UPS power supply emergency protection system

Abstract

The present invention discloses an emergency protection system for a UPS power supply, and relates to the technical field of UPS power supply, including a power module for power supply; a power control module for power transmission control; a power state detection module for detecting whether an abnormality occurs in the power; a voltage change detection module for detecting whether a sudden change occurs in the power; a timing detection module for detecting whether the duration of the non-sudden change of the power exceeds the timing duration under the abnormal power state; a microcontroller module for signal reception and module control; a power distribution control module for supplying power to an energy storage module and transmitting the power released by the energy storage module, and for performing high-frequency power regulation processing on the power released by the energy storage module; and an output processing module for superposition, inversion and output of the power. The emergency protection system for a UPS power supply of the present invention meets the emergency power supply demand, controls the power supply mode of the power distribution control module according to the power supply state of the power module, improves the power supply efficiency, and reduces the consumption of the energy storage module.

Description

Technical Field

[0001] The invention relates to the technical field of UPS power supply, in particular to an emergency protection system of a UPS power supply. Background Art

[0002] UPS (Uninterruptible Power System) is an AC power supply with energy storage equipment. It mainly uses batteries and other energy storage equipment to provide uninterrupted power supply to the load during power outages, to meet the normal operation of the load and ensure that the load will not be damaged by power outages during operation. However, the existing UPS power supply generally uses the energy storage equipment for emergency power supply when the input power supply is out of power or the power supply is abnormal. It is unable to control the power supply mode of the energy storage equipment according to the power supply status of the input power supply, resulting in greater consumption of the energy storage equipment, reducing the service life of the energy storage equipment, and easily shortening the power supply time of the UPS power supply, which needs to be improved. Summary of the invention

[0003] The embodiment of the present invention provides an emergency protection system for a UPS power supply to solve the problems raised in the above background technology.

[0004] According to an embodiment of the present invention, an emergency protection system for a UPS power supply is provided, comprising: a power supply module, a power supply control module, a voltage change detection module, a power supply status detection module, a timing detection module, a microcontroller module, a power distribution control module, an energy storage module and an output processing module;

[0005] A power module is used to receive AC power and perform voltage reduction and rectification on the AC power;

[0006] A power control module, connected to the power module and the microcontroller module, for transmitting the electric energy after rectification by the power module, for receiving the discharge signal output by the microcontroller module and stopping the electric energy transmission;

[0007] A power state detection module, connected to the power module and the microcontroller module, for performing phase shift processing on the first reference signal output by the microcontroller module, for performing voltage division processing on the electric energy after voltage reduction processing by the power module and superimposing the electric energy with the first reference signal after phase shift processing and outputting a first potential signal, and for outputting a first control signal when the potential of the first potential signal is not zero;

[0008] a voltage change detection module, connected to the power module, for performing voltage division and phase shift processing on the electric energy after the voltage reduction processing of the power module, for superimposing the signal output after the voltage division processing and the signal output after the phase shift processing and outputting a second potential signal, and for outputting a second control signal when the potential of the second potential signal is not zero;

[0009] A timing detection module, connected to the voltage change detection module and the power state detection module, for setting a timing duration, and for outputting a third control signal when the duration of receiving the first control signal and not receiving the second control signal exceeds the timing duration;

[0010] a microcontroller module connected to the timing detection module, the voltage change detection module and the power distribution control module, configured to output a discharge signal and control the discharge operation of the power distribution control module when receiving the first control signal or the second control signal, to output a first pulse signal and stop outputting the discharge signal when receiving the third control signal, to output a charging signal when not receiving the first control signal or the second control signal, and to provide a first reference signal;

[0011] A power distribution control module, connected to the power control module, the energy storage module and the output processing module, for receiving a charging signal and transmitting the electric energy transmitted by the power control module to the energy storage module, for receiving a discharging signal and transmitting the electric energy released by the energy storage module to the output processing module, and for receiving a first pulse signal and performing high-frequency regulation processing on the stored energy released by the energy storage module;

[0012] Energy storage module, used for energy storage and discharge;

[0013] The output processing module is connected to the power control module, and is used to superimpose the electric energy transmitted by the power control module and the electric energy after high-frequency adjustment by the power distribution control module, and is used to invert the electric energy output after the superimposed processing, the electric energy transmitted by the power distribution control module, and the electric energy transmitted by the power control module, and transmit the inverted electric energy to the connected electrical equipment.

