CN208209809U - A kind of power circuit of single-phase active arc extinguishing type short-circuit protection - Google Patents
A kind of power circuit of single-phase active arc extinguishing type short-circuit protection Download PDFInfo
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- CN208209809U CN208209809U CN201820657130.6U CN201820657130U CN208209809U CN 208209809 U CN208209809 U CN 208209809U CN 201820657130 U CN201820657130 U CN 201820657130U CN 208209809 U CN208209809 U CN 208209809U
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Abstract
The utility model discloses a kind of power circuits of single-phase active arc extinguishing type short-circuit protection, it is related to breaker technical field, in the shutdown of IGBT circuit, inputting between power grid end Lin and output loading end Lout due to the inductive load of parasitic inductance and output loading end Lout that short circuit generates, IGBT circuit both ends do not have aerial drainage circuit, the voltage at IGBT circuit both ends is caused persistently to increase, until IGBT circuit over-voltage breakdown, circuit is caused to damage, its key points of the technical solution are that including power module: power module, it is electrically connected between input power grid end Lin and output loading end Lout, and the IGBT circuit for controlling power grid on-off between input power grid end Lin and output loading end Lout；The IGBT circuit is equipped with voltage transient and inhibits pipe.The technical effect for preventing IGBT circuit because parasitic inductance and over-voltage breakdown is reached.
Description
Technical field
The utility model relates to breaker technical fields, more specifically, it relates to a kind of single-phase active arc extinguishing type short circuit
The power circuit of protective device.
Background technique
Breaker can not only connect in a power distribution system with disjunction normal duty electric current, can also disconnect short trouble electricity
Stream can timely and effectively cut off short trouble, ensure safe and stable operation of power system.
Traditional breaker is disconnected electric supply system by mechanical switch automatic trip in short circuit, due to its internal machine
The inherent characteristic of tool switch, the time for power supply system of cutting off the power is longer, usually in a few tens of milliseconds between hundreds of milliseconds, because
Short circuit place contact resistance is small, and the electric current for easily leading to current supply circuit increased dramatically, the temperature of current supply circuit conductor steeply rises, short-circuit
Point generates very strong dangerous arc spark, and the high temperature and arc electrode generated is easy to cause fire or electric shock and other safety accidents.
The electric current in current sensor Acquisition Circuit for thering is active arc extinguishing type short-circuit protection to use at present, then number
According to digitial controller is supplied to, the method for short circuit is judged whether to realize by operation, but this scheme drawback is current sense
There are conversion time, program operations to need the time for device, from the time for being shorted to the dozens or even hundreds of microsecond of cutting power supply needs.
Under normal operation, electric current is flowed out by Lin to be flowed back to by single-phase active arc extinguishing type short-circuit protection and load
Power grid.
If in positive half cycle, since long transmission line occurs in short circuit between input power grid end Lout and output loading end Nout
Parasitic inductance in distribution system can make the current energy in inductance not have bleed-off circuit, will be added in the form of a voltage single-phase
The voltage at the both ends of active arc extinguishing type short-circuit protection, IGBT circuit both ends will be increased persistently, until IGBT circuit is excessively electric
After pressure breakdown, energy feedback is to power grid, so how to prevent the breakdown of IGBT circuit is a problem to be solved.
Utility model content
The purpose of the utility model is to provide a kind of power circuits of single-phase active arc extinguishing type short-circuit protection, have anti-
Only IGBT circuit because parasitic inductance and the purpose of over-voltage breakdown.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of power circuit of single-phase active arc extinguishing type short-circuit protection, including power module are electrically connected to input electricity
It nets between end Lin and output loading end Lout, and for controlling power grid between input power grid end Lin and output loading end Lout
The IGBT circuit of on-off；The IGBT circuit include the 8th diode, the second insulated gate bipolar transistor, the 9th diode,
4th insulated gate bipolar transistor, the 12nd two-way TVS pipe and the 11st two-way TVS pipe；The cathode of 8th diode
It is connected and plus earth with input power grid end Lin；The cathode of 9th diode is connected with output loading end Lout and anode
Ground connection；The collector of second insulated gate bipolar transistor and the cathode of the 8th diode couple, emitter ground connection；Institute
The cathode of the collector and the 9th diode of stating the 4th insulated gate bipolar transistor couples, emitter ground connection；The IGBT
Circuit is equipped with voltage transient and inhibits pipe；It includes the 7th two-way TVS pipe, the 7th two-way TVS that the voltage transient, which inhibits pipe,
One end of pipe is electrically connected with input power grid end Lin, and the other end is connected with output loading end Lout.
By using above scheme, in normal work, electric current is issued double by the second insulated gate by input power grid end Lin
Power grid is flowed back in bipolar transistor, the 9th diode and load, and when electric current is reversed, electric current is through overload, the 4th insulated gate bipolar
Transistor npn npn and the 8th diode flow back to power grid, and structure is simply exquisite.
It is inductive load when off for IGBT circuit by inhibiting to manage in IGBT circuit both ends shunt voltage transient state
Aerial drainage circuit is provided, the voltage at clamper IGBT circuit both ends prevents its over-voltage breakdown；It is also negative with perception that voltage transient, which inhibits pipe,
When load, when shutdown, provide aerial drainage circuit, protection IGBT circuit will not over-voltage breakdown, improve reliability.
Preferably, it further includes the 4th two-way TVS pipe with the 7th two-way TVS pipe coupled in series that the voltage transient, which inhibits pipe,
With the tenth two-way TVS pipe with the 4th two-way TVS pipe coupled in series, the other end of the tenth bilateral diode and output loading
Hold Lout electrical connection.
By using above scheme, is connected by three two-way TVS pipes, increase the reversed receiving of three two-way TVS pipes
Value.
Preferably, the IGBT circuit is equipped with the first fast restoring circuit, the first fast restoring circuit includes that third is fast
Recovery diode and with concatenated 5th diode of third fast recovery diode, the cathode of the third fast recovery diode with it is defeated
Enter power grid end Lin electrical connection, the cathode of the 5th diode and the gate pole of the second insulated gate bipolar transistor couple.
By using above scheme, when the voltage by being added in IGBT circuit both ends becomes reversed by forward direction, the response time one
As it is very short, and it is opposite by reversely becoming forward direction when, the time is relatively long.Pass through the first fast recovery electricity of connecting on IGBT circuit
Road, since the base area of fast recovery diode is very thin, reverse recovery charge very little, the reverse recovery time of the fast recovery diode
Shorter, forward voltage drop is lower, and breakdown reverse voltage is higher, and the 5th diode can prevent the electricity in the circuit of control IGBT circuit
It flows into the first fast restoring circuit.
Preferably, the first fast restoring circuit further includes the second of anode and the cathode coupling of third fast recovery diode
First fast recovery diode of the anode coupling of fast recovery diode and cathode and the second fast recovery diode, described first is fast extensive
The anode of multiple diode is coupled with the anode of the 5th diode.
Reversely holding for fast recovery diode is increased by three fast recovery diodes of connecting by using above scheme
It is worth, guarantees the security performance for ensuring circuit while backward voltage recovery time.
Preferably, being additionally provided with the second fast restoring circuit on the IGBT circuit, one end of the second fast restoring circuit is leaned on
Nearly output loading end Lout, the other end and the 4th insulated gate bipolar transistor couple, and the second fast restoring circuit includes
The positive coupling of cathode and the 16th fast recovery diode of output loading end Lout coupling, cathode and the 16th fast recovery diode
The 14th fast recovery diode and anode of the 15th fast recovery diode, cathode and the coupling of the 15th fast recovery diode that connect
With the 18th diode of the 14th fast recovery diode coupling, the cathode and the 4th insulated gate bipolar of the 18th diode
The gate pole of transistor npn npn couples.
It is first extensive fastly by connecting respectively in input power grid end Lin and output loading end Lout by using above scheme
Compound circuit and the second fast restoring circuit, can be respectively to input power grid end Lin and output loading end Lout in input AC electricity
Carry out the fast quick-recovery of backward voltage.
