CN207732643U - Boost DC switching power supply - Google Patents
Boost DC switching power supply Download PDFInfo
- Publication number
- CN207732643U CN207732643U CN201820137476.3U CN201820137476U CN207732643U CN 207732643 U CN207732643 U CN 207732643U CN 201820137476 U CN201820137476 U CN 201820137476U CN 207732643 U CN207732643 U CN 207732643U
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- voltage
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- microcontroller
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Abstract
The utility model discloses a kind of Boost DC switching power supplies; including microcontroller, voltage input circuit, DC/DC conversion circuits and voltage follower circuit; DC/DC conversion circuits are BOOST switch DC booster circuits; microcontroller drives BOOST switch DC booster circuits by MOSFET driving circuits; the input of microcontroller is terminated with current foldback circuit and voltage sample adjusts circuit, and the input of microcontroller is terminated with the display for showing BOOST switch DC booster circuits output current, output voltage and output power.The utility model is novel in design, MOSFET driving circuits are directly controlled using microcontroller, and then it controls switching tube in BOOST switch DC booster circuits and turns on and off frequency, feedback, compensation and the voltage stabilizing that circuit realizes voltage output are adjusted using voltage sample, meet BOOST switch DC booster circuits boosting demand, voltage change number is few, reliable and stable.
Description
Technical field
The utility model belongs to switching power supply technical field, and in particular to a kind of Boost DC switch voltage-stabilizing electricity
Source.
Background technology
Switching Power Supply is a kind of high frequency device for converting electric energy built using modern power electronics technology, controls switching tube
The time ratio turned on and off, maintain to stabilize the output voltage, with the development and innovation of power electronic technique so that switch
Power technology is also constantly being innovated, Switching Power Supply miniaturization, light weight and be efficiently that Switching Power Supply adapts to various mini-plants
Objective and purpose, to adapt to the power supply power supply of various electronic apparatus, communication detection equipment.Boost DC switching power supply
It is to use the extensive power supply type of comparison in practice, existing Boost DC switching power supply technology is become using multiple voltage
Change, the loss in increasing circuit, and is easy to bring that circuit structure is complicated, volume is big, circuit adjusts unstable, high failure rate, at
The problems such as this height, efficiency is low.
Utility model content
The technical problem to be solved by the utility model is to the deficiencies in for the above-mentioned prior art, provide a kind of boosting
Type DC switching power supply, it is novel in design reasonable, MOSFET driving circuits are directly controlled using microcontroller, and then control
Switching tube turns on and off frequency in BOOST switch DC booster circuits, and adjusting circuit using voltage sample realizes that voltage is defeated
Feedback, compensation and the voltage stabilizing gone out meets BOOST switch DC booster circuits boosting demand, and voltage change number is few, and stabilization can
It leans on, convenient for promoting the use of.
In order to solve the above technical problems, the technical solution adopted in the utility model is：Boost DC switching power supply,
It is characterized in that：Including microcontroller and sequentially connected voltage input circuit, DC/DC conversion circuits and voltage output electricity
Road, DC/DC conversion circuits are BOOST switch DC booster circuits, and microcontroller passes through described in the driving of MOSFET driving circuits
The input of BOOST switch DC booster circuits, microcontroller is terminated with for acquiring the BOOST switch DCs booster circuit
Operating current simultaneously carries out the current foldback circuit of overcurrent protection to the BOOST switch DCs booster circuit and is used for described
The output voltage of BOOST switch DC booster circuits carries out feedback regulation compensation and the voltage sample of voltage stabilizing adjusts circuit, micro-control
The input of device processed is terminated with for showing the BOOST switch DCs booster circuit output current, output voltage and output power
Display；
The MOSFET driving circuits include high-speed MOSFET driver chip DEIC420, the high-speed MOSFET driver core
The VCC pins of piece DEIC420 divide two-way, are grounded all the way through capacitance C5, and another way connects 12V DC supply voltage；The high speed
The IN pins of MOSFET driving chips DEIC420 are connect with microcontroller, the EN of the high-speed MOSFET driver chip DEIC420
Pin divides two-way, is grounded all the way through resistance R6, and another way is connect with microcontroller.
