CN106452033A - High-power transmitter based on phase-shifting control - Google Patents
High-power transmitter based on phase-shifting control Download PDFInfo
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- CN106452033A CN106452033A CN201611046755.0A CN201611046755A CN106452033A CN 106452033 A CN106452033 A CN 106452033A CN 201611046755 A CN201611046755 A CN 201611046755A CN 106452033 A CN106452033 A CN 106452033A
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- China
- Prior art keywords
- module
- absorption
- overcurrent
- switching tube
- shifting control
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
Abstract
The invention discloses a high-power transmitter based on phase-shifting control. The high-power transmitter comprises a direct current power supply, a CPLD (Complex Programmable Logic Device), an MCU (Microprogrammed Control Unit), a level conversion module, an isolated driver module, an IGBT (Insulated Gate Bipolar Translator) inverter module, two power supply electrodes, an overcurrent and overvoltage protection module, an absorption capacitor and an RC absorption module, wherein the MCU controls a driving waveform generated by the CPLD through phase shift; by setting dead time, the IGBT module provides heavy current generated by more time discharge peak voltage when conduction is mutated into shutoff or the shutoff is mutated into the conduction, thereby reducing an amplitude of peak voltage, reducing the impact of a peak voltage value on the direct current power supply, and ensuring the working safety of the IGBT inverter module; a received matched with the transmitter is enabled to acquire stable data, and the observation speed is improved.
Description
Technical field
The present invention relates to a kind of induced polarization method prospecting instrument, and in particular to a kind of high-power transmitter based on phase shifting control.
Background technology
Electrical prospecting be according to the electromagnetic property of each rocks or ore body in the earth's crust (as electric conductivity, magnetic conductivity, dielectric
Property) and electrochemical properties difference, by the room and time regularity of distribution to artificial or natural electric field or electromagnetic field, seek
Dissimilar useful mineral deposit is looked for, find out geological structure and solves a kind of geophysical exploration method of geological problem, conventional electricity
Method exploitation method presses the classification of electromagnetic field time response, can be divided into DC electrical method, AC electrical method and transient method.
Transmitter feeds stabling current by current electrode into underground or specimen, to set up stable artificial electric field, connects
Receipts machine measures the Changing Pattern of the electric field by measuring electrode to ask for the apparent resistivity of subterranean strata, draws apparent resistivity curve
Or profile, so as to understand construction and the spatial character of rock stratum.
With the development of national science technology, China physical prospecting industry is progressively marched toward deep prospecting by shallow exploration, according to electricity
Method exploration principle, will realize deep resource exploration needs larger transmission pole span, sending pole span once becoming big, can only improve transmitter
Transmit power, just can guarantee that receiver measures stabilization signal, correctly reflect the physical property of geologic body.Swash electricity in the market
Instrument transmitter also just develops towards high voltage, high current, powerful direction, but all suffers from one and use bottleneck, i.e., in low-resistance
Area and the larger high resistant area of induction reactance can not send high current and high voltage, because the earth exist induction reactance when sending signal occur prominent
Induction electromotive force will necessarily be produced during change, so as to produce peak voltage, cause transmitter over voltage alarm, in some instances it may even be possible to burn out transmission
The inversion module of machine, cannot finally be operated.Thus cause transmitter that deep prospecting work can not be completed, make making for transmitter
Regional limitation is received with scope.
Content of the invention
The main object of the present invention is to provide a kind of high-power transmitter based on phase shifting control, it is intended to solve existing big
Power transmitter easy over voltage alarm or the problem for burning out when high current and high voltage is sent.
