Household energy storage system and method and self-feedback rotating speed regulator and method

Abstract

The invention discloses a household energy storage system and method and a self-feedback rotating speed regulator and method, and relates to the technical field of new energy. The household energy storage system comprises a reversible motor, a spring energy storage device and a self-feedback rotating speed regulator; the spring energy storage device is connected with the reversible motor through the self-feedback rotating speed regulator and used for conducting energy conversion with the reversible motor and storing or releasing elastic potential energy. The self-feedback rotating speed regulator corrects the elastic modulus of nonlinear transformation of the spring energy storage device into linear change, so that the rotor of the reversible motor is kept at the rated rotating speed, and the generated alternating current frequency is kept at the household electricity frequency. The self-feedback rotating speed regulator can avoid potential safety hazards caused by a lithium battery, is longer in service life than the lithium battery, free of capacity fading, capable of storing energy for a long time and more suitable for household use, can keep the generated alternating current frequency at the household electricity frequency, and is convenient for household appliances to use.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a household energy storage system and method, and a self-feedback speed regulator and method. Background Art

[0002] Residential Energy Storage refers to an energy storage system installed in a personal residence, which is used to store electricity provided by photovoltaic panels or other renewable energy sources. It plays an important role in promoting the development of distributed energy and alleviating the tight electricity consumption situation of Chinese residents. The structure of residential energy storage is mainly composed of rooftop photovoltaics, energy storage systems, public power grids and household loads. Its working principle is as follows: Figure 1 As shown. Among them, the energy storage system is the most core component of household energy storage, which is directly related to the service life and operational stability of household energy storage. At present, household energy storage uses lithium-ion batteries as energy storage systems to store and release electrical energy. However, there is currently no reliable and effective method to fundamentally solve the safety problems of lithium-ion battery systems. In addition, the short service life of lithium batteries (8-10 years), short-term energy storage (1-4 hours) and problems caused by lithium battery capacity attenuation have brought great troubles to the user experience and maintenance of residential users. Summary of the invention

[0003] In order to solve the above problems, the inventors have made the present invention, and through specific implementation methods, provide a household energy storage system and method, a self-feedback speed regulator and method.

[0004] In a first aspect, an embodiment of the present invention provides a household energy storage system, including a reversible motor, a spring energy storage device, and a self-feedback speed regulator;

[0005] The spring energy storage device is connected to the reversible motor through a self-feedback speed regulator, and is used to perform energy conversion with the reversible motor, and store or release elastic potential energy;

[0006] The self-feedback speed regulator comprises a first gear, a second gear, an electromagnetic controller, and an elastic connecting belt; the first gear and the second gear are connected by an elastic connecting belt transmission, the first gear is connected to the rotating shaft of the spring energy storage device, and the second gear is connected to the reversible motor rotor;

[0007] In the energy release mode, the electromagnetic controller is used to determine the feedback value of the hub radius of the first gear based on the hub radius of the second gear, the rated speed and the real-time speed of the first gear, and dynamically adjust the hub radius of the first gear according to the feedback value to keep the second gear at the rated speed.

[0008] Specifically, the first gear includes an elastic magnetic composite material and an electromagnetic hub bracket, the elastic magnetic composite material constitutes a first gear hub, and the electromagnetic hub bracket electrically supports the elastic magnetic composite material.

[0009] Specifically, the electromagnetic controller is also used to calculate the current or voltage required to adjust to the first gear hub radius feedback value based on the first gear hub radius feedback value, and dynamically adjust the supporting force of the electromagnetic hub bracket accordingly to adjust the first gear hub radius to the first gear hub radius feedback value.

[0010] Specifically, in the energy release mode, the electromagnetic controller determines R1 according to R1×V1=R2×V2, and adjusts the radius of the first gear hub to R1, where R1 is the real-time feedback value of the radius of the first gear hub, V1 is the real-time speed of the first gear, R2 is the radius of the second gear hub, and V2 is the rated speed of the second gear.

[0011] Specifically, the self-feedback speed regulator also includes a speed monitoring device for monitoring the real-time speed of the first gear and feeding back the speed to the electromagnetic controller.

[0012] Specifically, in the energy storage mode, the reversible motor is used to receive electrical energy, the reversible motor rotor drives the second gear to rotate, the first gear is driven by the second gear, and the first gear drives the spring energy storage device rotating shaft to rotate, thereby increasing the elastic potential energy of the spring energy storage device.