Preferably, the gate pole of the second insulated gate bipolar transistor is coupled with the 12nd two-way TVS pipe, described 12nd pair
It is grounded and is arranged to the other end of TVS pipe, the gate pole of the 4th insulated gate bipolar transistor is coupled with the 11st two-way TVS
The other end of pipe, the 11st two-way TVS pipe is grounded setting.
By using above scheme, the 12nd two-way TVS pipe and the 11st two-way TVS pipe cooperation voltage transient inhibit pipe point
It is other that double protection, the second insulated gate are played to the second insulated gate bipolar transistor and the 4th insulated gate bipolar transistor
Bipolar junction transistor and the 4th insulated gate bipolar transistor both ends are further because of the voltage that IGBT circuit turns off and generates
It shunts.
In conclusion the utility model has the following beneficial effects:
1. the voltage aerial drainage that the utility model inhibits the shutdown of Guan Laiwei IGBT circuit because to generate by setting voltage transient, prevents
Only IGBT circuit over-voltage breakdown；
2. the voltage reversal that the utility model IGBT circuit guarantees IGBT circuit both ends by setting fast recovery diode
Fast quick-recovery；3. the utility model by input power grid end Lin and output loading end Lout be respectively set fast restoring circuit come
Guarantee that input power grid end Lin and output loading end Lout are able to carry out reversed fast quick-recovery when input AC electricity.
Detailed description of the invention
Fig. 1 is integrally-built circuit diagram in embodiment.
In figure, 1, IGBT circuit；D8, the 8th diode；D9, the 9th diode；Q2, the second insulated gate bipolar crystal
Pipe；Q4, the 4th insulated gate bipolar transistor；D11, the 11st two-way TVS pipe；D12, the 12nd two-way TVS pipe；2, voltage wink
State inhibits pipe；D4, the 4th two-way TVS pipe；D7, the 7th two-way TVS pipe；D10, the tenth two-way TVS pipe；3, the first fast recovery electricity
Road；D1, the first fast recovery diode；D2, the second fast recovery diode；The fast revovery diode of D3, third；D5, the 5th diode；
4, the second fast restoring circuit；D14, the 14th fast recovery diode；D15, the 15th fast recovery diode；It is D16, the 16th fast extensive
Multiple diode；D18, the 18th diode.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.The wherein identical attached drawing of identical components
Label indicates.It should be noted that word "front", "rear" used in the following description, "left", "right", "up" and "down" refer to
It is the direction in attached drawing, word " bottom surface " and " top surface ", "inner" and "outside" are referred respectively to towards or away from particular elements geometry
The direction at center.
Embodiment: a kind of power circuit of single-phase active arc extinguishing type short-circuit protection, including IGBT circuit 1, voltage wink
State inhibits pipe 2, the first fast restoring circuit 3 and the second fast restoring circuit 4, and voltage transient inhibits pipe 2 in parallel with IGBT circuit 1.
IGBT circuit 1 includes the 8th diode D8, the 9th diode D9, the second insulated gate bipolar transistor Q2, the 4th
Insulated gate bipolar transistor Q4, the 12nd two-way two-way TVS pipe D11 of TVS pipe D12 and the 11st.8th diode D8's is negative
Pole and input power grid end Lin coupling, plus earth, the cathode and output loading end Lout of the 9th diode D9 couple, just
Pole ground connection.8th diode D8 and the 9th diode D9 is serially connected.
Second insulated gate bipolar transistor Q2 and the 4th insulated gate bipolar transistor Q4 respectively with the 8th diode D8
It is parallel with one another with the 9th diode D9, the collector of the second insulated gate bipolar transistor Q2 and input power grid end Lin coupling,
Emitter ground connection, the collector and output loading end Lout of the 4th insulated gate bipolar transistor Q4 couple, emitter ground connection.