Above-mentioned Boost DC switching power supply, it is characterised in that：The BOOST switch DCs booster circuit includes
Inductance L1, N-channel enhanced switch mosfet pipe Q1 and diode D1, the drain electrode of the enhanced switch mosfet pipe Q1 of N-channel with
One end of inductance L1 connects, and the drain electrode of the enhanced switch mosfet pipe Q1 of N-channel and the connecting pin of inductance L1 are with diode D1's
Anode connects, and the grid of the enhanced switch mosfet pipe Q1 of N-channel is through resistance R3's and high-speed MOSFET driver chip DEIC420
OUT pins connect.
Above-mentioned Boost DC switching power supply, it is characterised in that：The voltage input circuit includes low-voltage direct
Two-way is divided in voltage, two end interface P1 and diode D2, one end of the two end interfaces P1, all the way through diode D2's and inductance L1
The other end connects, and another way is grounded through capacitance C1；The other end of the two end interfaces P1 is grounded, and the low-voltage dc voltage is 6V
The anode of DC voltage, the 6V DC voltages is connect with one end of the two end interfaces P1, the cathode of the 6V DC voltages
It is connect with the other end of the two end interfaces P1.
Above-mentioned Boost DC switching power supply, it is characterised in that：The voltage follower circuit includes capacitance C4, two
Two-way is divided in one end of end interface P2 and high-voltage dc voltage, two end interface P2, connects all the way with the cathode of diode D1, another way
It is grounded through capacitance C4；The other end of two end interface P2 is grounded, and the high-voltage dc voltage is 9V DC voltages, two end interface P2's
One end is the anode of 9V DC voltages, and the other end of two end interface P2 is the cathode of 9V DC voltages.
Above-mentioned Boost DC switching power supply, it is characterised in that：The current foldback circuit includes amplifier U1, institute
The in-phase input end for stating amplifier U1 divides two-way, is grounded all the way through capacitance C9, and another way connects with one end of resistance R5；Resistance R5's
The other end divides two-way, is grounded all the way through resistance R9, and another way connects with the source electrode of the enhanced switch mosfet pipe Q1 of N-channel；Institute
State the inverting input of amplifier U1 to be grounded through resistance R13, three tunnels of output end point of the amplifier U1, all the way with microcontroller phase
It connects, another way connects through resistance R19 with the inverting input of amplifier U1, and third road is through resistance R12's and capacitance C7 and amplifier U1
Inverting input connects.
Above-mentioned Boost DC switching power supply, it is characterised in that：It includes amplifier that the voltage sample, which adjusts circuit,
The U2 and resistance R2 being sequentially connected in series, variable resistance R1 and resistance R7, resistance R2 one end and diode far from variable resistance R1
The cathode of D1 connects, one end ground connection of the resistance R7 far from variable resistance R1, the in-phase input end and variable resistance of the amplifier U2
The connecting pin of R1 and resistance R7 connect, and the inverting input of the amplifier U2 is grounded through resistance R14, the output end of the amplifier U2
Divide three tunnels, connects all the way with microcontroller, another way connects through resistance R8 with the inverting input of amplifier U2, and third road is through capacitance
C6 and resistance R11 connect with the inverting input of amplifier U2.
Above-mentioned Boost DC switching power supply, it is characterised in that：The microcontroller is MSP430F149 chips.
Above-mentioned Boost DC switching power supply, it is characterised in that：The display is TFT LCD.
The utility model has the following advantages compared with prior art：
1, the utility model DC/DC conversion circuits realize the liter of power supply using typical BOOST switch DCs booster circuit
Function is pressed, drives switching tube in BOOST switch DC booster circuits to turn on and off using MOSFET driving circuits, circuit letter
Single, small, circuit, which is adjusted, to be stablized, at low cost, efficient, convenient for promoting the use of.
2, the utility model carries out overcurrent protection by the way that current foldback circuit is arranged to BOOST switch DC booster circuits,
When the voltage magnitude of overcurrent protection circuit sampling transfinites, the overturning of current foldback circuit state makes switching tube end, reaches control
The purpose of voltage output, reliable and stable, using effect is good；Circuit, which is adjusted, using voltage sample realizes the feedback of voltage output, benefit
It repays and voltage stabilizing, meets BOOST switch DC booster circuits boosting demand, voltage transformation number is few, convenient for safeguarding.
3, the utility model is novel in design rationally, utilizes display real-time display current flow, voltage and power, man-machine friendship
Mutual effect is good, can be used for normal power supply, can also be used as understanding of the experimental project training student to Switching Power Supply, be convenient for
It promotes the use of.
