CN205354827U - Three single -phase pulse wave rectifier transformer - Google Patents

Abstract

The utility model provides a three single -phase pulse wave rectifier transformer that can alternate into three pulse wave alternating currents with the single phase alternating current electricity, it comprises a primary coil and three secondary winding and three post iron cores that have two short circuit rings, lay two short circuit rings on the stem stem of iron core both sides, the short circuit ring produces induced current when the magnetic flow process, the synthetic magnetic flow that passes through in the iron core post according to this induced electricity conductance system of lenz law lags behind, the hysteresis is relevant with the area that the short circuit ring surrounded, make the also corresponding hysteresis of current potential phase place of the secondary winding response of cover on the iron core post of both sides, the final current potential output of inducting that forms three different phase places in three secondary coil.

Description

A kind of single-phase three pulse wave rectifier transformators

Technical field

This utility model relates to single-phase alternating current and is transformed to galvanic Semiconductor Converting Technology field, is particularly applied to the rectifier transformer of single-phase relatively high power rectifier power source.

Background technology

Be currently needed for galvanic occasion be mostly adopt AC rectification mode obtain direct current energy.Large-power occasions is generally obtained high-quality DC source then through rectification by three-phase alternating-current supply after many arteries and veins rectifier transformer unsteady flow, and in some middle low power occasions owing to not having three-phase alternating-current supply to power, single phase ac electric rectification can only be adopted to obtain DC source.China's electrical network adopts the sinusoidal ac of 50Hz to power, and obtains the DC pulse electric current of 100Hz after over commutation, and this pulsation of current composition is big, and ripple factor, up to 47%, exists harmonic wave interference big, the shortcomings such as electrical source power factor is low.The measures such as the jumbo capacitor of actually used needs is filtered, voltage stabilizing can meet the needs of electronic equipment, and the high pressure capacitor of Large Copacity currently there is also a lot of technical problem on manufacturing and is difficult to overcome, and power supply manufacturing cost is higher.

The DC source that three phase mains obtains after over commutation for single phase poaer supply is just well a lot, first three-phase alternating current rectified after what obtain is the DC pulse electric current of 300Hz, the pulsating current that its pulsation of current composition obtains after being just significantly smaller than single-phase rectifier, DC current ripple factor after three phase rectifier only 18.27%, owing to ripple factor is little, follow-up rectification, filter circuit are relatively simple.

Summary of the invention

This utility model provides a kind of rectifier transformer that single-phase alternating current can be transformed into three pulse wave alternating currents, three pulse wave alternating currents are exported after this transformator converts, rectification obtains the DC pulse electric current of 300Hz again, thus obtaining pulsating current comparatively smoothly, greatly reduce supply harmonic interference, improve the power factor etc. of power converting circuit, help subsequent conditioning circuit to simplify the links such as filtering, voltage stabilizing with this, reduce the cost obtaining DC source.

This utility model to solve its technical problem and employed technical scheme comprise that a kind of power transformer that single-phase alternating current can be transformed into three pulse wave alternating currents, the three-limb core being pressed into by the silicon steel sheet stack of punching in advance, three secondary coils of one primary coil and two short-circuited conducting sleeve compositions being separately mounted on the stem stem of iron core both sides, its basic feature is to be positioned in two iron core column of both sides in three iron core column respectively to have a short-circuit annular groove, groove is respectively provided with a short-circuited conducting sleeve, the iron core transverse sectional area that one of them short-circuited conducting sleeve surrounds is 1/3rd of post core cross-sectional area, the iron core transverse sectional area that another short-circuited conducting sleeve surrounds is 2/3rds of post core cross-sectional area, three iron core column are respectively laid a secondary coil, primary coil is placed in center pinch, three secondary coils are connected into star or triangle exports three pulse current, as shown in Figure 1.

After primary coil passes into single-phase alternating current, producing a corresponding alternating flux in the core according to oersted law, this magnetic flux forms closed magnetic loop by finally returning to middle iron core column to both sides shunting after middle iron core column.Induced electromotive force can be produced according in the secondary coil 5 that faraday electromagnetic induction overlaps on intermediolateral column, this electromotive force phase place is identical with the current phase in primary coil, and in short-circuited conducting sleeve, induced current is first produced by the magnetic flux in the iron core of both sides, magnetic flux according to the generation of this induced current of Lenz's law can resist the change of former magnetic flux, lead system delayed by the resultant flux in iron core column, the area that hysteresis is surrounded with short-circuited conducting sleeve is relevant, the hysteresis surrounding area big is also big, therefore the actual magnetic flux phase place passed through in two iron core column each angle more corresponding than the stagnant later of magnetic flux phase place in middle iron core column, the electromotive force phase place of the secondary coil sensing being enclosed within the iron core column of both sides is also delayed accordingly, on the area difference coil that two stem stem short-circuited conducting sleeves surround, the electromotive force phase place of sensing is also different, the final induced potential output forming three outs of phase in three secondary coils.Different output voltages is obtained from primary coil turn ratio, to meet actually used needs by regulating secondary coil.

Advantage of the present utility model and obtainable usefulness be in common single phase power supply situation can transformed after can obtain three pulse wave alternating currents, the Rectified alternating current ripple factor obtained after three pulse wave alternating currents are rectified is low, harmonic wave interference is little, it is substantially reduced the energy storage capacitor capacity in follow-up filter circuit, thus simplifying regulator rectifier circuit, reduce single phase power supply occasion and obtain galvanic cost, be particularly suitable for the middle low power DC source of single phase power supply.

Accompanying drawing explanation

Accompanying drawing 1 is structural representation of the present utility model, 1 be transformer core, 2 be enclosed within primary coil in middle iron core column, 3 and 7 be enclosed within two short-circuited conducting sleeves in the iron core column of both sides, 4,5,6 be three secondary coils；

Accompanying drawing 2 this utility model core stamping structural representation, it is formed iron core by two panels E shape punching, and in the iron core column on one of which punching 8 both sides, each punching has a groove 9 and 10 for laying short-circuited conducting sleeve；

Accompanying drawing 3 is the three-dimensional core structure schematic diagram after being built up iron core by punching and laid upper two short-circuited conducting sleeves.

Detailed description of the invention

The first step silicon steel plate punching prefabricated punching of the iron core with short slot as shown in Figure 2；The former secondary coil of the second step voltage swing watt level coiling difference number of turn on demand；Prefabricated for iron core punching is inserted four coil endoporus and is laminated into iron core by the 3rd step, ultimately forms a complete transformator；Three secondary coils are connected into star or delta network outwards exports three pulse current and is supplied to follow-up rectified three-phase circuit, obtain DC source comparatively smoothly after rectified.

Claims (1)

1. single-phase three pulse wave rectifier transformators, the three-limb core that it is pressed into by the silicon steel sheet stack of punching in advance, three secondary coils of one primary coil and two short-circuited conducting sleeve compositions being separately mounted on the stem stem of iron core both sides, its basic feature is to be positioned in two iron core column of both sides in three iron core column respectively to have a short-circuit annular groove, groove is respectively provided with a short-circuited conducting sleeve, the iron core transverse sectional area that one of them short-circuited conducting sleeve surrounds is 1/3rd of post core cross-sectional area, the iron core transverse sectional area that another short-circuited conducting sleeve surrounds is 2/3rds of post core cross-sectional area, three iron core column are respectively laid a secondary coil, primary coil is placed in center pinch, three secondary coils are connected into star or triangle exports three pulse current.