CN106160443B - Real-time guard device for multichannel full-bridge inverting module - Google Patents
Real-time guard device for multichannel full-bridge inverting module Download PDFInfo
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- CN106160443B CN106160443B CN201610715604.3A CN201610715604A CN106160443B CN 106160443 B CN106160443 B CN 106160443B CN 201610715604 A CN201610715604 A CN 201610715604A CN 106160443 B CN106160443 B CN 106160443B
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- module
- real
- insulated gate
- bridge inverting
- bipolar transistor
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of real-time guard device for multichannel full-bridge inverting module, including multiple real-time current detection modules, current parallel module and protection drive module, real-time current detection module is used for the electric current for detecting the first insulated gate bipolar transistor source electrode, current parallel module is used to be converted into carrying out after voltage by the electric current of multiple real-time current detection modules output in parallel, protection drive module includes comparator and drive control unit, voltage after parallel connection is sent into comparator, the output signal of comparator is sent into drive control unit, drive control unit produces the grid input signal of full-bridge inverting module.The present invention need not can be achieved with the real-time detection of multichannel full-bridge inverting blocks current per the increase current foldback circuit of full-bridge inverting module all the way, and circuit is simple, effectively increases work efficiency and stability.
Description
Technical field
The present invention relates to medical instruments field, more particularly to the real-time guard device for multichannel full-bridge inverting module.
Background technology
Existing medical X ray machine, majority using full-bridge inverting module as main inverse device, with the development of X-ray production apparatus,
X-ray production apparatus output power is improved to hundred kilowatts from several kilowatts, in order to meet complete machine power demand, it is necessary to which multichannel full-bridge is inverse
Just becoming wired in parallel work can meet the requirements, in order to ensure that full-bridge inverting module safety works, it is necessary to per full-bridge inverting all the way
Module increase current foldback circuit, cause protect circuit it is cumbersome, stability is poor, and dynamic responding speed is inadequate.
The content of the invention
Goal of the invention：The object of the present invention is to provide it is a kind of can solve defect existing in the prior art be used for multichannel
The real-time guard device of full-bridge inverting module.
Technical solution：Real-time guard device of the present invention for multichannel full-bridge inverting module, full-bridge inverting module
Including four insulated gate bipolar transistors, the drain electrode of the first insulated gate bipolar transistor connects the 3rd insulated gate bipolar crystalline substance
The drain electrode of body pipe, the source electrode of source electrode the 4th insulated gate bipolar transistor of connection of the second insulated gate bipolar transistor, first
The source electrode of insulated gate bipolar transistor connects the drain electrode of the second insulated gate bipolar transistor, the 3rd insulated gate bipolar crystal
The source electrode of pipe connects the drain electrode of the 4th insulated gate bipolar transistor, and the real-time guard device is detected including multiple real-time currents
Module, current parallel module and protection drive module, real-time current detection module are used to detect the first insulated gate bipolar crystal
The electric current of pipe source electrode, current parallel module are used to after the electric current of multiple real-time current detection modules output is converted into voltage carry out
Parallel connection, protection drive module include comparator and drive control unit, and the voltage after parallel connection is sent into comparator, the output of comparator
Signal is sent into drive control unit, and drive control unit produces the grid input signal of full-bridge inverting module.
Further, the protection drive module further includes amplifier, the output signal input amplifier of current parallel module
Input terminal, amplifier output terminal connection first resistor one end, first resistor the other end connection comparator it is anti-phase defeated
Enter end, the inverting input of comparator is also connected with one end of second resistance, and the other end connection power supply VCC of second resistance, compares
One end of the in-phase input end connection 3rd resistor of device, the other end ground connection of 3rd resistor, one end of 3rd resistor are also connected with the
One end of four resistance, the output terminal of the other end connection comparator of the 4th resistance, the output terminal connection drive control list of comparator
Member.So when the electric current flowed through in first resistor is more than the electric current flowed through in second resistance, the output level of comparator will be sent out
Raw conversion, by setting the resistance value of second resistance to set the switching threshold of comparator output level.
Further, the protection drive module further includes the first diode, and the other end of the 4th resistance connects the one or two pole
The cathode of pipe, the output terminal of the anode connection comparator of the first diode.First diode can not only prevent electric current from pouring in down a chimney, moreover it is possible to
High level is given to the in-phase input end of comparator when comparator exports high level, realizes auto-lock function, is so sent into driving
Control unit is exactly stable high level signal, so as to control the grid input signal for closing full-bridge inverting module.
