CN107516873A - Inverter and inverter protection device - Google Patents
Inverter and inverter protection device Download PDFInfo
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- CN107516873A CN107516873A CN201710968699.4A CN201710968699A CN107516873A CN 107516873 A CN107516873 A CN 107516873A CN 201710968699 A CN201710968699 A CN 201710968699A CN 107516873 A CN107516873 A CN 107516873A
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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
- H02H7/1225—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 responsive to internal faults, e.g. shoot-through
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention provides a kind of inverter and inverter protection device, it is related to electronic circuit field.The inverter protection device includes power module, IGBT turning-on voltages detection means and master control borad, power module, IGBT turning-on voltages detection means and master control borad are sequentially connected electrically, the conducting voltage of itself is exported by IGBT turning-on voltage detection means and produces reference voltage, compare conducting voltage and reference voltage again, if conducting voltage generates fault-signal when being more than reference voltage, and fault-signal is transmitted to master control borad, master control borad is used to block IGBT pulse pwm signals after receiving fault-signal, now IGBT is turned off, so as to prevent that IGBT work is abnormal or even burns, and overall strong antijamming capability, it is stable and reliable for performance, it is simple in construction, manufacturing cost is low.
Description
Technical field
The present invention relates to electronic circuit field, in particular to a kind of inverter and inverter protection device.
Background technology
Track train is most important traffic machine instrument in human history, there is independent rail running.Railroad train is pressed
Load thing, the lorry of cargo transport and the car of carrying can be divided into；Also there are both passenger-cargo carriages together, play and focus in modern transportation
The effect wanted.Track train inverter selection insulated gate bipolar transistor (Insulated Gate Bipolar
Transistor, IGBT) power device is used as, IGBT can regard a switch as, non-through i.e. disconnected, and control its break-make to lean on
Be exactly grid emitter-base bandgap grading voltage, when grid emitter-base bandgap grading adds positive voltage (generally+12V~+15V), IGBT is turned on, and this is that IGBT is open-minded
Voltage.For track train IGBT of the prior art in opening process, the size, stability for grid emitter voltage are very quick
Sense, it is necessary in a suitable scope, otherwise may cause IGBT cisco unity malfunctions, or even burn.
The content of the invention
It is an object of the invention to provide a kind of inverter and inverter protection device, and it is intended to improve the problem of above-mentioned.
In a first aspect, the embodiments of the invention provide a kind of inverter protection device, including power module, IGBT to open electricity
Detection means and master control borad are pressed, the power module, the IGBT turning-on voltages detection means and the master control borad are successively
Electrical connection, the power module are used to provide IGBT turning-on voltages and circuit work for the IGBT turning-on voltages detection means
Voltage, the IGBT turning-on voltages detection means are used to export the conducting voltage of itself and produce reference voltage, then relatively more described
Conducting voltage and the reference voltage, if the conducting voltage generates fault-signal when being more than the reference voltage, and by failure
Signal is transmitted to the master control borad, and the master control borad is used to block IGBT pulse pwm signals after receiving the fault-signal.
Further, the IGBT turning-on voltages detection means include voltage turn-on module, reference voltage generation module with
And voltage comparison process module, the voltage turn-on module, the reference voltage generation module are relatively located with the voltage ratio respectively
Manage module electrical connection, the power module respectively with the voltage turn-on module, the reference voltage generation module and described
Voltage comparison process module electrically connects, and the voltage turn-on module is used to export the conducting voltage of itself, the reference voltage production
Raw module is used to produce reference voltage, if the voltage comparison process module is more than the reference voltage for the conducting voltage
Shi Shengcheng fault-signals, and fault-signal is transmitted to the master control borad.
Further, the voltage turn-on module includes voltage-stabiliser tube and optocoupler, and the power module includes first voltage
Output end, second voltage output end, the first voltage output end, the voltage-stabiliser tube, the optocoupler and the second voltage
Output end is sequentially connected electrically, and the voltage-stabiliser tube is used to turn on when more than presetting voltage threshold, and the optocoupler is used in institute
Enter working condition after stating voltage-stabiliser tube conducting, the optocoupler is used to export conducting voltage.
Further, the voltage turn-on module also includes potentiometer, the first voltage output end, the potentiometer with
And the voltage-stabiliser tube is sequentially connected electrically.
Further, the reference voltage generation module includes voltage reference chip, and the power module also includes second
Voltage output end, the negative pole ground connection of the voltage reference chip, the positive pole of the voltage reference chip are electric with described second respectively
Press the positive pole electrical connection of output end, the operational amplifier.