[0014] As a further solution of the present invention: the power module includes a power interface, a first transformer and a full-wave rectifier; the power control module includes a first field effect transistor, a first resistor, a ninth transistor and a first diode; the micro control module includes a control chip;

[0015] Preferably, the first end and the second end of the power interface are respectively connected to the first end and the second end of the primary side of the first transformer, the first end and the second end of the secondary side of the first transformer are respectively connected to the first end and the second end of the full-wave rectifier, the third end of the full-wave rectifier is connected to the drain of the first field effect transistor and the gate of the first field effect transistor and the collector of the ninth transistor through the first resistor, the emitter of the ninth transistor is grounded, the base of the ninth transistor is connected to the cathode of the first diode, the anode of the first diode is connected to the IO1 end of the control chip, and the source of the first field effect transistor is connected to the output processing module and the power distribution control module.

[0016] As a further solution of the present invention: the power distribution control module includes a bidirectional conversion device, a second transformer, a second diode and a second field effect transistor; the energy storage module includes an energy storage device;

[0017] Preferably, the first end of the bidirectional conversion device is connected to the source of the first field effect transistor, the second end of the bidirectional conversion device is connected to the first end of the energy storage device and the first end of the primary side of the second transformer, the second end of the energy storage device and the source of the second field effect transistor are both grounded, the second end of the primary side of the second transformer is connected to the drain of the second field effect transistor, the first end of the secondary side of the second transformer is connected to the anode of the second diode, the cathode of the second diode is connected to the output processing module, the second end of the secondary side of the second transformer is grounded, the third end and the fourth end of the bidirectional conversion device are respectively connected to the IO1 end and the IO2 end of the control chip, and the gate of the second field effect transistor is connected to the IO3 end of the control chip.

[0018] As a further solution of the present invention: the output processing module includes a second capacitor, a third capacitor, a sixth resistor, a seventh resistor, an inverter and an output port;

[0019] Preferably, the first end of the second capacitor is connected to the first end of the inverter device and the source of the first field effect transistor and is connected to the second end of the second capacitor, one end of the seventh resistor, one end of the third capacitor and the cathode of the second diode through the sixth resistor, the other end of the seventh resistor, the other end of the third capacitor and the second end of the inverter device are all grounded, and the third end and the fourth end of the inverter device are respectively connected to the first end and the second end of the output port.

[0020] As a further solution of the present invention: the voltage change detection module includes an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a first operational amplifier, a fifteenth resistor, a sixteenth resistor, a nineteenth resistor, a second power supply, a fourth transistor, a fifth transistor and a sixth transistor;

[0021] Preferably, one end of the eighth resistor is connected to the second end of the secondary side of the first transformer, the other end of the eighth resistor is connected to one end of the ninth resistor and one end of the tenth resistor and is connected to one end of the fourteenth resistor, the base of the fourth transistor and the emitter of the fifth transistor through the fifteenth resistor, the other end of the ninth resistor is connected to one end of the eleventh resistor and is connected to the inverting end of the first operational amplifier through the fourth capacitor, the in-phase end of the first operational amplifier is connected to one end of the twelfth resistor and is connected to the other end of the fourteenth resistor and the output end of the first operational amplifier through the thirteenth resistor, the emitter of the fourth transistor is connected to the collector of the fifth transistor, the base of the sixth transistor and is connected to the second power supply and the emitter of the sixth transistor through the sixteenth resistor, the collector of the sixth transistor is connected to the IO7 end of the control chip and one end of the nineteenth resistor, the other end of the nineteenth resistor, the base of the fifth transistor, the other end of the twelfth resistor, the Bluetooth of the eleventh resistor and the other end of the tenth resistor are all grounded.

[0022] As a further solution of the present invention: the power state detection module includes a second resistor, a third resistor, a first capacitor, a first transistor, a second transistor, a fourth resistor, a fifth resistor, a third transistor, a first power supply and a phase shift processing device;

[0023] Preferably, the first end of the second resistor is connected to the second end of the secondary side of the first transformer, the second end of the second resistor is connected to the emitter of the first triode, one end of the first capacitor, one end of the third resistor, the base of the second triode and the output end of the phase shift processing device, the collector of the first triode is connected to the emitter of the second triode and the base of the third triode and is connected to the first power supply and the emitter of the third triode through the fifth resistor, the collector of the third triode is connected to the IO4 end of the control chip and is connected to the collector of the second triode, the other end of the third resistor, the other end of the first capacitor, the base of the first triode and the ground through the fourth resistor, and the input end of the phase shift processing device is connected to the IO5 end of the control chip.

[0024] As a further solution of the present invention: the timing detection module includes a first inverter, a first processing chip, a seventh transistor, a third power supply, a seventeenth resistor, a fifth capacitor, an eighth transistor and an eighteenth resistor;

[0025] Preferably, the input end of the first inverter and the B end of the first processing chip are respectively connected to the collector of the sixth transistor and the collector of the third transistor, the output end of the first inverter is connected to the A end of the first processing chip, the F end of the first processing chip is connected to the base of the seventh transistor, the collector of the seventh transistor is connected to the third power supply and the collector of the eighth transistor, the emitter of the seventh transistor is connected to the base of the eighth transistor and one end of the fifth capacitor and is grounded through a seventeenth resistor, and the emitter of the eighth transistor is connected to the IO6 end of the control chip and is connected to the other end of the fifth capacitor and the ground through an eighteenth resistor.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the emergency protection system of the UPS power supply of the present invention performs voltage transmission and inversion processing by the power control module and the output processing module to provide the required electric energy, and the power state detection module cooperates with the first reference signal provided by the micro-control module to detect whether the AC power connected has an abnormal power situation, and the voltage change detection module determines whether the AC power has a sudden change. When the power is abnormal or sudden, the micro-control module controls the power distribution control module to release the electric energy stored in the energy storage module. When the power abnormality occurs and there is no sudden change in the power within the timing time, the micro-control module controls the power distribution control module to perform high-frequency power regulation, and the electric energy transmitted by the output processing module and the power control module is superimposed to meet the emergency power supply demand, and the power supply mode of the power distribution control module is controlled according to the power supply state of the power module to improve the power supply efficiency and reduce the consumption of the energy storage module. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 A schematic block diagram of the principle of an emergency protection system for a UPS power supply provided by an embodiment of the present invention.

[0029] Figure 2 A circuit diagram of an emergency protection system for a UPS power supply provided in an embodiment of the present invention.

[0030] Figure 3 A circuit diagram of a voltage change detection module provided in an embodiment of the present invention.

[0031] Figure 4 A circuit diagram of a timing detection module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In one embodiment, see Figure 1 , the emergency protection system of UPS power supply includes: power supply module 1, power supply control module 2, voltage change detection module 3, power supply status detection module 4, timing detection module 5, micro control module 6, power distribution control module 7, energy storage module 8 and output processing module 9;

[0034] The power module 1 is used to receive AC power and perform voltage reduction and rectification on the AC power;

[0035] The power control module 2 is connected to the power module 1 and the micro-control module 6, and is used to transmit the electric energy after rectification by the power module 1, and is used to receive the discharge signal output by the micro-control module 6 and stop the electric energy transmission work;

[0036] A power state detection module 4 is connected to the power module 1 and the microcontroller module 6, and is used to perform phase shift processing on the first reference signal output by the microcontroller module 6, to perform voltage division processing on the electric energy after voltage reduction processing by the power module 1, and to superimpose the electric energy with the first reference signal after phase shift processing and output a first potential signal, and to output a first control signal when the potential of the first potential signal is not zero;

[0037] A voltage change detection module 3, connected to the power module 1, is used to perform voltage division and phase shift processing on the electric energy after the voltage reduction processing of the power module 1, is used to superimpose the signal output after the voltage division processing and the signal output after the phase shift processing and output a second potential signal, and is used to output a second control signal when the potential of the second potential signal is not zero;

[0038] A timing detection module 5, connected to the voltage change detection module 3 and the power state detection module 4, for setting a timing duration, and for outputting a third control signal when the duration of receiving the first control signal and not receiving the second control signal exceeds the timing duration;

[0039] The microcontroller module 6 is connected to the timing detection module 5, the voltage change detection module 3 and the power distribution control module 7, and is used to output a discharge signal and control the discharge operation of the power distribution control module 7 when receiving the first control signal or the second control signal, and is used to output a first pulse signal and stop outputting the discharge signal when receiving the third control signal, and is used to output a charging signal when not receiving the first control signal or the second control signal, and is used to provide a first reference signal;

[0040] The power distribution control module 7 is connected to the power control module 2, the energy storage module 8 and the output processing module 9, and is used to receive the charging signal and transmit the electric energy transmitted by the power control module 2 to the energy storage module 8, and is used to receive the discharging signal and transmit the electric energy released by the energy storage module 8 to the output processing module 9, and is used to receive the first pulse signal and perform high-frequency regulation processing on the stored energy released by the energy storage module 8;

[0041] Energy storage module 8, used for energy storage and discharge;

[0042] The output processing module 9 is connected to the power control module 2, and is used for superimposing the electric energy transmitted by the power control module 2 and the electric energy after high-frequency adjustment by the power distribution control module 7, and for inverting the electric energy output after the superimposed processing, the electric energy transmitted by the power distribution control module 7 and the electric energy transmitted by the power control module 2, and transmitting the inverted electric energy to the connected electrical equipment.

[0043] In a specific embodiment, the power supply module 1 can adopt a power supply circuit composed of a power supply interface, a transformer and a rectifier, can connect to AC power and perform voltage reduction and rectification on the AC power; the power control module 2 can adopt a power control circuit composed of a field effect tube, a resistor and a triode to control the transmission state of the power; the voltage change detection module 3 can adopt a voltage change detection circuit composed of a resistor, an operational amplifier, a triode, etc., can perform phase shift processing on the AC power after the power supply module 1 has stepped down, and superimpose the phase-shifted signal with the original signal, and then determine whether the AC power has a sudden voltage change; the power state detection module 4 can adopt a power state detection circuit composed of a triode, a resistor, a phase shift processing device, etc., and can judge whether the AC power after the power supply module 1 has stepped down is abnormal, that is, power off, amplitude fluctuation or waveform abnormality based on the first reference signal provided by the microcontroller module 6; the timing detection The detection module 5 can adopt a timing detection circuit composed of an inverter, a logic chip, a capacitor, etc., can set the timing time, and judge whether the electric energy remains in an unchanged state for more than the timing time under the condition of abnormal voltage, that is, when the amplitude fluctuates; the above-mentioned micro-control module 6 can adopt a micro-control circuit composed of a single-chip microcomputer, which integrates many components such as an arithmetic unit, a controller, a memory, and an input and output device to realize functions such as signal processing, data storage, module control, and timing control; the above-mentioned power distribution control module 7 can adopt a power distribution control circuit composed of a transformer, a field effect transistor, a bidirectional conversion device, etc., which can perform bidirectional conversion and regulation of electric energy, and can perform high-frequency power regulation; the above-mentioned energy storage module 8 can adopt an energy storage circuit composed of energy storage equipment to perform energy storage and electric energy release; the above-mentioned output processing module 9 can adopt an output processing circuit composed of a capacitor, an inverter, an output port, etc., which can perform electric energy superposition, electric energy inversion and electric energy transmission.

[0044] In another embodiment, see Figure 1 , Figure 2 , Figure 3 and Figure 4 The power module 1 includes a power interface, a first transformer B1 and a full-wave rectifier T1; the power control module 2 includes a first field effect transistor Q1, a first resistor R1, a ninth transistor VT9 and a first diode D1; the micro control module 6 includes a control chip U1;

[0045] Specifically, the first end and the second end of the power interface are respectively connected to the first end and the second end of the primary side of the first transformer B1, the first end and the second end of the secondary side of the first transformer B1 are respectively connected to the first end and the second end of the full-wave rectifier T1, the third end of the full-wave rectifier T1 is connected to the drain of the first field effect transistor Q1 and the gate of the first field effect transistor Q1 and the collector of the ninth transistor VT9 through the first resistor R1, the emitter of the ninth transistor VT9 is grounded, the base of the ninth transistor VT9 is connected to the cathode of the first diode D1, the anode of the first diode D1 is connected to the IO1 end of the control chip U1, and the source of the first field effect transistor Q1 is connected to the output processing module 9 and the power distribution control module 7.

[0046] In a specific embodiment, the first field effect transistor Q1 can be an N-channel field effect transistor; the ninth transistor VT9 can be an NPN transistor.

[0047] Further, the power distribution control module 7 includes a bidirectional conversion device, a second transformer B2, a second diode D2 and a second field effect transistor Q2; the energy storage module 8 includes an energy storage device;

[0048] Specifically, the first end of the bidirectional conversion device is connected to the source of the first field effect transistor Q1, the second end of the bidirectional conversion device is connected to the first end of the energy storage device and the first end of the primary side of the second transformer B2, the second end of the energy storage device and the source of the second field effect transistor Q2 are both grounded, the second end of the primary side of the second transformer B2 is connected to the drain of the second field effect transistor Q2, the first end of the secondary side of the second transformer B2 is connected to the anode of the second diode D2, the cathode of the second diode D2 is connected to the output processing module 9, the second end of the secondary side of the second transformer B2 is grounded, the third end and the fourth end of the bidirectional conversion device are respectively connected to the IO1 end and the IO2 end of the control chip U1, and the gate of the second field effect transistor Q2 is connected to the IO3 end of the control chip U1.

[0049] In a specific embodiment, the second transformer B2 may be a high-frequency transformer; the bidirectional conversion device may be composed of a bidirectional Boost-Buck circuit to achieve bidirectional regulation and transmission of electric energy; the energy storage device may be a battery pack; the second field effect transistor Q2 may be an N-channel field effect transistor to control the electric energy transmission state of the second transformer B2.

[0050] Further, the output processing module 9 includes a second capacitor C2, a third capacitor C3, a sixth resistor R6, a seventh resistor R7, an inverter device T2 and an output port;

[0051] Specifically, the first end of the second capacitor C2 is connected to the first end of the inverter device T2 and the source of the first field effect transistor Q1, and is connected to the second end of the second capacitor C2, one end of the seventh resistor R7, one end of the third capacitor C3 and the cathode of the second diode D2 through the sixth resistor R6, the other end of the seventh resistor R7, the other end of the third capacitor C3 and the second end of the inverter device T2 are all grounded, and the third end and the fourth end of the inverter device T2 are respectively connected to the first end and the second end of the output port.

[0052] In a specific embodiment, the sixth resistor R6 and the seventh resistor R7 control the second capacitor C2 and the third capacitor C3 to be in a voltage-balanced state; the inverter device T2 may be composed of four groups of IGBTs to achieve inverter operation.

[0053] Further, the voltage change detection module 3 includes an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a first operational amplifier OP1, a fifteenth resistor R15, a sixteenth resistor R16, a nineteenth resistor R19, a second power supply VCC2, a fourth transistor VT4, a fifth transistor VT5 and a sixth transistor VT6;

[0054] Specifically, one end of the eighth resistor R8 is connected to the second end of the secondary side of the first transformer B1, the other end of the eighth resistor R8 is connected to one end of the ninth resistor R9 and one end of the tenth resistor R10 and is connected to one end of the fourteenth resistor R14, the base of the fourth transistor VT4 and the emitter of the fifth transistor VT5 through the fifteenth resistor R15, the other end of the ninth resistor R9 is connected to one end of the eleventh resistor R11 and is connected to the inverting end of the first operational amplifier OP1 through the fourth capacitor, the non-inverting end of the first operational amplifier OP1 is connected to one end of the twelfth resistor R12 and is connected to the tenth through the thirteenth resistor R13. The other end of the four resistors R14 and the output end of the first operational amplifier OP1, the emitter of the fourth transistor VT4 is connected to the collector of the fifth transistor VT5, the base of the sixth transistor VT6 and connected to the second power supply VCC2 and the emitter of the sixth transistor VT6 through the sixteenth resistor R16, the collector of the sixth transistor VT6 is connected to the IO7 end of the control chip U1 and one end of the nineteenth resistor R19, the other end of the nineteenth resistor R19, the base of the fifth transistor VT5, the other end of the twelfth resistor R12, the Bluetooth of the eleventh resistor R11 and the other end of the tenth resistor R10 are all grounded.

[0055] In a specific embodiment, the first operational amplifier OP1 can select an OP07 operational amplifier, and cooperate with the ninth resistor R9, the eleventh resistor R11, the twelfth resistor R12, the thirteenth resistor R13, the fourth capacitor and the fourteenth resistor R14 to perform phase shift processing on the input sinusoidal voltage signal; the fourth transistor VT4 and the fifth transistor VT5 can both select NPN transistors to detect the potential value between the fifteenth resistor R15 and the fourteenth resistor R14; the sixth transistor VT6 can select a PNP transistor.

[0056] Further, the power state detection module 4 includes a second resistor R2, a third resistor R3, a first capacitor C1, a first transistor VT1, a second transistor VT2, a fourth resistor R4, a fifth resistor R5, a third transistor VT3, a first power supply VCC1 and a phase shift processing device;

[0057] Specifically, the first end of the second resistor R2 is connected to the second end of the secondary side of the first transformer B1, the second end of the second resistor R2 is connected to the emitter of the first transistor VT1, one end of the first capacitor C1, one end of the third resistor R3, the base of the second transistor VT2 and the output end of the phase shift processing device, the collector of the first transistor VT1 is connected to the emitter of the second transistor VT2 and the base of the third transistor VT3 and is connected to the first power supply VCC1 and the emitter of the third transistor VT3 through the fifth resistor R5, the collector of the third transistor VT3 is connected to the IO4 end of the control chip U1 and is connected to the collector of the second transistor VT2, the other end of the third resistor R3, the other end of the first capacitor C1, the base of the first transistor VT1 and the ground through the fourth resistor R4, and the input end of the phase shift processing device is connected to the IO5 end of the control chip U1.

[0058] In a specific embodiment, the circuit composition structure of the phase shift processing device is the same as the circuit composition structure of the first operational amplifier OP1, the ninth resistor R9, the eleventh resistor R11, the twelfth resistor R12, the thirteenth resistor R13, the fourth capacitor and the fourteenth resistor R14, and the first reference power provided by the IO5 terminal of the control chip U1 is subjected to phase shift filtering processing, wherein the frequency and phase of the first reference signal are the same as the frequency and phase of the AC power connected to the power module 1; the first transistor VT1 and the second transistor VT2 can both be NPN transistors to detect the potential between the second resistor R2 and the third resistor R3; the third transistor VT3 can be a PNP transistor.

[0059] Further, the timing detection module 5 includes a first inverter U1, a first processing chip U2, a seventh transistor VT7, a third power supply VCC3, a seventeenth resistor R17, a fifth capacitor C5, an eighth transistor VT8 and an eighteenth resistor R18;

[0060] Specifically, the input end of the first inverter U1 and the B end of the first processing chip U2 are connected to the collector of the sixth transistor VT6 and the collector of the third transistor VT3 respectively, the output end of the first inverter U1 is connected to the A end of the first processing chip U2, the F end of the first processing chip U2 is connected to the base of the seventh transistor VT7, the collector of the seventh transistor VT7 is connected to the third power supply VCC3 and the collector of the eighth transistor VT8, the emitter of the seventh transistor VT7 is connected to the base of the eighth transistor VT8 and one end of the fifth capacitor C5 and is grounded through the seventeenth resistor R17, and the emitter of the eighth transistor VT8 is connected to the IO6 end of the control chip U1 and is connected to the other end of the fifth capacitor C5 and the ground through the eighteenth resistor R18.

[0061] In a specific embodiment, the first inverter U1 may use a NOT gate chip; the first processing chip U2 may use an AND gate chip; the seventh transistor VT7 and the second transistor VT2 may use NPN transistors, and the fifth capacitor C5 is used for energy storage and cooperates with the seventeenth resistor R17, the eighteenth resistor R18 and the third power supply VCC3 for timing control.

[0062] In the emergency protection system of the UPS power supply of this embodiment, AC power is connected to the power interface, the first transformer B1 performs voltage reduction processing, the full-wave rectifier T1 performs rectification processing, the first field effect tube Q1 is triggered to conduct by the first resistor R1, and transmits the input power to the inverter T2 and the bidirectional conversion device. When the power supply is normal, the inverter T2 performs inversion and provides power to the output port. The IO2 end of the control chip U1 controls the bidirectional conversion device to power the energy storage device. At the same time, the IO5 end of the control chip U1 provides a first reference signal. The frequency and amplitude of the first reference signal are the same as the frequency and amplitude of the AC power after the voltage reduction processing of the power module 1 when it is normal and stable. The first reference signal After the phase shifting and filtering processing by the phase shifting processing device, the signal obtained by the voltage division of the second resistor R2 and the third resistor R3 is superimposed. When the power after the voltage reduction is not cut off, the amplitude is not fluctuated or the waveform is not abnormal, the potential between the second resistor R2 and the third resistor R3 is zero. At the same time, the eighth resistor R8 and the tenth resistor R10 are also subjected to voltage division processing. The processed signal is phase-shifted by the first operational amplifier OP1, the ninth resistor R9, the eleventh resistor R11, the twelfth resistor R12, the thirteenth resistor R13, the fourth capacitor and the fourteenth resistor R14, and then superimposed with the original voltage-divided signal. At this time, when no voltage mutation occurs, the eighth resistor R8 and the tenth resistor R10 are The potential between the resistor R10 is zero. When the power supply is cut off, the amplitude fluctuates or the waveform is abnormal, one of the first transistor VT1 and the second transistor VT2 will be turned on, so that the third transistor VT3 is turned on, and the IO4 terminal of the control chip U1 obtains a high level. When the power supply suddenly changes, one of the fourth transistor VT4 and the fifth transistor VT5 is turned on, the sixth transistor VT6 is turned on, and the IO7 terminal of the control chip U1 obtains a high level, so that the IO1 terminal of the control chip U1 controls the bidirectional conversion device to release the electric energy stored in the energy storage device, and controls the ninth transistor VT9 to be turned on, controls the first field effect tube Q1 to be cut off, and the energy storage device performs emergency power supply. When the amplitude of the electric energy after the voltage reduction is lower than the first The amplitude of a reference signal, and the power supply does not undergo a sudden change, and the duration of no sudden change exceeds the set timing duration, that is, when the amount of electricity stored in the fifth capacitor C5 is stored to a certain value, the time required for the eighth transistor VT8 to be turned on is triggered, the eighth transistor VT8 is turned on, and the IO6 end of the control chip U1 obtains a high level. At this time, the IO1 end of the control chip U1 stops outputting the signal, and the IO3 end of the control chip U1 outputs the first pulse signal to control the conduction of the second field effect tube Q2, so that the second transformer B2 performs high-frequency regulation, the second diode D2 performs rectification, and the rectified electric energy is stored by the third capacitor C3, and the electric energy stored in the second capacitor C2 is superimposed on the electric energy to meet the power supply demand.

