CN201984946U - Three-phase transformer with two output functions - Google Patents

Abstract

A three-phase transformer with two output functions is characterized in that a secondary coil of the transformer, which has the same wire diameter as an existing coil, adopts bifilar winding, the circle number of the secondary coil is half of that of an existing secondary coil, and the bifilar circle number is the same as the circle number of the existing secondary coil, namely a three-phase secondary coil is provided with twelve wire ends, and each phase is provided with four wire ends which are composed of two wire heads and two wire tails. The wire ends have to be distinguished clearly, and the wire ends of each phase are respectively connected to twelve binding posts which transmit electricity to the outside. The novel three-phase transformer with two output functions does not influence existing factory production, does not increase much production cost, and is adapted to flexible application of the wiring method. One of the two output functions of the three-phase transformer is three-phase power source output which is the same as the function of the existing three-phase transformer. The other output function of the three-phase transformer is capable of integrating the three-phase power to perform one-phase power source output with no three-phase power source required. Accordingly, the number of wires which need wiring is reduced, and the cost and the workload are reduced. Users can effectively use the three-phase power of the three-phase transformer to perform the output of a power source. Therefore, three-phase electricity consumption is essentially balanced, the problems that one phase of the three-phase transformer independently over-consumes electricity and generates heat and accordingly shortens the service life of the transformer are resolved, and a three-phase high-voltage power grid can keep a balance.

Description

The three-phase transformer that two kinds of outputs are arranged

Technical field

It is the improvement that belongs on the existing three-phase power transformer.

Background technology

Single alternating current, three-phase alternating current is all sent by generator, generator moves sectioned coil to form with magnetic field energy, now generally all with magnetic field in the centre, rotate, the coil that has iron core maintains static outside, there are two polarity S and N in magnetic field, whenever rotate a circle and just gone cutting respectively, so the voltage and current that coil produced outside in a flash just is respectively by S and N, for negative, that is exactly an alternating current in a flash, if but placement is one group of coil, that is exactly a single-phase alternating current, for the space that utilizes motor and efficient people successively in the magnetic field placed around three groups of coils that have iron core, three groups of coils hexagonal angle each other on the position of motor.Turn round under the drive of external force, those three groups of coils are just cut by the magnetic field the subject of knowledge and the object of knowledge respectively successively, and three groups of coils have just produced voltage and current respectively at that time.The generation of Here it is three-phase alternating current, however as long as the line footpath in three groups of coils is all the same with the number of turns, the power of their generations all is basic identical except phase difference is arranged.

In general, power station (factory) and electricity consumer all have certain distance, such as in the river shoal or the hydroelectric power generation of reservoir, or away from the thermal power plant of metropolitan district, all rely on electric wire to do remote conveying but the existence of resistance is arranged because of the metal in the electric wire, the too many electric weight of loss often, so people are again in the efficient of wanting to improve transmission of electric energy by every possible means, just because of resistance is to be inversely proportional to power source voltage, voltage high resistance more is just more little, the current loss that flows through is just more little, just under this principle, people have made transformer, and the electricity that generator is sent becomes high pressure through step-up transformer again, superhigh pressure is transported to the destination then, has solved the low-loss of electric energy.But to will become suitable voltage to the electric energy that the is passed to utilization of safety again to supply voltage once more.The alternating voltage of China regulation 220V is user's voltage of standard.In this process, must use transformer, because of power supply is a three-phase alternating current, so will use three-phase transformer.

What three-phase transformer was exported is three-phase alternating current, that is to say three AC power that the voltage same phase is different.The conveying of three phase mains is the still conveying of electric energy not, still the conveying of a rotating magnetic field.But need the user or the electrical appliance and few of three-phase alternating current simultaneously, except the threephase motor of factory, need hardly.And for example the electrical network of three-phase alternating current is carried will four lines at least.And be unbalanced under the three-phase power consumption situation inequality.The method that solves so? the purpose of the utility model of Take me as I am invention.

Summary of the invention

The utility model provides a kind of three-phase transformer that two kinds of outputs are arranged, it is characterized in that: the secondary coil of transformer with the coil two-wire directly the same with original line and around, the number of turns is original half, but the number of turns of two-wire is added up just identical with the original number of turns, that is to say that the three-phase secondary coil has 12 the end of a thread respectively, every have 4 the end of a thread mutually, and two statures, two tails are received every phase and each the end of a thread respectively on 12 binding posts of outside transmission of electricity.

