CN114823092B - Lightweight transformer, lightweight transformer design method and high-voltage power supply - Google Patents
Lightweight transformer, lightweight transformer design method and high-voltage power supply Download PDFInfo
- Publication number
- CN114823092B CN114823092B CN202210439240.6A CN202210439240A CN114823092B CN 114823092 B CN114823092 B CN 114823092B CN 202210439240 A CN202210439240 A CN 202210439240A CN 114823092 B CN114823092 B CN 114823092B
- Authority
- CN
- China
- Prior art keywords
- magnetic core
- transformer
- magnetic
- core
- lightweight
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004804 winding Methods 0.000 claims abstract description 81
- 239000003990 capacitor Substances 0.000 claims abstract description 26
- 230000003071 parasitic effect Effects 0.000 claims abstract description 14
- 230000010354 integration Effects 0.000 claims abstract description 11
- 230000035699 permeability Effects 0.000 claims description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F2027/408—Association with diode or rectifier
Abstract
The invention is suitable for the field of power electronics, and provides a lightweight transformer, a lightweight transformer design method and a high-voltage power supply, wherein the lightweight transformer comprises: the magnetic core, the magnetic shunt ring-shaped magnetic core, the primary framework, the primary winding, the secondary framework, the secondary winding, the first air gap and the second air gap; the first air gap is positioned on a center column of the magnetic core; the second air gap is positioned at a side column of the magnetic core; the annular magnetic core of the magnetic shunt passes through the magnetic core center pillar, and the distance from the top end of the magnetic core center pillar is the groove width of the primary framework; the primary winding is uniformly wound in the primary framework by using litz wires; the secondary winding is wound within the secondary armature using high voltage insulated wire. The mode of increasing leakage inductance is as follows: the parasitic capacitance existing in the voltage doubling rectifying circuit and the secondary winding of the transformer is utilized, so that all integration of the parallel capacitors is realized, the final purpose of reducing the weight of the converter is achieved, and the light design requirement of the aircraft is met.
Description
Technical Field
The invention belongs to the technical field of power electronics, and particularly relates to a lightweight transformer design method, a lightweight transformer and a high-voltage power supply.
Background
The electric aerodynamic propulsion mode is a novel propulsion mode, and is different from the traditional mechanical motion to generate thrust, wherein the thrust is derived from 'ion wind' generated by high-voltage ionized air, and meanwhile, the aircraft adopting the novel propulsion mode has the characteristic of light weight, so that the aircraft is focused by a vast number of students. The electric-air power propulsion mode depends on a high-voltage power supply with high power density, and a high-voltage transformer is an important component in the high-voltage power supply and influences important parameters of the power density of the circuit.
The transformer turns in the traditional LCC converter are large in ratio, the number of turns of the primary winding is small, the number of turns of the secondary winding is large, the primary leakage inductance value of the transformer cannot completely realize the magnetic integration of the resonant inductance, and the transformer is required to be externally connected with an additional inductor in series for supplementing, so that the weight of the converter is increased, and the lightweight design of an electric-air propulsion type aircraft is not facilitated; and if the parasitic capacitance is designed and utilized, the magnetic integration of the parallel capacitance of the LCC converter is completely realized, the weight of the LCC converter is further reduced, and the lightweight design of the electric-air propulsion type aircraft is facilitated.
Disclosure of Invention
The embodiment of the invention provides a lightweight transformer design method and a lightweight transformer, and aims to solve the problem that the conventional transformer is not beneficial to lightweight design of an aircraft in an electro-aerodynamic propulsion mode.
The embodiment of the invention provides a lightweight transformer, which comprises: the magnetic core, the magnetic shunt ring-shaped magnetic core, the primary framework, the primary winding, the secondary framework, the secondary winding, the first air gap and the second air gap;
the first air gap is positioned on a center column of the magnetic core;
the second air gap is positioned at a side column of the magnetic core;
the first air gap and the second air gap are equal in width;
the annular magnetic core of the magnetic shunt passes through the magnetic core center pillar, and the distance from the top end of the magnetic core center pillar is the groove width of the primary framework;
the magnetic core and the annular magnetic core of the magnetic shunt are the same in material and magnetic permeability;
the primary winding is uniformly wound in the primary framework by using litz wires;
the secondary winding is wound within the secondary armature using high voltage insulated wire.
