CN212811369U - Power-down display holding circuit applied to frame circuit breaker - Google Patents

Power-down display holding circuit applied to frame circuit breaker Download PDF

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Publication number
CN212811369U
CN212811369U CN202021525849.8U CN202021525849U CN212811369U CN 212811369 U CN212811369 U CN 212811369U CN 202021525849 U CN202021525849 U CN 202021525849U CN 212811369 U CN212811369 U CN 212811369U
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power supply
module
power
microprocessor
display
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CN202021525849.8U
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彭涛
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Shanghai Yimeng Electric Automatism Technology Co ltd
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Shanghai Yimeng Electric Automatism Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

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Abstract

The utility model relates to a be applied to power down of frame circuit breaker and show holding circuit, which comprises a power supply, first step-down voltage stabilizing module, second step-down voltage stabilizing module, the stand-by power supply module, the power detection module, the power switching module, microprocessor and display power are connected with first step-down voltage stabilizing module and power detection module's input, the output of first step-down voltage stabilizing module is connected with second step-down voltage stabilizing module and microprocessor respectively, second step-down voltage stabilizing module is connected with the display, the power detection module is connected with the power, the power detection module is connected with microprocessor and power switching module respectively, the stand-by power supply module is connected with the power switching module, the power switching module is connected with microprocessor and display respectively, microprocessor is connected with the display. Compared with the prior art, when the power supply of the system is powered off, the standby power supply can be quickly switched to supply power to the microprocessor and the display, so that data loss is prevented, and the display is ensured to operate for a long time.

