CN205844375U

CN205844375U - A kind of high voltage pulse generation device for Cable fault examination

Info

Publication number: CN205844375U
Application number: CN201620815093.8U
Authority: CN
Inventors: 徐峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-08-01
Filing date: 2016-08-01
Publication date: 2016-12-28
Anticipated expiration: 2026-08-01

Abstract

This utility model relates to Cable fault examination field, particularly relates to a kind of high voltage pulse generation device for Cable fault examination.This utility model by have employed add LCC Series-Parallel Resonant Converter technical method, reached ensure output electric current and voltage stability good while have again wider voltage regulation limits and the technique effect of adaptive load scope；Have employed the technical method by main controller controls drive circuit, reached to improve the technique effect that LCC Series-Parallel Resonant Converter is precisely controlled；Have employed by accessory power supply to master controller and the technical method of drive circuitry, reached the technique effect that device stable operation is powered.

Description

A kind of high voltage pulse generation device for Cable fault examination

Technical field

This utility model relates to Cable fault examination field, particularly relates to a kind of high-voltage pulse for Cable fault examination Generating means.

Background technology

China's science and technology advances steadily in recent years, and powder technology is advanced by leaps and bounds especially, in order to adapt to conveying and divide Joining the needs of high-power power, power cable line arises at the historic moment, and current China overhead transmission line and power cable line are all undertaken The significant task of transmission electric energy, power cable line, compared with overhead transmission line, has and lays that to take ground and space few, send Electricity reliability, safety is higher, and transmission losses is little, runs the advantages such as simple, convenient, so China is area, down town, people The dense districts of mouth etc., use power cable line the most in a large number, and do not use overhead transmission line as far as possible；But, along with cable run quantity The prolongation being on the increase and running the time, also bring many new problems, such as: the operation maintenance of power cable line with And fault-finding etc., it is therefore necessary to design a kind of high voltage pulse generation device that can be used for Cable fault examination.

Utility model content

Technical problem to be solved in the utility model, is the technical deficiency for above-mentioned existence, it is provided that one is used for The high voltage pulse generation device of Cable fault examination, have employed the technical method adding LCC Series-Parallel Resonant Converter, reaches Ensure output electric current and voltage stability good while have again the technology of wider voltage regulation limits and adaptive load scope to imitate Really；Have employed the technical method by main controller controls drive circuit, reached to improve LCC Series-Parallel Resonant Converter The technique effect being precisely controlled；Have employed by accessory power supply to master controller and the technical method of drive circuitry, reach Technique effect that device stable operation is powered.

For solving above-mentioned technical problem, this utility model be the technical scheme is that to include that exchange input, LCC go here and there also Connection controlled resonant converter, full-bridge inverter, load, drive circuit, master controller, accessory power supply；Exchange input is connected to LCC and goes here and there also Connection controlled resonant converter, the opposite side of LCC Series-Parallel Resonant Converter is connected to full-bridge inverter, and the opposite side of full-bridge inverter is even Receive load；The side of master controller connects drive circuit, and the opposite side of drive circuit is connected to the conversion of LCC series parallel resonance Device, the opposite side of master controller is connected to full-bridge inverter；Accessory power supply connection has drive circuit and master controller and is it Electric energy is provided.

Optimizing the technical program further, described accessory power supply includes the power supply chip U4 that model is LM1117-5, type Number it is the power supply chip U5, transformator T1, full bridge rectifier D2 of LM1117-3.3；It is whole that the secondary of transformator T1 is connected to full-bridge The input of current circuit D2, the outfan of full bridge rectifier D2 provides the power supply VCC of 15V, is simultaneously connected to power supply chip U4 Input Vin pin；The output Vout pin of power supply chip U4 provides the power vd D of 5V, is simultaneously connected to power supply chip U5 Input Vin pin；The output Vout pin of power supply chip U5 provides 3V3 power supply.

