CN107171289A - A kind of protection circuit - Google Patents
A kind of protection circuit Download PDFInfo
- Publication number
- CN107171289A CN107171289A CN201710419011.7A CN201710419011A CN107171289A CN 107171289 A CN107171289 A CN 107171289A CN 201710419011 A CN201710419011 A CN 201710419011A CN 107171289 A CN107171289 A CN 107171289A
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- Prior art keywords
- comparator
- circuit
- voltage
- inverter
- reference voltage
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Classifications
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- 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
-
- 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
- H02H7/1203—Circuits independent of the type of conversion
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
A kind of protection circuit; including the first voltage protection circuit for the output end for being connected to inverter; the first voltage protection circuit includes first comparator, the first delay circuit and the second comparator sequentially connected; wherein; the first comparator is used for the output voltage and the first reference voltage for receiving and comparing the inverter, to export the first signal；The first signal that first delay circuit is exported according to the first comparator is charged, to change the output voltage of the first delay circuit；Second comparator is used to receive and compare the second reference voltage and the output voltage of first delay circuit, to export signal identical with the first comparator；The output end of second comparator is connected with the prime control chip of the inverter, and the signal that the prime control chip is exported according to two comparator controls the working condition of the inverter.
Description
Technical field
The present invention relates to inverter technology field, more particularly to a kind of protection circuit.
Background technology
Aviation is that, into 115V, 400HZ exchanges supply electricity to each on aircraft 28V DC power conversions on aircraft with the effect of inverter
Plant power supply for electrical equipment.If the overtension that inverter is provided can burn out electrical equipment, whereas if the electricity of inverter output
Press through low and can use electric equipment can not normal work.And such case self-checking system of getting off the plane can not detect fault of converter
It is switched to standby inverter.So potential safety hazard directly can be caused to persons on board.
Current civilian inverter is to carry out protection control to output voltage by intelligent chips such as single-chip microcomputers.But single-chip microcomputer
The reliability and anti-interference of itself are bad, are not suitable for the aviation inverter higher to reliability and anti-interference requirement.
The content of the invention
In view of above-mentioned condition, it is necessary to protect asking for control reliability difference for the output voltage of inverter in the prior art
Topic, proposes a kind of protection circuit.
A kind of protection circuit, including it is connected to the first voltage protection circuit of the output end of inverter, the first voltage
Protection circuit includes first comparator, the first delay circuit and the second comparator sequentially connected, wherein,
The first comparator is used for the output voltage and the first reference voltage for receiving and comparing the inverter, to export
First signal；
The first signal that first delay circuit is exported according to the first comparator is charged, and is prolonged with changing first
When circuit output voltage；
Second comparator is used to receive and compare the second reference voltage and the output voltage of first delay circuit,
To export signal identical with the output signal of the first comparator；
The output end of second comparator is connected with the prime control chip of the inverter, the prime control chip
The signal exported according to two comparator controls the working condition of the inverter.
Above-mentioned protection circuit, wherein, the in-phase input end and inverting input of the first comparator are respectively connected to described
The output voltage of inverter and the first reference voltage, the protection circuit also include the second electricity for being connected to the output end of inverter
Voltage protection circuit, the second voltage protection circuit includes the 3rd comparator, the second delay circuit and the 4th ratio sequentially connected
Compared with device, wherein,
The in-phase input end and inverting input of 3rd comparator are respectively connected to the 3rd reference voltage and the inversion
The output voltage of device, output voltage and the 3rd reference voltage for comparing the inverter, to export secondary signal, described
Three reference voltages are less than the first reference voltage；
The secondary signal that second delay circuit is exported according to the 3rd comparator is charged, and is prolonged with changing second
When circuit output voltage；
4th comparator is used for the output voltage for receiving and comparing the 4th reference voltage and second delay circuit,
To export the output signal identical signal with the 3rd comparator；
The output end of 4th comparator is connected with the prime control chip of the inverter, the prime control chip
The signal exported according to second comparator and the 4th comparator controls the working condition of the inverter.