Description

Power-down display holding circuit applied to frame circuit breaker
Technical Field
The utility model relates to a fall the electricity and show holding circuit, especially relate to a be applied to frame circuit breaker fall electricity and show holding circuit.
Background
The frame circuit breaker is used as power grid protection equipment, under the condition of sudden power failure, a system cannot react in time to cause data loss, more and more systems require a power supply system to provide a power failure holding function, and the system can still maintain power supply for a period of time after receiving a power failure signal so as to react to power failure and avoid data loss, particularly fault data and running state recording. The existing frame circuit breaker solves the problem of power failure maintaining function of the frame circuit breaker through a scheme that a super capacitor is combined with power failure detection and an EEPROM (electrically erasable programmable read-only memory) or a scheme that an uninterrupted power supply system is combined with an external power supply 24V auxiliary power supply.
According to the scheme combining the super capacitor with the power failure detection and the EEPROM, after the system detects the power failure, the energy of the MCU is continuously provided by the energy storage capacitor, the MCU stores important information into the EEPROM, and the information storage during the power failure is guaranteed in the mode. The defect of the mode is that the capacitance and the electric quantity can only be used for storing important information, and for the frame short-circuiting device, the operation information of the system can still be checked through the display after the system is powered off, so that an electrician can be helped to quickly locate the fault type, and the maintenance time is saved. The super capacitor power supply mode cannot provide enough power down holding time.
The scheme that the uninterrupted power supply system is combined with an external 24V auxiliary power supply can keep the system to continue to normally display and supply power after power failure, and has the defects of high hardware cost and large volume occupation.
Therefore, the existing power-down data holding methods have certain defects, and if important information and data are held, screen display cannot be provided for a long time; if the power failure data can be kept stored and displayed for a long time, larger space and hardware investment are needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a be applied to frame circuit breaker's power down display holding circuit in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
a power-down display holding circuit applied to a frame circuit breaker comprises a power supply, a first voltage-reducing and voltage-stabilizing module, a second voltage-reducing and voltage-stabilizing module, a standby power supply module, a power supply detection module, a power supply switching module, a microprocessor and a display, wherein the microprocessor is provided with a signal interface, a power supply interface and a data output port, the display is provided with a data input port and a power supply interface,
the power supply is respectively connected with the input ends of the first voltage-reducing and voltage-stabilizing module and the power supply detection module, the output end of the first voltage-reducing and voltage-stabilizing module is respectively connected with the input end of the second voltage-reducing and voltage-stabilizing module and the power supply interface of the microprocessor, the output end of the second voltage-reducing and voltage-stabilizing module is connected with the power supply interface of the display,
the input end of the power supply detection module is connected with a power supply, the output end of the power supply detection module is respectively connected with a signal interface of the microprocessor and the power supply switching module, the output end of the standby power supply module is connected with the power supply switching module, the power supply switching module is respectively connected with a power supply interface of the microprocessor and a power supply interface of the display,
and a data output port of the microprocessor is connected with a data input port of the display.
Preferably, the power detection module includes a resistor and a zener diode, one end of the resistor is connected to the power supply, the other end of the resistor is respectively connected to the cathode of the zener diode, the power switching module and the signal interface of the microprocessor, and the anode of the zener diode is grounded.
Preferably, the power switching module includes a P-channel MOS transistor, a gate of the P-channel MOS transistor is connected to a negative electrode of the zener diode, a source of the P-channel MOS transistor is connected to the output terminal of the standby power module and the power interface of the microprocessor, and a drain of the P-channel MOS transistor is connected to the power interface of the display.
Preferably, the backup power module includes a backup battery and an anti-reverse-charging diode, a negative electrode of the backup battery is grounded, a positive electrode of the backup battery is connected with a negative electrode of the anti-reverse-charging diode, and a positive electrode of the anti-reverse-charging diode is connected with the power switching module.
Preferably, the first buck-boost module includes a first buck-boost chip, an input end of the first buck-boost chip is connected to the power supply, an output end of the first buck-boost chip is connected to an input end of the second buck-boost chip and a power interface of the microprocessor, respectively, and a ground end of the first buck-boost chip is grounded.
Preferably, the first buck and voltage regulation module further includes a capacitor, a negative electrode of the capacitor is connected to a ground terminal of the first buck and voltage regulation chip, and a positive electrode of the capacitor is connected to an output terminal of the first buck and voltage regulation chip.
Preferably, the second voltage-reducing and voltage-stabilizing module includes a second voltage-reducing and voltage-stabilizing chip, an input end of the second voltage-reducing and voltage-stabilizing chip is connected with an output end of the first voltage-reducing and voltage-stabilizing module, and an output end of the second voltage-reducing and voltage-stabilizing chip is connected with a power interface of the display.
Preferably, the first buck stabilizing chip is an LM1117-5V buck stabilizing module.
Preferably, the second buck and voltage regulation chip is an LM1117-3.3V buck and voltage regulation module.
Preferably, the microprocessor is R5F524 TBADFP.
When the utility model is used, if the power supply works normally, the voltage of the power supply is reduced by the first voltage reduction and stabilization module and then supplies power to the microprocessor, and then the voltage of the power supply is reduced by the second voltage reduction and stabilization module and then supplies power to the display, and the power supply detection module detects whether the power supply works normally or not in real time; when the power supply of the power supply drops, the power supply detection module detects that the power supply does not provide enough input voltage any more, the source electrode and the drain electrode of the power supply switching module are conducted, the standby power supply starts to work and supplies power to the microprocessor and the display, and the display keeping function after the power supply is powered off is realized.
Compared with the prior art, the utility model has the advantages of as follows:
(1) the utility model utilizes the cooperation of the standby power supply module, the power supply switching module and the power supply detection module, when the system power supply is powered off, the standby power supply can be rapidly switched to supply power to the microprocessor and the display, thereby preventing data loss and ensuring the long-time operation of the display;
