CN103035378B - Sandwich type transformer - Google Patents

Abstract

The present invention relates to a sandwich transformer, characterized in that it comprises a plurality of primary windings (1) and a plurality of secondary windings (2), a plurality of first through holes (11) being arranged on the primary windings (1), a plurality of second through holes (21) being arranged on the secondary windings (2), an iron core (3) being inserted between the first through holes (11) and the second through holes (21), the primary windings (1) and the secondary windings (2) being arranged on the iron core (3) in a stacked manner, and the upper and lower ends of the plurality of iron cores (3) being connected by a connecting iron core (4), the transformer adopts a primary and secondary stacking method, effectively saving processing time and improving work efficiency, and the stacking of the plurality of primary and secondary windings is conducive to reducing the leakage inductance of the transformer and improving the transmission efficiency of the transformer.

Description

A sandwich transformer

【Technical field】

The invention relates to a sandwich type transformer.

【Background technique】

A transformer is a device that transforms AC voltage, current and impedance. The transformer is composed of a magnetic core and a coil. The coil has two or more windings. The winding and the magnetic core are collectively called the power transformer body, which is the circuit part that establishes the magnetic field and transmits electric energy. , in principle, the magnetic core is the magnetic circuit that constitutes the transformer, which converts the electrical energy of the primary circuit into magnetic energy, and then converts the magnetic energy into the electrical energy of the secondary circuit. Therefore, the magnetic core is the medium of energy transmission. In terms of structure , The magnetic core is the skeleton of the transformer, and the insulated coils are placed on the magnetic core posts, and they are firmly supported and pressed. The coil has two or more windings, and the winding connected to the power supply is called The primary coil and the remaining windings are called secondary coils.

The winding is divided into input winding and output winding according to the function. The input winding converts electric energy into magnetic field energy, and the output winding converts magnetic energy into electric energy output. Transformation is realized through the different turns of the input winding and the output winding. The performance of the transformer is basically Depends on the winding.

The turns of the two sets of coils of the transformer are N1 and N2 respectively. N1 is the primary and N2 is the secondary. When an AC voltage is applied to the primary coil, an induced electromotive force will be generated at both ends of the secondary coil. When N2>N1, its induction The electromotive force is higher than the voltage applied to the primary, and this transformer is called a step-up transformer: when N2<N1, its induced electromotive force is lower than the primary voltage, and this transformer is called a step-down transformer. The primary-secondary voltage and the number of coil turns have the following relationship: U1/U2=N1/N2 where n is called the voltage ratio (turn ratio), when n<1, then N1>N2, U1>U2, the transformer For the step-down transformer. On the contrary, it is a step-up transformer, and the current ratio I1/I2=N2/N1 electric power P1=P2 Note: The above formula is only valid when the ideal transformer has only one secondary coil. When there are two secondary coils, P1 =P2+P3, U1/N1=U2/N2=U3/N3, the current must use the relational expression of electric power to find, if there are more than one, and so on.

The existing transformers have the following deficiencies:

First, the existing transformer uses a single magnetic circuit, and the manufacturing method is relatively complicated when a larger current output is required;

Its two, existing transformer is not easy to automatic operation.

【Content of invention】

The technical problem to be solved by the present invention is to provide a sandwich transformer in view of the deficiencies in the prior art above. The secondary superposition is beneficial to reduce the leakage inductance of the transformer and improve the transmission efficiency of the transformer.

To achieve the above object, the present invention adopts the following technical solutions:

A sandwich transformer, comprising a plurality of primary windings and a plurality of secondary windings, the primary windings are provided with a plurality of first through holes, the secondary windings are provided with a plurality of second through holes, An iron core is pierced between the first through hole and the second through hole, and the primary winding and the secondary winding are arranged on the iron core in a stacked manner. The ends are connected by connecting iron cores.

As mentioned above, the secondary winding is arranged between two adjacent primary windings up and down, and the primary winding and the secondary winding are evenly arranged on the iron core.

As mentioned above, the primary winding is arranged between two adjacent secondary windings up and down, and the primary winding and the secondary winding are evenly arranged on the iron core.

As described above, the primary winding is composed of a meander winding composed of laminations of meander winding sheets.

As mentioned above the primary winding consists of a coil winding.