In conclusion the utility model is novel in design rationally to directly control MOSFET driving circuits using microcontroller, into
And control switching tube in BOOST switch DC booster circuits turns on and off frequency, utilizes voltage sample to adjust circuit and realizes
Feedback, compensation and the voltage stabilizing of voltage output meet BOOST switch DC booster circuits boosting demand, and voltage change number is few, surely
It is fixed reliable, convenient for promoting the use of.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Description of the drawings
Fig. 1 is the schematic block circuit diagram of the utility model.
Fig. 2 is the circuit diagram of the utility model.
Reference sign:
1-voltage input circuit；2-DC/DC conversion circuits；3-voltage follower circuits；
4-current foldback circuits；5-voltage samples adjust circuit；6-microcontrollers；
7-MOSFET driving circuits；8-displays.
Specific implementation mode
As depicted in figs. 1 and 2, the utility model includes microcontroller 6 and sequentially connected voltage input circuit 1, DC/
DC conversion circuits 2 and voltage follower circuit 3, DC/DC conversion circuits 2 are BOOST switch DC booster circuits, and microcontroller 6 is logical
Crossing MOSFET driving circuits 7 drives the BOOST switch DCs booster circuit, the input of microcontroller 6 to be terminated with for acquiring
The operating current of the BOOST switch DCs booster circuit simultaneously carries out overcurrent protection to the BOOST switch DCs booster circuit
Current foldback circuit 4 and for carrying out feedback regulation compensation simultaneously to the output voltage of the BOOST switch DCs booster circuit
The voltage sample of voltage stabilizing adjusts circuit 5, and the input of microcontroller 6 is terminated with for showing the BOOST switch DCs boosting electricity
The display 8 of road output current, output voltage and output power；
The MOSFET driving circuits 7 include high-speed MOSFET driver chip DEIC420, the high-speed MOSFET driver core
The VCC pins of piece DEIC420 divide two-way, are grounded all the way through capacitance C5, and another way connects 12V DC supply voltage；The high speed
The IN pins of MOSFET driving chips DEIC420 are connect with microcontroller 6, the high-speed MOSFET driver chip DEIC420's
EN pins divide two-way, are grounded all the way through resistance R6, and another way is connect with microcontroller 6.
It should be noted that MOSFET driving circuits are directly controlled using microcontroller 6, and then it is straight to control BOOST switches
Switching tube turns on and off frequency in stream booster circuit, directly reliable, is switched to BOOST by the way that current foldback circuit 4 is arranged
DC voltage booster circuit carries out overcurrent protection, when the voltage magnitude of overcurrent protection circuit sampling transfinites, 4 state of current foldback circuit
Overturning, makes switching tube end, and achievees the purpose that control voltage output, reliable and stable, using effect is good；It is adjusted using voltage sample
Circuit 5 realizes feedback, compensation and the voltage stabilizing of voltage output, meets BOOST switch DC booster circuits boosting demand, voltage transformation
Number is few, convenient for safeguarding；It is good using 8 real-time display current flow of display, voltage and power, man-machine interaction effect.
In actual use, using high-speed MOSFET driver chip DEIC420 as the master chip of MOSFET driving circuits 7,
High-speed MOSFET driver chip DEIC420 pins are few, and control is simple, using microcontroller 6 to high-speed MOSFET driver chip
The input terminal of DEIC420 inputs pwm signal, while microcontroller 6 controls high-speed MOSFET driver chip DEIC420 and enables, electricity
Road is simple, easily controllable.
In the present embodiment, the voltage input circuit 1 includes low-voltage dc voltage, two end interface P1 and diode D2, institute
Two-way is divided in the one end for stating two end interface P1, connects all the way with the other end of inductance L1 through diode D2, another way connects through capacitance C1
Ground；The other end of the two end interfaces P1 is grounded, and the low-voltage dc voltage is 6V DC voltages, and the 6V DC voltages are just
Pole is connect with one end of the two end interfaces P1, and the cathode of the 6V DC voltages and the other end of the two end interfaces P1 connect
It connects.
It should be noted that the capacitance C1 in voltage input circuit 1 is input capacitance, since BOOST switch DCs boost
Circuit has continuous input current, input capacitance to can detect inductance ripple current, in actual use, the voltage input circuit 1
Voltage be chosen for 6V DC voltages, 6V DC voltages by two end interface P1 be input to BOOST switch DCs booster circuit into
Row boosting, preferred capacitance C1 select 10 μ F capacitances to reduce inductance ripple current.
