CN205584025U

CN205584025U - Flyback switching power supply and in power output transformer thereof

Info

Publication number: CN205584025U
Application number: CN201620079948.5U
Authority: CN
Inventors: 林永才; 王俊涛
Original assignee: SUZHOU SHIYUN ROBOT Co Ltd
Current assignee: SUZHOU SHIYUN ROBOT Co Ltd
Priority date: 2016-01-27
Filing date: 2016-01-27
Publication date: 2016-09-14
Anticipated expiration: 2026-01-27

Abstract

The utility model discloses a can carry high power density and conversion efficiency's flyback switching power supply's power output transformer, include: ware body and coiling are at ware first, secondary coil on one's body, the ware be the magnetic core as the magnetic core of making by the magnetic. The utility model also provides a flyback switching power supply that can increase power, its structure includes: direct current input circuit, inverter circuit and rectifier regulator output circuit, inverter circuit's power output transformer has adopted the power output transformer. Power transformer be particularly useful for some flyback switching power supply that have relatively high expectations to conversion efficiency or power density.

Description

A kind of inverse-excitation type switch power-supply and power output transformer therein

Technical field

This utility model relates to a kind of Switching Power Supply and power output transformer therein, refers more particularly to anti- Excitation type switch power-supply and power output transformer therein.

Background technology

It is known that powder core is to form with the repressed sintering of dielectric film by wrapping up in outside fine magnetic powder particle, inside have Distributed air gap, is typically used as the inductance of filtering.Based on this traditional view, traditional inverse-excitation type (also known as Flyback Flyback) Switching Power Supply, power output transformer therein, generally by two blocks of manganese-zinc ferrite magnetic Block is put together, and must be provided with the centralized air gap of properly distance between the two magnetic piece, and ferritic magnetic is satisfied Relatively low with intensity, it is lost of a relatively high.The circuit of inverse-excitation type switch power-supply is simple, and cost is relatively low；But When power is bigger, air gap significantly increases and loss can be caused to increase so that the volume of transformer needed for inverse-excitation type is wanted Big than non-inverse-excitation type, this reduces conversion efficiency and the power density of power output transformer, increases Add cost.Which results in the power of the inverse-excitation type switch power-supply using this power output transformer not It is fit to do big.

Utility model content

One to be solved in the utility model technical problem is that: provide one can improve power density and conversion The power output transformer of the inverse-excitation type switch power-supply of efficiency.

For solving above-mentioned technical problem, the technical scheme that this utility model is used is: a kind of flyback switching The power output transformer of power supply, including: device body be wound on the primary and secondary coil with device, described Device is as the magnetic core being made up of magnetic powder i.e. powder core.

As a kind of preferred version, in the power output transformer of described inverse-excitation type switch power-supply, described Powder core be low-loss, high magnetic saturation intensity powder core.

As a kind of preferred version, in the power output transformer of described inverse-excitation type switch power-supply, described Low-loss, high magnetic saturation intensity powder core is made up of Fe-Si-Al magnetic.

As a kind of preferred version, in the power output transformer of described inverse-excitation type switch power-supply, described Low-loss, high magnetic saturation intensity powder core is made up of nanocrystalline magnetic.

To be solved in the utility model another technical problem is that: provides one can carry high-power inverse-excitation type Switching Power Supply.

For solving another above-mentioned technical problem, the technical scheme that this utility model is used is: inverse-excitation type Switching Power Supply, including: direct-flow input circuit, inverter circuit and rectifying and voltage-stabilizing output circuit, described inverse-excitation type It is new that the power output transformer of the most described inverter circuit of power output transformer of Switching Power Supply have employed this practicality Power output transformer described in type.

As a kind of preferred version, in described inverse-excitation type switch power-supply, described direct-flow input circuit bag Include: input rectification circuit and the input filter circuit matched with input rectification circuit.