[0063] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0064] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. UPS power supply emergency protection system, Features: The emergency protection system of the UPS power supply includes: a power supply module, a power supply control module, a voltage change detection module, a power supply status detection module, a timing detection module, a microcontroller module, a power distribution control module, an energy storage module and an output processing module; The power module is used to receive AC power and perform voltage reduction and rectification on the AC power; The power control module is connected to the power module and the microcontroller module, and is used to transmit the electric energy after rectification by the power module, and is used to receive the discharge signal output by the microcontroller module and stop the electric energy transmission work; The power state detection module is connected to the power module and the microcontroller module, and is used to perform phase shift processing on the first reference signal output by the microcontroller module, to perform voltage division processing on the electric energy after voltage reduction processing by the power module, to superimpose the electric energy with the first reference signal after phase shift processing, and to output a first potential signal, and to output a first control signal when the potential of the first potential signal is not zero; The voltage change detection module is connected to the power supply module, and is used to perform voltage division and phase shift processing on the electric energy after the voltage reduction processing of the power supply module, and is used to perform superposition processing on the signal output after the voltage division processing and the signal output after the phase shift processing and output a second potential signal, and is used to output a second control signal when the potential of the second potential signal is not zero; The timing detection module is connected to the voltage change detection module and the power state detection module, and is used to set the timing duration, and is used to output a third control signal when the duration of receiving the first control signal and not receiving the second control signal exceeds the timing duration; The microcontrol module is connected to the timing detection module, the voltage change detection module and the power distribution control module, and is used to output a discharge signal and control the discharge operation of the power distribution control module when receiving the first control signal or the second control signal, and is used to output a first pulse signal and stop outputting the discharge signal when receiving the third control signal, and is used to output a charging signal when not receiving the first control signal or the second control signal, and is used to provide a first reference signal; The power distribution control module is connected to the power control module, the energy storage module and the output processing module, and is used to receive the charging signal and transmit the electric energy transmitted by the power control module to the energy storage module, to receive the discharging signal and transmit the electric energy released by the energy storage module to the output processing module, and to receive the first pulse signal and perform high-frequency regulation processing on the stored energy released by the energy storage module; The energy storage module is used to store and discharge energy; The output processing module is connected to the power supply control module, and is used to perform superposition processing on the electric energy transmitted by the power supply control module and the electric energy after high-frequency adjustment by the power distribution control module, and to perform inversion processing on the electric energy output after the superposition processing, the electric energy transmitted by the power distribution control module, and the electric energy transmitted by the power supply control module, and transmit the inverted electric energy to the connected electrical equipment.

2. The emergency protection system of the UPS power supply according to claim 1, It is characterized in that The power supply module includes a power supply interface, a first transformer and a full-wave rectifier; the power supply control module includes a first field effect transistor, a first resistor, a ninth transistor and a first diode; the micro control module includes a control chip; The first end and the second end of the power interface are respectively connected to the first end and the second end of the primary side of the first transformer, the first end and the second end of the secondary side of the first transformer are respectively connected to the first end and the second end of the full-wave rectifier, the third end of the full-wave rectifier is connected to the drain of the first field effect transistor and the gate of the first field effect transistor and the collector of the ninth transistor through the first resistor, the emitter of the ninth transistor is grounded, the base of the ninth transistor is connected to the cathode of the first diode, the anode of the first diode is connected to the IO1 end of the control chip, and the source of the first field effect transistor is connected to the output processing module and the power distribution control module.

