CN110808149A - Low-leakage-inductance multistage multi-primary-side multi-secondary-side pulse transformer and winding method thereof - Google Patents
Low-leakage-inductance multistage multi-primary-side multi-secondary-side pulse transformer and winding method thereof Download PDFInfo
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- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2895—Windings disposed upon ring cores
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- 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
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- H—ELECTRICITY
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- 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
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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- H—ELECTRICITY
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- 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
- H01F41/04—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 for manufacturing coils
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Abstract
The invention discloses a low-leakage-inductance multistage multi-primary-side multi-secondary-side pulse transformer and a winding method thereof, and the low-leakage-inductance multistage multi-primary-side multi-secondary-side pulse transformer comprises a plurality of single-group windings, the positive electrodes and the negative electrodes of the secondary sides of the single-group windings are respectively connected in parallel, the single-group windings are uniformly arranged on a transformer iron core to form a transformer unit, the transformer units are sequentially connected in series from top to bottom, a partition plate (7) is arranged between the transformer units of each layer, the positive electrode of the output end of the secondary side of the single-group winding of each layer of the transformer unit is connected with a load, the negative electrode of the output end of the secondary side of the single-group winding of the transformer unit of the lower layer is.
Description
Technical Field
The invention belongs to the technical field of transformers, and particularly relates to a low-leakage-inductance multistage multi-primary-side multi-secondary-side pulse transformer and a winding method thereof.
Background
The pulse transformer has wide application prospect in the charging of the pulse power device, the pulse charging mode has important effects on improving the working reliability of the pulse power device and reducing the size of the device, the load capacity of the pulse transformer is improved, the leading edge of the charging voltage of the secondary high-voltage capacitor is reduced, and the requirement for improving the insulation life of the capacitor is inevitable. The existing pulse charging power supply is large in size, the disadvantage of the pulse charging power supply is obvious compared with the size of a direct-current high-voltage power supply, and the key problem is how to reduce the size of a transformer on the premise of keeping the output power unchanged. In view of the above, it is desirable to design a new winding structure to solve the above problems.
No research has been aimed at this point. The existing four-split transformer can balance the impedance of a winding at a low-voltage side, improve the running reliability of the device, reduce the cost and improve the reliability, but the four-split transformer is mainly applied to a dry-type rectifier transformer, is difficult to improve the insulation level of the transformer, is difficult to apply to a pulse transformer and cannot improve the load capacity of the transformer. There is also a transformer structure in which the leakage inductance of the transformer is reduced and the coupling coefficient is improved by adjusting the interlayer winding, although the load cross adjustment rate can be improved. However, the voltage resistance between the primary and secondary sides cannot be improved, and the method is difficult to apply to the technical field of high-voltage pulse.
Disclosure of Invention
The invention aims to solve the technical problem of providing a multi-stage multi-primary-side multi-secondary-side pulse transformer with low leakage inductance and a winding method thereof, aiming at overcoming the defects in the prior art, namely, the leakage inductance of the transformer is reduced by adopting a multi-primary-side multi-secondary-side mode, the utilization rate of a transformer iron core is improved, the volume of the transformer and the discharge current of each path of primary side are reduced, and meanwhile, the output voltage of each stage is reduced by adopting a multi-stage transformer output series connection mode, so that the front edge of the output voltage of the transformer is reduced, and the load capacity of the transformer is improved.
The invention adopts the following technical scheme:
a multi-stage multi-primary-side multi-secondary-side pulse transformer with low leakage inductance comprises a plurality of single-group windings, wherein the anodes and the cathodes of secondary sides of the single-group windings are respectively connected in parallel, the single-group windings are uniformly arranged on a transformer core to form a transformer unit, the transformer units are sequentially connected in series from top to bottom, a partition plate is arranged between every two layers of transformer units, the anode of the output end of the secondary side of the single-group winding of each layer of transformer unit is connected with a load, the cathode of the output end of the secondary side of the single-group winding of the lower-layer transformer unit is connected with the anode of the output end of the secondary side of the single-group winding of the last-layer transformer unit, and all paths.
Specifically, an insulating shell is arranged outside an iron core of each layer of transformer unit, a plurality of supports are arranged on the insulating shell at intervals, primary windings which are independent of each other are wound inside the insulating shell below each support, the primary windings are connected with an external circuit through leading-out holes in the insulating shell and via holes in an oil tank, secondary windings which are independent of each other are wound above each support, and the secondary windings are connected with secondary windings of other layers of transformer units through partition plates.
