An uninterruptible power supply (UPS) power source

Abstract

The application discloses an uninterrupted power supply (UPS) power supply, and relates to the technical field of power supplies, which comprises a bypass control module used for controlling AC output; a delay start module used for reducing electric energy and delaying the output of the electric energy; a state detection module used for detecting the electric energy state of a power module; a charge-discharge control module used for voltage detection and control of the charge-discharge work of a first energy storage module through a logic circuit; an energy storage control module used for energy storage through a super capacitor module; a discharge control module used for receiving signals and controlling discharge work; and an inverter output module used for inversion and output. The uninterrupted power supply UPS power supply of the application controls the delay connection of input electric energy, avoids the influence of impact voltage caused by the switching and conduction of commercial power, stores the impact voltage through the energy storage control module, and the energy storage control module can be used as a charging source of the first energy storage module, thereby improving the endurance of the UPS power supply and realizing uninterrupted power supply control.

Description

Technical Field

[0001] This invention relates to the field of power supply technology, specifically to a UPS (Uninterruptible Power Supply). Background Technology

[0002] Currently, a UPS (Uninterruptible Power System) is an AC power supply containing energy storage devices. It mainly uses energy storage devices such as batteries to provide uninterrupted power to the load during power outages. When the mains power input is normal, the UPS stabilizes the mains power and supplies it to the load. When the mains power fails, the UPS uses the energy stored in the energy storage device to continue supplying AC power to the load, maintaining the normal operation of the load. Existing UPS power supplies complete the transmission control and protection control of electrical energy through the setting of constant voltage circuits, protection circuits, and power switching circuits, but lack the energy-saving utilization during power switching, resulting in unnecessary energy waste. Furthermore, the UPS power supply's endurance depends entirely on the energy storage capacity of the energy storage device, resulting in a relatively low endurance. Therefore, improvements are needed. Summary of the Invention

[0003] This invention provides a UPS power supply that provides uninterrupted power supply to solve the problems mentioned in the background art.

[0004] According to a first aspect of the present invention, an uninterruptible power supply (UPS) is provided, the UPS comprising: a power module, a rectifier module, a bypass control module, a delayed start module, a status detection module, a charge / discharge control module, a first energy storage module, an energy storage control module, a discharge control module, and an inverter output module.

[0005] The power module is used to provide AC power;

[0006] The rectifier module is connected to the power supply module and is used to rectify the input AC power and output DC power.

[0007] The bypass control module is connected to the power module and is used to receive and output AC power from the power module.

[0008] The delayed start module is connected to the power supply module and the rectifier module. It is used to reduce the electrical energy output by the power supply module and perform rectification processing. It is used to delay the operation of the relay circuit and to control the output electrical energy of the rectifier module and the power supply module through the delayed control module.

[0009] The status detection module is connected to the power module and is used to detect the power output of the power module and output a status signal.

[0010] The charging and discharging control module is connected to the delayed start module and the status detection module. It is used to detect the voltage of the first energy storage module and output a voltage signal. It is used to perform logical operations on the voltage signal and the status signal through logic circuits and control the charging and discharging operation of the first energy storage module.

[0011] The first energy storage module is connected to the charge / discharge control module and the status detection module, and is used to charge and discharge through the energy storage device;

[0012] The energy storage control module is connected to the delayed start module and is used to receive the electrical energy output by the rectifier module and store it through the supercapacitor module.

[0013] The discharge control module is connected to the energy storage control module and the first energy storage module, and is used to perform logical operations on the control commands, the status signals and the voltage signals to control the discharge operation of the energy control module.

[0014] The inverter output module is connected to the delayed start module, the charge / discharge control module, and the bypass control module. It is used to invert and output the electrical energy output by the charge / discharge control module and the delayed start module, and to directly output the electrical energy output by the bypass control module.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The uninterruptible power supply of the present invention uses a delayed start module to control the input power supply with a delayed connection, avoiding the surge voltage caused by mains power switching and conduction, reducing the impact on subsequent circuits. At the same time, it works with an energy storage control module to store the surge voltage, avoiding unnecessary energy waste during power supply operation. Furthermore, the energy storage control module can serve as a charging source for the first energy storage module, improving the endurance of the first energy storage module and extending the service life of the UPS power supply. In addition, the status detection module, the charging and discharging control module, and the energy storage control module complete the detection and control of the power supply, making the UPS power supply circuit relatively simple and easy to implement. Attached Figure Description

[0016] 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.

