CN114442723A - Cascade signal differential pressure correction, self-control standby power supply and protection circuit - Google Patents

Cascade signal differential pressure correction, self-control standby power supply and protection circuit Download PDF

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Publication number
CN114442723A
CN114442723A CN202210135380.4A CN202210135380A CN114442723A CN 114442723 A CN114442723 A CN 114442723A CN 202210135380 A CN202210135380 A CN 202210135380A CN 114442723 A CN114442723 A CN 114442723A
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power supply
slave
circuit
standby power
resistor
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CN114442723B (en
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杨文鑫
刘旭东
董飞青
李亚峰
梁鸿宇
张斌
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Yunmai Shanghai Internet Of Things Technology Co ltd
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Yunmai Shanghai Internet Of Things Technology Co ltd
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/625—Regulating voltage or current wherein it is irrelevant whether the variable actually regulated is ac or dc
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

The invention discloses a circuit for correcting cascade signal pressure difference, automatically controlling a standby power supply and protecting, which comprises a host, a connecting wire and slave machines, wherein the host is connected with an 'IN' input interface of a first slave machine through the connecting wire, an 'OUT' output interface of each slave machine is connected with an 'IN' input interface of a next slave machine, and a plurality of slave machine devices are sequentially cascaded; the slave machine comprises a self-control standby power supply circuit and a unidirectional power supply and current limiting device circuit. Compared with the prior art, the invention has the advantages that: the invention can realize the purpose of solving the problem of analog signal transmission pressure difference between two adjacent devices caused by power supply voltage error through a self-control standby power supply on-off mode, and improves the cascade precision of analog signals.

Description

Cascade signal differential pressure correction, self-control standby power supply and protection circuit
Technical Field
The invention relates to a cascade circuit, in particular to a circuit for correcting cascade signal differential pressure, automatically controlling a standby power supply and protecting.
Background
The analog signal cascade technology can realize that one host computer controls a plurality of slave computers, and the upper level slave computer or the host computer provides standby power supply for the lower level slave computer, thereby well solving the problem that the signals can not be continuously transmitted due to the power failure of the slave computers. The current-limiting protection solves the problem that when a power supply of a certain slave machine is short-circuited, the slave machine or the host machine at the upper level can automatically cut off the standby power supply, and the fault removal can automatically open.
In the existing analog signal cascade transmission, under the condition that the upper level and the lower level provide standby power supply mutually, the analog signal has larger voltage difference due to different power supply voltages of adjacent slave machines, and the signal voltage precision is influenced. In this case, if a power supply or a connection line of a slave computer is short-circuited, the fault of the whole chain cascade equipment is affected, and potential safety hazards exist.
Therefore, developing a circuit for cascade signal voltage difference correction, self-control standby power supply and protection becomes a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to solve the defects, provides a circuit for correcting the differential pressure of a cascade signal, automatically controlling a standby power supply and protecting the standby power supply, and aims to solve the problem that the output protection of the standby power supply of a slave or a host is caused by larger differential pressure due to different power supply voltages of adjacent slaves in the cascade transmission of analog signals under the condition that the upper level and the lower level mutually provide standby power supply in the existing equipment.
The above object of the present invention is achieved by the following technical means: a cascade signal differential pressure correction, self-control standby power supply and protection circuit comprises a host, a connecting line and slave units, wherein the host is connected with an 'IN' input interface of a first slave unit through the connecting line, an 'OUT' output interface of each slave unit is connected with an 'IN' input interface of a next slave unit, and a plurality of slave units are sequentially cascaded.
Further, the slave machine comprises a self-control standby power supply circuit and a unidirectional power supply and current limiting device circuit.
Furthermore, the self-control standby power supply circuit comprises resistors R1, R2, R3, R4, R5, R6, R7 and R8, a field effect transistor Q1, triodes Q2 and Q3 and a diode D3, wherein the switch is controlled by the slave power supply, the standby power supply can be started only when the slave power supply fails, and the standby power supply is provided by the slave or the host of the previous stage. The standby power supply is in a closed state in a normal state, because the driving current of the analog signal is extremely small, the common ground wire between the adjacent slave machines has almost no current, the two ends of the common ground wire have no relative voltage difference, and the voltage of the output end and the voltage of the receiving end of the analog signal are almost consistent.
