CN208209510U - Large power supply protects system with switching power inverter - Google Patents
Large power supply protects system with switching power inverter Download PDFInfo
- Publication number
- CN208209510U CN208209510U CN201820559349.2U CN201820559349U CN208209510U CN 208209510 U CN208209510 U CN 208209510U CN 201820559349 U CN201820559349 U CN 201820559349U CN 208209510 U CN208209510 U CN 208209510U
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- output
- triode
- inverter
- Prior art date
- 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.)
- Expired - Fee Related
Links
Landscapes
- Inverter Devices (AREA)
Abstract
Protecting system with switching power inverter the utility model discloses a kind of large power supply includes being exported respectively to the input voltage detection circuit of circuit control device, input electric cur- rent measure circuit, output current detection circuit and output voltage clamp circuit；It further include Driven by inverter and protection circuit; it includes leading virtual protection circuit, upper bridge arm driving IC, lower bridge arm driving IC altogether; and gate-drive interlock circuit; the gate-drive interlock circuit includes the interlocking triode that base stage is connected with lower bridge arm driving IC output; the collector of the interlocking triode connects upper bridge arm IGBT pipe gate pole, and emitter connects the output of H bridge.
Description
Technical field
The utility model belongs to switch power technology field, and in particular to a kind of large power supply switching power inverter
Protection system.
Background technique
The inverter of general high power switching power supply is made of four IGBT (insulated gate bipolar transistor), upper bridge arm
It by IGBT Q1B, Q2B, forms, lower bridge arm is made of silicon-controlled Q1A, Q2A, wherein the hair of insulated gate bipolar transistor Q1B
The collector of emitter-base bandgap grading and insulated gate bipolar transistor Q1A connect and compose a bridge arm, wherein insulated gate bipolar transistor Q2B
Emitter and the collector of insulated gate bipolar transistor Q2A connect and compose a bridge arm.Protection for inverter is single
It is pure by driving chip the detection of the tube voltage drop of the power tube of inverter to be protected.This protected mode has with next
A little problems.
1, relatively simple, the no redundancy feature of key protection is protected, once exclusive node shielding failure, just without other benefits
Measure is rescued, will be catastrophic consequences.
2, in practical application, tube voltage drop protection circuit is easy to be interfered, and causes to malfunction, in order to anti-interference, needs to increase
Add filter capacitor, this will lead to quick-reaction capability decline of protection circuit, the protection contradictory problems such as not in time.
3, tube voltage drop protects the versatility of circuit not strong, and first, the tube voltage drop of the IGBT of same model, different lot numbers have
Difference, this will lead to, and protection is variant, and the low protective current of the tube voltage drop electric current higher than tube voltage drop is big, is more easier to damage.The
Two, the IGBT tube voltage drop difference of different model is bigger, for example, low conduction voltage drop model pipe and high speed model pipe pipe
Pressure drop can be with difference to 2 times or more, while the volt-ampere curve difference of tube voltage drop is also very big.This will lead to same Protection parameters, complete
It entirely cannot be general on the IGBT of two different models.
4, not comprehensive, only tube of current voltage drop detection protection is protected.The protection of inverter is related to overvoltage, drives logic
Deng all not having.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, and it is inverse to provide a kind of large power supply Switching Power Supply
Become device and protect system, which protects system to have the spies such as reliable, general, high-precision is comprehensive with switching power inverter
Point.
The utility model is achieved through the following technical solutions:
A kind of large power supply with switching power inverter protect system include export respectively it is defeated to circuit control device
Enter voltage detecting circuit, input electric cur- rent measure circuit, output current detection circuit and output voltage clamp circuit, further includes inversion
Device driving and protection circuit comprising lead virtual protection circuit, upper bridge arm driving IC, lower bridge arm driving IC and gate pole altogether and drive
Dynamic interlock circuit, the gate-drive interlock circuit include the interlocking triode that base stage is connected with lower bridge arm driving IC output,
The collector of the interlocking triode connects upper bridge arm IGBT pipe gate pole, and emitter connects the output of H bridge.
