CN209843461U - High-power inverter transformer with filter inductance function - Google Patents
High-power inverter transformer with filter inductance function Download PDFInfo
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- CN209843461U CN209843461U CN201920961722.1U CN201920961722U CN209843461U CN 209843461 U CN209843461 U CN 209843461U CN 201920961722 U CN201920961722 U CN 201920961722U CN 209843461 U CN209843461 U CN 209843461U
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Abstract
The utility model relates to a high-power inverter transformer with filter inductance function, including the iron core, cup joint a plurality of secondary windings and single primary winding respectively in the iron core post end about the iron core, primary winding is located between the adjacent secondary winding; one leading-out end of each adjacent primary winding is connected in series through a copper tape connector, the other leading-out end of each adjacent primary winding is connected with one end of a first lead, and secondary windings in front of and behind each primary winding are connected with one end of a second lead through leading-out ends. The utility model discloses simple structure, convenient to use, the iron core is formed by the thin slice concatenation of punching, has increased the nimble shape of size, has solved the restriction of original iron core capacity, and the punch hole is convenient for the user installation on the thin slice, need not additionally to add the installing support, practices thrift customer's equipment expense. The leakage inductance value of the transformer is controlled within a certain range by adjusting the gap between the primary winding and the secondary winding, and the requirement of a user is met.
Description
Technical Field
The utility model relates to a transformer field especially relates to a high-power inverter transformer with filter inductance function.
Background
There are two main types of magnetic devices used in high power inverters: 1) high-frequency push-pull transformer 2) is a power frequency transformer with a full-bridge topology structure. In the application occasions where the inverter power supply of motor homes, yachts and the like needs high reliability, the high-frequency transformer is rarely applied due to the reasons of high switching frequency, insufficient reliability of thermal aging and the like, and the use of a power frequency transformer is continued all the time. The conventional industrial frequency transformer is designed and developed according to a linear industrial frequency power transformer, and has the following defects:
the industrial frequency transformer usually adopts silicon steel sheets with fixed sizes such as CD, ED, EI and the like, the power capacity of an iron core is basically limited, and the installation size of a product is limited;
the (II) power frequency transformer generally has lower working frequency, is 50/60Hz conventionally, does not need to consider high-frequency carrier components, and has poorer heat dissipation treatment.
The industrial frequency transformer generally reduces the energy loss, improves the efficiency and reduces the leakage inductance between the primary and the secondary as much as possible. When the industrial frequency transformer is used in an inverter circuit, a filter inductor needs to be additionally added, and the cost is increased.
SUMMERY OF THE UTILITY MODEL
The applicant carries out research and improvement aiming at the existing problems and provides a high-power inverter transformer with a filter inductance function, which can convert unfavorable parameter leakage inductance into useful filter inductance parameters and reduce the cost of a complete machine inverter.
The utility model discloses the technical scheme who adopts as follows:
a high-power inverter transformer with a filter inductance function comprises an iron core, wherein a plurality of secondary windings and a single primary winding are respectively sleeved at the left iron core column end and the right iron core column end of the iron core, and the primary windings are positioned between adjacent secondary windings; one leading-out end of each adjacent primary winding is connected in series through a copper tape connector, the other leading-out end of each adjacent primary winding is connected with one end of a first lead, and secondary windings in front of and behind each primary winding are connected with one end of a second lead through leading-out ends.
