CN202796401U - High frequency switching power supply transformer - Google Patents
High frequency switching power supply transformer Download PDFInfo
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- CN202796401U CN202796401U CN 201220435583 CN201220435583U CN202796401U CN 202796401 U CN202796401 U CN 202796401U CN 201220435583 CN201220435583 CN 201220435583 CN 201220435583 U CN201220435583 U CN 201220435583U CN 202796401 U CN202796401 U CN 202796401U
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- power supply
- magnetic core
- switching power
- frequency
- transformer
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Abstract
The utility model discloses a high frequency switching power supply transformer, which can enable the working frequency of a switching power supply to be greatly improved, so that the size of a pulse transformer and the size of the switching power supply are reduced, and the working efficiency of the switching power supply is correspondingly improved. The high frequency switching power supply transformer comprises at least two windings and a magnetic core, wherein each winding is formed by coiling a plurality of enamelled copper wires; and the windings are coiled on the magnetic core in parallel, and the magnetic core is a high frequency annular magnetic core.
Description
Technical field
The utility model relates to a kind of transformer, relates in particular to a kind of pulse transformer for high frequency switch power.
Background technology
In the new-energy automobile field of development, Switching Power Supply is little with its power consumption, efficient is high, volume is little, lightweight etc., and plurality of advantages is waited until extensive use.But in traditional Switching Power Supply design, owing to be subjected to the factor affecting such as leakage field, leakage inductance and magnetic material, the operating frequency of Switching Power Supply is generally between 5KHz-100KHz, cause the volume of switch transformer still larger, inconvenience is installed, causes that because switching frequency is low power work efficient also decreases simultaneously.Therefore, further improve the operating frequency of Switching Power Supply, to reduce the volume of switch transformer, it is very necessary improving the Switching Power Supply operating efficiency.
Open day be that on 08 18th, 2004, publication number are that the patent documentation of CN 2634613Y discloses a kind of technical scheme, name is called a kind of pulse transformer, adopt CD shape strip iron core, between two iron cores, be provided with air-gap, and be respectively arranged with a left coil and a right coil at two iron cores, removed the magnetic bias compensating circuit, therefore solved the bias diode damage problem that spark phenomenon causes, and CD shape iron core can adopt mechanization row around mode production efficiency significantly to be improved.But this technical scheme can not solve the problem that improves the Switching Power Supply operating frequency, reduces the Switching Power Supply volume.
Summary of the invention
The utility model main purpose is to provide a kind of high-frequency switching mode power supply transformer, and the Switching Power Supply operating frequency is significantly improved, thereby has reduced pulse transformer volume and Switching Power Supply volume, has also correspondingly improved the operating efficiency of Switching Power Supply.
The utility model is mainly solved by following technical proposals for the prior art problem, and a kind of high-frequency switch power transformer comprises at least two windings and magnetic core, and each winding adopts many enamel covered wire coilings; All windings and on magnetic core, this magnetic core is the high-frequency ring magnetic core.Each winding adopt strand copper wire and together around, rather than adopt single thick copper lines around, effectively overcome the kelvin effect of high-frequency current, use 3-5 root thin wire (enamel covered wire) to replace intrinsic heavy gauge wire (enamel covered wire) during coiling, so not only improved conductor efficiency, and made electric current more unobstructed; With primary and secondary winding altogether and around, make primary and secondary wire spacing minimum, can make high frequency leakage inductance and distributed capacitance reduce to minimum value, guarantee the steady operation of high-frequency switch circuit.Although the primary and secondary winding and around after reduced withstand voltage between line, can satisfy the DC-DC power conversion demand of automobile circuit fully; Adopt the high-frequency ring magnetic core, effectively improved magnetic permeability, reduced leakage field and loss.Thereby also improved the operating efficiency of Switching Power Supply.
Above-mentioned switching mode power supply transformer structure can significantly improve the Switching Power Supply operating frequency, thereby the transformer coil number of turn is reduced, and capacitor volume, inductor volume also can reduce, and therefore, have reduced switching mode power supply transformer volume, Switching Power Supply volume.
As preferably, the high-frequency ring magnetic core is cobalt base amorphous toroidal core.This magnetic core can guarantee that switching mode power supply transformer is operated in the 300KHz scope.
As preferably, high-frequency switch power transformer is the single-end flyback switching power supply transformer, is provided with the space air gap at described high-frequency ring magnetic core.Single-end flyback switching power supply is the most widely Switching Power Supply structure of purposes simple in structure, because it is operated in the unidirectional pulse state, the unidirectional excitation of transformer magnetic core, magnetic core is saturated easily, therefore be provided with suitable space air gap at toroidal core, both ensure enough magnetic flux densities, be unlikely to again to occur magnetic saturation.Under the high switching frequency, make the output voltage of single-end flyback switching power supply more stable.
As preferably, in each winding, again coiling after many enamel covered wires are stranded.
As preferably, the winding enamel covered wire is high temperature resistant enamel covered wire.
