CN205847103U

CN205847103U - A kind of DC DC power module

Info

Publication number: CN205847103U
Application number: CN201620831761.6U
Authority: CN
Inventors: 张志宝; 许文专; 张怡
Original assignee: JIANGYIN SFERE ELECTRIC CO Ltd
Current assignee: JIANGYIN SFERE ELECTRIC CO Ltd
Priority date: 2016-08-02
Filing date: 2016-08-02
Publication date: 2016-12-28
Anticipated expiration: 2026-08-02

Abstract

The utility model discloses a kind of DC DC power module, including primary circuit, switch transformer, secondary circuit；Primary circuit input connects external dc voltage, primary circuit output connecting valve transformator primary side, the secondary side output of switch transformer connects secondary circuit input, the DC voltage of input is converted into high frequency square wave voltage signal by primary circuit, and high-frequency voltage signal is converted into corresponding voltage magnitude signal through secondary circuit output smoothing d. c. voltage signal according to transformer voltage ratio by switch transformer.It is simple that this utility model has circuit topological structure, and cost is relatively low, efficiency advantages of higher.

Description

A kind of DC-DC power module

Technical field

This utility model relates to Power convert field, particularly relates to a kind of DC-DC power module.

Background technology

At present, industrial automation generally uses DC/DC power transfer module, such as gold yang invigorating brand power module The kinds such as F0505, F0515, F0524, these power modules expensive, every price general ten or twenty block, set at product Meter have to consider components and parts cost when selecting these power modules.

Summary of the invention

Goal of the invention: the purpose of this utility model be to provide a kind of there is low cost, DC-DC power module that efficiency is high.

Summary of the invention: DC-DC power module described in the utility model, including primary circuit, switch transformer, secondary electrical Road；Described primary circuit input connects external dc voltage, and described primary circuit output connecting valve transformator is once Side, the secondary side of described switch transformer connects secondary circuit input, and the DC voltage of input is converted into height by primary circuit Frequently square wave voltage signal, high-frequency voltage signal is converted into corresponding voltage magnitude signal according to transformer voltage ratio by switch transformer Through secondary circuit output smoothing d. c. voltage signal.

Further, the topology of described primary circuit is H bridge-type structure.

Further, described switch transformer is isolation type high frequency transformer.

Further, described switch transformer magnetic core is toroidal core.

Further, described switch transformer primary side is pressure for AC3kV with secondary side.

Further, described secondary circuit uses push-pull type rectification output.

Further, described primary circuit input direct voltage is+5V.

Further, described secondary circuit output DC voltage is+5V ,+15V or+24V.

Further, described secondary circuit output is 1W or 2W.

Beneficial effect: the DC-DC power module that this utility model provides, designs electricity by the no-load voltage ratio of reasonable selection of transformer The output voltage of source module, it is simple that this utility model has circuit topological structure, low cost, efficiency advantages of higher.

Accompanying drawing explanation

Fig. 1 is schematic diagram of the present utility model；

Fig. 2 is utility model works schematic diagram；

Fig. 3 is utility model works schematic diagram；

Fig. 4 is circuit diagram of the present utility model；

Fig. 5 is transformator primary side oscillogram of the present utility model；

Fig. 6 is push-pull type rectification output waveform figure of the present utility model.

Detailed description of the invention

DC-DC power module of the present utility model is as it is shown in figure 1, include primary circuit 1, switch transformer 2, secondary circuit 3；Primary circuit 1 input connects external dc voltage, and primary circuit 1 exports the primary side of connecting valve transformator 2, switchs transformation The secondary side output of device 2 connects secondary circuit 3 and inputs.The DC voltage of input is converted into high frequency square wave voltage letter by primary circuit Number, it is defeated through secondary circuit that high-frequency voltage signal is converted into corresponding voltage magnitude signal according to transformer voltage ratio by switch transformer Go out smooth dc voltage signal.

Work process of the present utility model is as shown in Figure 2 and Figure 3:

Primary circuit 1 is formed H bridge type topological structure by switching tube Q1, Q2, Q3, Q4；Switch transformer 2 is isolation type high frequency Transformator, magnetic core uses toroidal core, primary side and the pressure of secondary side to reach AC3KV；Secondary circuit 3 by diode D1, D2, Electric capacity C2 composition push-pull type rectification output.

Specific works process:

As in figure 2 it is shown, when primary circuit 1 breaker in middle pipe Q1, Q4 turn on, the primary side of switch transformer 2 has electric current Passing through, current path as represented by the arrows in the dashed line in figure 2, now produces induction electromotive force, induction electric at transformator T1 primary side The anode of gesture is the Same Name of Ends (primary side * end in Fig. 2) in figure, simultaneously at the secondary side induced voltage of transformator T1, faradism Positive pressure end (secondary side circuit 1. * end in Fig. 2), is output as loading RL through the diode D1 of secondary circuit 3 and electric capacity C2 rectification and carries For current loop, current path is that in secondary circuit 3 loop is 1..

In Fig. 3, when primary circuit 1 breaker in middle pipe Q2, Q3 turn on, the primary side of switch transformer 2 there is electric current to pass through, Current path, as shown in dotted arrow in Fig. 3, now produces induction electromotive force at transformator T1 primary side, and induction electromotive force is just End is primary side different name end in figure, simultaneously at the secondary side induced voltage of transformator T1, and induced voltage anode (secondary side in Fig. 3 Different name end), it is output as loading RL through the diode D2 of secondary circuit 3 and electric capacity C2 rectification and current loop is provided, current path is In secondary circuit 3, loop is 2..

In Fig. 4, this utility model DC-DC power module to be described as a example by input voltage 5V, output voltage 5V, power 2W A kind of embodiment: primary circuit uses to have and is internally integrated the integrated circuit U1 of H bridge topological structure (brand sage nation is micro- SGM46000)；Switch transformer T1 uses T6*3*3 toroidal core (hat reaches magnetic industry), and the turn ratio of transformator is 10:11, transformator Primary side three layer insulation wire, secondary side enamel-covered wire coiling, transformator primary side and the pressure of secondary side reach AC3KV；Secondary Level circuit uses Schottky diode D1, D2 (SS14AF) and electric capacity C6, C10 composition push-pull type rectification output.

In Fig. 5, in primary circuit, direct current 5V input voltage is converted into the voltage square wave signal of 270kHz by integrated circuit U1, Dutycycle is 0.5.

In Fig. 6, after the voltage square wave signal of the 270kHz of primary side is changed by switch transformer T1 by transformator, through secondary Schottky diode D1, D2 (SS14AF) and electric capacity C6, C10 composition push-pull type rectification output 5V DC voltage in circuit.

The DC-DC power module that the present invention provides designs the output of power module by the no-load voltage ratio of reasonable selection of transformer Voltage, it is simple that this utility model has circuit topological structure, low cost, efficiency advantages of higher.

Claims

1. a DC-DC power module, it is characterised in that: include primary circuit (1), switch transformer (2), secondary circuit (3)； Primary circuit (1) input connects external dc voltage, and primary circuit (1) output connecting valve transformator (2) primary side, switch becomes The secondary side output of depressor (2) connects secondary circuit (3) input, and the DC voltage of input is converted into high frequency by primary circuit (1) Square wave voltage signal, high-frequency voltage signal is converted into corresponding voltage magnitude according to transformer voltage ratio by switch transformer (2) to be believed Number through secondary circuit (3) output smoothing d. c. voltage signal.

DC-DC power module the most according to claim 1, it is characterised in that: the topology of described primary circuit (1) is H bridge Type structure.

DC-DC power module the most according to claim 1, it is characterised in that: described switch transformer (2) is isolated height Frequency power transformer.

DC-DC power module the most according to claim 3, it is characterised in that: described switch transformer (2) magnetic core is annular Magnetic core.

DC-DC power module the most according to claim 1, it is characterised in that: described secondary circuit (3) uses push-pull type whole Stream output.

DC-DC power module the most according to claim 1, it is characterised in that: described primary circuit (1) input direct voltage For+5V.

DC-DC power module the most according to claim 1, it is characterised in that: described secondary circuit (3) output DC voltage For+5V ,+15V or+24V.

DC-DC power module the most according to claim 7, it is characterised in that: described secondary circuit (3) output is 1W Or 2W.