Power supply multistage protection method and system

Abstract

The invention discloses a power supply multistage protection method and system, and relates to the technical field of circuit protection, and the system comprises an EMI protection module, a rectification filtering module, a radio frequency output module, a temperature monitoring module and a power protection module. The input end of the EMI protection module is connected with an input voltage, and the output end is connected with the input end of the rectification filtering module. The output end of the rectifying and filtering module is connected with the input end of the radio frequency output module; the output end of the radio frequency output module is connected with the radio frequency ion source; the input end of the temperature monitoring module is connected with the radio frequency output module and the control end of the power protection module, and the power protection module is connected with the control end of the radio frequency output module. According to the radio frequency power supply, EMI protection is carried out when the load is impacted, electromagnetic interference on the power supply is reduced, the working temperature is output to the power protection module to adjust the output power of the radio frequency output module by monitoring the circuit temperature after EMI protection, and the stability of the radio frequency power supply is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit protection, and particularly relates to a multi-level power protection method and system. Background Art

[0002] A radio frequency power supply circuit is a circuit that can provide stable and controllable radio frequency energy and is widely used in fields such as wireless communication, industrial heating, and medical equipment. The radio frequency signal provided by the radio frequency power supply is crucial for the ion source, and it needs to be kept stable to ensure the efficient operation of the ion source.

[0003] The existing radio frequency power supply protection system detects the voltage standing wave ratio or large current of the radio frequency power supply, which requires adding a large amount of additional hardware to the system. The system is complex and costly. At the same time, there is a certain lag in the detection process, and the stability of the radio frequency power supply is low. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-level power protection method and system. The present invention reduces the electromagnetic interference on the power supply by performing EMI protection when the load is impacted, and adjusts the output power of the radio frequency output module by outputting the working temperature to the power protection module after monitoring the circuit temperature after EMI protection, thereby improving the stability of the radio frequency power supply.

[0005] The purpose of the present invention is achieved by the following technical means: In a first aspect, the present invention provides a multi-level power protection system, including: an EMI protection module, a rectifier and filter module, a radio frequency output module, a temperature monitoring module, and a power protection module; The input end of the EMI protection module is connected to the input voltage, and the output end of the EMI protection module is connected to the input end of the rectifier and filter module; The output end of the rectifier and filter module is connected to the input end of the radio frequency output module; The output end of the radio frequency output module is connected to the radio frequency ion source; The input end of the temperature monitoring module is connected to the radio frequency output module, the output end of the temperature monitoring module is connected to the control end of the power protection module, and the power protection module is connected to the control end of the radio frequency output module; The EMI protection module is used to perform electromagnetic interference protection on the input voltage; The temperature monitoring module is used to monitor the temperature of the radio frequency output module and output the monitoring result to the power protection module; The power protection module is used to adjust the output power of the radio frequency output module according to the monitoring result of the temperature monitoring module.

[0006] Preferably, the rectifying and filtering module is configured to perform DC conversion on the input voltage and filter the input voltage after DC conversion; The radio frequency output module is configured to perform inversion processing and amplification processing on the filtered input voltage, and output a radio frequency signal with a set frequency to the radio frequency ion source.

[0007] Preferably, the multi-level power protection system further includes: a current monitoring module; The input end of the current monitoring module is connected to the output end of the radio frequency output module, the output end of the current monitoring module is connected to the control end of the power protection module, and the control end of the current monitoring module is connected to the output end of the temperature monitoring module; The current monitoring module is configured to monitor the output current of the radio frequency output module according to the monitoring result of the temperature monitoring module, and output the monitoring result to the power protection module.

[0008] Preferably, the power protection module includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor; The first end of the first switch is connected to the radio frequency output module, the second end of the first switch is connected to the first end of the first resistor, and the second end of the first resistor is grounded; The first end of the second switch is connected to the radio frequency output module, the second end of the second switch is connected to the first end of the second resistor, and the second end of the second resistor is grounded; The first end of the third switch is connected to the radio frequency output module, the second end of the third switch is connected to the first end of the third resistor, and the second end of the third resistor is grounded; The first end of the fourth switch is connected to the radio frequency output module, the second end of the fourth switch is connected to the first end of the fourth resistor, and the second end of the fourth resistor is grounded; The first end of the fifth switch is connected to the radio frequency output module, the second end of the fifth switch is connected to the first end of the fifth resistor, and the second end of the fifth resistor is grounded.