The principle of the method for reducing the signal cascade voltage error is that when the power supply voltages of adjacent slave machines are different, the voltage of the slave machine of the previous stage is higher than the power supply voltage of the slave machine of the next stage, the slave machine of the previous stage is supplied with power due to the higher voltage of the slave machine of the previous stage, larger current flows between the two slave machines, larger voltage difference occurs at two ends of a common ground, and if the two ends of the common ground are V, the two ends of the common ground are V△The voltage of the output signal of the upper-stage slave machine is V, the ground terminal of the upper-stage slave machine is zero potential, and the potential of the bottom terminal of the lower-stage slave machine is V△The voltage when the signal is transmitted to the next level slave is V-V△. When the voltage of the upper-stage slave machine is lower than the power supply voltage of the lower-stage slave machine, the potential of the bottom line end of the lower-stage slave machine is-V△The voltage when the signal is transmitted to the next level slave machine is V + V△. Therefore, the slave machines in the upper and lower stages directly provide the standby power supply scheme, and the signal cascade voltage error is increased. The problem can be well solved in a self-control standby power supply circuit and a one-way power supply and current limiting device circuit. Because the standby power supply is in a closed state in a normal state, the one-way power supply is cut off from the next-stage slave machine to supply power to the previous-stage slave machine, and then V is used△The voltage of the signal transmitted from the upper-level slave machine to the lower-level slave machine is still the output voltage V of the upper-level slave machine, thereby solving the problem.
In the self-control standby power supply circuit, a field effect tube Q1 plays a role of a switch, a source electrode of the field effect tube Q1 is connected with resistors R1 and R2 and an input power supply VIN, a drain electrode is connected with a working power supply VA of a slave communication functional circuit, and a grid electrode is connected with resistors R2 and R3. The triodes Q2 and Q3 are NPN type triodes, and the field effect transistor Q1 is of a P channel type; the collector of the triode Q2 is connected with a current-limiting resistor R3, the emitter is connected with a resistor R6, a voltage division circuit is formed by the resistors R1 and R5, and the divided middle voltage is connected with the base of the triode Q2; the collector of the triode Q3 is connected with the base of the triode Q2 to control the on-off of the triode Q2, the resistor R4 is a current-limiting resistor, the base of the triode Q3 is connected with the resistor R4, the emitter is connected with the resistor R7, the resistor R8 is a pull-down resistor, and the resistor R4 and GND are connected; the resistor R2 is a pull-up resistor and is connected with a power supply and the grid electrode of the field effect transistor Q1; the diode D3 plays a reverse conducting role and supplies power for external standby power to the slave 'IN' input interface. When the control voltage VDC is at a high potential, the transistor Q3 is turned on, the base level of the transistor Q2 is pulled down, the transistor Q2 is in an off state, the gate and source potentials of the field effect transistor Q1 are equal, the field effect transistor Q1 is in an off state, and at this time, the standby power supply is not started. When the control voltage VDC is at a low potential, the transistor Q3 is in an off state, the base level of the transistor Q2 is at a high level, the transistor Q2 is turned on, the gate and the source of the fet Q1 present a potential difference, the fet Q1 is in an on state, and at this time, the standby power supply is turned on.
Further, the unidirectional power supply and current limiting device circuit comprises diodes D1, D2 and a restorable fuse F1, wherein the diode D1 plays a single-phase conduction role and prevents reverse power supply, the anode of the diode D1 is connected with a working power supply 'VA' of the slave communication function circuit, the cathode of the diode D1 is connected with the restorable fuse F1, and the restorable fuse F1 is connected with an output power supply 'VOUT'; the anode of the diode D2 is connected with a slave power supply V + ", and the cathode is connected with a slave communication functional circuit working power supply VA"; only the previous slave between the adjacent slaves has the opportunity to supply power to the next slave, and the next slave cannot provide a standby power supply for the previous slave due to the single conduction function of the diode D1, so that the restorable fuse F1 plays a role in current limiting protection; diode D2 prevents backup power from being supplied back to the slave; the diodes D1 and D2 play a single-phase conducting role, and the recoverable fuse F1 plays a current limiting protection role.