Preferably, the magnetic core, the primary armature and the secondary armature are of a concentric axis structure.
Preferably, the primary backbone, the secondary backbone and the magnetic shunt toroidal core are of independent construction;
after the magnetic core forms a complete magnetic integrated transformer through the primary framework, the magnetic shunt annular magnetic core and the secondary framework, the magnetic core is fixed into a whole by using an insulating tape.
Preferably, the relative permeability of the magnetic shunt toroidal core is less than or equal to the relative permeability of the magnetic core.
The invention also provides a design method of the lightweight transformer, which is used for designing the lightweight transformer, and the design method comprises the following steps:
designing the thickness of an annular magnetic core of the magnetic shunt to realize transformer leakage inductance as resonance inductance;
and integrating the parallel capacitor by utilizing the parasitic capacitor in the secondary winding of the transformer and the voltage doubling rectifying circuit.
Preferably, the design of the thickness of the toroidal core of the magnetic shunt to realize the leakage inductance of the transformer as the resonance inductance specifically comprises:
according to the required resonance capacitance, the leakage inductance of the transformer with the magnetic shunt ring-shaped magnetic core structure is designed to be equal to the required resonance inductance, and the thickness t of the magnetic shunt ring-shaped magnetic core is designed to be equal to the required resonance inductance sh The solution is obtained by the following formula:
；
wherein a, b are determined by the following formula:
；
；
wherein the magnetic resistance、/>、/>、/>、/>And->The method comprises the following steps:
；
；
；
；
；
；
wherein,resonance inductance required for LCC converter, < >>For each layer of the primary winding, +.>For the number of primary winding layers, ac is the area of the magnetic column of the transformer, < >>Relative permeability of toroidal core for magnetic core or magnetic shunt, +.>Is air permeability>For the first air gap or the second air gap width, +.>For the distance of the core leg to the core center leg, < >>For the width of the magnetic core window>For the thickness of the magnetic core side column->For the thickness of the magnetic core->For the length of the magnetic core side column->For the distance from the annular magnetic core of the magnetic shunt to the upper end of the central column of the magnetic core, < > a->The distance from the annular magnetic core of the magnetic shunt to the lower end of the middle column of the magnetic core is set.
Preferably, the integration of the parallel capacitor by using the parasitic capacitor in the secondary winding of the transformer and the voltage doubling rectifying circuit specifically includes:
calculating the capacitance value of the first equivalent capacitor;
calculating the capacitance value of the second equivalent capacitor through the capacitance value of the first equivalent capacitor;
and calculating the number of layers of the secondary winding of the transformer.
Preferably, the capacitance value of the first equivalent capacitance is determined by the following formula:
；
wherein,the capacitance value of the first equivalent capacitor; />And->Is the capacitance value of the high voltage diode body, +.>For the number of secondary winding turns->Turns for the primary winding;
the capacitance of the second equivalent capacitance is determined by the following formula:
；
wherein,is the capacitance of the second equivalent capacitance, +.>Parallel capacitance required for LCC converter, < >>Parasitic capacitance for the secondary winding of the transformer.
Preferably, the calculating the number of secondary winding layers of the transformer is specifically determined by the following formula:
wherein->；
The specific calculation mode of the parameters is as follows:
；
；
；
，/>；
wherein,for the secondary average winding length +.>Layer number of secondary winding of transformer, < >>Is air dielectric constant>For the relative dielectric constant of the insulating sheath of the secondary winding, +.>For the thickness of the secondary winding insulating sheath->Is the center distance of the copper wire.
The invention also provides a lightweight high-voltage power supply for electro-aerodynamic propulsion, and the high-voltage power supply is provided with the lightweight transformer.