[0009] In a second aspect, the present invention provides a multi-level power protection method, which is applied to the above multi-level power protection system, and includes the following steps: Obtain the input voltage of the input power supply; Perform EMI protection on the input voltage, and rectify and filter the input voltage after EMI protection; Perform power conversion on the rectified and filtered input voltage, and output the input voltage after power conversion to the radio frequency ion source; Obtain the working temperature of the radio frequency output module in real time; Adjust the output power of the radio frequency output module according to the working temperature.

[0010] Preferably, the adjusting the output power of the radio frequency output module according to the working temperature includes the following steps: Compare the working temperature with a first temperature threshold; When the working temperature is greater than or equal to the first temperature threshold, convert the working temperature into binary data; Output the binary data to the power protection module; The power protection module connects a voltage-dividing resistor to the radio frequency output module according to the binary data.

[0011] Preferably, the adjusting the output power of the radio frequency output module according to the working temperature further includes the following steps; Compare the working temperature with a second temperature threshold; When the working temperature is greater than the second temperature threshold, give an over-temperature warning; Output the over-temperature signal to the current monitoring module; The current monitoring module obtains the output current of the radio frequency output module; Compare the output current with a reference current; When the output current is greater than or equal to the reference current, output a cut-off signal to the power protection module.

[0012] Preferably, the first temperature threshold is 65 °C and the second temperature threshold is 95 °C.

[0013] In a third aspect, the present invention provides an electronic device, including a processor and a memory. The memory is used to store computer program code, and the computer program code includes computer instructions. When the processor executes the computer instructions, the electronic device executes the above-mentioned power multi-level protection method.

[0014] In a fourth aspect, the present invention provides a computer-readable storage medium, in which a computer program is stored. The computer program includes program instructions. When the program instructions are executed by the processor of an electronic device, the processor is caused to execute the above-mentioned power multi-level protection method.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention reduces the electromagnetic interference on the power supply by performing EMI protection when the load is impacted. By monitoring the circuit temperature after the electromagnetic interference protection and outputting the operating temperature to the power protection module to adjust the output power of the radio frequency output module, the stability of the radio frequency power supply is improved. In this embodiment, by monitoring the output current of the radio frequency output module, secondary protection is performed when the temperature monitoring fails or is ineffective, and the monitoring result is output to the power protection module to adjust the output power of the radio frequency output module, improving the stability of the radio frequency power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings herein are incorporated into and constitute a part of this specification, showing the embodiments consistent with the present invention and, together with the specification, are used to explain the principles of the present invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of a multi-level protection system for a power supply provided in this embodiment; Figure 2 It is a schematic structural diagram of another multi-level protection system for a power supply provided in this embodiment; Figure 3 It is a schematic flowchart of a multi-level protection method for a power supply provided in this embodiment; Figure 4 It is a schematic flowchart of step S5 provided in this embodiment for adjusting the output power of the radio frequency output module according to the operating temperature; Figure 5 It is a schematic structural diagram of an electronic device provided in this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0021] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] Embodiment 1 This embodiment provides a multi-stage power protection system, as Figure 1 shown, including: an EMI protection module, a rectification and filtering module, a radio frequency output module, a temperature monitoring module, and a power protection module; The input end of the EMI protection module is connected to the input voltage, and the output end of the EMI protection module is connected to the input end of the rectification and filtering module; The output end of the rectification and filtering module is connected to the input end of the radio frequency output module; The output end of the radio frequency output module is connected to the radio frequency ion source; The input end of the temperature monitoring module is connected to the radio frequency output module, the output end of the temperature monitoring module is connected to the control end of the power protection module, and the power protection module is connected to the control end of the radio frequency output module; The EMI protection module is used to protect the input voltage from electromagnetic interference; The temperature monitoring module is used to monitor the temperature of the radio frequency output module and output the monitoring result to the power protection module; The power protection module is used to adjust the output power of the radio frequency output module according to the monitoring result of the temperature monitoring module; The rectification and filtering module is used to perform DC conversion on the input voltage and filter the input voltage after DC conversion; The radio frequency output module is used to perform inversion processing and amplification processing on the filtered input voltage and output a radio frequency signal with a set frequency to the radio frequency ion source.

