CN209401461U - A kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply - Google Patents

A kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply Download PDF

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Publication number
CN209401461U
CN209401461U CN201920354833.6U CN201920354833U CN209401461U CN 209401461 U CN209401461 U CN 209401461U CN 201920354833 U CN201920354833 U CN 201920354833U CN 209401461 U CN209401461 U CN 209401461U
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coil
primary coil
primary
power supply
frequency
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张征熊
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Anhui Heng Fu Electronic Technology Co Ltd
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Anhui Heng Fu Electronic Technology Co Ltd
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Abstract

The utility model discloses a kind of transformer winding structures of high-frequency and high-voltage photo-voltaic power supply, including the internal skeleton for being embedded with magnetic core, the outside of the skeleton is successively wound with first part's primary coil, the first secondary coil, the first shielded coil, second part primary coil, second subprime coil, Part III primary coil, third secondary coil, Part IV primary coil, secondary shielding coil, ancillary coil and Part V primary coil from inside to outside.The transformer winding structure of the utility model high-frequency and high-voltage photo-voltaic power supply is that H-type point column shield folded and winding process, leakage inductance can be effectively reduced, the magnetic circuit for more preferably magnetic flux being allowed to constitute in FERRITE CORE, allows multiple coils to generate more magnetic fields, and the magnetic conductivity of ferrite core material keeps stable state;Reduction leaks into air, forms closed magnetic circuit in air.The increase of shielded layer is effectively reduced the turn-to-turn capacitance between Multiple coil, reduces influence of the electromagnetic interference to power supply.