Optimize the technical program further, described master controller include STM32F051C single-chip microcomputer U1, resistance R3, R4, The crystal oscillator Y1 of R7,8MHz, electric capacity C15, C16, C17, C19, C20, C23, C24, C25, C27, inductance L1, LED LED1；Crystal oscillator The two ends of Y1 connect PF0 and the PF1 pin of single-chip microcomputer U1 respectively, are simultaneously connected with electric capacity C19 and C20；Electric capacity C19 ground connection, electric capacity C20 is connected to the VSSA pin of single-chip microcomputer U1；The VSSA pin of single-chip microcomputer U1 connects electric capacity C23, C24, C25, electric capacity C23, The other end of C24 connects the other end of inductance L1, inductance L1 and connects C25, is simultaneously connected to the VDDA pin of single-chip microcomputer U1；Monolithic VSS Yu the VDD pin of machine U1 is connected to the two ends of electric capacity C27；The VBAT pin of single-chip microcomputer U1 connects electric capacity C17, resistance R3, The other end of resistance R3 is connected to the NRST pin of single-chip microcomputer U1；VDD Yu the VSS pin of single-chip microcomputer U1 be connected to electric capacity C15, The two ends of C16, the VDD pin of single-chip microcomputer U1 is connected to the anode of LED1 also by resistance R4；The BOOT0 pin of single-chip microcomputer U1 leads to Cross resistance R7 ground connection.

Optimizing the technical program further, described drive circuit includes two IR2110 chip IC 1 and IC2；Electric capacity C12、C13、C14、C18、C21、C22、C26、C28；Current-limiting resistance R2, R5, R6, R8, R9, R10, R11, R12；Fly-wheel diode D6、D7、D8、D9、D10、D11、D12、D13；The VDD pin of IC1 and IC2 it is connected to as power filter after C12 with C13 is in parallel Electric capacity；After D7 with R5 is in parallel, the anode of D7 is connected to the LIN pin of HIN and IC2 of IC1, and by C18 ground connection；D9 with After R9 parallel connection, the anode of D9 is connected to the HIN pin of LIN and IC2 of IC1, and by C26 ground connection；Electric capacity C21 and C28 Positive pole be connected to the VCC pin of IC1 and IC2, minus earth；After D8 with R6 is in parallel, the negative electrode of D8 is connected to IC1's HO pin；After D10 with R8 is in parallel, the negative electrode of D10 is connected to the LO pin of IC1；After D12 with R11 is in parallel, by the negative electrode of D12 It is connected to the HO pin of IC2；After D13 with R12 is in parallel, the negative electrode of D13 is connected to the LO pin of IC2；The negative electrode of D6 connects to be had R2 and C14, R2 opposite side connects the VB pin of IC1, and C14 opposite side connects the VS pin of IC1；The negative electrode of D11 connect have R10 and C22, R10 opposite side connects the VB pin of IC2, and C22 opposite side connects the VS pin of IC2.

Compared with prior art, this utility model has the advantage that 1, LCC Series-Parallel Resonant Converter utilizes inductance, The effect of the resonant elements such as electric capacity, makes the curtage waveform of power switch pipe the most just become sine wave, quasi-sine-wave or local String ripple, so can make power switch pipe on or off under the conditions of no-voltage or zero current, reduces switching tube and turns on and off Time loss, improve switching frequency simultaneously, reduce switching noise, reduce EMI interference and switch stress；2, core selected by drive circuit The circuit of sheet IR2110 composition, this chip is that IR company produces, and is exclusively used in bridge circuit, is a kind of integrated chip；It is gathered around Conversion accuracy between some level and the higher advantage of density, advantageously in the control to circuit；3, use STM32F051C single-chip microcomputer is as master controller, for other kinds of single-chip microcomputer, have that pin is few, cost performance is high, Advantage low in energy consumption, that response is fast and operational precision is high.

Accompanying drawing explanation

Fig. 1 is system architecture diagram；

Fig. 2 is accessory power supply schematic diagram；

Fig. 3 is LCC Series-Parallel Resonant Converter schematic diagram；

Fig. 4 is master controller schematic diagram；

Fig. 5 is driving circuit principle figure.

In figure, 1, exchange input；2, LCC Series-Parallel Resonant Converter；3, full-bridge inverter；4, load；5, drive circuit； 6, master controller；7, accessory power supply.

Detailed description of the invention

For making the purpose of this utility model, technical scheme and advantage of greater clarity, below in conjunction with detailed description of the invention And referring to the drawings, this utility model is further described.It should be understood that these describe the most exemplary, and do not really want Limit scope of the present utility model.Additionally, in the following description, the description to known features and technology is eliminated, to avoid not Obscure concept of the present utility model necessarily.