Further, the protection drive module further includes and door, power supply VCC is connected with an input terminal of door, with door
Another input terminal connects the output terminal of comparator and the output terminal with door respectively, and drive control list is also connected with the output terminal of door
Member.Since comparator response speed is slower, when the high level lasting time of comparator output is shorter, auto-lock function can fail,
Therefore, increase level-one and door in comparator rear end, and be connected with the output terminal of door with another input terminal, can so realize
Auto-lock function, gives stable signal to drive control unit.
Further, the protection drive module further includes the second diode, and the anode connection of the second diode is defeated with door
Outlet, the cathode connection of the second diode and another input terminal of door.Second diode can prevent electric current from pouring in down a chimney.
Further, the current parallel module includes rectification unit, and the electric current input of real-time current detection module output is whole
The ac input end of unit is flowed, the first sampling resistor, the first sampling electricity are parallel between two DC output ends of rectification unit
Hinder output terminal of the both ends as current parallel module.
Further, the current parallel module further includes the 3rd diode, one end connection the three or two of the first sampling resistor
The anode of pole pipe, the output terminal of the cathode of the 3rd diode and the other end of the first sampling resistor as current parallel module.The
Three diodes can prevent the output current of the rectification unit on other roads from pouring in down a chimney.
Further, the current parallel module further includes the second sampling resistor, and the resistance value of the second sampling resistor is adopted for first
100~200 times of the resistance value of sample resistance, one end of the second sampling resistor connect the cathode of the 3rd diode, the second sampling resistor
One end and the second sampling resistor output terminal of the other end as current parallel module.It can be flowed through on such 3rd diode
The electric current of some strength, so as to ensure that the waveform of current parallel module output voltage does not distort.
Further, the real-time current detection module includes mutual inductor, the first insulation of one end connection of mutual inductor primary side
The source electrode of grid bipolar transistor, one end of the other end connection transformer primary side of mutual inductor primary side, transformer primary side
The other end connect one end of the first inductance, the other end of the first inductance connects one end of the first capacitance, the first capacitance it is another
The source electrode of the 3rd insulated gate bipolar transistor of end connection.So mutual inductance can be passed through for the full-bridge inverting module of super-large current
Device carries out the decay of electric current, then is detected.
Beneficial effect：The invention discloses a kind of real-time guard device for multichannel full-bridge inverting module, it is not necessary to
It can be achieved with the real-time detection of multichannel full-bridge inverting blocks current, circuit per the increase current foldback circuit of full-bridge inverting module all the way
Simply, work efficiency and stability are effectively increased.
Brief description of the drawings
Fig. 1 is the circuit diagram of the specific embodiment of the invention.
Embodiment
Present embodiment discloses a kind of real-time guard device for multichannel full-bridge inverting module, wherein there is two-way
Full-bridge inverting module, is respectively the first full-bridge inverting module 1 and the second full-bridge inverting module 2, as shown in Figure 1, the first full-bridge is inverse
Become module 1 and connect the first mutual inductor H1, the second full-bridge inverting module 2 connects the second mutual inductor H2.First mutual inductor H1 and second
Mutual inductor H2 each connects current parallel module 3, the connection protection drive module 4 of current parallel module 3.
Below by taking the first full-bridge inverting module 1 as an example, its circuit structure is introduced.First full-bridge inverting module 1 is wrapped
Four insulated gate bipolar transistors are included, the drain electrode of the first insulated gate bipolar transistor T1 connects the 3rd insulated gate bipolar crystalline substance
The drain electrode of body pipe T3, the source electrode of the second insulated gate bipolar transistor T2 connect the source of the 4th insulated gate bipolar transistor T4
Pole, the source electrode of the first insulated gate bipolar transistor T1 connect the drain electrode of the second insulated gate bipolar transistor T2, the 3rd insulation
The source electrode of grid bipolar transistor T3 connects the drain electrode of the 4th insulated gate bipolar transistor T4.First insulated gate bipolar crystal
The source electrode of pipe T1 connects one end of the first mutual inductor H1 primary sides, and the other end of the first mutual inductor H1 primary sides connects the first transformation
One end of device BY1 primary sides, the other end of the first transformer BY1 primary sides connect one end of the first inductance L1, the first inductance L1
The other end connect one end of the first capacitance C1, the other end of the first capacitance C1 connects the 3rd insulated gate bipolar transistor T3's
Source electrode.Two exchange inputs of the first rectification unit 31 in the both ends connection current parallel module 3 of first mutual inductor H1 secondary sides
End.Why one end of first mutual inductor H1 primary sides is connected to the source electrode of the first insulated gate bipolar transistor T1 here,
The source current of the first insulated gate bipolar transistor T1 need to be only detected, is because with for the moment in the first full-bridge inverting module 1
Between only the first insulated gate bipolar transistor T1 and the 4th insulated gate bipolar transistor T4 work at the same time, or second insulation
Grid bipolar transistor T2 and the 3rd insulated gate bipolar transistor T3 are worked at the same time, and concrete analysis is as follows：When the first insulated gate
When bipolar transistor T1 and the 4th insulated gate bipolar transistor T4 are worked at the same time, electric current is from the first insulated gate bipolar crystal
The drain electrode of pipe T1 flows into, and is flowed out from the source electrode of the first insulated gate bipolar transistor T1, by the first transformer BY1, the first electricity
The drain electrode of the 4th insulated gate bipolar transistor T4 is flow back into after sense L1 and the first capacitance C1, therefore, this when first insulate
The source current of grid bipolar transistor T1 and the drain current of the 4th insulated gate bipolar transistor T4 are identical a, need pair
One of which electric current is acquired；As the second insulated gate bipolar transistor T2 and the 3rd insulated gate bipolar transistor T3
When working at the same time, electric current is flowed into from the drain electrode of the 3rd insulated gate bipolar transistor T3, from the 3rd insulated gate bipolar transistor
The source electrode outflow of T3, the second insulated gate bipolar is flow back into after the first capacitance C1, the first inductance L1 and the first transformer BY1
The drain electrode of transistor T2, therefore, this when the second insulated gate bipolar transistor T2 drain current and the 3rd insulated gate it is double
The source current of bipolar transistor T3 is identical, and only one of which electric current need to be acquired；And due to first exhausted
The drain electrode of the source electrode and the second insulated gate bipolar transistor T2 of edge grid bipolar transistor T1 is connected, and therefore, insulate to first
The source current of grid bipolar transistor T1 is acquired the drain electrode electricity being equivalent to the second insulated gate bipolar transistor T2
Stream is acquired.
Second full-bridge inverting module 2 also includes four insulated gate bipolar transistors, is respectively the 5th insulated gate bipolar
Transistor T5, the 6th insulated gate bipolar transistor T6, the 7th insulated gate bipolar transistor T7 and the 8th insulated gate bipolar
Transistor T8.The structure of second full-bridge inverting module 2 is identical with the first full-bridge inverting module 1, just repeats no more here.Pentasyllabic quatrain
The source electrode of edge grid bipolar transistor T5 connects one end of the second mutual inductor H2 primary sides, the second mutual inductor H2 primary sides it is another
One end of the second transformer BY2 primary sides of end connection, the other end of the second transformer BY2 primary sides connect the one of the second inductance L2
End, the other end of the second inductance L2 connect one end of the second capacitance C2, and the other end of the second capacitance C2 connects the 7th insulated gate pair
The source electrode of bipolar transistor T7.Second rectification unit 32 in the both ends connection current parallel module 3 of second mutual inductor H2 secondary sides
Two ac input ends.
In current parallel module 3, the first sampling resistor R8 is connected in parallel on two DC output ends of the first rectification unit 31, the
One end of one sampling resistor R8 connects the anode of the 3rd diode D3, and the cathode of the 3rd diode D3 connects the second sampling resistor R9
One end, the other end of the second sampling resistor R9 connects the other end of the first sampling resistor R8.3rd sampling resistor R11 is connected in parallel on
Two DC output ends of the second rectification unit 32, one end of the 3rd sampling resistor R11 connect the anode of the 4th diode D4, the
The cathode of four diode D4 connects one end of the 4th sampling resistor R10, the 3rd sampling of other end connection of the 4th sampling resistor R10
The other end of resistance R11.Also, the other end of the second sampling resistor R9 connects the other end of the 4th sampling resistor R10.Second adopts
Output terminal of the other end of one end of sample resistance R9 and the second sampling resistor R9 as current parallel module 3.