The beneficial effect that the utility model brings is because switching mode power supply transformer can be operated on the higher switching frequency, not only to have reduced the pulse transformer volume, also the volume of capacitor, inductor has been reduced greatly; Owing to reduced leakage field, leakage inductance and kelvin effect from structure, the Switching Power Supply operating efficiency is effectively improved, reduced energy loss.
Description of drawings
Fig. 1 is a kind of principle schematic of the present utility model;
Fig. 2 is a kind of switching power circuit figure that uses this switch power supply depressor.
Among the figure: the 1st, high-frequency ring magnetic core, the 2nd, space air gap, the 3rd, armature winding, the 4th, secondary winding.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is further described in detail.
Embodiment: as shown in Figure 1, a kind of high-frequency switch power transformer of the present utility model, armature winding 3 and secondary winding 4 and on high-frequency ring magnetic core 1.Wherein: armature winding 3 adopts 4 stranded rear coilings of enamel covered wire, and secondary winding 4 adopts 3 stranded rear coilings of enamel covered wire; High-frequency ring magnetic core 1 is cobalt base amorphous toroidal core, and space air gap 2 is set on it.
Figure 2 shows that a kind of switching power circuit schematic diagram that uses this switch power supply depressor, this Switching Power Supply is the single-ended flyback high frequency switch power.Design parameter is take the new energy electric motor vehicle inverter as example, the high frequency switch power design power is about 30W, select the cobalt base amorphous toroidal core of WWL type unipolar pulse, power mode is the discontinuous current pattern, and armature winding T1 and secondary winding T2, T3, T4 are together and on cobalt base amorphous toroidal core.
The PWM controller adopts UC2843 chip, Ct=0.1
, Rt=9.1K calculates Switching Power Supply operating frequency f=197KHz by f=1.8/Rt*Ct.
Switching mode power supply transformer T major parameter:
By f=197KHz, pulse period T ≈ 5*10^-6s then, switching tube ON time Ton=0.5T=2.5*10^-6s;
It is 1.53A that the T2 winding needs output current;
It is 1A that the T3 winding needs output current;
It is 0.2A that the T3 winding needs output current;
The power taking source efficiency is 75%;
Then the electric current of armature winding T1 is 2.1A;
Estimating the armature winding T1 number of turn by magnetic core size and structure is 8 circles, and the T2 number of turn is 10 circles, and the T3 number of turn is 4 circles, and the T4 number of turn is 10 circles, and sectional area of wire is with being taken as 0.785mm2.
Armature winding is selected the stranded rear coiling of 4 high temperature resistant enamel covered wires of sectional area 0.2043 mm2, and secondary winding T2, T3 and T4 select the stranded rear coiling of 3 high temperature resistant enamel covered wires of sectional area 0.2617 mm2; T1, T2, T3 and T4 and around the WWL type unipolar pulse of selecting with on the cobalt base amorphous toroidal core.
So the utlity model has following characteristics: can significantly improve the Switching Power Supply operating frequency, thereby the transformer coil number of turn is reduced, capacitor volume, inductor volume also all reduce thereupon, therefore reduce switching mode power supply transformer volume, Switching Power Supply volume, also improved the operating efficiency of Switching Power Supply.
Claims (5)
1. a high-frequency switch power transformer is characterized in that: comprise two windings and magnetic core, many enamel covered wire coilings of each winding employing at least; All windings and on described magnetic core, described magnetic core is the high-frequency ring magnetic core.
2. described a kind of high-frequency switch power transformer according to claim 1, it is characterized in that: described high-frequency ring magnetic core is cobalt base amorphous toroidal core.
3. described a kind of high-frequency switch power transformer according to claim 1 and 2, it is characterized in that: described high-frequency switch power transformer is the single-end flyback switching power supply transformer, is provided with the space air gap at described high-frequency ring magnetic core.
4. described a kind of high-frequency switch power transformer according to claim 1 is characterized in that: in each winding, and again coiling after described many enamel covered wires are stranded.
5. according to claim 1 or 4 described a kind of high-frequency switch power transformers, it is characterized in that: described enamel covered wire is high temperature resistant enamel covered wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220435583 CN202796401U (en) | 2012-08-30 | 2012-08-30 | High frequency switching power supply transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220435583 CN202796401U (en) | 2012-08-30 | 2012-08-30 | High frequency switching power supply transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202796401U true CN202796401U (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220435583 Expired - Fee Related CN202796401U (en) | 2012-08-30 | 2012-08-30 | High frequency switching power supply transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN202796401U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426611A (en) * | 2013-09-05 | 2013-12-04 | 东莞铭普光磁股份有限公司 | Communication transformer and winding method of winding set thereof |
| CN113257530A (en) * | 2021-03-26 | 2021-08-13 | 王艺霏 | Circular magnetic stripe magnetic conduction transformer |
-
2012
- 2012-08-30 CN CN 201220435583 patent/CN202796401U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426611A (en) * | 2013-09-05 | 2013-12-04 | 东莞铭普光磁股份有限公司 | Communication transformer and winding method of winding set thereof |
| CN113257530A (en) * | 2021-03-26 | 2021-08-13 | 王艺霏 | Circular magnetic stripe magnetic conduction transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20200830 |