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Three-phase to two-phase balance transformer

A phase balance, transformer technology, applied in the direction of transformers, fixed transformers, transformer/inductor coils/windings/connections, etc., can solve the problems of complex design and structure of three-phase to two-phase balanced transformers, and difficult to manufacture, and achieve low cost. , low impact, simple design and structure

Active Publication Date: 2012-07-11
TIANWEI YUNNAN TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention provides a three-phase to two-phase balanced transformer, which is used to solve the technical defects of the prior art that the three-phase to two-phase balanced transformer is complex in design, structure and difficult to manufacture

Method used

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  • Three-phase to two-phase balance transformer
  • Three-phase to two-phase balance transformer
  • Three-phase to two-phase balance transformer

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Embodiment Construction

[0021] refer to Figure 1-3 , figure 1 The schematic diagram of the wiring of the three-phase to two-phase balance transformer provided by the embodiment of the present invention; figure 2 The voltage vector diagram of the three-phase to two-phase balance transformer provided by the embodiment of the present invention; image 3 The schematic diagram of the winding connection of the three-phase to two-phase balance transformer provided by the embodiment of the present invention.

[0022] Such as figure 1 and 3 As shown, the three-phase to two-phase balance transformer provided in this embodiment includes an iron core (not shown in the figure), a primary three-phase winding and a secondary three-phase winding.

[0023] The three-phase windings on the primary side include A-phase winding 1, B-phase winding 2 and C-phase winding 3, and are connected in a delta connection, that is, A-phase winding 1, B-phase winding 2 and C-phase winding 3 are connected end to end; The number...

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Abstract

The invention provides a three-phase to two-phase balance transformer, which comprises an iron core, a primary-side three-phase winding and a secondary-side three-phase winding. The primary-side three-phase winding comprises an A-phase winding, a B-phase winding and a C-phase winding which are in triangular connection, and turns of the A-phase winding, the B-phase winding and the C-phase winding are equal. The secondary-side three-phase winding comprises an a-phase winding, a b-phase winding and a c-phase winding which are in star connection, turns of the a-phase winding and the c-phase winding are equal, turns of the b-phase winding is(3 -1) / 2 times of turns of the a-phase winding or the c-phase winding, the secondary-side three-phase winding outputs two-phase voltage, an outlet end of the a-phase winding and an outlet end of the c-phase winding are output head ends of the two-phase voltage, and an outlet end of the b-phase winding is a public output end of the two-phase voltage. The three-phase to two-phase balance transformer is simple in structure and design, easy to manufacture and low in cost, free of the process of impedance matching and is capable of reducing affection on the electric system from electrified railways.

Description

technical field [0001] The invention relates to transformer technology, in particular to a three-phase to two-phase balanced transformer, which belongs to the technical field of traction transformers. Background technique [0002] The traction transformer is an electric energy conversion device in the electrified railway traction power supply system that converts the external power supply voltage provided by the power system into the voltage required by the electric locomotive. [0003] Electric locomotives are powered by single-phase AC power, so traction transformers generally use single-phase transformers or three-phase to two-phase special transformers. When a single-phase transformer is used, two single-phase transformers are generally connected in a V shape to supply power to the up and down locomotives of the electrified railway. The advantage is that the transformer is easy to manufacture and the utilization rate of the core material is 100%. The disadvantage is tha...

Claims

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Application Information

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IPC IPC(8): H01F30/14H01F27/28H02J3/00
Inventor 吕维华杨宏伟
Owner TIANWEI YUNNAN TRANSFORMER
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