CN104952604A - Driver transformer resistant to unbalance and LLC resonance circuit composed of same - Google Patents
Driver transformer resistant to unbalance and LLC resonance circuit composed of same Download PDFInfo
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- CN104952604A CN104952604A CN201510359634.0A CN201510359634A CN104952604A CN 104952604 A CN104952604 A CN 104952604A CN 201510359634 A CN201510359634 A CN 201510359634A CN 104952604 A CN104952604 A CN 104952604A
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Abstract
The invention proposes a driver transformer resistant to unbalance and an LLC resonance circuit composed of the driver transformer. The driver transformer comprises an annular magnetic core, a first winding and a second winding, the first winding is evenly and closely wound on part of the annular magnetic core, the second winding is evenly wound on the whole first winding through a double-wire parallel winding mode, the first winding is connected with a color code inductor in parallel, the color code inductor is connected with a capacitor in parallel, and the double-wire parallel winding mode is adopted for the second winding. According to the driver transformer, coupling is enhanced, leakage inductance is reduced, the anti-jamming capability is enhanced, and the situation that two crystal triodes are connected at the same time because of unbalance of a circuit is avoided.
Description
Technical field
The present invention relates to field transformer, refer to a kind of driving transformer of anti-unbalance and the LLC resonant circuit of composition thereof especially.
Background technology
In recent years, user requires more and more higher to LED drive power, and such as, low harmony wave, high PF value, without stroboscopic, volume is little, efficiency is high, cost is low.In order to meet user's requirement, we adopt LLC resonant circuit switching technique, but LLC resonant circuit easily produces magnetic flux imbalance, make in circuit, to there will be a DC bias current, when this DC bias current large to a certain extent time just there will be Flux saturation, magnetic flux can not return to zero, remanent magnetism runs up to and to a certain degree causes iron core cutter, when two switching devices that LLC resonant circuit comprises are in conducting and cut-off transient process respectively, namely when two switching devices are all in half conducting state, be equivalent to two control switchs connect simultaneously, they can cause and produce short circuit to supply voltage, and very large power loss can be produced.In order to reduce the loss that control switch transient process produces, generally in semi-bridge switching voltage regulator circuit, all have a mind to allow the connection of two control switchs and deadline stagger a bit of time, this period of time and so-called " dead band ".LLC resonant circuit has the plurality of advantages such as efficiency is high, noise is little, low harmony wave and is quite subject to the favor of user.But in LLC resonant circuit, there is two switching devices problem that break-make, imbalance and antijamming capability are weak simultaneously.
Summary of the invention
The present invention proposes a kind of driving transformer of anti-unbalance and the LLC resonant circuit of composition thereof, solves existing LLC resonant circuit and there is two switching devices problem that break-make, imbalance and antijamming capability are weak simultaneously.
Technical scheme of the present invention is achieved in that a kind of driving transformer of anti-unbalance, comprise toroidal core, first winding and the second winding, first winding is evenly close around on ring type magnetic core, second winding is evenly around on the first winding, first winding and a colour coding inductance in parallel, colour coding inductance and a Capacitance parallel connection.
Further, the second winding comprises two coilings arranged side by side.
Further, the parameter area of colour coding inductance is 300-1000 μ H.
Further, also comprise the tertiary winding, the tertiary winding is located on the second winding.
A kind of LLC resonant circuit of driving transformer composition of anti-unbalance, comprise driving transformer, driving transformer is provided with 8 pins, first winding comprises two pins, be respectively the 4th pin and the 5th pin, 4th pin and the 5th pin are in parallel with colour coding inductance and electric capacity respectively, second winding comprises four pins, be respectively the first pin, 3rd pin, 6th pin and the 8th pin, first pin and the 8th pin are the pins of one article of coiling, 3rd pin and the 6th pin are the pin of another article of coiling, 6th pin is connected with first crystal triode and the second transistor respectively with the first pin, 8th pin passes through grounding through resistance, 3rd pin is all connected with the emitter of first crystal triode with the 7th pin, first crystal triode and the second transistor and two diodes in parallels, a node is provided with between two diodes, this node is connected with the second pin of driving transformer.