In the present embodiment, the BOOST switch DCs booster circuit includes inductance L1, the enhanced switch mosfet of N-channel
The drain electrode of pipe Q1 and diode D1, the enhanced switch mosfet pipe Q1 of N-channel connect with one end of inductance L1, and N-channel is enhanced
The drain electrode of switch mosfet pipe Q1 and the connecting pin of inductance L1 connect with the anode of diode D1, and the enhanced MOSFET of N-channel is opened
The grid for closing pipe Q1 connects through resistance R3 with the OUT pins of high-speed MOSFET driver chip DEIC420.
It should be noted that DC/DC conversion circuits realize the liter of power supply using typical BOOST switch DCs booster circuit
Function is pressed, the enhanced MOSFET of N-channel in the output end driving BOOST switch DC booster circuits of MOSFET driving circuits is utilized
Switching tube Q1's turns on and off, and circuit is simple, and small, circuit, which is adjusted, to be stablized, at low cost, efficient；BOOST switch DCs
Inductance L1 plays energy storage in booster circuit, and the preferred inductance L1 of the present embodiment takes 22 μ H to limit the ripple of maximum output current
30%.
In the present embodiment, the voltage follower circuit 3 includes capacitance C4, two end interface P2 and high-voltage dc voltage, both ends
Two-way is divided in one end of interface P2, connects all the way with the cathode of diode D1, and another way is grounded through capacitance C4；Two end interface P2's is another
One end is grounded, and the high-voltage dc voltage is 9V DC voltages, and one end of two end interface P2 is the anode of 9V DC voltages, both ends
The other end of interface P2 is the cathode of 9V DC voltages.
It should be noted that purpose is by 6V dc voltage boosts to 9V DC voltages, voltage output electricity in the present embodiment
Capacitance C4 in road 3 can play reduction output ripple, increase the capacitance of capacitance C4 and can reduce ripple, in order to meet output ripple
440 μ F are taken with the capacitance of the needs of transient response, preferred capacitance C4, and capacitance C4 uses solid capacitor.
In the present embodiment, the current foldback circuit 4 includes amplifier U1, and the in-phase input end of the amplifier U1 divides two-way,
It is grounded all the way through capacitance C9, another way connects with one end of resistance R5；The other end of resistance R5 divides two-way, is connect all the way through resistance R9
Ground, another way connect with the source electrode of the enhanced switch mosfet pipe Q1 of N-channel；The inverting input of the amplifier U1 is through resistance
R13 is grounded, and three tunnels of output end point of the amplifier U1 connect with microcontroller 6, another way is through resistance R19 and amplifier U1 all the way
Inverting input connect, third road connects through resistance R12 and capacitance C7 with the inverting input of amplifier U1.
It should be noted that the effect of resistance R5 is to sample the output current of BOOST switch DC booster circuits, electricity is utilized
The output current of BOOST switch DC booster circuits is converted to voltage value by resistance R5, and is sent to the in-phase input end of amplifier U1,
The in-phase input end and anti-phase input terminal voltage for comparing amplifier U1, if amplifier U1 homophase input terminal voltages are more than inverting input,
Then amplifier U1 exports high level, and it is enhanced that microcontroller 6 controls high-speed MOSFET driver chip DEIC420 shutdown N-channels
Switch mosfet pipe Q1, and then realize the adjusting of output voltage.
In the present embodiment, the voltage sample adjust circuit 5 include the amplifier U2 and resistance R2 being sequentially connected in series, can power transformation
R1 and resistance R7 is hindered, the one end of resistance R2 far from variable resistance R1 connects with the cathode of diode D1, and resistance R7 is separate can power transformation
One end ground connection of R1 is hindered, the in-phase input end of the amplifier U2 connects with the connecting pin of variable resistance R1 and resistance R7, the fortune
The inverting input for putting U2 is grounded through resistance R14, and three tunnels of output end point of the amplifier U2 connect with microcontroller 6, separately all the way
Connect all the way with the inverting input of amplifier U2 through resistance R8, third road is defeated through capacitance C6 and resistance R11 and the reverse phase of amplifier U2
Enter end to connect.