Furthermore, the single group of windings comprises a primary winding and a secondary winding, the primary winding is tightly attached to an iron core of the transformer for winding, the secondary winding is wound at the position of the iron core right above the primary winding, and the single primary winding and the single secondary winding form the single group of windings.
Furthermore, one end of the primary side of the single group of windings is connected with the other end of the primary side after sequentially passing through a discharge switch K1 and a capacitor C1; the positive electrodes of the secondary sides of the single group of windings are connected in parallel and then grounded through a secondary side capacitor C, and the negative electrodes of the secondary sides of the single group of windings are connected in parallel and then grounded; one end of each of the primary side loop transformer leakage inductances L1 and the secondary side loop transformer leakage inductances L2 is divided into two paths after passing through the loop stray resistor R1 and the loop stray resistor R2 respectively, one path is connected with one end of the excitation inductance L of the transformer core excitation loop, the other path is connected with one end of the excitation loop stray resistor R, the other ends of the excitation inductance L of the transformer core excitation loop and the excitation loop stray resistor R are grounded, the other end of L1 is grounded through the primary side capacitor C1, and the other end of the loop stray resistor R2 is grounded through the secondary side capacitor C.
Furthermore, the support is of a groove structure, the secondary winding is wound in the groove in a laminated mode, and the insulating shell is provided with leading-out holes for winding at intervals corresponding to the support; an insulating support frame is arranged between the bracket on the outer side of the insulating shell and the lead-out hole.
Furthermore, the number of turns of the secondary winding is more than 1.
The invention is also technically characterized in that the winding method of the low-leakage-inductance multistage multi-primary-side multi-secondary-side pulse transformer comprises the following steps:
s1, winding a layer of insulation paper on the surface of the annular iron core, and then winding primary windings with required number on the surface of the insulation paper;
s2, placing the iron core wound with the primary winding into an insulating shell, leading out two joints of the primary winding from a leading-out hole arranged on the surface of the insulating shell, and then connecting the two joints with an external circuit of the oil tank;
s3, mounting a bracket at a position corresponding to the primary winding outside the insulating shell, and winding the secondary windings with required number in the groove of the bracket;
s4, repeating the steps S1-S3 in the winding mode of each stage of transformer, and connecting the secondary windings of each stage of transformer through the partition boards according to the principle of one-to-one correspondence;
and S5, converging the two ends of each secondary winding respectively, and leading out the output of the two ends to be connected with the required load.
Compared with the prior art, the invention has at least the following beneficial effects:
according to the low-leakage-inductance multistage multi-primary-side multi-secondary-side pulse transformer, the primary side winding and the secondary side winding are isolated by using the insulating shell, so that the insulating capability of the transformer is improved, and the secondary side winding is fixed in position and plays an insulating role due to the arrangement of the insulating support.
Furthermore, the primary windings and the secondary windings are arranged inside and outside in space, so that the space can be saved, the size can be reduced, and the consistency of the number of the primary windings and the secondary windings can be ensured.
Furthermore, a plurality of single-group windings are arranged, the primary windings of the single-group windings are mutually independent, the current value flowing through the primary windings in the single-group windings is reduced, the performance requirement on a switch is lowered, the anodes of the secondary windings are connected in parallel and converged, the output power of the transformer is improved, and in circuit connection, the primary loops and the secondary loops are connected in parallel, so that the total stray inductance and the stray resistance of the loops are reduced, and the output power can be effectively improved.
Furthermore, the insulating support frame is used for integrally supporting the transformer, so that the support of the winding secondary side is prevented from being stressed, the interstage distance is increased, and the insulating capability is improved.
Furthermore, the number of turns of the secondary winding is more than 1, so that the transformation ratio is further improved, and higher output voltage is obtained.
The invention relates to a winding method of a low-leakage-inductance multistage multi-primary-side multi-secondary-side pulse transformer, which is applied to an annular transformer iron core.
