CN202930161U - Flat transformer - Google Patents

Flat transformer Download PDF

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Publication number
CN202930161U
CN202930161U CN 201220643906 CN201220643906U CN202930161U CN 202930161 U CN202930161 U CN 202930161U CN 201220643906 CN201220643906 CN 201220643906 CN 201220643906 U CN201220643906 U CN 201220643906U CN 202930161 U CN202930161 U CN 202930161U
Authority
CN
China
Prior art keywords
winding
magnetic core
transformer
flat
flat transformer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220643906
Other languages
Chinese (zh)
Inventor
黄成�
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHENGDU CHENGQI TECHNOLOGY Co Ltd
Original Assignee
CHENGDU CHENGQI TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHENGDU CHENGQI TECHNOLOGY Co Ltd filed Critical CHENGDU CHENGQI TECHNOLOGY Co Ltd
Priority to CN 201220643906 priority Critical patent/CN202930161U/en
Application granted granted Critical
Publication of CN202930161U publication Critical patent/CN202930161U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a flat transformer, comprising two primary windings and a secondary winding, wherein the primary windings and the secondary winding are arranged in magnetic core grooves; the flat transformer is characterized in that magnetic cores include a square upper magnetic core and a square lower magnetic core, and the secondary winding is arranged between the two primary windings; and insulation layers are arranged among the primary windings and the secondary windings. The flat transformer mainly consists of the upper magnetic core, the lower magnetic core, the primary windings and the secondary winding; the number of turns of the primary windings and the secondary winding is less, so that the structure of the flat transformer is simpler, and the automatic assembly is facilitated; and the flat transformer has the advantages of small size, good current distribution, good heat dissipation, high current density and high power density.