Description

A kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply
Technical field
The utility model belongs to transformer technology field, in particular to a kind of transformer winding of high-frequency and high-voltage photo-voltaic power supply Structure.
Background technique
Solar power generation is a kind of green energy resource with the fastest developing speed.In solar photovoltaic generation system, photovoltaic electric The characteristic in pond is larger with the amplitude that intensity of illumination changes, so the control power supply of system inverter should have a wide range of DC voltage Steady operation ability under situation of change should have a comparatively wide operating voltage range, very weak in sunray in this way In the case where still ensure that the normal work of inverter control system.Photovoltaic inversion electricity generation system accessory power supply, utilizes solar energy Battery power supply is the power supply such as solar energy power generating control system, drive system and various sample circuits.In photovoltaic generating system In, input photovoltaic cell voltage is 300~1600VDC, exports burning voltage after accessory power supply converts, is supplied to each inversion Control system.
Photovoltaic inversion accessory power supply mostly uses greatly the form of reverse exciting topological, and comparatively wide input voltage range is to power supply Reliability design require it is very high, the key factor of flyback power supply converter design first is that the design of transformer.It is traditional around Integrity problem of the structure design processed in leakage inductance, safety and power consumption is larger.
Utility model content
The utility model the above-mentioned prior art there are aiming at the problem that, a kind of transformation of high-frequency and high-voltage photo-voltaic power supply is provided Device winding structure.
The utility model is realized by following technological means solves above-mentioned technical problem:
A kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply, including the internal skeleton for being embedded with magnetic core, the skeleton Outside be wound with primary coil group, secondary coil group, shield coil set and ancillary coil, the primary coil includes first part Primary coil, second part primary coil, Part III primary coil, Part IV primary coil and Part V primary line Circle, the secondary coil group include the first secondary coil, second subprime coil and third secondary coil, the shield coil set packet Include the first shielded coil and secondary shielding coil, first part's primary coil, the first secondary coil, the first shielded coil, Second part primary coil, second subprime coil, Part III primary coil, third secondary coil, Part IV primary coil, Secondary shielding coil, ancillary coil and Part V primary coil are successively wound on the outside of skeleton from inside to outside.
The primary coil group, secondary coil group, shield coil set and auxiliary as a further improvement of the utility model, Coil is three layer insulation wire.
Primary coil group, secondary coil group and ancillary coil are the double-deck coiling as a further improvement of the utility model, The shield coil set is single layer coiling.
First part's primary coil, second part primary coil, third as a further improvement of the utility model, Part primary coil, Part IV primary coil and Part V primary coil account for 1/5th of primary coil group.
The secondary coil group not tuck foot as a further improvement of the utility model,.
Shield coil set access cathode dead point as a further improvement of the utility model,.
First part's primary coil, the first secondary coil, the first shielding as a further improvement of the utility model, Coil, second part primary coil, second subprime coil, Part III primary coil, third secondary coil, Part IV are primary Coil, secondary shielding coil, ancillary coil and Part V primary coil outside be wound with insulating tape.
The magnetic core is any one of ETD or EER magnetic core as a further improvement of the utility model,.
The utility model has the following beneficial effects: the transformer winding structure of the utility model high-frequency and high-voltage photo-voltaic power supply is H Type point column shielding is folded and winding process, can effectively reduce leakage inductance, the magnetic circuit for more preferably allowing magnetic flux to constitute in FERRITE CORE allows multiple Coil generates more magnetic fields, and the magnetic conductivity of ferrite core material keeps stable state;Reduction leaks into air, in air Form closed magnetic circuit.The increase of shielded layer is effectively reduced the turn-to-turn capacitance between Multiple coil, reduces electromagnetic interference to power supply Influence.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model;
Fig. 2 is the detailed description figure of transformer coil winding in embodiment.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to The range of the utility model protection.
Embodiment
As shown in Figure 1, a kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply, including the internal skeleton for being embedded with magnetic core 10, the outside of the skeleton 10 is wound with primary coil group, secondary coil group, shield coil set and ancillary coil 50, the primary Coil includes first part's primary coil 21, second part primary coil 22, Part III primary coil 23, Part IV primary Coil 24 and Part V primary coil 25, the secondary coil group include the first secondary coil 31,32 and of second subprime coil Third secondary coil 33, the shield coil set include the first shielded coil 41 and secondary shielding coil 42, the first part Primary coil 21, the first secondary coil 31, the first shielded coil 41, second part primary coil 22, second subprime coil 32, Three parts primary coil 23, third secondary coil 33, Part IV primary coil 24, secondary shielding coil 42, ancillary coil 50 Successively it is wound on the outside of skeleton 10 from inside to outside with Part V primary coil 25.
Leakage inductance is that a part of magnetic flux that transformer primary and secondary is missed during coupling.The leakage inductance of flyback transformer is answered This is that the magnetic line of force caused by coil cannot all pass through secondary coil, therefore the inductance for generating leakage field is known as leakage inductance.The production of leakage inductance Life is to be coupled to secondary (primary) due to certain primary (secondary) magnetic fluxs not over magnetic core, but returned to by air closure Primary (secondary).The conductivity of electromagnetic wire is about 109 times of air conductivity, and the ferrite core material of transformer 104 times of magnetic conductivity only about air permeability.Therefore magnetic flux just has in the magnetic circuit being made up of FERRITE CORE A part leaks into air, forms closed magnetic circuit in air, to generate leakage field.And with the raising of working frequency, made The magnetic conductivity of ferrite core material can reduce.Therefore in high-frequency and high-voltage, this phenomenon is become apparent.Leakage inductance is One important indicator of flyback transformer, for comparatively wide operating voltage input range Switching Power Supply performance indicator and reliability Very big, the presence of leakage inductance is influenced, counter electromotive force can be generated when switching device cut-off moment, be easy switching device over-voltage breakdown, The loss that also will increase primary buffer circuit generates unnecessary power consumption.
The transformer winding structure of the utility model high-frequency and high-voltage photo-voltaic power supply is that H-type point column shield folded and winding process, can To effectively reduce leakage inductance, the magnetic circuit for more preferably allowing magnetic flux to constitute in FERRITE CORE allows multiple coils to generate more magnetic fields, iron oxygen The magnetic conductivity of body core material keeps stable state.Reduction leaks into air, forms closed magnetic circuit in air.The increasing of shielded layer Add the turn-to-turn capacitance between being effectively reduced Multiple coil, reduces influence of the electromagnetic interference to power supply.
Further, the primary coil group, secondary coil group, shield coil set and ancillary coil 50 are three-layer insulated Line.The safety requirements of photovoltaic high-tension transformer need to meet the standard of UL1741, therefore usually primary and secondary, traditional transformer logical The space of electricity is climbed in the gap Chang Liuyou 8mm, 15mm, and dielectric strength reaches 4000VAC.Make transformer using 3 layers of insulation cable architecture Volume can be made small, because winding can use the full width of skeleton, biggish winding area, edge does not need to leave a blank Gap.
Further, primary coil group, secondary coil group and ancillary coil 50 are the double-deck coiling, and the shield coil set is Single layer coiling.Shielded coil is used to reduce the turn-to-turn capacitance between Multiple coil, and single layer can be realized, and the number of plies excessively will affect whole Coiling volume, primary coil group, secondary coil group and ancillary coil 50 are that the double-deck coiling more preferably allows magnetic flux in FERRITE CORE structure At magnetic circuit, reduce leakage inductance.
Further, first part's primary coil 21, second part primary coil 22, Part III primary coil 23, Part IV primary coil 24 and Part V primary coil 25 account for 1/5th of primary coil group.Guarantee each portion The consistency for the coupling circuit divided, to improve the stability of closed magnetic circuit.
Further, the secondary coil group not tuck foot.Ensure the spacing of maximum primary coil group Yu secondary coil group It is required that meeting the standard requirements of UL1741.
Further, shield coil set access cathode dead point.Reduce influence of the electromagnetic interference to power supply.
Further, first part's primary coil 21, the first secondary coil 31, the first shielded coil 41, second Divide primary coil 22, second subprime coil 32, Part III primary coil 23, third secondary coil 33, Part IV primary line The outside for enclosing 24, secondary shielding coil 42, ancillary coil 50 and Part V primary coil 25 is wound with insulating tape 60, uses In the adjacent coil windings of isolation.
Further, the magnetic core is any one of ETD or EER magnetic core.ETD or EER magnetic core has biggish winding region Domain, newel, which opens air gap magnetic core, can be further reduced leakage inductance, and there have for the reliability of high frequency high voltage electronic transformer to be bigger good Place.
In the present embodiment, the design parameter of model HF80W-SDW-27K photovoltaic inversion flyback transformer is as follows: Vin= 300VDC-1600VDC, Vo=29V, Io=3A, magnetic core EER4243Fsw=30KHZ.Folded and coiling is shielded using H-type point column Method, coil windings from inside to outside are successively: N1 first part primary coil 21, the first secondary coil of N2 31, N3 first are shielded Coil 41, N4 second part primary coil 22, N5 second subprime coil 32, N6 Part III primary coil 23, N7 third are secondary Coil 33, N8 Part IV primary coil 24, N9 secondary shielding coil 42, N10 ancillary coil 50 and N11 Part V primary line Circle 25, is detailed in Fig. 2
It should be noted that, in this document, such as first and second or the like relational terms are used merely to one if it exists A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that There is also other identical elements in the process, method, article or apparatus that includes the element.
Above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations;Although referring to aforementioned reality Example is applied the utility model is described in detail, those skilled in the art should understand that: it still can be to preceding Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features;And these It modifies or replaces, the spirit and model of various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution It encloses.