[0013] Specifically, the reversible motor is electrically connected to the photovoltaic power generation system, the household load, and the public power grid respectively.

[0014] In a second aspect, an embodiment of the present invention provides a household energy storage method, comprising the following steps:

[0015] The spring energy storage device is connected to the reversible motor through a self-feedback speed regulator, wherein the self-feedback speed regulator comprises a first gear, a second gear, an electromagnetic controller, and an elastic connecting belt; the first gear and the second gear are connected through an elastic connecting belt transmission, the first gear is connected to the rotating shaft of the spring energy storage device, and the second gear is connected to the rotor of the reversible motor;

[0016] In the energy release mode, the electromagnetic controller determines the feedback value of the hub radius of the first gear based on the hub radius of the second gear, the rated speed and the real-time speed of the first gear, and dynamically adjusts the hub radius of the first gear according to the feedback value to keep the second gear at the rated speed.

[0017] In a third aspect, an embodiment of the present invention provides a self-feedback speed regulator, comprising a first gear, a second gear, an electromagnetic controller, and an elastic connecting belt; the first gear and the second gear are connected by an elastic connecting belt transmission, the first gear is connected to the rotating shaft of the spring energy storage device, and the second gear is connected to the reversible motor rotor;

[0018] In the energy release mode of the spring energy storage device, the electromagnetic controller is used to determine the feedback value of the hub radius of the first gear based on the hub radius of the second gear, the rated speed and the real-time speed of the first gear, and dynamically adjust the hub radius of the first gear according to the feedback value to keep the second gear at the rated speed.

[0019] In a fourth aspect, an embodiment of the present invention provides a self-feedback speed regulation method, comprising the following steps:

[0020] The first gear and the second gear are connected through an elastic connecting belt transmission, the first gear is connected to the rotating shaft of the spring energy storage device, and the second gear is connected to the reversible motor rotor;

[0021] In the energy release mode of the spring energy storage device, the electromagnetic controller determines the feedback value of the hub radius of the first gear based on the hub radius of the second gear, the rated speed and the real-time speed of the first gear, and dynamically adjusts the hub radius of the first gear according to the feedback value to keep the second gear at the rated speed.

[0022] The beneficial effects of the above technical solution provided by the embodiment of the present invention include at least:

[0023] The household energy storage solution provided by the embodiment of the present invention can avoid the safety hazards caused by lithium batteries, and has a longer life than lithium batteries, no capacity decay, can store energy for a long time, is more suitable for household use, and effectively solves the problem of difficult energy storage in remote areas, isolated islands, and areas with underdeveloped power grids.

[0024] The self-feedback speed regulation scheme provided in the embodiment of the present invention can correct the elastic modulus of the nonlinear transformation of the spring energy storage device into a linear change. When the spring shaft drives the reversible motor rotor, the reversible motor rotor can be kept at the rated speed, thereby keeping the frequency of the generated alternating current at the household power frequency, which is convenient for the use of household appliances.

[0025] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0026] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1This is a diagram of a household energy storage structure in the prior art;

[0029] Figure 2 This is a structural diagram of a household energy storage system in an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of a self-feedback speed regulator during the energy release process of an embodiment of the present invention;

[0031] Figure 4 This is a flow chart of a household energy storage method in an embodiment of the present invention;

[0032] Figure 5 The figure is a structural diagram of a self-feedback speed regulator in an embodiment of the present invention.

[0033] Figure 6 The figure is a flow chart of a self-feedback speed regulation method in an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0035] In order to solve the problems existing in the prior art, embodiments of the present invention provide a household energy storage system and method, and a self-feedback speed regulator and method.

[0036] The embodiment of the present invention provides a household energy storage system, the structure of which is as follows: Figure 2 As shown, it includes a reversible motor, a spring energy storage device and a self-feedback speed regulator. The reversible motor is used as an electric energy conversion device to optimize the structural composition of traditional mechanical elastic energy storage and reduce the investment cost of equipment such as synchronous motors and synchronous generators in traditional mechanical elastic energy storage systems. The spring energy storage device can be a variety of specific implementation forms such as a plane scroll spring, an industrial spring, and a spring buffer.

