CN210608685U - UPS power supply switching control system - Google Patents
UPS power supply switching control system Download PDFInfo
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- CN210608685U CN210608685U CN201922121942.6U CN201922121942U CN210608685U CN 210608685 U CN210608685 U CN 210608685U CN 201922121942 U CN201922121942 U CN 201922121942U CN 210608685 U CN210608685 U CN 210608685U
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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
- Y02B70/30—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
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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
- 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
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Abstract
The utility model provides a UPS power supply switching control system, including rectifier circuit REC, dc-to-ac converter, stand-by battery, direct current booster, excessive pressure undervoltage detection circuitry, outage detection circuitry, switching control circuit and controller; the switching control circuit comprises a first switch and a second switch; the input end of the rectification circuit is connected with a mains supply through a second change-over switch, the output end of the rectification circuit is connected with the input end of the inverter through a diode, the output end of the standby battery is connected with the input end of the direct current booster through a first change-over switch, the output end of the direct current booster is connected with the input end of the inverter, and the output end of the inverter INV supplies power to a load; the bypass power supply can be quickly switched to when the power supply of the main loop is unstable or the power is cut off, and zero-crossing detection is not needed in the switching process, so that the switching time lag is effectively reduced, and the power supply stability of the electric power machine room is ensured.
Description
Technical Field
The utility model relates to a power control system especially relates to a UPS power supply switching control system.
Background
In an electric power system, an electric power machine room is an extremely important place of the electric power system, various control devices, communication devices and other electric equipment are arranged in the electric power system and used for providing guarantee for electric power switching and communication control, and the electric equipment can not be powered off in the working process generally, otherwise, the dispatching control of the electric power system is influenced, so that the stable operation of the electric power system is influenced.
In the prior art, the power supply in the electric power machine room is generally supplied by a UPS power supply, i.e. the commercial power is supplied for standby through a main loop formed by rectification and inversion and a bypass formed by a storage battery and a direct current booster, when the commercial power is unstable or is cut off, the storage battery is used for temporary power supply, when the main loop and the bypass are switched, two thyristors are generally adopted to form a bidirectional thyristor, and a static switch is further formed for switching, in the switching control, the thyristor can be conducted under the condition of triggering control due to the triggering characteristic of the thyristor, at the moment, the zero point of the voltage needs to be detected, then trigger, moreover, need still detect the excessive pressure of voltage, under-voltage state to, therefore cause whole circuit system too complicated, and because zero point detects and leads to the time lag serious, thereby influence the power supply of whole electric power computer lab.
Therefore, in order to solve the above technical problems, it is necessary to provide a new technical means for solving the problems.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a UPS power supply switches control system can be when the main loop power supply is unstable or when cutting off the power supply fast switch to the bypass power supply, need not to carry out zero cross detection in the switching process moreover to effectively reduce and switch the time lag, ensure electric power computer lab power supply stability, moreover, can the automatic switch to the main loop power supply when the main loop resumes normally, thereby facilitate the use.
The utility model provides a UPS power supply switching control system, including rectifier circuit REC, inverter INV, reserve battery BAT, direct current booster DC-DC, excessive pressure undervoltage detection circuitry, outage detection circuitry, switching control circuit and controller PLC;
the switching control circuit comprises a first switch and a second switch;
the input end of the rectification circuit REC is connected with a mains supply through a second change-over switch, the output end of the rectification circuit REC is connected with the input end of the inverter INV through a diode D1, the output end of the standby battery BAT is connected with the input end of the direct current booster DC-DC through a first change-over switch, the output end of the direct current booster DC-DC is connected with the input end of the inverter INV, and the output end of the inverter INV supplies power to a load;
the input of excessive pressure undervoltage detection circuit is connected in rectifier circuit REC's output, and excessive pressure undervoltage detection circuit's first output with respectively with first change over switch's first control input, second change over switch's first control input and controller PLC's control input Cri1 connection, second change over switch's second control input and controller PLC's control output Cro1 are connected, and first change over switch's second control input is connected with controller PLC's control output Cro2, outage detection circuit's input is connected with excessive pressure undervoltage detection circuit's second output, and outage detection circuit's output is connected with controller PLC's control input Cri 2.