In conclusion, the invention can obviously reduce the rise time of the output voltage of the transformer and the leakage inductance value of the transformer, improve the output power of the transformer and further reduce the volume of the transformer.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic diagram of the circuit of a multi-primary-side multi-secondary-side pulse transformer, wherein (a) is a connection diagram and (b) is a schematic diagram of the circuit;
FIG. 2 is an equivalent circuit diagram of a multi-primary-side multi-secondary-side pulse transformer;
FIG. 3 is a schematic diagram of a single-stage winding of a transformer;
FIG. 4 is a schematic diagram of a winding structure;
FIG. 5 is a schematic diagram of the connection between the cascade transformer stages;
FIG. 6 is a schematic diagram of a multi-winding cascade transformer;
fig. 7 is a schematic diagram of a multi-primary-side multi-secondary-side serial transformer structure.
Wherein: 1. a primary winding; 2. a secondary winding; 3. a support; 4. an insulating housing; 5. an exit aperture; 6. an insulating support frame; 7. a partition plate; 8. and (6) a via hole.
Detailed Description
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides a low-leakage-inductance multistage multi-primary-side multi-secondary-side pulse transformer and a winding method thereof, which are used for reducing the leakage inductance value of the primary side and the secondary side of the transformer and improving the output power of the transformer. The transformer has the advantages that the leakage inductance of each path is connected in parallel through the multiple primary sides and the multiple secondary sides, the leakage inductance of the primary side and the secondary side of the transformer is effectively reduced, the utilization rate of the iron core of the transformer is improved, the output power of the transformer is improved, and the transformer has a great application prospect in the design of miniaturization of the transformer. The design of multiple primary sides can also reduce the current of each primary side, and provides convenience for selecting the primary side discharge switch. The invention adopts the multi-stage transformer, can reduce the voltage of each stage of transformer, improve the insulation level of the transformer, and provide convenience for the structural design in the miniaturization design of the transformer.
The invention relates to a low-leakage-inductance multistage multi-primary-side multi-secondary-side pulse transformer which comprises a plurality of single-group windings, wherein the anodes and the cathodes of the secondary sides of the single-group windings are respectively connected in parallel, the single-group windings are uniformly arranged on a transformer iron core to form a transformer unit, the transformer units are sequentially connected in series from top to bottom, a partition plate 7 is arranged between the transformer units of each layer, an insulating shell 4 is arranged outside the transformer iron core of each layer of the transformer unit, supports 3 are uniformly distributed on the insulating shell 4, primary-side windings which are independent mutually are wound below each support 3 and are connected with an external circuit through via holes 8 on an oil tank, secondary-side windings which are independent mutually are wound above each support 3 and are connected with secondary-side windings of other layer units through the partition plate 7; the positive electrode of the output end of the secondary side of the single group of windings of each layer of transformer unit is connected with a load, the negative electrode of the output end of the secondary side of the single group of windings at the lower layer of the transformer unit is connected with the positive electrode of the output end of the secondary side of the single group of windings at the lower layer of the transformer unit, and the negative electrode of the output end of the secondary.
Referring to fig. 1, one end of the primary side of a single group of windings is connected to the other end of the primary side after passing through a discharge switch K1 and a capacitor C1 in sequence; the positive poles of the secondary sides of the single group of windings are connected in parallel and then grounded through a secondary side capacitor C, and the negative poles of the secondary sides of the single group of windings are connected in parallel and then grounded.
The primary capacitors C1, C2, C3 and the like are independent from one another, each primary capacitor is provided with a discharge switch K1, K2, K3 and the like, the number of independent units can be increased continuously, the discharge switch K1 is connected with the positive pole of the primary capacitor C1, the other end of the discharge switch K1 is connected with the same-name end of the primary winding of a single group of windings, the other end of the primary winding is connected to the negative pole of the primary capacitor C1, the same-name end of the secondary winding of each independent primary unit is output and connected to one end of the secondary capacitor C, and the other end of the secondary capacitor C is grounded.
Referring to fig. 2, fig. 2 is an equivalent circuit diagram of fig. 1(b), which includes a plurality of primary side loop transformer leakage inductances L1 and a plurality of secondary side loop transformer leakage inductances L2, wherein one end of L1 and L2 is divided into two paths after passing through a loop stray resistance R1 and a loop stray resistance R2, one path is connected to one end of an excitation inductance L of a transformer core excitation loop, the second path is connected to one end of an excitation loop stray resistance R, the other ends of the excitation inductance L of the transformer core excitation loop and the excitation loop stray resistance R are grounded, the other end of L1 is grounded through a primary side capacitor C1, and the other end of the loop stray resistance R2 is grounded through a secondary side capacitor C.
The transformer leakage inductance of the primary side loop and the secondary side loop which are independent and mutually independent are respectively L1 and L2, R1 and R2 are stray resistance of the loops, L is excitation inductance of the transformer core excitation loop, R is stray resistance of the excitation loop, and the leakage inductance and the stray resistance of the primary side loop and the secondary side loop are in parallel connection, so that the transformer leakage inductance is favorably reduced.
Referring to fig. 3, a group of single-group windings includes a primary winding 1 and a secondary winding 2, the primary winding 1 is wound around an iron core of the transformer, the secondary winding 2 is wound right above the primary winding 1, and the single primary winding 1 and the single secondary winding 2 form a group of single-group windings.
Referring to fig. 4, the winding structure includes a bracket 3 disposed on the iron core, and the bracket 3 is a groove structure for winding a winding; the insulating shell 4 is provided with leading-out holes 5 for winding at intervals corresponding to the bracket 3; and insulating support frames 6 are arranged below the insulating shell 4 at intervals corresponding to the brackets 3.
Referring to fig. 5, a schematic diagram of a multi-level single-group winding circuit is shown, in the multi-level single-group winding, the positive electrode of the output end of the secondary side of the first-level single-group winding is connected to a load, the negative electrode of the output end of the secondary side of the second-level single-group winding is connected to the positive electrode of the output end of the secondary side of the second-level single-group winding, the negative electrode of the output end of the secondary side of the second-level single-group winding is connected to the positive electrode of the output end of the.
The primary capacitors C1, C2, C3 and the like are independent from each other, each primary capacitor is provided with a discharge switch K1, K2, K3 and the like, the number of independent units can be continuously increased, the discharge switch K1 is connected with the positive electrode of the primary capacitor C1, the other end of the discharge switch K1 is connected with the homonymous end of the primary winding of a single group of windings, the other end of the primary winding is connected to the negative electrode of the primary capacitor C1, the homonymous end of the secondary winding of the first stage is connected with one end of the load capacitor, the synonym end of the secondary winding of the second stage is connected with the homonymous end of the third stage and is connected to the last stage, and the synonym end of the last stage is connected to the other end of the load capacitor C.
Referring to fig. 6 and 7, each dotted line in fig. 6(a) is a cell, the single cell is the cell shown in fig. 5, the output anode of each cell is connected to one end of the load, and the output cathode is connected to the other end of the load.
Fig. 6(b) shows that the brackets 3 shown in fig. 4 are uniformly distributed on the iron core, primary windings which are independent of each other are wound below each bracket 3, the primary windings are connected with an external circuit through the through holes 8 shown in fig. 6(c), secondary windings which are independent of each other are wound above the brackets 3, the secondary windings are connected with secondary windings of other stages through the partition plates 7 shown in fig. 6(c), and the secondary windings are connected with the external circuit through the through holes 8 correspondingly arranged on the oil tank.
When the pulse transformer works, the formula of volt-second product is required to be satisfied, namely:
wherein, DeltaBmIs the maximum magnetic induction increment; n is a radical of2The number of turns of the secondary winding; s is the sectional area of the magnetic core.
If the coupling coefficient of the transformer is k, the average magnetic path length of the magnetic core is L, and the leakage inductance is expressed by LsComprises the following steps:
transformer volume formula:
from the formula (2), if LsThe transformer volume can be reduced significantly, and the detailed circuit diagrams refer to fig. 1, fig. 2, and fig. 4.
The invention discloses a winding method of a low-leakage-inductance multistage multi-primary-side multi-secondary-side pulse transformer, which comprises the following steps of:
s1, winding a layer of insulation paper on the surface of the annular iron core, and then winding primary windings with required number on the surface of the insulation paper;
s2, placing the iron core wound with the primary winding into an insulating shell, and leading two joints of the primary winding out of a leading-out hole on the surface of the insulating shell;
s3, mounting a bracket at a position corresponding to the primary side winding outside the insulating shell, and winding the secondary side windings with required number in a bracket groove;
s4, repeating S1-S3 in the winding mode of each stage of transformer, and connecting the secondary windings of each stage of transformer through partition plates according to the principle of one-to-one correspondence;
and S5, converging the two ends of each secondary winding respectively, leading out the two ends to output, and connecting the required load.