Above-mentioned protection circuit, wherein, when the first comparator exports high level signal, first delay circuit fills
Electricity, so that the voltage of first delay circuit output is more than second reference voltage, the high electricity of the second comparator output
Ordinary mail number, the prime control chip controls the inverter to be stopped；
When the 3rd comparator exports high level signal, the second delay circuit charging, so that described second prolongs
When circuit output voltage be more than the 4th reference voltage, the 4th comparator exports high level signal, and the prime controls core
Piece controls the inverter to be stopped；
When the first comparator and the 3rd comparator export low level signal, first delay circuit and second
Delay circuit does not charge, the inverter work.
Above-mentioned protection circuit, wherein, the in-phase input end and inverting input of two comparator are respectively connected to first and prolonged
When circuit output voltage and second reference voltage；In-phase input end and the inverting input difference of 4th comparator
Access the voltage and the 4th reference voltage of the second delay circuit output.
Above-mentioned protection circuit, wherein, first delay circuit and the second delay circuit include the pull-up being connected in series
Resistance and a ground capacity.
Above-mentioned protection circuit, wherein, the first voltage protection circuit also includes with first comparator and second comparing respectively
The first reference voltage generating circuit and the second reference voltage generating circuit connected compared with device, first reference voltage generating circuit
Include two the first divider resistances with the second reference voltage generating circuit；The second voltage protection circuit also include respectively with
The 3rd reference voltage generating circuit and the 4th reference voltage generating circuit of 3rd comparator and the 4th the comparator connection, institute
Stating the 3rd reference voltage generating circuit and the 4th reference voltage generating circuit includes two the second divider resistances.
Above-mentioned protection circuit, wherein, in addition to two be connected to the defeated of second comparator and the 4th comparator
Go out first diode at end, two first diodes are connected with the prime control chip of the inverter.
Above-mentioned protection circuit, wherein, in addition to bleeder circuit and current rectifying and wave filtering circuit, the input of the bleeder circuit and
Output end is connected with the inverter and earth terminal respectively, includes the 3rd divider resistance of two series connection, the rectifying and wave-filtering electricity
Node connection between the input on road and two the 3rd divider resistances, output end and the first voltage protection circuit and
The input connection of second voltage protection circuit, the current rectifying and wave filtering circuit includes the second diode and electric capacity.
The embodiment of the present invention is by setting first comparator to compare the output voltage and threshold voltage of inverter, according to comparing
As a result the first signal is exported, the electric signal that delay circuit is exported according to first comparator is charged, exports the second comparator
With first comparator identical electric signal, the electric signal exported by the second comparator controls the working condition of inverter, so that
Limit the output voltage of inverter.The present embodiment is also by setting delay circuit to avoid the unstable feelings of the output voltage of inverter
It is stopped suddenly under shape and certain damage is caused to equipment.When so the output voltage of inverter exceedes threshold value, continue one section
Still exceed threshold value after time, then send control signal and stop inverter work to the prime control chip of inverter.
Brief description of the drawings
Fig. 1 be first embodiment of the invention in protection circuit circuit diagram；
Fig. 2 be second embodiment of the invention in protection circuit circuit diagram.
Main element symbol description
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
With reference to following description and accompanying drawing, it will be clear that these and other aspects of embodiments of the invention.In these descriptions
In accompanying drawing, some particular implementations in embodiments of the invention are specifically disclosed, to represent the implementation for implementing the present invention
Some modes of the principle of example, but it is to be understood that the scope of embodiments of the invention is not limited.On the contrary, the present invention
Embodiment includes all changes, modification and the equivalent fallen into the range of the spirit and intension of attached claims.
It is the protection circuit in first embodiment of the invention to refer to Fig. 1, including be connected to the output end of inverter 10
First voltage protection circuit, the inverter is used for the direct current of supply voltage, exchange conversion, and the friendship needed is provided for power supply unit
Stream electricity.The first voltage protection circuit is used for the output voltage for controlling inverter, prevents its too high or too low.
The first voltage protection circuit includes first comparator U1A, the first delay circuit 20 and second sequentially connected
Comparator U1D.The first comparator U1A is used for the output voltage and the first reference voltage for receiving and comparing the inverter 10
U1, to export the first signal.First comparator U1A is exported according to the output voltage of inverter 10 and the size of the first reference voltage
Corresponding level signal.First reference voltage is the threshold value of inverter output voltage.