In the above-mentioned technical solutions, the described virtual protection circuit of leading altogether includes two inverse gates and two and door, and two
The driving signal of bridge arm is separately input into an input terminal with door, the output of two and door be correspondingly connected with upper bridge arm driving IC and
Lower bridge arm drives IC, while two inverted are respectively connected to another another input terminal with door behind the door with exporting for door to realize
Interlocking.
In the above-mentioned technical solutions, the input electric cur- rent measure circuit and output current detection circuit respectively include electric current
Sensor, the amplifier to amplify sampled signal and the comparator to be compared with setting benchmark, the ratio
Output compared with device is connected to circuit control device.
In the above-mentioned technical solutions, the input voltage detection circuit include undervoltage detection circuit, over-voltage detection circuit,
Voltage is lifted circuit and voltage detection output circuit, the voltage detection output circuit include optocoupler and pull-up resistor.
In the above-mentioned technical solutions, the over-voltage detection circuit includes over-voltage sample circuit and over-voltage triode；It is described
Undervoltage detection circuit include under-voltage sample circuit and under-voltage triode, the voltage lifting circuit includes being serially connected in optocoupler just
The first voltage-stabiliser tube and current-limiting resistance between pole and positive pole, and it is serially connected in current-limiting resistance and under-voltage triode emission interpolar
Second voltage-stabiliser tube, the cathode of the optocoupler connect the collector of under-voltage triode, the collector access of the over-voltage triode
The input terminal of second voltage-stabiliser tube.
In the above-mentioned technical solutions, voltage is respectively arranged on the emitter of the under-voltage triode and over-voltage triode
Reference element.
In the above-mentioned technical solutions, the over-voltage voltage sampling circuit and partial pressure use circuit to respectively include two series connection
Resistance, the base stage correspondence of corresponding over-voltage triode and under-voltage triode is respectively connected between two resistance.
In the above-mentioned technical solutions, the voltage reference device is TL431, on the collector of the over-voltage triode
String is equipped with light emitting diode.
In the above-mentioned technical solutions, output voltage clamp circuit include be attempted by respectively exchange output line on and another termination
Two varistors on ground, corresponding two temperature relays being mounted on varistor, after the temperature relay concatenates
One end connects power Vcc one end ground connection through current-limiting resistance, the described voltage clamping protection output be attempted by current-limiting resistance and temperature after
Appliance chamber.
In the above-mentioned technical solutions, the input voltage detection circuit, input electric cur- rent measure circuit, output electric current measure
4 input terminals of the corresponding access nor gate of the output of circuit and output voltage clamp circuit, nor gate output are connected to PWM control
Device enable end.
In the above-mentioned technical solutions, the base stage of the interlocking triode accesses lower bridge arm after diode and current-limiting resistance
Drive IC output.
A kind of large power supply protects the control method of system with switching power inverter:
When input voltage, input current, output voltage or output electric current exceed normal range (NR), then circuit control device stops
Inverter work；After voltage restores, inverter is restarted after delay scheduled time；
When PWM is disturbed, ensure that upper and lower bridge arm does not occur leading phenomenon altogether by gate-drive interlocking.
The advantages of the utility model and have the beneficial effect that the utility model by multiple protective circuit design, can be to inverse
Become the safety operation area of device, Driven by inverter logic carries out comprehensive and systematic protection.Circuit is simple, at low cost, while having and setting
The advantages that counting high reliability and high stability.Circuit versatility is good, also can be used to going above other similar product.
Detailed description of the invention
Fig. 1 is large power supply switching power inverter protection system block diagram；
Fig. 2 is input voltage detection circuit；
Fig. 3 is input electric cur- rent measure circuit；
Fig. 4 is output current detection circuit；
Fig. 5 is output voltage clamp circuit；
Fig. 6 is Driven by inverter and protection circuit；
Fig. 7 is inverter control circuit；
It for those of ordinary skill in the art, without creative efforts, can be according to above attached
Figure obtains other relevant drawings.
