CN207883466U - A kind of tractive transformer - Google Patents

Abstract

The utility model is related to a kind of transformers, and in particular to a kind of tractive transformer for electrified railway power supply.The utility model includes fuel tank, device body, winding, it is characterised in that：The tractive transformer includes that a fuel tank and two groups of device bodies, every group of high-voltage winding are located at the outside of corresponding low pressure winding.After the utility model is used in electric railway system, tractive transformer no-load loss in the prior art and the excessively high technical problem of no-load current can be solved.

Description

A kind of tractive transformer

Technical field

The utility model is related to a kind of transformers, and more specifically, the utility model relates generally to a kind of for electrified iron The tractive transformer of road power supply.

Background technology

Low-carbon economy is greatly developed, promotes green consumption, energy conservation and environmental protection, electric railway is also just towards energy-saving side To development.With the fast development of high-speed railway, the quantity and capacity of tractive transformer become increasing, and China is electrified Rail traction rate of load condensate is not but high, and most time is in no-load running or underrun state, leads to the sky of tractive transformer What load-loss, no-load current problem became can not be ignored.

Laminated core structure in the prior art has been difficult that no-load loss and no-load current is greatly reduced, more other energy saving Technology, rewinding material structure technology have a clear superiority in economy and feasibility.Laminated core structure, stem and iron yoke are respectively by silicon Successively stack forms steel disc, and for the entire shape of iron core in back-shaped, stem and iron yoke seam are in 45 at four angles⁰, the magnetic flux side of iron core To being closed along iron core, the magnetic conduction direction of lamination along lamination rolling direction, in the seam crossing iron core of stem and iron yoke The magnetic conduction direction of piece is inconsistent with flow direction, corner, and the no-load current of iron core, no-load loss is caused to increase.Core limb with Four corners of iron yoke press 90⁰Turn, the weight of iron core is big, and no-load loss and the weight of iron core are proportional, lead to the transformer No-load loss is high.Therefore, the no-load loss of transformer how is reduced, no-load current becomes urgent problem to be solved.

Utility model content

The purpose of this utility model is that against the above deficiency, a kind of tractive transformer is provided, it is expected to solve existing skill The technical problems such as tractive transformer no-load loss height, no-load current height in art.

In order to solve the above technical problems, the utility model uses following technical scheme：

The utility model provides a kind of tractive transformer, and the tractive transformer includes fuel tank, it is characterised in that：It is described Fuel tank internal is equipped with the first device body and the second device body, and the first device body includes the first iron core, the first winding, the second winding, The tertiary winding and the 4th winding, the second device body include the second iron core, the 5th winding, the 6th winding, the 7th winding and the 8th Winding；First winding and the tertiary winding are located at the outside of the second winding and the 4th winding, the 5th winding and the 7th around Group is positioned at the outside of the 6th winding and the 8th winding.

Further, the structure of the iron core is rewinding material.

Further, the rewinding material is formed by the wide different silicon steel sheet stack of piece.

Further, the silicon steel sheet is in 40 ° ~ 50 ° in the bending of four angles of iron yoke.

Further, the stack mode of the silicon steel sheet is piece wide direction perpendicular to the length of iron core and the wide plane constituted.

Further, first iron core has the first stem seam and the second stem seam, the first stem seam With the position of the second stem seam in the first winding, the second winding, the external homonymy of the tertiary winding and the 4th winding, described second Iron core has third stem seam and the 4th stem seam, and the position of the third stem seam and the 4th stem seam is the 5th Winding, the 6th winding, the external homonymy of the 7th winding and the 8th winding.

Further, first winding, the tertiary winding, the 5th winding, the 7th winding is high-voltage winding, and described second Winding, the 4th winding, the 6th winding, the 8th winding is low pressure winding.

Further, the connection type of the winding is：For high-voltage winding, high-voltage winding one end on one group of iron core is simultaneously System A phases are connected in, high-voltage winding one end on another group of iron core is simultaneously connected in system C phases, this two groups of iron core high-voltage windings Other end whole is simultaneously connected in system B phases；For low pressure winding, low pressure winding one end on one group of iron core is simultaneously connected in system T1, another to terminate at system X1, low pressure winding one end on another group of iron core is simultaneously connected in system T2, and the other end is simultaneously connected in and is Unite X2.