It should be noted that the resistance R2 being sequentially connected in series, variable resistance R1 and resistance R7 play the role of resitstance voltage divider,
Amplifier U2 feeds back to microcontroller 6, microcontroller 6 using the output voltage of resistance R4 sampling BOOST switch DC booster circuits
According to output voltage size and then control the high-speed MOSFET driver chip DEIC420 driving enhanced switch mosfet pipes of N-channel
The switching frequency of Q1, variable resistance R1 can realize the fine tuning of output voltage, meet different loading demands.
In the present embodiment, the microcontroller 6 is MSP430F149 chips.
In the present embodiment, the display 8 is TFT LCD.
When the utility model is used, voltage input circuit 1 accesses input voltage, i.e. 6V DC voltages, DC/DC conversion circuits
2 pairs of 6V DC voltages boost, and PWM wave enabled MOSFET drives simultaneously are inputted to MOSFET driving circuits 7 using microcontroller 6
Dynamic circuit 7 is carried out switch-mode regulation to the enhanced switch mosfet pipe Q1 of N-channel in DC/DC conversion circuits 2, is protected using overcurrent
Protection circuit 4 acquires output current, and adjusting circuit 5 using voltage sample acquires output voltage, and output electricity is shown using display 8
Stream, output voltage and output power, when output current is excessive, amplifier U1 is to 6 input high level of microcontroller, microcontroller 6
Control N-channel enhanced switch mosfet pipe Q1 shutdown, and then adjust output voltage, when output voltage is excessive, amplifier U2 to
6 input high level of microcontroller, microcontroller 6 adjust the enhanced switch mosfet pipe Q1 working frequencies of N-channel, realize output electricity
The automatic stabilisation of pressure is adjusted, and achievees the effect that voltage stabilizing.
The above is only the preferred embodiment of the utility model, not imposed any restrictions to the utility model, every
Any simple modification, change and equivalent structure made by above example are changed according to the utility model technical spirit, still
Belong in the protection domain of technical solutions of the utility model.
Claims (8)
1. Boost DC switching power supply, it is characterised in that：Including microcontroller (6) and sequentially connected control source
Circuit (1), DC/DC conversion circuits (2) and voltage follower circuit (3), DC/DC conversion circuits (2) boost for BOOST switch DCs
Circuit, microcontroller (6) drive the BOOST switch DCs booster circuit, microcontroller by MOSFET driving circuits (7)
(6) input is terminated with the operating current for acquiring the BOOST switch DCs booster circuit and is switched to the BOOST straight
It flows booster circuit and carries out the current foldback circuit (4) of overcurrent protection and for the defeated of the BOOST switch DCs booster circuit
Go out the voltage sample adjusting circuit (5) that voltage carries out feedback regulation compensation and voltage stabilizing, the input of microcontroller (6), which is terminated with, to be used for
Show the display (8) of the BOOST switch DCs booster circuit output current, output voltage and output power；
The MOSFET driving circuits (7) include high-speed MOSFET driver chip DEIC420, the high-speed MOSFET driver chip
The VCC pins of DEIC420 divide two-way, are grounded all the way through capacitance C5, and another way connects 12V DC supply voltage；The high speed
The IN pins of MOSFET driving chips DEIC420 are connect with microcontroller (6), the high-speed MOSFET driver chip DEIC420
EN pins divide two-way, be grounded all the way through resistance R6, another way connect with microcontroller (6).
2. Boost DC switching power supply described in accordance with the claim 1, it is characterised in that：The BOOST switch DCs
Booster circuit includes inductance L1, N-channel enhanced switch mosfet pipe Q1 and diode D1, the enhanced switch mosfet of N-channel
The drain electrode of pipe Q1 connects with one end of inductance L1, the connecting pin of the drain electrode and inductance L1 of the enhanced switch mosfet pipe Q1 of N-channel
Connect with the anode of diode D1, the grid of the enhanced switch mosfet pipe Q1 of N-channel is through resistance R3 and high-speed MOSFET driver
The OUT pins of chip DEIC420 connect.
3. Boost DC switching power supply according to claim 2, it is characterised in that：The voltage input circuit
(1) include low-voltage dc voltage, two end interface P1 and diode D2, two-way is divided in one end of the two end interfaces P1, all the way through two
Pole pipe D2 connects with the other end of inductance L1, and another way is grounded through capacitance C1；The other end of the two end interfaces P1 is grounded, described
Low-voltage dc voltage is 6V DC voltages, and the anode of the 6V DC voltages is connect with one end of the two end interfaces P1, described
The cathode of 6V DC voltages is connect with the other end of the two end interfaces P1.