Further, the overvoltage and undervoltage detection circuit comprises a resistor R1, a resistor R2, a resistor R3, an operational amplifier U1, a comparator U2, a comparator U3, a resistor R6, an adjustable resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a triode Q2 and a triode Q3;
one end of a resistor R1 is connected with the output end of the rectifier circuit REC, the other end of the resistor R1 is grounded through a resistor R2, a common connection point between a resistor R2 and a resistor R1 serves as a second output end of the overvoltage and undervoltage detection circuit, the in-phase end of an operational amplifier U1 is connected with the common connection point between the resistor R2 and the resistor R1 through a resistor R3, the inverting end of the operational amplifier U1 is directly connected with the output end of the operational amplifier U1 to form a voltage follower, the output end of the operational amplifier U1 is connected with the in-phase end of a comparator U2 and the inverting end of a comparator U3, one end of the resistor R6 is connected with a power supply VCC, the other end of the resistor R6 is connected with one end of the resistor R8 through an adjustable resistor R7, the other end of the resistor R8 is grounded, the common connection point between the resistor R6 and the adjustable resistor R7 is connected with the inverting end of the comparator U2, the adjustable common connection point between the resistor R8 and the resistor R, the output end of the comparator U2 is connected with the base of a triode Q2 through a resistor R9, the output end of the comparator U3 is connected with the base of a triode Q2 through a resistor R10, the emitter of a triode Q2 is grounded, the collector of the triode Q2 is connected with the base of the triode Q3, the base of the triode Q3 is connected with a power VCC through a resistor R11, the emitter of the triode Q3 is connected with the power VCC through a resistor R12, the collector of the triode Q3 is grounded through a resistor R13, the collector of the triode Q3 serves as the first output end of the overvoltage and undervoltage detection circuit, and the triode Q3 is a P-type triode.
Further, the first switch comprises a thyristor Q1, a resistor R14, a diode D3 and a MOS transistor Q6;
the positive pole of silicon controlled rectifier Q1 is connected with the output of reserve battery BAT, the negative pole of silicon controlled rectifier Q1 is connected with direct current boost circuit DC-DC's input, silicon controlled rectifier Q1 is connected with the one end of resistance R14, the other end of resistance R14 is as the first control input of first change over switch, the positive pole of diode D3 is as the second control input of first change over switch, the negative pole of diode D3 is connected with the grid of MOS pipe Q6, the source ground connection of MOS pipe Q6, the drain-source resistance of MOS pipe Q6 is connected with the positive pole of silicon controlled rectifier Q1.
Further, the second change-over switch comprises a relay, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a light emitting diode LED, a diode D2, a triode Q5 and a silicon controlled rectifier Q4;
the control electrode of a controlled silicon Q4 is connected with one end of a resistor R15, the other end of a resistor R15 is used as a first control input end of a second change-over switch, the anode of a controlled silicon Q4 is connected with a power VCC through a resistor R16, the cathode of a controlled silicon Q6 is connected with one end of a resistor R17 through a coil J1 of a relay, the other end of a resistor R17 is grounded, the anode of a light-emitting diode LED is connected with the cathode of a controlled silicon Q4, the cathode of the light-emitting diode LED is grounded through a resistor R18, the collector of a triode Q5 is connected with the anode of a controlled silicon Q4, the emitter of a triode Q5 is grounded, the base of a triode Q5 is connected with the cathode of a diode D2, the anode of a diode D2 is used as a second control input end of the second change-over switch, and a normally-.
Further, the power failure detection circuit comprises a resistor R4, a resistor R5 and an optical coupler OC 1;
the one end of resistance R4 is as outage detection circuitry's input, the other end of resistance R4 is connected with opto-coupler OC 1's emitting diode's positive pole, opto-coupler OC 1's emitting electrode ground connection, opto-coupler OC 1's phototriode's emitter ground connection, opto-coupler OC 1's phototriode's collecting electrode passes through resistance R5 and is connected with the power VCC, opto-coupler OC 1's phototriode's collecting electrode is as outage detection circuitry's output.
The utility model has the advantages that: through the utility model discloses, can be when the main loop power supply is unstable or when cutting off the power supply fast switch to the bypass power supply, the switching in-process need not to carry out zero cross detection moreover to effectively reduce and switch the time lag, ensure electric power computer lab power supply stability, moreover, can the automatic switch to the main loop power supply when the main loop resumes normally, thereby facilitate the use.