[0023] It should be noted that the rectifier-filter module receives the alternating current input from the outside, rectifies the alternating current into direct current and filters out the ripple in the direct current to improve the stability of the circuit; the radio frequency output module is the core module in the radio frequency power supply, which is responsible for converting the direct current after rectification and filtering into high-frequency alternating current with the frequency required by the radio frequency ion source. On the basis of this power supply circuit, an EMI protection module is set between the input voltage and the rectifier-filter module to reduce the electromagnetic interference of the radio frequency output circuit. At the same time, the temperature of the radio frequency output module is obtained through a temperature sensor, and a temperature monitoring module and a power protection module are set to adjust the output power of the radio frequency output module according to the temperature of the radio frequency output module. Generally, when the circuit is impacted, the temperature of the radio frequency output module will rise, the output power will increase, and serious electromagnetic interference and heating will cause the occurrence of a chain failure in the circuit. Therefore, the output power of the radio frequency output module is reduced according to the temperature of the radio frequency output module, thereby further improving the stability of the radio frequency power supply.

[0024] In this embodiment, by performing EMI protection when the load is impacted, the electromagnetic interference on the power supply is reduced. By monitoring the temperature of the circuit after EMI protection, the operating temperature is output to the power protection module to adjust the output power of the radio frequency output module, improving the stability of the radio frequency power supply.

[0025] In some embodiments, as Figure 2 shown, the power multi-level protection system further includes: a current monitoring module; The input end of the current monitoring module is connected to the output end of the radio frequency output module, the output end of the current monitoring module is connected to the control end of the power protection module, and the control end of the current monitoring module is connected to the output end of the temperature monitoring module; The current monitoring module is used to monitor the output current of the radio frequency output module according to the monitoring result of the temperature monitoring module, and output the monitoring result to the power protection module.

[0026] It should be noted that the connection between the control end of the current monitoring module and the output end of the temperature monitoring module means that the current monitoring module works according to the temperature monitoring result. When the temperature of the circuit exceeds the range that the temperature monitoring module can control or the temperature monitoring module fails, it is necessary to turn on the current monitoring module and control it according to the output current of the radio frequency output module.

[0027] In this embodiment, by monitoring the output current of the radio frequency output module, secondary protection is performed when the temperature monitoring fails or is invalid, and the monitoring result is output to the power protection module to adjust the output power of the radio frequency output module, improving the stability of the radio frequency power supply.

[0028] In some embodiments, the power protection module includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor; The first end of the first switch is connected to the RF output module, the second end of the first switch is connected to the first end of the first resistor, and the second end of the first resistor is grounded; The first end of the second switch is connected to the RF output module, the second end of the second switch is connected to the first end of the second resistor, and the second end of the second resistor is grounded; The first end of the third switch is connected to the RF output module, the second end of the third switch is connected to the first end of the third resistor, and the second end of the third resistor is grounded; The first end of the fourth switch is connected to the RF output module, the second end of the fourth switch is connected to the first end of the fourth resistor, and the second end of the fourth resistor is grounded; The first end of the fifth switch is connected to the RF output module, the second end of the fifth switch is connected to the first end of the fifth resistor, and the second end of the fifth resistor is grounded.

[0029] It should be noted that the first switch, the second switch, the third switch, the fourth switch, and the fifth switch are controlled by the temperature signal input by the temperature monitoring module. When the temperature of the RF output module is higher, the temperature signal it inputs controls more voltage-dividing resistors to be connected to the control end of the RF output module, reducing the voltage at the control end, thereby reducing the output power of the RF output module.

[0030] It should be understood that the disclosed system can be implemented in other ways. For example, the system embodiments described above are merely illustrative. For example, the above-mentioned module division is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, each functional module can be integrated in a processing module, or each module can exist physically alone, or two or more modules can be integrated in one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software functional modules.

[0031] Embodiment 2 This embodiment provides a multi-level power protection method, which is applied to the above-mentioned multi-level power protection system, as Figure 3 shown, and includes the following steps: S1, obtain the input voltage of the input power supply; S2, perform EMI protection on the input voltage, and rectify and filter the input voltage after EMI protection; S3, perform power conversion on the input voltage after rectification and filtering, and output the input voltage after power conversion to the RF ion source; S4. Obtain the working temperature of the RF output module in real time; S5. Adjust the output power of the RF output module according to the working temperature.

[0032] In some embodiments, step S5, adjusting the output power of the RF output module according to the working temperature, as Figure 4 shown, includes the following steps: S51. Compare the working temperature with the first temperature threshold; S52. When the working temperature is greater than or equal to the first temperature threshold, convert the working temperature into binary data; S53. Output the binary data to the power protection module; S54. The power protection module connects a voltage-dividing resistor to the RF output module according to the binary data.