Further, the reference voltage generation module also includes first resistor, the first electric capacity and the second electric capacity, described
First electric capacity, second electric capacity and the voltage reference chip are in parallel, and the positive pole of first electric capacity respectively with it is described
One end electrical connection of second voltage output end, the first resistor, the other end of the first resistor are electric with described second respectively
The positive pole of appearance, the voltage reference chip positive pole electrical connection, the negative pole of first electric capacity, second electric capacity negative pole with
And the negative pole ground connection of the voltage reference chip.
Further, the power module also include second voltage output end, tertiary voltage output end, the voltage ratio compared with
Processing module includes operational amplifier, 3rd resistor, and the output end of the operational amplifier electrically connects with the 3rd resistor, institute
The one of pin for stating operational amplifier electrically connects with the tertiary voltage output end.
Further, the voltage comparison process module also includes light emitting diode, the light emitting diode and described the
Three resistant series are between second voltage output end and the output end of the operational amplifier.
Further, the voltage comparison process module also includes the 3rd electric capacity, one end of the 3rd electric capacity with it is described
The negative pole electrical connection of operational amplifier, the other end ground connection of the 3rd electric capacity.
Second aspect, the embodiment of the present invention additionally provide a kind of inverter, including above-mentioned inverter protection device.
The beneficial effect of inverter and inverter protection device provided by the invention is：The inverter protection device passes through
IGBT turning-on voltage detection means exports the conducting voltage of itself and produces reference voltage, then compares conducting voltage and benchmark electricity
Pressure, if conducting voltage generates fault-signal when being more than reference voltage, and fault-signal is transmitted to master control borad, master control borad is used to connect
IGBT pulse pwm signals are blocked after receiving fault-signal, now IGBT is turned off, so as to prevent that IGBT work is abnormal or even burns
Ruin, and overall strong antijamming capability, stable and reliable for performance, simple in construction, manufacturing cost is low.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is that the circuit of inverter protection device provided in an embodiment of the present invention connects block diagram；
Fig. 2 is the circuit diagram of IGBT turning-on voltages detection means provided in an embodiment of the present invention.
Icon：101- power modules；102-IGBT turning-on voltage detection means；103- master control borads；104- voltage turn-on moulds
Block；105- reference voltage generation modules；106- voltage comparison process modules.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.The present invention implementation being generally described and illustrated herein in the accompanying drawings
The component of example can be configured to arrange and design with a variety of.
Therefore, below the detailed description of the embodiments of the invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.It is common based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.
In the description of the invention, it is to be understood that term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, or should
Invention product using when the orientation usually put or position relationship, or the orientation or position that those skilled in the art usually understand
Relation is put, it is of the invention necessary with simplified description, rather than the equipment or element of instruction or hint meaning to be for only for ease of description
With specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and it is not intended that instruction or hint
Relative importance.
In the description of the invention, it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ",
" installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or one
Connect body；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirect by intermediary
It is connected, can is the connection of two element internals.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
Embodiment
To be opened referring to Fig. 1, the embodiments of the invention provide a kind of inverter protection device, including power module 101, IGBT
Logical voltage check device 102 and master control borad 103.Power module 101, IGBT turning-on voltages detection means 102 and master control borad
103 are sequentially connected electrically.Power module 101 is used to provide IGBT turning-on voltages and electricity for IGBT turning-on voltages detection means 102
Road operating voltage, in the present embodiment, power module 101 provides three tunnel voltage outputs, first voltage output end output+VCC1, the
Two voltage output end output+5V and tertiary voltage output end output+VCC2, and three road output voltages are independent power supply mould
Formula.
IGBT turning-on voltages detection means 102 is used to export the conducting voltage of itself and produces reference voltage, then compares and lead
Be powered pressure and reference voltage, if conducting voltage generates fault-signal when being more than reference voltage, and fault-signal is transmitted to master control
Plate 103, master control borad 103 are used to block IGBT pulse pwm signals after receiving fault-signal.
Specifically, IGBT turning-on voltages detection means 102 includes voltage turn-on module 104, reference voltage generation module 105
And voltage comparison process module 106.Voltage turn-on module 104, reference voltage generation module 105 are relatively handled with voltage ratio respectively
Module 106 electrically connects, power module 101 respectively with voltage turn-on module 104, reference voltage generation module 105 and voltage ratio
Electrically connected compared with processing module 106.