Compared with prior art, the utility model has the beneficial effects that：The tractive transformer has two groups of device bodies, iron core It is rewinding material structure, the piece wide direction of the silicon steel sheet laminated core structure that compares has rotated 90 °, and entire rewinding material is divided into two up and down Part, for two-part seam on two stems, and positioned at the homonymy of winding, two parts are all by silicon steel sheet at four of iron yoke The angle that angle bends 40 ° ~ 50 ° forms octagon, constitutes rewinding material, and by the wide different silicon steel sheet of piece, successively stack forms iron core, The orientation of cold rolled silicon steel is given full play to, the flow direction of transformer is consistent with the rolling direction of silicon steel sheet always, octagon Silicon steel sheet iron core angle can also be made to mitigate again.The above can be such that no-load loss and no-load current is greatly lowered.Seam Position can't change the flow direction of transformer, and the influence to no-load loss and no-load current is negligible, will not therefore increase No-load loss and no-load current.

Description of the drawings

Fig. 1 is the structural schematic diagram for the tractive transformer that the utility model embodiment provides.

Fig. 2 is the tractive transformer coil connection diagram that the utility model embodiment provides.

Specific implementation mode

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.

Embodiment 1：The utility model includes fuel tank 1, the first iron core 8, the second iron core 9, the first winding A1, the second winding T11, the tertiary winding A2, the 4th winding T12, the 5th winding C1, the 6th winding T21, the 7th winding C2, the 8th winding T22, wherein First device body 2 and the second device body 3 be installed inside fuel tank 1, the first device body 2 includes the first iron core 8, the first winding A1, the Two winding T11, tertiary winding A2 and the 4th winding T12, the second device body 3 include the second iron core 9, the 5th winding C1, the 6th Winding T21, the 7th winding C2 and the 8th winding T22, the first winding A1, tertiary winding A2, the 5th winding C1, the 7th winding C2 is located on the outside of the second winding T11, the 4th winding T12, the 6th winding T21 and the 8th winding T22.

In order to reduce no-load loss and no-load current, the present embodiment by restudying and improving to tractive transformer, The device body quantity of tractive transformer is set as two, high-voltage winding is mounted on the outside of low pressure winding, and such design can be with Three-phase voltage is become into two-phase.

Embodiment 2：In order to reduce no-load loss and no-load current, the iron core of tractive transformer provided by the utility model is Rewinding material structure, be made of the wide different silicon steel sheet 10 of piece, while the piece wide direction of silicon steel sheet perpendicular to corresponding iron core length and The plane that width is constituted, the described wide direction laminated core structure that compares have rotated 90 °, and entire iron core is divided into two parts up and down, and two Partial seam can achieve the purpose that reduce no-load loss and no-load current in this way on two stems.

Embodiment 3：In order to save material, cost is reduced, the iron core is to bend 40 ° at four angles of iron yoke by silicon steel sheet ~ 50 ° of formation octagons, such design can be such that iron core angle mitigates again, than existing laminated core techniques save material.

Above embodiment can be such that no-load loss and no-load current is greatly lowered, and position existing for seam can't change Become flow direction, the influence to no-load loss and no-load current can be ignored, and no-load loss and no-load current will not be therefore increased.

Embodiment 4：Fig. 2 shows coil connection types provided by the utility model, wherein the first winding A1, the tertiary winding A2, the 5th winding C1, the 7th winding C2 be high-voltage winding, the second winding T11, the 4th winding T12, the 6th winding T21, the 8th around Group T22 is low pressure winding.

In order to make three-phase become two-phase, the connection type that the winding of the utility model uses is：For high-voltage winding, first One end parallel connection of winding A1 and tertiary winding A2 is followed by system A phases, after one end parallel connection of the 5th winding C1 and the 7th winding C2 It is connected on system C phases, the first winding A1, tertiary winding A2, the other end parallel connection of the 5th winding C1, the 7th winding C2 are followed by system B phases.