For achieving the above object, the present invention proposes a kind of high-power transmitter based on phase shifting control, including：
DC source, for providing high-power input current；
CPLD, for producing drive waveforms；
MCU, produces with the drive waveforms for setting Dead Time for CPLD described in phase shifting control；
Level switch module, for lifting the level of the drive waveforms；
Isolation drive module, for carrying out electromagnetic isolation by the drive waveforms after amplification；
IGBT inversion module, for being reverse into AC signal output by input current direct current signal；
Two current electrodes, located at the AC signal outfan, connection the earth, the induction electromotive force that the earth is produced can lead to
Cross in the current electrode entrance IGBT inversion module and cause overvoltage；
Overcurrent and overvoltage protective module, for detecting electric current and the voltage of the IGBT inversion module, and turns off described
IGBT inversion module；
One Absorption Capacitance, is connected in parallel on the DC source two ends；
RC absorption module, for absorbing the overvoltage.
Preferably, the level switch module includes the first level switch module and second electrical level modular converter；Described every
Include the first isolation drive module and the second isolation drive module from drive module；The overcurrent and overvoltage protective module includes first
Overcurrent and overvoltage protective module and the second overcurrent and overvoltage protective module；The IGBT inversion module includes that first switch pipe, second open
The unidirectional current is connected in parallel on after Guan Guan, the 3rd switching tube and the 4th switching tube, the first switch pipe and the series connection of second switch pipe
Source two ends, and the grid of the first switch pipe and second switch pipe connects first overcurrent and overvoltage protective module, described the
The DC source two ends, and the 3rd switching tube and the 4th switching tube are connected in parallel on after three switching tubes and the series connection of the 4th switching tube
Grid connect second overcurrent and overvoltage protective module.
Preferably, the CPLD produces two groups of drive waveforms, and each group of two drive waveforms are 180 ° of complementary square waves, the
Drive waveforms described in one pass sequentially through first level switch module, the first isolation drive module, the first over-current over-voltage protection
Module is transmitted separately to the first switch pipe and second switch pipe, and drive waveforms described in second group pass sequentially through the described second electricity
Flat modular converter, the second isolation drive module, the second overcurrent and overvoltage protective module are transmitted separately to the 3rd switching tube and the 4th and open
Guan Guan.
Preferably, the RC absorption module includes a RC absorption module, the 2nd RC absorption module, the 3rd RC absorption module
With the 4th RC absorption module, a RC absorption module is in parallel with first switch pipe, the 2nd RC absorption module and second
Paralleled power switches, the 3rd RC absorption module and the 3rd paralleled power switches, the 4th RC absorption module and described
Four paralleled power switches.
Preferably, the RC absorption module includes an Absorption Capacitance and the current-limiting resistance that connects.
Preferably, the overcurrent and overvoltage protective module includes voltage sensor and current sensor, in order to detect by institute
The voltage and current of IGBT inversion module is stated, the overcurrent and overvoltage protective module also detects the maximum work of the IGBT inversion module
Make voltage and maximum operating currenbt, when the voltage by the IGBT inversion module exceedes the maximum work of the IGBT inversion module
When making voltage, or when exceeding the maximum operating currenbt of the IGBT inversion module by the electric current of the IGBT inversion module, institute
State overcurrent and overvoltage protective module and control the drive waveforms that the CPLD is produced to become low level and the IGBT inversion module is turned off.
Preferably, the MCU adopts STM32 single-chip microcomputer.
In technical solution of the present invention, the drive waveforms that the MCU is produced by phase shifting control CPLD, during by arranging dead band
Between make the IGBT module from conducting to turn off or from turn off undergo mutation to conducting when, providing more times releases spike
The high current that voltage is produced, so as to reduce the amplitude of peak voltage, also reduces the impact of the peak voltage value to DC source, really
IGBT inversion module work safety is protected, has been made the receiver for using cooperatively with transmitter that stable data are collected, improve observation
Speed.It is to absorb peak voltage simply by capacitance-resistance compared to traditional transmitter, assimilation effect is poor, and resistance heating is tight
Weight, power requirement height, capacitance voltage class requirement height, easily puncture electric capacity, the big work(based on phase shifting control proposed by the present invention
Rate transmitter ensure that IGBT inversion module work safety, and so that transmitter is sent due to employing Phase Shift Control Study
High-power signal, compared to traditional transmitter in order to energy absorption needs bulky capacitor inductance, present invention decreases transmitter
Volume and weight, makes transmitter easy to carry, solves the bottle that typical high power transmitter can not be used in induction reactance larger area
Neck, solves the heavy inconvenience field construction of instrument, the shortcomings of design cost is high, reliability is relatively low, is greatly promoted deep
The exploration of mineral resources.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for technology description is had to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Structure according to these accompanying drawings obtains other accompanying drawings.
