CN2508366Y

CN2508366Y - Omnibearing closure magnetic circuit transformer

Info

Publication number: CN2508366Y
Application number: CN 01256577
Authority: CN
Inventors: 吴加林
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-15
Filing date: 2001-11-15
Publication date: 2002-08-28
Anticipated expiration: 2011-11-15

Abstract

The utility model discloses an omnibearing closed magnetic circuit type transformer, which relates to a transformer in an electric power equipment. The structure comprises an iron core and a coil, the iron core consists of an inner tube, an outer tube sleeved outside the inner tube, and an annular end cover covered on an annular part at the both ends of the inner tube and the outer tube, the coil is coiled in an annulus between the inner tube and the outer tube along the peripheral direction of the inner tube and the outer tube, the end of the coil is gotten through the iron core to extend outside the iron core, and the end covers of the inner tube and the outer tube are evenly formed by winding belt-shaped magnetic material with the insulating surface. The utility model has the advantages that the efficiency is high, the loss is low, and the material consumption is low.

Description

A kind of comprehensive closed magnetic circuit formula transformer

Relate to the field

The utility model relates to the transformer in the power equipment.

Background technology

The main composition of transformer is coil and iron core, the iron core of existing transformer and the structural relation of coil all be by coil be enclosed within one iron core-closed on, no matter be core formula iron core, or shell type core, all be the version of " line bag magnetic ", and all some iron core is exposed at outside the encirclement of coil and is not used, so its magnetic circuit not an omnibearing closed magnetic circuit, but there are shortcomings such as loss is big, efficient is not high, interference is big in the closed magnetic circuit of an opening.

Summary of the invention

The purpose of this utility model is the above-mentioned shortcoming that overcomes existing transformer, and a kind of high efficiency, low-loss, comprehensive closed magnetic circuit formula transformer that consumptive material is few are provided.

The purpose of this utility model existing by changing " line bag magnetic " structure realizes for this technical scheme of " disk pack line " structure.Its formation comprises iron core and coil, described iron core is made of inner core, suit urceolus and the annular end cap that is connected on inner core and the annular space position, urceolus two ends of lid outer tube, described coil along inside and outside tube circumferential disc in the annular space between inner core and the urceolus, coil end passes iron core and stretches outside iron core, and described inner core, urceolus and end cap constitute by the banded magnetic material winding up of surface insulation.

Operation principle of the present utility model is the same with existing transformer, when primary coil incoming transport electric current, produces alternating flux in iron core, and this alternating flux produces mutual induced EMF output in secondary coil.The utility model has constituted an omnibearing closed type magnetic circuit by the cylinder shape iron core that is sleeved on coil periphery, transfer the leakage flux of original open closed magnetic circuit to main flux entirely and be used, when improving electromagnetic conversion efficient, also fundamentally avoid interference.According to formula U=4.44fN Φ m=4.44fSN as can be known, under the same conditions, because Φ m increases, therefore will reach same U value, the core area S of this comprehensive closed magnetic circuit formula transformer and the number of turn N of coil can reduce.In other words, adopt identical S and N, the withstand voltage U of the transformer of this version is higher.Cylindrical shell and end cap and the former folded mutually the same reason of silicon steel sheet by banded magnetic material winding up constitutes play the restriction eddy current.

Therefore, according to the above, the utility model is compared with the transformer of the non-comprehensive closed magnetic circuit formula of existing " line bag magnetic " structure, and it is as follows to have advantage:

1. under equal condition of work, make the transformer of same capacity, can reduce core area and therefore can save core material, reduce cost, therefore the core area that contracts can save core material, reduces cost, and reduced volume reduces weight; And core area reduce its magnetic circuit is shortened, magnetic resistance reduces, iron loss reduces, caloric value reduces; Or keep core area constant and reduce the number of turn of coil, thus can save the coil material, reduce copper loss:

2. because iron loss and copper loss all can be reduced, so energy conversion rate is big, the efficient height;

3. reducing of caloric value, can reduce greatly on the one hand to its insulating material with and the making requirement of cooling end part, the cost of manufacture of transformer is greatly reduced. and more meaningfully so load capacity and the useful life that also can improve transformer;

4. the comprehensive closed closed magnetic circuit that is enclosed in coil periphery with comprehensive form has been avoided electromagnetic interference, has improved the performance index of transformer;

5. the minimizing of caloric value, can reduce greatly on the one hand to its insulating material with and cooling end part manufacture requirement, the cost of manufacturing of transformer is greatly reduced, can also its caloric value be controlled at low situation by the area of control iron core on the other hand, thereby improve the load capacity and the useful life of transformer;

6. this programme is except that constituting the transformer, and the appropriate location between inside and outside tube and end cap is reserved certain non-magnetic gap and can be constituted reactor;

Provide embodiment below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is a structural representation of the present utility model

Fig. 2 is the vertical view of Fig. 1

Fig. 3 is the structural representation of cylindric iron core

Embodiment

Referring to Fig. 1～2, present embodiment has only provided the coil of transformer and the structural representation between iron core, and existing transformer device structure form is continued to use in partly waiting as cooling of other, so not shown.Iron core by inner core 1, be socketed in the outer urceolus 2 of inner core 1 and the

annular end cap

3,4 of sealing-in on inside and outside tube annular space position, both ends constitutes, described inner core, urceolus and annular end cap are all with the banded magnetic material winding up formation of surface insulation.This band shape magnetic material can adopt existing finish coatings or surface to have the banded silicon steel sheet of layer oxide film, also can select the iron-based non-crystalline band for use.The shape of inner core and urceolus becomes cylindric with winding up is advisable, and the benefit of doing like this is to make magnetic circuit the shortest, also economizes most material.In the annular space 5 between inner core and the urceolus, the

termination

6,7,8,9 of coil can pass and stretches outside iron core coil 10 from the cylindrical shell of iron core or end cap along inside and outside tube circumferential disc.

Claims

1. comprehensive closed magnetic circuit formula transformer, comprise iron core and coil, it is characterized in that described iron core is made of inner core, suit urceolus and the annular end cap that is connected on inner core and the annular space position, urceolus two ends of lid outer tube, described coil along inside and outside tube circumferential disc in the annular space between inner core and the urceolus, coil end passes iron core and stretches outside iron core, and described inner core, urceolus and end cap constitute by the banded magnetic material winding up of surface insulation.

2. comprehensive closed magnetic circuit formula transformer as claimed in claim 1 is characterized in that described inside and outside tube is cylinder.

3. comprehensive closed magnetic circuit formula transformer as claimed in claim 1 is characterized in that described banded magnetic material is a silicon steel sheet.

4. comprehensive closed magnetic circuit formula transformer as claimed in claim 1 is characterized in that described banded magnetic material is the iron-based non-crystalline band.