The invention has the beneficial effects that: a lightweight transformer design method and lightweight transformer includes: the magnetic core, the magnetic shunt ring-shaped magnetic core, the primary framework, the primary winding, the secondary framework, the secondary winding, the first air gap and the second air gap; the first air gap is positioned on a center column of the magnetic core; the second air gap is positioned at a side column of the magnetic core; the annular magnetic core of the magnetic shunt passes through the magnetic core center pillar, and the distance from the top end of the magnetic core center pillar is the groove width of the primary framework; the primary winding is uniformly wound in the primary framework by using litz wires; the secondary winding is wound within the secondary armature using high voltage insulated wire. The mode of increasing leakage inductance of the invention is as follows: the leakage inductance is regulated by regulating the coil number and the distance between the primary stages, so that the whole integration of the resonance inductance is realized; the parasitic capacitance existing in the voltage doubling rectifying circuit and the secondary winding of the transformer is utilized, the number of layers of the secondary winding is designed, and the transformer is used for reflecting to the primary to form the required equivalent capacitance, so that all integration of the parallel capacitors is realized, the final purpose of reducing the weight of the transformer is achieved, and the light-weight design requirement of the aircraft is met.
Drawings
Fig. 1 is a schematic cross-sectional view of a lightweight transformer according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a lightweight transformer according to an embodiment of the present invention;
fig. 3 is a schematic size diagram of a lightweight transformer according to an embodiment of the present invention;
FIG. 4 is a diagram of a lightweight transformer according to an embodiment of the present invention;
fig. 5 is an equivalent circuit diagram of a lightweight transformer according to an embodiment of the present invention.
Reference numerals: the magnetic core 1, the magnetic shunt ring-shaped magnetic core 2, the primary framework 3, the primary winding 4, the secondary framework 5, the secondary winding 6, the first air gap 7 and the second air gap 8.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. In the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", and the like, if the connected circuits, modules, units, and the like have electrical or data transferred therebetween.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. Meanwhile, the term used in the present specification includes any and all combinations of the items listed in association.
As shown in fig. 1, a lightweight transformer includes: a magnetic core 1, a magnetic shunt ring-shaped magnetic core 2, a primary framework 3, a primary winding 4, a secondary framework 5, a secondary winding 6, a first air gap 7 and a second air gap 8;
the first air gap 7 is positioned on the center column of the magnetic core 1;
the second air gap 8 is positioned at the side column of the magnetic core 1;
the first air gap 7 and the second air gap 8 are equal in width;
the annular magnetic core 2 of the magnetic shunt passes through the middle column of the magnetic core 1, and the distance from the top end of the middle column of the magnetic core 1 is the slot width of the primary framework 3;
the magnetic core 1 and the annular magnetic core 2 of the magnetic shunt are the same in material and magnetic permeability;
the primary winding 4 is uniformly wound in the primary framework 3 by using litz wires;
the secondary winding 6 is wound inside the secondary armature 5 using high voltage insulated wire.
The invention has the beneficial effects that the leakage inductance is increased by adopting the following modes: the leakage inductance is regulated by regulating the coil number and the distance between the primary stages, so that the whole integration of the resonance inductance is realized; the parasitic capacitance existing in the voltage doubling rectifying circuit and the secondary winding of the transformer is utilized, the number of layers of the secondary winding is designed, and the transformer is used for reflecting to the primary to form the required equivalent capacitance, so that all integration of the parallel capacitors is realized, the final purpose of reducing the weight of the transformer is achieved, and the light-weight design requirement of the aircraft is met.
The first air gap 7 is arranged between the middle posts of the magnetic core 1, the second air gap 8 is arranged on side posts on two sides, and the magnetic core 1, the primary framework 3 and the secondary framework 5 of the transformer are of a concentric shaft structure; the primary framework 3, the secondary framework 5 and the magnetic shunt ring-shaped magnetic core 2 are of independent structures;
after the magnetic core 1 forms a complete magnetic integrated transformer by the primary framework 3, the magnetic shunt ring-shaped magnetic core 2 and the secondary framework 5, the magnetic core is fixed into a whole by using an insulating tape. The relative magnetic permeability of the annular magnetic core 2 of the magnetic shunt is not higher than that of the magnetic core 1;
the primary winding 4 is uniformly wound in the primary framework 3; the secondary winding 6 is wound in the secondary framework 5, the primary winding 4 adopts common litz wire, and the secondary winding 6 adopts polytetrafluoroethylene basic insulation wire.
