CN108346505A - A kind of high-efficiency potential transformer - Google Patents

Abstract

The invention relates to the technical field of transformers, in particular to a high-efficiency transformer, including a source side, a secondary side, and a rectification filter circuit, characterized in that: the source side adopts a source side coil, and the number of turns of the source side coil is N; Adopt m secondary coils, the number of turns of each secondary coil is N/m, then the total number of turns of the secondary coil is N; m is an integer greater than 2, and N is an integer greater than m; the m The secondary coils are combined into at least one coil group, several secondary coils in each coil group are connected in parallel, and each coil group is electrically connected to a rectifying and filtering circuit one by one. Compared with the prior art, the present invention adopts a transformer whose source and secondary coils have the same total turns, but the secondary is divided into m coils, which can not only improve efficiency, but also reduce voltage; if multiple voltage outputs are required , and the number of parallel coil groups can be freely allocated according to the power of each channel, which is very convenient and flexible to manufacture; the source side and the secondary side only need to use the same specification wire.

Description

A High Efficiency Transformer

technical field

The invention relates to the technical field of transformers, in particular to a high-efficiency transformer.

Background technique

Commonly used power supplies include linear power supplies and switching power supplies. To obtain low-voltage linear power supplies, step-down transformers must be used.

At present, all step-down transformers are basically composed of coils with different turns on the source side and the secondary side, and the step-down transformers are basically N: 1 type. This kind of transformer has a large loss and low efficiency. In particular, wires of various specifications are required for winding, and the production is cumbersome. After the production is completed, the output power of each voltage is fixed, and the output power of each voltage cannot be flexibly configured.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide a transformer that can both improve efficiency and reduce voltage. The number of turns of the source and secondary coils is equal, but the secondary is divided into m coils. If multi-channel voltage output is required, the number of coil groups connected in parallel shall be distributed according to the power of each channel.

In order to achieve the above purpose, a high-efficiency transformer is designed, including a source side, a secondary side, and a rectification filter circuit. It is characterized in that: the source side uses a source side coil, and the number of turns of the source side coil is N; the secondary side uses m The secondary coil, the number of turns of each secondary coil is N/m, then the total number of turns of the secondary coil is N; m is an integer greater than 2, and N is an integer greater than m; the m secondary coils Combining at least one coil group, several secondary coils in each coil group are connected in parallel, and each coil group is electrically connected to a rectification filter circuit one by one.

When the source voltage is 220V, the secondary voltage is 220/mV.

The source coil and the secondary coil are wound with wires of the same specification.

Compared with the prior art, the present invention adopts a transformer whose source and secondary coils have the same total turns, but the secondary is divided into m coils, which can not only improve efficiency, but also reduce voltage; if multiple voltage outputs are required , and the number of parallel coil groups can be freely allocated according to the power of each channel, which is very convenient and flexible to manufacture; when making a transformer, the source side and the secondary side only need to use the same specification of wire, instead of using multiple specifications of wire, assembly Convenient.

Description of drawings

FIG. 1 is a circuit diagram using a single voltage output in Embodiment 1 of the present invention.

Fig. 2 is a circuit diagram using dual voltage outputs in Embodiment 2 of the present invention.

Detailed ways

The present invention can connect m secondary coils in parallel and then connect a rectifier filter circuit; also can divide m secondary coils into more than 2 coil groups, each coil group is provided with several secondary coils connected in parallel, each coil The groups are electrically connected to a rectifying and filtering circuit in one-to-one correspondence. Now further describe in detail in conjunction with the embodiments and accompanying drawings.

Example 1

In this example, make a 10V linear power supply as an example. Referring to Fig. 1, the value of m is 20, a total of 20 secondary coils are connected in parallel on the secondary side, and the output voltage is 220V/20=11V. Then, after rectification and filtering by the rectification and filtering circuit, a linear power supply of about 10V is obtained.

The source coil and the secondary coil are wound with wires of the same specification.

Example 2

Assuming that two outputs are taken as an example, that is, m secondary coils are divided into two coil groups, each coil group is formed by parallel connection of x secondary coils, and the other coil group is formed by parallel connection of y secondary coils, then x+y=m, x and y are integers greater than 0 respectively.

Among them, if we take the production of two-way 10V output linear power supply as an example, see Figure 2, the value of m is 20, and the secondary side uses two coil groups, because the output power of the two-way power supply is equal, that is, x=y=10, then each Each coil group adopts 10 secondary coils connected in parallel, and the output voltage is 220V/20=11V; then each rectification and filtering of the rectification and filtering circuit respectively obtains a linear power supply of about 10V.

If the output power of the two power supplies is not equal, that is, x≠y, assuming x>y, then the output power of the first path is greater than the output power of the second path; otherwise, when x<y, the output power of the first path is smaller than the output power of the second path .

Of course, the m secondary coils can also be divided into more coil groups as required, so as to realize more voltage outputs.

Claims (3)

1. A high-efficiency transformer comprises a source side, a secondary side, a rectification filter circuit, and is characterized in that: The source side adopts a source side coil, and the number of turns of the source side coil is N; The secondary side adopts m secondary coils, and the number of turns of each secondary coil is N/m, so the total number of turns of the secondary coil is N; m is an integer greater than 2, and N is an integer greater than m; The m secondary coils are combined into at least one coil group, several secondary coils in each coil group are connected in parallel, and each coil group is electrically connected to a rectifying and filtering circuit one by one. 2. A high-efficiency transformer as claimed in claim 1, wherein when said source voltage is 220V, said secondary voltage is 220/mV. 3. A high-efficiency transformer as claimed in claim 1, characterized in that: said source coil and secondary coil are wound with wires of the same specification.