The secondary winding output windings penetrate through the insulating plates to be connected. The invention can obviously reduce the rise time of the output voltage of the transformer and the leakage inductance value of the transformer, improve the output power of the transformer and further reduce the volume of the transformer.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1 and 2, fig. 1 shows a single-stage circuit schematic diagram of the present invention, where K (thyristor, IGBT, MOSFET, gas switch.) is a discharge switch of a primary side capacitor, and a secondary side output is connected in parallel to a load capacitor, fig. 2 is an equivalent circuit schematic diagram thereof, and primary side and secondary side equivalent inductors (L1, L2) are in parallel connection, so as to effectively reduce the inductance value of the transformer, thereby increasing the output power of the transformer.
Referring to fig. 3 and 4, the winding schematic diagram shown in fig. 3 shows the arrangement of the windings of the single-stage transformer of the present invention, and the primary and secondary windings of the transformer are uniformly wound and distributed around the annular core of the transformer by selecting an iron core with a suitable size according to the number of windings required. Example 2 shows that the secondary winding is wound in a laminated manner, so that the inner diameter of the transformer can be reduced. Referring to fig. 3(a), a single set of windings includes primary and secondary windings overlaid on the primary winding, and N sets of primary and secondary windings are uniformly distributed around the transformer, see fig. 3 (b).
Referring to fig. 4 and fig. 4, a specific structural diagram is shown, in which the bracket 3 is used for winding a secondary winding N2(N2 > 1), and is made into a groove shape to play a certain insulating role, and a deep groove is convenient for the lamination winding of the secondary winding. The surface of the iron core is used for winding a primary winding after simple insulation treatment, then the iron core is covered by an insulating shell 4 (made of materials such as polyformaldehyde, and the like), a primary winding wire is led out of the shell through a lead-out hole 5 in the surface of the insulating shell 4, and finally the primary winding wire is connected with an external circuit through a through hole 8 correspondingly arranged on an oil tank. And 6 is an insulating support frame for supporting the whole transformer. The selection of N1 and N2 is determined by the desired parameters. Example (c): n1 is 2, N2 is 20, the transformation ratio is 10, and when the load is 200nF and the output voltage is 50kV, the output power can reach 150MW regardless of the saturation.
Example 2
Referring to fig. 5 and 6, fig. 5 shows an example of a single-layer pulse transformer and an n-level series transformer, in which the dotted terminal of the lower-level transformer of each winding is connected to the dotted terminal of the upper-level transformer, so as to achieve the effect of superimposing the output voltages of the n-level transformers.
Each stage of transformer is formed by uniformly arranging N primary and secondary windings, the secondary windings of the adjacent two stages of transformers penetrate through a partition plate 7 to be directly connected, the withstand voltage of each stage of transformer is only 1/N of the total output voltage, a through hole 8 is formed in the wall of the transformer container and used for leading the primary windings out of the container to be connected with an external circuit, and external circuit devices are placed outside the container on the partition plate 7.
And in the case of a three-stage transformer, each stage of transformer has 12 single-group windings, N1 is 2, N2 is 20, the transformation ratio is 10, the load is 200nF, the output voltage is 150kV, and the output power can reach 450MW regardless of saturation.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (7)
1. A multi-stage multi-primary-side multi-secondary-side pulse transformer with low leakage inductance is characterized by comprising a plurality of single-group windings, wherein the anodes and the cathodes of the secondary sides of the single-group windings are respectively connected in parallel, the single-group windings are uniformly arranged on a transformer iron core to form a transformer unit, the transformer units are sequentially connected in series from top to bottom, a partition plate (7) is arranged between every two layers of transformer units, the anode of the output end of the secondary side of the single-group winding of each layer of transformer unit is connected with a load, the cathode of the output end of the secondary side of the single-group winding of the lower layer of transformer unit is connected with the anode of the output end of the secondary side of the single-group winding of the last layer of transformer unit, and.
2. The low leakage inductance multistage multi-primary side multi-secondary side pulse transformer according to claim 1, wherein an insulating shell (4) is arranged outside an iron core of each layer of transformer unit, a plurality of supports (3) are arranged on the insulating shell (4) at intervals, primary side windings which are independent of each other are wound inside the insulating shell below each support (3), the primary side windings are connected with an external circuit through a lead-out hole (5) in the insulating shell (4) and a via hole (8) in an oil tank, secondary side windings which are independent of each other are wound above each support (3), and the secondary side windings are connected with secondary side windings of other layers of transformer units through partition plates (7).