3. The emergency protection system of the UPS power supply according to claim 2, It is characterized in that The power distribution control module includes a bidirectional conversion device, a second transformer, a second diode and a second field effect transistor; the energy storage module includes an energy storage device; The first end of the bidirectional conversion device is connected to the source of the first field effect transistor, the second end of the bidirectional conversion device is connected to the first end of the energy storage device and the first end of the primary side of the second transformer, the second end of the energy storage device and the source of the second field effect transistor are both grounded, the second end of the primary side of the second transformer is connected to the drain of the second field effect transistor, the first end of the secondary side of the second transformer is connected to the anode of the second diode, the cathode of the second diode is connected to the output processing module, the second end of the secondary side of the second transformer is grounded, the third end and the fourth end of the bidirectional conversion device are respectively connected to the IO1 end and the IO2 end of the control chip, and the gate of the second field effect transistor is connected to the IO3 end of the control chip.

4. The emergency protection system of the UPS power supply according to claim 3, It is characterized in that The output processing module includes a second capacitor, a third capacitor, a sixth resistor, a seventh resistor, an inverter and an output port; The first end of the second capacitor is connected to the first end of the inverter device and the source of the first field effect transistor, and is connected to the second end of the second capacitor, one end of the seventh resistor, one end of the third capacitor and the cathode of the second diode through the sixth resistor. The other end of the seventh resistor, the other end of the third capacitor and the second end of the inverter device are all grounded. The third end and the fourth end of the inverter device are respectively connected to the first end and the second end of the output port.

5. The emergency protection system of the UPS power supply according to claim 2, It is characterized in that The voltage change detection module includes an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a first operational amplifier, a fifteenth resistor, a sixteenth resistor, a nineteenth resistor, a second power supply, a fourth transistor, a fifth transistor and a sixth transistor; One end of the eighth resistor is connected to the second end of the secondary side of the first transformer, the other end of the eighth resistor is connected to one end of the ninth resistor and one end of the tenth resistor and is connected to one end of the fourteenth resistor, the base of the fourth transistor and the emitter of the fifth transistor through the fifteenth resistor, the other end of the ninth resistor is connected to one end of the eleventh resistor and is connected to the inverting end of the first operational amplifier through the fourth capacitor, the in-phase end of the first operational amplifier is connected to one end of the twelfth resistor and is connected to the other end of the fourteenth resistor and the output end of the first operational amplifier through the thirteenth resistor, the emitter of the fourth transistor is connected to the collector of the fifth transistor, the base of the sixth transistor and is connected to the second power supply and the emitter of the sixth transistor through the sixteenth resistor, the collector of the sixth transistor is connected to the IO7 end of the control chip and one end of the nineteenth resistor, the other end of the nineteenth resistor, the base of the fifth transistor, the other end of the twelfth resistor, the Bluetooth of the eleventh resistor and the other end of the tenth resistor are all grounded.

6. The emergency protection system of the UPS power supply according to claim 5, It is characterized in that The power state detection module includes a second resistor, a third resistor, a first capacitor, a first transistor, a second transistor, a fourth resistor, a fifth resistor, a third transistor, a first power supply and a phase shift processing device; The first end of the second resistor is connected to the second end of the secondary side of the first transformer, the second end of the second resistor is connected to the emitter of the first triode, one end of the first capacitor, one end of the third resistor, the base of the second triode and the output end of the phase shift processing device, the collector of the first triode is connected to the emitter of the second triode and the base of the third triode and is connected to the first power supply and the emitter of the third triode through the fifth resistor, the collector of the third triode is connected to the IO4 end of the control chip and is connected to the collector of the second triode, the other end of the third resistor, the other end of the first capacitor, the base of the first triode and the ground through the fourth resistor, and the input end of the phase shift processing device is connected to the IO5 end of the control chip.

7. The emergency protection system of the UPS power supply according to claim 6, It is characterized in that The timing detection module includes a first inverter, a first processing chip, a seventh transistor, a third power supply, a seventeenth resistor, a fifth capacitor, an eighth transistor and an eighteenth resistor; The input end of the first inverter and the B end of the first processing chip are connected to the collector of the sixth transistor and the collector of the third transistor respectively, the output end of the first inverter is connected to the A end of the first processing chip, the F end of the first processing chip is connected to the base of the seventh transistor, the collector of the seventh transistor is connected to the third power supply and the collector of the eighth transistor, the emitter of the seventh transistor is connected to the base of the eighth transistor and one end of the fifth capacitor and is grounded through a seventeenth resistor, and the emitter of the eighth transistor is connected to the IO6 end of the control chip and is connected to the other end of the fifth capacitor and the ground through an eighteenth resistor.

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