When the power-off system works, the slave computer is powered on and turns off the standby power supply from the upper-level slave computer or the host computer to the slave computer by default; if the power supply of the slave machine fails, the standby power supply can be automatically turned on and is supplied with power by the slave machine or the host machine at the upper stage; if the current is too large due to short circuit of the slave machine or the line, the recoverable fuse F1 of the slave machine or the host machine at the upper stage can be automatically disconnected, and the protection is not influenced. The next-level slave does not provide standby power supply for the previous-level slave or the host.
The circuit of the invention is designed with a standby power supply automatic control switch added to each level of slave, the standby power supply is started only when the slave fails to work under the control of the power supply signal of the slave, the standby power supply is provided by the slave or the host of the previous level, and the standby power supply is closed under the normal state. A recoverable fuse is added to the standby power supply output end of the slave or the host of each stage to prevent overlarge current from affecting the normal work of the host or the slave.
Compared with the prior art, the invention has the advantages that: the invention can realize the automatic control of the on-off mode of the standby power supply, solve the problem of the transmission pressure difference of the analog signals between two adjacent devices caused by the power supply voltage error and improve the cascade precision of the analog signals.
Drawings
FIG. 1 is a wiring diagram of the present invention.
Fig. 2 is a functional block diagram of the present invention.
Fig. 3 is a circuit schematic of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a circuit for cascade signal differential pressure correction, self-control standby power supply and protection is applied to a cascade signal system, and the cascade signal differential pressure correction scheme can solve the problem of signal differential pressure when a host computer and a slave computer are transmitted and between the slave computer and the slave computer, improve the signal cascade precision, and provide the self-control standby power supply and protection.
The circuit for cascade signal differential pressure correction, automatic control standby power supply and protection comprises a host, a connecting line and slave units, wherein the host is connected with an 'IN' input interface of a first slave unit through the connecting line, an 'OUT' output interface of each slave unit is connected with an 'IN' input interface of a next slave unit, and a plurality of slave units are sequentially cascaded. The wiring part comprises an input end 'IN' and an output end 'OUT', the master computer is connected with an input interface of a first slave computer 'IN' through a connecting wire, and an output interface of each slave computer 'OUT' is sequentially connected with an input interface of a next slave computer 'IN' IN a cascade mode, as shown IN figure 1.
As shown in fig. 2, the slave power supply supplies power to the slave only, the slave standby power supply does not supply power to the slave in reverse direction, the power supply signal in the slave circuit controls the standby power switch, the slave communication function circuit power supply supplies standby power to the next-level slave in one direction through current-limiting protection, and the next-level slave does not supply standby power to the previous-level slave due to the unidirectional power supply.
Further, the slave machine comprises a self-control standby power supply circuit, a communication function circuit and a one-way power supply and current limiting device circuit.
Further, the self-control standby power supply circuit comprises resistors R1, R2, R3, R4, R5, R6, R7 and R8, a field-effect tube Q1, triodes Q2 and Q3 and a diode D3. The invention uses the slave power supply to control the switch, only when the slave power supply fails, the standby power supply can be started, and the upper level slave or the host provides standby power supply. The standby power supply is in a closed state in a normal state, because the driving current of the analog signal is extremely small, the common ground wire between the adjacent slave machines has almost no current, the two ends of the common ground wire have no relative voltage difference, and the voltage of the output end and the voltage of the receiving end of the analog signal are almost consistent.
In the self-control standby power supply circuit, a field effect tube Q1 plays a role of a switch, a source electrode of the field effect tube Q1 is connected with resistors R1 and R2 and an input power supply VIN, a drain electrode is connected with a working power supply VA of a slave communication functional circuit, and a grid electrode is connected with resistors R2 and R3. The triodes Q2 and Q3 are NPN type triodes, and the field effect transistor Q1 is of a P channel type; the collector of the triode Q2 is connected with a current-limiting resistor R3, the emitter is connected with a resistor R6, a voltage division circuit is formed by the resistors R1 and R5, and the divided middle voltage is connected with the base of the triode Q2; the collector of the triode Q3 is connected with the base of the triode Q2 to control the on-off of the triode Q2, the resistor R4 is a current-limiting resistor, the base of the triode Q3 is connected with the resistor R4, the emitter is connected with the resistor R7, the resistor R8 is a pull-down resistor, and the resistor R4 and GND are connected; the resistor R2 is a pull-up resistor and is connected with a power supply and the grid electrode of the field effect transistor Q1; the diode D3 plays a reverse conducting role and supplies power for external standby power to the slave 'IN' input interface. When the control voltage VDC is at a high potential, the transistor Q3 is turned on, the base level of the transistor Q2 is pulled down, the transistor Q2 is in an off state, the gate and source potentials of the field effect transistor Q1 are equal, the field effect transistor Q1 is in an off state, and at this time, the standby power supply is not started. When the control voltage VDC is at a low potential, the transistor Q3 is in an off state, the base level of the transistor Q2 is at a high level, the transistor Q2 is turned on, the gate and the source of the fet Q1 present a potential difference, the fet Q1 is in an on state, and at this time, the standby power supply is turned on.
The unidirectional power supply and current limiting device circuit comprises diodes D1, D2 and a restorable fuse F1, wherein the diode D1 plays a single-phase conduction role to prevent reverse power supply, the anode of the diode D1 is connected with a working power supply 'VA' of a slave communication function circuit, the cathode of the diode D1 is connected with the restorable fuse F1, and the restorable fuse F1 is connected with an output power supply 'VOUT'; the anode of the diode D2 is connected with a slave power supply V + ", and the cathode is connected with a slave communication functional circuit working power supply VA"; only the previous slave between the adjacent slaves has the opportunity to supply power to the next slave, and the next slave cannot provide a standby power supply for the previous slave due to the single conduction function of the diode D1, so that the restorable fuse F1 plays a role in current limiting protection; diode D2 prevents backup power from being supplied back to the slave; the diodes D1 and D2 play a single-phase conducting role, and the recoverable fuse F1 plays a current limiting protection role.
As shown in fig. 3, it is a schematic diagram of a slave self-control standby power circuit and a one-way power supply and current limiting device circuit, the control voltage VDC is connected with a current limiting resistor R4 to control the base of a transistor Q3, the collector of a transistor Q3 is connected with the base of a transistor Q2, and the collector of a transistor Q2 is connected with the gate of a field effect transistor Q1. Under the normal state, the control voltage VDC is at a high potential, the triode Q3 is conducted, the base level of the triode Q2 is pulled down, the triode Q2 is in a closed state, the grid potential and the source potential of the field effect transistor Q1 are equal, the field effect transistor Q1 is in a closed state, the standby power supply is not started at the moment, the next-stage slave machine is cut off for supplying power to the previous-stage slave machine in a unidirectional power supply mode, the voltage difference between two ends of the common ground wire of the adjacent slave machine is almost 0, and the output signal of the previous-stage slave machine is also consistent with the voltage of the signal received by the next-stage slave machine. When the slave machine has power supply failure, the control voltage VDC is at a low potential, the triode Q3 is in a closed state, the base level of the triode Q2 is at a high level, the triode Q2 is conducted, the grid and the source of the field effect transistor Q1 present a potential difference, the field effect transistor Q1 is in a conducting state, at the moment, the standby power supply is started, the master machine or the slave machine provides power for the next-stage slave machine, and the whole functional system is ensured to be in a normal working state.
IN the embodiment of the invention, the host is connected with the first slave machine through the connecting wire, and each slave machine is sequentially connected and cascaded with the IN input end interface of the next slave machine through the OUT output end interface. The normal standby power supply of the slave power supply is in a closed state, and the standby power supply is started when the fault occurs.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (4)

1. A cascade signal differential pressure correction, self-control standby power supply and protection circuit is characterized by comprising a host, connecting wires and slave machines, wherein the host is connected with an 'IN' input interface of a first slave machine through the connecting wires, an 'OUT' output interface of each slave machine is connected with an 'IN' input interface of a next slave machine, and a plurality of slave machine devices are sequentially cascaded; the slave machine comprises a self-control standby power circuit and a unidirectional power supply and current limiting device circuit; the automatic control standby power supply circuit is used for controlling the on-off of a standby power supply from a superior slave or a host; the unidirectional power supply and current limiting device circuit is used for single-phase conduction and preventing reverse power supply; the current limiting device plays a role in limiting current and prevents overlarge current caused by accidental short circuit or fault.