The further technical scheme is as follows:
the iron core is a cylindrical iron core formed by overlapping multiple layers of silicon steel sheet groups from bottom to top, adjacent silicon steel sheet groups are arranged in a mutually reverse mode, and at least one layer of fiber cloth is coated on the periphery of the cylindrical iron core;
the silicon steel sheet group is formed by encircling and splicing a pair of first silicon steel sheets and a pair of second silicon steel sheets to form a square shape, the first silicon steel sheets and the second silicon steel sheets are rectangular sheets, and holes are formed in the first silicon steel sheets and the second silicon steel sheets; the length of the first silicon steel sheet is longer than that of the second silicon steel sheet;
the primary winding comprises a framework, second insulating paper and copper strips, wherein the copper strips are wound to form copper strip turns, each copper strip turn is arranged on the framework at intervals from bottom to top, and the second insulating paper is arranged between every two adjacent copper strip turns; a plurality of epoxy battens are respectively padded on two sides of the primary winding, and a first air channel convenient for heat dissipation is formed between the upper and lower adjacent epoxy battens; the pair of first copper strip leading-out ends are reversely folded at the bottom of the primary winding;
the secondary winding comprises a framework and an enameled wire, the enameled wire is wound on the framework, a plurality of epoxy laths are respectively padded on two sides of the secondary winding, and a second air channel convenient for heat dissipation is formed between the upper epoxy lath and the lower epoxy lath which are adjacent; a thermistor is also arranged between the second air channels and is connected with a quick plugging terminal through a lead;
the leading-out end of the secondary winding connected with the second lead and the leading-out end of the primary winding connected with the first lead are coated by the same insulating paper;
the other end of each first lead is connected with the annular terminal, and the other end of each second lead is connected with the wire harness terminal;
the secondary winding and the thermistor also comprise installation bandages which are respectively arranged on the first lead of the primary winding, the second lead of the secondary winding and the lead of the thermistor.
The utility model has the advantages as follows:
the utility model discloses simple structure, convenient to use, the iron core is formed by the thin slice concatenation of punching, has increased the nimble shape of size, has solved the restriction of original iron core capacity, and the punch hole is convenient for the user installation on the thin slice, need not additionally to add the installing support, practices thrift customer's equipment expense. The leakage inductance value of the transformer is controlled within a certain range by adjusting the gap between the primary winding and the secondary winding, so that the requirement of a user is met, the filter inductance of an inverter circuit is replaced by the leakage inductance value, the cost of the user is saved, and the popularization and use value is increased; the coils are distributed on the iron core column of the iron core, and various selections of single winding and multi-winding output are formed by connecting the coils in series and in parallel, so that the use flexibility is increased. The input end and the output end of the inverter transformer are made of conducting wires, the inverter transformer is easy to bend and is flexible, so that the inverter transformer is convenient for clients to install, and the problem of difficulty in installation caused by narrow space is solved.
Drawings
Fig. 1 is an assembly diagram of the present invention.
Fig. 2 is an exploded view of the present invention.
FIG. 3 is a drawing of a single sheet punched from a silicon steel sheet according to the present invention.
Fig. 4 is a splicing view of the silicon steel sheet of the utility model.
Fig. 5 is an internal structure diagram of the primary coil winding of the present invention.
Fig. 6 is an internal structure diagram of the secondary coil winding of the present invention.
Wherein: 1. an iron core; 101. a first copper strip leading-out end; 102. a first air passage; 103. a second air passage; 2. a secondary winding; 201. a welding point; 202. a second copper strip leading-out end; 3. a primary winding; 4. a thermistor; 5. a copper strap connector; 6. a first insulating paper; 7. a first conductive line; 8. a second conductive line; 9. mounting a binding belt; 10. a ring terminal; 11. quickly plugging and unplugging the terminal; 12. an epoxy plank; 13. a framework; 14. a second insulating paper; 15. copper strips; 16. enamelled wires; 17. a wire harness terminal; 18. a first silicon steel sheet; 19. and a second silicon steel sheet.
Detailed Description
The following describes embodiments of the present invention.
As shown in fig. 1 and 2, a high-power inverter transformer with a filter inductance function includes an iron core 1, a plurality of secondary windings 2 and a single primary winding 3 are respectively sleeved at the left and right core column ends of the iron core 1, and the primary winding 3 is located between the adjacent secondary windings 2; one leading-out end of each adjacent primary winding 3 is connected in series through a copper tape connector 5, two ends of each copper tape connector 5 are respectively welded with the second copper tape leading-out end 202, the other leading-out end of each adjacent primary winding 3 is respectively connected with one end of a first lead 7, the other end of each first lead 7 is connected with an annular terminal 10, secondary windings 2 in front of and behind each primary winding 3 are respectively connected with one end of a second lead 8 through leading-out ends, and the other end of each second lead 8 is connected with a wire harness terminal 17.
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the iron core 1 is a cylindrical iron core formed by stacking multiple silicon steel sheet groups from bottom to top, the upper and lower adjacent silicon steel sheet groups are arranged in opposite directions, at least one layer of fiber cloth is coated on the periphery of the cylindrical iron core, the overall strength of the iron core 1 can be enhanced by coating the fiber cloth, and the iron core 1 is impregnated and integrated and has high strength. As shown in fig. 3 and 4, the silicon steel sheet group is formed by enclosing and splicing a pair of first silicon steel sheets 18 and a pair of second silicon steel sheets 19 to form a square shape, the first silicon steel sheets 18 and the second silicon steel sheets 19 are rectangular sheets punched from high magnetic induction and low loss oriented silicon steel sheet raw materials with the thickness of 0.3mm, and holes are formed in the first silicon steel sheets 18 and the second silicon steel sheets 19 for subsequent product installation. The length of the first silicon steel sheets 18 is longer than the length of the second silicon steel sheets 19.
As shown in fig. 1, 3 and 5, the primary winding 3 comprises a framework 13, second insulating paper 14 and copper strips 15, wherein the copper strips 15 are wound to form copper strip turns, the copper strip turns are arranged on the framework 13 at intervals from bottom to top, and the second insulating paper 14 is arranged between adjacent copper strip turns; when the required number of turns of winding is half, a plurality of epoxy laths 12 are respectively padded on two sides of the primary winding 3, and a first air channel 102 convenient for heat dissipation is formed between the upper and lower adjacent epoxy laths 12; a pair of first copper tape leads 101 are folded back at the bottom of the primary winding 3. The epoxy strips 12 can be extended or retracted into the edge of the coil (i.e. the length of the epoxy strips 12 can be greater or less than the width of the coil) as required by the leakage inductance of the inverter transformer, so as to fill the gap between the primary winding 3 and the secondary winding 2. And certain air gaps are reserved on two sides of each copper strip turn and two sides of the insulating paper so as to increase the safe creepage distance. Considering the skin effect of high frequency, in order to further reduce the loss, the copper strip is formed by combining ultrathin multiple layers of copper strips.
As shown in fig. 6, the secondary winding 2 includes a bobbin 13 and an enameled wire 16, the enameled wire 16 is wound on the bobbin 13 to form a plurality of coils, when the winding requires half of the number of turns, a plurality of epoxy strips 12 are respectively padded on two sides of the secondary winding 2 (the epoxy strips 12 are located between the coils), and a second air channel 103 convenient for heat dissipation is formed between the upper and lower adjacent epoxy strips 12; a thermistor 4 is also arranged between the second air channels 103, and the thermistor 4 is connected with a quick plugging terminal 11 through a lead. As shown in fig. 2, in the present embodiment, four independent coils are divided into two groups, the last outgoing line of the previous coil is welded to the start outgoing line of the next coil so that they are connected in series to form an independent secondary winding 2, and the welding point 201 is the welding point of the adjacent coils.
The leading end of the secondary winding 2 connected with the second lead wire 8 and the leading end of the primary winding 3 connected with the first lead wire 7 are covered by the same piece of first insulating paper 6.
The transformer winding device further comprises an installation bandage 9, the installation bandage 9 is respectively arranged on the first lead 7 of the primary winding 3, the second lead 8 of the secondary winding 2 and the lead of the thermistor 4, the arrangement of the installation bandage 9 not only fixes the positions of the leads, but also solves the problems of lead grouping and identification.
The utility model discloses simple structure, convenient to use, the iron core is formed by the thin slice concatenation of punching, has increased the nimble shape of size, has solved the restriction of original iron core capacity, and the punch hole is convenient for the user installation on the thin slice, need not additionally to add the installing support, practices thrift customer's equipment expense. The leakage inductance value of the transformer is controlled within a certain range by adjusting the gap between the primary winding and the secondary winding, so that the requirement of a user is met, the filter inductance of an inverter circuit is replaced by the leakage inductance value, the cost of the user is saved, and the popularization and use value is increased; the coils are distributed on the iron core column of the iron core, and various selections of single winding and multi-winding output are formed by connecting the coils in series and in parallel, so that the use flexibility is increased. The input end and the output end of the inverter transformer are made of conducting wires, the inverter transformer is easy to bend and is flexible, so that the inverter transformer is convenient for clients to install, and the problem of difficulty in installation caused by narrow space is solved.