[0017] Figure 1 A schematic block diagram of the uninterruptible power supply (UPS) provided as an example of the present invention.

[0018] Figure 2 A circuit diagram of an uninterruptible power supply (UPS) provided for an example of the present invention.

[0019] Figure 3 A circuit diagram of a discharge control module provided for an example of the present invention. Detailed Implementation

[0020] 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.

[0021] Example 1, please refer to Figure 1 An uninterruptible power supply (UPS) includes: a power module 1, a rectifier module 2, a bypass control module 3, a delayed start module 4, a status detection module 5, a charge and discharge control module 6, a first energy storage module 7, an energy storage control module 8, a discharge control module 9, and an inverter output module 10.

[0022] Specifically, the power module 1 is used to provide AC power;

[0023] The rectifier module 2 is connected to the power supply module 1 and is used to rectify the input AC power and output DC power.

[0024] The bypass control module 3 is connected to the power module 1 and is used to receive and output the AC power output by the power module 1.

[0025] The delayed start module 4 is connected to the power module 1 and the rectifier module 2. It is used to reduce the electrical energy output by the power module 1 and perform rectification processing. It is used to delay the operation of the relay circuit and to control the output electrical energy of the rectifier module 2 and the power module 1 through the delayed control module.

[0026] The status detection module 5 is connected to the power module 1 and is used to detect the power output of the power module 1 and output a status signal.

[0027] The charging and discharging control module 6 is connected to the delayed start module 4 and the status detection module 5. It is used to detect the voltage of the first energy storage module 7 and output a voltage signal. It is used to perform logical operations on the voltage signal and the status signal through logic circuits and control the charging and discharging operation of the first energy storage module 7.

[0028] The first energy storage module 7 is connected to the charging and discharging control module 6 and the status detection module 5, and is used to charge and discharge through the energy storage device.

[0029] The energy storage control module 8 is connected to the delayed start module 4 and is used to receive the electrical energy output by the rectifier module 2 and store it through a supercapacitor module.

[0030] The discharge control module 9 is connected to the energy storage control module 8 and the first energy storage module 7, and is used to perform logical operations on the control commands, the status signals and the voltage signals to control the discharge operation of the energy control module.

[0031] Inverter output module 10 is connected to the delayed start module 4, the charge / discharge control module 6 and the bypass control module 3. It is used to invert and output the electrical energy output by the charge / discharge control module 6 and the delayed start module 4, and to directly output the electrical energy output by the bypass control module 3.

[0032] In a specific embodiment, the power supply module 1 can use mains voltage to provide the required AC power, which will not be elaborated here; the rectifier module 2 can use a full-bridge rectifier, which will not be elaborated here; the bypass control module 3 controls the transmission of AC power through a bypass switch circuit, which will not be elaborated here; the delayed start module 4 can use a delayed relay control circuit to control the delayed input of power; the status detection module 5 can use an optocoupler isolated signal transmission circuit to detect whether the power supply module 1 outputs power; the charge and discharge control module 6 can use a dual power transistor circuit to control the input and output of power; the first energy storage module 7 can use, but is not limited to, energy storage devices such as lithium batteries or accumulators for energy storage; the energy storage control module 8 can use a dedicated DC-DC regulation circuit to regulate the input power; the discharge control module 9 can use a logic operation circuit to control the shutdown of the power transistor circuit to achieve discharge operation; the inverter output module 10 can use an inverter device for inverter control, which will not be elaborated here.

[0033] Example 2, please refer to Figure 2 and Figure 3 The power module 1 includes a mains power supply; the rectifier module 2 includes a first rectifier T1 and a second rectifier T2; the status detection module 5 includes a second resistor R2, a first optocoupler U1, a third resistor R3, a ninth resistor R9, a second diode D2, and a third diode D3.

