CN216721106U - Flywheel energy storage system with permanent magnet transmission - Google Patents
Flywheel energy storage system with permanent magnet transmission Download PDFInfo
- Publication number
- CN216721106U CN216721106U CN202122808916.8U CN202122808916U CN216721106U CN 216721106 U CN216721106 U CN 216721106U CN 202122808916 U CN202122808916 U CN 202122808916U CN 216721106 U CN216721106 U CN 216721106U
- Authority
- CN
- China
- Prior art keywords
- rotor
- permanent magnet
- transmission
- flywheel
- energy storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/02—Additional mass for increasing inertia, e.g. flywheels
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model provides a flywheel energy storage system with a permanent magnet transmission. The motor is connected with the flywheel rotor to drive the flywheel rotor to rotate. The permanent magnet speed changer comprises a permanent magnet rotor and a conductor rotor which are coaxially arranged, the permanent magnet rotor and the conductor rotor are opposite in the axial direction and form an air gap, the flywheel rotor is in transmission connection with one of the permanent magnet rotor and the conductor rotor to drive the other to rotate, and the permanent magnet speed changer further comprises a displacement device which is used for adjusting the size of the air gap so that the rotating speed of the other can be kept constant, and the other is in transmission connection with the input end of the generator to drive the generator to stably generate power and output constant-frequency electric energy.
Description
Technical Field
The utility model relates to the technical field of energy storage, in particular to a flywheel energy storage system with a permanent magnet transmission.
Background
With the development of a new round of energy revolution mainly based on clean energy, the proportion of new energy in the power grid in China is higher and higher. However, in the new energy technology, a power electronic device is mostly connected to a power grid, and the power electronic device has no rotational inertia, and cannot actively provide necessary voltage and frequency support for the power grid, nor provide necessary damping action. Especially as the penetration of distributed energy sources connected to the grid via power electronics is higher and higher, the total moment of inertia of the grid is decreasing and thus the risk of large frequency deviations of the grid when heavy loads or sudden changes of the power supply occur is increasing. The access of high-proportion power electronic devices can cause the power grid to be in a low inertia level for a long time, and unbalanced power impact of the system is increased, so that greater and greater pressure is brought to safe and stable operation of the power system. In order to improve and relieve the operating pressure of a power grid and the consumption pressure of new energy, an energy storage system with a certain capability of supporting dynamic adjustment of the power grid is urgently needed to improve the capability of the power grid for efficiently receiving the new energy.
SUMMERY OF THE UTILITY MODEL
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
flywheel energy storage is an energy storage technology that stores energy in the form of kinetic energy, and the energy storage/release is realized by accelerating/decelerating a rotor by a motor/generator. The main advantages of flywheel energy storage are fast climbing capability, high energy conversion efficiency, long service life and the like, and the flywheel energy storage has the unique advantages in providing auxiliary services such as inertia and frequency adjustment. And the flywheel has no geographical restriction, can easily install, has the advantage that can promote and can large-scale the duplication.
Currently, the existing flywheel energy storage technology uses a power electronic device to assist a motor/generator to perform a process of mutual conversion between kinetic energy and electric energy. When the system needs to store electric energy, the system supplies alternating current transmitted from the outside to the motor in an AC/DC mode so as to drive the flywheel rotor to rotate and store energy; when discharging is needed, the power electronic device decouples the rotor inertia of the flywheel rotor, and plays roles of rectification, frequency modulation and voltage stabilization so as to meet the power consumption requirement of the load. However, the power electronic device does not have rotational inertia and is difficult to participate in power grid inertia response, so that the flywheel energy storage technology cannot solve the problem that the total rotational inertia proportion is continuously reduced due to large-scale use of the power electronic device in the current power grid.
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the utility model provides a flywheel energy storage system with a permanent magnet transmission.
The flywheel energy storage system with the permanent magnet transmission comprises the following components: the motor is connected with the flywheel rotor to drive the flywheel rotor to rotate; the permanent magnet transmission comprises a permanent magnet rotor and a conductor rotor which are oppositely arranged in a first direction, an air gap is formed between the permanent magnet rotor and the conductor rotor in the first direction, the flywheel rotor is in transmission connection with one of the permanent magnet rotor and the conductor rotor to drive the other to rotate, and the permanent magnet transmission further comprises a displacement device which is used for adjusting the size of the air gap so that the rotating speed of the other can be kept constant; and the other one of the two generators is in transmission connection with the input end of the generator so as to drive the generator to stably generate power and output constant-frequency electric energy.
According to the flywheel energy storage system provided by the embodiment of the utility model, the flywheel rotor is connected with the permanent magnet transmission with the speed change function, and the output rotating speed of the permanent magnet transmission can be kept unchanged, so that the generator can be driven to generate constant-frequency current, and the requirement of power transmission to a power grid is met. Because the permanent magnet speed changer has a speed change function, the change of the rotating speed of the flywheel rotor does not influence the constant frequency current input into the power grid by the generator, so that the flywheel energy storage system provided by the embodiment of the utility model is connected with the power grid, the decoupling, rectification, frequency modulation and voltage stabilization of a power electronic device are not needed, the problem that the total rotational inertia is continuously reduced due to the use of the power electronic device in the current power grid is solved, the rotational inertia in the power grid can be improved, the necessary voltage and frequency support is provided for the power grid, the risk of large frequency deviation of the power grid is reduced, the power system can safely and stably operate, and the capability of the power grid for efficiently accepting new energy is improved.
In some embodiments, the permanent magnet rotor is coaxial with the conductor rotor, and the displacement device is connected to at least one of the permanent magnet rotor and the conductor rotor for adjusting a relative position between the permanent magnet rotor and the conductor rotor in an axial direction of the permanent magnet rotor to adjust the air gap size.
In some embodiments, the flywheel rotor is in driving connection with the permanent magnet rotor, and the displacement device is connected with the conductor rotor to adjust the relative position between the conductor rotor and the permanent magnet rotor along the axial direction.
In some embodiments, the flywheel rotor is in driving connection with the conductor rotor, and the displacement device is connected with the permanent magnet rotor to adjust the relative position between the permanent magnet rotor and the flywheel rotor along the axial direction.
In some embodiments, the generator is a synchronous generator.
In some embodiments, the electric motor is connected to an electric grid and used for taking electricity from the electric grid, the flywheel energy storage system has an energy release state and an energy storage state, in the energy release state, the electric motor is in a standby state, the flywheel rotor releases kinetic energy to drive the generator to generate electricity, the generator inputs electric energy with stable frequency into the electric grid, in the energy storage state, the electric motor takes electricity from the electric grid to drive the flywheel rotor to rotate, and the generator idles.
In some embodiments, the flywheel energy storage system is provided with a standby state in which the electric motor is on standby and the generator is idling.
In some embodiments, the flywheel energy storage system further comprises a speed change device, the flywheel rotor is in driving connection with an input end of the speed change device, and an output end of the speed change device is in driving connection with the one of the permanent magnet rotor and the conductor rotor.
In some embodiments, the transmission is a transmission with a fixed transmission ratio, or alternatively, the transmission is a transmission with an adjustable transmission ratio.
In some embodiments, the transmission is a gear transmission, a torque converter, or a magnetic force transformer.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
FIG. 1 is a schematic diagram of a flywheel energy storage system according to a first embodiment of the utility model
Fig. 2 is a schematic diagram of a flywheel energy storage system according to a second embodiment of the utility model.
Fig. 3 is a schematic diagram of a flywheel energy storage system according to a third embodiment of the utility model.
FIG. 4 is a schematic diagram of a flywheel energy storage controller according to an embodiment of the utility model.
Reference numerals:
the energy storage system comprises a flywheel energy storage system 1, a motor 10, a flywheel rotor 20, a permanent magnet transmission 30, a permanent magnet rotor 31, a conductor rotor 32, a displacement device 33, a generator 40, a fixed gear ratio speed change device 51, a gear ratio adjustable device 52, a first transmission shaft 61, a second transmission shaft 62 and a third transmission shaft 63.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
The basic structure of the flywheel energy storage system 1 according to an embodiment of the utility model is described below with reference to fig. 1-4. As shown in fig. 1, the flywheel energy storage system 1 includes an electric motor 10, a flywheel rotor 20, a permanent magnet transmission 30, and a generator 40.
Acceleration of the flywheel rotor 20 enables storage of energy and deceleration of the flywheel rotor 20 enables release of energy. Wherein the flywheel rotor 20 is connected to an electric motor 10, and the electric motor 10 is used for driving the flywheel rotor 20 to rotate. The electric motor 10 accelerates by driving the flywheel rotor 20, and finally realizes that electric energy is stored in the form of kinetic energy in the flywheel energy storage unit. Alternatively, the motor 10 is connected to a power grid for taking power from the grid, the motor 10 taking power from the grid drives the flywheel rotor 20 to rotate, and the rotation speed of the flywheel rotor 20 is increased to store kinetic energy.
The permanent magnet transmission 30 comprises a permanent magnet rotor 31, a conductor rotor 32 and a displacement device 33, wherein the permanent magnet rotor 31 and the conductor rotor 32 are coaxially arranged, and in the axial direction, the permanent magnet rotor 31 and the conductor rotor 32 are opposite and form an air gap at intervals. The permanent magnet rotor 31 comprises permanent magnets, it being understood that a magnetic field is formed in the air gap due to the magnetic properties of the permanent magnets. The permanent magnet rotor 31 and the conductor rotor 32 can each rotate independently with their respective rotation shafts. When the permanent magnet rotor 31 and the conductor rotor 32 move relatively, the magnetic lines of force move in the conductor to generate induced eddy current, and further generate an induced magnetic field on the conductor, so that torque is generated, and one of the active rotations can drive the other one to rotate.
The flywheel rotor 20 is in transmission connection with a driving rotor, and the ratio of the rotating speed of the driving rotor to the rotating speed of the driven rotor is the transmission ratio of the permanent magnet transmission 30. In some embodiments, the flywheel rotor 20 is in driving connection with the permanent magnet rotor 31 and can drive the permanent magnet rotor 31 to rotate, and the permanent magnet rotor 31 drives the conductor rotor 32 to rotate, in this embodiment, the permanent magnet rotor 31 is a driving rotor, and the conductor rotor 32 is a driven rotor. In other embodiments, the flywheel rotor 20 is drivingly connected to the conductor rotor 32 and can drive the conductor rotor 32 to rotate, and the conductor rotor 32 drives the permanent magnet rotor 31 to rotate, in which case the conductor rotor 32 is a driving rotor and the permanent magnet rotor 31 is a driven rotor.
The displacement means 33 are used to adjust the size of the air gap so that the rotational speed of the driven rotor remains constant. Optionally, a displacement device 33 is connected to at least one of the permanent magnet rotor 31 and the conductor rotor 32 for adjusting the relative position between the permanent magnet rotor 31 and the conductor rotor 32 in the axial direction to adjust the size of the air gap. The rotating speed of the driven rotor can be kept constant by adjusting the size of the air gap to adjust the size of the induced magnetic field generated by the conductor rotor 32, thereby adjusting the transmitted torque.
For example, the displacement device 33 is connected to the conductor rotor 32 and is configured to move the conductor rotor 32 in the axial direction, if the displacement device 33 moves the conductor rotor 32 in the axial direction toward the permanent magnet rotor 31, the air gap is reduced, the denser the magnetic lines of force passing through the conductor rotor 32 are, the stronger the induced magnetic field is, the larger the torque is, the faster the relative motion is, and the transmission ratio of the permanent magnet transmission 30 is reduced.
When the driving rotor rotates at a higher speed under the driving of the flywheel rotor 20, the displacement device 33 should increase the air gap and the transmission ratio of the permanent magnet transmission 30 in order to keep the rotation speed of the driven rotor constant. When the driving rotor is driven by the flywheel rotor 20 to rotate at a reduced speed, the displacement device 33 should reduce the air gap and the transmission ratio of the permanent magnet transmission 30 in order to keep the rotation speed of the driven rotor constant. The permanent magnet transmission 30 can be regarded as a variable ratio transmission device.
The driven rotor is in transmission connection with the input end of the generator 40, and the generator 40 generates power to be connected into a power grid and inputs electric energy with stable frequency into the power grid because the rotating speed of the driven rotor can be kept constant. That is, the generator 40 is able to input a constant frequency current to the grid through the action of the permanent magnet transmission 30. The generator 40 stably inputs electric power to the grid without being affected by the change in the rotational speed of the flywheel rotor 20, and even if the rotational speed of the flywheel rotor 20 changes, the generator 40 can stably input electric power to the grid.
Alternatively, the driven rotor may rotate at 3000rpm, and the generator 40 may be capable of stably supplying a current with a frequency of 50Hz to the grid.
Optionally, the flywheel energy storage system 1 may be connected to the grid to participate in the grid inertia response, and store the overflowed energy in the flywheel rotor 20 in an overflowed proportion or draw energy from the flywheel rotor 20 in a missing proportion to supplement the grid, so as to reduce the grid frequency fluctuation.
According to the flywheel energy storage system provided by the embodiment of the utility model, the flywheel rotor is connected with the permanent magnet transmission with the speed change function, and the output rotating speed of the permanent magnet transmission can be kept unchanged, so that the generator can be driven to generate constant-frequency current, and the requirement of power transmission to a power grid is met. Because the permanent magnet speed changer has a speed change function, the change of the rotating speed of the flywheel rotor does not influence the constant frequency current input into the power grid by the generator, so that the flywheel energy storage system provided by the embodiment of the utility model is connected with the power grid, the decoupling, rectification, frequency modulation and voltage stabilization of a power electronic device are not needed, the problem that the total rotational inertia is continuously reduced due to the use of the power electronic device in the current power grid is solved, the rotational inertia in the power grid can be improved, the necessary voltage and frequency support is provided for the power grid, the risk of large frequency deviation of the power grid is reduced, the power system can safely and stably operate, and the capability of the power grid for efficiently accepting new energy is improved.
In order to make the generator 40 output stable current better, in some embodiments, the flywheel energy storage system 1 further includes a speed changing device connected between the flywheel rotor 20 and the permanent magnet transmission 30, the speed changing device has an input end and an output end, the flywheel rotor 20 is in transmission connection with the input end of the speed changing device, the output end of the speed changing device is in transmission connection with the permanent magnet rotor 31 of the permanent magnet transmission 30, and the speed changing device is used for changing speed. The speed changing device is also used for transmitting the rotational inertia of the flywheel rotor.
That is, the speed change device is used to adjust the rotational speed of the flywheel rotor 20 input to the permanent magnet transmission 30, and the speed change ratio of the speed change device is the ratio of the input end (rotational speed of the flywheel rotor 20) to the output end (rotational speed of the driving rotor). The output rotation speed of the flywheel rotor 20 can be better adapted to the rotation speed application range of the permanent magnet transmission 30 by the speed change device, and the load of the permanent magnet transmission 30 is reduced, that is, the output rotation speed of the flywheel rotor 20 can be changed to the ideal interval of the input rotation speed of the permanent magnet transmission 30 (the mechanical rotation speed of the driving rotor) by the speed change device.
For example, the desired range of the input rotation speed of the permanent magnet transmission 30 is (3000 ± 1000) rpm, and when the input rotation speed of the permanent magnet transmission 30 is in the range of (3000 ± 1000) rpm, the permanent magnet transmission 30 can respond better to the rotation speed variation of the driving rotor. By providing a transmission having an appropriate gear ratio, the output rotational speed of the flywheel rotor 20 can be changed to be within the desired range of the input rotational speed of the permanent magnet transmission 30.
Alternatively, the transmission is a transmission having a fixed gear ratio (fixed gear ratio transmission 51), or a transmission having an adjustable gear ratio (variable gear ratio transmission 52). The transmission is a transmission with adjustable transmission ratio, which means that the transmission can be a multi-stage transmission or a stepless transmission. The transmission is a multi-stage transmission having a plurality of gear ratios, and the gear ratio thereof is adjustable according to the rotation speed of the flywheel rotor 20. The transmission is a continuously variable transmission that can continuously adjust its gear ratio within a certain range.
Several embodiments provided by the present invention are described below with reference to fig. 1-4 as examples.
The first embodiment is as follows:
as shown in fig. 1, the flywheel energy storage system 1 of the present embodiment includes an electric motor 10, a flywheel rotor 20, a permanent magnet transmission 30, a generator 40, a first transmission shaft 61, and a second transmission shaft 62. The permanent magnet transmission 30 includes a permanent magnet rotor 31, a conductor rotor 32, and a displacement device 33. The motor 10 is connected to the flywheel rotor 20, and the motor 10 can drive the flywheel rotor 20 to rotate at a higher speed through the transmission shaft to store kinetic energy. The flywheel rotor 20 can drive the driving rotor of the permanent magnet transmission 30 to rotate through the transmission shaft. The driving rotor drives the driven rotor to rotate at a constant speed.
In the present embodiment, the permanent magnet rotor 31 is an input end of the permanent magnet transmission 30, and the conductor rotor 32 is in transmission connection with an input end of the generator 40. That is, in the present embodiment, the permanent magnet rotor 31 is a driving rotor, and the conductor rotor 32 is a driven rotor. The permanent magnet rotor 31 is separated from the conductor rotor 32 by an air gap.
The motor 10 is located on one side of the flywheel rotor 20 far away from the permanent magnet transmission 30, the first transmission shaft 61 penetrates through the flywheel rotor 20 and is in transmission connection with the flywheel rotor 20, one end of the first transmission shaft 61 is in transmission connection with the output end of the motor 10, and the other end of the first transmission shaft 61 is connected with the permanent magnet rotor 31. One end of the second transmission shaft 62 is in transmission connection with the conductor rotor 32, and the other end of the second transmission shaft 62 is in transmission connection with the input end of the generator 40. The conductor rotor 32 rotates to drive the generator 40 to generate electricity, and the generator 40 is connected to the power grid through a transformer (not shown) to supply power to the power grid. In the present embodiment, the generator 40 is a synchronous generator.
When the permanent magnet rotor 31 rotates under the action of the flywheel rotor 20, that is, when the permanent magnet rotor 31 and the conductor rotor 32 generate relative motion, the conductor rotor 32 cuts magnetic lines of force to generate eddy current, the eddy current further generates an induced magnetic field, the induced magnetic field interacts with the magnetic field of the permanent magnet, and has a tendency of preventing the relative motion between the permanent magnet rotor 31 and the conductor rotor 32, and drives the conductor rotor 32 to rotate in the same direction as the permanent magnet rotor 31, so that torque transmission, that is, transmission of rotational inertia, from the permanent magnet rotor 31 to the conductor rotor 32 is realized. The magnitude of the rotational speed of the conductor rotor 32 is related to the rotational speed of the permanent magnet rotor 31 and the magnitude of the gas.
As shown in fig. 1, a displacement device 33 is connected to the conductor rotor 32 for moving the conductor rotor 32 in an axial direction so as to change a relative position between the conductor rotor 32 and the permanent magnet rotor 31, and thus change a size of an air gap therebetween. The smaller the air gap between the two, the greater the magnetic field strength passing through the conductor rotor 32, the greater the torque transmitted and the faster the rotational speed of the conductor rotor 32. Conversely, the larger the air gap, the lower the magnetic field strength passing through the conductor rotor 32, the lower the torque transmitted, and the slower the rotational speed of the conductor rotor 32.
Therefore, by adjusting the relative positional relationship between the conductor rotor 32 and the permanent magnet rotor 31 in the axial direction by the displacement device 33, it is possible to achieve smooth and controllable adjustment of the torque transmission relationship therebetween, that is, adjustment of the magnitude of the transmission ratio of the permanent magnet transmission 30 (the ratio of the rotational speeds of the permanent magnet rotor 31 and the conductor rotor 32).
It will be appreciated by those skilled in the art that the rotational speed of the flywheel rotor 20 is constantly changing, resulting in an intermittent change in the mechanical rotational speed of the permanent magnet rotor 31. To make the rotational speed of the conductor rotor 32 constant:
when the rotation speed of the flywheel rotor 20 rises, the rotation speed of the permanent magnet rotor 31 is driven to rise, and the displacement device 33 is controlled to move the conductor rotor 32 to the direction far away from the permanent magnet rotor 32 so as to increase the air gap, so that the transmission ratio of the permanent magnet transmission 30 is increased;
when the rotation speed of the flywheel rotor 20 is reduced, the rotation speed of the permanent magnet rotor 31 is reduced, and the displacement device 33 is controlled to move the conductor rotor 32 to a direction close to the permanent magnet rotor 32 so as to reduce the air gap, thereby reducing the transmission ratio of the permanent magnet transmission 30. By the above control strategy, the conductor rotor 32 can drive the generator 40 to generate power at a constant frequency while the rotation speed of the conductor rotor 32 is kept constant.
That is, in order to keep the rotational speed of the conductor rotor 32 constant, a preset value is set thereto, and the relative position between the two is adjusted according to the current rotational speed of the permanent magnet rotor 31. The displacement device 33 may be any device capable of implementing a displacement function in the prior art, for example, the displacement device 33 includes a telescopic rod, an air cylinder, an electric actuator, and the like. And will not be described more than here.
In the present embodiment, the rotational speed of the permanent magnet rotor 31 is equal to the output rotational speed of the flywheel rotor 20, and the rotational speed of the conductor rotor 32 is equal to the input rotational speed of the generator 40. The mechanical speed of the conductor rotor 32 was constant at 3000 rpm. The output frequency of the generator 40 is stabilized at 50 Hz.
It should be noted that the national grid frequency reference line is 50Hz, and the rotation speed of the conductor rotor 32 may be constant at 3000 rpm. The foreign power grid frequency reference line is 60Hz, the rotating speed of the conductor rotor 32 can be kept constant at 3600rpm, namely, the rated rotating speed of the conductor rotor 32 can be adjusted according to the frequency reference of the power grid.
In other embodiments, the flywheel rotor 20 may be in driving connection with the conductor rotor 32 to drive the conductor rotor 32 to rotate, that is, the conductor rotor 32 may be a driving rotor, and the permanent magnet rotor 31 may be a driven rotor. The flywheel rotor 20 drives the conductor rotor 32, the conductor rotor 32 cuts magnetic lines of force to generate eddy current, the induced magnetic field interacts with the permanent magnetic field to generate torque, and the permanent magnetic rotor 31 is driven to rotate along the same direction as the conductor rotor 32.
Furthermore, in other embodiments, the displacement device 33 may also be connected to the permanent magnet rotor 31 for moving the permanent magnet rotor 31 in the axial direction to change the air gap size. Alternatively, the displacement device 33 may be connected to each of the conductor rotor 32 and the permanent magnet rotor 31, and the conductor rotor 32 and the permanent magnet rotor 31 may be moved simultaneously to change the air gap size.
Further, the flywheel energy storage system 1 provided by the embodiment of the present application has an energy storage state and an energy release state, and can be switched between the energy storage state and the energy release state. It can also be said that the flywheel energy storage system 1 includes an energy storage stage and an energy release stage in the operation process, the energy storage stage corresponds to the above energy storage state, and the energy release stage corresponds to the above energy release state. When the flywheel energy storage system 1 is in an energy storage state, converting electric energy into kinetic energy for storage; when the flywheel energy storage system 1 is in the energy release state, the kinetic energy stored by the flywheel energy storage system is released, and the kinetic energy is converted into electric energy to be output.
The following describes the technical solution of the present application by taking an example that the motor 10 is connected to a power grid and can take power from the power grid, and the generator 40 can transmit power to the power grid, specifically as follows:
in the energy storage state, the motor 10 is operated to take power from the power grid or other power source and drive the flywheel rotor 20 to rotate through the transmission shaft, the rotation speed of the flywheel rotor 20 is increased to realize energy storage, and in the state, the generator 40 idles to stop inputting electric energy into the power grid. That is, during the energy storage phase, no power is transferred between the generator 40 and the grid, and the generator 40 does not generate electricity.
Alternatively, the flywheel rotor 20 is driven by the motor 10 to increase the rotation speed to the rated maximum rotation speed, and when the rated maximum rotation speed is reached, the flywheel rotor 20 completes energy storage, and then the motor 10 stops driving the flywheel rotor 20. Optionally, the rated maximum speed is 100rpm to 1000000 rpm.
In the energy release state, the motor 10 is in standby, the flywheel rotor 20 releases kinetic energy, the flywheel rotor 20 drives the permanent magnet rotor 31 to rotate through the first transmission shaft 61, the conductor rotor 32 rotates and drives the generator 40 to generate electricity through the second transmission shaft 62, the generator 40 inputs electric energy with stable frequency into the power grid through a transformer, decoupling, rectification, frequency modulation and voltage stabilization of a power electronic device are not needed, the rotational inertia in the power grid is improved, necessary voltage and frequency support is provided for the power grid, the risk of large frequency deviation of the power grid is reduced, the power system can operate safely and stably, and the capacity of the power grid for efficiently accepting new energy is improved. The flywheel rotor 20 releases kinetic energy and the rotational speed decreases.
Wherein the standby state of the motor 10 in the energy release state means that the motor 10 is not operated and does not drive the flywheel rotor 20 to accelerate. That is, when the flywheel energy storage system 1 is in the energy release state, only energy is output and no energy is input in the flywheel energy storage system 1. When the flywheel energy storage system 1 is in the above energy storage state, only energy is input into the flywheel energy storage system 1, and no energy is output.
In the energy release state, the displacement device 33 is controlled to change the size of the air gap according to the difference between the rotation speed of the flywheel rotor 20 (the rotation speed of the permanent magnet rotor 31) and the predetermined rotation speed of the conductor rotor 32, so that the conductor rotor 32 rotates at the predetermined rotation speed, and the generator 40 generates a stable current.
In some embodiments, the flywheel energy storage system 1 is also provided with a standby state. It can also be said that the flywheel energy storage system 1 also includes a standby phase during operation. When the flywheel energy storage system 1 is in a standby state, the flywheel energy storage system 1 is in an energy holding stage, that is, there is no energy input nor energy output, and the flywheel energy storage system 1 operates with minimum loss. In the standby state, the motor 10 is in standby, the generator 40 is idling, and the flywheel rotor 20 releases a small amount of kinetic energy to keep the permanent magnet rotor 31 rotating.
For example, when the frequency in the power grid is equal to a preset value (for example, the power grid frequency is equal to 50Hz), the flywheel energy storage system 1 is put into a standby state, and the flywheel rotor 20 loses a small amount of kinetic energy to maintain the rotation of the permanent magnet rotor 31, so as to ensure that the flywheel energy storage system 1 corresponds to the next power grid frequency fluctuation in an optimal state.
In some embodiments, the flywheel energy storage system 1 being connected to the grid enables inertia response or frequency modulation of the grid. When the frequency of the power grid rises, the electric motor 10 draws the overflowed electric energy from the power grid to drive the flywheel rotor 20 to rotate at a rising speed, so that the electric energy is converted into kinetic energy to be stored in the flywheel rotor 20, and the frequency of the power grid is reduced. When the frequency of the power grid is reduced, the flywheel rotor 20 drives the generator 40 to generate electricity, the rotating speed of the flywheel rotor 20 is reduced, kinetic energy is converted into electric energy to be input into the power grid, and therefore the frequency of the power grid is improved.
In some embodiments, as shown in fig. 4, the flywheel energy storage system 1 further comprises a flywheel energy storage controller. The flywheel energy storage controller is used for controlling energy input and input power of the flywheel energy storage unit 10, that is, the flywheel energy storage controller is used for controlling whether to input electric energy into the flywheel energy storage unit 10 or not, and is also used for controlling power of the electric energy input into the flywheel energy storage unit 10. Optionally, the flywheel energy storage controller is powered by an independent power supply to ensure that it is not affected by fluctuations in the external power grid.
The flywheel energy storage controller comprises a power grid detection module and a motor control module. The power grid detection module is used for detecting the current frequency of the power grid. Optionally, the power grid detection module can monitor the frequency of the power grid in real time, so as to better respond to and regulate the frequency of the power grid.
The motor control module is in communication connection with the power grid detection module, the power grid detection module transmits the detected frequency of the power grid to the motor control module, and the motor control module receives the frequency signal and controls the starting and stopping of the motor 10 and the input power of the motor 10 according to the frequency signal.
That is, when the motor control module receives the current frequency signal of the power grid and determines that the motor 10 needs to be started to store energy in the flywheel energy storage unit 10, the motor control module sends a start signal to the motor 10, so that the motor 10 is started and absorbs electric energy from the power grid.
And when the motor control module judges that energy does not need to be stored in the flywheel energy storage unit 10 according to the current frequency of the power grid, starting a closing signal to the motor 10 to close the motor 10.
The motor control module may determine the input power of the motor 10 according to the current frequency of the grid, and control the input power to the motor 10.
For example, when the current frequency of the grid rises to be greater than the preset value, the motor control module judges to change the input power of the motor 10 to adjust the frequency of the grid, so as to inhibit the further increase of the grid frequency. By varying the input power of the electric motor 10, the flywheel energy storage unit 10 can be made to absorb more electric energy, and the rotational speed of the flywheel rotor 20 is increased. And the larger the frequency deviation of the grid, the larger the moment of the flywheel rotor 20, i.e. the larger the input power of the electric motor 10. It will be appreciated that the input power to the motor 10 does not exceed the maximum power that it can withstand.
Therefore, the flywheel energy storage system 1 provided by the embodiment of the application can realize auxiliary services such as disturbance power distribution, inertia response and primary frequency modulation of a power grid, and the primary frequency modulation and inertia supporting capacity of a power system are improved. Compared with the traditional mechanical inertia, the flywheel energy storage system 1 provided by the embodiment of the application can provide faster and more stable frequency control.
Example two:
the flywheel energy storage system 1 of the present embodiment is described below by taking fig. 2 as an example, and the flywheel energy storage system 1 of the present embodiment includes an electric motor 10, a flywheel rotor 20, a permanent magnet transmission 30, a generator 40, a fixed-speed-ratio transmission device 51, a first transmission shaft 61, a second transmission shaft 62, and a third transmission shaft 63. The flywheel rotor 20, the motor 10 and the permanent magnet transmission 30 are similar to those of the embodiment, and are not described herein, and only the differences will be described.
As shown in fig. 2, the first transmission shaft 31 passes through the flywheel rotor 20 and is in transmission connection with the flywheel rotor 20, one end of the first transmission shaft 31 is in transmission connection with the output end of the electric motor 10, and the other end of the first transmission shaft 31 is in transmission connection with the input end of the constant speed ratio transmission device 51. One end of the secondary transmission shaft 32 is drivingly connected to the output of the constant transmission ratio transmission 51, and the other end is connected to the permanent magnet rotor 31. The third drive shaft 63 is connected at one end to the conductor rotor 32 and at the other end to the input section of the generator 40. The speed ratio of the constant speed ratio transmission 51 is fixed as a ratio of the input rotation speed to the output rotation speed.
In this embodiment, the flywheel rotor 20 rotates at a speed equal to the speed of the input of the fixed-ratio transmission 51, and the speed of the output of the fixed-ratio transmission 51 is equal to the speed of the permanent magnet rotor 31.
In the energy storage phase, the stator of the generator is disconnected from the power grid, the generator 40 idles, the motor 10 draws electric energy from the power grid, the output end of the motor 10 drives the rotation speed of the flywheel rotor 20 to rise through the first transmission shaft 31, and the rise of the rotation speed of the flywheel rotor 20 stores kinetic energy, that is, the electric energy is converted into kinetic energy to be stored in the flywheel rotor 20. The rotational speed of the flywheel rotor 20 rises until the set rotational speed is reached. It can be understood that the flywheel energy storage system 1 has only energy input and no energy output during the energy storage phase.
In the energy release stage, the electric motor 10 is in a standby state, i.e. the electric motor 10 does not input energy to the flywheel rotor 20, the flywheel rotor 20 releases kinetic energy, the flywheel rotor 20 drives the input end of the fixed-speed-ratio transmission device 51 to rotate through the first transmission shaft 31, the moment of inertia is output from the output end of the fixed-speed-ratio transmission device 51, the rotating speed of the output end of the fixed-speed-ratio transmission device 51 is related to the rotating speed of the input end of the fixed-speed-ratio transmission device 51 and the speed ratio of the fixed-speed-ratio transmission device 51, the output end of the fixed-speed-ratio transmission device 51 drives the permanent magnet rotor 31 to rotate through the second transmission shaft 32, the permanent magnet rotor 31 drives the conductor rotor 32 to rotate, and the conductor rotor 32 drives the generator 40 to generate electricity through the third transmission shaft 62.
The arrangement of the speed change device 51 with a fixed speed ratio between the flywheel rotor 20 and the permanent magnet transmission 30 can make the rotation speed of the generator rotor better adapt to the application range of the rotation speed of the permanent magnet transmission 30, and reduce the burden of the permanent magnet transmission 30, namely, the arrangement of the speed change device can make the output rotation speed of the flywheel rotor 20 change to the ideal interval of the input rotation speed of the permanent magnet transmission 30 (the rotation speed of the permanent magnet rotor 31).
Alternatively, the desired range of the input rotation speed of the permanent magnet transmission 30 is (3000 ± 1000) rpm, and by providing a transmission device having an appropriate gear ratio, the output rotation speed of the flywheel rotor 20 can be changed to be within the desired range of the input rotation speed of the permanent magnet transmission 30. When the input rotational speed of the permanent magnet transmission 30 (the rotational speed of the generator rotor) is in the range of (3000 ± 1000) rpm, the permanent magnet transmission 30 can respond better to the mechanical rotational speed variation of the permanent magnet rotor 31 to keep the rotational speed of the conductor rotor 32 constant.
Alternatively, the ratio of the fixed ratio transmission 51 is 0.03 to 333.
Alternatively, the constant speed ratio transmission device 51 is a gear transmission having a speed change function, a torque converter, a magnetic force transformer, or a magnetic coupling transmission device.
Example three:
the flywheel energy storage system 1 of the present embodiment is described below by taking fig. 3 as an example, and the flywheel energy storage system 1 of the present embodiment includes an electric motor 10, a flywheel rotor 20, a permanent magnet transmission 30, a generator 40, a variable speed ratio device 52, a first transmission shaft 61, a second transmission shaft 62, and a third transmission shaft 63. The flywheel rotor 20, the motor 10 and the permanent magnet transmission 30 are similar to those of the embodiment, and are not described herein, and only the differences will be described.
As shown in fig. 3, the first transmission shaft 31 passes through the flywheel rotor 20 and is in transmission connection with the flywheel rotor 20, one end of the first transmission shaft 31 is in transmission connection with the output end of the electric motor 10, and the other end of the first transmission shaft 31 is in transmission connection with the input end of the variable transmission ratio device 52. One end of the second transmission shaft 32 is in transmission connection with the output end of the variable transmission ratio device 52, and the other end is connected with the permanent magnet rotor 31. The third drive shaft 63 is connected at one end to the conductor rotor 32 and at the other end to the input section of the generator 40. The transmission ratio of the variable transmission 52 is variable, and the transmission ratio of the variable transmission 52 is the ratio of the input rotational speed to the output rotational speed.
Alternatively, the variable transmission 52 may be a multi-stage transmission, i.e. the variable transmission 52 has a plurality of transmission ratios and is switchable according to the rotation speed of the flywheel rotor 20. Alternatively, the variable transmission ratio device 52 may be a continuously variable transmission, i.e., the variable transmission ratio device 52 may continuously adjust its transmission ratio within a certain range.
Alternatively, the variable gear ratio device 52 is a gear transmission, a torque converter, a magnetic force variator, or a magnetic coupling transmission device having a multi-stage or continuously variable transmission function.
By arranging the variable gear ratio device 52 between the flywheel rotor 20 and the permanent magnet transmission 30 and adaptively adjusting the gear ratio of the variable gear ratio device 52 according to the current rotation speed of the flywheel rotor 20, the output rotation speed of the flywheel rotor 20 can be better converted into an ideal interval of the input rotation speed of the permanent magnet transmission 30, the adjustment burden of the permanent magnet transmission 30 is further reduced, the applicability of the permanent magnet transmission 30 is improved, and the rotation speed interval of the flywheel rotor 20 can be expanded.
When the rotation speed of the flywheel rotor 20 rises, the gear ratio of the variable gear ratio device 52 can be increased, and when the rotation speed of the flywheel rotor 20 falls, the gear ratio of the variable gear ratio device 52 can be decreased, so that the output end of the variable gear ratio device 52 is kept within an ideal interval of the input rotation speed of the permanent magnet transmission 30, the permanent magnet transmission 30 responds better to regulation, and the output rotation speed is stable.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A flywheel energy storage system having a permanent magnet transmission, comprising:
the motor is connected with the flywheel rotor to drive the flywheel rotor to rotate;
the permanent magnet transmission comprises a permanent magnet rotor and a conductor rotor which are oppositely arranged in a first direction, an air gap is formed between the permanent magnet rotor and the conductor rotor in the first direction, the flywheel rotor is in transmission connection with one of the permanent magnet rotor and the conductor rotor to drive the other to rotate, and the permanent magnet transmission also comprises a displacement device which is used for adjusting the size of the air gap so that the rotating speed of the other can be kept constant; and
and the other generator is in transmission connection with the input end of the generator so as to drive the generator to stably generate power and output constant-frequency electric energy.
2. The flywheel energy storage system with a permanent magnet transmission of claim 1, wherein the permanent magnet rotor is coaxial with the conductor rotor, and the displacement device is connected to at least one of the permanent magnet rotor and the conductor rotor for adjusting a relative position between the permanent magnet rotor and the conductor rotor in an axial direction of the permanent magnet rotor to adjust the air gap size.
3. The flywheel energy storage system with a permanent magnet transmission of claim 2, wherein the flywheel rotor is in driving connection with the permanent magnet rotor, and the displacement device is connected with the conductor rotor to adjust the relative position between the conductor rotor and the permanent magnet rotor in the axial direction.
4. The flywheel energy storage system with a permanent magnet transmission of claim 2, wherein the flywheel rotor is in driving connection with the conductor rotor, and the displacement device is connected with the permanent magnet rotor to adjust the relative position between the permanent magnet rotor and the flywheel rotor along the axial direction.
5. The flywheel energy storage system with a permanent magnet transmission of claim 1, wherein the generator is a synchronous generator.
6. The flywheel energy storage system with a permanent magnet transmission according to any of claims 1-5, characterized in that the electric motor is connected to the grid and is used to take electricity from the grid or other power source, the flywheel energy storage system having a release state and an energy storage state,
in the energy release state, the motor is in a standby state, the flywheel rotor releases kinetic energy to drive the generator to generate electricity, the generator inputs electric energy with stable frequency into a power grid,
in the energy storage state, the motor takes power from a power grid to drive the flywheel rotor to rotate, and the generator idles.
7. The flywheel energy storage system with a permanent magnet transmission of claim 6, wherein the flywheel energy storage system has a standby state in which the motor is on standby and the generator is idling.
8. The flywheel energy storage system with a permanent magnet transmission of claim 1, further comprising a transmission, the flywheel rotor being in driving connection with an input of the transmission, an output of the transmission being in driving connection with the one of the permanent magnet rotor and the conductor rotor.
9. The flywheel energy storage system with a permanent magnet transmission according to claim 8, wherein the transmission is a transmission with a fixed transmission ratio, or the transmission is a transmission with an adjustable transmission ratio.
10. The flywheel energy storage system with a permanent magnet transmission of claim 9, wherein the transmission is a gear transmission, a torque converter, or a magnetic force transformer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122808916.8U CN216721106U (en) | 2021-11-16 | 2021-11-16 | Flywheel energy storage system with permanent magnet transmission |
| PCT/CN2022/132340 WO2023088323A1 (en) | 2021-11-16 | 2022-11-16 | Flywheel energy storage system having permanent magnet transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122808916.8U CN216721106U (en) | 2021-11-16 | 2021-11-16 | Flywheel energy storage system with permanent magnet transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216721106U true CN216721106U (en) | 2022-06-10 |
Family
ID=81880130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122808916.8U Active CN216721106U (en) | 2021-11-16 | 2021-11-16 | Flywheel energy storage system with permanent magnet transmission |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN216721106U (en) |
| WO (1) | WO2023088323A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115159316A (en) * | 2022-06-22 | 2022-10-11 | 常熟理工学院 | Elevator energy-saving device and method with bidirectional buffering function |
| WO2023088323A1 (en) * | 2021-11-16 | 2023-05-25 | 国家电投集团科学技术研究院有限公司 | Flywheel energy storage system having permanent magnet transmission |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1539669A (en) * | 2003-04-23 | 2004-10-27 | 沈裕祥 | Permanent magnet automatic gear shifting of automobile |
| CN101725476A (en) * | 2008-10-28 | 2010-06-09 | 马杰 | Variable speed constant frequency permanent magnetic speed-adjusting wind power generator |
| JP2016084708A (en) * | 2014-10-23 | 2016-05-19 | 日本精工株式会社 | Energy storage device and wind power generator |
| CN113489230B (en) * | 2021-07-13 | 2022-11-18 | 坎德拉(深圳)新能源科技有限公司 | Novel frequency modulation system based on flywheel energy storage technology |
| CN114257026A (en) * | 2021-11-16 | 2022-03-29 | 国家电投集团科学技术研究院有限公司 | Flywheel energy storage system with permanent magnet transmission |
| CN216721106U (en) * | 2021-11-16 | 2022-06-10 | 国家电投集团科学技术研究院有限公司 | Flywheel energy storage system with permanent magnet transmission |
-
2021
- 2021-11-16 CN CN202122808916.8U patent/CN216721106U/en active Active
-
2022
- 2022-11-16 WO PCT/CN2022/132340 patent/WO2023088323A1/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023088323A1 (en) * | 2021-11-16 | 2023-05-25 | 国家电投集团科学技术研究院有限公司 | Flywheel energy storage system having permanent magnet transmission |
| CN115159316A (en) * | 2022-06-22 | 2022-10-11 | 常熟理工学院 | Elevator energy-saving device and method with bidirectional buffering function |
| CN115159316B (en) * | 2022-06-22 | 2023-11-28 | 常熟理工学院 | Elevator energy-saving device and method with bidirectional buffer function |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023088323A1 (en) | 2023-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216721106U (en) | Flywheel energy storage system with permanent magnet transmission | |
| CN114257026A (en) | Flywheel energy storage system with permanent magnet transmission | |
| CN114257031A (en) | Flywheel energy storage system with asynchronous speed regulator | |
| CN114257027B (en) | Flywheel energy storage system with double-fed speed change device | |
| CN114257029B (en) | Flywheel energy storage system with double-fed speed change device | |
| WO2023005951A1 (en) | Flywheel energy storage and inertia conduction system | |
| CN216721105U (en) | Flywheel energy storage system with asynchronous speed regulator | |
| CN215934637U (en) | Flywheel energy storage and inertia conduction system | |
| CN216016619U (en) | Flywheel energy storage system for asynchronous power generation | |
| WO2023005950A1 (en) | Flywheel energy storage system | |
| CN114257028B (en) | Flywheel energy storage system with electromagnetic coupler | |
| CN114257030A (en) | Flywheel energy storage system with electromagnetic coupler | |
| CN216121814U (en) | Flywheel energy storage and inertia conduction system with gear transmission speed change device | |
| CN217590268U (en) | Flywheel phase modulation system | |
| CN215934636U (en) | Vertical flywheel energy storage and inertia conduction system | |
| CN216078188U (en) | Flywheel energy storage and inertia conduction system with hydraulic torque converter | |
| CN215934638U (en) | Vertical flywheel energy storage and inertia conduction system | |
| CN115693966A (en) | Flywheel energy storage system with double-fed asynchronous generator | |
| CN215682042U (en) | Vertical flywheel energy storage and inertia conduction system | |
| CN215682043U (en) | Horizontal flywheel energy storage and inertia conduction system | |
| CN116937608A (en) | Flywheel phase modulation system with double-fed double-rotor transmission | |
| CN116937609A (en) | Flywheel phase modulation system with electromagnetic coupler | |
| CN115693967A (en) | Flywheel energy storage and inertia conduction system with magnetorheological fluid device | |
| CN115693964A (en) | Control method of flywheel energy storage and inertia conduction system | |
| CN115694051A (en) | Vertical flywheel energy storage and inertia conduction system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |