CN113541394A - High-precision sine wave power supply integrating flywheel energy storage - Google Patents
High-precision sine wave power supply integrating flywheel energy storage Download PDFInfo
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- CN113541394A CN113541394A CN202110840831.XA CN202110840831A CN113541394A CN 113541394 A CN113541394 A CN 113541394A CN 202110840831 A CN202110840831 A CN 202110840831A CN 113541394 A CN113541394 A CN 113541394A
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- 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
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/007—Systems for storing electric energy involving storage in the form of mechanical energy, e.g. fly-wheels
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- 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
- H02K7/025—Additional mass for increasing inertia, e.g. flywheels for power storage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/13—Observer control, e.g. using Luenberger observers or Kalman filters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
- H02P21/18—Estimation of position or speed
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/24—Vector control not involving the use of rotor position or rotor speed sensors
- H02P21/28—Stator flux based control
- H02P21/30—Direct torque control [DTC] or field acceleration method [FAM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/28—Arrangements for controlling current
-
- 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
Abstract
The invention discloses a high-precision sine wave power supply integrating flywheel energy storage, which comprises a battery (101), a controller (102), a brushless direct current motor (103), an inertia flywheel (104), a sine wave permanent magnet generator (105) and a sine wave signal output interface (106), wherein the battery (101) is electrically connected with the controller (102), the controller (102) is electrically connected with the brushless direct current motor (103), the brushless direct current motor (103) and the inertia flywheel (104) are coaxial with the sine wave permanent magnet generator (105), and the sine wave permanent magnet generator (105) is electrically connected with the signal output interface (106). The invention can reduce the distortion of the output signal of the portable alternating current power supply under the load change; the current harmonics of the output signal of the portable ac power supply can be reduced.
Description
Technical Field
The invention belongs to the field of power supplies, and particularly relates to a high-precision alternating current power supply.
Background
At present, a portable ac power supply obtains a sine wave signal by chopping based on a dc power supply provided by an internal battery. However, the sinusoidal signal acquired in this manner has two problems. Firstly, the current limit of a battery and a switching device is limited, and signal distortion can occur when a signal load fluctuates greatly; secondly, signals obtained by a chopping mode have more current harmonics, and have adverse effects on loads.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to solve the problems of signal distortion and harmonic wave of a portable alternating-current power supply and provides a high-precision sine wave power supply integrating flywheel energy storage.
The technical scheme is as follows: in order to achieve the purpose, the invention adopts the following technical scheme:
a high-precision sine wave power supply integrated with flywheel energy storage comprises: the sine wave permanent magnet generator comprises a battery, a controller, a brushless direct current motor, an inertia flywheel, a sine wave permanent magnet generator and a sine wave signal output interface, wherein the battery is electrically connected with the controller, the controller is electrically connected with the brushless direct current motor, the brushless direct current motor and the inertia flywheel are coaxially connected with the sine wave permanent magnet generator, and the sine wave permanent magnet generator is electrically connected with the signal output interface.
The battery drives the brushless direct current motor to rotate at a fixed rotating speed through the controller, and simultaneously drives the inertia flywheel and the sine wave permanent magnet generator to rotate at the same rotating speed, and the sine wave permanent magnet generator outputs three-phase sine wave signals through the signal output interface.
When the signal output interface is connected with a load and has large fluctuation, the mechanical inertia of the brushless direct current motor, the inertia flywheel and the sine wave permanent magnet generator, the battery and the controller jointly provide electrical inertia, and the stability of sine signals is maintained.
The sine wave permanent magnet generator (105) adopts a built-in permanent magnet synchronous motor position-sensorless vector control strategy and/or a direct torque control strategy. The position of the rotor is estimated by combining a sliding mode observer and a high-frequency voltage signal injection method or combining one or two of the high-frequency signal injection method and a model reference self-adaption method, the motor is controlled by using a vector control method, and the rotor is pulled to rotate by using magnetic attraction according to the minimum magnetic resistance principle.
Has the advantages that: based on the design of coaxial connection of the brushless direct current motor, the inertia flywheel and the sine wave permanent magnet generator, the invention utilizes flywheel energy storage to inhibit mechanical fluctuation generated by electric load fluctuation and reduce distortion of output signals under load fluctuation; by utilizing the sine wave permanent magnet generator, the output sine wave signal is generated by cutting a magnetic field through a coil in the motor, and the current harmonic of the output signal of the portable alternating current power supply can be reduced.
Drawings
FIG. 1 is a block diagram of a high precision sine wave power supply according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a permanent magnet motor of a surface type rotor according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a permanent magnet motor with an embedded rotor according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a permanent magnet motor with an internal rotor according to an embodiment of the invention.
Detailed Description
The technical scheme of the invention is further clarified by the following specific embodiments in combination with the attached drawings.
The existing portable alternating current power supply obtains a sine wave signal through chopping based on a direct current power supply provided by an internal battery. However, the sinusoidal signal acquired in this manner has two problems. Firstly, the current limit of a battery and a switching device is limited, and signal distortion can occur when a signal load fluctuates greatly; secondly, signals obtained by a chopping mode have more current harmonics, and have adverse effects on loads.
In order to solve the problems of signal distortion and harmonic wave of a portable alternating current power supply, the invention provides a high-precision sine wave power supply integrating flywheel energy storage, and referring to fig. 1, the high-precision sine wave power supply provided by the invention comprises a battery 101, a controller 102, a brushless direct current motor 103, an inertia flywheel 104, a sine wave permanent magnet generator 105 and a sine wave signal output interface 106, wherein the battery 101 is electrically connected with the controller 102, the controller 102 is electrically connected with the brushless direct current motor 103, the brushless direct current motor 103 and the inertia flywheel 104 are coaxially connected with the sine wave permanent magnet generator 105, and the sine wave permanent magnet generator 105 is electrically connected with the signal output interface 106.
When the power supply device works, the battery 101 drives the brushless direct current motor 103 to rotate at a fixed rotating speed through the controller 102, meanwhile, the inertia flywheel 104 and the sine wave permanent magnet generator 105 are driven to rotate at the same rotating speed through the rigid shaft connection, the inertia flywheel 104 stores kinetic energy, and the sine wave permanent magnet generator 105 outputs a three-phase sine wave signal through the signal output interface 106.
When the signal output interface 106 is connected to a load and has large fluctuation, the electric load fluctuation is converted into mechanical fluctuation through the generator 105 and is transmitted to the brushless direct current motor 103 and the inertia flywheel 104 through a rigid shaft, the inertia flywheel 104 suppresses the mechanical fluctuation based on the rotational inertia of the inertia flywheel 104, and the brushless direct current motor 103 also suppresses the mechanical fluctuation under the control of the controller 102 and the electric quantity supply of the battery 101, and the mechanical inertia of the brushless direct current motor 103, the inertia flywheel 104 and the sine wave permanent magnet generator 105 and the electric inertia of the battery 101 and the controller 102 provide together, so that the stability of the sine signal output by the generator 106 is maintained.
The permanent magnet synchronous motor is generally classified into a sine wave permanent magnet synchronous motor powered by sine wave current, which is called PMSM for short, and a brushless direct current motor powered by square wave current, which is called BLDCM for short. The former has more stable torque, smoother control characteristic and larger power density. The permanent magnet synchronous motor utilizes a high-performance permanent magnet material to provide excitation, the size of the permanent magnet synchronous motor can be smaller under given power, and the permanent magnet synchronous motor is more suitable for a portable power supply. The rotor has the advantages of no excitation winding, no rotor copper consumption and high efficiency, and meanwhile, the rotor has small rotational inertia and good dynamic performance. In the power supply device provided by the invention, the characteristic of high power density of the brushless direct current motor 103 is utilized, the inertia flywheel 104 and the sine wave permanent magnet generator 105 are driven to synchronously rotate through the rotation of the brushless direct current motor 103, and the sine wave signal output by the sine wave permanent magnet generator 105 is generated by cutting a magnetic field through a coil in the motor, so that compared with the sine wave obtained in a chopping mode, the current harmonic wave is extremely small.
In the invention, a stator winding of the sine wave permanent magnet synchronous motor adopts three-phase symmetrical sine distribution windings, or a rotor adopts a permanent magnet with a special shape to ensure that the air gap flux density is in sine distribution along the space. Thus, when the motor operates at a constant speed, the potential induced by the three-phase winding of the stator is a sine wave, and the name of the sine wave permanent magnet synchronous motor is obtained. Referring to fig. 2 to 4, the rotor structure has three basic forms of surface type, embedded type and built-in type. Fig. 2 shows a surface type rotor structure, in which a) the permanent magnet is tile-shaped and directly adhered to the surface of the rotor core through epoxy resin, and b) the permanent magnet is an integral ring. Fig. 3 shows an embedded rotor structure, in which permanent magnets are embedded in slots in the surface of the rotor core. Fig. 4 shows a built-in rotor structure, where a) is permanent magnet radial magnetization, and b) is permanent magnet transverse magnetization. In order to generate sine wave induced electromotive force, the air gap flux density should be distributed as sine as possible during installation. For example, in the surface structure shown in fig. 2, the rotor magnetic steel surface is parabolic, a parallel magnetizing mode is adopted, and the stator uses a short-distance distributed winding or a sinusoidal winding to maximally inhibit the influence of a magnetic field on the induced electromotive force waveform.
A typical sine wave permanent magnet synchronous motor is an electromechanical integrated motor, and includes not only the motor itself, but also a position sensor, a power electronic converter, a driving circuit, and the like. The position sensor has a rotary transformer, a photoelectric encoder, and the like, and is used for obtaining position information of the rotor. The use of these position sensors increases cost and reduces system reliability. Therefore, an interior permanent magnet synchronous motor position sensorless (IPMSM) vector control system has become a hot spot and a focus of research in recent years. According to the using speed range, the control method of the existing built-in permanent magnet synchronous motor without the position sensor can comprise the following steps: the method is suitable for a control method of low-speed operation, such as a high-frequency injection method, a tooth socket harmonic method and the like; the method is suitable for control methods of medium and high speed operation, such as a model reference adaptive method, a sliding mode observer method and the like. For example, in one implementation of the present invention, the control strategy of the sine wave permanent magnet synchronous motor 103 is to combine the sliding mode observer and the high-frequency voltage signal injection method, smoothly start and operate in the position-sensorless IPMSM closed-loop vector control mode, and obtain more accurate observation information of the rotor position in low-speed and high-speed operation situations. According to another implementation, the rotor position may also be estimated by combining a high frequency signal injection method with a model-referenced adaptive method. After the position of the rotor is estimated by the method, the motor is controlled by a vector control method, according to the principle of minimum magnetic resistance, namely, magnetic flux is always closed along a path with minimum magnetic resistance, the rotor is pulled to rotate by magnetic attraction, so that the permanent magnet rotor can synchronously rotate along with a rotating magnetic field generated by the stator, and the reliable operation in a wide rotating speed range can be realized.
Another control strategy for the sine wave permanent magnet synchronous motor 103 is direct torque control, which is implemented by calculating the torque and the stator flux linkage of the motor by using a mathematical model of the motor torque and the flux linkage through the detected current value of the stator voltage. The control strategy takes the motor and the converter as a whole and controls under a static two-phase coordinate system, so that the relief of coordinate rotation transformation is omitted, the control system has a simple structure, and the dynamic response speed of the system is improved. In a direct torque control system, hysteresis control is carried out according to errors of the torque and flux linkage values obtained through calculation and a given value, and a proper voltage space vector and action time thereof are selected. However, the voltage of the motor terminal is low at low speed, so that the error of the stator flux linkage model is increased, and the speed regulation range is not wide enough. The invention combines two control strategies of the sine wave permanent magnet synchronous motor 103, realizes the algorithm of the two control strategies to be written into the controller, and is provided with the adjusting button, so that the corresponding control mode can be selected according to the actual requirement, and the application flexibility of the portable power supply is improved.
The brushless dc motor 103 in the power supply apparatus of the present invention eliminates the brushes and mechanical commutator of a brushed dc motor in which the dc motor is reversed, i.e., the permanent magnet poles are placed on the rotor and the armature winding becomes the stationary stator winding. In order to enable the current direction in the stator winding to be changed along with the polarity of a magnetic field at the position of the coil side of the stator winding, the stator winding is connected with an inverter formed by power electronic devices, a rotor position detector is installed to detect the space position of a rotor magnetic pole, and the on-off of a power switch device in the inverter is controlled according to the control position of the rotor magnetic pole, so that the conduction condition of an armature winding and the direction of winding current are controlled. The number of phases in the brushless DC motor increases, which causes the number of power switching devices of the inverter to increase, the circuit to be more complex and the cost to increase. As the control technology of the brushless dc motor is mature, PWM modulation is still the most common means for adjusting the rotation speed and current.
The inertia flywheel 104 in the invention utilizes the principle of flywheel energy storage, and the flywheel energy storage refers to an energy storage mode that a motor is utilized to drive a flywheel to rotate at a high speed, and the flywheel is utilized to drive a generator to generate electricity when needed. The technology is characterized by high power density and long service life. The flywheel body is a core component in a flywheel energy storage system, and has the functions of improving the limit angular speed of the rotor, reducing the weight of the rotor and increasing the energy storage capacity of the flywheel energy storage system to the maximum extent. The flywheel energy storage system is an energy storage device for converting mechanical energy and electrical energy, and energy storage is realized by a physical method. Through the electric/power generation reciprocal type bidirectional motor, the electric energy and the mechanical kinetic energy of the high-speed running flywheel are mutually converted and stored, and the energy is connected with different types of load interfaces through frequency modulation, rectification and constant voltage.
When the inertia flywheel 104 stores energy, electric energy is converted through the power converter and then drives the brushless direct current motor 103 to operate, the brushless direct current motor 103 drives the inertia flywheel 104 to rotate in an accelerating manner, the inertia flywheel 104 stores the energy in a kinetic energy manner, the energy storage process of converting the electric energy into mechanical energy is completed, and the energy is stored in a flywheel body rotating at a high speed; thereafter, the brushless dc motor 103 maintains a constant rotation speed until receiving a control signal for energy release; when releasing energy, the inertia flywheel 104 rotating at high speed drags the motor to generate power, and current and voltage suitable for a load are output through the power converter, so that the process of energy release from mechanical energy to electric energy conversion is completed. The whole flywheel energy storage system realizes the processes of inputting, storing and outputting electric energy.
The flywheel is a pure mechanical motion when rotating, and the kinetic energy of the flywheel when rotating is as follows: E-1/2J ω/2, wherein: j is the moment of inertia of the flywheel and ω is the angular velocity of the flywheel rotation.
In the embodiment of the invention, the battery 101 adopts a 3.7V-10Ah lithium battery pack; the controller 102 selects a brushless direct current motor controller with rated driving current of 10A; correspondingly, the brushless direct current motor 103 is a brushless direct current motor with the rated rotating speed of 3000RPM and the rated current of 10A; inertia flywheel 104 selects a flywheel with rotational inertia of 10gm2, and sine wave permanent magnet motor 105 selects a sine wave permanent magnet synchronous motor with rated rotation speed of 3000RPM and rated current of 30A.
According to the invention, through the design that the brushless direct current motor 103, the inertia flywheel 104 and the sine wave permanent magnet generator 105 are coaxially connected, mechanical fluctuation generated by electric load fluctuation is inhibited by utilizing flywheel energy storage, and distortion of an output signal under load variation is reduced; by using the sine wave permanent magnet generator, the current harmonic of the output signal of the portable alternating current power supply can be reduced.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention.
Claims (6)
1. A high-precision sine wave power supply integrating flywheel energy storage is characterized by comprising: the intelligent control system comprises a battery (101), a controller (102), a brushless direct current motor (103), an inertia flywheel (104), a sine wave permanent magnet generator (105) and a sine wave signal output interface (106), wherein the battery (101) is electrically connected with the controller (102), the controller (102) is electrically connected with the brushless direct current motor (103), the brushless direct current motor (103) and the inertia flywheel (104) are coaxially connected with the sine wave permanent magnet generator (105), and the sine wave permanent magnet generator (105) is electrically connected with the signal output interface (106).
2. The flywheel energy storage integrated high-precision sine wave power supply according to claim 1, wherein a battery (101) drives a brushless DC motor (103) to rotate at a fixed rotation speed through a controller (102), and simultaneously drives an inertia flywheel (104) and a sine wave permanent magnet generator (105) to rotate at the same rotation speed, and the sine wave permanent magnet generator (105) outputs a three-phase sine wave signal through a signal output interface (106).
3. The flywheel energy storage integrated high-precision sine wave power supply according to claim 1, wherein when a signal output interface (106) is connected to a load and fluctuates greatly, the mechanical inertia of the brushless direct current motor (103), the inertia flywheel (104) and the sine wave permanent magnet generator (105) and the battery (101) and the controller (102) provide electrical inertia together, and the sine signal is maintained to be stable.
4. The integrated flywheel energy storage high-precision sine wave power supply of claim 1, wherein the sine wave permanent magnet generator (105) employs an interior permanent magnet synchronous motor position sensorless vector control strategy and/or a direct torque control strategy.
5. The integrated flywheel energy storage high precision sine wave power supply of claim 4, wherein said built-in PMSM position sensorless vector control strategy comprises: the position of the rotor is estimated by combining a sliding mode observer and a high-frequency voltage signal injection method or combining one or two of the high-frequency signal injection method and a model reference self-adaption method, the motor is controlled by using a vector control method, and the rotor is pulled to rotate by using magnetic attraction according to the minimum magnetic resistance principle.
6. The integrated flywheel energy storage high-precision sine wave power supply according to claim 1, wherein the battery (101) is a 3.7V-10Ah lithium battery pack; the controller (102) selects a brushless direct current motor controller with rated driving current of 10A; correspondingly, the brushless direct current motor (103) is a brushless direct current motor with the rated rotating speed of 3000RPM and the rated current of 10A; the inertia flywheel (104) selects a flywheel with rotational inertia of 10gm2, and the sine wave permanent magnet motor (105) selects a sine wave permanent magnet synchronous motor with rated rotating speed of 3000RPM and rated current of 30A.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110840831.XA CN113541394A (en) | 2021-07-23 | 2021-07-23 | High-precision sine wave power supply integrating flywheel energy storage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110840831.XA CN113541394A (en) | 2021-07-23 | 2021-07-23 | High-precision sine wave power supply integrating flywheel energy storage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841201A (en) * | 2010-05-18 | 2010-09-22 | 浙江工业大学 | Coaxial type flywheel battery |
| CN105024525A (en) * | 2014-04-28 | 2015-11-04 | 田洪波 | Electric power generating set |
| CN105763023A (en) * | 2014-12-16 | 2016-07-13 | 韦福华 | Hydraulic inertia driving generator |
| CN106314164A (en) * | 2015-06-30 | 2017-01-11 | 刘本荣 | Self-electricity-generation and self-charging switching type pure-electric car with storage batteries |
| CN108768074A (en) * | 2018-08-01 | 2018-11-06 | 广西罗城宏宇新能源电力投资有限公司 | A kind of free wheels electrical power conversion generating equipment |
-
2021
- 2021-07-23 CN CN202110840831.XA patent/CN113541394A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841201A (en) * | 2010-05-18 | 2010-09-22 | 浙江工业大学 | Coaxial type flywheel battery |
| CN105024525A (en) * | 2014-04-28 | 2015-11-04 | 田洪波 | Electric power generating set |
| CN105763023A (en) * | 2014-12-16 | 2016-07-13 | 韦福华 | Hydraulic inertia driving generator |
| CN106314164A (en) * | 2015-06-30 | 2017-01-11 | 刘本荣 | Self-electricity-generation and self-charging switching type pure-electric car with storage batteries |
| CN108768074A (en) * | 2018-08-01 | 2018-11-06 | 广西罗城宏宇新能源电力投资有限公司 | A kind of free wheels electrical power conversion generating equipment |
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Application publication date: 20211022 |