CN205140674U - Transformer for distributed generator - Google Patents

Abstract

The utility model discloses a transformer for distributed power supply, which comprises a shell and a magnetic core. The shell is composed of a shell plate, a vacuum plate and an inner shell plate. The vacuum plate is located between the shell plate and the inner shell plate. The left and right ends of the shell are arranged symmetrically There are a number of ventilation holes, and dust-proof plates are installed in the ventilation holes. The magnetic core is located inside the shell. The magnetic core includes an upper arm, a connecting arm and a lower arm. The outside of the lower arm is equipped with a winding frame, and a number of through holes are opened on the winding frame. The winding frame on the upper arm is provided with a primary winding, and the winding frame on the lower arm is provided with a secondary winding. Insulators are provided between the primary windings, a dust-proof box is provided at the inner bottom of the shell, a groove is opened on the dust-proof box, an electrostatic generator is arranged inside the groove, and a dust adsorption net is arranged on the outside of the electrostatic generator . The utility model has the advantages of simple structure, small volume, long service life, good dustproof effect, good market prospect and easy popularization.

Description

A transformer for distributed power supply

technical field

The utility model relates to the field of electric equipment, in particular to a transformer for distributed power supply.

Background technique

The transformer for distributed power supply is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, secondary coil and iron core. In electrical equipment and wireless circuits, it is often used for raising and lowering voltage, matching impedance, safety isolation, etc. In a generator, whether the coil moves through the magnetic field or the magnetic field moves through the fixed coil, an electric potential can be induced in the coil. In both cases, the value of the magnetic flux remains the same, but the amount of magnetic flux intersecting the coil is different. Change, this is the principle of mutual induction. The transformer for distributed power supply is a device that uses electromagnetic mutual induction to transform voltage, current and impedance. The functions of the transformer for distributed power supply mainly include: voltage transformation; current transformation, impedance transformation; isolation; voltage stabilization (transformer for magnetically saturated distributed power supply), etc.

Distributed power supply transformers always generate losses when transmitting electric energy. This loss mainly includes copper loss and iron loss. Both copper loss and iron loss will generate a lot of heat. Generally, civilian distributed power supply transformers are used inside distributed power supply transformers. The distributed power supply is filled with transformer oil to take away this part of the heat. This part of the heat is circulated through the heat transfer oil to the heat pipe outside the distributed power transformer shell for heat dissipation. During the peak power consumption in summer, the temperature of the distributed power transformer is sharp As the temperature increases, the internal resistance of the distributed power transformer increases, which further aggravates the heat generation and makes the operation of the distributed power transformer relatively unstable. Therefore, heat dissipation is a major factor for the stable operation of the distributed power transformer. . The existing transformers for distributed power supply either have unsatisfactory heat dissipation effects or are too expensive to manufacture. Now there is an urgent need for a distributed power supply transformer with good heat dissipation effect and low cost.

Utility model content

The purpose of this utility model is to provide a transformer for distributed power supply with simple structure and good heat dissipation effect, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A transformer for distributed power supply, comprising a shell and a magnetic core, the shell is composed of a shell plate, a vacuum plate and an inner shell plate, the vacuum plate is located between the shell plate and the inner shell plate, and the left and right ends of the shell are symmetrically opened with A plurality of ventilation holes, dustproof plates are installed in the ventilation holes, the magnetic core is located inside the shell, the magnetic core includes an upper arm, a connecting arm and a lower arm, and the upper arm and the lower arm are respectively arranged on the upper and lower sides of the connecting arm Both ends, the upper arm and the outer side of the lower arm are equipped with a winding frame, the winding frame is provided with a number of through holes, the winding frame on the upper arm is provided with primary windings, and the winding frame on the lower arm is provided with secondary coils. The primary winding is provided with an insulator between the primary winding and the secondary winding, and a dust-proof box is provided at the inner bottom of the housing, and a groove is opened on the dust-proof box. Generator, the outside of the electrostatic generator is provided with a dust adsorption net.

As a further solution of the present utility model: the insulating member is in the shape of a flat plate.

As a further solution of the present invention: the cross-sections of the upper arm, the connecting arm and the lower arm are circular or square, and the cross-sectional areas of the upper arm, the connecting arm and the lower arm are equal.

As a further solution of the present invention: the magnetic core is an iron core or a copper core.

Compared with the prior art, the beneficial effect of the utility model is that a vacuum plate is set between the outer shell plate and the inner shell plate, which can effectively isolate the heat generated by the outer shell plate from being transmitted to the transformer for distributed power supply under the sun exposure At the same time, it can effectively isolate the noise generated by the instrument in the distributed power transformer from being transmitted to the outside world. There are several groups of corresponding ventilation holes on the casing, which can form air convection and accelerate heat dissipation. The ventilation holes are equipped with dust-proof panels. At the same time, it also prevents dust from entering the inside of the shell, which can increase the service life of the transformer for distributed power supply. By configuring the primary winding and secondary winding on the upper arm and lower arm of the magnetic core respectively, the width of the formed wire package is longer. The number of layers is less, so that the same number of winding coils requires a shorter total winding length, which saves the amount of wire and reduces the material cost. At the same time, due to fewer layers and thinner wire packages, the heat dissipation of the transformer for distributed power supply is improved, the overall temperature rise of the transformer for distributed power supply is greatly reduced, and the overall height of the transformer for distributed power supply is also reduced. There are winding frames on the outside of the arms, and several through holes are opened on the winding frames, which not only play the role of electrical insulation between the primary winding and secondary winding and the upper arm and lower arm, but also ensure that the magnetic core and the primary winding and The ventilation and creepage distance of the secondary winding further optimize the heat dissipation. The setting of the dust-proof box makes the dust entering the inside of the transformer adsorbed by the electrostatic generator to the dust adsorption net, the dust-proof effect is good, the influence of dust on the transformer is reduced, and the service life of the transformer is improved. The utility model has a simple structure and a small volume Small size, long service life, good heat dissipation effect through the combination of various heat dissipation structures, no need for external equipment, saving resources, reducing production costs, meeting people's use needs, good market prospects, and easy to promote.

Description of drawings

Fig. 1 is the structural representation of the utility model.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1 , in the embodiment of the present utility model, a kind of transformer for distributed power supply comprises shell 1 and magnetic core 2, and described shell 1 is made up of shell plate 3, vacuum plate 4 and inner shell plate 5, and described vacuum The plate 4 is located between the outer shell plate 3 and the inner shell plate 5, which can effectively isolate the heat generated by the outer shell plate 3 from being transferred to the transformer for distributed power supply under the sun exposure, and can effectively isolate the heat generated by the instrument in the transformer for distributed power supply. The noise is transmitted to the outside world. A number of ventilation holes 14 are symmetrically opened on the left and right ends of the casing 1. Dustproof panels 15 are installed in the ventilation holes 14, which can form air convection and accelerate heat dissipation. The ventilation holes are provided with dustproof panels. 15. While dissipating heat, it also prevents dust from entering the housing 1, avoiding too much dust inside the housing 1, which affects the use, and can increase the service life of the transformer for distributed power supply.

Magnetic core 2 is arranged in the inside of shell 1, and magnetic core 2 comprises upper arm 6, connecting arm 7 and lower arm 8, and described upper arm 6 and lower arm 8 are respectively arranged at the upper and lower ends of connecting arm 7, upper arm 6, connecting arm 7 The cross-section of the lower arm 8 is circular or square, and the cross-sectional areas of the upper arm 6, the connecting arm 7 and the lower arm 8 are equal, and the outer sides of the upper arm 6 and the lower arm 7 are provided with a winding frame 10, and the winding frame 9 is provided with a number of through holes 10, which not only play the role of electrical insulation between the primary winding 12 and secondary winding 11 and the upper arm 6 and lower arm 8, but also ensure that the magnetic core 2 and the primary winding 12 and secondary winding 11 ventilation and creepage distance, to further optimize the heat dissipation effect, the winding frame 9 on the upper arm 6 is provided with a primary winding 12, and the winding frame 9 on the lower arm 8 is provided with a secondary winding 11, the primary winding 12 and Insulators 13 are provided between the secondary windings 11 . By disposing the primary winding 11 and the secondary winding 12 on the upper arm 6 and the lower arm 8 of the magnetic core 2 respectively, the formed wire package has a longer width and fewer layers, so that the same number of winding coils requires a total winding The length of the wire becomes shorter, which saves the amount of wire and reduces the material cost. At the same time, due to the reduction in the number of layers and the thinning of the wire package, the heat dissipation of the transformer for distributed power supply is improved, the overall temperature rise of the transformer for distributed power supply is greatly reduced, and the overall height of the transformer for distributed power supply is also reduced.

The inner bottom of the housing 1 is provided with a dust-proof box 16, the dust-proof box 16 is provided with a groove 17, the inside of the groove 17 is provided with an electrostatic generator 18, and the outside of the electrostatic generator 18 is provided with dust Adsorption net 19. The dust entering the inside of the transformer is adsorbed by the electrostatic generator 18 to the dust adsorption net 19, the dustproof effect is good, the influence of dust on the transformer is reduced, and the service life of the transformer is improved. The utility model has the advantages of simple structure, small volume and long service life. Through the combination of various heat dissipation structures, the heat dissipation effect is good, and no external equipment is needed, which saves resources, reduces production costs, meets people's use needs, and has a good market prospect. , easy to promote.

Claims (4)

1. a transformer for distributed power supply, comprising shell (1) and magnetic core (2), is characterized in that, described shell (1) is made of shell plate (3), vacuum plate (4) and inner shell plate (5) ), the vacuum panel (4) is located between the outer shell plate (3) and the inner shell plate (5), and a number of ventilation holes (14) are symmetrically opened on the left and right ends of the outer shell (1), and the ventilation holes (14) A dust-proof plate (15) is installed inside, the magnetic core (2) is arranged inside the shell (1), and the magnetic core (2) includes an upper arm (6), a connecting arm (7) and a lower arm (8), The upper arm (6) and the lower arm (8) are respectively arranged at the upper and lower ends of the connecting arm (7), and the outer sides of the upper arm (6) and the lower arm (7) are provided with winding frames (10). The frame (9) is provided with several through holes (10), the winding frame (9) on the upper arm (6) is provided with primary windings (12), and the winding frame (9) on the lower arm (8) is provided with There is a secondary winding (11), an insulator (13) is provided between the primary winding (12) and the secondary winding (11), and a dustproof box (16) is provided at the inner bottom of the casing (1), Offer groove (17) on the described dustproof box (16), the inside of described groove (17) is provided with electrostatic generator (18), the outside of electrostatic generator (18) is provided with dust adsorption net (19). ). 2. The transformer for distributed power supply according to claim 1, characterized in that, the insulating member (13) is in the shape of a flat plate. 3. A transformer for distributed power supply according to claim 1, characterized in that, the cross-sections of the upper arm (6), the connecting arm (7) and the lower arm (8) are circular or square, and the upper arm (6), the cross-sectional areas of the connecting arm (7) and the lower arm (8) are equal. 4. A transformer for distributed power supply according to claim 1, characterized in that, the magnetic core (2) is an iron core or a copper core.