CN202662442U

CN202662442U - Planar high-frequency transformer based on single-deck PCB (Printed Circuit Board)

Info

Publication number: CN202662442U
Application number: CN201220268074XU
Authority: CN
Inventors: 易雪
Original assignee: SHENZHEN CE ELECTRONICS CO Ltd
Current assignee: SHENZHEN CE ELECTRONICS CO Ltd
Priority date: 2012-06-08
Filing date: 2012-06-08
Publication date: 2013-01-09
Anticipated expiration: 2022-06-08

Abstract

The utility model discloses a planar high-frequency transformer based on a single-deck PCB (Printed Circuit Board). The planar high-frequency transformer comprises a first magnetic core, a first PCB (Printed Circuit Board), a second PCB and a second magnetic core which are laminated in sequence, wherein the first PCB and the second PCB are etched with continuous copper spiral wires which are respectively used as a primary coil and a secondary coil, and 4 external pins are arranged on the secondary PCB. A copper sheet is arranged between the first PCB and the first magnetic core. The planar high-frequency transformer based on the single-deck PCB is simple in structure, easy to implement, small in leakage inductance, low in loss and favorable in heat dissipation performance.

Description

Planar high-frequency transformer based on the individual layer pcb board

Technical field

The utility model relates to a kind of planar high-frequency transformer based on the individual layer pcb board.

Background technology

Traditional high frequency transformer (high frequency refers generally to be higher than the frequency of 1kHz), all adopt copper conductor to come coiling, not only the materials'use amount is more, and a little less than the antijamming capability, in addition, the high frequency transformer of this mode, leakage inductance is larger, thereby loss is also more outstanding, and, heat dissipation problem also is traditional high frequency transformer one large problem, therefore is necessary to design a kind of novel transformer.

The utility model content

Technical problem to be solved in the utility model provides a kind of planar high-frequency transformer based on the individual layer pcb board, should be simple based on the planar high-frequency transformer device structure of individual layer pcb board, be easy to realize that leakage inductance is little that loss is little.

The technical solution of utility model is as follows:

A kind of planar high-frequency transformer based on the individual layer pcb board, comprise the first stacked successively magnetic core, the first pcb board, the second pcb board and the second magnetic core, all be etched with on the first pcb board and the second pcb board respectively as the continuous copper helix of primary coil and secondary winding, be provided with 4 external pins at the second pcb board.

Between the first pcb board and the first magnetic core, be provided with copper sheet.

Beneficial effect:

Planar high-frequency transformer based on the individual layer pcb board of the present utility model adopts individual layer PCB to replace the copper conductor in the common transformer, and volume is little, and is lightweight, has high power density;

And basic copper loss and the supplementary load loss of winding are little, and total iron loss is less, thereby delivery of electrical energy efficient is high;

Have low leakage inductance, and the shielding action of the waveform of pulse and magnetic core is all better, has good magnetic shield performance, anti-interference is good, and operating frequency range is wide.

This planar high-frequency transformer based on the individual layer pcb board is a kind of novel flat surface transformer, what adopt is flat magnetic core, has larger surface area and length of magnetic path ratio, both increase area of dissipation, reduced thermal resistance, improved power density, increased again exciting current, reduce no-load loss, reduced leakage inductance, improved efficient.

The effect of copper sheet is further to improve heat dispersion, and better shielding is provided.

Description of drawings

Fig. 1 is the structural representation (explosive view) of the planar high-frequency transformer based on the individual layer pcb board of the present utility model.

Label declaration: 1-the first magnetic core, 2-copper sheet, 3-the first pcb board, 4-the second pcb board, 5-the second magnetic core.

Embodiment

Below with reference to the drawings and specific embodiments the utility model is described in further details:

Embodiment 1:

As shown in Figure 1, a kind of planar high-frequency transformer based on the individual layer pcb board, comprise the first stacked successively magnetic core, the first pcb board, the second pcb board and the second magnetic core, all be etched with on the first pcb board and the second pcb board respectively as the continuous copper helix of primary coil and secondary winding, be provided with 4 external pins at the second pcb board.Between the first pcb board and the first magnetic core, be provided with copper sheet.

The magnetic core of two ferrite materials (i.e. the first magnetic core and the second magnetic core) adopts epoxy resin to bond together.

Claims

1. planar high-frequency transformer based on the individual layer pcb board, it is characterized in that, comprise the first stacked successively magnetic core, the first pcb board, the second pcb board and the second magnetic core, all be etched with on the first pcb board and the second pcb board respectively as the continuous copper helix of primary coil and secondary winding, be provided with 4 external pins at the second pcb board.

2. the planar high-frequency transformer based on the individual layer pcb board according to claim 1 is characterized in that, is provided with copper sheet between the first pcb board and the first magnetic core.