As mentioned above, the meandering winding piece includes a plurality of straight strips, and the two ends of the plurality of straight strips are alternately connected by upper arc-shaped connecting strips and lower arc-shaped connecting strips to form curved strips. The upper arc-shaped connecting bar and the two connected straight bars enclose the lower opening for inserting the iron core, and the lower arc-shaped connecting bar and the connected two straight bars enclose the upper opening for inserting the iron core. Opening, an acute angle A is formed between the straight strip and the vertical axis X, the angle range of the acute angle A is 0-15°, and the length L of the straight strip is not less than the upper arc-shaped connecting strip, The chord length S of the lower arc-shaped connecting bar makes the lower opening and the upper opening elongate along the vertical axis X direction.

Welding lugs are provided on the outside on the straight strip as described above.

The acute angle A is 0° as mentioned above.

The secondary winding is constituted by the coil winding as described above.

As mentioned above, there are 4 primary windings, 3 secondary windings, 3 iron cores, and 2 connecting iron cores.

The beneficial effects of the present invention are:

1. The sandwich transformer in the present invention includes a plurality of primary windings and a plurality of secondary windings, a plurality of first through holes are arranged on the primary windings, and a plurality of second through holes are arranged on the secondary windings, and the There is an iron core in the middle of the first through hole and the second through hole, and the primary winding and the secondary winding are arranged on the iron core in a stacked manner, and the upper and lower ends of the multiple iron cores are connected by connecting the iron core. The method of superimposing with the secondary can effectively save processing time and improve work efficiency. The superposition of multiple primary and multiple secondary is beneficial to reduce the leakage inductance of the transformer and improve the transmission efficiency of the transformer.

2. The transformer in the present invention constitutes a vertical stacked structure, which has a good heat dissipation effect and reduces the weight by 30% to 40% compared with the traditional transformer, which is convenient for assembly.

3. Compared with the traditional design, the winding piece of the present invention greatly shortens the length of the winding piece of the transformer, thereby further reducing the volume of the transformer and facilitating the installation and transportation of the transformer.

4. In the present invention, welding lugs are provided on the winding sheets, which facilitates the welding and assembly of the winding sheets, effectively improves product performance, and improves production efficiency.

【Description of drawings】

Fig. 1 is a perspective view of the present invention;

Figure 2 is a perspective view of the primary winding of the present invention;

Figure 3 is a perspective view of the secondary winding of the present invention;

Fig. 4 is a front view of the winding sheet of the present invention.

【Detailed ways】

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Fig. 1 to Fig. 4, a sandwich transformer includes a plurality of primary windings 1 and a plurality of secondary windings 2, and a plurality of first through holes 11 are arranged on the primary winding 1, and the secondary The primary winding 2 is provided with a plurality of second through holes 21, the iron core 3 is pierced between the first through hole 11 and the second through hole 21, the primary winding 1 and the secondary winding 2 It is arranged on the iron core 3 in a stacked manner, and the upper and lower ends of the plurality of iron cores 3 are connected through the connecting iron core 4. The transformer as a whole forms a vertical structure. The transformer of this structure adopts the method of primary and secondary superposition, which is effective Save processing time and improve work efficiency. The superposition of multiple primary and multiple secondary is beneficial to reduce the leakage inductance of the transformer and improve the transmission efficiency of the transformer. Compared with the traditional transformer, the weight is reduced by 30% to 40%, which is convenient for assembly.

As shown in Figure 1, in this embodiment, the secondary winding 2 is arranged between two adjacent primary windings 1 up and down, and the primary winding 1 and the secondary winding 2 are evenly arranged on the On the iron core 3, the transformer of the present invention adopts a sandwich structure, and the primary winding and the secondary winding can be stacked uniformly or non-uniformly, forming a vertical structure as a whole to facilitate heat dissipation.

As another embodiment of the present invention, the primary winding 1 is arranged between two adjacent secondary windings 2 up and down, and the primary winding 1 and the secondary winding 2 are evenly arranged on the iron core 3. The transformer of the present invention adopts a sandwich structure, and the primary winding and the secondary winding can be stacked uniformly or non-uniformly, forming a vertical structure as a whole to facilitate heat dissipation.

As shown in FIG. 2 , in this embodiment, the primary winding 1 is composed of zigzag windings, and the zigzag windings are formed by stacking zigzag winding pieces 10 . The zigzag winding pieces are easy to process and are conducive to improving efficiency.

