Rotary magnetic field mechanism-adopted high-voltage transformer with variable phase number

A rotating magnetic field and transformer technology, applied in the field of transformers, can solve the problems of hindered application of rotating magnetic field transformers and low withstand voltage, etc.

Inactive Publication Date: 2017-07-04
SHANGHAI WIND NEW ENERGY TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in many applications, the input and output voltage of the transformer is medium and high voltage, which poses a challenge to the insulation struct

Method used

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  • Rotary magnetic field mechanism-adopted high-voltage transformer with variable phase number
  • Rotary magnetic field mechanism-adopted high-voltage transformer with variable phase number
  • Rotary magnetic field mechanism-adopted high-voltage transformer with variable phase number

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Embodiment Construction

[0019] figure 1 It is a schematic diagram of the overall shape and structure of the phase-changing transformer with distributed windings before improvement. In the figure, the primary side of the three-phase transformer with different phase numbers is equivalent to the rotor of the wound induction motor, and the winding of the three-phase star (or delta) connection is adopted, and the secondary side is a multi-phase structure, which is equivalent to the wound induction motor position of the stator. The windings on both sides are distributed windings. Because the transformer does not need a rotating shaft, nor does it need an iron core close to the shaft, but only one ring-shaped yoke can complete the magnetic circuit. When the primary side is embedded in the primary winding of the three-phase structure, after the three-phase alternating current is connected, the direction of the rotating magnetic field generated by the primary winding is radial flow, which is different from ...

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Abstract

The invention discloses a rotary magnetic field mechanism-adopted transformer with a variable phase number, and is a new product of transformer with a structure similar to a motor structure; the transformer can change an alternating current voltage as well as can change the phase number of a primary side and a secondary; through improvement of a polar structure and a winding of the transformer, the transformer can be suitable for satisfying requirements of input and output of high, middle and low voltages; the rotary magnetic field mechanism-adopted transformer with the variable phase number has convenience in wiring and design and quite simple manufacturing; the phases are symmetrical absolutely; incomparable higher symmetrical conditions, which cannot be achieved by the conventional transformer, are achieved by the high-voltage transformer disclosed by the invention from the aspects of hardware and design of a heat dissipation structure; and actually, a brand-new technological path is developed for a multi-phase rectifying transformer and an electrical railway.

Description

[0001] field of invention [0002] The invention belongs to the transformer in the field of electrical technology, relates to a device for transforming three-phase input voltage into a symmetrical voltage with an arbitrary phase number at the same frequency, and is a multi-phase transformer with a new structure. Background technique [0003] Power conversion is a change in the application form of electric energy. The conversion technology mainly includes rectification that converts alternating current into direct current, and inverter that converts direct current into alternating current. Among them, rectification is the most widely used form of conversion, that is, it is necessary to rectify alternating current into direct current for application. Since the current drawn by the unidirectional semiconductor rectifier device from the AC power system is non-sinusoidal, the current and voltage waveforms of the grid are distorted, and a rectifier transformer must be used to increa...

Claims

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Application Information

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IPC IPC(8): H01F30/14H01F27/28H01F27/30H01F27/08
CPCH01F30/14H01F27/085H01F27/2823H01F27/306
Inventor 於岳亮於宙瑞秋
Owner SHANGHAI WIND NEW ENERGY TECH
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