(2) the standby power supply module, the power supply switching module and the power supply detection module are used for supplying power to the microprocessor and the display, so that the structure is simple, the cost is low, and the applicability is good;
(3) the first voltage reduction and stabilization module and the second voltage reduction and stabilization module are used for stabilizing and reducing the voltage of the power supply, so that the power supply stability during the stable operation of the power supply is improved;
(4) the standby power supply module is connected with the anti-recoil diode, so that the power supply is prevented from charging the standby battery when the power supply works normally, and the safety and the stability of the system are improved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a specific structure diagram of the present invention.
The power supply comprises a power supply 1, a power supply 2, a first voltage reduction and stabilization module 3, a second voltage reduction and stabilization module 4, a display 5, a microprocessor 6, a standby power supply module 7, a power supply detection module 8, a power supply switching module 9, a standby battery 10, an anti-reverse charging diode 11, a second voltage reduction and stabilization chip 12, a resistor 13, a first voltage reduction and stabilization chip 14, a capacitor 15, a voltage stabilization diode 16 and a P-channel MOS tube.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Note that the following description of the embodiments is merely an example of the nature, and the present invention is not intended to limit the application or the use thereof, and the present invention is not limited to the following embodiments.
Examples
The utility model provides a power down display holding circuit for frame circuit breaker, as shown in fig. 1, includes power 1, first step-down voltage regulator module 2, second step-down voltage regulator module 3, stand-by power supply module 6, power detection module 7, power switching module 8, microprocessor 5 and display 4, is equipped with signal interface, power source and data output port on microprocessor 5, is equipped with data input port and power source on display 4.
For the circuit connection of the power supply in normal working, the power supply 1 is respectively connected with the input ends of the first voltage reduction and stabilization module 2 and the power supply detection module 7, the output end of the first voltage reduction and stabilization module 2 is respectively connected with the input end of the second voltage reduction and stabilization module 3 and the power supply interface of the microprocessor 5, and the output end of the second voltage reduction and stabilization module 3 is connected with the power supply interface of the display 4.
The first voltage reduction and stabilization module 2 supplies power to the microprocessor 5, and the second voltage reduction and stabilization module 3 supplies power to the display 4.
Specifically, as shown in fig. 2, the first buck-regulator module 2 includes a first buck-regulator chip 13, an input end of the first buck-regulator chip 13 is connected to the power supply 1, an output end of the first buck-regulator chip 13 is connected to an input end of the second buck-regulator chip 11 and a power interface of the microprocessor 5, respectively, and a ground end of the first buck-regulator chip 13 is grounded. The first buck-regulator module 2 further includes a capacitor 14, a negative electrode of the capacitor 14 is connected to the ground terminal of the first buck-regulator chip 13, and a positive electrode of the capacitor 14 is connected to the output terminal of the first buck-regulator chip 13.
The second voltage-reducing and voltage-stabilizing module 3 comprises a second voltage-reducing and voltage-stabilizing chip 11, the input end of the second voltage-reducing and voltage-stabilizing chip 11 is connected with the output end of the first voltage-reducing and voltage-stabilizing module 2, and the output end of the second voltage-reducing and voltage-stabilizing chip 11 is connected with a power interface of the display 4.
In this embodiment, the first voltage-reducing and voltage-stabilizing chip 13 is an LM1117-5V voltage-reducing and voltage-stabilizing module, the second voltage-reducing and voltage-stabilizing chip 11 is an LM1117-3.3V voltage-reducing and voltage-stabilizing module, the microprocessor 5 is an R5F524TBADFP, and the microprocessor 5 is a 3.3-5V wide-range power supply processor.
In order to realize the power-down display holding function, the input end of the power supply detection module 7 is connected with the power supply 1, the output end of the power supply detection module 7 is respectively connected with the signal interface of the microprocessor 5 and the power supply switching module 8, the output end of the standby power supply module 6 is connected with the power supply switching module 8, the power supply switching module 8 is respectively connected with the power supply interface of the microprocessor 5 and the power supply interface of the display 4, and the data output port of the microprocessor 5 is connected with the data input port of the display 4.
When the power supply 1 is powered off, the power supply detection module 7 detects that the power supply 1 is powered off, the power supply switching module 8 switches the power supply into the standby power supply module 6, and the standby power supply module 6 supplies power to the microprocessor 5 and the display 4.
Specifically, the power detection module 7 includes a resistor 12 and a zener diode 15, one end of the resistor 12 is connected to the power supply 1, the other end is connected to the cathode of the zener diode 15, the power switching module 8 and the signal interface of the microprocessor 5, respectively, and the anode of the zener diode 15 is grounded.
The power supply switching module 8 comprises a P-channel MOS tube 16, the grid electrode of the P-channel MOS tube 16 is connected with the negative electrode of the voltage stabilizing diode 15, the source electrode of the P-channel MOS tube 16 is connected with the output end of the standby power supply module 6 and the power supply interface of the microprocessor 5, and the drain electrode of the P-channel MOS tube 16 is connected with the power supply interface of the display 4.
The standby power supply module 6 comprises a standby battery 9 and an anti-reverse charging diode 10, wherein the cathode of the standby battery 9 is grounded, the anode of the standby battery 9 is connected with the cathode of the anti-reverse charging diode 10, and the anode of the anti-reverse charging diode 10 is connected with the power supply switching module 8.
In this embodiment, the voltage of the backup battery 9 is 3.6V, and the anti-reverse charging diode 10 is a schottky diode with a conduction voltage drop of 0.3V.
The working principle of the utility model is as follows:
in this embodiment, the voltage of the power supply 1 is 24V, 24V is reduced to 5V through the first voltage reduction and stabilization chip 13 when the power supply 1 is normally powered, and supplies power to the microprocessor 5, 5V is reduced to 3.3V through the second voltage reduction and stabilization chip 11 and supplies power to the display 4, the VCC power supply voltage is stabilized to 5V by the resistor 12 and the zener diode 15, the signal interface of the microprocessor 5 is accessed, and meanwhile, the gate of the P-channel MOS transistor 16 is accessed, the signal interface of the microprocessor 5 is at a high level at this time, and the P-channel MOS transistor 16 is in a cut-off state.
When the power supply drops, the power supply 1 provides enough input voltage, the signal interface of the microprocessor 5 is at a low level, the source electrode and the drain electrode of the P-channel MOS tube 16 are conducted, the standby battery 9 supplies power to the microprocessor 5 and the display 4 after being reduced by the anti-reverse charging diode 10, and the whole system operates normally.
The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments may be implemented in other various manners, and various omissions, substitutions, and changes may be made without departing from the technical spirit of the present invention.