The 12nd two-way two-way TVS pipe D11 of TVS pipe D12 and the 11st respectively with the second insulated gate bipolar transistor Q2
It is parallel with one another with the 4th insulated gate bipolar transistor Q4, one end of the 12nd two-way TVS pipe D12 and the second insulated gate bipolar
Transistor Q2 electrical connection, other end ground connection, one end of the 11st two-way TVS pipe D11 and the second insulated gate bipolar transistor
Q2 coupling, other end ground connection.
When circuit works normally, electric current is issued from input power grid end Lin, at this time the second insulated gate bipolar transistor Q2
Collector and gate pole between be forward voltage, so conducting；The collector and gate pole of 4th insulated gate bipolar transistor Q4
Between be backward voltage, so shutdown.Electric current flows through the second insulated gate bipolar transistor Q2 in this way, then passes through the 9th 2 pole
Pipe D9 from output loading end Lout flow out, eventually flow into load, then flow back to power grid, when electric current is reversely passed through, electric current elder generation from
Load flows into, then by output loading end Lout, at this time the collector of the 4th insulated gate bipolar transistor Q4 and gate pole it
Between be forward voltage, so conducting；It is backward voltage between the collector and gate pole of second insulated gate bipolar transistor Q2, therefore
And it turns off.Electric current is flowed into the 8th diode D8 by the 4th insulated gate bipolar transistor Q4 in this way, finally from input power grid
End Lin flows out and returns to power grid.If IGBT circuit 1 turns off, voltage meeting persistent accumulation is in the second insulated gate bipolar crystal
Pipe Q2 and the 4th both ends insulated gate bipolar transistor Q4, at the same time the 12nd two-way TVS pipe D12 and the 11st two-way TVS
Pipe D11 can play the role of centainly protecting, and prevent the second insulated gate bipolar transistor Q2 and the 4th insulated gate bipolar brilliant
Body pipe Q4 over-voltage breakdown.
It includes the 7th two-way TVS pipe D7, the 4th two-way two-way TVS pipe D10 of TVS pipe D4 and the tenth that voltage transient, which inhibits pipe 2,.
One end of one end of 7th two-way TVS pipe D7 and input power grid end Lin coupling, the other end and the 4th two-way TVS pipe D4 couple, the
One end of the other end of four two-way TVS pipe D4 and the tenth two-way TVS pipe D10 couple, the other end of the tenth two-way TVS pipe D10 with
Output loading end Lout coupling.
And when two-way TVS pipe bears the instantaneous overvoltage pulse of a high-energy, working impedance can immediately drop to one
A very low conduction value, and high current can allow for pass through, in this way when IGBT circuit 1 turns off, the second insulated gate bipolar is brilliant
Voltage value that can suddenly by a transition between body pipe Q2 and the 4th insulated gate bipolar transistor Q4, if voltage is very big,
So the 7th two-way TVS pipe D7, the 4th two-way two-way TVS pipe D10 of TVS pipe D4 and the tenth will impedance reduce immediately, and make big
Electric current passes through, would not be because of between such second insulated gate bipolar transistor Q2 and the 4th insulated gate bipolar transistor Q4
Voltage between the two is excessive and causes punch through, and power circuit is caused to damage.And the 7th two-way TVS pipe D7, the 4th two-way TVS
When pipe D4 and the tenth two-way TVS pipe D10 connects, the reversed bearing value of three increases.
And compared to the varistor for having similar action, the reverse-conducting time of two-way TVS pipe is significantly faster than pressure-sensitive
Resistance, and its reversed leakage current is much smaller, and the operating temperature of permission is also higher.
First fast restoring circuit 3 includes third fast recovery diode D3, the second fast recovery diode D2, the first fast recovery two
Pole pipe D1 and the 5th diode D5.The cathode of third fast recovery diode D3 and input power grid end Lin coupling, anode and second
The cathode of fast recovery diode D2 couples, the cathode coupling of the anode and the D1 of fast recovery diode of the second fast recovery diode D2
It connects, the anode of the first fast recovery diode D1 is coupled with the anode of the 5th diode D5, the cathode and second of the 5th diode D5
The gate pole of insulated gate bipolar transistor Q2 couples.