4. Boost DC switching power supply according to claim 2, it is characterised in that：The voltage follower circuit
(3) include capacitance C4, two end interface P2 and high-voltage dc voltage, two-way is divided in one end of two end interface P2, all the way with diode D1
Cathode connect, another way through capacitance C4 be grounded；The other end of two end interface P2 is grounded, and the high-voltage dc voltage is 9V direct currents
Voltage, one end of two end interface P2 are the anode of 9V DC voltages, and the other end of two end interface P2 is the cathode of 9V DC voltages.
5. Boost DC switching power supply according to claim 2, it is characterised in that：The current foldback circuit
(4) include amplifier U1, the in-phase input end of the amplifier U1 divides two-way, is grounded all the way through capacitance C9, and another way is with resistance R5's
One end connects；The other end of resistance R5 divides two-way, is grounded all the way through resistance R9, another way and the enhanced switch mosfet of N-channel
The source electrode of pipe Q1 connects；The inverting input of the amplifier U1 is grounded through resistance R13, three tunnels of output end point of the amplifier U1,
Connect all the way with microcontroller (6), another way connects through resistance R19 with the inverting input of amplifier U1, and third road is through resistance R12
Connect with the inverting input of amplifier U1 with capacitance C7.
6. Boost DC switching power supply according to claim 2, it is characterised in that：The voltage sample adjusts electricity
Road (5) includes the amplifier U2 and resistance R2 being sequentially connected in series, variable resistance R1 and resistance R7, and resistance R2 is far from variable resistance R1's
One end connects with the cathode of diode D1, one end ground connection of the resistance R7 far from variable resistance R1, the homophase input of the amplifier U2
End connects with the connecting pin of variable resistance R1 and resistance R7, and the inverting input of the amplifier U2 is grounded through resistance R14, the fortune
Three tunnels of output end point for putting U2, connect with microcontroller (6) all the way, inverting input phase of the another way through resistance R8 and amplifier U2
It connects, third road connects through capacitance C6 and resistance R11 with the inverting input of amplifier U2.
7. Boost DC switching power supply described in accordance with the claim 1, it is characterised in that：The microcontroller (6) is
MSP430F149 chips.
8. Boost DC switching power supply described in accordance with the claim 1, it is characterised in that：The display (8) is TFT
Liquid crystal display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820137476.3U CN207732643U (en) | 2018-01-26 | 2018-01-26 | Boost DC switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820137476.3U CN207732643U (en) | 2018-01-26 | 2018-01-26 | Boost DC switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207732643U true CN207732643U (en) | 2018-08-14 |
Family
ID=63081800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820137476.3U Expired - Fee Related CN207732643U (en) | 2018-01-26 | 2018-01-26 | Boost DC switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207732643U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020113757A1 (en) * | 2018-12-07 | 2020-06-11 | 深圳市华星光电半导体显示技术有限公司 | Over-current protection circuit, backlight module and display device |
| CN112332823A (en) * | 2020-10-19 | 2021-02-05 | 北京动力源科技股份有限公司 | Direct current switch |
| CN114120896A (en) * | 2021-12-03 | 2022-03-01 | 合肥新沪屏蔽泵有限公司 | LED indicates HPB bearing wearing and tearing gauge outfit for canned motor pump |
-
2018
- 2018-01-26 CN CN201820137476.3U patent/CN207732643U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020113757A1 (en) * | 2018-12-07 | 2020-06-11 | 深圳市华星光电半导体显示技术有限公司 | Over-current protection circuit, backlight module and display device |
| CN112332823A (en) * | 2020-10-19 | 2021-02-05 | 北京动力源科技股份有限公司 | Direct current switch |
| CN112332823B (en) * | 2020-10-19 | 2024-01-26 | 北京动力源科技股份有限公司 | DC switch |
| CN114120896A (en) * | 2021-12-03 | 2022-03-01 | 合肥新沪屏蔽泵有限公司 | LED indicates HPB bearing wearing and tearing gauge outfit for canned motor pump |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180814 Termination date: 20190126 |
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| CF01 | Termination of patent right due to non-payment of annual fee |