The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made without departing from the basic structure of the invention.
Claims (8)
1. The utility model provides a high-power inverter transformer with filter inductance function which characterized in that: the transformer comprises an iron core (1), wherein a plurality of secondary windings (2) and a single primary winding (3) are respectively sleeved at the left iron core column end and the right iron core column end of the iron core (1), and the primary windings (3) are positioned between the adjacent secondary windings (2); one leading-out end of each adjacent primary winding (3) is connected in series through a copper tape connector (5), the other leading-out end of each adjacent primary winding (3) is connected with one end of a first wire (7), and the secondary windings (2) in front of and behind each primary winding (3) are connected with one end of a second wire (8) through the leading-out ends.
2. The high-power inverter transformer with the function of filter inductance as claimed in claim 1, wherein: the iron core (1) is a cylindrical iron core formed by overlapping multiple layers of silicon steel sheet groups from bottom to top, adjacent silicon steel sheet groups are arranged in a mutually reverse mode, and the periphery of the cylindrical iron core is at least coated with one layer of fiber cloth.
3. The high-power inverter transformer with the function of filter inductance as claimed in claim 2, wherein: the silicon steel sheet group is formed by encircling and splicing a pair of first silicon steel sheets (18) and a pair of second silicon steel sheets (19) to form a square shape, the first silicon steel sheets (18) and the second silicon steel sheets (19) are rectangular sheets, and holes are formed in the first silicon steel sheets (18) and the second silicon steel sheets (19); the length of the first silicon steel sheet (18) is longer than that of the second silicon steel sheet (19).
4. The high-power inverter transformer with the function of filter inductance as claimed in claim 1, wherein: the primary winding (3) comprises a framework (13), second insulating paper (14) and copper strips (15), wherein the copper strips (15) are wound to form copper strip turns, each copper strip turn is installed on the framework (13) at intervals from bottom to top, and the second insulating paper (14) is installed between every two adjacent copper strip turns; a plurality of epoxy battens (12) are respectively padded on two sides of the primary winding (3), and a first air channel (102) convenient for heat dissipation is formed between the upper and lower adjacent epoxy battens (12); the pair of first copper strip leading-out ends (101) are reversely folded at the bottom of the primary winding (3).
5. The high-power inverter transformer with the function of filter inductance as claimed in claim 1, wherein: the secondary winding (2) comprises a framework (13) and an enameled wire (16), the enameled wire (16) is wound on the framework (13), a plurality of epoxy laths (12) are respectively padded on two sides of the secondary winding (2), and a second air channel (103) convenient for heat dissipation is formed between the upper epoxy lath and the lower epoxy lath (12); and a thermistor (4) is also arranged between the second air channels (103), and the thermistor (4) is connected with a quick plug-in terminal (11) through a lead.
6. The high-power inverter transformer with the function of filter inductance as claimed in claim 1, wherein: the leading-out end of the secondary winding (2) connected with the second lead (8) and the leading-out end of the primary winding (3) connected with the first lead (7) are coated by the same insulating paper (6).
7. The high-power inverter transformer with the function of filter inductance as claimed in claim 1, wherein: the other end of each first wire (7) is connected to the ring terminal (10), and the other end of each second wire (8) is connected to the harness terminal (17).
8. The high-power inverter transformer with the function of filter inductance as claimed in any one of claims 1 to 7, wherein: the winding device further comprises installation ties (9), wherein the installation ties (9) are respectively arranged on the first lead (7) of the primary winding (3), the second lead (8) of the secondary winding (2) and the lead of the thermistor (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920961722.1U CN209843461U (en) | 2019-06-25 | 2019-06-25 | High-power inverter transformer with filter inductance function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920961722.1U CN209843461U (en) | 2019-06-25 | 2019-06-25 | High-power inverter transformer with filter inductance function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209843461U true CN209843461U (en) | 2019-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920961722.1U Active CN209843461U (en) | 2019-06-25 | 2019-06-25 | High-power inverter transformer with filter inductance function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209843461U (en) |
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2019
- 2019-06-25 CN CN201920961722.1U patent/CN209843461U/en active Active
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