Specific embodiment
In order to make those skilled in the art better understand the scheme of the utility model, combined with specific embodiments below into one
Step illustrates the technical solution of the utility model.
Embodiment one
As shown in figs. 1-7, the large power supply of the present embodiment protects system with switching power inverter, including exports respectively
To circuit control device, the i.e. input voltage detection circuit 1 of inverter control circuit 6, input electric cur- rent measure circuit 2, output electricity
Current detection circuit 3 and output voltage clamp circuit 4 further include Driven by inverter and protection circuit 5 comprising lead virtual protection altogether
Circuit, upper bridge arm driving IC, lower bridge arm driving IC and gate-drive interlock circuit, the gate-drive interlock circuit packet
It includes base stage and exports the interlocking triode being connected with lower bridge arm driving IC, the collector of the interlocking triode connects upper bridge arm
IGBT pipe gate pole, emitter connect the output of H bridge.Wherein, it is described lead altogether virtual protection circuit include two inverse gate U1A and
U1B and two is separately input into an input terminal with door with door U2A and U2A, the driving signal of two bridge arms, two with door
Output is correspondingly connected with bridge arm driving IC and lower bridge arm driving IC, at the same two with the output of door is inverted respectively is connected to behind the door
Another another input terminal with door is to realize interlocking.
Wherein, the input terminal of input voltage detection circuit 1 is attempted by the inlet highway anode 11 and negative terminal of H bridge inverter 15
23 both ends.The input terminal bus anode 11 of H bridge inverter 15 passes through the current sensor Tin of input electric cur- rent measure circuit 2.H bridge
The either end (output end 12 that Fig. 1 show H bridge inverter 15) at the output both ends 12 and 27 of inverter 15 passes through output electric current
The current sensor Tout of detection circuit 3.Output voltage clamp circuit 4 be connected across the output end 12,27 of H bridge inverter 15 with
Between ground.Input voltage detection circuit 1, input electric cur- rent measure circuit 2, output current detection circuit 3 and output voltage clamper electricity
The corresponding protection output signal 7,8,9 and 10 on road 4 is connected with inverter control circuit 6.Inverter control circuit 6 exports PWM letter
Numbers 14 are connected with Driven by inverter and protection circuit 5, Driven by inverter and protection circuit 5 output IGBT driving signal 13 and H bridge
Inverter 15 is connected.
As Fig. 6 be shown Driven by inverter and protection circuit 5, including lead altogether virtual protection circuit 21, driving ICA, driving
ICB, gate-drive interlock circuit 22.Leading virtual protection circuit 21 altogether is custom circuit.Drive ICA and driving ICB can basis
The parameter of IGBT pipe Q1A and Q1B selects suitable model (such as HCPL316J, M57959).Gate-drive interlock circuit 22
Including resistance R1, diode D2 and triode Q3, the one end resistance R1 is connected with lower bridge arm driving ICB output, other end connection two
Pole pipe D2 anode, diode cathode connecting triode Q3 base stage, triode Q3 collector connect the door of upper bridge arm IGBT pipe Q1A
Pole, emitter connect H bridge output 12.
The course of work of Driven by inverter as shown in Figure 6 and protection circuit 5 are as follows:
Pwm signal 14 by leading virtual protection circuit 21 altogether, the ICA and driving ICB and current-limiting resistance Ra that overdrived,
Rb, driving bridge arm IGBT pipe, sequential working as required.The course of work of gate-drive interlock circuit 22 are as follows: work as lower bridge arm
When IGBT pipe Q1B is driven to high, triode Q3 is connected, and bridge arm drive level is low level in locking, realizes interlocking.This electricity
Road reliably can protect IGBT when the timing of pwm signal and driving signal is disturbed.
If Fig. 7 is inverter control circuit 6, including one 4 input nor gate and a PWM controller.Sampling protection is defeated
Signal is connected respectively to 4 input terminals of nor gate out, and nor gate output is connected to PWM controller enable end, and PWM controller can
Using single-chip microcontroller or special chip (such as UC2895, SG3525).If there is a protection signal (high level protection) to occur, or
NOT gate exports low level, closes pwm signal 14, protects H bridge inverter 15.
