CN204596611U

CN204596611U - The winding of integrated main transformer and isolation signals conveyer and line construction

Info

Publication number: CN204596611U
Application number: CN201420619016.6U
Authority: CN
Inventors: 滕传超; 魏槐
Original assignee: JIANGSU ZHAONENG ELECTRONICS CO Ltd
Current assignee: JIANGSU ZHAONENG ELECTRONICS CO Ltd
Priority date: 2014-10-23
Filing date: 2014-10-23
Publication date: 2015-08-26
Anticipated expiration: 2024-10-23

Abstract

The utility model proposes winding and the line construction of a kind of integrated main transformer and isolation signals conveyer, it is characterized in that, isolation signals conveyer has the first and second two windings; The magnetic flux that the winding of main transformer produces can not produce induced voltage in the first winding of isolation signals conveyer, but can produce induced voltage in the second winding of isolation signals conveyer.The utility model provides a kind of winding construction using single magnetic core to form multiple magnetic element.The method can reduce product cost and the volume of Switching Power Supply effectively, improves reliability.

Description

The winding of integrated main transformer and isolation signals conveyer and line construction

Technical field

The utility model relates to field of switch power, the transformer particularly used in Switching Power Supply and isolation signals conveyer.

Background technology

Switching Power Supply occupies of paramount importance status due to its small size and high efficiency in present generation power supplies.

Isolation type switching power supply has a power transformer.This transformer has former limit and vice-side winding, and familiar example as shown in Figure 1.Controller is positioned to the design of the insulating power supply on former limit, the detection signal of secondary needs by special isolating device, as photoelectrical coupler, is sent to the controller on former limit.Such isolating device cost is high, and volume is large, and reliability is low.Required is that a kind of cost is low, and volume is little, the isolation signals transfer approach that reliability is high.

Utility model content

Technical problem to be solved in the utility model is to provide the winding of a kind of integrated main transformer and isolation signals conveyer and line construction substitutes traditional isolating device.

The utility model realizes above-mentioned purpose by following technical proposals:

The winding of integrated main transformer and isolation signals conveyer and a line construction, is characterized in that, isolation signals conveyer has the first and second two windings; The magnetic flux that the winding of main transformer produces can not produce induced voltage in the first winding of isolation signals conveyer, but can produce induced voltage in the second winding of isolation signals conveyer.The former limit of above-mentioned main transformer and vice-side winding are all around on the center pillar of magnetic core; First winding of isolation signals conveyer in the direction of the clock around certain number of turns, then continues on the second side column by counterclockwise around the same number of turns on the first side column; The sectional area of the first and second side columns of above-mentioned magnetic core is identical; Second winding of isolation signals conveyer is around on any one side column; The external flow restricter of second winding of isolation signals conveyer and a tandem tap.

Accompanying drawing explanation

Fig. 1 is the conventional transformer with former limit winding and vice-side winding.

Fig. 2 is the example adopting the utility model integrated transformer and signal transmitter and one.

Embodiment

The utility model preferred embodiment is provided, to describe the technical solution of the utility model in detail below in conjunction with accompanying drawing.

The utility model provides winding and the line construction of a kind of integrated main transformer and isolation signals conveyer.

Shown in Fig. 2 is winding and the line construction of above-mentioned integrated main transformer and isolation signals conveyer.Main transformer is made up of the former limit winding 210 be wound on center pillar 203 and vice-side winding 211.The former limit winding 220 that isolation signals conveyer is wound on the first side column 201 and the second side column 202 by series connection is formed with the vice-side winding 221 be wound on the second side column 202.On winding 220 on the left side post along clockwise direction around certain number of turns (be two circles in Fig. 2 example.The concrete number of turns is determined by electrical design.), then continue on the right on post according to counterclockwise around the number of turns identical with on the post of the left side.The magnetic flux produced by the winding on the post of the left side when normal work is identical with the magnetic flux amplitude that the winding on the post of the right produces, but direction in center pillar 203 on the contrary, therefore can not produce induced voltage in the winding 210 and 211 of main transformer.The magnetic flux produced in center pillar 203 by the former vice-side winding 210 and 211 of main transformer, because of in the closed-loop path that is assigned to two side columns 201 and 202 equably and forms respectively, therefore also can not produce induced voltage in the winding 220 of isolation signals conveyer.When secondary has the signal needing to be sent to former limit, secondary circuit closes the switch S of connecting with winding 221, the magnetic flux that induced current in the loop be made up of winding 221, current-limiting resistance R and switch S produces destroys the equilibrium of magnetic flux in original two side columns, makes to occur induced voltage in winding 220.This voltage represents secondary to be needed to be sent to signal originally.Such signal transmission may be used for the guard signal of secondary fault, or any secondary needs the status signal being sent to former limit.From the angle of practicality, generally can add some air gaps on three legs of magnetic core, to ensure that magnetic flux is uniformly distributed according to the form of design preferably.If for the electric source topology of flyback class, the magnetizing inductance of transformer needs stored energy, and so larger air gap will be necessary.

Although the winding of a kind of integrated main transformer and isolation signals conveyer and line construction are just to describing by E shape+I shape combined magnet core, its principle is applicable equally to multiple core structure.Above-mentioned current-limiting resistance R also can be the distributed resistance of circuit or the internal resistance of switch S.

Although the foregoing describe embodiment of the present utility model, but those skilled in the art is to be understood that, these only illustrate, under the prerequisite not deviating from principle of the present utility model and essence, can make various changes or modifications to these execution modes.Therefore, protection range of the present utility model is defined by the appended claims.

Claims

1. the winding of integrated main transformer and isolation signals conveyer and a line construction, is characterized in that, isolation signals conveyer has the first and second two windings; The former limit of above-mentioned main transformer and vice-side winding are all around on the center pillar of magnetic core; First winding of isolation signals conveyer in the direction of the clock around certain number of turns, then continues on the second side column by counterclockwise around the same number of turns on the first side column; The sectional area of the first and second side columns of above-mentioned magnetic core is identical; Second winding of isolation signals conveyer is around on any one side column; The external flow restricter of second winding of isolation signals conveyer and a tandem tap.