Detailed description of the invention one: as Figure 1-5, inverse including exchange input 1, LCC Series-Parallel Resonant Converter 2, full-bridge Become device 3, load 4, drive circuit 5, master controller 6, accessory power supply 7；Exchange input 1 is connected to LCC Series-Parallel Resonant Converter The opposite side of 2, LCC Series-Parallel Resonant Converter 2 is connected to full-bridge inverter 3, and the opposite side of full-bridge inverter 3 is connected to load 4；The side of master controller 6 connects has drive circuit 5, the opposite side of drive circuit 5 to be connected to LCC Series-Parallel Resonant Converter 2, The opposite side of master controller 6 is connected to full-bridge inverter 3；Accessory power supply 7 connects to be had drive circuit 5 and master controller 6 and is It provides electric energy；Accessory power supply 7 includes the power supply chip U4 that model is LM1117-5, and model is the power supply chip of LM1117-3.3 U5, transformator T1, full bridge rectifier D2；The secondary of transformator T1 is connected to the input of full bridge rectifier D2, and full-bridge is whole The outfan of current circuit D2 provides the power supply VCC of 15V, is simultaneously connected to the input Vin pin of power supply chip U4；Power supply chip The output Vout pin of U4 provides the power vd D of 5V, is simultaneously connected to the input Vin pin of power supply chip U5；Power supply chip U5 Output Vout pin provide 3V3 power supply；Master controller 6 includes STM32F051C single-chip microcomputer U1, resistance R3, R4, R7,8MHz's Crystal oscillator Y1, electric capacity C15, C16, C17, C19, C20, C23, C24, C25, C27, inductance L1, LED LED1；The two ends of crystal oscillator Y1 Connect PF0 and the PF1 pin of single-chip microcomputer U1 respectively, be simultaneously connected with electric capacity C19 and C20；Electric capacity C19 ground connection, electric capacity C20 is connected to The VSSA pin of single-chip microcomputer U1；The VSSA pin of single-chip microcomputer U1 connects electric capacity C23, C24, C25, another of electric capacity C23, C24 End connects the other end of inductance L1, inductance L1 and connects C25, is simultaneously connected to the VDDA pin of single-chip microcomputer U1；The VSS of single-chip microcomputer U1 With the two ends that VDD pin is connected to electric capacity C27；The VBAT pin of single-chip microcomputer U1 connects electric capacity C17, resistance R3, resistance R3's The other end is connected to the NRST pin of single-chip microcomputer U1；VDD Yu the VSS pin of single-chip microcomputer U1 is connected to the two ends of electric capacity C15, C16, The VDD pin of single-chip microcomputer U1 is connected to the anode of LED1 also by resistance R4；The BOOT0 pin of single-chip microcomputer U1 is connect by resistance R7 Ground；Drive circuit 5 includes two IR2110 chip IC 1 and IC2；Electric capacity C12, C13, C14, C18, C21, C22, C26, C28； Current-limiting resistance R2, R5, R6, R8, R9, R10, R11, R12；Sustained diode 6, D7, D8, D9, D10, D11, D12, D13；C12 The VDD pin of IC1 and IC2 it is connected to as power filtering capacitor after in parallel with C13；After D7 with R5 is in parallel, by the anode of D7 even It is connected on the LIN pin of HIN and IC2 of IC1, and by C18 ground connection；After D9 with R9 is in parallel, the anode of D9 is connected to IC1's The HIN pin of LIN and IC2, and by C26 ground connection；The positive pole of electric capacity C21 with C28 is connected to the VCC of IC1 and IC2 and draws Foot, minus earth；After D8 with R6 is in parallel, the negative electrode of D8 is connected to the HO pin of IC1；After D10 with R8 is in parallel, by the moon of D10 Pole is connected to the LO pin of IC1；After D12 with R11 is in parallel, the negative electrode of D12 is connected to the HO pin of IC2；D13 with R12 is in parallel After, the negative electrode of D13 is connected to the LO pin of IC2；The negative electrode of D6 connects the VB having R2 and C14, R2 opposite side to connect IC1 and draws Foot, C14 opposite side connects the VS pin of IC1；The negative electrode of D11 connects the VB pin having R10 and C22, R10 opposite side to connect IC2, C22 opposite side connects the VS pin of IC2.