Wherein, the input electric cur- rent measure circuit and output current detection circuit respectively include current sensor, to
By the amplifier of sampled signal amplification and the comparator to be compared with setting benchmark, the output of the comparator connects
It is connected to circuit control device.
Specifically, as shown in figure 3, input current of inverter detection circuit 2 is put by current sensor Tin, sampled signal
Big device 16 and comparator Uh1C composition.Sampled signal amplifier 16 is constituted by resistance Rh1~Rh5, amplifier Uh1D, the amplifier
It is designed for conventional amplifiers.The sampled signal of sensor Tin output is connected after the amplification of signal amplifier 16 by resistance Rh11
To the negative input end of comparator Uh1C, compared with setting benchmark Ref1.Setting benchmark Ref1 is transfiniting for input current of inverter
Value, the signal detected are more than setting benchmark Ref1, and 8 overturning of input electric cur- rent measure output exports high level.
As shown in figure 4, inverter output current detection circuit 3 is by current sensor Tout, 17 and of sampled signal amplifier
Comparator Uh1B composition.Sampled signal amplifier 17 is formed by resistance Rh6~Rh10 and amplifier Uh1A, which is also normal
Advise Amplifier Design.The sampled signal of sensor Tout output is connected to ratio by resistance Rh12 after the amplification of signal amplifier 17
Compared with the negative input end of device Uh1B, compared with setting benchmark Ref2.Setting benchmark Ref2 is the overload values of inverter output current, inspection
The signal measured is more than setting benchmark Ref2, and 9 overturning of detection circuit output exports high level.Inverter output current detects function
Can, it can be used to implement inverter peak point current operating mode, and protect IGBT (or load) in trouble free service current range
It is interior, enhance the Performance And Reliability of inverter.
The utility model is designed by multiple protective circuit, can safety operation area to inverter, Driven by inverter patrol
It collects and carries out comprehensive and systematic protection.Circuit is simple, at low cost, while having many advantages, such as to design high reliability and high stability.Electricity
Road versatility is good, also can be used to going above other similar product.
Embodiment two
Specifically, inverter input voltage detection circuit 1, including over-voltage detection circuit 18, under-voltage inspection are illustrated in figure 2
Slowdown monitoring circuit 19, voltage lifting circuit 20, optocoupler Uu1 and pull-up resistor Ru7.Over-voltage detection circuit 18 is connected across inlet highway anode
Between 11 and inlet highway negative terminal 23, the over-voltage output 24 of over-voltage detection circuit 18 is connected with voltage lifting circuit.Under-voltage detection
Circuit 19 is connected across between inlet highway anode 11 and inlet highway negative terminal 23, the under-voltage output 26 of undervoltage detection circuit 19 with
The light-emitting diodes tube cathode of optocoupler Uu1 is connected, and under-voltage emitter output 25 is connected with voltage lifting circuit 20.
Over-voltage detection circuit 18 includes: resistance Ru1, Ru2, over-voltage triode Qu4 and voltage reference device, i.e. benchmark Tu1.
Benchmark Tu1 uses TL431.Resistance Ru1 and Ru2 as over-voltage voltage sampling circuit are connected across inlet highway anode 11 after connecting
Between inlet highway negative terminal 23, inlet highway upper voltage limit is set by setting the ratio of resistance Ru1 and Ru2.Over-voltage three
Pole pipe Qu4 base stage is connected to the series connection point of resistance Ru1 and Ru2, over-voltage triode Qu4 current collection extremely over-voltage output 24, with voltage
The cathode of voltage-stabiliser tube Du12 in lifting circuit 20 is connected with the cathode of light emitting diode LDu1, over-voltage triode Qu4 emitter
It is connected with the cathode of benchmark Tu1 and reference output, the anode of benchmark Tu1 is connected with inlet highway negative terminal 23.