When in this way if being added in the voltage at 1 both ends of IGBT circuit and become reversed from forward direction, the response time is generally very short, still
If it is from reversely becoming positive, the time is relatively long, and by the first fast restoring circuit 3 of connecting on IGBT circuit 1, by
It is very thin in the base area of fast recovery diode, reverse recovery charge very little, so the reverse recovery time of fast recovery diode is shorter.
And when whole pressure drop is lower, the breakdown reverse voltage of fast recovery diode is higher, ensure that the energy when stablizing of IGBT circuit 1
It is enough to operate normally.Third fast recovery diode D3, the second fast recovery diode D2 and the first fast recovery diode D1 three are mutual
Series connection, increases the reversed bearing value of three.
The both ends of second fast restoring circuit 4 respectively with output loading end Lout and the 4th insulated gate bipolar transistor Q4 coupling
It connects, the second fast restoring circuit 4 includes the 16th fast recovery diode D16, the 15th fast recovery diode D15, the 14th fast extensive
Multiple diode D14 and the 18th diode D18.The cathode of 16th fast recovery diode D16 is electrically connected with output loading end Lout
It connects, the cathode of the 15th fast recovery diode D15 and the anode of the 16th fast recovery diode D16 couple, the 14th fast recovery
The anode of the cathode of diode D14 and the 15th fast recovery diode D15 couple, the anode and the tenth of the 18th diode D18
The anode coupling of four fast recovery diode D14, the cathode of the 18th diode D18 and the 4th insulated gate bipolar transistor Q4's
Gate pole coupling.Pass through the first fast restoring circuit 3 and the of connecting respectively on input power grid end Lin and output loading end Lout respectively
Two fast restoring circuits 4 guarantee still to be able to guarantee the two when being passed through alternating current on inputting power grid end Lin and output loading end Lout
Reversed fast quick-recovery.
The emitter of second insulated gate bipolar transistor Q2 and the 4th insulated gate bipolar transistor Q4 is separately connected defeated
Outlet DESAT-U and output end DESAT-D.And the six or two pole is respectively equipped on output end DESAT-U and output end DESAT-D
Pipe D6 and the 13rd diode D13.The collector coupling of the cathode of 6th diode D6 and the second insulated gate bipolar transistor Q2
It connects, anode and the output end DESAT-U of the 6th diode D6 is coupled, and the cathode and the 4th insulated gate of the 13rd diode D13 is double
The collector of bipolar transistor Q4 couples, and anode and the output end DESAT-D of the 13rd diode D13 is coupled, the 6th diode
D6 and the 13rd diode D13 can sample the voltage value at IGBT circuit both ends, can be transferred to the voltage value
In the circuit for controlling IGBT circuit shutdown.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Claims (6)
1. a kind of power circuit of single-phase active arc extinguishing type short-circuit protection characterized by comprising
Power module is electrically connected between input power grid end Lin and output loading end Lout, and for controlling input power grid end
The IGBT circuit (1) of power grid on-off between Lin and output loading end Lout；
The IGBT circuit (1) includes the 8th diode (D8), the second insulated gate bipolar transistor (Q2), the 9th diode
(D9), the 4th insulated gate bipolar transistor (Q4), the 12nd two-way TVS pipe (D12) and the 11st two-way TVS pipe (D11)；
The cathode of 8th diode (D8) is connected with input power grid end Lin and plus earth；
The cathode of 9th diode (D9) is connected with output loading end Lout and plus earth；
The collector of second insulated gate bipolar transistor (Q2) and the cathode of the 8th diode (D8) couple, emitter
Ground connection；
The collector of 4th insulated gate bipolar transistor (Q4) and the cathode of the 9th diode (D9) couple, emitter
Ground connection；
The IGBT circuit (1) is equipped with voltage transient and inhibits pipe (2)；
It includes the 7th two-way TVS pipe (D7) that the voltage transient, which inhibits pipe (2), one end of the 7th two-way TVS pipe (D7) with
Power grid end Lin electrical connection is inputted, the other end is connected with output loading end Lout.
2. the power circuit of single-phase active arc extinguishing type short-circuit protection according to claim 1, it is characterised in that: described
It further includes with the 4th two-way TVS pipe (D4) of the 7th two-way TVS pipe (D7) coupled in series and with the 4th that voltage transient, which inhibits pipe (2),
Tenth two-way TVS pipe (D10) of two-way TVS pipe (D4) coupled in series, the other end of the tenth two-way TVS pipe (D10) with it is defeated
Load end Lout is electrically connected out.
3. the power circuit of single-phase active arc extinguishing type short-circuit protection according to claim 1, it is characterised in that: described
IGBT circuit (1) is equipped with the first fast restoring circuit (3), and the first fast restoring circuit (3) includes third fast recovery diode
(D3) and with concatenated 5th diode (D5) of third fast recovery diode (D3), the third fast recovery diode (D3) it is negative
Pole is electrically connected with input power grid end Lin, the cathode and the second insulated gate bipolar transistor (Q2) of the 5th diode (D5)
Gate pole coupling.
4. the power circuit of single-phase active arc extinguishing type short-circuit protection according to claim 3, it is characterised in that: described
First fast restoring circuit (3) further includes the second fast recovery diode of anode with the cathode coupling of third fast recovery diode (D3)
(D2) and the first fast recovery diode (D1) of the anode coupling of cathode and the second fast recovery diode (D2), described first is fast extensive
The anode of multiple diode (D1) is coupled with the anode of the 5th diode (D5).
5. the power circuit of single-phase active arc extinguishing type short-circuit protection according to claim 4, it is characterised in that: described
The second fast restoring circuit (4) is additionally provided on IGBT circuit (1), one end of the second fast restoring circuit (4) is close to output loading
Lout is held, the other end and the 4th insulated gate bipolar transistor (Q4) couple, and the second fast restoring circuit (4) includes cathode
The 16th fast recovery diode (D16), cathode and the 16th fast recovery diode (D16) coupled with output loading end Lout
The 14th that the 15th fast recovery diode (D15), cathode and the 15th fast recovery diode (D15) of anode coupling couple is fast
18th diode (D18) of recovery diode (D14) and anode and the coupling of the 14th fast recovery diode (D14), described the
The coupling of the gate pole of the cathode of 18 diodes (D18) and the 4th insulated gate bipolar transistor (Q4).
6. the power circuit of single-phase active arc extinguishing type short-circuit protection according to claim 1, it is characterised in that: second
The gate pole of insulated gate bipolar transistor (Q2) is coupled with the 12nd two-way TVS pipe (D12), the 12nd two-way TVS pipe
(D12) the other end is grounded setting, and the gate pole of the 4th insulated gate bipolar transistor (Q4) is coupled with the 11st two-way TVS
It manages (D11), the other end of the 11st two-way TVS pipe (D11) is grounded setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820657130.6U CN208209809U (en) | 2018-05-03 | 2018-05-03 | A kind of power circuit of single-phase active arc extinguishing type short-circuit protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820657130.6U CN208209809U (en) | 2018-05-03 | 2018-05-03 | A kind of power circuit of single-phase active arc extinguishing type short-circuit protection |
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| Publication Number | Publication Date |
|---|---|
| CN208209809U true CN208209809U (en) | 2018-12-07 |
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ID=64522049
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820657130.6U Expired - Fee Related CN208209809U (en) | 2018-05-03 | 2018-05-03 | A kind of power circuit of single-phase active arc extinguishing type short-circuit protection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445359A (en) * | 2018-05-03 | 2019-11-12 | 北京北秦安全技术有限公司 | A kind of power circuit of single-phase active arc extinguishing type short-circuit protection |
-
2018
- 2018-05-03 CN CN201820657130.6U patent/CN208209809U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445359A (en) * | 2018-05-03 | 2019-11-12 | 北京北秦安全技术有限公司 | A kind of power circuit of single-phase active arc extinguishing type short-circuit protection |
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