2. A self-controlled standby power supply circuit as claimed in claim 1, wherein: the self-control standby power supply circuit comprises resistors R1, R2, R3, R4, R5, R6, R7 and R8, a field-effect tube Q1, triodes Q2 and Q3 and a diode D3.
3. A self-controlled standby power supply circuit as claimed in claim 2, wherein: in the self-control standby power supply circuit, a field effect tube Q1 plays a role of a switch, a source electrode of the field effect tube Q1 is connected with resistors R1 and R2 and an input power supply VIN, a drain electrode is connected with a working power supply VA of a slave communication functional circuit, and a grid electrode is connected with resistors R2 and R3; the triodes Q2 and Q3 are NPN type triodes, and the field effect transistor Q1 is of a P channel type; the collector of the triode Q2 is connected with a current-limiting resistor R3, the emitter is connected with a resistor R6, a voltage division circuit is formed by the resistors R1 and R5, and the divided middle voltage is connected with the base of the triode Q2; the collector of the triode Q3 is connected with the base of the triode Q2 to control the on-off of the triode Q2, the resistor R4 is a current-limiting resistor, the base of the triode Q3 is connected with the resistor R4, the emitter is connected with the resistor R7, and the resistor R8 is a pull-down resistor connected with the resistor R4 and GND; the resistor R2 is a pull-up resistor and is connected with a power supply and the grid electrode of the field effect transistor Q1; the diode D3 plays a reverse conducting role and supplies power for external standby power to the slave 'IN' input interface.
4. The self-control standby power supply circuit as claimed in claim 1, wherein the unidirectional power supply and current limiting device circuit comprises diodes D1, D2 and a recoverable fuse F1, the diode D1 has a single-phase conduction function to prevent reverse power supply, the diode D1 has a positive electrode connected to a working power supply "VA" of the slave communication function circuit and a negative electrode connected to a recoverable fuse F1, and the recoverable fuse F1 is connected to an output power supply "VOUT"; the anode of the diode D2 is connected with a slave power supply V + ", and the cathode is connected with a slave communication functional circuit working power supply VA"; only the previous slave between the adjacent slaves has the opportunity to supply power to the next slave, and the next slave cannot provide a standby power supply for the previous slave due to the single conduction function of the diode D1, so that the restorable fuse F1 plays a role in current limiting protection; diode D2 prevents backup power from being supplied back to the slave; the diodes D1 and D2 play a single-phase conducting role, and the recoverable fuse F1 plays a current limiting protection role.
CN202210135380.4A 2022-02-14 2022-02-14 Circuit for correcting and automatically controlling standby power supply and protecting cascade signal voltage difference Active CN114442723B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140156253A1 (en) * 2012-12-04 2014-06-05 International Business Machines Corporation Functional built-in self test for a chip
CN106292343A (en) * 2015-05-19 2017-01-04 鸿富锦精密工业（深圳）有限公司 Power supply system of electronic device
WO2018076794A1 (en) * 2016-10-25 2018-05-03 宁德时代新能源科技股份有限公司 Redundant backup control circuit of battery management system
CN108803431A (en) * 2018-07-09 2018-11-13 江苏恒宝智能系统技术有限公司 A kind of more equipment power supply management devices, connection method and system
CN109391277A (en) * 2018-12-10 2019-02-26 大山科技有限公司 A kind of cascade bus signal receiving circuit and control system
CN209526556U (en) * 2019-04-04 2019-10-22 江苏沁恒股份有限公司 Power supply switch circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140156253A1 (en) * 2012-12-04 2014-06-05 International Business Machines Corporation Functional built-in self test for a chip
CN106292343A (en) * 2015-05-19 2017-01-04 鸿富锦精密工业（深圳）有限公司 Power supply system of electronic device
WO2018076794A1 (en) * 2016-10-25 2018-05-03 宁德时代新能源科技股份有限公司 Redundant backup control circuit of battery management system
CN108803431A (en) * 2018-07-09 2018-11-13 江苏恒宝智能系统技术有限公司 A kind of more equipment power supply management devices, connection method and system
CN109391277A (en) * 2018-12-10 2019-02-26 大山科技有限公司 A kind of cascade bus signal receiving circuit and control system
CN209526556U (en) * 2019-04-04 2019-10-22 江苏沁恒股份有限公司 Power supply switch circuit

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