First delay circuit 20 is charged according to the first comparator U1A the first signals exported, to change
The output voltage of first delay circuit.When the first signal is high level signal, the first delay circuit is charged, when the first letter
Number be low level signal when the first delay circuit without charging.
The in-phase input end and inverting input of the second comparator U1D is respectively connected to the defeated of first delay circuit
Go out voltage and the second reference voltage, the output voltage for comparing the second reference voltage U2 and first delay circuit 20, with
Output signal identical with the output signal of the first comparator U1A.When first comparator U1A the first signals exported are high electricity
During ordinary mail, the first delay circuit 20 is charged, and the voltage exported after charging is more than the second reference voltage, the second comparator
U1D exports high level signal.Conversely, when the first signal of first comparator U1A outputs is low level signal, the first delay circuit
20 do not charge, and the voltage of device output is less than the second reference voltage U2, and the defeated U1D of the second comparator goes out low level signal.
The output end of the second comparator U1D is connected with the prime control chip 11 of the inverter 10, the prime
The signal that control chip 11 is exported according to second comparator controls the working condition of the inverter 10.When the second comparator
When U1D exports high level signal, the control inverter 10 of prime control chip 11 of inverter 10 is stopped.
The present embodiment is by setting first comparator to compare the output voltage and threshold voltage of inverter, according to comparative result
The first signal is exported, the electric signal that delay circuit is exported according to first comparator is charged, make the second comparator output and the
One comparator identical electric signal, the electric signal exported by the second comparator controls the working condition of inverter, so as to limit
The output voltage of inverter.In the case of the present embodiment also avoids the output voltage of inverter unstable by setting delay circuit
It is stopped suddenly and certain damage is caused to equipment.When so the output voltage of inverter exceedes threshold value, continue for some time
Still exceed threshold value afterwards, then send control signal and stop inverter work to the prime control chip of inverter.
Referring to Fig. 2, be the protection circuit in second embodiment of the invention, including and it is connected to the output end of inverter 10
First voltage protection circuit and second voltage protection circuit.
The first voltage protection circuit includes first comparator U1A, the first delay circuit 20 and second sequentially connected
Comparator U1D.The in-phase input end and inverting input of the first comparator U1A is respectively connected to the output electricity of the inverter
Pressure and the first reference voltage.The first comparator U1A is used for the output voltage for comparing the inverter 10 and the first benchmark electricity
Pressure, and according to comparative result to export the first signal.First delay circuit 20 is according to the of first comparator U1A output
One signal changes charged state, to change the size of its output voltage.The in-phase input end of the second comparator U1D and anti-phase
Input is respectively connected to the voltage and the second reference voltage that first delay circuit 20 is exported, for comparing the second reference voltage
With the output voltage of first delay circuit 20, to export identical with the output signal of first comparator signal.
First delay circuit 20 includes the first pull-up resistor R7 for being connected in series and the first ground capacity C2, and described the
Node connection between one comparator U1A and the second comparator U1D and the pull-up resistor R7 and ground capacity C2.First delay
The delay time of circuit 20 can be by changing the first ground capacity C2 parameter changes.
The first voltage protection circuit also includes the be connected respectively with first comparator U1A and the second comparator U1D
One reference voltage generating circuit and the second reference voltage generating circuit, the first reference voltage generating circuit and the second benchmark electricity
Pressure generation circuit includes two the first divider resistances for being connected in series in power end and earth terminal.
Node between first comparator U1A and two first divider resistances R3, R4 of the first reference voltage generating circuit
Connection, supply voltage is by two of the first reference voltage generating circuit the first divider resistance R3, and R4 exported after partial pressures the
Inverting input of one reference voltage to first comparator U1A.For example, the first reference voltage is by R3, R4 partial pressure 15V direct currents take
.R3 is adjusted, R4 magnitude of voltage can adjust the value of the first reference voltage.
Node between second comparator U1D and two first divider resistances R9, R10 of the second reference voltage generating circuit
Connection, supply voltage is by two of the second reference voltage generating circuit the first divider resistance R9, and R10 exported after partial pressures the
The inverting input of two reference voltages to the second comparator U1D.