[0034] Specifically, the first end of the mains power supply is connected to the input end of the first rectifier T1, the input end of the second rectifier T2, and one end of the second resistor R2. The second end of the mains power supply is connected to the ground end of the second rectifier T2, the second end of the first optocoupler U1, and the ground end. The other end of the second resistor R2 is connected to the first end of the first optocoupler U1. The third end of the first optocoupler U1 is connected to the output end of the second rectifier T2 and the anode of the third diode D3 through the third resistor R3. The fourth end of the first optocoupler U1 is connected to the first end of the ninth resistor R9. The second end of the ninth resistor R9 is connected to the charging and discharging control module 6. The output end of the first rectifier T1 is connected to the anode of the second diode D2. The cathode of the second diode D2 is connected to the cathode of the third diode D3.

[0035] In a specific embodiment, the first optocoupler U1 can be a PC817 optocoupler, used to detect the power status of the mains power supply; the second diode D2 and the third diode D3 are both used to prevent power backflow.

[0036] Furthermore, the bypass control module 3 includes a first transistor SCR1 and a second transistor SCR2; the inverter output module 10 includes an inverter T3 and an output port;

[0037] Specifically, the anode of the first transistor SCR1 and the cathode of the second transistor SCR2 are both connected to the first terminal of the mains power supply. The cathode of the first transistor SCR1 and the anode of the second transistor SCR2 are both connected to the first terminal of the output port through the delay start module 4. The input terminal of the inverter T3 is connected to the delay start module 4, and the output terminal of the inverter T3 is connected to the second terminal of the output port.

[0038] In a specific embodiment, both the first transistor SCR1 and the second transistor SCR2 can be selected as silicon controlled rectifiers to form a bypass switch circuit for controlling the bypass transmission of electrical energy.

[0039] Furthermore, the delayed start module 4 includes a first resistor R1, a first capacitor C1, a first diode D1, a sixteenth resistor R16, a first relay K1, a first Zener diode VD1, a second capacitor C2, and a first relay switch K1-1;

[0040] Specifically, one end of the first capacitor C1 and one end of the first resistor R1 are both connected to the first terminal of the mains power supply. The other end of the first capacitor C1 is connected to the other end of the first resistor R1 and the anode of the first diode D1. The cathode of the first diode D1 is connected to one end of the first relay K1, the cathode of the first Zener diode VD1, and one end of the second capacitor C2 through the sixteenth resistor R16. The other end of the second capacitor C2, the anode of the first Zener diode VD1, and the other end of the first relay K1 are all grounded. The first, second, and third ends of the first relay switch K1-1 are respectively connected to the cathode of the first transistor SCR1, the cathode of the second diode D2, and the output terminal of the second rectifier T2. The fourth end of the first relay switch K1-1 is connected to the output port. The fifth and sixth ends of the first relay switch K1-1 are both connected to the energy storage control module 8.

[0041] In a specific embodiment, the first resistor R1 and the first capacitor C1 form a resistor-capacitor circuit to reduce the input power; the first diode D1 is used for rectification; the second capacitor C2 is used for delay control to control the delayed operation of the first relay K1; the first relay switch K1-1 can be a three-pole three-throw switch, and the first and fourth terminals, the third and sixth terminals of the first relay switch K1-1 are normally open contacts, and the second and fifth terminals of the first relay switch K1-1 are normally closed switches.

[0042] Furthermore, the energy storage control module 8 includes a charger U2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first power transistor Q1, a seventh resistor R7, a second power transistor Q2, an eighth resistor R8, a first supercapacitor CD1, and a second supercapacitor CD2.

[0043] Specifically, the first and second terminals of the charger U2 are both connected to the fifth and sixth terminals of the first relay switch K1-1. The fourth terminal of the charger U2 is connected to the ground terminal through the fourth resistor R4. The fifth, sixth, and seventh terminals of the charger U2 are all grounded. The ninth terminal of the charger U2 is connected to the gate of the first power transistor Q1 and the gate of the second power transistor Q2. It is connected to one end of the fifth resistor R5 and the tenth terminal of the charger U2 through the sixth resistor R6. The other end of the fifth resistor R5 is connected to the eleventh terminal of the charger U2, the source of the first power transistor Q1, and the first terminal of the first supercapacitor CD1. The drain of the first power transistor Q1 is connected to one end of the eighth resistor R8 and the drain of the second power transistor Q2 through the seventh resistor R7. The source of the second power transistor Q2 is connected to the second terminal of the first supercapacitor CD1 and the first terminal of the second supercapacitor CD2. The other end of the eighth resistor R8 and the second terminal of the second supercapacitor CD2 are both grounded.

[0044] In a specific embodiment, the charger U2 can be an LTC4079 chip; the first power transistor Q1 and the second power transistor Q2 can both be P-channel enhancement-mode MOSFETs, used to control the charging of the first supercapacitor CD1 and the second supercapacitor CD2.

[0045] Furthermore, the charge / discharge control module 6 includes a tenth resistor R10, a second Zener diode VD2, a first potentiometer RP1, an eleventh resistor R11, a twelfth resistor R12, a third power transistor Q3, a fourth power transistor Q4, and an inverter U3; the first energy storage module 7 includes an energy storage device.

[0046] Specifically, the input terminal of the inverter U3 is connected to the second terminal of the ninth resistor R9. The gate of the fourth power transistor Q4 is connected to the anode of the second Zener diode VD2 through the tenth resistor R10. The cathode of the second Zener diode VD2 is connected to the slider terminal of the first potentiometer RP1, one end of the eleventh resistor R11, and one end of the twelfth resistor R12 through the first potentiometer RP1. The other end of the eleventh resistor R11 is connected to the first terminal of the energy storage device and the source of the fourth power transistor Q4. The other end of the twelfth resistor R12 is grounded. The drain of the fourth power transistor Q4 is connected to the drain of the third power transistor Q3. The source of the third power transistor Q3 is connected to the sixth terminal of the first relay switch K1-1. The output terminal of the inverter U3 is connected to the gate of the third power transistor Q3.

[0047] In a specific embodiment, the inverter U3 is used for polarity reversal, and the specific model is not limited; the third power transistor Q3 can be an N-channel enhancement-mode MOSFET, and the fourth power transistor Q4 can be a P-channel enhancement-mode MOSFET. The third power transistor Q3 is used for discharge control, and the fourth power transistor Q4 is used for charging control.

[0048] Furthermore, the discharge control module 9 includes a thirteenth resistor R13, a fourteenth resistor R14, a first logic chip J1, a second logic chip J2, control commands, a third Zener diode VD3, a fifteenth resistor R15, and a fifth power transistor Q5;

[0049] Specifically, one end of the thirteenth resistor R13 and one end of the fourteenth resistor R14 are respectively connected to the first end of the ninth resistor R9 and the anode of the second Zener diode VD2. The other ends of the thirteenth resistor R13 and the fourteenth resistor R14 are respectively connected to the first input terminal and the second input terminal of the first logic chip J1. The output terminal and the control command of the first logic chip J1 are respectively connected to the first input terminal and the second input terminal of the second logic chip J2. The output terminal of the second logic chip J2 is connected to the cathode of the third Zener diode VD3, one end of the fifteenth resistor R15, and the gate of the fifth power transistor Q5. The source of the fifth power transistor Q5 is connected to the first terminal of the first supercapacitor CD1. The anode of the third Zener diode VD3, the other end of the fifteenth resistor R15, and the drain of the fifth power transistor Q5 are all connected to the first terminal of the energy storage device.

[0050] In a specific embodiment, the first logic chip J1 can be a NOR gate logic chip, and the second logic chip J2 can be an AND logic chip; the specific models are not limited. The control instruction is a control instruction that requires the first supercapacitor CD1 and the second supercapacitor CD2 to discharge; it is a high-level signal, and the method of generating the control instruction is not limited. The fifth power transistor Q5 can be an N-channel enhancement-mode MOSFET.

[0051] This invention discloses an uninterruptible power supply (UPS) that receives AC power from the mains power supply. The AC power output from the mains power supply controls the operation of a delayed start module 4. In the delayed start module 4, the voltage is stepped down by a first resistor R1 and a first capacitor C1, and rectified by a first diode D1 to charge a second capacitor C2. After a delay, when the operating requirements of the first relay K1 are met, the first relay K1 is energized to control the operation of the first relay switch K1-1. During the delay period, a period of high voltage energy is easily generated due to the switching and power input. To avoid affecting subsequent power and to prevent energy waste, this energy is received by the energy storage control module 8 and stored by the first supercapacitor CD1 and the second supercapacitor CD2. After the delay, due to the control of the first relay K1, the first and fourth terminals, and the third and sixth terminals of the first relay K1 are closed. When AC power needs to be directly supplied through the bypass control module 3, the first transistor SCR1 and the second supercapacitor CD2 are controlled. The conduction of the two transistors SCR2 is sufficient. When the output AC power needs to be processed, the second rectifier T2 rectifies the AC power output from the mains power supply, and the first optocoupler U1 detects whether the mains voltage is in a power supply or power failure state. When in a power supply state, the inverter U3 outputs a low level, and the third power transistor Q3 is cut off. When the power is cut off, the third power transistor Q3 is turned on and is in a discharging state. When the second Zener diode VD2 is broken down, the fourth power transistor Q4 is cut off. When it is not broken down, the fourth power transistor Q4 is turned on and is in a charging state, so as to complete the energy storage of the energy storage device and the power supply when the mains power supply is cut off. At the same time, when the mains power supply is detected to be cut off and the energy storage device is not fully charged, the first logic chip J1 outputs a high level, and sends a high level signal in conjunction with the control command, so that the second logic chip J2 outputs a high level to control the fifth power transistor Q5 to conduct, so that the first supercapacitor CD1 and the second supercapacitor CD2 provide power to the energy storage device, improving the endurance of the UPS power supply and avoiding energy waste.

[0052] 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.

[0053] 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. A UPS (Uninterruptible Power Supply) characterized in that: The uninterruptible power supply includes: a power module, a rectifier module, a bypass control module, a delayed start module, a status detection module, a charge and discharge control module, a first energy storage module, an energy storage control module, a discharge control module, and an inverter output module. The power module is used to provide AC power; The rectifier module is connected to the power supply module and is used to rectify the input AC power and output DC power. The bypass control module is connected to the power module and is used to receive and output AC power from the power module. The delayed start module is connected to the power supply module and the rectifier module. It is used to reduce the electrical energy output by the power supply module and perform rectification processing. It is used to delay the operation of the relay circuit and to control the output electrical energy of the rectifier module and the power supply module through the delayed control module. The status detection module is connected to the power module and is used to detect the power output of the power module and output a status signal. The charging and discharging control module is connected to the delayed start module and the status detection module. It is used to detect the voltage of the first energy storage module and output a voltage signal. It is used to perform logical operations on the voltage signal and the status signal through logic circuits and control the charging and discharging operation of the first energy storage module. The first energy storage module is connected to the charge / discharge control module and the status detection module, and is used to charge and discharge through the energy storage device; The energy storage control module is connected to the delayed start module and is used to receive the electrical energy output by the rectifier module and store it through the supercapacitor module. The discharge control module is connected to the energy storage control module and the first energy storage module, and is used to perform logical operations on the control commands, the status signals and the voltage signals to control the discharge operation of the energy storage control module. The inverter output module is connected to the delayed start module, the charge / discharge control module, and the bypass control module. It is used to invert and output the electrical energy output by the charge / discharge control module and the delayed start module, and to directly output the electrical energy output by the bypass control module.

2. The UPS power supply according to claim 1, characterized in that, The power supply module includes a mains power supply; the rectifier module includes a first rectifier and a second rectifier; the status detection module includes a second resistor, a first optocoupler, a third resistor, a ninth resistor, a second diode, and a third diode; The first end of the mains power supply is connected to the input end of the first rectifier, the input end of the second rectifier, and one end of the second resistor. The second end of the mains power supply is connected to the ground end of the second rectifier, the second end of the first optocoupler, and the ground end. The other end of the second resistor is connected to the first end of the first optocoupler. The third end of the first optocoupler is connected to the output end of the second rectifier and the anode of the third diode through the third resistor. The fourth end of the first optocoupler is connected to the first end of the ninth resistor. The second end of the ninth resistor is connected to the charge / discharge control module. The output end of the first rectifier is connected to the anode of the second diode, and the cathode of the second diode is connected to the cathode of the third diode.