The beneficial effects of the utility model are: this utility model overcomes traditional view, by using low-loss high The power output transformer that magnetic saturation intensity powder core is made, its device body is typically integral type annular structure, i.e. Make to be that two magnetic piece are put together, be the most also not required to arrange cushion block, eliminate centralized air gap, be greatly improved Power density and conversion efficiency, reduce volume of transformer, apply it on flyback switching source, can To do greatly by the power of inverse-excitation type switch power-supply, its power density is to use conventional power output transformator to make Inverse-excitation type switch power-supply twice more than, achieve beyond thought technique effect.

Accompanying drawing explanation

Fig. 1 is a kind of structural representation of magnetic core described in the utility model.

Fig. 2 is the another kind of structural representation of magnetic core described in the utility model.

Fig. 3 is the electric theory structure schematic diagram of inverse-excitation type switch power-supply described in the utility model.

Detailed description of the invention

Below in conjunction with the accompanying drawings, describe power output transformer described in the utility model in detail and use this power The specific embodiments of the inverse-excitation type switch power-supply of output transformator:

The power output transformer of inverse-excitation type switch power-supply described in the utility model, its structure includes: device body And it is wound on the primary and secondary coil with device and secondary coil--shown in Figure 3, described device body can To be the device body 1 of the integral type annular structure shown in Fig. 1, it is also possible to be by two pieces of E-type magnetic blocks 21 and 22 The device body 2 being put together, but no matter be device body 1 or device body 2, all for by Fe-Si-Al magnetic or nanocrystalline magnetic The magnetic core that the magnetic powders such as powder are made i.e. low-loss, high magnetic saturation intensity powder core.

Certainly, described device body can also be put together by the magnetic piece of other shapes, but the magnetic piece being put together Between very close to each other.

As it is shown on figure 3, inverse-excitation type switch power-supply described in the utility model, including: direct-flow input circuit (figure The input power of 3), inverter circuit and rectifying and voltage-stabilizing output circuit, described inverter circuit is mainly by power half Conductor switching device (switching tube in Fig. 3) and above-mentioned power output transformer are constituted, described rectification Voltage-stabilizing output circuit includes: output rectification circuit and mu balanced circuit (output circuit in Fig. 3), described is defeated Go out rectification circuit and include rectifier tube and filter capacitor.

When reality is applied, the described direct-flow input circuit in inverse-excitation type switch power-supply is mainly by input rectifying Circuit and the input filter circuit matched with input rectification circuit are constituted.

The operation principle of above-mentioned Switching Power Supply: direct-flow input circuit converts alternating current to unidirectional current, inversion electricity Unidirectional current reconvert is become alternating current again and exports by road, and its detailed process is: switching tube turns on, and drives and becomes The primary coil of depressor, makes electrical power storage in transformator, and then, switching tube turns off, and is stored in transformator In electric energy be discharged into secondary coil；This process makes electric energy be delivered to secondary coil, and foundation from primary coil Primary coil and the turn ratio of secondary coil, obtain desired output voltage.

In sum, preferred embodiment the most of the present utility model, not it is used for limiting this utility model The scope implemented, all according to the shape described in this utility model right, structure, feature and spirit institute Impartial change and the modification made, all should be included in right of the present utility model.

Claims

1. a power output transformer for inverse-excitation type switch power-supply, including: device body be wound on the primary and secondary coil with device, it is characterised in that: described device is as the magnetic core being made up of magnetic powder i.e. powder core.

2. an inverse-excitation type switch power-supply, including: direct-flow input circuit, inverter circuit and rectifying and voltage-stabilizing output circuit, it is characterised in that: the power output transformer of the most described inverter circuit of power output transformer of described inverse-excitation type switch power-supply uses the power output transformer described in claim 1.

Inverse-excitation type switch power-supply the most according to claim 2, it is characterised in that: described direct-flow input circuit includes: input rectification circuit and the input filter circuit matched with input rectification circuit.