Fig. 1 is system architecture diagram, and electric energy is inputted LCC Series-Parallel Resonant Converter 2, by LCC connection in series-parallel by exchange input 1 Controlled resonant converter 2 is as the pulse power, and electric energy sends full-bridge inverter 3 to afterwards, and full-bridge inverter 3 converts electrical energy into friendship again Stream electricity inputs to load 4；Controller 6 controls drive circuit 5 by PWM modulation technology, indirectly controls the conversion of LCC series parallel resonance Device 2；Accessory power supply 7 is responsible for powering to master controller 6 and drive circuit 5.

Fig. 2 is accessory power supply 7 schematic diagram, and accessory power supply 7 have employed power supply chip U4 and U5 that block-type No. two are LM1117, The pressure reduction of LM1117 exports at 1.2V, and the secondary of transformator T1 is connected to the input of full bridge rectifier D2, full-bridge rectification electricity The outfan of road D2 provides the power supply VCC of 15V, is simultaneously connected to the input Vin pin of power supply chip U4；Power supply chip U4's Output Vout pin provides the power vd D of 5V, is simultaneously connected to the input Vin pin of power supply chip U5；Power supply chip U5's is defeated Go out Vout pin and 3V3 power supply is provided；Accessory power supply 7 can be master controller 6 and drive circuit 5 is powered.

Fig. 3 is LCC Series-Parallel Resonant Converter 2 schematic diagram, LCC Series-Parallel Resonant Converter 2 filling as the pulse power Power technology, it is possible to achieve constant-current charge, improves work efficiency；Utilize the effect of the resonant element of inductance, electric capacity, make power switch The curtage waveform of pipe becomes sinusoidal wave, quasi-sine-wave or local sinusoidal ripple, and power switch pipe so can be made in no-voltage Or on or off under the conditions of zero current, reducing loss when switching tube turns on and off, improve switching frequency simultaneously, reduction is opened Close noise, reduce EMI interference and switch stress.

Fig. 4 is master controller 6 schematic diagram, and the core of master controller 6 is STM32F051C single-chip microcomputer U1, and STM32F051C is mono- Sheet machine, for the single-chip microcomputer of other models, has that pin is few, cost performance is high, low in energy consumption, response is fast and operational precision High advantage；PA13 and the PA14 pin of single-chip microcomputer U1 is as program input port；PA9 and the PA10 pin of master controller 6 produces SPWM be used for control drive circuit 5；PA8 and the PB15 pin of master controller 6 controls full-bridge inverter by PWM control mode 3。

Fig. 5 is drive circuit 5 schematic diagram, and drive circuit 5 employs IR2110 driving chip, and this chip is that IR company produces , it is exclusively used in bridge circuit, is a kind of integrated chip；Conversion accuracy between the level that it has and higher excellent of density Point, drives the switching tube in LCC Series-Parallel Resonant Converter 2 by HO and the LO pin of IR2110 driving chip, more added with It is beneficial to the stability contorting to circuit.

This programme adds the technical method of LCC Series-Parallel Resonant Converter 2 by have employed, and has reached to ensure output electric current Wider voltage regulation limits and the technique effect of adaptive load scope is had again while good with voltage stability；Have employed and pass through Master controller 6 controls the technical method of drive circuit 5, has reached to improve and is precisely controlled LCC Series-Parallel Resonant Converter 2 Technique effect；Have employed by accessory power supply 7 to master controller 6 and the technical method of drive circuit 5 power supply, reached for dress Put the technique effect that stable operation is powered.

It should be appreciated that above-mentioned detailed description of the invention of the present utility model is used only for exemplary illustration or explains this reality By novel principle, and do not constitute restriction of the present utility model.Therefore, without departing from spirit and scope of the present utility model In the case of any modification, equivalent substitution and improvement etc. done, within should be included in protection domain of the present utility model.Additionally, This utility model claims are intended to fall into scope and border or this scope and border Whole in equivalents change and modifications example.