Drive module 4 is protected to include amplifier A1, comparator B1 and door Y1 and drive control unit 41.Wherein, second adopt
The in-phase input end of the other end connection amplifier A1 of sample resistance R9, one end of the second sampling resistor R9 connects the 6th resistance R6's
One end, the inverting input of the other end connection amplifier A1 of the 6th resistance R6, the inverting input and output terminal of amplifier A1
Between be also associated with the 5th resistance R5.The output terminal of amplifier A1 is also connected with one end of first resistor R1, and first resistor R1's is another
One end of one end connection second resistance R2, the other end connection power supply VCC of second resistance R2, one end of second resistance R2 is also connected with
The inverting input of comparator B1, one end of the in-phase input end connection 3rd resistor R3 of comparator B1,3rd resistor R3's is another
One end is grounded, and one end of 3rd resistor R3 is also connected with one end of the 4th resistance R4, the other end connection the one or two of the 4th resistance R4
The cathode of pole pipe D1, the output terminal of the anode connection comparator B1 of the first diode D1, the output terminal of comparator B1 are also connected with the
One end of seven resistance R7, the other end connection of the 7th resistance R7 is with another input terminal of door Y1, an input terminal with door Y1
Power supply VCC is connected, the anode of the second diode D2, cathode connection and the door Y1 of the second diode D2 are connected with the output terminal of door Y1
Another input terminal, be also connected with drive control unit 41 with the output terminal of door Y1.Drive control unit 41 produces the first full-bridge
The grid input signal of 1 and second full-bridge inverting module 2 of inverter module.Control method in drive control unit 41 is using existing
Conventional control methods in technology, namely by control the grid input signal of full-bridge inverting module control the conducting of IGBT or
Person turns off.
Claims (9)
1. for the real-time guard device of multichannel full-bridge inverting module, full-bridge inverting module includes four insulated gate bipolar crystal
Pipe, the drain electrode of drain electrode the 3rd insulated gate bipolar transistor of connection of the first insulated gate bipolar transistor, the second insulated gate are double
The source electrode of bipolar transistor connects the source electrode of the 4th insulated gate bipolar transistor, the source electrode of the first insulated gate bipolar transistor
The drain electrode of the second insulated gate bipolar transistor is connected, the source electrode of the 3rd insulated gate bipolar transistor connects the 4th insulated gate pair
The drain electrode of bipolar transistor, it is characterised in that：Including multiple real-time current detection modules, current parallel module and protection driving mould
Block, real-time current detection module are used for the electric current for detecting the first insulated gate bipolar transistor source electrode, and current parallel module is used for
The electric current that multiple real-time current detection modules export is converted into carrying out after voltage it is in parallel, protection drive module include comparator and
Drive control unit, the voltage after parallel connection are sent into comparator, and the output signal of comparator is sent into drive control unit, drive control
Unit produces the grid input signal of full-bridge inverting module.
2. the real-time guard device according to claim 1 for multichannel full-bridge inverting module, it is characterised in that：The guarantor
Shield drive module further includes amplifier, the input terminal of the output signal input amplifier of current parallel module, the output of amplifier
One end of end connection first resistor, the inverting input of the other end connection comparator of first resistor, the anti-phase input of comparator
End is also connected with one end of second resistance, the other end connection power supply VCC of second resistance, the in-phase input end connection the 3rd of comparator
One end of resistance, the other end ground connection of 3rd resistor, one end of 3rd resistor are also connected with one end of the 4th resistance, the 4th resistance
The other end connects the output terminal of comparator, the output terminal connection drive control unit of comparator.
3. the real-time guard device according to claim 2 for multichannel full-bridge inverting module, it is characterised in that：The guarantor
Shield drive module further includes the first diode, and the other end of the 4th resistance connects the cathode of the first diode, the first diode
Anode connects the output terminal of comparator.
4. the real-time guard device according to claim 2 for multichannel full-bridge inverting module, it is characterised in that：The guarantor
Shield drive module further includes and door, is connected power supply VCC with an input terminal of door, ratio is connected respectively with another input terminal of door
Output terminal compared with the output terminal of device and with door, drive control unit is also connected with the output terminal of door.