Claims (10)

1. A power failure display holding circuit applied to a frame circuit breaker is characterized by comprising a power supply (1), a first voltage reduction and stabilization module (2), a second voltage reduction and stabilization module (3), a standby power supply module (6), a power supply detection module (7), a power supply switching module (8), a microprocessor (5) and a display (4), wherein the microprocessor (5) is provided with a signal interface, a power supply interface and a data output port, the display (4) is provided with a data input port and a power supply interface,
the power supply (1) is respectively connected with the input ends of the first voltage reduction and stabilization module (2) and the power supply detection module (7), the output end of the first voltage reduction and stabilization module (2) is respectively connected with the input end of the second voltage reduction and stabilization module (3) and the power supply interface of the microprocessor (5), the output end of the second voltage reduction and stabilization module (3) is connected with the power supply interface of the display (4),
the input end of the power supply detection module (7) is connected with the power supply (1), the output end of the power supply detection module (7) is respectively connected with the signal interface of the microprocessor (5) and the power supply switching module (8), the output end of the standby power supply module (6) is connected with the power supply switching module (8), the power supply switching module (8) is respectively connected with the power supply interface of the microprocessor (5) and the power supply interface of the display (4),
and a data output port of the microprocessor (5) is connected with a data input port of the display (4).
2. The power-down display maintaining circuit applied to the frame circuit breaker according to claim 1, wherein the power supply detection module (7) comprises a resistor (12) and a zener diode (15), one end of the resistor (12) is connected to the power supply (1), the other end of the resistor is respectively connected to the cathode of the zener diode (15), the power supply switching module (8) and the signal interface of the microprocessor (5), and the anode of the zener diode (15) is grounded.
3. The power-down display holding circuit applied to the frame circuit breaker according to claim 2, wherein the power switching module (8) comprises a P-channel MOS transistor (16), a gate of the P-channel MOS transistor (16) is connected to a cathode of the zener diode (15), a source of the P-channel MOS transistor (16) is connected to the output end of the standby power module (6) and the power interface of the microprocessor (5), and a drain of the P-channel MOS transistor (16) is connected to the power interface of the display (4).
4. The power failure display holding circuit applied to the frame circuit breaker according to claim 1, wherein the backup power module (6) comprises a backup battery (9) and an anti-reverse charging diode (10), the negative pole of the backup battery (9) is grounded, the positive pole of the backup battery (9) is connected with the negative pole of the anti-reverse charging diode (10), and the positive pole of the anti-reverse charging diode (10) is connected with the power supply switching module (8).
5. The power-down display holding circuit applied to the frame circuit breaker according to claim 1, wherein the first buck-regulator module (2) comprises a first buck-regulator chip (13), an input end of the first buck-regulator chip (13) is connected with the power supply (1), an output end of the first buck-regulator chip (13) is respectively connected with an input end of the second buck-regulator chip (11) and a power interface of the microprocessor (5), and a ground end of the first buck-regulator chip (13) is grounded.
6. The power-down display maintaining circuit applied to the frame circuit breaker according to claim 5, wherein the first buck regulator module (2) further comprises a capacitor (14), the negative pole of the capacitor (14) is connected to the ground terminal of the first buck regulator chip (13), and the positive pole of the capacitor (14) is connected to the output terminal of the first buck regulator chip (13).
7. The power-down display maintaining circuit applied to the frame circuit breaker according to claim 1, wherein the second buck regulator module (3) comprises a second buck regulator chip (11), an input end of the second buck regulator chip (11) is connected with an output end of the first buck regulator module (2), and an output end of the second buck regulator chip (11) is connected with a power interface of the display (4).
8. The power-down display maintaining circuit applied to the frame circuit breaker according to claim 5, wherein the first buck regulator chip (13) is an LM1117-5V buck regulator module.
9. The power-down display maintaining circuit applied to the frame circuit breaker according to claim 7, wherein the second buck regulator chip (11) is an LM1117-3.3V buck regulator module.
10. The power-down display holding circuit applied to a frame circuit breaker according to claim 1, wherein the microprocessor (5) is R5F524 TBADFP.
CN202021525849.8U 2020-07-29 2020-07-29 Power-down display holding circuit applied to frame circuit breaker Active CN212811369U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021525849.8U CN212811369U (en) 2020-07-29 2020-07-29 Power-down display holding circuit applied to frame circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021525849.8U CN212811369U (en) 2020-07-29 2020-07-29 Power-down display holding circuit applied to frame circuit breaker

Publications (1)

Publication Number Publication Date
CN212811369U true CN212811369U (en) 2021-03-26

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Application Number Title Priority Date Filing Date
CN202021525849.8U Active CN212811369U (en) 2020-07-29 2020-07-29 Power-down display holding circuit applied to frame circuit breaker

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CN (1) CN212811369U (en)

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