Undervoltage detection circuit 19 includes resistance Ru3, Ru4, under-voltage triode Qu5 and benchmark Tu2.Voltage reference device, i.e.,
Benchmark Tu2 uses TL431.It is connected across between inlet highway anode 11 and inlet highway negative terminal 23 after resistance Ru3, Ru4 series connection,
Busbar voltage lower limit is set by the ratio of resistance Ru3 and resistance Ru4.Under-voltage triode Qu5 base stage be connected to resistance Ru3 and
The series connection point of Ru4, output 26 that under-voltage triode Qu5 current collection is extremely under-voltage, is connected to the cathode of the luminous tube of optocoupler Uu1, under-voltage
Emitter output 25 that triode Qu5 transmitting is extremely under-voltage, is connected with the reference output of the cathode of benchmark Tu2, benchmark Tu2, base
The anode of quasi- Tu2 is connected with inlet highway negative terminal 23.
Wherein, voltage lifting circuit includes current-limiting resistance Ru6, voltage-stabiliser tube Du01, Du12 and light emitting diode LDu1；Current limliting
The one end resistance Ru6 is connected to inlet highway anode 11, the other end respectively with the cathode of voltage-stabiliser tube Du01, light emitting diode LDu1
Anode is connected, by selecting the pressure stabilizing value of voltage-stabiliser tube to be connected a little to set current-limiting resistance Ru6 with the anode of the cathode of Du01, LDu1
Voltage, this example select 10V voltage-stabiliser tube；Voltage-stabiliser tube Du12 cathode is connected with the cathode of the benchmark Tu2 in under-voltage protecting circuit 19,
The cathode of voltage-stabiliser tube Du01 is connected with the luminous tube anode of optocoupler Uu1.The phototriode pipe collector of optocoupler Uu1 is input voltage
Detection protection output end, is connected to power Vcc by pull-up resistor Ru7, emitter is connected to ground.
The course of work of inverter input voltage detection circuit 1 as shown in Figure 2 are as follows:
Over-voltage triode Qu4 is closed when inlet highway voltage is normal, under-voltage triode Qu5 is connected, resistance Ru6, voltage-stabiliser tube
Du01, the light emitting diode of optocoupler Uu1, under-voltage triode Qu5 and benchmark Tu2 form access, and optocoupler Uu output conducting is protected defeated
Signal 7 is low level out；When overvoltage protection, over-voltage triode Qu4 conducting, resistance Ru6, light emitting diode LDu1, three pole of over-voltage
Pipe Qu4 and benchmark Tu1 forms access, and voltage-stabiliser tube Du01 cathode voltage is dragged down, and optocoupler Uu1 output is closed, and protects output signal
7 be high level；When under-voltage, under-voltage triode Qu5 is closed, and the light emitting diode access of optocoupler Uu1 disconnects, and optocoupler Uu1 output is closed
It closes, protection output signal 7 is high level.
This inverter input voltage detection circuit sampling passive design improve voltage detecting circuit anti-interference ability and
Terseness；The use of over-voltage triode Qu4, Qu5 improve detection sensitivity；Voltage is lifted circuit and improves detection reliability.
Embodiment three
The output voltage clamp circuit include be attempted by respectively exchange output line on and the other end ground connection two pressure
Quick resistance, corresponding two temperature relays being mounted on varistor, one end is through current limliting after the temperature relay concatenates
Resistance connects power Vcc one end ground connection, and the voltage clamping protection output is attempted by between current-limiting resistance and temperature relay.
As shown in figure 5, inverter output voltage clamp circuit 4 include varistor Rym1, Rym2, temperature relay FR1,
FR2 composition, one end of varistor Rym1, Rym2 are connected to the H bridge output two being made of IGBT pipe Q1A, Q1B, Q2A and Q2B
End 12 and 27, other end ground connection.Temperature relay FR1, FR2 are mounted on respectively on varistor Rym1, Rym2, and contact is normally closed.
Pass through inverter output voltage clamp circuit, it can be ensured that inverter voltage-to-ground is within the scope of safe voltage.Work as temperature relay
When FR1, FR2 detect varistor Rym1, Rym2 overtemperature, contact is disconnected, and the protection signal of relay voltage clamp circuit is defeated
10 become high level out.