The lightweight transformer is designed by adopting a lightweight transformer design method, and the design method comprises the following steps:
step S10, designing the thickness of an annular magnetic core of the magnetic shunt to realize that leakage inductance of the transformer is used as resonance inductance;
and S20, integrating the parallel capacitor by utilizing the parasitic capacitor in the secondary winding of the transformer and the voltage doubling rectifying circuit.
In particular, parameters in magnetically integrated transformers are designed. The external dimensions of the single magnetic integrated transformer are shown in fig. 2, wherein step S10 includes:
step S11, designing a transformer with a magnetic shunt annular magnetic core structure to have leakage inductance equal to the required resonance inductance according to the required resonance inductance design of LCC, and solving the thickness of the magnetic shunt annular magnetic core through a formula (1):
；（1）
wherein a, b are determined by the following formula:
;（2）
;（3）
wherein the magnetic resistance、/>、/>、/>、/>And->The method comprises the following steps:
；（4）
；（5）
；（6）
；（7）
；（8）
；（9）
wherein,resonance inductance required for LCC converter, < >>For each layer of the primary winding, +.>For the number of primary winding layers, ac is the area of the magnetic column of the transformer, < >>Relative permeability of toroidal core for magnetic core or magnetic shunt, +.>Is air permeability>For the first air gap or the second air gap width, +.>For the distance of the core leg to the core center leg, < >>For the width of the magnetic core window>For the thickness of the magnetic core side column->For the thickness of the magnetic core->For the length of the magnetic core side column->Annular magnetic core of magnetic shunt to central column of magnetic coreDistance of end>The distance from the annular magnetic core of the magnetic shunt to the lower end of the middle column of the magnetic core is set.
In step S20, the number of secondary winding layers of the transformer is designed according to the required parallel capacitance, and the step S20 can be divided into the following small steps:
step S21, calculating the capacitance value of the first equivalent capacitor;
step S22, calculating the capacitance value of the second equivalent capacitor through the capacitance value of the first equivalent capacitor;
step S23, calculating the number of layers of the secondary winding of the transformer.
The capacitance of the first equivalent capacitance is determined by equation (10):
（10）；
wherein,the capacitance value of the first equivalent capacitor; />And->Is the capacitance value of the high voltage diode body, +.>For the number of secondary winding turns->Is the number of primary winding turns.
Firstly, calculating the parasitic capacitance formed by the reflection of the voltage doubling rectifying circuit to the primary, wherein the value is fixed, and the second equivalent capacitance is obtained by designing the layer number of the secondary winding of the transformer, and the step is to lay down the design of the second equivalent capacitance.
The capacitance value of the second equivalent capacitance is determined by equation (11):
（11）；
wherein,for the primary winding turns->For the number of secondary winding turns->The parallel capacitance required for the LCC converter,parasitic capacitance for the secondary winding of the transformer. The second equivalent capacitance to be designed is calculated through the step, and the second equivalent capacitance is realized through the design of the number of layers of the secondary winding of the transformer.
The number of layers of the secondary winding of the transformer is calculated by adopting a formula (12):
（12）；
wherein,；
the parameters in equation (12) are determined by the following equation:
（13）；
（14）；
（15）；
（16）；
（17）。
wherein,for the number of turns of the primary winding of the transformer, < >>For the number of turns of the secondary winding of the transformer, < >>For the secondary average winding length +.>Layer number of secondary winding of transformer, < >>Is air dielectric constant>For the relative dielectric constant of the insulating sheath of the secondary winding, +.>For the thickness of the secondary winding insulating sheath->Is the center distance of the copper wire.
As shown in fig. 3, the outer dimensions of the magnetic core 1 and the magnetic shunt ring-shaped magnetic core 2 are marked.
As shown in fig. 4, a schematic diagram of the magnetic circuit of the integrated transformer shown in fig. 1 is shown.