Description

A kind of flat transformer
Technical field
The utility model relates to power transformer, is specifically related to a kind of Switching Power Supply flat surface transformer.
Background technology
Transformer is a key element in power supply, and it has high frequency, and the characteristics of low moulding are namely highly very little and operating frequency is very high; Traditional transformer is made of FERRITE CORE and copper coil usually, and is bulky and easily produce electromagnetic interference.
At present, in the middle of the design of flat transformer, utilize independent copper sheet or be molded over copper foil layer in circuit board as secondary side winding, be wherein a circle around the number of turn, if according to existing mode, first side winding and secondary side winding are located at respectively the both sides of transformer, these two secondary side copper sheets can because of inconsistent from the different leakage inductances that cause of distance of first side winding, cause the phenomenon of the current imbalance of front and back half cycle in current cycle.
The utility model content
For above-mentioned deficiency of the prior art, the utility model provides that a kind of volume is little, power density is large, the flat surface transformer that efficient is high.
In order to reach the foregoing invention purpose, the technical solution adopted in the utility model is: a kind of flat surface transformer is provided, it comprises armature winding and the secondary winding that is arranged in the magnetic core groove, described magnetic core comprises square upper magnetic core and lower magnetic core, and described secondary winding is arranged between two armature windings; Be provided with insulating barrier between described armature winding and secondary winding.
According to flat transformer described in the utility model, it is characterized in that: described armature winding is after single flat copper wire spiral winding becomes, to carry out punching press with the secondary winding employing, and it is compared with traditional flat surface transformer, and volume reduces greatly; Adopt single coiling avoided many windings and around and shunt; Electric current distributes in the conductor coideal in transmitting procedure, and AC impedance reduces.
According to flat transformer described in the utility model, it is characterized in that: described armature winding arranges two circle coils; Described secondary winding arranges five circle coils; Coil turn is few, is coupled, and leakage inductance is lower.
According to flat transformer described in the utility model, it is characterized in that: described upper magnetic core and lower magnetic core are of a size of 30mm * 20 mm * 5mm, and after upper magnetic core and lower magnetic core were combined, volume of transformer was little, power can reach 600 watts, and current density is 40A/mm2.
In sum, the beneficial effects of the utility model are:
1, this flat transformer mainly is comprised of upper magnetic core, lower magnetic core, armature winding and secondary winding, makes relatively simple for structurely, is conducive to automation assembling; It is little that it also has a volume, CURRENT DISTRIBUTION, the advantage that thermal diffusivity is good, current density is high and power density is high;
2, the number of turn of armature winding and secondary winding is few, has greatly reduced the volume of Transformer Winding; Compare with traditional transformer, this flat transformer has adopted the flat copper lines, although with collection skin benefit, but electric current is to flow through whole cross-sectional area of conductor to amass, conductor utilizes high, and first winding adopts folder to fold and forms coupling well, and leakage inductance is little, and its can be very fast ON/OFF speed and very low switching loss and reduced leakage inductance, can reach very high efficient.
3, be provided with insulating barrier between armature winding and secondary winding, make withstand voltage greater than 5000V between armature winding and secondary winding, isolation is good.
Description of drawings
Fig. 1 is the vertical view of flat transformer;
Fig. 2 is the left view of flat transformer;
Fig. 3 is the cutaway view along A-A line direction in Fig. 1;
Fig. 4 is the enlarged drawing of B section in Fig. 3;
Fig. 5 is the amplification plan view of armature winding and secondary winding.
Wherein, 1, upper magnetic core; 2, lower magnetic core; 3, armature winding; 4, secondary winding; 5, insulating barrier;
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
As extremely shown in Figure 5 in Fig. 1, this flat surface transformer comprises armature winding 3 and the secondary winding 4 that is arranged in the magnetic core groove, described magnetic core comprises square upper magnetic core 1 and lower magnetic core 2, described secondary winding 4 is arranged between two armature windings 3, make the magnetic core coupling tightr, reduce leakage reactance, be conducive to improve the conversion efficiency of flat transformer under higher frequency; Be provided with insulating barrier 5 between described armature winding 3 and secondary winding 4; What described armature winding 3 and secondary winding 4 adopted is that single flat copper wire spiral winding forms; Described armature winding 3 arranges two circle coils, and described secondary winding 4 arranges five circle coils, and the number of turn of armature winding 3 and secondary winding 4 is few, and hot path is very short, and heat sheds very soon by magnetic core; Described upper magnetic core 1 and lower magnetic core 2 are of a size of 30mm * 20 mm * 5mm.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also carry out some improvement to the utility model, these improvement also fall in the protection range of the utility model claim.

Claims (4)

1. flat transformer, comprise the armature winding (3) and the secondary winding (4) that are arranged in the magnetic core groove, it is characterized in that: described magnetic core comprises square upper magnetic core (1) and lower magnetic core (2), and described secondary winding (4) is arranged between two armature windings (3); Be provided with insulating barrier (5) between described armature winding (3) and secondary winding (4).
2. flat transformer according to claim 1 is characterized in that: what described armature winding (3) and secondary winding (4) adopted is that single flat copper wire spiral winding forms.
, flat transformer according to claim 2, it is characterized in that: described armature winding (3) arranges two circle coils; Described secondary winding (4) arranges five circle coils.
4. the described flat transformer of any one according to claim 1-3, it is characterized in that: described upper magnetic core (1) and lower magnetic core (2) are of a size of 30mm * 20 mm * 5mm.
CN 201220643906 2012-11-29 2012-11-29 Flat transformer Expired - Fee Related CN202930161U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220643906 CN202930161U (en) 2012-11-29 2012-11-29 Flat transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220643906 CN202930161U (en) 2012-11-29 2012-11-29 Flat transformer

Publications (1)

Publication Number Publication Date
CN202930161U true CN202930161U (en) 2013-05-08

Family

ID=48220097

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220643906 Expired - Fee Related CN202930161U (en) 2012-11-29 2012-11-29 Flat transformer

Country Status (1)

Country Link
CN (1) CN202930161U (en)

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130508

Termination date: 20171129

CF01 Termination of patent right due to non-payment of annual fee