As another embodiment of the present invention, the primary winding 1 is composed of a coil winding, and the coil winding is easy to obtain materials and realize.

As shown in Fig. 2 and Fig. 4, in this embodiment, the zigzag winding piece 10 includes a plurality of straight bars 101, and the two ends of the plurality of straight bars 101 are connected by an upper arc connecting bar 102 and a lower arc. The strips 103 alternately connect two adjacent straight strips 101 into a curved strip shape, and the upper arc-shaped connecting strip 102 and the connected two straight strips 101 form a lower opening 104 for inserting the iron core. The lower arc-shaped connecting bar 103 and the connected two straight bars 101 encircle the upper opening 105 for inserting the iron core. An acute angle A is formed between the straight bars 101 and the vertical axis X, and the acute angle A The angle range is 0-15°, and the length L of the straight bar 101 is not less than the chord length S of the upper arc-shaped connecting bar 102 and the lower arc-shaped connecting bar 103, so that the lower opening 104 and the upper opening 105 The strip-shaped opening along the vertical axis X direction greatly shortens the length of the transformer winding sheet compared with the traditional design, thereby further reducing the volume of the transformer and facilitating the installation and transportation of the transformer.

As shown in FIG. 4 , in this embodiment, welding lugs 106 are provided on the outer straight bar 101 to facilitate welding and assembly of winding pieces, effectively improve product performance, and increase production efficiency.

As shown in FIG. 2 , in this embodiment, the acute angle A is 0°, and the winding sheet with this structure forms less winding leakage inductance and achieves the best performance.

As shown in FIG. 3 , in this embodiment, the secondary winding 2 is composed of a coil winding, and the coil winding is easy to obtain materials and realize.

As shown in Figure 1, in this embodiment, there are four primary windings 1, three secondary windings 2, three iron cores 3, and two connecting iron cores 4, the structure The transformer constitutes a vertical structure with less leakage inductance, which is convenient for heat dissipation and assembly.

Claims (8)

1. A sandwich type transformer, characterized in that: comprising a plurality of primary windings (1) and a plurality of secondary windings (2), a plurality of first through holes (11) are provided on the primary winding (1) , a plurality of second through holes (21) are provided on the secondary winding (2), and an iron core ( 3), the primary winding (1) and the secondary winding (2) are arranged on the iron core (3) in a stacked manner, and the upper and lower ends of a plurality of the iron cores (3) are connected by connecting the iron core (4) connection, the primary winding (1) is composed of zigzag windings, the zigzag windings are formed by stacking zigzag winding sheets (10), and the zigzag winding sheets (10) include multiple straight strips (101), multiple The two ends of the straight strips (101) are alternately connected by the upper arc connecting strips (102) and the lower arc connecting strips (103) to form curved strips. The connecting strip (102) and the two straight strips (101) connected form the lower opening (104) for inserting the iron core, and the arc-shaped connecting strip (103) and the two straight strips connected The strip (101) encloses the upper opening (105) for inserting the iron core, an angle A is formed between the straight strip (101) and the vertical axis X, and the angle range of the angle A is 0-15°, The length L of the straight bar (101) is not less than the chord length S of the upper arc-shaped connecting bar (102) and the lower arc-shaped connecting bar (103), so that the lower opening (104), upper opening (105) ) is a strip-shaped opening along the vertical axis X direction. 2. A sandwich type transformer according to claim 1, characterized in that: the secondary winding (2) is arranged between two adjacent primary windings (1) up and down, and the primary winding (1) ) and the secondary winding (2) are evenly arranged on the iron core (3). 3. A sandwich transformer according to claim 1, characterized in that: the primary winding (1) is arranged between two adjacent secondary windings (2) up and down, and the primary winding (1) ) and the secondary winding (2) are evenly arranged on the iron core (3). 4. A sandwich type transformer according to claim 1, characterized in that: the primary winding (1) is composed of a coil winding. 5. A sandwich type transformer according to claim 1, characterized in that: welding ears (106) are provided on the outer straight bar (101). 6. A sandwich transformer according to claim 5, characterized in that: said angle A is 0°. 7. A sandwich type transformer according to claim 1, characterized in that: the secondary winding (2) is composed of a coil winding. 8. A sandwich type transformer according to claim 1, characterized in that: there are four primary windings (1), three secondary windings (2), and the iron core (3) is 3, and the connecting iron core (4) is 2.