As shown in fig. 5, an equivalent circuit of the transformer shown in fig. 1 is shown.
The invention also aims to provide a lightweight high-voltage power supply for electro-aerodynamic propulsion, which aims to realize the lightweight and high power density of the high-voltage power supply; in order to achieve the above purpose, the means adopted are as follows: the main circuit adopts a structure of full-bridge inversion-magnetic integration transformer group-voltage doubling rectification output; the insulating material uses a solidifiable insulating adhesive with lighter weight and insulates in a potting mode; the control uses a feedforward constant power control and arcing suppression circuit.
The lightweight integrated transformer for the electro-aerodynamic propulsion high-voltage power supply has the characteristics of high integration and lightweight, and can integrate LCC resonant inductance and excitation inductance into the transformer, so that the power density of the LCC resonant converter is effectively improved, and the lightweight design of the high-voltage power supply is realized.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A lightweight transformer, the transformer comprising: the magnetic core, the magnetic shunt ring-shaped magnetic core, the primary framework, the primary winding, the secondary framework, the secondary winding, the first air gap and the second air gap;
the first air gap is positioned on a center column of the magnetic core;
the second air gap is positioned at a side column of the magnetic core;
the first air gap and the second air gap are equal in width;
the annular magnetic core of the magnetic shunt passes through the magnetic core center pillar, and the distance from the top end of the magnetic core center pillar is the groove width of the primary framework;
the magnetic core and the annular magnetic core of the magnetic shunt are the same in material and magnetic permeability;
the primary winding is uniformly wound in the primary framework by using litz wires;
the secondary winding is wound in the secondary framework by using high-voltage insulation wires;
the thickness of the annular magnetic core of the magnetic shunt is used for realizing that leakage inductance of the transformer is used as resonance inductance; parasitic capacitance in the secondary winding of the transformer and the voltage doubling rectifying circuit is used for realizing integration of parallel capacitance;
the thickness of the toroidal core of the magnetic shunt is determined by:
according to the required resonance capacitance, the leakage inductance of the transformer with the magnetic shunt ring-shaped magnetic core structure is designed to be equal to the required resonance inductance, and the thickness of the magnetic shunt ring-shaped magnetic core is designed to be equal to the required resonance inductancet sh The solution is obtained by the following formula:
；
wherein a, b are determined by the following formula:
；
；
wherein the magnetic resistance、/>、/>、/>、/>And->The method comprises the following steps:
；
；
；
；
；
；
wherein,resonance inductance required for LCC converter, < >>For each layer of the primary winding, +.>For the number of primary winding layers, ac is the area of the magnetic column of the transformer, < >>Relative permeability of toroidal core for magnetic core or magnetic shunt, +.>Is air permeability>For the first air gap or the second air gap width, +.>For the distance of the core leg to the core center leg, < >>For the width of the magnetic core window>For the thickness of the magnetic core side column->For the thickness of the magnetic core->For the length of the magnetic core side column->For the distance from the annular magnetic core of the magnetic shunt to the upper end of the central column of the magnetic core, < > a->The distance from the annular magnetic core of the magnetic shunt to the lower end of the middle column of the magnetic core is set.
2. The lightweight transformer of claim 1, wherein the core, the primary armature and the secondary armature are of a concentric axis configuration.
3. The lightweight transformer of claim 1, wherein the primary former, the secondary former, and the toroidal core of the magnetic shunt are of independent construction;
after the magnetic core forms a complete magnetic integrated transformer through the primary framework, the magnetic shunt annular magnetic core and the secondary framework, the magnetic core is fixed into a whole by using an insulating tape.
4. A lightweight transformer as claimed in any one of claims 1 to 3 wherein the relative permeability of said toroidal core of said magnetic shunt is less than or equal to the relative permeability of said core.
5. A lightweight transformer design method for designing the lightweight transformer of any one of claims 1 to 4, the design method comprising:
designing the thickness of an annular magnetic core of the magnetic shunt to realize transformer leakage inductance as resonance inductance;
and integrating the parallel capacitor by utilizing the parasitic capacitor in the secondary winding of the transformer and the voltage doubling rectifying circuit.