Voltage turn-on module 104 is used to export the conducting voltage of itself, and reference voltage generation module 105 is used to produce benchmark
Voltage, if voltage comparison process module 106 generates fault-signal when being more than reference voltage for conducting voltage, and by fault-signal
Transmit to master control borad 103.
Specifically, as shown in Fig. 2 voltage turn-on module 104 includes voltage-stabiliser tube V1 and optocoupler U1, first voltage output
End, voltage-stabiliser tube V1, optocoupler U1 and second voltage output end are sequentially connected electrically.Voltage-stabiliser tube V1 is used for more than presetting voltage
Turned on during threshold value, optocoupler U1 is used to after voltage-stabiliser tube V1 conductings enter working condition, and optocoupler U1 is used to export conducting voltage.This reality
Apply in example, optocoupler U1 includes first input end, the second input, the first output end and the second output end, first input end with
Voltage-stabiliser tube V1 positive pole electrical connection, the second input end grounding, the first output head grounding, the second output end are defeated with second voltage respectively
Go out end and voltage comparison process module 106 electrically connects.
After voltage-stabiliser tube V1 conductings, the voltage at both ends is burning voltage, can prevent from being added to optocoupler U1 first input end and the
The voltage of light emitting diode D1 between two inputs is more than conducting voltage, so as to avoid optocoupler U1 from damaging, also functions to as light
The effect of coupling U1 luminous tube current limliting.The voltage that voltage-stabiliser tube V1 is output to when first voltage output end is reverse more than voltage-stabiliser tube V1
During breakdown voltage, voltage-stabiliser tube V1 conductings, now optocoupler U1 enters working condition；When first voltage output end is output to voltage-stabiliser tube V1
Voltage when being less than voltage-stabiliser tube V1 breakdown reverse voltage, voltage-stabiliser tube V1 cut-offs, optocoupler U1 do not work.
Voltage turn-on module also includes potentiometer RP1, second resistance R2, first voltage output end, potentiometer RP1 and steady
Pressure pipe V1 is sequentially connected electrically, and second resistance R2 one end electrically connects with second voltage output end, the second resistance R2 other end point
Do not electrically connected with optocoupler U1 the second output end and voltage comparison process module 106.In the present embodiment, in specific works,
According to the turning-on voltage rotection thresholds of default IGBT turning-on voltages detection means 102 carry out voltage-stabiliser tube V1, potentiometer RP1 and
Optocoupler U1 type selecting, because voltage-stabiliser tube V1 has certain dispersiveness, it can be opened by adjusting potentiometer RP1 resistance IGBT
The rotection thresholds of the turning-on voltage of logical voltage check device are more accurate, and the second output end voltage is equal to second when optocoupler U1 is turned on
Voltage output terminal voltage.Second resistance R2 is pull-up resistor.
Specifically, reference voltage generation module 105 includes voltage reference chip U2, wherein, voltage reference chip U2 can be with
2.5V reference voltage sources+2.5Vref is provided.Power module 101 also includes second voltage output end, and voltage reference chip U2's is negative
Pole is grounded, and voltage reference chip U2 positive pole electrically connects with operational amplifier N1 positive pole.
Reference voltage generation module 105 also includes first resistor R1, the first electric capacity C1 and the second electric capacity C2, the second electric capacity
C2 is in parallel with voltage reference chip U2, the first electric capacity C1 positive pole respectively with second voltage output end, first resistor R1 one end
Electrical connection, the positive pole with the second electric capacity C2, voltage reference chip U2 positive pole electrically connect the first resistor R1 other end respectively, the
The negative pole ground connection of one electric capacity C1 negative pole, the second electric capacity C2 negative pole and voltage reference chip U2, due to optocoupler U1 isolation,
The negative pole of first electric capacity C1 negative pole, the second electric capacity C2 negative pole and voltage reference chip U2 is defeated with the second of optocoupler U1 respectively
Enter end and be in non-state altogether.First resistor R1 and the first electric capacity C1, the second electric capacity C2 can control the generation time of reference voltage.
Power module 101 also includes tertiary voltage output end, voltage comparison process module 106 include operational amplifier N1,
3rd resistor R3.Operational amplifier N1 includes 8 pins, respectively the first pin, the second pin, three-prong, the 4th pin,
5th pin, the 6th pin, the 7th pin and the 8th pin.Wherein, the second pin and three-prong are respectively operation amplifier
Device N1 positive pole, negative pole.Operational amplifier N1 output end electrically connects with 3rd resistor R3, operational amplifier N1 the 8th pin
Electrically connected with tertiary voltage output end.Operational amplifier N1 the 4th pin and the first pin short circuit, the 4th pin and the first pipe
Pin is grounded, the 5th pin and the 6th pin short circuit.