Drawings
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings in the specification:
the utility model provides a UPS power supply switching control system, including rectifier circuit REC, inverter INV, reserve battery BAT, direct current booster DC-DC, excessive pressure undervoltage detection circuitry, outage detection circuitry, switching control circuit and controller PLC;
the switching control circuit comprises a first switch and a second switch;
the input end of the rectification circuit REC is connected with a mains supply through a second change-over switch, the output end of the rectification circuit REC is connected with the input end of the inverter INV through a diode D1, the output end of the standby battery BAT is connected with the input end of the direct current booster DC-DC through a first change-over switch, the output end of the direct current booster DC-DC is connected with the input end of the inverter INV, and the output end of the inverter INV supplies power to a load; the diode is used for stopping the reverse rotation, so that the power failure detection circuit and the overvoltage and undervoltage detection circuit can work accurately, and the diode can be a diode or a diode chain formed by connecting a plurality of diodes in series according to actual needs;
the input end of the overvoltage and undervoltage detection circuit is connected to the output end of the rectifier circuit REC, the first output end of the overvoltage and undervoltage detection circuit is connected with the first control input end of the first change-over switch, the first control input end of the second change-over switch and the control input end Cri1 of the controller PLC respectively, the second control input end of the second change-over switch is connected with the control output end Cro1 of the controller PLC, the second control input end of the first change-over switch is connected with the control output end Cro2 of the controller PLC, the input end of the power-off detection circuit is connected with the second output end of the overvoltage and undervoltage detection circuit, and the output end of the power-off detection circuit is connected with the control input end Cri2 of the controller PLC; by the aid of the structure, the bypass power supply can be quickly switched to when the power supply of the main loop is unstable or is cut off, zero-crossing detection is not needed in the switching process, switching time lag is effectively reduced, power supply stability of an electric power machine room is ensured, and the main loop can be automatically switched to supply power when the main loop returns to be normal, so that the power supply is convenient to use; the whole system is also provided with an upper monitoring host, the upper monitoring host is in communication connection with the controller PLC, such as CAN bus connection, a Bluetooth module, an electric power wireless private network module or a mobile communication module; the controller PLC adopts the existing single-chip microcomputer, such as STM32 series single-chip microcomputers, STC series single-chip microcomputers, 89S51 single-chip microcomputers and the like, and users consider according to practical application environments, such as cost, communication modes and the like, and the single-chip microcomputers are provided with corresponding specification specifications, and have explanation on typical peripheral circuits and pin functions thereof, and a person skilled in the art only needs to perform corresponding circuit connection according to product specifications, and the description is omitted herein.
The rectifier circuit REC, the direct current booster DC-DC and the inverter are all in the prior art, and are not described herein.
In this embodiment, the overvoltage and undervoltage detection circuit includes a resistor R1, a resistor R2, a resistor R3, an operational amplifier U1, a comparator U2, a comparator U3, a resistor R6, an adjustable resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a triode Q2, and a triode Q3;
one end of a resistor R1 is connected with the output end of the rectifier circuit REC, the other end of the resistor R1 is grounded through a resistor R2, a common connection point between a resistor R2 and a resistor R1 serves as a second output end of the overvoltage and undervoltage detection circuit, the in-phase end of an operational amplifier U1 is connected with the common connection point between the resistor R2 and the resistor R1 through a resistor R3, the inverting end of the operational amplifier U1 is directly connected with the output end of the operational amplifier U1 to form a voltage follower, the output end of the operational amplifier U1 is connected with the in-phase end of a comparator U2 and the inverting end of a comparator U3, one end of the resistor R6 is connected with a power supply VCC, the other end of the resistor R6 is connected with one end of the resistor R8 through an adjustable resistor R7, the other end of the resistor R8 is grounded, the common connection point between the resistor R6 and the adjustable resistor R7 is connected with the inverting end of the comparator U2, the adjustable common connection point between the resistor R8 and the resistor R, the output end of the comparator U2 is connected with the base of a triode Q2 through a resistor R9, the output end of the comparator U3 is connected with the base of a triode Q2 through a resistor R10, the emitter of a triode Q2 is grounded, the collector of a triode Q2 is connected with the base of a triode Q3, the base of a triode Q3 is connected with a power VCC through a resistor R11, the emitter of a triode Q3 is connected with the power VCC through a resistor R12, the collector of a triode Q3 is grounded through a resistor R13, the collector of a triode Q3 is used as the first output end of an overvoltage and undervoltage detection circuit, wherein, the triode Q3 is a P-type triode, the resistor R1 and the resistor R2 sample voltage, the voltage sampling at the moment is direct current output by a rectifier circuit REC, therefore, when the overvoltage and undervoltage state is realized, zero-cross detection is not needed to control a silicon controlled rectifier, the resistor R3 carries out current limiting and voltage dividing, the voltage follower formed by, comparator U2 constitutes overvoltage comparison circuit, comparator U3 constitutes undervoltage comparison circuit, resistor R6, adjustable resistor R7 and resistor R8 constitute reference voltage setting circuit, through adjusting adjustable resistor R7, thereby adjust reference voltage overvoltage reference voltage and undervoltage reference voltage, convenient to use, when the voltage is normal, not overvoltage also undervoltage, comparator U2, U3 all output low level, when overvoltage or undervoltage appears, comparator U2 outputs high level or comparator U3 outputs high level, triode Q2 is conducted, thereby make three-stage mechanism Q3 conduct, the whole detection circuit outputs detection signal, the detection signal triggers thyristor Q1 to conduct, the bypass enters power supply, and also triggers thyristor Q4 to conduct, make normally closed switch K1 of relay break, thereby protect the subsequent circuit, of course, when the main circuit is cut off, the trigger signal also sends to controller PLC, the controller PLC generates an alarm signal to the upper host computer according to the current overvoltage and undervoltage state or the current power-off state, the upper host computer carries out early warning in the modes of an alarm, a display and the like, and the upper host computer informs workers of making corresponding measures as soon as possible, such as immediate access to maintenance and the like.
In this embodiment, the first switch includes a thyristor Q1, a resistor R14, a diode D3, and a MOS transistor Q6;
the positive pole of the controlled silicon Q1 is connected with the output end of the standby battery BAT, the negative pole of the controlled silicon Q1 is connected with the input end of the direct current booster circuit DC-DC, the controlled silicon Q1 is connected with one end of the resistor R14, the other end of the resistor R14 is used as the first control input end of the first change-over switch, the positive pole of the diode D3 is used as the second control input end of the first change-over switch, the negative pole of the diode D3 is connected with the grid of the MOS tube Q6, the source of the MOS tube Q6 is grounded, the drain of the MOS tube Q6 is connected with the positive pole of the controlled silicon Q1, due to the triggering characteristic of the controlled silicon, the cut-off of the controlled silicon Q1 is controlled by the MOS tube Q6, when the main loop recovers power supply, the controller PLC receives a control signal which is provided by a manual switch connected with the PLC by an operator, then the controller PLC controls the MOS tube Q6 to be turned on, the positive pole current of the controlled, and disconnecting the power supply of the standby battery.
In this embodiment, the second switch includes a relay, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a light emitting diode LED, a diode D2, a transistor Q5, and a thyristor Q4;
the control electrode of a thyristor Q4 is connected with one end of a resistor R15, the other end of the resistor R15 is used as a first control input end of a second change-over switch, the anode of a thyristor Q4 is connected with a power supply VCC through a resistor R16, the cathode of a thyristor Q6 is connected with one end of a resistor R17 through a coil J1 of a relay, the other end of a resistor R17 is grounded, the anode of a light-emitting diode LED is connected with the cathode of a thyristor Q4, the cathode of the light-emitting diode LED is grounded through a resistor R18, the collector of a triode Q5 is connected with the anode of a thyristor Q4, the emitter of a triode Q5 is grounded, the base of a triode Q5 is connected with the cathode of a diode D2, the anode of a diode D2 is used as a second control input end of the second change-over switch, a normally closed switch K1 of the relay is connected in series with the input end of a rectifier circuit REC, when the overvoltage, the normally closed switch K1 is switched off, so that the power supply of the main circuit is switched off, when the power supply of the main circuit is recovered, the controller PLC controls the triode Q5 to be switched on, so that the voltage and the current of the positive pole of the silicon controlled rectifier Q4 are reduced, the silicon controlled rectifier Q4 is cut off, the commercial power of the relay coil J1 is supplied, and the normally closed switch K1 is recovered to be in a closed state.