The first voltage protection circuit also includes the first diode for being connected to the second comparator U1D output ends
D2, the first diode D2 is connected with the prime control chip of the inverter 10.Second is compared by the first diode D2
Sent compared with the device U1D electric signals exported to the prime control chip of inverter 10.Second comparator U1D and the first diode D2 it
Between be additionally provided with a pull-up resistor R13.
The second voltage protection circuit includes the 3rd comparator U1B, the second delay circuit 30 and the 4th sequentially connected
Comparator U1C.The in-phase input end and inverting input of the 3rd comparator U1B is respectively connected to the 3rd reference voltage and described
The output voltage of inverter 10, the 3rd comparator U1B is used for the output voltage and the 3rd benchmark for comparing the inverter 10
Voltage, to export secondary signal.
The secondary signal that second delay circuit 30 is exported according to the 3rd comparator U1B changes charged state, with
Change the size of its output voltage.The in-phase input end and inverting input of the 4th comparator U1C is respectively connected to described
The output voltage and the 4th reference voltage of two delay circuits 30, for comparing the 4th reference voltage and second delay circuit
Output voltage, to export and the 3rd comparator identical signal.
Second delay circuit 30 includes the second pull-up resistor R8 for being connected in series and the second ground capacity C3, and described the
Node connection between three comparator U1B and the 4th comparator U1C and the second pull-up resistor R8 and the second ground capacity C3.
The delay time of second delay circuit 30 can be changed by changing the second ground capacity C3 parameter.
The second voltage protection circuit also includes the 3rd benchmark electricity for being connected to the 3rd comparator U1B in-phase input end
Pressure generation circuit and the 4th reference voltage generating circuit for being connected to the 4th comparator inverting input.The 3rd benchmark electricity
Generation circuit and the 4th reference voltage generating circuit is pressed to include two the second divider resistances.Electricity is produced by the 3rd reference voltage
Reference voltage in road and the 4th reference voltage generating circuit formation the 3rd comparator U1B and the 4th comparator U1C.For example, the
Three reference voltages are obtained by the second divider resistance R5, R6 partial pressure 15V direct currents, and the 4th reference voltage passes through the second divider resistance
R11, R12 partial pressure 15V direct currents are obtained.
The second voltage protection circuit also includes the first diode D3 for being connected to the 4th comparator output terminal, institute
The prime control chip that the first diode D3 is stated with the inverter 10 is connected.By the first diode D3 by the 3rd comparator
The electric signal of U1B outputs is sent to the prime control chip of inverter 10.Between 4th comparator U1C and the first diode D3 also
Provided with a pull-up resistor R14.
The signal that the prime control chip of inverter is exported according to the second comparator U1D and the 4th comparator U1C controls institute
The working condition of inverter is stated, when at least one in the signal that the second comparator U1D and the 4th comparator U1C is exported is high electricity
During ordinary mail, control inverter 10 is stopped.
3rd reference voltage described in the present embodiment is less than the first reference voltage, the first reference voltage and the 3rd reference voltage
The respectively higher limit and lower limit of inverter output voltage.When the output voltage of the inverter 10 is more than first benchmark
During voltage, described first compares U1A output high level signals.Now, by the first pull-up resistor R7 and the first ground capacity C2 groups
Into the first delay circuit 20 start to charge up, when the voltage on the first ground capacity C2, to be charged to certain value (bigger than magnitude of voltage on R10
When), the first comparator U1A exports high level signal.The prime control chip control inverter 10 of inverter 10 stops work
Make.
When the output voltage of the inverter 10 is less than three reference voltage, the 3rd comparator U1B outputs
High level signal, is started to charge up, second by the second pull-up resistor R8 and the second ground capacity C3 the second delay circuit 30 constituted
The 4th comparator U1C exports high level signal to voltage on ground capacity C3 (when bigger than magnitude of voltage on R12) when being charged to certain value.
Now, the prime control chip control inverter 10 of inverter 10 is stopped.