The structured flowchart of the high-power transmitter based on phase shifting control that Fig. 1 is proposed for one embodiment of the invention.
The phase shifting control drive waveforms figure of the high-power transmitter based on phase shifting control that Fig. 2 is proposed for Fig. 1.
The drawing reference numeral explanation of the present invention：
| Label | Title | Label | Title |
| 1 | MCU | 8 | Second overcurrent and overvoltage protective module |
| 2 | CPLD | 9 | IGBT inversion module |
| 3 | First level switch module | 10 | RC absorption module |
| 4 | Second electrical level modular converter | Q1 | First switch pipe |
| 5 | First isolation drive module | Q2 | Second switch pipe |
| 6 | First overcurrent and overvoltage protective module | Q3 | 3rd switching tube |
| 7 | Second isolation drive module | Q4 | 4th switching tube |
| C5 | Absorption Capacitance |
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described further.Here it should be noted that for
The explanation of these embodiments is used to help understand the present invention, but does not constitute limitation of the invention.Additionally, disclosed below
As long as each embodiment of the present invention in involved technical characteristic do not constitute conflict each other and can just be mutually combined.
The present invention proposes a kind of high-power transmitter based on phase shifting control.
The structured flowchart of the high-power transmitter based on phase shifting control that Fig. 1 is proposed for one embodiment of the invention.Fig. 2 is this
Invent the phase shifting control drive waveforms figure of the high-power transmitter based on phase shifting control of embodiment proposition.
Fig. 1 to Fig. 2 is referred to, is included based on the high-power transmitter of phase shifting control：
DC source (+, -), for providing high-power input current；
CPLD (Complex Programmable Logic Device, CPLD) is used for producing drive
Dynamic waveform；
MCU (MicroControllerUnit, micro-control unit), produces with setting for CPLD described in phase shifting control
The drive waveforms of Dead Time；
Level switch module, for lifting the drive waveforms；
Isolation drive module, for carrying out electromagnetic isolation by the drive waveforms after amplification；
IGBT inversion module 9, for being reverse into AC signal output by input current direct current signal；
Two current electrodes (A, B), located at the AC signal outfan, connection the earth, the induction electromotive force that the earth is produced
Can be entered in the IGBT inversion module 9 by the current electrode and cause overvoltage；
Overcurrent and overvoltage protective module, for detecting electric current and the voltage of the IGBT inversion module, and turns off described
IGBT inversion module；
One Absorption Capacitance C5, is connected in parallel on the DC source two ends；
RC absorption module, for absorbing the overvoltage.
When electrical prospecting is carried out, the MCU sends instruction, and the CPLD receives instruction, and arrange Dead Time t1,
T2, t3, the drive waveforms to producing carry out phase shifting control, send drive waveforms, and the drive waveforms high level or low level are respectively
Open IGBT inversion module or turn off IGBT inversion module, level switch module by drive waveforms level lifting, for control every
From drive module, electromagnetic isolation is carried out to high level and low level, it is ensured that MCU and CPLD do not receive electromagnetic interference, the overcurrent-overvoltage
Drive signal is sent to IGBT inversion module by protection module, is driven IGBT inversion module to carry out inversion to waveform, is produced stable
Alternating current feeds the earth by the current electrode.
As the earth has very big induction reactance, when electrodes of A, B access the earth are powered, induction electromotive force can be caused
Overvoltage, when IGBT inversion module is turned off, the overvoltage produces very big electric current and flows back in whole circuit, impacts DC source,
Make which that peak voltage is produced, endanger whole circuit.