In this embodiment, the power failure detection circuit includes a resistor R4, a resistor R5, and an optocoupler OC 1;
one end of a resistor R4 is used as an input end of a power-off detection circuit, the other end of a resistor R4 is connected with the anode of a light-emitting diode of an optocoupler OC1, the cathode of the light-emitting diode of an optocoupler OC1 is grounded, the emitter of a phototriode of an optocoupler OC1 is grounded, the collector of the phototriode of the optocoupler OC1 is connected with a power VCC through a resistor R5, the collector of the phototriode of the optocoupler OC1 is used as an output end of the power-off detection circuit, the power-off detection circuit is used for judging whether a main loop is powered off or not through a controller PLC (programmable logic controller), because the main loop is powered off, a comparator U3 can also output a high level, at the moment, the voltage is not clearly in an undervoltage state or a power-off state, the power-off detection circuit provides a power-off detection signal for the controller PLC, the accurate alarm is favorably made for the, when the power is cut off, the optical coupler OC1 is cut off, and the control input end Cri2 of the controller PLC is at a high level, so that the power is cut off.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (5)
1. A UPS power supply switching control system is characterized in that: the system comprises a rectification circuit REC, an inverter INV, a standby battery BAT, a direct current booster DC-DC, an overvoltage and undervoltage detection circuit, a power failure detection circuit, a switching control circuit and a controller PLC;
the switching control circuit comprises a first switch and a second switch;
the input end of the rectification circuit REC is connected with a mains supply through a second change-over switch, the output end of the rectification circuit REC is connected with the input end of the inverter INV through a diode D1, the output end of the standby battery BAT is connected with the input end of the direct current booster DC-DC through a first change-over switch, the output end of the direct current booster DC-DC is connected with the input end of the inverter INV, and the output end of the inverter INV supplies power to a load;
the input of excessive pressure undervoltage detection circuit is connected in rectifier circuit REC's output, and excessive pressure undervoltage detection circuit's first output with respectively with first change over switch's first control input, second change over switch's first control input and controller PLC's control input Cri1 connection, second change over switch's second control input and controller PLC's control output Cro1 are connected, and first change over switch's second control input is connected with controller PLC's control output Cro2, outage detection circuit's input is connected with excessive pressure undervoltage detection circuit's second output, and outage detection circuit's output is connected with controller PLC's control input Cri 2.
2. The UPS power switching control system of claim 1, wherein: the overvoltage and undervoltage detection circuit comprises a resistor R1, a resistor R2, a resistor R3, an operational amplifier U1, a comparator U2, a comparator U3, a resistor R6, an adjustable resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a triode Q2 and a triode Q3;
one end of a resistor R1 is connected with the output end of the rectifier circuit REC, the other end of the resistor R1 is grounded through a resistor R2, a common connection point between a resistor R2 and a resistor R1 serves as a second output end of the overvoltage and undervoltage detection circuit, the in-phase end of an operational amplifier U1 is connected with the common connection point between the resistor R2 and the resistor R1 through a resistor R3, the inverting end of the operational amplifier U1 is directly connected with the output end of the operational amplifier U1 to form a voltage follower, the output end of the operational amplifier U1 is connected with the in-phase end of a comparator U2 and the inverting end of a comparator U3, one end of the resistor R6 is connected with a power supply VCC, the other end of the resistor R6 is connected with one end of the resistor R8 through an adjustable resistor R7, the other end of the resistor R8 is grounded, the common connection point between the resistor R6 and the adjustable resistor R7 is connected with the inverting end of the comparator U2, the adjustable common connection point between the resistor R8 and the resistor R, the output end of the comparator U2 is connected with the base of a triode Q2 through a resistor R9, the output end of the comparator U3 is connected with the base of a triode Q2 through a resistor R10, the emitter of a triode Q2 is grounded, the collector of the triode Q2 is connected with the base of the triode Q3, the base of the triode Q3 is connected with a power VCC through a resistor R11, the emitter of the triode Q3 is connected with the power VCC through a resistor R12, the collector of the triode Q3 is grounded through a resistor R13, the collector of the triode Q3 serves as the first output end of the overvoltage and undervoltage detection circuit, and the triode Q3 is a P-type triode.
3. The UPS power switching control system of claim 1, wherein: the first switch comprises a thyristor Q1, a resistor R14, a diode D3 and a MOS transistor Q6;
the positive pole of silicon controlled rectifier Q1 is connected with the output of reserve battery BAT, the negative pole of silicon controlled rectifier Q1 is connected with direct current boost circuit DC-DC's input, silicon controlled rectifier Q1 is connected with the one end of resistance R14, the other end of resistance R14 is as the first control input of first change over switch, the positive pole of diode D3 is as the second control input of first change over switch, the negative pole of diode D3 is connected with the grid of MOS pipe Q6, the source ground connection of MOS pipe Q6, the drain-source resistance of MOS pipe Q6 is connected with the positive pole of silicon controlled rectifier Q1.