5. the real-time guard device according to claim 4 for multichannel full-bridge inverting module, it is characterised in that：The guarantor
Shield drive module further includes the second diode, anode connection and the output terminal of door, the cathode of the second diode of the second diode
Connection and another input terminal of door.
6. the real-time guard device according to claim 1 for multichannel full-bridge inverting module, it is characterised in that：The electricity
Stream parallel module includes rectification unit, and the ac input end of the electric current input rectifying unit of real-time current detection module output is whole
The first sampling resistor is parallel between two DC output ends of stream unit, the first sampling resistor both ends are as current parallel module
Output terminal.
7. the real-time guard device according to claim 6 for multichannel full-bridge inverting module, it is characterised in that：The electricity
Stream parallel module further includes the 3rd diode, and one end of the first sampling resistor connects the anode of the 3rd diode, the 3rd diode
Cathode and the first sampling resistor output terminal of the other end as current parallel module.
8. the real-time guard device according to claim 7 for multichannel full-bridge inverting module, it is characterised in that：The electricity
Stream parallel module further includes the second sampling resistor, and the resistance value of the second sampling resistor is the 100~200 of the resistance value of the first sampling resistor
Again, the cathode of the 3rd diode of one end connection of the second sampling resistor, one end of the second sampling resistor and the second sampling resistor
Output terminal of the other end as current parallel module.
9. the real-time guard device according to claim 1 for multichannel full-bridge inverting module, it is characterised in that：The reality
When current detection module include mutual inductor, one end of mutual inductor primary side connects the source electrode of the first insulated gate bipolar transistor,
One end of the other end connection transformer primary side of mutual inductor primary side, the other end of transformer primary side connect the first inductance
One end, the other end of the first inductance connect one end of the first capacitance, and the other end of the first capacitance connects the 3rd insulated gate bipolar
The source electrode of transistor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610715604.3A CN106160443B (en) | 2016-08-24 | 2016-08-24 | Real-time guard device for multichannel full-bridge inverting module |
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|---|---|---|---|
| CN201610715604.3A CN106160443B (en) | 2016-08-24 | 2016-08-24 | Real-time guard device for multichannel full-bridge inverting module |
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| CN106160443A CN106160443A (en) | 2016-11-23 |
| CN106160443B true CN106160443B (en) | 2018-05-08 |
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| CN108683156A (en) * | 2018-04-23 | 2018-10-19 | 惠州市可立克电子有限公司 | Inverter circuit with overcurrent protection function |
| CN108377103A (en) * | 2018-04-23 | 2018-08-07 | 肇庆高新区国专科技有限公司 | Inverter circuit with overcurrent protection function |
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| CN2874915Y (en) * | 2005-12-09 | 2007-02-28 | 刘文辉 | Power control device for chain converter |
| CN102623962B (en) * | 2011-01-30 | 2015-03-25 | 深圳市航嘉驰源电气股份有限公司 | Adaptive lightning-protection surge-protection control circuit |
| CN103036214B (en) * | 2011-09-29 | 2015-07-08 | 台达电子企业管理（上海）有限公司 | Power switch series circuit and control method thereof |
| CN102629831B (en) * | 2012-04-01 | 2014-07-09 | 华为技术有限公司 | Method, circuit and device for soft switch detection |
| CN102638157A (en) * | 2012-05-02 | 2012-08-15 | 株洲南车时代电气股份有限公司 | Unit H-bridge module bypass circuit of chain type static synchronous compensator (STATCOM) |
| US9722498B2 (en) * | 2013-01-10 | 2017-08-01 | Alcatel Lucent | Control circuit for switching power converters with synchronous rectifiers |
| CN103209506B (en) * | 2013-04-25 | 2015-02-18 | 合肥云杉光电科技有限公司 | Low-voltage bypass electricity taking method for alternating current direct driving light-emitting diode (LED) and integrated circuit |
| JP6508505B2 (en) * | 2013-12-19 | 2019-05-08 | パナソニックＩｐマネジメント株式会社 | Inverter circuit |
| CN105226984A (en) * | 2015-09-29 | 2016-01-06 | 浙江大学 | The ultrasonic plastic tool power supply of pressure regulation frequency conversion grading control |
| CN206041795U (en) * | 2016-08-24 | 2017-03-22 | 南京普爱医疗设备股份有限公司 | A real -time protection device that is used for multichannel full -bridge contravariant module |
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