It is described when the output voltage of the inverter 10 is less than first reference voltage and is more than three reference voltages
First comparator U1A exports low level signal, and first delay circuit 20 does not charge, the voltage of the first delay circuit 20 output
Less than the second reference voltage, the second comparator U1D output low level signals；The 3rd comparator U1B exports low level simultaneously
Signal, second delay circuit 30 does not charge, and the voltage that second delay circuit 30 is exported is less than the 4th reference voltage, the
Four comparator U1C export low level signal, and no signal is worked by the prime control chip of inverter 10, inverter 10.
Further, the protection circuit also includes bleeder circuit and current rectifying and wave filtering circuit, the bleeder circuit and inversion
Device is connected, and includes the 3rd divider resistance R1, R2 of two series connection.The input of the current rectifying and wave filtering circuit and two the described 3rd
Node connection between divider resistance R1, R2, output end and the first voltage protection circuit and second voltage protection circuit
Input is connected.The current rectifying and wave filtering circuit includes the electric capacity C1 of a diode D1 and ground connection.The inverter of general aviation
115V is exported, 400Hz alternating current obtains 10V or so alternating currents by two the 3rd divider resistances R1, R2 bleeder circuit.
The positive voltage of positive half period is exported after the current rectifying and wave filtering circuit that diode D1 and electric capacity C1 is constituted again.
The present embodiment is by setting first voltage protection circuit and the second electric protection circuit, and control inverter is defined defeated
Go out work in voltage range.Compared with prior art, the present invention realizes the mistake of aviation inverter using analog circuit, owes electricity
Pressure protection, circuit is simple, and reliability is high, easy to maintenance.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of protection circuit, it is characterised in that described including the first voltage protection circuit for the output end for being connected to inverter
First voltage protection circuit includes first comparator, the first delay circuit and the second comparator sequentially connected, wherein,
The first comparator is used for the output voltage and the first reference voltage for receiving and comparing the inverter, to export first
Signal；
The first signal that first delay circuit is exported according to the first comparator is charged, and is prolonged with changing described first
When circuit output voltage；
Second comparator is used to receive and compare the second reference voltage and the output voltage of first delay circuit, with defeated
Go out signal identical with the output signal of the first comparator；
The output end of second comparator is connected with the prime control chip of the inverter, the prime control chip according to
The signal of the two comparators output controls the working condition of the inverter.
2. protection circuit as claimed in claim 1, it is characterised in that the in-phase input end of the first comparator and anti-phase defeated
Enter output voltage and the first reference voltage that end is respectively connected to the inverter, the protection circuit also includes being connected to inverter
Output end second voltage protection circuit, the second voltage protection circuit include sequentially connect the 3rd comparator, second
Delay circuit and the 4th comparator, wherein,
The in-phase input end and inverting input of 3rd comparator are respectively connected to the 3rd reference voltage and the inverter
Output voltage, output voltage and the 3rd reference voltage for comparing the inverter, to export secondary signal, the 3rd base
Quasi- voltage is less than the first reference voltage；
The secondary signal that second delay circuit is exported according to the 3rd comparator is charged, to change the second delay electricity
The output voltage on road；
4th comparator is used for the output voltage for receiving and comparing the 4th reference voltage and second delay circuit, with defeated
Go out the output signal identical signal with the 3rd comparator；
The output end of 4th comparator is connected with the prime control chip of the inverter, the prime control chip according to
The signal of second comparator and the 4th the comparator output controls the working condition of the inverter.
3. protection circuit as claimed in claim 2, it is characterised in that when the first comparator exports high level signal,
The first delay circuit charging, so that the voltage of first delay circuit output is more than second reference voltage, it is described
Second comparator exports high level signal, and the prime control chip controls the inverter to be stopped；
When the 3rd comparator exports high level signal, the second delay circuit charging, so that the second delay electricity
The voltage of road output is more than the 4th reference voltage, and the 4th comparator exports high level signal, the prime control chip control
The inverter is made to be stopped；
When the first comparator and the 3rd comparator export low level signal, first delay circuit and the second delay
Circuit does not charge, the inverter work.
4. protection circuit as claimed in claim 2, it is characterised in that the in-phase input end and anti-phase input of two comparator
End is respectively connected to the voltage and second reference voltage of the first delay circuit output；The in-phase input end of 4th comparator
The voltage and the 4th reference voltage of the output of the second delay circuit are respectively connected to inverting input.
