CN205753990U - A kind of high isolation DC-DC power module - Google Patents

Abstract

This utility model provides a kind of high isolation DC DC power module, including transformator, input filter module, high isolation control module, energy-storage module, output rectification module, output filtration module, transformator uses annular transformator, it is cased with insulation sleeve outside the magnetic core of transformator, transformer coiling uses high enamel insulated wire, and transformer primary side separates coiling with secondary, magnet wire insulation intensity is not less than AC7500V, transformator, input filter module, high isolation control module, energy-storage module, output rectification module, output filtration module is all laid on pcb board, this utility model structural principle is simple, strong anti-interference performance, ensure that input and output reach the high-isolating of more than 10000V, leakage current is substantially zeroed, thus meet the occasion that power module is had superelevation insulation request.

Description

A kind of high isolation DC-DC power module

Technical field:

This utility model relates to a kind of power module, particularly relates to a kind of high isolation DC-DC power source Module.

Background technology:

In a lot of industry requirement DC-DC power module it is necessary to have the highest isolation voltage, simultaneously The special industries such as leakage current is less than 0.5 milliampere, particularly medical, isolation voltage requires big In 6000V, even reach 10000V, meet the requirement of industry, its isolation of conventional power source module Pressure the most relatively low, its isolation of standard isolated DC/DC changer is pressure for DC500V, portion The isolation dividing general isolated DC/DC changer is pressure up to DC1000V, U.S. Vicor Its isolation of isolated DC/DC changer that company produces is pressure for AC3000V.Conventional power source mould Block, is typically built up voltage stabilizing electricity by the diode section within optocoupler and output reference chipset Road, it is pressure with outfan high isolation that traditional power module can not realize input, but at some In particular cases, need that the isolation of input and outfan is pressure reaches AC10000V's DC/DC power module product.

Utility model content:

In order to solve the problems referred to above, it is simple that this utility model provides a kind of structural principle, anti-dry Immunity can be strong, it is possible to ensures that input and output reach the high-isolating of more than 10000V, electric leakage Electric current is substantially zeroed, thus meets the technical side of the occasion having superelevation insulation request to power module Case:

A kind of high isolation DC-DC power module, including transformator, input filter module, high every From control module, energy-storage module, output rectification module, output filtration module, transformator uses Annular transformator, is cased with insulation sleeve outside the magnetic core of transformator, transformer coiling uses high absolutely Edge enamel-covered wire, and transformer primary side and secondary separate coiling, magnet wire insulation intensity is not less than AC7500V, transformator, input filter module, high isolation control module, energy-storage module, defeated Go out rectification module, output filtration module is all laid on pcb board, and high isolation control module is respectively Connect input filter film, energy-storage module, transformator, transformator and output rectification module, output Filtration module electromagnetic coupled.

As preferably, high isolation control module includes control chip, photoelectrical coupler, controls Chip includes COMP end, FB end, ISNS end, RT end, GND end, VOUT end, VDD End, VREF end, wherein access described photoelectrical coupler, ISNS between COMP end and FB end End connects the filter circuit of resistance A, electric capacity A composition, GND end ground connection, and VOUT end connects field Effect transistor, vdd terminal connects auxiliary circuit, and VREF end passes through electric capacity B ground connection, and field is imitated Transistor is answered to connect resistance B ground connection, resistance B parallel filtering circuit.

As preferably, with monolayer polyimides glue between transformer primary side winding and vice-side winding Band carries out insulation processing coiling 2 layers, and its monolayer Kapton Tape dielectric strength is not less than AV12000V。

As preferably, pcb board thickness is 2mm, between its input and outfan pressure away from From being designed as 14mm, between its pressure distance, it is additionally provided with clearance hole.

The beneficial effects of the utility model are:

(1) this utility model structural principle is simple, strong anti-interference performance, it is possible to ensure input Output reaches the high-isolating of more than 10000V, and leakage current is substantially zeroed, Thus meet the occasion that power module is had superelevation insulation request.

(2) this utility model sheathed insulation sleeve outside the magnetic core of transformator, and transformator Primary and secondary side enamel-covered wire separates coiling, simultaneously the modules on pcb board Physics completely cuts off, it is possible to fully meet superelevation insulation request.

Accompanying drawing illustrates:

Fig. 1 is pcb board structural representation of the present utility model；

Fig. 2 is Transformer core structure figure of the present utility model；

Fig. 3 is transformer coiling schematic diagram of the present utility model；

Fig. 4 is high isolation control module schematic diagram of the present utility model.

Detailed description of the invention:

For making goal of the invention of the present utility model, technical scheme and advantage clearer, below will In conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.

As Figure 1-Figure 4, a kind of high isolation DC-DC power module, including transformator 1, Input filter module 2, high isolation control module 3, energy-storage module 4, output rectification module 5, Output filtration module 6, described transformator 1 uses annular transformator, described transformator 1 Being cased with insulation sleeve 8 outside magnetic core 7, insulation sleeve 8 plays the effect of protection magnetic core 7.Insulation sleeve The electric field on 8 surfaces is evenly distributed by all pressures effect of inner core 7, thus improves insulation The electrical insulation properties of set 8, described transformator 1 coiling uses high enamel insulated wire 9, and institute Stating the former limit of transformator 1 10 and secondary 11 and separate coiling, enamel-covered wire 9 dielectric strength is not less than AC7500V, uses monolayer polyamides between transformator 1 former limit 10 winding and secondary 11 winding simultaneously Imines adhesive tape carries out insulation processing coiling 2 layers, and its monolayer Kapton Tape dielectric strength is the least In AV12000V.Described transformator 1, input filter module 2, high isolation control module 3, Energy-storage module 4, output rectification module 5, output filtration module 6 are all laid on pcb board 12, Described high isolation control module 3 connects input filter module 2, energy-storage module 4, transformation respectively Device 1, described transformator 1 and described output rectification module 5, described output filtration module 6 electricity Magnetic coupling, wherein, energy-storage module 4, when normal power supply, stores energy, the energy that will store Supply rear class main circuit；Input filter module 2 is used for reducing input ripple current, and suppresses high Frequently harmonic wave；DC voltage after rectification is filtered by output filtration module 6, improves power supply defeated The quality gone out.Pcb board 12 thickness of the present utility model is 2mm, its input and outfan Between pressure distance be designed as 14mm, between its pressure distance, be additionally provided with clearance hole. This utility model is at the outside sheathed insulation sleeve of magnetic core of transformator, and the primary and secondary side of transformator Enamel-covered wire separates coiling, and the complete physics of modules on pcb board cuts off simultaneously, it is possible to complete Full up sufficient superelevation insulation request.

In the present embodiment, high isolation control module 3 includes control chip 13, photoelectrical coupler 14, described control chip 13 include COMP end, FB end, ISNS end, RT end, GND end, VOUT end, vdd terminal, VREF end, wherein access described photoelectricity between COMP end and FB end Bonder 14, ISNS end connects the filter circuit of resistance A 1a, electric capacity A 1b composition, GND End ground connection, VOUT end connects field-effect transistor 15, and vdd terminal connects auxiliary circuit, VREF End is by electric capacity B 2b ground connection, and field-effect transistor 15 connects resistance B 2a ground connection, electricity Resistance B 2a parallel filtering circuit.Photoelectrical coupler 14 is used for realizing isolation and the transmission of signal, High isolation control module 3 controls output voltage height, makes power work in setting state.

The beneficial effects of the utility model are: this utility model structural principle is simple, anti-interference Performance is strong, it is possible to ensure that input and output reach the high-isolating of more than 10000V, electric leakage electricity Flow substantially zeroed, thus meet the occasion that power module is had superelevation insulation request；This practicality is new Type is at the outside sheathed insulation sleeve of magnetic core of transformator, and the primary and secondary side enamel-covered wire of transformator divides Opening coiling, the complete physics of modules on pcb board cuts off simultaneously, it is possible to fully meet super High isolation requirement.

Above-described embodiment is preferred embodiment of the present utility model, is not to this utility model The restriction of technical scheme, as long as can be on the basis of above-described embodiment without creative work The technical scheme of upper realization, is regarded as falling into the rights protection scope of this utility model patent In.

Claims (4)

1. a high isolation DC-DC power module, it is characterised in that: include transformator, input filter Mode block, high isolation control module, energy-storage module, output rectification module, output filtration module, Described transformator uses annular transformator, is cased with insulation sleeve outside the magnetic core of described transformator, Described transformer coiling use high enamel insulated wire, and described transformer primary side and secondary separate around Line, magnet wire insulation intensity be not less than AC7500V, described transformator, input filter module, High isolation control module, energy-storage module, output rectification module, output filtration module are all laid in On pcb board, described high isolation control module connect respectively input filter module, energy-storage module, Transformator, described transformator and described output rectification module, described output filtration module electromagnetism coupling Close.

A kind of high isolation DC-DC power module the most according to claim 1, it is characterised in that: Described high isolation control module includes that control chip, photoelectrical coupler, described control chip include COMP end, FB end, ISNS end, RT end, GND end, VOUT end, vdd terminal, VREF end, Wherein access described photoelectrical coupler between COMP end and FB end, ISNS end connect resistance A, The filter circuit of electric capacity A composition, GND end ground connection, VOUT end connects field-effect transistor, VDD End connects auxiliary circuit, and VREF end passes through electric capacity B ground connection, and field-effect transistor connects resistance B And ground connection, resistance B parallel filtering circuit.

A kind of high isolation DC-DC power module the most according to claim 1, it is characterised in that: Insulate with monolayer Kapton Tape between described transformer primary side winding and vice-side winding Processing coiling 2 layers, its monolayer Kapton Tape dielectric strength is not less than AV12000V.

A kind of high isolation DC-DC power module the most according to claim 1, it is characterised in that: Described pcb board thickness is 2mm, and the pressure distance between its input and outfan is designed as 14mm, is additionally provided with clearance hole between its pressure distance.