Emergency protection system for UPS power supply

Abstract

Disclosed is an emergency protection system for a UPS power supply, relating to the technical field of UPS power supply, comprising a power supply module for supplying power; a power supply control module, configured for electric power transmission control; a power supply state detection module, configured for detecting an abnormality in electric power; a voltage change detection module, configured for detecting an abrupt change in the electric power; a time-threshold detection module, configured for determining whether a duration, in which there is no abrupt change in the electric power, exceeds a time threshold duration while the electric power is in an abnormal state; a micro-control module, configured for signal receiving and module control; a power distribution control module, configured for supplying power to an energy storage module and transmitting electrical energy released by the energy storage module, and for performing high-frequency power regulation on the electrical energy released by the energy storage module; and an output processing module, configured for superimposing, inverting, and outputting the electric power. The emergency protection system for the UPS power supply of the present invention meets emergency power supply requirements, and controls a power supply mode of a power distribution control module according to a power supply state of a power supply module, thereby improving power supply efficiency and reducing energy storage module energy consumption.

Description

UPS power supply emergency protection system Technical Field

[0001] This invention relates to the field of UPS power supply technology, specifically to an emergency protection system for UPS power supplies. Background Technology

[0002] An UPS (Uninterruptible Power System) is an AC power supply containing energy storage devices. It primarily utilizes energy storage devices such as batteries to provide uninterrupted power to the load during power outages, ensuring the load's normal operation and preventing damage due to power failure. However, existing UPS power supplies generally rely on energy storage devices for emergency power supply when the input power source experiences a failure or abnormality. They cannot specifically control the power supply mode of the energy storage devices based on the input power supply status, leading to higher energy consumption, reduced lifespan of the energy storage devices, and potentially shortened UPS power supply duration. These shortcomings warrant improvement. Summary of the Invention

[0003] This invention provides an emergency protection system for UPS power supplies to solve the problems mentioned in the background art.

[0004] According to an embodiment of the present invention, an emergency protection system for a UPS power supply is provided, comprising: a power module, a power control module, a voltage change detection module, a power 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] The power module is used to receive AC power and to step down and rectify the AC power.

[0006] A power control module, connected to the power module and the microcontroller module, is used to transmit the rectified electrical energy from the power module and to receive the discharge signal output by the microcontroller module and stop the power transmission operation.

[0007] A power status detection module, connected to the power module and the microcontroller module, is used to perform phase shifting processing on the first reference signal output by the microcontroller module, to perform voltage division processing on the power energy after the power module has been stepped down and superimposed on the phase-shifted first reference signal to output a first potential signal, and to output a first control signal when the potential of the first potential signal is not zero.

[0008] The voltage change detection module is connected to the power supply module and is used to perform voltage division and phase shifting on the electrical energy after the power supply module has stepped down. It is used to superimpose the signal output after voltage division and the signal output after phase shifting and output a second potential signal. It is used to output 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 status detection module, is used to set a timing duration and to output a third control signal when the duration of receiving the first control signal but not receiving the second control signal exceeds the timing duration.

[0010] The microcontroller module is connected to the timing detection module, voltage change detection module, and power distribution control module. When a first control signal or a second control signal is received, it outputs a discharge signal and controls the discharge operation of the power distribution control module. When a third control signal is received, it outputs a first pulse signal and stops outputting the discharge signal. When no first or second control signal is received, it outputs a charging signal and provides a first reference signal.

[0011] The power distribution control module is connected to the power control module, the energy storage module and the output processing module. It is used to receive charging signals and transmit the electrical energy transmitted by the power control module to the energy storage module, to receive discharging signals and transmit the electrical 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 energy stored by the energy storage module.

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

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

[0014] As a further embodiment of the present invention: the power supply 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 microcontroller module includes a control chip;

[0015] Preferably, the first and second terminals of the power interface are respectively connected to the first and second terminals of the primary side of the first transformer, the first and second terminals of the secondary side of the first transformer are respectively connected to the first and second terminals of the full-wave rectifier, the third terminal of the full-wave rectifier is connected to the drain of the first field-effect transistor and connected to 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 terminal 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 embodiment 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 and fourth ends of the bidirectional conversion device are respectively connected to the IO1 and IO2 ends 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 embodiment 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 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 are all grounded. The third end and the fourth end of the inverter are respectively connected to the first end and the second end of the output port.