5. protection circuit as claimed in claim 2, it is characterised in that first delay circuit and the second delay circuit are wrapped
Include the pull-up resistor being connected in series and a ground capacity.
6. protection circuit as claimed in claim 2, it is characterised in that the first voltage protection circuit also include respectively with institute
The first reference voltage generating circuit and the second reference voltage generating circuit of first comparator and the connection of the second comparator are stated, it is described
First reference voltage generating circuit and the second reference voltage generating circuit include two the first divider resistances；The second voltage
Protection circuit also includes the 3rd reference voltage generating circuit that is connected respectively with the 3rd comparator and the 4th comparator and the
Four reference voltage generating circuits, the 3rd reference voltage generating circuit and the 4th reference voltage generating circuit include two the
Two divider resistances.
7. protection circuit as claimed in claim 2, it is characterised in that be also connected to second comparator including two
With the first diode of the output end of the 4th comparator, two first diodes control core with the prime of the inverter
Piece is connected.
8. protection circuit as claimed in claim 2, it is characterised in that also including bleeder circuit and current rectifying and wave filtering circuit, described
The input and output end of bleeder circuit are connected with the inverter and earth terminal respectively, include the 3rd partial pressure electricity of two series connection
Resistance, between the input of the current rectifying and wave filtering circuit and two the 3rd divider resistances node connection, output end with it is described
The input connection of first voltage protection circuit and second voltage protection circuit, the current rectifying and wave filtering circuit includes the second diode
And electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710419011.7A CN107171289A (en) | 2017-06-06 | 2017-06-06 | A kind of protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710419011.7A CN107171289A (en) | 2017-06-06 | 2017-06-06 | A kind of protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN107171289A true CN107171289A (en) | 2017-09-15 |
Family
ID=59825659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710419011.7A Pending CN107171289A (en) | 2017-06-06 | 2017-06-06 | A kind of protection circuit |
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| CN201112987Y (en) * | 2007-09-12 | 2008-09-10 | 王新涛 | Multinomial protection socket |
| CN202930916U (en) * | 2012-11-07 | 2013-05-08 | 深圳市振华微电子有限公司 | Switch power supply protection circuit |
| CN104078926A (en) * | 2013-03-29 | 2014-10-01 | 松下电器产业株式会社 | Circuit breaker and overvoltage-undervoltage tripping device |
| CN104868766A (en) * | 2014-02-26 | 2015-08-26 | 全汉企业股份有限公司 | Inversion device and AC power supply system applying same |
| CN205453086U (en) * | 2015-12-28 | 2016-08-10 | 浙江正泰电器股份有限公司 | Overvoltage and undervoltage protection tripping device |
| CN106357111A (en) * | 2016-09-28 | 2017-01-25 | 北京新能源汽车股份有限公司 | Vehicle-mounted DC/DC (direct current/direct current) output voltage feedback circuit and electric vehicle |
-
2017
- 2017-06-06 CN CN201710419011.7A patent/CN107171289A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201112987Y (en) * | 2007-09-12 | 2008-09-10 | 王新涛 | Multinomial protection socket |
| CN202930916U (en) * | 2012-11-07 | 2013-05-08 | 深圳市振华微电子有限公司 | Switch power supply protection circuit |
| CN104078926A (en) * | 2013-03-29 | 2014-10-01 | 松下电器产业株式会社 | Circuit breaker and overvoltage-undervoltage tripping device |
| CN104868766A (en) * | 2014-02-26 | 2015-08-26 | 全汉企业股份有限公司 | Inversion device and AC power supply system applying same |
| CN205453086U (en) * | 2015-12-28 | 2016-08-10 | 浙江正泰电器股份有限公司 | Overvoltage and undervoltage protection tripping device |
| CN106357111A (en) * | 2016-09-28 | 2017-01-25 | 北京新能源汽车股份有限公司 | Vehicle-mounted DC/DC (direct current/direct current) output voltage feedback circuit and electric vehicle |
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Application publication date: 20170915 |
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| RJ01 | Rejection of invention patent application after publication |