Flywheel power generation system

Abstract

To select a first or second motor or a fuel engine with different torque as a power source that drives the flywheel to generate electricity depending on the power supply status of the first power storage battery and regular maintenance needs, and improve the operating efficiency of each motor unit while maintaining a stable output of generated power.SOLUTION: A flywheel power generation system includes a first power storage battery 11, a first motor unit 20, a second motor unit 30, an engine unit 40, a transmission module 50, a flywheel 60 and a generator 70, and one of the first motor unit, the second motor unit and the engine unit is connected to the transmission module as necessary to transmit power thereto, the transmission module drives the flywheel, and the flywheel drives and operates the generator to generate electricity, which is then supplied.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a power generation system, and more particularly to a flywheel power generation system.

Background Art

[0002] The importance of a power generation system with stable power supply lies in ensuring continuous and reliable power supply. The power generation system needs to balance supply and demand to ensure a stable power output, and this is also very important for responding to emergencies. If the power supply is unstable, the system will face problems such as voltage fluctuations and unstable frequencies, which may further affect the normal operation of the connected power transmission network and other power facilities. A stable power supply contributes to maintaining the stability of the system, improving the reliability and safety of the power transmission network, promoting the application of clean energy, improving energy efficiency, reducing carbon emissions, and realizing natural energy and sustainable development. Therefore, ensuring a stable power supply is an important consideration in the design and operation of power generation systems and directly affects people's lives and economic development.

Summary of the Invention

Problems to be Solved by the Invention

[0003] An object of the present invention is to provide a flywheel power generation system that improves and advances the prior art.

[0004] Another object of the present invention is to enable the entire system to select an appropriate power source according to the current power supply situation or regular maintenance needs by inputting one of a plurality of connected power sources into the transmission module, thereby providing a flywheel power generation system that maintains a stable power supply and power output.

[0005] Another object of the present invention is that when different power sources are selected, for example, when generating electricity by inputting the torque of a low-torque motor or a high-torque motor into a transmission module, the system can not only maintain a stable output of kinetic energy, but also avoid unnecessary energy consumption by satisfying low-load needs with low torque and high-load needs with high torque, and provide a flywheel power generation system.

[0006] Another object of the present invention is to provide a flywheel power generation system that can utilize a fuel engine unit as standby power and continue to operate independently from the power grid to drive the flywheel to continue generating electricity when the first power storage battery cannot supply power.

[0007] Another object of the present invention is to provide a flywheel power generation system that can maintain the same power as a low-speed flywheel even when the volume and mass of the flywheel are reduced by using a high-speed flywheel, and can reduce the power required to drive the flywheel, and has excellent electromechanical conversion efficiency.

[0008] Another object of the present invention is to provide a flywheel power generation system that does not significantly affect the power output of the generator when driving the generator after the rotational speed of the flywheel has decelerated.

Means for Solving the Problems

[0009] To achieve the above and other objects, the present invention provides a flywheel power generation system, comprising a first power storage battery, a first motor unit electrically connected to the first power storage battery, a second motor unit electrically connected to the first power storage battery, an engine unit electrically connected to the first power storage battery, and a transmission module having three rotational power input terminals and one rotational power output terminal, wherein these rotational power input terminals include a first input terminal, a second input terminal, and a third input terminal, the first input terminal is connected to the torque output shaft of the first motor unit by a first clutch, the second input terminal is connected to the torque output shaft of the second motor unit by a second clutch, the third input terminal is connected to the torque output shaft of the engine unit by a third clutch, a flywheel connected to the output terminal by a one-way bearing, having an output ring shaft and capable of being rotated by the drive of the rotational power output terminal, and a generator power-connected to the output ring shaft.

[0010] In one embodiment, the first motor unit has a first maximum torque and a first maximum rotational speed, the second motor unit has a second maximum torque and a second maximum rotational speed, the second maximum torque is smaller than the first maximum torque, and the second maximum rotational speed is greater than the first maximum rotational speed.

[0011] In one embodiment, the system further comprises a second power storage battery electrically connected to the first power storage battery, the engine unit, the first clutch, the second clutch, and the third clutch, so that the first power storage battery receives power and supplies power to the engine unit, the first clutch, the second clutch, and the third clutch.

[0012] In one embodiment, the second power storage battery has a voltage lower than that of the first power storage battery, the first power storage battery is connected to the second power storage battery after being stepped down through a first power converter, and the second power storage battery is connected to the first clutch, the second clutch, and the third clutch after being stepped down through a second power converter.

[0013] In one embodiment, the power generator further includes a voltage stabilization unit that is electrically connected to the power generator to stabilize the voltage of the power generated by the power generator and then output the voltage.

[0014] In one embodiment, the power generator further includes a speed reducer that inputs rotational power by being connected to the output axle and drives the power generator by being power-connected to the power generator.

[0015] In one embodiment, the engine unit has a fuel tank and can operate with fuel.