The drive waveforms that the MCU is produced by phase shifting control CPLD, make the IGBT module by arranging Dead Time
From conducting to turn off or from turn off undergo mutation to conducting when, provide more times release peak voltage generation big electricity
Stream, so as to reduce the amplitude of peak voltage, also reduces the impact of the peak voltage value to DC source, it is ensured that IGBT inversion mould
Block work safety, is made the receiver for being used cooperatively with transmitter collect stable data, improves observation speed.
It is to absorb peak voltage simply by capacitance-resistance compared to traditional transmitter, assimilation effect is poor, and resistance is sent out
Heat is serious, power requirement height, capacitance voltage class requirement height, easily punctures electric capacity, proposed by the present invention based on phase shifting control
High-power transmitter ensure that IGBT inversion module work safety, and enable transmitter due to employing Phase Shift Control Study
High-power signal is sent, compared to traditional transmitter in order to energy absorption needs bulky capacitor inductance, present invention decreases sending
The volume and weight of machine, makes transmitter easy to carry, and solving typical high power transmitter can not use in induction reactance larger area
Bottleneck, solve the heavy inconvenience field construction of instrument, the shortcomings of design cost is high, reliability is relatively low, be greatly promoted
The exploration of deep mineral resources.
Further, the level switch module includes the first level switch module 3 and second electrical level modular converter 4；Institute
Stating isolation drive module includes the first isolation drive module 5 and the second isolation drive module 7；The overcurrent and overvoltage protective module bag
Include the first overcurrent and overvoltage protective module 6 and the second overcurrent and overvoltage protective module 8；The IGBT inversion module includes first switch pipe
Q1, second switch pipe Q2, the 3rd switching tube Q3 and the 4th switching tube Q4, the first switch pipe Q1 and second switch pipe Q2 series connection
After be connected in parallel on the DC source two ends, and the grid of the first switch pipe Q1 and second switch pipe Q2 connects first mistake
Stream overvoltage protective module, is connected in parallel on the DC source two ends after the 3rd switching tube Q3 and the 4th switching tube Q4 series connection, and
The grid of the 3rd switching tube Q3 and the 4th switching tube Q4 connects second overcurrent and overvoltage protective module.
The IGBT inversion module 9 is opened in high level, is turned off in low level.
Further, the CPLD produces two groups of drive waveforms, and each group of two drive waveforms are 180 ° of complementary square waves,
Drive waveforms G1, G2 described in first group pass sequentially through first level switch module, the first isolation drive module, the first excessively stream
Overvoltage protective module is transmitted separately to the first switch pipe Q1 and second switch pipe Q2, drive waveforms G3, G4 described in second group
Pass sequentially through the second electrical level modular converter, the second isolation drive module, the second overcurrent and overvoltage protective module to be transmitted separately to
3rd switching tube Q3 and the 4th switching tube Q4.
With reference to Fig. 2, when two groups of drive waveforms are G-1, G-3, G-2, G-4 drive waveforms, the IGBT inversion mould
Electric current in block 9 has four kinds of flow directions：(1) first switch pipe Q1 and the 3rd switching tube Q3 conducting, second switch pipe Q2 and the 4th are opened
Close pipe Q4 to turn off, the IGBT module forward conduction, electric current flows to B by electrodes of A；(2) first switch pipe Q1 and the 3rd is opened
Close pipe Q3 shutoff, second switch pipe Q2 and the 4th switching tube Q4 to turn on, the IGBT module reverse-conducting, electric current is by current electrode
B flows to A.After Phase Shift Control Study, t1 and t3 are not equal to zero, make to close during first switch pipe Q1 and the 3rd switching tube Q3 difference
Disconnected or conducting, makes second switch pipe Q2 and the 4th switching tube Q4 not simultaneously turn off or turn on, when electrodes of A, B enter overvoltage
When producing peak voltage, protect IGBT module not breakdown.