Beneficial effect of the present invention is: the LLC resonant circuit that the present invention proposes a kind of driving transformer and composition thereof, first winding is evenly close around on ring type magnetic core, second winding adopts the method for Double-wire parallel wound to be wound on whole section of the first winding uniformly, this winding strengthens coupling and decreases leakage inductance, strengthen antijamming capability, avoid the conducting simultaneously of two transistors.Adopt the method for colour coding inductance in parallel, the inductance of the first winding is revised and finely tuned, solve the saturation depth driving transistor, and exit saturated speed.Thus ensure that a transistor ends reliably, the reliable conducting of another transistor.By the method for shunt capacitance, coordinate shunt inductance parameter, in order to change the time in " dead band ", strengthen antijamming capability, avoid the conducting simultaneously of two transistors.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit theory schematic diagram of the driving transformer of a kind of anti-unbalance of the present invention;
Fig. 2 is the circuit diagram of the LLC resonant circuit of the driving transformer composition of a kind of anti-unbalance of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, a kind of driving transformer of anti-unbalance, comprise toroidal core, first winding and the second winding, first winding, evenly around on ring type magnetic core, accounts for a part for toroidal core area, and the first winding is main winding, second winding is evenly around on the first winding, and the second winding comprises two coilings arranged side by side.This winding strengthens coupling, decreases leakage inductance, enhances antijamming capability.First winding and a colour coding inductance in parallel, the parameter area of colour coding inductance is 300-1000 μ H, by the parameter adjustment to colour coding inductance, can revise the inductance of the first winding and finely tune, colour coding inductance and a Capacitance parallel connection, thus the time changing " dead band ".In specific implementation process, also comprise the tertiary winding and be located on the second winding.In figure, what N1 represented is the first winding, N2A and N2B represents two coilings of the second winding respectively, and N3 represents the tertiary winding.
In specific implementation process, the first winding and the second winding adopt close-coupled mode, reduce leakage inductance, improve the antijamming capability of driving, reduce loss.First winding, the second winding and the tertiary winding also can adopt copper-in-aluminum enameled wire, reduce wire rod loss, simultaneously also can effective reinforced insulation effect.
As shown in Figure 2, a kind of LLC resonant circuit of driving transformer composition of anti-unbalance, comprise driving transformer, driving transformer is provided with 8 pins, first winding comprises two pins, be respectively the 4th pin and the 5th pin, 4th pin and the 5th pin are in parallel with colour coding inductance and electric capacity respectively, second winding comprises four pins, be respectively the first pin, 3rd pin, 6th pin and the 8th pin, first pin and the 8th pin are the pins of one article of coiling, 3rd pin and the 6th pin are the pin of another article of coiling, 6th pin is connected with first crystal triode and the second transistor respectively with the first pin, first crystal triode and the second transistor are PNP type triode, 8th pin passes through grounding through resistance, 3rd pin is all connected with the emitter of first crystal triode with the 7th pin, first crystal triode and the second transistor and two diodes in parallels, a node is provided with between two diodes, this node is connected with the second pin of driving transformer.
The present invention proposes the LLC resonant circuit of a kind of driving transformer and composition thereof, first winding is evenly close around on ring type magnetic core, two coilings of the second winding adopt the mode of Double-wire parallel wound to be wound on whole section of the first winding uniformly, this winding strengthens coupling and decreases leakage inductance, strengthen antijamming capability, avoid the conducting simultaneously of two transistors.Adopt the method for colour coding inductance in parallel, the inductance of the first winding is revised and finely tuned, solve the saturation depth driving transistor, and exit saturated speed.Thus ensure that a transistor ends reliably, the reliable conducting of another transistor.By the method for shunt capacitance, coordinate shunt inductance parameter, in order to change the time in " dead band ", avoid the conducting simultaneously of two transistors.
These are only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the driving transformer of an anti-unbalance, comprise toroidal core, first winding and the second winding, it is characterized in that: described first winding is evenly close around on described ring type magnetic core, described second winding is evenly around on described first winding, described first winding and a colour coding inductance in parallel, described colour coding inductance and a Capacitance parallel connection.
2. the driving transformer of a kind of anti-unbalance according to claim 1, is characterized in that: described second winding comprises two coilings arranged side by side.
3. the driving transformer of a kind of anti-unbalance according to claim 1, is characterized in that: the parameter area of described colour coding inductance is 300-1000 μ H.
4. the driving transformer of a kind of anti-unbalance according to claim 1, is characterized in that: also comprise the tertiary winding, and the described tertiary winding is located on described second winding.