For low pressure winding, the second winding T11 and the 4th winding T12 one end parallel connections are followed by system T1, and the other end is in parallel It is followed by system X1, the 6th winding T21 and the 8th winding T22 one end parallel connections are followed by system T2, another to terminate at system X2。

For the embodiment by the design to high-voltage winding and low pressure winding connection type, can reach three-phase becomes two-phase Purpose.

Although reference be made herein to the utility model is described in multiple explanatory embodiments of the utility model, still, It should be understood that those skilled in the art can be designed that a lot of other modification and implementations, these modifications and implementations It will fall within scope and spirit disclosed in the present application.More specifically, it discloses in the application, drawings and claims In range, a variety of variations and modifications can be carried out to the building block and/or layout of theme combination layout.In addition to building block And/or outside the modification and improvement of layout progress, to those skilled in the art, other purposes also will be apparent.

Claims (9)

1. a kind of tractive transformer, including fuel tank（1）, it is characterised in that：The fuel tank（1）Inside is equipped with the first device body（2） With the second device body（3）, the first device body（2）Including the first iron core（8）, the first winding（A1）, the second winding（T11）, third Winding（A2）With the 4th winding（T12）, the second device body（3）Including the second iron core（9）, the 5th winding（C1）, the 6th winding （T21）, the 7th winding（C2）With the 8th winding（T22）；First winding（A1）With the tertiary winding（A2）Positioned at the second winding （T11）With the 4th winding（T12）Outside, the 5th winding（C1）With the 7th winding（C2）Positioned at the 6th winding（T21）With 8th winding（T22）Outside.

2. tractive transformer according to claim 1, it is characterised in that：First iron core（8）With the second iron core（9）'s Structure is rewinding material.

3. tractive transformer according to claim 2, it is characterised in that：The rewinding material is by the wide different silicon steel sheet of piece （10）It constitutes.

4. tractive transformer according to claim 3, it is characterised in that：The silicon steel sheet（10）It is curved at four angles of iron yoke Folding is in 40 ° ~ 50 °.

5. tractive transformer according to claim 1, it is characterised in that：First iron core（8）Silicon steel sheet piece it is wide Direction is perpendicular to the first iron core（8）Length and the wide plane constituted, second iron core（9）Silicon steel sheet piece wide direction it is vertical In the second iron core（9）Length and the wide plane constituted.

6. tractive transformer according to claim 1, it is characterised in that：First iron core（8）It is connect with the first stem Seam（4）With the second stem seam（5）, the first stem seam（4）With the second stem seam（5）Position in the first winding （A1）, the second winding（T11）, the tertiary winding（T2）With the 4th winding（T12）External homonymy, second iron core（9）With Three stem seams（6）With the 4th stem seam（7）, the third stem seam（6）With the 4th stem seam（7）Position Five windings（C1）, the 6th winding（T21）, the 7th winding（C2）With the 8th winding（T22）External homonymy.

7. tractive transformer according to claim 1, it is characterised in that：First winding（A1）, the tertiary winding（A2）, 5th winding（C1）, the 7th winding（C2）It is high-voltage winding, second winding（T11）, the 4th winding（T12）, the 6th around Group（T21）, the 8th winding（T22）It is low pressure winding.

8. tractive transformer according to claim 1 or claim 7, it is characterised in that：First winding（A1）And the tertiary winding （A2）One end parallel connection be followed by system A phases, the 5th winding（C1）With the 7th winding（C2）One end parallel connection be followed by be System C phases, first winding（A1）, the tertiary winding（A2）, the 5th winding（C1）, the 7th winding（C2）Other end parallel connection be followed by In system B phases.

9. tractive transformer according to claim 1 or claim 7, it is characterised in that：Second winding（T11）With the 4th winding （T12）One end parallel connection is followed by system T1, and other end parallel connection is followed by system X1, the 6th winding（T21）With the 8th winding （T22）One end parallel connection is followed by system T2, another to terminate at system X2.