4. The UPS power switching control system of claim 1, wherein: the second change-over switch comprises a relay, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a light-emitting diode LED, a diode D2, a triode Q5 and a silicon controlled rectifier Q4;
the control electrode of a controlled silicon Q4 is connected with one end of a resistor R15, the other end of a resistor R15 is used as a first control input end of a second change-over switch, the anode of a controlled silicon Q4 is connected with a power VCC through a resistor R16, the cathode of a controlled silicon Q6 is connected with one end of a resistor R17 through a coil J1 of a relay, the other end of a resistor R17 is grounded, the anode of a light-emitting diode LED is connected with the cathode of a controlled silicon Q4, the cathode of the light-emitting diode LED is grounded through a resistor R18, the collector of a triode Q5 is connected with the anode of a controlled silicon Q4, the emitter of a triode Q5 is grounded, the base of a triode Q5 is connected with the cathode of a diode D2, the anode of a diode D2 is used as a second control input end of the second change-over switch, and a normally-.
5. The UPS power switching control system of claim 1, wherein: the power failure detection circuit comprises a resistor R4, a resistor R5 and an optical coupler OC 1;
the one end of resistance R4 is as outage detection circuitry's input, the other end of resistance R4 is connected with opto-coupler OC 1's emitting diode's positive pole, opto-coupler OC 1's emitting electrode ground connection, opto-coupler OC 1's phototriode's emitter ground connection, opto-coupler OC 1's phototriode's collecting electrode passes through resistance R5 and is connected with the power VCC, opto-coupler OC 1's phototriode's collecting electrode is as outage detection circuitry's output.
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| CN201922121942.6U CN210608685U (en) | 2019-11-29 | 2019-11-29 | UPS power supply switching control system |
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| CN201922121942.6U CN210608685U (en) | 2019-11-29 | 2019-11-29 | UPS power supply switching control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112671088A (en) * | 2020-12-28 | 2021-04-16 | 国家电网有限公司 | Electric power low-voltage direct current power supply control system |
| CN113890172A (en) * | 2021-09-29 | 2022-01-04 | 国家电网有限公司 | UPS power supply system |
| CN114050642A (en) * | 2022-01-12 | 2022-02-15 | 库珀（天津）科技有限公司 | Low-cost and function block decoupling electric UPS system |
| CN114336926A (en) * | 2020-10-10 | 2022-04-12 | 一汽-大众汽车有限公司 | Main/standby power supply switching device |
| CN117458677A (en) * | 2023-12-22 | 2024-01-26 | 深圳市杰成镍钴新能源科技有限公司 | Retired battery pack recycling serial switching control system |
| CN117639197A (en) * | 2023-11-30 | 2024-03-01 | 中国建筑第四工程局有限公司 | Multi-path high-voltage direct-current power supply seamless switching circuit and method |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114336926A (en) * | 2020-10-10 | 2022-04-12 | 一汽-大众汽车有限公司 | Main/standby power supply switching device |
| CN112671088A (en) * | 2020-12-28 | 2021-04-16 | 国家电网有限公司 | Electric power low-voltage direct current power supply control system |
| CN113890172A (en) * | 2021-09-29 | 2022-01-04 | 国家电网有限公司 | UPS power supply system |
| CN113890172B (en) * | 2021-09-29 | 2024-01-12 | 国家电网有限公司 | UPS power supply system |
| CN114050642A (en) * | 2022-01-12 | 2022-02-15 | 库珀（天津）科技有限公司 | Low-cost and function block decoupling electric UPS system |
| CN114050642B (en) * | 2022-01-12 | 2023-04-14 | 库珀（天津）科技有限公司 | Low-cost and function block decoupling electric UPS system |
| CN117639197A (en) * | 2023-11-30 | 2024-03-01 | 中国建筑第四工程局有限公司 | Multi-path high-voltage direct-current power supply seamless switching circuit and method |
| CN117639197B (en) * | 2023-11-30 | 2024-06-04 | 中国建筑第四工程局有限公司 | Multi-path high-voltage direct-current power supply seamless switching circuit and method |
| CN117458677A (en) * | 2023-12-22 | 2024-01-26 | 深圳市杰成镍钴新能源科技有限公司 | Retired battery pack recycling serial switching control system |
| CN117458677B (en) * | 2023-12-22 | 2024-03-29 | 深圳市杰成镍钴新能源科技有限公司 | Retired battery pack recycling serial switching control system |
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