[0020] As a further embodiment 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, and the other end of the eighth resistor is connected to one end of the ninth resistor and one end of the tenth resistor, and through the fifteenth resistor, it is connected to one end of the fourteenth resistor, the base of the fourth transistor, and the emitter of the fifth transistor. The other end of the ninth resistor is connected to one end of the eleventh resistor, and through the fourth capacitor, it is connected to the inverting input of the first operational amplifier. The non-inverting input of the first operational amplifier is connected to one end of the twelfth resistor, and through the thirteenth resistor, it is connected to the other end of the fourteenth resistor and the output of the first operational amplifier. The emitter of the fourth transistor is connected to the collector of the fifth transistor and the base of the sixth transistor, and through the sixteenth resistor, it is connected to the second power supply and the emitter of the sixth transistor. The collector of the sixth transistor is connected to the IO7 terminal 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 embodiment of the present invention: the power status 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 shifting 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 transistor, one end of the first capacitor, one end of the third resistor, the base of the second transistor, and the output terminal of the phase-shifting processing device, the collector of the first transistor is connected to the emitter of the second transistor and the base of the third transistor, and is connected to the first power supply and the emitter of the third transistor through a fifth resistor, the collector of the third transistor is connected to the IO4 terminal of the control chip, and is connected to the collector of the second transistor, the other end of the third resistor, the other end of the first capacitor, the base of the first transistor, and the ground terminal through a fourth resistor, and the input terminal of the phase-shifting processing device is connected to the IO5 terminal of the control chip.

[0024] As a further embodiment 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 terminal of the first inverter and the B terminal of the first processing chip are respectively connected to the collector of the sixth transistor and the collector of the third transistor. The output terminal of the first inverter is connected to the A terminal of the first processing chip. The F terminal 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 grounded through the seventeenth resistor. The emitter of the eighth transistor is connected to the IO6 terminal of the control chip and connected to the other end of the fifth capacitor and ground through the 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 uses a power control module and an output processing module to perform voltage transmission and inversion processing to provide the required power. The power status detection module, in conjunction with the first reference signal provided by the microcontroller module, detects whether there is an abnormality in the incoming AC power. The voltage change detection module determines whether there is a sudden change in the AC power. When there is an abnormality or sudden change in power, the microcontroller module controls the power distribution control module to release the power stored in the energy storage module. If there is an abnormality in power and no sudden change in power occurs within a time limit, the microcontroller module controls the power distribution control module to perform high-frequency power regulation. The power is then superimposed on the power transmitted by the power control module through the output processing module to meet the emergency power supply requirements. Furthermore, the power supply mode of the power distribution control module is controlled according to the power supply status of the power module to improve power supply efficiency and reduce the consumption of the energy storage module. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 is a schematic block diagram of the emergency protection system of the UPS power supply provided in an embodiment of the present invention.

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

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

[0031] Figure 4 is a circuit diagram of the timing detection module provided in an embodiment of the present invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

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

[0034] Power module 1 is used to receive AC power and to step down and rectify the AC power.

[0035] The power control module 2 is connected to the power module 1 and the microcontroller module 6. It is used to transmit the electrical energy after rectification by the power module 1, and to receive the discharge signal output by the microcontroller module 6 and stop the power transmission.

[0036] The power status detection module 4 is connected to the power module 1 and the microcontroller module 6. It 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 power energy after the power module 1 has been stepped down and superimposed on the phase-shifted first reference signal to output a first potential signal, and to output a first control signal when the potential of the first potential signal is not zero.

[0037] The voltage change detection module 3 is connected to the power supply module 1 and is used to perform voltage division and phase shifting on the electrical energy after the power supply module 1 has stepped down. It is used to superimpose the signal output after voltage division and the signal output after phase shifting and output a second potential signal. It is used to output a second control signal when the potential of the second potential signal is not zero.

[0038] The timing detection module 5 is connected to the voltage change detection module 3 and the power status detection module 4. It is used to set the timing duration and 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.

[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. When a first control signal or a second control signal is received, it outputs a discharge signal and controls the discharge operation of the power distribution control module 7. When a third control signal is received, it outputs a first pulse signal and stops outputting the discharge signal. When no first or second control signal is received, it outputs a charging signal and provides 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. It is used to receive charging signals and transmit the electrical energy transmitted by the power control module 2 to the energy storage module 8, to receive discharging signals and transmit the electrical energy released by the energy storage module 8 to the output processing module 9, and to receive the first pulse signal and perform high-frequency regulation processing on the energy stored by the energy storage module 8.

[0041] Energy storage module 8 is used for energy storage and discharge.