[0016] In one embodiment, the engine unit, the third clutch, the transmission module, and the one-way bearing are respectively connected by shaft joints.

[0017] The flywheel power generation system of the present invention includes a first power storage battery, a first motor unit, a second motor unit, an engine unit, a transmission module, a flywheel, and a power generator. One of the first motor unit, the second motor unit, and the engine unit is connected to the transmission module as needed to transmit power thereto, and the transmission module drives the flywheel, and the flywheel drives the power generator to operate to generate power and then supply power. Thereby, according to the power supply situation and regular maintenance needs of the first power storage battery, a first or second motor or a fuel engine with different torques is selected as a power source for driving the flywheel to generate power, and the operating efficiency of each motor unit can be improved while maintaining the stable output of the generated power.

Effects of the Invention

[0018] Since the flywheel of the present invention drives the generator after deceleration, it does not significantly affect the power output of the generator. Since the power of the engine unit does not pass through the first motor unit or the second motor unit, frictional losses can be reduced. The present invention uses a high-speed flywheel, and due to the relationship that the kinetic energy stored in the flywheel is directly proportional to the square of the rotational speed, the volume and mass of the flywheel can be reduced, and after improving the operating efficiency of the motor, the same power output of a low-speed flywheel can be achieved at a relatively low cost (volume / mass). Since the power of the engine unit of the present invention does not pass through the first motor unit or the second motor unit, a motor having a single output shaft may be used, and the use of an electromagnetic clutch is reduced, and the cost is relatively low.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Embodiments for Carrying Out the Invention

[0020] In order to make the above and other objects, functions, and features clearer and easier to understand, some preferred embodiments will be specifically cited below and described in detail with reference to the accompanying drawings. Without departing from the spirit of the invention, the present application has many embodiments and is not limited to the details specifically described in the following embodiments. The drawings are not necessarily drawn to actual scale and are only provided for the purpose of explaining the embodiments.

[0021] FIG. 1 is a system block diagram of a flywheel power generation system according to an embodiment of the present invention. Referring to FIG. 1, the flywheel power generation system of this embodiment includes a first power storage battery 11, a first motor unit 20, a second motor unit 30, an engine unit 40, a transmission module 50, a flywheel 60, a speed reducer 65, and a generator 70. The first power storage battery 11 is a power storage device capable of storing light energy 111, commercial power 112, or other types of natural energy (for example, renewable energy, solar energy, wind energy). When the first power storage battery 11 is connected to the first motor unit 20, the second motor unit 30, and the engine unit 40, it supplies power.

[0022] Preferably, the maximum torque of the first motor unit 20 is greater than the maximum torque of the second motor unit 30, and the maximum rotational speed of the first motor unit 20 is less than the maximum rotational speed of the second motor unit 30.

[0023] The transmission module 50 has three rotational power input terminals 500 and one rotational power output terminal 53. These rotational power input terminals include a first input terminal 51a, a second input terminal 51b, and a third input terminal 51c. The first input terminal 51a is connected to the torque output shaft of the first motor unit 20 by a first clutch 52a, the second input terminal 51b is connected to the torque output shaft of the second motor unit 30 by a second clutch 52b, and the third input terminal 51c is connected to the torque transmission shaft of the engine unit 40 by a third clutch 52c. The first motor unit 20, the second motor unit 30, and the engine unit 40 are respectively connected. By separating and coupling the first clutch 52a, the second clutch 52b, and the third clutch 52c, one of the connected power sources, namely the first motor unit 20, the second motor unit 30, or the engine unit 40, can be input into the transmission module 50, and rotational power can be output through the rotational power output terminal (53).

[0024] The power output by the transmission module 50 is transmitted to a flywheel 60 supported by a pair of bearing blocks 61 via a one-way bearing 54. The flywheel 60 may be directly connected to the generator 70 to generate electricity, or the rotational speed of the rotational torque (shaft) may be reduced by a speed reducer 65 and then the rotational torque may be input to the generator 70. The generator 70 can input rotational power and convert it into electric power.

[0025] FIG. 2 is a system block diagram of a flywheel power generation system according to another embodiment of the present invention. Referring to FIG. 2, the flywheel power generation system of this embodiment further includes a second power storage battery 12 that is electrically connected to the first power storage battery 11, the engine unit 40, the first clutch 52a, the second clutch 52b, and the third clutch 52c in the above embodiment, receives power from the first power storage battery 11, and supplies power to the engine unit 40, the first clutch 52a, the second clutch 52b, and the third clutch 52c.

[0026] Preferably, the voltage of the first power storage battery 11 is greater than the voltage of the second power storage battery 12. For example, the first power storage battery 11 can receive and store power such as commercial power and green power, and the second power storage battery 12 supplies power to low-voltage devices such as the engine unit 40, the first clutch 52a, the second clutch 52b, and the third clutch 52c.