Claims

1. the high voltage pulse generation device for Cable fault examination, it is characterised in that: include exchange input (1), LCC string Parallel resonance changer (2), full-bridge inverter (3), load (4), drive circuit (5), master controller (6), accessory power supply (7)； Exchange input (1) is connected to LCC Series-Parallel Resonant Converter (2), and the opposite side of LCC Series-Parallel Resonant Converter (2) is connected to Full-bridge inverter (3), the opposite side of full-bridge inverter (3) is connected to load (4)；The side of master controller (6) connects driving Circuit (5), the opposite side of drive circuit (5) is connected to LCC Series-Parallel Resonant Converter (2), and the opposite side of master controller (6) is even Receive full-bridge inverter (3)；Accessory power supply (7) connects to be had drive circuit (5) and master controller (6) and provides electric energy for it.

A kind of high voltage pulse generation device for Cable fault examination the most according to claim 1, it is characterised in that: auxiliary Help power supply (7) to include power supply chip U4 that model is LM1117-5, model is the power supply chip U5 of LM1117-3.3, transformator T1, full bridge rectifier D2；The secondary of transformator T1 is connected to the input of full bridge rectifier D2, full bridge rectifier D2's Outfan provides the power supply VCC of 15V, is simultaneously connected to the input Vin pin of power supply chip U4；The output of power supply chip U4 Vout pin provides the power vd D of 5V, is simultaneously connected to the input Vin pin of power supply chip U5；The output of power supply chip U5 Vout pin provides 3V3 power supply.

A kind of high voltage pulse generation device for Cable fault examination the most according to claim 1, it is characterised in that: main Controller (6) includes STM32F051C single-chip microcomputer U1, resistance R3, R4, R7, the crystal oscillator Y1 of 8MHz, electric capacity C15, C16, C17, C19, C20, C23, C24, C25, C27, inductance L1, LED LED1；The two ends of crystal oscillator Y1 connect respectively single-chip microcomputer U1 PF0 and PF1 pin, is simultaneously connected with electric capacity C19 and C20；Electric capacity C19 ground connection, electric capacity C20 is connected to the VSSA pin of single-chip microcomputer U1；Monolithic The VSSA pin of machine U1 connects electric capacity C23, C24, C25, and the other end of electric capacity C23, C24 connects inductance L1, and inductance L1's is another One end connects C25, is simultaneously connected to the VDDA pin of single-chip microcomputer U1；VSS Yu the VDD pin of single-chip microcomputer U1 is connected to electric capacity C27 Two ends；The VBAT pin of single-chip microcomputer U1 connects electric capacity C17, resistance R3, and the other end of resistance R3 is connected to single-chip microcomputer U1's NRST pin；VDD Yu the VSS pin of single-chip microcomputer U1 is connected to the two ends of electric capacity C15, C16, and the VDD pin of single-chip microcomputer U1 is the most logical Cross resistance R4 and be connected to the anode of LED1；The BOOT0 pin of single-chip microcomputer U1 passes through resistance R7 ground connection.

A kind of high voltage pulse generation device for Cable fault examination the most according to claim 1, it is characterised in that: drive Galvanic electricity road (5) includes two IR2110 chip IC 1 and IC2；Electric capacity C12, C13, C14, C18, C21, C22, C26, C28；Limit Leakage resistance R2, R5, R6, R8, R9, R10, R11, R12；Sustained diode 6, D7, D8, D9, D10, D11, D12, D13；C12 with The VDD pin of IC1 and IC2 it is connected to as power filtering capacitor after C13 parallel connection；After D7 with R5 is in parallel, the anode of D7 is connected At the LIN pin of HIN and IC2 of IC1, and by C18 ground connection；After D9 with R9 is in parallel, the anode of D9 is connected to IC1's The HIN pin of LIN and IC2, and by C26 ground connection；The positive pole of electric capacity C21 with C28 is connected to the VCC of IC1 and IC2 and draws Foot, minus earth；After D8 with R6 is in parallel, the negative electrode of D8 is connected to the HO pin of IC1；After D10 with R8 is in parallel, by the moon of D10 Pole is connected to the LO pin of IC1；After D12 with R11 is in parallel, the negative electrode of D12 is connected to the HO pin of IC2；D13 with R12 is in parallel After, the negative electrode of D13 is connected to the LO pin of IC2；The negative electrode of D6 connects the VB having R2 and C14, R2 opposite side to connect IC1 and draws Foot, C14 opposite side connects the VS pin of IC1；The negative electrode of D11 connects the VB pin having R10 and C22, R10 opposite side to connect IC2, C22 opposite side connects the VS pin of IC2.