3. The UPS power supply according to claim 2, characterized in that, The bypass control module includes a first transistor and a second transistor; the inverter output module includes an inverter and an output port. The anode of the first transistor and the cathode of the second transistor are both connected to the first terminal of the mains power supply. The cathode of the first transistor and the anode of the second transistor are both connected to the first terminal of the output port through the delayed start module. The input terminal of the inverter is connected to the delayed start module, and the output terminal of the inverter is connected to the second terminal of the output port.

4. The UPS power supply according to claim 3, characterized in that, The delayed start module includes a first resistor, a first capacitor, a first diode, a sixteenth resistor, a first relay, a first Zener diode, a second capacitor, and a first relay switch; One end of the first capacitor and one end of the first resistor are both connected to the first terminal of the mains power supply. The other end of the first capacitor is connected to the other end of the first resistor and the anode of the first diode. The cathode of the first diode is connected to one end of the first relay, the cathode of the first Zener diode, and one end of the second capacitor through the sixteenth resistor. The other end of the second capacitor, the anode of the first Zener diode, and the other end of the first relay are all grounded. The first, second, and third ends of the first relay switch are respectively connected to the cathode of the first transistor, the cathode of the second diode, and the output terminal of the second rectifier. The fourth end of the first relay switch is connected to the output port. The fifth and sixth ends of the first relay switch are both connected to the energy storage control module.

5. The UPS power supply according to claim 4, characterized in that, The energy storage control module includes a charger, a fourth resistor, a fifth resistor, a sixth resistor, a first power transistor, a seventh resistor, a second power transistor, an eighth resistor, a first supercapacitor, and a second supercapacitor; The first and second terminals of the charger are both connected to the fifth and sixth terminals of the first relay switch. The fourth terminal of the charger is connected to the ground terminal through the fourth resistor. The fifth, sixth, and seventh terminals of the charger are all grounded. The ninth terminal of the charger is connected to the gate of the first power transistor and the gate of the second power transistor, and is connected to one end of the fifth resistor and the tenth terminal of the charger through the sixth resistor. The other end of the fifth resistor is connected to the eleventh terminal of the charger, the source of the first power transistor, and the first terminal of the first supercapacitor. The drain of the first power transistor is connected to one end of the eighth resistor and the drain of the second power transistor through the seventh resistor. The source of the second power transistor is connected to the second terminal of the first supercapacitor and the first terminal of the second supercapacitor. The other end of the eighth resistor and the second terminal of the second supercapacitor are both grounded.

6. The UPS power supply according to claim 5, characterized in that, The charge / discharge control module includes a tenth resistor, a second Zener diode, a first potentiometer, an eleventh resistor, a twelfth resistor, a third power transistor, a fourth power transistor, and an inverter; the first energy storage module includes an energy storage device. The input terminal of the inverter is connected to the second terminal of the ninth resistor. The gate of the fourth power transistor is connected to the anode of the second Zener diode through the tenth resistor. The cathode of the second Zener diode is connected to the slider terminal of the first potentiometer, one end of the eleventh resistor, and one end of the twelfth resistor through the first potentiometer. The other end of the eleventh resistor is connected to the first terminal of the energy storage device and the source of the fourth power transistor. The other end of the twelfth resistor is grounded. The drain of the fourth power transistor is connected to the drain of the third power transistor. The source of the third power transistor is connected to the sixth terminal of the first relay switch. The output terminal of the inverter is connected to the gate of the third power transistor.

7. The UPS power supply according to claim 6, characterized in that, The discharge control module includes a thirteenth resistor, a fourteenth resistor, a first logic chip, a second logic chip, control instructions, a third Zener diode, a fifteenth resistor, and a fifth power transistor; One end of the thirteenth resistor and one end of the fourteenth resistor are respectively connected to the first end of the ninth resistor and the anode of the second Zener diode. The other ends of the thirteenth resistor and the fourteenth resistor are respectively connected to the first input terminal and the second input terminal of the first logic chip. The output terminal and the control command of the first logic chip are respectively connected to the first input terminal and the second input terminal of the second logic chip. The output terminal of the second logic chip is connected to the cathode of the third Zener diode, one end of the fifteenth resistor, and the gate of the fifth power transistor. The source of the fifth power transistor is connected to the first terminal of the first supercapacitor. The anode of the third Zener diode, the other end of the fifteenth resistor, and the drain of the fifth power transistor are all connected to the first terminal of the energy storage device.

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