[0037] Household energy storage is different from distributed energy storage. Distributed energy storage is an energy storage system installed near the power grid to store excess electricity in the power grid to relieve network load pressure. The difference between household energy storage and distributed energy storage lies in their different application scenarios, scales and operation modes. Household energy storage is mainly used for energy management of a single residence. It is small in scale. Each family or building has its own independent system. The energy storage equipment is directly connected to the photovoltaic panels or wind turbines, which enables the family to use the stored electricity at any time and provide emergency backup power when the power grid is out of power; distributed energy storage is mainly used in large power grids, which can handle larger-scale energy storage and release. It adopts a centralized operation mode, that is, all energy storage devices are concentrated in one location for management and control, so that the energy storage capacity can be dispatched more efficiently to meet the needs of the power grid. Therefore, although both involve new energy generation, the technical solutions of distributed energy storage cannot be directly applied to household energy storage. Household energy storage and distributed energy storage play an important role in different scenarios to meet people's diverse needs for energy.

[0038] Since distributed energy storage is used in large power grids, it is still subject to grid coordination. When there is insufficient grid coordination space, distributed energy storage may be forced to be abandoned, resulting in waste. Although household energy storage can also input surplus electricity into the grid when there is surplus electricity, since household energy storage is mainly for the electricity demand of a single residence, the surplus electricity is very limited and the impact on grid coordination can be ignored. Therefore, household energy storage will not be limited by grid coordination. Therefore, when problems occur with Automatic Generation Control (AGC) and Automatic Voltage Control (AVC) and grid coordination is under pressure, household energy storage can be independent of the grid and protect users from the impact of the grid. Therefore, the installed capacity of household energy storage is growing rapidly in Europe and the United States.

[0039] At present, household energy storage uses lithium batteries for energy storage. Although lithium battery technology has made great progress, if used improperly or encounter unexpected situations, lithium batteries have the risk of fire and explosion. Users of household energy storage are usually families or non-power technicians, and their ability to deal with safety risks is relatively limited. The energy storage device is located in the living area, which is densely populated and difficult to deal with risks. Users of distributed energy storage are usually professional power companies or professional power technicians, who have a strong ability to deal with safety risks. Therefore, household energy storage has higher requirements for safety and stability. Since users of household energy storage are more sensitive to safety, the household energy storage technology solution that uses lithium batteries for energy storage is difficult to promote and apply. The household energy storage provided in this embodiment uses a spring energy storage device instead of a lithium battery for energy storage. It is safer than a lithium battery, has a longer life, no capacity decay, can store energy for a long time, and is more suitable for household use.

[0040] The problem with applying spring energy storage devices to household energy storage is that the biggest disadvantage of current spring energy storage power generation is low precision. This is because the centrifugal force of the mainspring in the energy release stage is a non-steady-state change, and there is a variable acceleration, which causes the rotation speed of the linkage shaft to gradually decrease from large to small, thereby causing the rotor speed that cuts the magnetic lines of force in the reversible motor to be non-constant, so that the frequency of the generated AC power is not the household power frequency (50Hz), affecting the use of household appliances. In order to solve this problem, an embodiment of the present invention provides a self-feedback speed regulator, which keeps the reversible motor rotor at the rated speed when the mechanical energy of the elastic energy storage device drives the reversible motor rotor, and keeps the generated AC power frequency at the household power frequency, which is convenient for the use of household appliances.

[0041] The spring energy storage device is connected to the reversible motor through a self-feedback speed regulator, and is used to convert energy with the reversible motor to store or release elastic potential energy; Figure 2 As shown, the household energy storage system provided in this embodiment includes an energy release mode and an energy storage mode. During the energy release process, the spring energy storage device rebounds, the stored elastic potential energy is released, and the reversible motor in the generator mode is driven to generate electricity, thereby realizing the conversion of mechanical energy to electrical energy. During the energy storage process, the reversible motor rotor in the motor mode rotates, driving the spring energy storage device to contract, and the elastic potential energy of the spring energy storage device increases, thereby realizing the conversion of electrical energy to mechanical energy.