6. The method for designing a lightweight transformer according to claim 5, wherein the designing the thickness of the toroidal core of the magnetic shunt to achieve the transformer leakage inductance as the resonant inductance comprises:
according to the required resonance capacitance, the leakage inductance of the transformer with the magnetic shunt ring-shaped magnetic core structure is designed to be equal to the required resonance inductance, and the thickness of the magnetic shunt ring-shaped magnetic core is designed to be equal to the required resonance inductancet sh The solution is obtained by the following formula:
；
wherein a, b are determined by the following formula:
；
；
wherein the magnetic resistance、/>、/>、/>、/>And->The method comprises the following steps:
；
；
；
；
；
；
wherein,resonance inductance required for LCC converter, < >>For each layer of the primary winding, +.>For the number of primary winding layers, ac is the area of the magnetic column of the transformer, < >>Relative permeability of toroidal core for magnetic core or magnetic shunt, +.>Is air permeability>For the first air gap or the second air gap width, +.>For the distance of the core leg to the core center leg, < >>For the width of the magnetic core window>For the thickness of the magnetic core side column->For the thickness of the magnetic core->Is magneticCore limb length->For the distance from the annular magnetic core of the magnetic shunt to the upper end of the central column of the magnetic core, < > a->The distance from the annular magnetic core of the magnetic shunt to the lower end of the middle column of the magnetic core is set.
7. The method for designing a lightweight transformer according to claim 5, wherein the integrating parallel capacitors by using parasitic capacitors in the secondary winding of the transformer and the voltage doubler rectifier circuit comprises:
calculating the capacitance value of the first equivalent capacitor;
calculating the capacitance value of the second equivalent capacitor through the capacitance value of the first equivalent capacitor;
and calculating the number of layers of the secondary winding of the transformer.
8. The method of designing a lightweight transformer according to claim 7, wherein the capacitance of the first equivalent capacitor is determined by the following formula:
；
wherein,the capacitance value of the first equivalent capacitor; />And->Is the capacitance value of the high voltage diode body, +.>For the number of secondary winding turns->Turns for the primary winding;
the capacitance of the second equivalent capacitance is determined by the following formula:
；
wherein,is the capacitance of the second equivalent capacitance, +.>Parallel capacitance required for LCC converter, < >>Parasitic capacitance for the secondary winding of the transformer.
9. The method for designing a lightweight transformer according to claim 8, wherein the calculating the number of secondary winding layers of the transformer is specifically determined by the following formula:
wherein->；
The specific calculation mode of the parameters is as follows:
；
；
；
， />；
wherein,for the secondary average winding length +.>Layer number of secondary winding of transformer, < >>Is air dielectric constant>For the relative dielectric constant of the insulating sheath of the secondary winding, +.>For the thickness of the secondary winding insulating sheath->Is the center distance of the copper wire.
