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An isolated three-phase to single-phase transformer

An isolated, transformer technology, applied in the field of power transformers, can solve the problems of low efficiency, high cost, and many links.

Active Publication Date: 2018-06-05
济宁众力电机车制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This conversion has the following disadvantages: ① many links, high cost, and complex structure; ② low efficiency; ③ output waveform is not completely sinusoidal, with high-order harmonics; ④ high failure rate
The three-phase-to-single-phase transformers in the prior art have not really solved the problem of serious unbalance of three-phase currents

Method used

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  • An isolated three-phase to single-phase transformer
  • An isolated three-phase to single-phase transformer
  • An isolated three-phase to single-phase transformer

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Embodiment Construction

[0042] Attached below Figures 1 to 6 The specific embodiment of the present invention is further described:

[0043] The isolated three-phase-to-single-phase transformer includes primary components and secondary components. The primary component is similar to the stator of a three-phase AC asynchronous motor. It uses a primary annular core 1, which is composed of laminated annular silicon steel sheets. The inner side of the primary annular iron core is slotted along the axial direction, and the primary three-phase symmetrical winding 2 is placed in the slot. The primary three-phase symmetrical winding is connected in star or delta. The specific connection method is determined according to the winding withstand voltage and power supply voltage. The primary three-phase symmetrical winding The windings are spaced at 120° (electrical angle). The primary component is similar to the stator of a three-phase AC asynchronous motor, and can be made into 2-pole, 4-pole, 6-pole and othe...

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Abstract

The invention discloses a separating type transformer capable of transforming three phases into single phase. The transformer comprises a primary assembly and a secondary assembly, wherein the primary assembly comprises a primary annular iron core and a primary three-phase symmetric winding; a groove is axially formed in the inner side of the primary annular iron core; the primary three-phase symmetric winding which is connected with a three-phase AC power supply is embedded into the groove; a primary cavity is formed in the primary assembly; the secondary assembly comprises a secondary iron core, and a secondary winding which coils the secondary iron core; the secondary assembly is positioned into the primary cavity; each phase of the three-phase AC power supply can be used for supplying power to the primary three-phase symmetric winding, and a rotating magnetic field can be formed in the primary cavity; the rotating magnetic fields are treated as mediums to uniformly absorb and collect the energy of the three phases of the power supply and then induce the energy of the three phases to the secondary winding; in addition, the primary assembly and the secondary assembly are electrically separated during the transforming process. The separating type transformer capable of transforming the three phases into the single phase has the phase transforming, voltage transforming and frequency varying functions, so that the transformer has a wide application prospect.

Description

technical field [0001] The invention relates to the field of power transformers, in particular to an isolated three-phase-to-single-phase transformer. Background technique [0002] There are two types of three-phase to single-phase transformers in the prior art: [0003] (1) AC-DC-AC inverter class [0004] The working process is to first rectify the three-phase alternating current into direct current, and then invert the direct current into single-phase alternating current. This conversion has the following disadvantages: ① many links, high cost, and complex structure; ② low efficiency; ③ output waveform is not completely sinusoidal, with high-order harmonics; ④ high failure rate. [0005] (2) The direct transformation class has the following types: [0006] (1) Ordinary three-phase transformer transforms the voltage, a certain phase on the output side is exchanged end to end, the phase shifts by 180°, and then the three phases are connected in series to implement single...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F30/14H01F27/30H01F27/28H01F27/26H01F27/245
CPCH01F27/245H01F27/266H01F27/2828H01F27/306H01F30/14
Inventor 常传忠
Owner 济宁众力电机车制造有限公司
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