Further, the RC absorption module includes that a RC absorption module, the 2nd RC absorption module, the 3rd RC absorb mould
Block and the 4th RC absorption module, a RC absorption module is in parallel with first switch pipe Q1, the 2nd RC absorption module with
Second switch pipe Q2 parallel connection, the 3rd RC absorption module is in parallel with the 3rd switching tube Q3, the 4th RC absorption module
In parallel with the 4th switching tube Q4.
Further, the RC absorption module include connect an Absorption Capacitance and a current-limiting resistance (C1R1, C2R2,
C3R3、C4R4).The Absorption Capacitance and current-limiting resistance composition resistance capaciting absorpting circuit, to turning on and off for IGBT inversion module 9
Shield.
Further, the overcurrent and overvoltage protective module includes voltage sensor, in order to detect the value of the overvoltage, institute
The maximum working voltage value that overcurrent and overvoltage protective module also detects the IGBT inversion module 9 is stated, when the value of the overvoltage surpasses
Cross the IGBT inversion module maximum working voltage value when, the overcurrent and overvoltage protective module controls the drive that the CPLD is produced
Dynamic waveform becomes low level and turns off the IGBT inversion module 9.
Specifically, the MCU adopts STM32 single-chip microcomputer.STM32 chip has the advantages that low-power consumption, big integrated level.
The preferred embodiments of the present invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, every at this
Under the inventive concept of invention, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/use indirectly
It is included in the scope of patent protection of the present invention in other related technical fields.
Claims (7)
1. a kind of high-power signal transmitter based on phase shifting control, it is characterised in that include：
DC source, for providing high-power input current；
CPLD, for producing drive waveforms；
MCU, produces with the drive waveforms for setting Dead Time for CPLD described in phase shifting control；
Level switch module, for lifting the level of the drive waveforms；
Isolation drive module, for carrying out electromagnetic isolation by the drive waveforms after amplification；
IGBT inversion module, for being reverse into AC signal output by input current direct current signal；
Two current electrodes, located at the AC signal outfan, connection the earth, the induction electromotive force that the earth is produced can pass through institute
State in the current electrode entrance IGBT inversion module and cause overvoltage；
Overcurrent and overvoltage protective module, for detecting electric current and the voltage of the IGBT inversion module, and it is inverse to turn off the IGBT
Become module；
One Absorption Capacitance, is connected in parallel on the DC source two ends；
RC absorption module, for absorbing the overvoltage.
2. the high-power transmitter based on phase shifting control as claimed in claim 1, it is characterised in that
The level switch module includes the first level switch module and second electrical level modular converter；
The isolation drive module includes the first isolation drive module and the second isolation drive module；
The overcurrent and overvoltage protective module includes the first overcurrent and overvoltage protective module and the second overcurrent and overvoltage protective module；
The IGBT inversion module includes first switch pipe, second switch pipe, the 3rd switching tube and the 4th switching tube, described first
The DC source two ends are connected in parallel on after switching tube and the series connection of second switch pipe, and the first switch pipe and second switch pipe
Grid connects first overcurrent and overvoltage protective module, is connected in parallel on described straight after the 3rd switching tube and the series connection of the 4th switching tube
Stream both ends of power, and the grid of the 3rd switching tube and the 4th switching tube connects second overcurrent and overvoltage protective module.
3. the high-power transmitter based on phase shifting control as claimed in claim 2, it is characterised in that the CPLD produces two groups
Drive waveforms, each group of two drive waveforms are 1800Complementary square wave, drive waveforms described in first pass sequentially through described first
Level switch module, the first isolation drive module, the first overcurrent and overvoltage protective module be transmitted separately to the first switch pipe and
Second switch pipe, drive waveforms described in second group pass sequentially through the second electrical level modular converter, the second isolation drive module,
Two overcurrent and overvoltage protective modules are transmitted separately to the 3rd switching tube and the 4th switching tube.