3. The low leakage inductance multi-stage multi-primary side multi-secondary side pulse transformer according to claim 2, wherein the single set of windings comprises a primary side winding (1) and a secondary side winding (2), the primary side winding (1) is tightly wound around an iron core of the transformer, the secondary side winding (2) is wound around the iron core right above the primary side winding (1), and the single primary side winding (1) and the single secondary side winding (2) form a set of single set of windings.
4. The low leakage inductance multi-stage multi-primary side multi-secondary side pulse transformer according to claim 3, wherein one end of the primary side of the single set of windings is connected to the other end of the primary side after passing through a discharge switch K1 and a capacitor C1 in sequence; the positive electrodes of the secondary sides of the single group of windings are connected in parallel and then grounded through a secondary side capacitor C, and the negative electrodes of the secondary sides of the single group of windings are connected in parallel and then grounded; one end of each of the primary side loop transformer leakage inductances L1 and the secondary side loop transformer leakage inductances L2 is divided into two paths after passing through the loop stray resistor R1 and the loop stray resistor R2 respectively, one path is connected with one end of the excitation inductance L of the transformer core excitation loop, the other path is connected with one end of the excitation loop stray resistor R, the other ends of the excitation inductance L of the transformer core excitation loop and the excitation loop stray resistor R are grounded, the other end of L1 is grounded through the primary side capacitor C1, and the other end of the loop stray resistor R2 is grounded through the secondary side capacitor C.
5. The low-leakage-inductance multistage multi-primary-side multi-secondary-side pulse transformer is characterized in that the support (3) is of a groove structure, the secondary-side winding is wound in the groove in a laminated mode, and the insulating shell (4) is provided with lead-out holes (5) for winding at intervals corresponding to the support (3); an insulating support frame (6) is arranged between the bracket (3) and the leading-out hole (5) at the outer side of the insulating shell (4).
6. The low leakage inductance, multi-stage, multi-primary-side, multi-secondary-side pulse transformer of claim 5, wherein the number of secondary windings is > 1.
7. The method for winding a low leakage inductance multi-stage multi-primary multi-secondary pulse transformer according to claim 1, comprising the steps of:
s1, winding a layer of insulation paper on the surface of the annular iron core, and then winding primary windings with required number on the surface of the insulation paper;
s2, placing the iron core wound with the primary winding into an insulating shell, leading out two joints of the primary winding from a leading-out hole arranged on the surface of the insulating shell, and then connecting the two joints with an external circuit of the oil tank;
s3, mounting a bracket at a position corresponding to the primary winding outside the insulating shell, and winding the secondary windings with required number in the groove of the bracket;
s4, repeating the steps S1-S3 in the winding mode of each stage of transformer, and connecting the secondary windings of each stage of transformer through the partition boards according to the principle of one-to-one correspondence;
and S5, converging the two ends of each secondary winding respectively, and leading out the output of the two ends to be connected with the required load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910964957.0A CN110808149B (en) | 2019-10-11 | 2019-10-11 | Low-leakage-inductance multistage multi-primary-side multi-secondary-side pulse transformer and winding method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910964957.0A CN110808149B (en) | 2019-10-11 | 2019-10-11 | Low-leakage-inductance multistage multi-primary-side multi-secondary-side pulse transformer and winding method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110808149A true CN110808149A (en) | 2020-02-18 |
| CN110808149B CN110808149B (en) | 2022-02-22 |
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Cited By (1)
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| CN114039495A (en) * | 2021-10-27 | 2022-02-11 | 中国航空制造技术研究院 | Low leakage inductance boosting power transformer for electron beam high-voltage acceleration power supply |
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| CN114039495A (en) * | 2021-10-27 | 2022-02-11 | 中国航空制造技术研究院 | Low leakage inductance boosting power transformer for electron beam high-voltage acceleration power supply |
| CN114039495B (en) * | 2021-10-27 | 2024-04-09 | 中国航空制造技术研究院 | Low leakage inductance boost power transformer for electron beam high-voltage accelerating power supply |
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| CN110808149B (en) | 2022-02-22 |
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