited by the proposed transformer (see Figure 1). The fact is that assembling such transformers is difficult.
The construction of yet another new transformer of improved processability is proposed. The winding of all three concentric systems of this transformer is carried out simultaneously and as a result represents a single three-dimensional concentric system (see Figure 2)
In Figure 2, under 1, 2 and 3, three phase windings are indicated.
A schematic representation of the device for
Fabrication (winding) of a new transformer.
Under 1, 2 and 3 are marked steel tapes covered with insulation and rolled into rolls 4, 5 and 6 respectively. Each roll rotates on the axis with the bar 7, 8 and 9 respectively. Each rod is attached to the shafts 10, 11 and 12, respectively. The axes 13, 14 and 15 of each shaft 10, 11 and 12, respectively, are directed to the center of the faces 16, 17 and 18 of the central technological cube, respectively. The cube is fixed to the base 19 by means of a rod 20, whose axis passes through the largest diagonal of the cube. The shafts 10, 11 and 12 rotate synchronously. This ensures a simultaneous winding of the transformer windings.
The conclusions to the phase windings are connected in a known way. The technological cube is made of a magnetic soft material.
The proposed constructive (layout) solution can already find application in the development and manufacture of low-power transformers. For the development of medium and high power transformers, additional developments may be required, which it is better to contact the author.
The author is Vladimir Sukhanov. Description of the new three-phase transformer is registered as an intellectual product in the All-Russian Scientific and Technical Center of the VNTITS of the Ministry of Industry, Science and Technology of the Russian Federation on December 25, 2000 under number 72200000050. The text of the description is stored in the Information Fund of the VNTIC.
Published in the Bulletin of the VNTITS "Ideas of the Hypothesis of Decision" number 1, 2001.
Date of publication 01.24.2004