[0042] The self-feedback speed regulator comprises a first gear, a second gear, an electromagnetic controller, and an elastic connecting belt; the first gear and the second gear are connected by an elastic connecting belt transmission, the first gear is connected to the rotating shaft of the spring energy storage device, and the second gear is connected to the reversible motor rotor;

[0043] In the energy release mode, the electromagnetic controller is used to determine the first gear hub radius feedback value according to the hub radius of the second gear, the rated speed and the real-time speed of the first gear, and dynamically adjust the first gear hub radius according to the feedback value to keep the second gear at the rated speed. Figure 3 As shown, in the energy release mode, the rotating shaft of the spring energy storage device drives the first gear to rotate, and the first gear is the driving gear. Through the elastic connecting belt, the second gear is driven by the first gear, and the second gear is the driven gear.

[0044] In some specific embodiments, the first gear includes an elastic magnetic composite material and an electromagnetic hub bracket, the elastic magnetic composite material constituting a first gear hub, and the electromagnetic hub bracket electrically supports the elastic magnetic composite material.

[0045] In some specific embodiments, the electromagnetic controller is also used to calculate the current or voltage required to adjust to the first gear hub radius feedback value based on the first gear hub radius feedback value, and adjust the current or voltage of the electromagnetic hub bracket according to the calculated current or voltage, thereby dynamically adjusting the supporting force of the electromagnetic hub bracket accordingly and adjusting the first gear hub radius to the first gear hub radius feedback value.

[0046] In some specific embodiments, in the energy release mode, Figure 3 As shown, the electromagnetic controller determines R1 according to R1×V1=R2×V2, and adjusts the radius of the first gear hub to R1, where R1 is the real-time feedback value of the radius of the first gear hub, V1 is the real-time speed of the first gear, R2 is the radius of the second gear hub, and V2 is the rated speed of the second gear. Specifically, in the energy release mode, the radius R2 of the driven gear (i.e., the second gear connected to the reversible motor rotor transmission shaft) and the rated speed of the second gear are input into the self-feedback speed regulator. The rated speed of the second gear is determined by the number of magnetic pole pairs and the frequency (i.e., 50Hz) inside the reversible motor. A speed monitoring device is installed on the driving gear (i.e., the first gear connected to the shaft of the clockwork device) to obtain the speed V1 of the driving gear in real time and feed it back to the electromagnetic controller. In the energy release mode, the first gear is the driving gear and the second gear is the driven gear.

[0047] The driving gear is made of a retractable magnetic composite material, and its hub radius is adjustable. The electromagnetic controller is equivalent to the hub radius control hub of the driving gear. The speed V1 of the driving gear and the speed V2 of the driven gear meet the following relationship:

[0048] R1×V1= R2×V2 Formula 1

[0049] That is, it is inversely proportional. Input V1, R2, and V2 into the electromagnetic controller, and R1 can be obtained through automatic calculation. Then, the electromagnetic controller dynamically adjusts the radius of the driving gear hub by calculating the current or voltage required to adjust the radius of the driving gear hub to the R1 value. When the current of the electromagnetic hub bracket changes, the electromagnetic force of the electromagnetic hub bracket changes, thereby changing the supporting force of the elastic hub, causing it to expand or shrink, thereby changing the radius of the first gear hub. The main gear hub is variable and can be changed through an electromagnetic device. The speed between the driving gear and the driven gear is constantly coordinated through the self-feedback speed regulator to achieve the constant establishment of formula 1, ensuring that the driven gear always maintains the speed corresponding to 50Hz, ensuring the stable output of electrical energy.

[0050] In some specific embodiments, the self-feedback speed regulator further includes a speed monitoring device for monitoring the real-time speed of the first gear and feeding back the speed to the electromagnetic controller.

[0051] In some specific embodiments, in the energy storage mode, the reversible motor is used to receive electrical energy, the reversible motor rotor drives the second gear to rotate, the second gear is the driving gear, the first gear is driven by the second gear, the first gear is the driven gear, and the second first gear drives the rotating shaft of the spring energy storage device to rotate, thereby increasing the elastic potential energy of the spring energy storage device.

[0052] In some specific embodiments, Figure 2 As shown, the reversible motor is electrically connected to the photovoltaic power generation system, household loads, and the public power grid respectively. In the charging stage, the electric energy generated by solar energy irradiating the rooftop photovoltaic power generation drives the reversible motor to rotate, and then drives the plane scroll spring inside the energy storage box group connected to the self-feedback speed regulator to contract. The whole process converts the electric energy into elastic potential energy and stores it; in the discharge stage, the plane scroll spring in the energy storage box group rotates in the opposite direction and drives the self-feedback speed regulator connected to it. The self-feedback speed regulator further drives the rotor inside the reversible motor to rotate in the opposite direction and cuts the magnetic lines of force, thereby generating electric energy for household use or transmission to the public power grid. In order to ensure that the energy storage system part in this technical solution can output stable electric energy and protect the reversible motor, this technical solution configures a self-feedback speed regulator in the energy storage box group to correct the elastic modulus of the nonlinear transformation of the plane scroll spring into a linear change, so as to maintain the stable output of electric energy.

[0053] The above method of this embodiment can avoid the potential safety hazards caused by lithium batteries, and has a longer life than lithium batteries, no capacity decay, can store energy for a long time, is more suitable for household use, and effectively solves the problem of difficulty in storing electricity in remote, isolated islands, and underdeveloped power grid areas.

[0054] Those skilled in the art can change the above sequence without departing from the protection scope of the present disclosure.

[0055] Another embodiment of the present invention provides a household energy storage method, the process of which is as follows: Figure 4 As shown, the following steps are included:

[0056] Step S1: connecting the spring energy storage device to the reversible motor through a self-feedback speed regulator, wherein the self-feedback speed regulator comprises a first gear, a second gear, an electromagnetic controller, and an elastic connecting belt; the first gear and the second gear are connected by an elastic connecting belt transmission, the first gear is connected to the rotating shaft of the spring energy storage device, and the second gear is connected to the rotor of the reversible motor;

[0057] Step S2: In the energy release mode, the electromagnetic controller determines the feedback value of the hub radius of the first gear according to the hub radius of the second gear, the rated speed and the real-time speed of the first gear, and dynamically adjusts the hub radius of the first gear according to the feedback value to keep the second gear at the rated speed.

[0058] Regarding the household energy storage method in the above embodiment, the specific implementation method has been described in detail in the embodiment of the household energy storage system, and will not be elaborated here.

[0059] The household energy storage method provided in this embodiment can avoid the safety hazards caused by lithium batteries, and has a longer life than lithium batteries, no capacity decay, can store energy for a long time, is more suitable for household use, and effectively solves the problem of difficult energy storage in remote areas, isolated islands, and underdeveloped power grids.

[0060] Another embodiment of the present invention provides a self-feedback speed regulator, the structure of which is as follows: Figure 5 As shown, it includes a first gear, a second gear, an electromagnetic controller, and an elastic connecting belt; the first gear and the second gear are connected by the elastic connecting belt transmission, the first gear is connected to the rotating shaft of the spring energy storage device, and the second gear is connected to the reversible motor rotor;

[0061] In the energy release mode of the spring energy storage device, the electromagnetic controller is used to determine the feedback value of the hub radius of the first gear based on the hub radius of the second gear, the rated speed and the real-time speed of the first gear, and dynamically adjust the hub radius of the first gear according to the feedback value to keep the second gear at the rated speed.

[0062] The self-feedback speed regulator provided in the embodiment of the present invention can correct the elastic modulus of the nonlinear transformation of the spring energy storage device into a linear change. When the spring shaft drives the reversible motor rotor, the reversible motor rotor can be kept at the rated speed, thereby keeping the frequency of the generated alternating current at the household power frequency, which is convenient for the use of household appliances.

[0063] Another embodiment of the present invention provides a self-feedback speed regulation method, the process of which is as follows: Figure 6 As shown, the following steps are included:

[0064] Step P1: The first gear and the second gear are connected through an elastic connecting belt transmission, the first gear is connected to the rotating shaft of the spring energy storage device, and the second gear is connected to the reversible motor rotor;

[0065] Step P2: In the energy release mode of the spring energy storage device, the electromagnetic controller determines the feedback value of the hub radius of the first gear according to the hub radius of the second gear, the rated speed and the real-time speed of the first gear, and dynamically adjusts the hub radius of the first gear according to the feedback value to keep the second gear at the rated speed.

[0066] The self-feedback speed regulation method provided by the embodiment of the present invention can correct the elastic modulus of the nonlinear transformation of the spring energy storage device into a linear change, and when the spring shaft drives the reversible motor rotor, the reversible motor rotor can be kept at the rated speed, thereby keeping the generated AC power frequency within the household power frequency, which is convenient for the use of household appliances. Any modifications, supplements and equivalent substitutions made within the scope of the principles of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A household energy storage system, characterized in that: It includes a reversible motor, a spring energy storage device and a self-feedback speed regulator; The spring energy storage device is connected to the reversible motor through a self-feedback speed regulator, and is used to perform energy conversion with the reversible motor, and store or release elastic potential energy; The self-feedback speed regulator comprises a first gear, a second gear, an electromagnetic controller, and an elastic connecting belt; the first gear and the second gear are connected by an elastic connecting belt transmission, the first gear is connected to the rotating shaft of the spring energy storage device, and the second gear is connected to the reversible motor rotor; In the energy release mode, the electromagnetic controller is used to determine the feedback value of the hub radius of the first gear based on the hub radius of the second gear, the rated speed and the real-time speed of the first gear, and dynamically adjust the hub radius of the first gear according to the feedback value to keep the second gear at the rated speed.

2. The household energy storage system according to claim 1, characterized in that: The first gear includes an elastic magnetic composite material and an electromagnetic hub bracket, wherein the elastic magnetic composite material constitutes a first gear hub, and the electromagnetic hub bracket electrically supports the elastic magnetic composite material.

3. The household energy storage system according to claim 2, characterized in that: The electromagnetic controller is also used to calculate the current or voltage required to adjust to the first gear hub radius feedback value based on the first gear hub radius feedback value, and dynamically adjust the supporting force of the electromagnetic hub bracket accordingly to adjust the first gear hub radius to the first gear hub radius feedback value.

4. The household energy storage system according to claim 1, characterized in that: In the energy release mode, the electromagnetic controller determines R1 according to R1×V1=R2×V2, and adjusts the radius of the first gear hub to R1, where R1 is the real-time feedback value of the radius of the first gear hub, V1 is the real-time speed of the first gear, R2 is the radius of the second gear hub, and V2 is the rated speed of the second gear.

5. The household energy storage system according to claim 1, characterized in that: The self-feedback speed regulator also includes a speed monitoring device for monitoring the real-time speed of the first gear and feeding back the speed to the electromagnetic controller.

6. The household energy storage system according to claim 1, characterized in that: In the energy storage mode, the reversible motor is used to receive electrical energy, the reversible motor rotor drives the second gear to rotate, the first gear is driven by the second gear, and the first gear drives the spring energy storage device rotating shaft to rotate, thereby increasing the elastic potential energy of the spring energy storage device.

7. The household energy storage system according to any one of claims 1 to 6, characterized in that: The reversible motor is electrically connected to the photovoltaic power generation system, the household load and the public power grid respectively.

8. A household energy storage method, characterized in that: The following steps are involved: The spring energy storage device is connected to the reversible motor through a self-feedback speed regulator, wherein the self-feedback speed regulator comprises a first gear, a second gear, an electromagnetic controller, and an elastic connecting belt; the first gear and the second gear are connected through an elastic connecting belt transmission, the first gear is connected to the rotating shaft of the spring energy storage device, and the second gear is connected to the rotor of the reversible motor; In the energy release mode, the electromagnetic controller determines the feedback value of the hub radius of the first gear based on the hub radius of the second gear, the rated speed and the real-time speed of the first gear, and dynamically adjusts the hub radius of the first gear according to the feedback value to keep the second gear at the rated speed.

9. A self-feedback speed regulator, characterized in that: It includes a first gear, a second gear, an electromagnetic controller, and an elastic connecting belt; the first gear and the second gear are connected by the elastic connecting belt, the first gear is connected to the rotating shaft of the spring energy storage device, and the second gear is connected to the reversible motor rotor; In the energy release mode of the spring energy storage device, the electromagnetic controller is used to determine the feedback value of the hub radius of the first gear based on the hub radius of the second gear, the rated speed and the real-time speed of the first gear, and dynamically adjust the hub radius of the first gear according to the feedback value to keep the second gear at the rated speed.

10. A self-feedback speed regulation method, characterized in that: The following steps are involved: The first gear and the second gear are connected through an elastic connecting belt transmission, the first gear is connected to the rotating shaft of the spring energy storage device, and the second gear is connected to the reversible motor rotor; In the energy release mode of the spring energy storage device, the electromagnetic controller determines the feedback value of the hub radius of the first gear based on the hub radius of the second gear, the rated speed and the real-time speed of the first gear, and dynamically adjusts the hub radius of the first gear according to the feedback value to keep the second gear at the rated speed.

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