A kind of large power supply of the utility model protects the control method of system with switching power inverter, and feature exists
In:
When input voltage, input current, output voltage or output electric current exceed normal range (NR), then circuit control device stops
Inverter work；After voltage restores, inverter is restarted after delay scheduled time；
When PWM is disturbed, ensure that upper and lower bridge arm does not occur leading phenomenon altogether by gate-drive interlocking.
Illustrative description has been done to the utility model above, it should explanation, in the core for not departing from the utility model
In the case where the heart, it is any it is simple deformation, modification or other skilled in the art can not spend creative work etc.
The protection scope of the utility model is each fallen with replacement.
Claims (11)
1. a kind of large power supply protects system with switching power inverter, it is characterised in that: including being exported respectively to inverter
Input voltage detection circuit, input electric cur- rent measure circuit, output current detection circuit and the output voltage clamp circuit of controller,
It further include Driven by inverter and protection circuit comprising virtual protection circuit, upper bridge arm driving IC, lower bridge arm driving IC are led altogether,
And gate-drive interlock circuit, the gate-drive interlock circuit includes base stage be connected with lower bridge arm driving IC output it is mutual
Triode is locked, the collector of the interlocking triode connects upper bridge arm IGBT pipe gate pole, and emitter connects the output of H bridge.
2. a kind of large power supply according to claim 1 protects system with switching power inverter, it is characterised in that: institute
The virtual protection circuit of leading altogether stated includes two inverse gates and two and door, and the driving signal of two bridge arms is separately input into and door
An input terminal, the output of two and door is correspondingly connected with upper bridge arm driving IC and lower bridge arm driving IC, at the same two with door
Output is inverted respectively to be connected to another another input terminal with door behind the door to realize interlocking.
3. a kind of large power supply according to claim 1 protects system with switching power inverter, it is characterised in that: institute
The input electric cur- rent measure circuit and output current detection circuit stated respectively include current sensor, to amplify sampled signal
Amplifier and the comparator to be compared with setting benchmark, the output of the comparator are connected to inverter control
Device.
4. a kind of large power supply according to claim 1 protects system with switching power inverter, it is characterised in that: institute
The input voltage detection circuit stated includes that undervoltage detection circuit, over-voltage detection circuit, voltage lifting circuit and voltage detecting are defeated
Circuit out, the voltage detection output circuit include optocoupler and pull-up resistor.
5. a kind of large power supply according to claim 4 protects system with switching power inverter, it is characterised in that: institute
The over-voltage detection circuit stated includes over-voltage sample circuit and over-voltage triode；The undervoltage detection circuit includes under-voltage sampling electricity
Road and under-voltage triode, the described voltage lifting circuit include be serially connected in optocoupler anode between positive pole the first voltage-stabiliser tube and
Current-limiting resistance, and it is serially connected in the second voltage-stabiliser tube of current-limiting resistance and under-voltage triode emission interpolar, the cathode of the optocoupler
The collector of under-voltage triode is connect, the collector of the over-voltage triode accesses the input terminal of the second voltage-stabiliser tube.
6. a kind of large power supply according to claim 5 protects system with switching power inverter, it is characterised in that: institute
Voltage reference device is respectively arranged on the emitter of the under-voltage triode and over-voltage triode stated.
7. a kind of large power supply according to claim 5 protects system with switching power inverter, it is characterised in that: institute
The over-voltage voltage sampling circuit stated and partial pressure respectively include two concatenated resistance using circuit, corresponding over-voltage triode and owe
The base stage correspondence of pressure triode is respectively connected between two resistance.
8. a kind of large power supply according to claim 6 protects system with switching power inverter, it is characterised in that: institute
The voltage reference device stated is TL431, and string is equipped with light emitting diode on the collector of the over-voltage triode.
9. a kind of large power supply according to claim 1 protects system with switching power inverter, it is characterised in that: defeated
Out voltage clamp circuit include be attempted by respectively exchange output line on and the other end ground connection two varistors, correspondence be mounted on
Two temperature relays on varistor, one end connects power Vcc one end through current-limiting resistance after the temperature relay concatenates
Ground connection, the voltage clamping protection output are attempted by between current-limiting resistance and temperature relay.
10. a kind of large power supply according to claim 1 protects system with switching power inverter, it is characterised in that:
The input voltage detection circuit, input electric cur- rent measure circuit, output current detection circuit and output voltage clamp circuit
4 input terminals of the corresponding access nor gate of output, nor gate output are connected to PWM controller enable end.
11. a kind of large power supply according to claim 1 protects system with switching power inverter, it is characterised in that:
The base stage of the interlocking triode accesses lower bridge arm driving IC output after diode and current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820559349.2U CN208209510U (en) | 2018-04-18 | 2018-04-18 | Large power supply protects system with switching power inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820559349.2U CN208209510U (en) | 2018-04-18 | 2018-04-18 | Large power supply protects system with switching power inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208209510U true CN208209510U (en) | 2018-12-07 |
Family
ID=64523565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820559349.2U Expired - Fee Related CN208209510U (en) | 2018-04-18 | 2018-04-18 | Large power supply protects system with switching power inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208209510U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088398A (en) * | 2018-04-18 | 2018-12-25 | 核工业理化工程研究院 | Large power supply protects system and control method with switching power inverter |
| CN113328416A (en) * | 2021-08-03 | 2021-08-31 | 武汉市聚芯微电子有限责任公司 | Full-bridge overcurrent protection circuit and full-bridge overcurrent protection method |
-
2018
- 2018-04-18 CN CN201820559349.2U patent/CN208209510U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088398A (en) * | 2018-04-18 | 2018-12-25 | 核工业理化工程研究院 | Large power supply protects system and control method with switching power inverter |
| CN113328416A (en) * | 2021-08-03 | 2021-08-31 | 武汉市聚芯微电子有限责任公司 | Full-bridge overcurrent protection circuit and full-bridge overcurrent protection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109088398A (en) | Large power supply protects system and control method with switching power inverter | |
| CN202550515U (en) | High-power IGBT (insulated gate bipolar transistor) comprehensive overcurrent protection circuit | |
| CN102684652B (en) | The synchronized-pulse control circuit of anti-MCU or drive IC fault | |
| CN208209510U (en) | Large power supply protects system with switching power inverter | |
| CN204733146U (en) | A kind of single-phase intelligent solid-state relay | |
| CN204882821U (en) | Killer switch state detection circuitry | |
| CN201571006U (en) | Brake unit | |
| CN105932344B (en) | One kind can cascade power battery pack security protection module | |
| CN204230865U (en) | A kind of motor protecting device | |
| CN207638631U (en) | A kind of IGBT protection circuit | |
| CN218472757U (en) | Equipment power supply control device | |
| CN201378730Y (en) | Power circuit breaker protective circuit | |
| CN207923315U (en) | Wisdom safety utilization of electric power monitoring detector temperature monitoring circuit | |
| CN108963982A (en) | Appliances power source voltage protection circuit | |
| CN204758768U (en) | IGBT overflows failure detector circuit | |
| CN201877778U (en) | Overcurrent protection circuit of solar street lamp | |
| CN203350670U (en) | Transformer cooling system comprehensive and intelligent controller | |
| CN210625741U (en) | Super capacitor module information acquisition control system | |
| CN201750333U (en) | Drive circuit | |
| CN105896563B (en) | Zero-crossing trigger control circuit of anti-parallel thyristor split-phase switching capacitor | |
| CN103475196B (en) | A kind of insulated gate bipolar transistor driver | |
| CN205123231U (en) | High -temperature early warning surge protector | |
| CN208386135U (en) | A kind of photovoltaic switching off device tandem drive circuit | |
| CN208316685U (en) | A kind of solid-state power amplifier protection system | |
| CN106655716A (en) | SiC-based water-cooled high-power braking unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181207 |