[0033] It should be noted that the temperature monitoring module needs to monitor the working temperature of the RF output module. When the working temperature of the RF output module is within the normal range or within the acceptable range of high temperature, the temperature monitoring module does not need to control the power protection module to adjust the power of the RF output module; when the working temperature of the RF output module is greater than or equal to the first threshold, the temperature monitoring module outputs the working temperature to the power protection module. In some embodiments, the first temperature threshold is 65°C. The power protection module controls the on / off of each switch according to the working temperature output by the temperature monitoring module. Specifically, the temperature monitoring module converts the working temperature into binary data, and controls the on / off of five switches by obtaining the last five bits of the binary data as the temperature signal. For example, the 0th bit of the binary data controls the on / off of the first switch, and the 1st bit of the binary data controls the on / off of the second switch, and so on. When the temperature signal is low, the control switch is turned off, and when the temperature signal is high, the control switch is turned on, and the voltage-dividing resistor connected to the switch branch is connected.

[0034] In this embodiment, by performing EMI protection when the load is impacted, the power supply is reduced from being electromagnetically interfered. By monitoring the circuit temperature after EMI protection, the working temperature is output to the power protection module to adjust the output power of the RF output module, improving the stability of the RF power supply.

[0035] In some embodiments, step S5, adjusting the output power of the RF output module according to the working temperature, further includes the following steps; Compare the working temperature with the second temperature threshold; When the working temperature is greater than the second temperature threshold, perform over-temperature warning; Output the over-temperature signal to the current monitoring module; The current monitoring module obtains the output current of the RF output module; Compare the output current with the reference current; When the output current is greater than or equal to the reference current, output a cut-off signal to the power protection module.

[0036] It should be noted that when the temperature of the RF output module is too high and exceeds the protection range of the power protection module, the protection ability of the RF power supply is insufficient. Although the voltage-dividing resistor branch of the power protection module is continuously increased, this will affect the overall structure of the circuit and increase the volume of the circuit. Moreover, when the temperature monitoring module fails, no temperature signal is output to the power protection module, and the power protection module considers that the operating temperature of the RF output module has not reached the first temperature threshold, so the RF power supply cannot be protected. Therefore, by monitoring the operating temperature, when the operating temperature is greater than or equal to the second threshold, the temperature monitoring module issues an over-temperature alarm and outputs an over-temperature signal to the current monitoring module, and then monitors the output current of the RF output module. Specifically, the temperature monitoring module outputs its own operating signal and the over-temperature signal during over-temperature to the current monitoring module. The current monitoring module determines whether to start monitoring according to the operating signal and the over-temperature signal of the temperature monitoring module. When the current monitoring module monitors that the output current is greater than or equal to the set reference current, it outputs a cut-off signal to the power protection module, and the power protection module cuts off the control voltage of the control end of the RF output module. In some embodiments, the second temperature threshold is 95 °C.

[0037] In this embodiment, by monitoring the output current of the RF output module, secondary protection is performed when the temperature monitoring fails or is ineffective, and the monitoring result is output to the power protection module to adjust the output power of the RF output module, improving the stability of the RF power supply.

[0038] Embodiment Three This embodiment provides an electronic device 2, as Figure 5 shown, a processor 21 and a memory 22. The memory 22 is used to store computer program code, and the computer program code includes computer instructions. When the processor 21 executes the computer instructions, the electronic device executes the above-mentioned power multi-level protection method.

[0039] The electronic device 2 includes a processor 21, a memory 22, an output device 23, and an input device 24. The processor 21, the memory 22, the output device 23, and the input device 24 are coupled through a connector, and the connector includes various interfaces, transmission lines, buses, etc., which are not limited in the embodiments of the present invention. It should be understood that in various embodiments of the present invention, coupling means being interconnected in a specific manner, including being directly connected or indirectly connected through other devices, for example, being connected through various interfaces, transmission lines, buses, etc.

[0040] The processor 21 may be one or more graphics processing units (GPUs). When the processor 21 is a GPU, the GPU may be a single-core GPU or a multi-core GPU. Optionally, the processor 21 may be a processor group composed of multiple GPUs, and multiple processors are coupled to each other through one or more buses. Optionally, the processor 21 may also be other types of processors, etc., which are not limited in the embodiments of the present invention.

[0041] The memory 22 can be used to store computer program instructions and various computer program codes including the program codes for executing the solution of the present invention. Optionally, the memory 22 includes but is not limited to random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or compact disc read-only memory (CD-ROM), and the memory 22 is used for relevant instructions and data.

[0042] The input device 24 is used to input data and / or signals, and the output device 23 is used to output data and / or signals. The output device 23 and the input device 24 may be independent devices or an integrated device.

[0043] This embodiment provides a computer-readable storage medium. A computer program is stored in the computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by the processor of an electronic device, the processor is caused to execute the above-mentioned power multi-level protection method.