Claims (8)

1. a kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply, including the internal skeleton (10) for being embedded with magnetic core, feature It is, the outside of the skeleton (10) is wound with primary coil group, secondary coil group, shield coil set and ancillary coil (50), institute State primary coil include first part's primary coil (21), second part primary coil (22), Part III primary coil (23), Part IV primary coil (24) and Part V primary coil (25), the secondary coil group include the first secondary coil (31), second subprime coil (32) and third secondary coil (33), the shield coil set include the first shielded coil (41) and Secondary shielding coil (42), first part's primary coil (21), the first secondary coil (31), the first shielded coil (41), Second part primary coil (22), second subprime coil (32), Part III primary coil (23), third secondary coil (33), Part IV primary coil (24), secondary shielding coil (42), ancillary coil (50) and Part V primary coil (25) are by interior It is successively wound on the outside of skeleton (10) outward.
2. a kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply according to claim 1, which is characterized in that described Primary coil group, secondary coil group, shield coil set and ancillary coil (50) are three layer insulation wire.
3. a kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply according to claim 2, which is characterized in that primary Coil group, secondary coil group and ancillary coil (50) are the double-deck coiling, and the shield coil set is single layer coiling.
4. a kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply according to claim 3, which is characterized in that described First part's primary coil (21), second part primary coil (22), Part III primary coil (23), Part IV primary line Circle (24) and Part V primary coil (25) account for 1/5th of primary coil group.
5. a kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply according to claim 3, which is characterized in that described Secondary coil group not tuck foot.
6. a kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply according to claim 3, which is characterized in that shielding Coil group is with accessing cathode dead point.
7. a kind of transformer winding structure of any high-frequency and high-voltage photo-voltaic power supply, feature according to claim 1~6 It is, first part's primary coil (21), the first secondary coil (31), the first shielded coil (41), second part are primary Coil (22), second subprime coil (32), Part III primary coil (23), third secondary coil (33), Part IV are primary Coil (24), secondary shielding coil (42), ancillary coil (50) and Part V primary coil (25) outside be wound with absolutely Edge adhesive tape (60).
8. a kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply according to claim 1, which is characterized in that described Magnetic core is any one of ETD or EER magnetic core.
CN201920354833.6U 2019-03-18 2019-03-18 A kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply Active CN209401461U (en)

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CN201920354833.6U CN209401461U (en) 2019-03-18 2019-03-18 A kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920354833.6U CN209401461U (en) 2019-03-18 2019-03-18 A kind of transformer winding structure of high-frequency and high-voltage photo-voltaic power supply

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