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

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...

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 structure of the distributed winding of the motor with low withstand voltage, hindering the application of the rotating field transformer in the industrial field

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