10. A lightweight high voltage power supply for electro-aerodynamic propulsion, characterized in that it is provided with a lightweight transformer as claimed in any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210439240.6A CN114823092B (en) | 2022-04-25 | 2022-04-25 | Lightweight transformer, lightweight transformer design method and high-voltage power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210439240.6A CN114823092B (en) | 2022-04-25 | 2022-04-25 | Lightweight transformer, lightweight transformer design method and high-voltage power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114823092A CN114823092A (en) | 2022-07-29 |
| CN114823092B true CN114823092B (en) | 2024-03-12 |
Family
ID=82506957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210439240.6A Active CN114823092B (en) | 2022-04-25 | 2022-04-25 | Lightweight transformer, lightweight transformer design method and high-voltage power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114823092B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947601A (en) * | 2017-12-11 | 2018-04-20 | 湖南工程学院 | A kind of novel high-frequency high-voltage arc strike device |
| CN108666067A (en) * | 2017-11-16 | 2018-10-16 | 湖南工程学院 | A kind of high efficiency integrated form LLC resonance transformers |
| CN209729682U (en) * | 2019-05-10 | 2019-12-03 | 南京吉纳电子科技有限公司 | A kind of controllable leakage inductance LLC resonant power integrated transformer |
| CN110828126A (en) * | 2019-10-14 | 2020-02-21 | 华为技术有限公司 | Planar transformer and active circuit |
| EP3758031A1 (en) * | 2019-06-27 | 2020-12-30 | Valeo Siemens eAutomotive France SAS | Electrical transformer with controlled distribution of leakage inductance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021056004A2 (en) * | 2019-08-05 | 2021-03-25 | Thermo Scientific Portable Analytical Instruments Inc. | Pot core transformer with magnetic shunt |
-
2022
- 2022-04-25 CN CN202210439240.6A patent/CN114823092B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108666067A (en) * | 2017-11-16 | 2018-10-16 | 湖南工程学院 | A kind of high efficiency integrated form LLC resonance transformers |
| CN107947601A (en) * | 2017-12-11 | 2018-04-20 | 湖南工程学院 | A kind of novel high-frequency high-voltage arc strike device |
| CN209729682U (en) * | 2019-05-10 | 2019-12-03 | 南京吉纳电子科技有限公司 | A kind of controllable leakage inductance LLC resonant power integrated transformer |
| EP3758031A1 (en) * | 2019-06-27 | 2020-12-30 | Valeo Siemens eAutomotive France SAS | Electrical transformer with controlled distribution of leakage inductance |
| CN110828126A (en) * | 2019-10-14 | 2020-02-21 | 华为技术有限公司 | Planar transformer and active circuit |
Non-Patent Citations (1)
| Title |
|---|
| Zhenxing Zhao ; Qianming Xu ; Yuxing Dai ; An Luo ; Yandong Chen.《Efficiency optimization design of LLC resonant converter for battery charging》.《 2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA)》.2018,全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114823092A (en) | 2022-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8847719B2 (en) | Transformer with split primary winding | |
| US7256675B2 (en) | Energy transfer apparatus for reducing conductivity electromagnetic interference and manufacturing method thereof | |
| JP5307105B2 (en) | COMPOSITE WINDING ELEMENT AND COMPOSITE WINDING ELEMENT FOR TRANSFORMER, TRANSFORMATION SYSTEM AND NOISE CUT FILTER USING SAME | |
| JP6465361B2 (en) | Thin and high current composite transformer | |
| US20210118607A1 (en) | Winding arrangement for use in magnetic devices | |
| CN110212784B (en) | Passive element integration device for single-phase three-level AC/DC resonant converter | |
| CN110911126A (en) | Planar transformer and power converter | |
| CN110301019B (en) | Transformer and switching power supply | |
| JP2013501369A (en) | Current compensation choke and method of manufacturing current compensation choke | |
| CN114710058A (en) | Resonant inductor and transformer magnetic core integration method suitable for bidirectional resonant converter | |
| JP3144913B2 (en) | Thin transformer and power supply using the same | |
| CN114823092B (en) | Lightweight transformer, lightweight transformer design method and high-voltage power supply | |
| CN211788553U (en) | Planar transformer and power converter | |
| CN202585081U (en) | High-power magnetic integrated transformer for electric vehicle charging machine | |
| Rahman et al. | High-frequency split-bobbin transformer design with adjustable leakage inductance | |
| CN109473263B (en) | High-frequency high-voltage transformer module | |
| Zhao et al. | Design of magnetic integrated transformer for lightweight high voltage power supply to electro-aerodynamic propulsion system | |
| Hakim et al. | Compact Integrated Transformer–Grid Inductor Structure for E-Capless Single-Stage EV Charger | |
| Deng et al. | A passive integration unit for current-feed single-switch resonant converter | |
| JPS5728572A (en) | Dc high voltage generator | |
| CN206250028U (en) | A kind of integrated high frequency transformer of single-phase high-power magnetic | |
| CN114679080A (en) | Light-weight high-voltage power supply for electroaerodynamic propulsion and design method thereof | |
| CN214505217U (en) | Transformer device | |
| WO2024080038A1 (en) | Transistor and electric power supply device | |
| CN212258791U (en) | LLC resonant converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |