CN215772922U

CN215772922U - Multi-output power supply adopting matrix transformer

Info

Publication number: CN215772922U
Application number: CN202121838977.2U
Authority: CN
Inventors: 杨汉中; 殷俊
Original assignee: Dengti Electronic Technology Shanghai Co ltd
Current assignee: Dengti Electronic Technology Shanghai Co ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2022-02-08
Anticipated expiration: 2031-08-06

Abstract

The utility model discloses a multi-output power supply adopting a matrix transformer, which comprises a transformer input circuit, a transformer output circuit, a first magnetic core, an input winding, a second magnetic core, a first output winding, a second output winding and a third output winding, wherein the transformer input circuit is provided with the input winding, the transformer output circuit is provided with the first output winding, the second output winding and the third output winding, and the transformer input circuit and the transformer output circuit are connected through the first magnetic core and the second magnetic core. This structure can reduce the winding number of turns effectively, and a plurality of magnetic cores connect in parallel and promoted the magnetic circuit area, has reduced the risk of magnetic core saturation, consequently reduction winding number of turns that again can be further, simultaneously because the reduction of magnetization curve area can reduce the transformer iron loss, and simplified the transformer structure, promoted the window utilization ratio of transformer, same window area can use bigger line footpath in order to reduce the impedance, must power density can obtain effectual promotion.

Description

Multi-output power supply adopting matrix transformer

Technical Field

The utility model relates to the field of power supplies, in particular to a multi-output power supply adopting a matrix transformer.

Background

Generally, a plurality of windings are arranged on the secondary side of a switching power supply with multi-output, the windings are wound on the same transformer, different voltages are obtained through different turn ratios, the risk of magnetic core saturation is reduced, the turn ratios of the windings can be further reduced, the iron loss of the transformer in the conventional output power supply is large, the structure of the transformer is complex, the window utilization rate of the transformer is low, and therefore the multi-output power supply with the matrix transformer is provided.

Disclosure of Invention

The present invention is directed to a multiple output power supply using a matrix transformer, which solves the above problems of the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme: a multi-output power supply adopting a matrix transformer comprises a transformer input circuit, a transformer output circuit, a first magnetic core, an input winding, a second magnetic core, a first output winding, a second output winding and a third output winding, wherein the transformer input circuit is provided with the input winding, and the transformer output circuit is provided with the first output winding, the second output winding and the third output winding.

As a preferred embodiment of the present invention, the transformer input circuit and the transformer output circuit are connected through a first magnetic core and a second magnetic core.

As a preferable embodiment of the present invention, the first output winding is connected to the first magnetic core and the second magnetic core.

As a preferable technical solution of the present invention, the second output winding is connected to the second magnetic core, the third output winding is connected to the first magnetic core, and the second output winding is connected to the third output winding.

The utility model has the beneficial effects that: this structure can reduce the winding number of turns effectively, and a plurality of magnetic cores connect in parallel and promoted the magnetic circuit area, has reduced the risk of magnetic core saturation, consequently reduction winding number of turns that again can be further, simultaneously because the reduction of magnetization curve area can reduce the transformer iron loss, and simplified the transformer structure, promoted the window utilization ratio of transformer, same window area can use bigger line footpath in order to reduce the impedance, must power density can obtain effectual promotion.

Drawings

FIG. 1 is a block diagram of the present invention.

In the figure: 1. transformer input circuit, 2, transformer output circuit, 3, first magnetic core, 4, input winding, 5, second magnetic core, 6, first output winding, 7, second output winding, 8, third output winding.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the utility model more readily understood by those skilled in the art, and thus will more clearly and distinctly define the scope of the utility model.

Example (b): referring to fig. 1, the present invention provides a technical solution: a multi-output power supply adopting a matrix transformer comprises a transformer input circuit 1, a transformer output circuit 2, a first magnetic core 3, an input winding 4, a second magnetic core 5, a first output winding 6, a second output winding 7 and a third output winding 8, wherein the transformer input circuit 1 is provided with the input winding 4, and the transformer output circuit 2 is provided with the first output winding 6, the second output winding 7 and the third output winding 8.

The transformer input circuit 1 and the transformer output circuit 2 are connected by a first magnetic core 3 and a second magnetic core 5.

The first output winding 6 is connected to the first magnetic core 3 and the second magnetic core 5.

The second output winding 7 is connected with the second magnetic core 5, the third output winding 8 is connected with the first magnetic core 3, and the second output winding 7 is connected with the third output winding 8.

The working principle is as follows: the utility model provides an adopt matrix transformer's multiplexed output power, including transformer input circuit 1, transformer output circuit 2, first magnetic core 3, input winding 4, second magnetic core 5, first output winding 6, second output winding 7 and third output winding 8, multiplexed output's switching power supply, adopt the multi-winding design of the matrix transformer of a plurality of magnetic cores, when output voltage is each other for the proportion, the different magnetic core number of transformer winding difference envelopment, this can reduce the winding number of turns, can make the transformer get the structure simpler simultaneously, and can conveniently realize the multiplexed output voltage of the proportion of various differences. As shown in fig. 1: the primary winding simultaneously bypasses the two magnetic cores, and the generated magnetic flux is 2 phi; the first output winding 6 simultaneously bypasses the two magnetic cores, and the obtained magnetic flux is 2 phi per secondary winding/primary winding; the second output winding 7 and the third output winding 8 only wind around one magnetic core, and the obtained magnetic flux is phi x secondary winding number/primary winding number; therefore, when the voltage of the first output winding 6 is twice the voltage of the second output winding 7 and the third output winding 8, the number of turns of the first output winding 6 and the windings of the second output winding 7 and the third output winding 8 can be the same, so that the number of turns of the first output winding 6 only needs to be 1/2, and the same design method is adopted. The number of matrix cores may be N, and the number of outputs may also be N.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. The utility model provides an adopt multiplexed output power of matrix transformer, includes transformer input circuit (1), transformer output circuit (2), first magnetic core (3), input winding (4), second magnetic core (5), first output winding (6), second output winding (7) and third output winding (8), its characterized in that: an input winding (4) is arranged on the transformer input circuit (1), and a first output winding (6), a second output winding (7) and a third output winding (8) are arranged on the transformer output circuit (2).

2. A multiple output power supply using matrix transformers according to claim 1, wherein: the transformer input circuit (1) and the transformer output circuit (2) are connected through a first magnetic core (3) and a second magnetic core (5).

3. A multiple output power supply using matrix transformers according to claim 1, wherein: the first output winding (6) is connected with the first magnetic core (3) and the second magnetic core (5).

4. A multiple output power supply using matrix transformers according to claim 1, wherein: the second output winding (7) is connected with the second magnetic core (5), the third output winding (8) is connected with the first magnetic core (3), and the second output winding (7) is connected with the third output winding (8).