[0044] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A multi-stage power protection system, characterized in that, Including: an EMI protection module, a rectification and filtering module, a radio frequency output module, a temperature monitoring module, and a power protection module; The input end of the EMI protection module is connected to the input voltage, and the output end of the EMI protection module is connected to the input end of the rectification and filtering module; The output end of the rectification and filtering module is connected to the input end of the radio frequency output module; The output end of the radio frequency output module is connected to a radio frequency ion source; The input end of the temperature monitoring module is connected to the radio frequency output module, the output end of the temperature monitoring module is connected to the control end of the power protection module, and the power protection module is connected to the control end of the radio frequency output module; The EMI protection module is used to perform electromagnetic interference protection on the input voltage; The temperature monitoring module is used to monitor the temperature of the radio frequency output module and output the monitoring result to the power protection module; The power protection module is used to adjust the output power of the radio frequency output module according to the monitoring result of the temperature monitoring module.

2. The multi-stage power protection system according to claim 1, characterized in that, The rectification and filtering module is used to perform DC conversion on the input voltage and filter the input voltage after DC conversion; The radio frequency output module is used to perform inversion processing and amplification processing on the filtered input voltage and output a radio frequency signal with a set frequency to the radio frequency ion source.

3. A multi - level power protection system according to claim 1, characterized in that, The power multi-stage protection system further includes: a current monitoring module; The input end of the current monitoring module is connected to the output end of the radio frequency output module, the output end of the current monitoring module is connected to the control end of the power protection module, and the control end of the current monitoring module is connected to the output end of the temperature monitoring module; The current monitoring module is used to monitor the output current of the radio frequency output module according to the monitoring result of the temperature monitoring module and output the monitoring result to the power protection module.

4. A multi-stage power protection system according to claim 1, characterized in that, The power protection module includes: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor; The first end of the first switch is connected to the radio frequency output module, the second end of the first switch is connected to the first end of the first resistor, and the second end of the first resistor is grounded; The first end of the second switch is connected to the radio frequency output module, the second end of the second switch is connected to the first end of the second resistor, and the second end of the second resistor is grounded; The first end of the third switch is connected to the radio frequency output module, the second end of the third switch is connected to the first end of the third resistor, and the second end of the third resistor is grounded; The first end of the fourth switch is connected to the radio frequency output module, the second end of the fourth switch is connected to the first end of the fourth resistor, and the second end of the fourth resistor is grounded; The first end of the fifth switch is connected to the radio frequency output module, the second end of the fifth switch is connected to the first end of the fifth resistor, and the second end of the fifth resistor is grounded.

5. A multi - level power protection method, applied to a multi - level power protection system as described in any one of claims 1 to 4, characterized in that, Including the following steps: Obtain the input voltage of the input power supply; Perform EMI protection on the input voltage, and rectify and filter the input voltage after EMI protection; Perform power conversion on the rectified and filtered input voltage, and output the input voltage after power conversion to the radio frequency ion source; Obtain the operating temperature of the radio frequency output module in real time; Adjust the output power of the radio frequency output module according to the operating temperature.

6. A multi-stage power protection method according to claim 5, characterized in that, The step of adjusting the output power of the radio frequency output module according to the operating temperature includes the following steps: Compare the operating temperature with a first temperature threshold; When the operating temperature is greater than or equal to the first temperature threshold, convert the operating temperature into binary data; Output the binary data to the power protection module; The power protection module connects a voltage-dividing resistor to the radio frequency output module according to the binary data.

7. A multi-stage power protection method according to claim 6, characterized in that The step of adjusting the output power of the radio frequency output module according to the operating temperature further includes the following steps; Compare the operating temperature with a second temperature threshold; When the operating temperature is greater than the second temperature threshold, issue an over-temperature warning; Output an over-temperature signal to the current monitoring module; The current monitoring module obtains the output current of the radio frequency output module; Compare the output current with a reference current; When the output current is greater than or equal to the reference current, output a cut-off signal to the power protection module.

8. A multi-stage power protection method according to claim 7, characterized in that, The first temperature threshold is 65 °C, and the second temperature threshold is 95 °C.

9. An electronic device, characterized in that, It includes a processor and a memory. The memory is used to store computer program code. The computer program code includes computer instructions. When the processor executes the computer instructions, the electronic device executes a multi-stage power protection method as described in any one of claims 5 to 8.

10. A computer-readable storage medium, characterized in that, A computer program is stored in the computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by the processor of the electronic device, the processor is caused to execute a multi-stage power protection method as described in any one of claims 5 to 8.

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