4. the high-power transmitter based on phase shifting control as claimed in claim 2, it is characterised in that the RC absorption module bag
A RC absorption module, the 2nd RC absorption module, the 3rd RC absorption module and the 4th RC absorption module is included, a RC absorbs
Module is in parallel with first switch pipe, and the 2nd RC absorption module is in parallel with second switch pipe, the 3rd RC absorption module with
3rd paralleled power switches, the 4th RC absorption module and the 4th paralleled power switches.
5. the high-power transmitter based on phase shifting control as claimed in claim 1, it is characterised in that the RC absorption module bag
Include an Absorption Capacitance and a current-limiting resistance of series connection.
6. the high-power transmitter based on phase shifting control as claimed in claim 1, it is characterised in that the over-current over-voltage protection
Module includes voltage sensor and current sensor, in order to detect the voltage and current by the IGBT inversion module, described
Overcurrent and overvoltage protective module also detects the maximum working voltage of the IGBT inversion module and maximum operating currenbt, when by described
When the voltage of IGBT inversion module exceedes the maximum working voltage of the IGBT inversion module, or pass through the IGBT inversion module
Electric current exceed the IGBT inversion module maximum operating currenbt when, the overcurrent and overvoltage protective module controls the CPLD to produce
Raw drive waveforms become low level and turn off the IGBT inversion module.
7. the high-power transmitter based on phase shifting control as claimed in claim 1, it is characterised in that the MCU adopts STM32
Single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611046755.0A CN106452033A (en) | 2016-11-23 | 2016-11-23 | High-power transmitter based on phase-shifting control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611046755.0A CN106452033A (en) | 2016-11-23 | 2016-11-23 | High-power transmitter based on phase-shifting control |
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| Publication Number | Publication Date |
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| CN106452033A true CN106452033A (en) | 2017-02-22 |
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ID=58219301
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| CN201611046755.0A Pending CN106452033A (en) | 2016-11-23 | 2016-11-23 | High-power transmitter based on phase-shifting control |
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| CN101604916A (en) * | 2009-07-07 | 2009-12-16 | 南京航空航天大学 | Based on the pi-type auxiliary network Zero-voltage switch full-bridge direct current converter |
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| CN102721982A (en) * | 2012-06-26 | 2012-10-10 | 中国科学院电工研究所 | Ground electromagnetic prospecting method based on SPSP (Spread Spectrum) coding technology and detection system thereof |
| CN204556856U (en) * | 2015-03-12 | 2015-08-12 | 北京中矿大地地球探测工程技术有限公司 | A kind of transient electromagnetic method reconnoitres the radiating circuit of transmitter in equipment |
| CN105259584A (en) * | 2015-10-26 | 2016-01-20 | 中国石油天然气集团公司 | Water area electric prospecting system |
| CN206283410U (en) * | 2016-11-23 | 2017-06-27 | 湖南继善高科技有限公司 | High-power transmitter based on phase shifting control |
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2016
- 2016-11-23 CN CN201611046755.0A patent/CN106452033A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101604916A (en) * | 2009-07-07 | 2009-12-16 | 南京航空航天大学 | Based on the pi-type auxiliary network Zero-voltage switch full-bridge direct current converter |
| RU2444766C2 (en) * | 2010-04-12 | 2012-03-10 | Закрытое акционерное общество "Проектно-конструкторское бюро" "РИО" | Communication system of super low frequency and extremely low frequency ranges with deeply submerged and remote objects |
| CN102721982A (en) * | 2012-06-26 | 2012-10-10 | 中国科学院电工研究所 | Ground electromagnetic prospecting method based on SPSP (Spread Spectrum) coding technology and detection system thereof |
| CN204556856U (en) * | 2015-03-12 | 2015-08-12 | 北京中矿大地地球探测工程技术有限公司 | A kind of transient electromagnetic method reconnoitres the radiating circuit of transmitter in equipment |
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Application publication date: 20170222 |
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