The output connection method of three-phase alternating current has star, delta connection.The voltage of output has phase voltage and line voltage, and star connection is in daily use, and delta connection is used hardly.Phase voltage is 220V, and line voltage is 380V.The voltage that produced of a phase coil is 220V in other words, and the series voltage of two-phase is 380V is not 440V, just because of the transient voltage that phase difference produced is differentiated, the different phenomenon of voltage in the same time is just arranged, and the pressure of exporting such as delta connection is 220V, and careless three-way in front two are 220V, that transient voltage, it is 220V that one phase line is arranged, and one is 160V mutually, and another is only 60V mutually.In learning at one time a phase voltage be the other two-phase voltage of 220V and be 220V also.The both positive and negative polarity of so mainly distinguishing their transient voltage just can be together in series them and use as a power supply.Series connection back three-phase sum voltage is 440V, as long as but do some improvement and just can make a kind of three phase mains transformer that two kinds of outputs are arranged.Method is that the coil that connects high pressure (elementary) of original manufacturer production is a bit constant, and the secondary coil number of total coils is also constant, but has changed winding method.Use the coil two-wire the same exactly and be original half, identical with the number of turns originally but the number of turns of two-wire is just added up around, the number of turns with original line footpath.Also be to say that the three-phase secondary coil has 12 the end of a thread respectively, every have 4 the end of a thread mutually, two statures, two tails will be distinguished one from the other between the end of a thread, receive the end of a thread of every phase on the binding post respectively, when needing the output three-phase alternating current, just the tail of a line of each phase is received the head of another line, then the head of each phase is separated separately, again the tail of each phase ground connection that links together, just and original three phase mains export the same.If do not need three phase mains, just the head and the head connection of two lines of every phase, tail and tail connection, and then connection between phase and phase is: first mutually and second head and connect mutually, second to be connected with third phase mutually be that tail connects tail, between them one of formation have two lines and around the series connection road.That is to say that three-phase circuit is cascaded forms an AC power and powers.

Do purpose like this and be in the output of needs three-phase electricity, do not influence its due function, need not be with the installation that reduces power transmission line in the three-phase electricity, four lines become that two costs reduce and the three-phase power consumption is even.

Description of drawings

Fig. 1, be the three phase mains transformer commonly used in the actual life and the output connection of its three-phase four-wire system, phase voltage is 220V, and line voltage is the three-phase alternating current grid line road figure of 380V.

Fig. 2, through my improved, according to have two-wire and around secondary coil, and each identical the end of a thread of distinguishing one from the other, three-phase has the line map of the novel three-phase transformer of 12 the end of a thread.

Fig. 3, be the line map of output connection of the three-phase four-wire system of novel three-phase transformer.

Fig. 4, be the line map of output connection of the single-phase two wires of my utility model three-phase transformer of inventing.

Embodiment

The high-voltage line number of turns of former manufacturer production remains unchanged, and three phases are all the same.The number of turns of low pressure (user's voltage) 220V also keeps original data basically, only changed original single line winding and become bifilar winding, if original single line pitch of the laps number is the N circle, two-wire is around being two 1/2nd N circles now, two the end of a thread of every phase were arranged originally, and three-phase is totally six the end of a thread.Now be four the end of a thread of every phase, three-phase is totally ten two the end of a thread, has only three-phase four-wire system output originally, now can be elected to be three-phase and four-line output arbitrarily, also can the output of single-phase two wires.As long as 12 the end of a thread of three-phase are distinguished one from the other, separate separately, just obtain different output with different connections.That is to say two-wire and around low pressure (user's voltage) voltage be two 110V, three-phase and four-line output in this way at first is connected into every two mutually 110V series connection 220V and then is connected into three-phase four-wire system.If just two 110V of every phase are together in parallel but be elected to be the output of single-phase 220V two lines, and then with first mutually with second with a joint, second phase and third phase connect being cascaded of tail with tail, just can form single-phase-two-wire system and export.Single-phase-two-wire output as long as at will also be called zero line to a end of a thread for ground wire with receiving, and that other end is earth-free to be exactly live wire.As long as three-phase voltage is that the voltage of normal its output definitely is the 220V alternating current.

Claims (1)

1. the three-phase transformer that two kinds of outputs are arranged, it is characterized in that: the secondary coil of transformer with the coil two-wire directly the same with original line and around, the number of turns is original half, but the number of turns of two-wire is added up just identical with the original number of turns, that is to say that the three-phase secondary coil has 12 the end of a thread respectively, every have 4 the end of a thread mutually, and two statures, two tails are received each the end of a thread of every phase respectively on 12 binding posts of outside transmission of electricity.

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