3rd resistor R3 is pull-up resistor, in addition, voltage comparison process module 106 also includes the 3rd electric capacity C3, the 3rd electricity
The one end for holding C3 is electrically connected with operational amplifier N1 three-prong, and the 3rd electric capacity C3 other end ground connection, the 3rd electric capacity C3 is used
In filtering.
Pass through optocoupler U1 the second output end and the conducting voltage of second voltage output end tie point and the ratio of reference voltage
Compared with if being low level when normal, if during failure being high level, master control borad 103 is used to block IGBT arteries and veins after receiving fault-signal
Rush pwm signal.
In addition, voltage comparison process module 106 can also include light emitting diode D1, light emitting diode D1 and 3rd resistor
R3 is series between second voltage output end and operational amplifier N1 output end, and operational amplifier N1 output end is the 7th
Pin, in failure, light emitting diode D1 is lighted.
During specific works, when the IGBT turning-on voltages+VCC1 that the first voltage output end of power module 101 provides is more than in advance
During the voltage protection threshold value of setting, IGBT turning-on voltage+VCC1 are more than voltage stabilizing by arriving voltage-stabiliser tube V1 voltage after potentiometer RP1
Pipe V1 breakdown reverse voltage, now voltage-stabiliser tube V1 conductings, optocoupler U1 work, the conducting voltage that voltage turn-on module 104 exports
For low level 0V, i.e., less than reference voltage+2.5Vref, the output signal of operational amplifier N1 output end (i.e. the 7th pin)
FAIL_+VCC1 is low level, and now light emitting diode D1 does not work, and is illustrating the voltage of IGBT turning-on voltages detection means 102 just
Often, IGBT is opened and normal work after receiving the pulse pwm signal that master control borad is sent.
When the IGBT turning-on voltages+VCC1 that the first voltage output end of power module 101 provides is less than presetting voltage
During rotection thresholds, IGBT turning-on voltage+VCC1 are reverse less than voltage-stabiliser tube V1 by the voltage that voltage-stabiliser tube V1 is arrived after potentiometer RP1
Breakdown voltage, now voltage-stabiliser tube V1 end, optocoupler U1 do not work, and the conducting voltage that voltage turn-on module 104 exports is high level
5V, more than reference voltage+2.5Vref, the signal FAIL_+ at operational amplifier N1 voltage output end (i.e. the 7th pin) place
VCC1 is high level, and now light emitting diode D1 is lighted, and illustrates that the turning-on voltage of IGBT turning-on voltages detection means 102 is abnormal,
Signal FAIL_+VCC1 fault-signal is transferred to master control borad 103, and master control borad 103 blocks IGBT arteries and veins after fault-signal is received
Rush pwm signal, IGBT shut-offs.
In addition, the embodiment of the present invention additionally provides a kind of inverter, including above-mentioned inverter protection device.
In summary, inverter and inverter protection device provided by the invention, IGBT turning-on voltage detection means is passed through
Export the conducting voltage of itself and produce reference voltage, then compare conducting voltage and reference voltage, if conducting voltage is more than benchmark
Fault-signal is generated during voltage, and fault-signal is transmitted to master control borad, master control borad is used to after receiving fault-signal block
IGBT pulse pwm signals, now IGBT shut-offs, so as to prevent that IGBT work is abnormal or even burns；If conducting voltage is less than base
Fault-signal is not generated during quasi- voltage, master control borad sends IGBT pulse pwm signals, and inverter is in normal operating conditions.This is inverse
Become device protection device and signal isolation is carried out by optocoupler, reference voltage level is produced using high-precision voltage reference chip, it is overall anti-
Interference performance is strong, stable and reliable for performance, simple in construction, and manufacturing cost is low.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of inverter protection device, it is characterised in that including power module, IGBT turning-on voltages detection means and master control
Plate, the power module, the IGBT turning-on voltages detection means and the master control borad are sequentially connected electrically, the power module
For providing IGBT turning-on voltages and circuit voltage for the IGBT turning-on voltages detection means, the IGBT opens electricity
Pressure detection means is used to export the conducting voltage of itself and produces reference voltage, then the conducting voltage and benchmark electricity
Pressure, if the conducting voltage generates fault-signal when being more than the reference voltage, and fault-signal is transmitted to the master control borad,
The master control borad is used to block IGBT pulse pwm signals after receiving the fault-signal.
2. inverter protection device according to claim 1, it is characterised in that the IGBT turning-on voltages detection means bag
Include voltage turn-on module, reference voltage generation module and voltage comparison process module, the voltage turn-on module, the benchmark
Voltage generating module electrically connects with the voltage comparison process module respectively, the power module respectively with the voltage turn-on mould
Block, the reference voltage generation module and voltage comparison process module electrical connection, the voltage turn-on module are used for defeated
Go out the conducting voltage of itself, the reference voltage generation module is used to produce reference voltage, and the voltage comparison process module is used
If generating fault-signal when the conducting voltage is more than the reference voltage, and fault-signal is transmitted to the master control borad.
3. inverter protection device according to claim 2, it is characterised in that the voltage turn-on module includes voltage-stabiliser tube
And optocoupler, the power module include first voltage output end, second voltage output end, the first voltage output end, institute
State voltage-stabiliser tube, the optocoupler and the second voltage output end to be sequentially connected electrically, the voltage-stabiliser tube is used for more than presetting
Voltage threshold when turn on, the optocoupler is used to enter working condition after voltage-stabiliser tube conducting, and the optocoupler is for exporting
Conducting voltage.
4. inverter protection device according to claim 3, it is characterised in that the voltage turn-on module also includes current potential
Device, the first voltage output end, the potentiometer and the voltage-stabiliser tube are sequentially connected electrically.
5. inverter protection device according to claim 2, it is characterised in that the reference voltage generation module includes electricity
Fiducial chip is pressed, the power module also includes second voltage output end, the negative pole ground connection of the voltage reference chip, the electricity
Positive pole of the positive pole of fiducial chip respectively with the second voltage output end, the operational amplifier is pressed to electrically connect.
6. inverter protection device according to claim 5, it is characterised in that the reference voltage generation module also includes
First resistor, the first electric capacity and the second electric capacity, second electric capacity is in parallel with the voltage reference chip, and first electricity
The one end of the positive pole of appearance respectively with the second voltage output end, the first resistor electrically connects, the first resistor it is another
The positive pole with second electric capacity, the positive pole of the voltage reference chip electrically connect respectively at end, the negative pole of first electric capacity, institute
State the negative pole of the second electric capacity and the negative pole ground connection of the voltage reference chip.
7. inverter protection device according to claim 2, it is characterised in that the power module also includes second voltage
Output end, tertiary voltage output end, the voltage comparison process module include operational amplifier, 3rd resistor, and the computing is put
The output end of big device electrically connects with the 3rd resistor, and the one of pin and the tertiary voltage of the operational amplifier are defeated
Go out end electrical connection.
8. inverter protection device according to claim 7, it is characterised in that the voltage comparison process module also includes
Light emitting diode, the light emitting diode are series at second voltage output end and the operational amplifier with the 3rd resistor
Between output end.
9. inverter protection device according to claim 7, it is characterised in that the voltage comparison process module also includes
3rd electric capacity, one end of the 3rd electric capacity electrically connect with the negative pole of the operational amplifier, the other end of the 3rd electric capacity
Ground connection.
10. a kind of inverter, it is characterised in that including any described inverter protection device of claim 1~9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710968699.4A CN107516873A (en) | 2017-10-18 | 2017-10-18 | Inverter and inverter protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710968699.4A CN107516873A (en) | 2017-10-18 | 2017-10-18 | Inverter and inverter protection device |
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| CN107516873A true CN107516873A (en) | 2017-12-26 |
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| CN201710968699.4A Pending CN107516873A (en) | 2017-10-18 | 2017-10-18 | Inverter and inverter protection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429537A (en) * | 2018-04-04 | 2018-08-21 | 北京动力源科技股份有限公司 | A kind of photovoltaic DC-to-AC converter fault logic circuits and electronic equipment |
| CN108429537B (en) * | 2018-04-04 | 2024-01-12 | 北京动力源科技股份有限公司 | Photovoltaic inverter fault processing circuit and electronic equipment |
| CN111405721A (en) * | 2019-11-13 | 2020-07-10 | 浙江凯耀照明有限责任公司 | Wireless control L ED intelligent power supply |
| CN111405721B (en) * | 2019-11-13 | 2021-12-03 | 浙江凯耀照明有限责任公司 | Wireless control LED intelligent power supply |
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Application publication date: 20171226 |
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| RJ01 | Rejection of invention patent application after publication |