5. the LLC resonant circuit of the driving transformer composition of a kind of anti-unbalance according to any one of claim 1-4, comprise driving transformer, it is characterized in that: described driving transformer is provided with 8 pins, described first winding comprises two pins, be respectively the 4th pin and the 5th pin, described 4th pin and described 5th pin are in parallel with colour coding inductance and electric capacity respectively, described second winding is provided with two coilings, comprise four pins, be respectively the first pin, 3rd pin, 6th pin and the 8th pin, described first pin and described 8th pin are the pins of one article of coiling, described 3rd pin and described 6th pin are the pin of another article of coiling, described 6th pin is connected with first crystal triode and the second transistor respectively with described first pin, described 8th pin passes through grounding through resistance, described 3rd pin is all connected with the emitter of described first crystal triode with the 7th pin, described first crystal triode and described second transistor and two diodes in parallels, a node is provided with between two diodes, described node is connected with the second pin of described driving transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510359634.0A CN104952604A (en) | 2015-06-24 | 2015-06-24 | Driver transformer resistant to unbalance and LLC resonance circuit composed of same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510359634.0A CN104952604A (en) | 2015-06-24 | 2015-06-24 | Driver transformer resistant to unbalance and LLC resonance circuit composed of same |
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| CN104952604A true CN104952604A (en) | 2015-09-30 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02179282A (en) * | 1988-12-28 | 1990-07-12 | Kyocera Corp | Drive circuit for ultrasonic motor |
| EP0475522A1 (en) * | 1990-09-12 | 1992-03-18 | Koninklijke Philips Electronics N.V. | Transformer |
| CN1175184A (en) * | 1996-08-27 | 1998-03-04 | 松下电工株式会社 | Power source equipment |
| CN102064708A (en) * | 2010-08-13 | 2011-05-18 | 南京博兰得电子科技有限公司 | Current-input parallel resonance direct-current/ direct-current converter and method |
| CN102802324A (en) * | 2012-09-10 | 2012-11-28 | 电子科技大学 | Double-loop driving system |
| CN202839245U (en) * | 2012-07-31 | 2013-03-27 | 东莞市大忠电子有限公司 | A dual-winding parallel-winding transformer |
| CN204792386U (en) * | 2015-06-24 | 2015-11-18 | 广东科谷电源有限公司 | Anti unbalanced driving transformer and LLC resonance circuit who constitutes thereof |
-
2015
- 2015-06-24 CN CN201510359634.0A patent/CN104952604A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02179282A (en) * | 1988-12-28 | 1990-07-12 | Kyocera Corp | Drive circuit for ultrasonic motor |
| EP0475522A1 (en) * | 1990-09-12 | 1992-03-18 | Koninklijke Philips Electronics N.V. | Transformer |
| CN1175184A (en) * | 1996-08-27 | 1998-03-04 | 松下电工株式会社 | Power source equipment |
| CN102064708A (en) * | 2010-08-13 | 2011-05-18 | 南京博兰得电子科技有限公司 | Current-input parallel resonance direct-current/ direct-current converter and method |
| CN202839245U (en) * | 2012-07-31 | 2013-03-27 | 东莞市大忠电子有限公司 | A dual-winding parallel-winding transformer |
| CN102802324A (en) * | 2012-09-10 | 2012-11-28 | 电子科技大学 | Double-loop driving system |
| CN204792386U (en) * | 2015-06-24 | 2015-11-18 | 广东科谷电源有限公司 | Anti unbalanced driving transformer and LLC resonance circuit who constitutes thereof |
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| C06 | Publication | ||
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| CB02 | Change of applicant information |
Address after: 528225 Guangdong, Nanhai District, Shishan science and Technology Industrial Park, the town of science and Technology Industrial Park A District, East Road, No. (plant A) on the third floor Applicant after: GUANGDONG KEGU POWER ELECTRONICS CO., LTD. Address before: 528000, Guangdong City, Foshan Province Nanhai District lion town Shishan science and Technology Industrial Park, A science and technology Avenue, No. 39 East (plant A) on the third floor Applicant before: Guangdong Kegu Power Co., Ltd. |
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| COR | Change of bibliographic data | ||
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| TA01 | Transfer of patent application right |
Effective date of registration: 20170912 Address after: 223001, No. four, No. 30, sun Xu village, Chengdong Town, Chuzhou District, Jiangsu, Huaian Applicant after: Xu Li Address before: 528225 Guangdong, Nanhai District, Shishan science and Technology Industrial Park, the town of science and Technology Industrial Park A District, East Road, No. (plant A) on the third floor Applicant before: Guangdong Kegu Power Electronics Co., Ltd. |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150930 |