[0042] The output processing module 9 is connected to the power control module 2 and is used to superimpose the electrical energy transmitted by the power control module 2 and the electrical energy after high-frequency adjustment by the power distribution control module 7. It is also used to invert the output electrical energy, the electrical energy transmitted by the power distribution control module 7 and the electrical energy transmitted by the power control module 2 after superposition processing and transmit the inverted electrical energy to the connected electrical equipment.

[0043] In a specific embodiment, the power module 1 can be a power circuit composed of a power interface, a transformer, and a rectifier, which can accept AC power and perform voltage reduction and rectification on the AC power; the power control module 2 can be a power control circuit composed of a field-effect transistor, a resistor, and a transistor, which controls the transmission state of the power; the voltage change detection module 3 can be a voltage change detection circuit composed of a resistor, an operational amplifier, a transistor, etc., which can perform phase shifting on the AC power after the power module 1 has stepped down, and superimpose the phase-shifted signal with the original signal, thereby determining whether the AC power has experienced a voltage change; the power status detection module 4 can be a power status detection circuit composed of a transistor, a resistor, a phase shifting device, etc., which can determine whether the AC power after the power module 1 has stepped down is abnormal, i.e., power failure, amplitude fluctuation, or waveform abnormality, based on the first reference signal provided by the microcontroller module 6; the aforementioned timing detection... The measurement module 5 can use a timing detection circuit composed of an inverter, logic chip, capacitor, etc., which can set the timing time and determine whether the electrical energy remains in a state without sudden change for longer than the timing time under abnormal voltage conditions, i.e., amplitude fluctuation. The microcontroller module 6 can use a microcontroller circuit composed of a single-chip microcomputer, which integrates many components such as an arithmetic unit, controller, memory, and input / output devices to realize functions such as signal processing, data storage, module control, and timing control. The power distribution control module 7 can use a power distribution control circuit composed of a transformer, field-effect transistor, bidirectional conversion device, etc., which can perform bidirectional conversion and regulation of electrical energy and high-frequency power regulation. The energy storage module 8 can use an energy storage circuit composed of energy storage devices to perform energy storage and release. The output processing module 9 can use an output processing circuit composed of capacitor, inverter, output port, etc., which can perform energy superposition, energy inversion, and energy transmission.

[0044] In another embodiment, referring to Figures 1, 2, 3, and 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 microcontroller module 6 includes a control chip U1.

[0045] Specifically, the first and second terminals of the power interface are connected to the first and second terminals of the primary side of the first transformer B1, respectively. The first and second terminals of the secondary side of the first transformer B1 are connected to the first and second terminals of the full-wave rectifier T1, respectively. The third terminal of the full-wave rectifier T1 is connected to the drain of the first field-effect transistor Q1 and is connected to 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 terminal of the control chip U1. 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] Furthermore, 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 and fourth ends of the bidirectional conversion device are connected to the IO1 and IO2 ends of the control chip U1 respectively, 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 can be a high-frequency transformer; the bidirectional conversion device can be composed of a bidirectional Boost-Buck circuit to realize bidirectional regulation and transmission of electrical energy; the energy storage device can be a battery pack; the second field-effect transistor Q2 can be an N-channel field-effect transistor to control the power transmission state of the second transformer B2.

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

[0051] Specifically, the first end of the second capacitor C2 is connected to the first end of the inverter 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 T2 are all grounded. The third and fourth ends of the inverter T2 are connected to the first and second ends of the output port, respectively.

[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 an equal voltage state; the inverter device T2 can be composed of four IGBTs to realize inverter operation.

[0053] Furthermore, 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 terminal 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 through the fifteenth resistor R15, it 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. The other end of the ninth resistor R9 is connected to one end of the eleventh resistor R11, and through the fourth capacitor, it is connected to the inverting input of the first operational amplifier OP1. The non-inverting input of the first operational amplifier OP1 is connected to one end of the twelfth resistor R12, and through the thirteenth resistor R13, it is connected to the tenth... The other end of resistor R14 is connected to the output of the first operational amplifier OP1. The emitter of the fourth transistor VT4 is connected to the collector of the fifth transistor VT5 and the base of the sixth transistor VT6. Through the sixteenth resistor R16, it is connected to the second power supply VCC2 and the emitter of the sixth transistor VT6. The collector of the sixth transistor VT6 is connected to the IO7 terminal 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 terminal 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 be an OP07 operational amplifier, which, together 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, performs phase shifting processing on the input sinusoidal voltage signal; the fourth transistor VT4 and the fifth transistor VT5 can both be NPN transistors to detect the potential value between the fifteenth resistor R15 and the fourteenth resistor R14; the sixth transistor VT6 can be a PNP transistor.

[0056] Furthermore, the power status 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 shifting 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 terminal of the phase-shifting 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 terminal 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 terminal through the fourth resistor R4. The input terminal of the phase-shifting device is connected to the IO5 terminal of the control chip U1.

[0058] In a specific embodiment, the circuit structure of the phase-shifting processing device is the same as that 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. It performs phase-shifting filtering on the first reference power supply provided by the IO5 terminal of the control chip U1, wherein the frequency and phase of the first reference signal are the same as the frequency and phase of the AC power supplied to the power module 1. Both the first transistor VT1 and the second transistor VT2 can be NPN transistors, which detect the potential between the second resistor R2 and the third resistor R3. The third transistor VT3 can be a PNP transistor.

[0059] Furthermore, 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 terminal of the first inverter U1 and the B terminal of the first processing chip U2 are respectively connected to the collector of the sixth transistor VT6 and the collector of the third transistor VT3. The output terminal of the first inverter U1 is connected to the A terminal of the first processing chip U2. The F terminal 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 grounded through the seventeenth resistor R17. The emitter of the eighth transistor VT8 is connected to the IO6 terminal of the control chip U1 and connected to the other end of the fifth capacitor C5 and ground through the eighteenth resistor R18.

[0061] In a specific embodiment, the first inverter U1 can be a NOT gate chip; the first processing chip U2 can be an AND gate chip; the seventh transistor VT7 and the second transistor VT2 can both be NPN transistors, which are stored by the fifth capacitor C5 and used in conjunction 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 in this embodiment, AC power is input through the power interface, the first transformer B1 performs voltage reduction, the full-wave rectifier T1 performs rectification, and the first field-effect transistor Q1 is triggered to conduct by the first resistor R1, transmitting 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 terminal of the control chip U1 controls the bidirectional conversion device to supply power to the energy storage device. At the same time, the IO5 terminal of the control chip U1 provides a first reference signal. The frequency and amplitude of this first reference signal are the same as the frequency and amplitude of the AC power after voltage reduction by the power module 1 when it is normal and stable. After phase shifting and filtering by the phase-shifting processing device, the signal obtained by voltage division by the second resistor R2 and the third resistor R3 is superimposed. When the stepped-down power is not interrupted, the amplitude does not fluctuate, or the waveform is not abnormal, the potential between the second resistor R2 and the third resistor R3 is zero. Simultaneously, the eighth resistor R8 and the tenth resistor R10 also undergo voltage division. The processed signal is then 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 superimposed on the original voltage-divided signal. At this point, when no voltage change occurs, the potential between the eighth resistor R8 and the tenth resistor R10 is zero. The potential between resistors R10 is zero. When the power supply experiences a power outage, amplitude fluctuation, or waveform abnormality, one of the first transistors VT1 and VT2 will conduct, causing the third transistor VT3 to conduct. This results in a high level at the IO4 terminal of control chip U1. When the power supply experiences a sudden change, one of the fourth transistors VT4 and VT5 will conduct, and the sixth transistor VT6 will conduct. This results in a high level at the IO7 terminal of control chip U1, causing the IO1 terminal of control chip U1 to control the bidirectional conversion device to release the energy stored in the energy storage device and control the ninth transistor VT9 to conduct, thus controlling the first field-effect transistor Q1 to turn off. Emergency power is then supplied by the energy storage device. When the amplitude of the stepped-down energy is lower than that of the first transistor... The amplitude of a reference signal is measured, and the power supply does not experience any sudden changes. The duration without sudden changes exceeds the set timing duration. When the charge stored in the fifth capacitor C5 reaches a certain value, the eighth transistor VT8 is triggered to conduct for the required time. When the eighth transistor VT8 conducts, the IO6 terminal of the control chip U1 receives a high level. At this time, the IO1 terminal of the control chip U1 stops outputting signals, and the IO3 terminal of the control chip U1 outputs a first pulse signal to control the conduction of the second field-effect transistor Q2. This allows the second transformer B2 to perform high-frequency regulation, and the second diode D2 to perform rectification. The rectified energy is stored in the third capacitor C3 and is superimposed with the energy stored in the second capacitor C2 to meet the power supply requirements.

[0063] It will be apparent to those skilled in the art that the present 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 its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0064] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An emergency protection system for a UPS power supply, characterized in that: The emergency protection system of this UPS power supply includes: power module, power control module, voltage change detection module, power status detection module, timing detection module, microcontroller module, power distribution control module, energy storage module and output processing module. The power module is used to receive AC power and to step down and rectify the AC power. The power control module is connected to the power module and the microcontroller module. It is used to transmit the electrical energy after rectification by the power module, and to receive the discharge signal output by the microcontroller module and stop the power transmission. The power status detection module is connected to the power module and the microcontroller module. It is used to perform phase shifting processing on the first reference signal output by the microcontroller module, to perform voltage division processing on the power energy after the power module has been stepped down and to superimpose it with the phase-shifted first reference signal 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 shifting on the electrical energy after the power supply module has stepped down. It is used to superimpose the signal output after voltage division and the signal output after phase shifting and output a second potential signal. It 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 status detection module. It is used to set the timing duration and 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 microcontroller module is connected to the timing detection module, voltage change detection module, and power distribution control module. It is used to output a discharge signal and control the discharge operation of the power distribution control module when it receives a first control signal or a second control signal; to output a first pulse signal and stop outputting the discharge signal when it receives a third control signal; to output a charging signal when it does not receive a first control signal or a second control signal; and 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. It is used to receive charging signals and transmit the electrical energy transmitted by the power control module to the energy storage module, to receive discharging signals and transmit the electrical 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 energy stored by the energy storage module. The energy storage module is used for energy storage and discharge. The output processing module is connected to the power control module and is used to superimpose the electrical energy transmitted by the power control module and the electrical energy after high-frequency adjustment by the power distribution control module. It is also used to invert the output electrical energy, the electrical energy transmitted by the power distribution control module and the electrical energy transmitted by the power control module after superposition processing and transmit the inverted electrical energy to the connected electrical equipment.

2. The emergency protection system for a UPS power supply according to claim 1, characterized in that, 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 microcontroller module includes a control chip. The first and second terminals of the power interface are respectively connected to the first and second terminals of the primary side of the first transformer. The first and second terminals of the secondary side of the first transformer are respectively connected to the first and second terminals of the full-wave rectifier. The third terminal of the full-wave rectifier is connected to the drain of the first field-effect transistor and, through the first resistor, to the gate of the first field-effect transistor and the collector of the ninth transistor. 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 terminal of the control chip. 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 for a UPS power supply according to claim 2, 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 and fourth ends of the bidirectional conversion device are connected to the IO1 and IO2 ends of the control chip, respectively. The gate of the second field-effect transistor is connected to the IO3 end of the control chip.

4. The emergency protection system for a UPS power supply according to claim 3, 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 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 are all grounded. The third end and the fourth end of the inverter are connected to the first end and the second end of the output port, respectively.

5. The emergency protection system for a UPS power supply according to claim 2, 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 through the fifteenth resistor, it is connected to one end of the fourteenth resistor, the base of the fourth transistor, and the emitter of the fifth transistor. The other end of the ninth resistor is connected to one end of the eleventh resistor, and through the fourth capacitor, it is connected to the inverting input of the first operational amplifier. The non-inverting input of the first operational amplifier is connected to one end of the twelfth resistor, and through the thirteenth resistor, it is connected to the other end of the fourteenth resistor and the output of the first operational amplifier. The emitter of the fourth transistor is connected to the collector of the fifth transistor and the base of the sixth transistor, and through the sixteenth resistor, it is connected to the second power supply and the emitter of the sixth transistor. The collector of the sixth transistor is connected to the IO7 terminal 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 terminal of the eleventh resistor, and the other end of the tenth resistor are all grounded.

6. The emergency protection system for a UPS power supply according to claim 5, characterized in that, The power status 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 shifting 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 transistor, one end of the first capacitor, one end of the third resistor, the base of the second transistor, and the output terminal of the phase-shifting device. The collector of the first transistor is connected to the emitter of the second transistor and the base of the third transistor, and is connected to the first power supply and the emitter of the third transistor through the fifth resistor. The collector of the third transistor is connected to the IO4 terminal of the control chip, and is connected to the collector of the second transistor, the other end of the third resistor, the other end of the first capacitor, the base of the first transistor, and the ground terminal through the fourth resistor. The input terminal of the phase-shifting device is connected to the IO5 terminal of the control chip.

7. The emergency protection system for a UPS power supply according to claim 6, 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 terminal of the first inverter and the B terminal of the first processing chip are respectively connected to the collector of the sixth transistor and the collector of the third transistor. The output terminal of the first inverter is connected to the A terminal of the first processing chip. The F terminal 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 grounded through the seventeenth resistor. The emitter of the eighth transistor is connected to the IO6 terminal of the control chip and connected to the other end of the fifth capacitor and ground through the eighteenth resistor.

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