[0027] Naturally, since the voltage of the second power storage battery 12 is lower than the voltage of the first power storage battery 11, the first power storage battery 11 is connected to the second power storage battery 12 after being stepped down via a first power converter 13, and the second power storage battery 12 is connected to the first clutch 52a, the second clutch 52b, and the third clutch 52c after being stepped down via a second power converter 14 to supply power. For example, the second power storage battery 12 may be electrically connected to the engine unit 40 as an electric start.

[0028] Also, the first clutch 52a, the second clutch 52b, and the third clutch 52c may be electromagnetic clutches. The first clutch 52a and the second clutch 52b are respectively powered by the second power converter 14, while the third clutch 52c is powered by the second power storage battery 12, thereby contributing to electrically controlling the separation or engagement operation of each clutch.

[0029] The engine unit 40 may be electrically connected to the second power storage battery 12, and the operation of the engine unit 40 is started by the power of the low-voltage second power storage battery 12. Naturally, depending on the electric starting needs of the adopted engine unit 40, in the case of a high-voltage standard, the engine unit 40 needs to obtain operating power by being electrically connected to the first power storage battery 11.

[0030] The flywheel 60 may be a high-speed flywheel, which is connected by the one-way bearing 54 and driven by the rotational power output terminal 53 of the transmission module 50. The flywheel 60 has an output wheel shaft 62. When the output wheel shaft 62 is power-connected to the generator 70, the torque force of the output wheel shaft 62 is converted into electric power and then transmitted to the voltage stabilization unit 80, so that the electric power generated by the generator 70 is voltage-stabilized and then output. Thereby, it is possible to avoid the surges in the output of the generator 70 from causing harm to the power-consuming side device.

[0031] Note that due to the relationship that the voltage of the power output is directly proportional to the rotational speed, before the flywheel 60 is connected to the generator 70, the output rotational speed of the flywheel 60 is reduced by a speed reducer 65 passed through, and then it is connected to the generator 70. In this way, it has the advantage that when the rotational speed of the flywheel 60 is reduced, it does not affect the power output of the generator 70 much.

[0032] Preferably, in addition to being capable of electric starting, the engine unit 40 has a fuel tank and is operable by fuel. Thus, when the first power storage battery 11 cannot supply power, the engine unit 40 powered by fuel can supply power to maintain the power generation output.

[0033] Preferably, the shaft coupling by which the engine unit 40 is connected to the third clutch 52c, or the shaft coupling by which the transmission module 50 is connected to the one-way bearing 54 may be a corrugated shaft coupling, a magnetic shaft coupling, or a shaft coupling with similar functions. Mainly by utilizing its characteristics, the rattling and instantaneous current value of the power output of each motor or engine can be reduced, and the effect of starting slowly can be realized.

[0034] Preferably, when the present invention is initially started, since the flywheel 60 needs to start from a stationary state, a first motor unit 20 with relatively high torque is selected and connected to the first clutch 52a. Thus, the transmission module 50 may be driven to generate power by the flywheel 60, and it is easy to drive the flywheel 60 to reach a stable rotational speed. After the rotational speed of the flywheel 60 is stabilized, the corresponding second clutch 52b is started, and the second motor unit 30 is connected to the transmission module 50 to generate power by the flywheel 60. At the same time, the first clutch 52a may be released. Of course, when it is necessary to regularly inspect and repair to maintain the operation of the engine unit 40, the first clutch 52a and the second clutch 52b may be released and the third clutch 52c may be operated to connect to the engine unit 40 to drive the transmission module 50 to generate power by the flywheel 60.

[0035] In addition, the rotation speed ratio of each of the rotational power input terminals and the rotational power transmission terminals of the transmission module 50 may all be 1:1, inputting torques different from each power source itself, or the rotation speed ratios of each of the rotational power input terminals and the rotational power transmission terminals may be different from each other, and may be combined with torques different from each power source itself to generate a stable output power.

[0036] The present invention is not intended to limit the present invention, and is disclosed using the above preferred embodiments. Those skilled in the technical field to which the present invention pertains can clearly understand that the present invention is not limited to the details of the above exemplary embodiments. The embodiments are only for explaining the present invention, not for limiting the present invention. The present invention is based not on the above description, but on the scope of the patent application. All meanings and equivalent scopes within the scope of the patent application belong to the scope of the patent right of the present invention.

Explanation of Signs

[0037] 11 First power storage battery 111 Light energy 112 Commercial power 12 Second power storage battery 13 First power converter 14 Second power converter 20 First motor unit 21 First motor driver 30 Second motor unit 31 Second motor driver 40 Engine unit 41 Shaft coupling 50 Transmission module 500 Three rotational power input terminals 51a First input terminal 51b Second input terminal 51c Third input terminal 52a First clutch 52b Second clutch 52c Third clutch 53 Rotational power output terminal 54 One-way bearing 55 Shaft coupling 60 Flywheel 61 Bearing pedestal 62 Output wheel shaft 65 Reducer 70 Generator 80 Voltage stabilization unit

Claims

1. 1. A flywheel power generation system, comprising: A first power storage battery (11); a first motor unit (20) electrically connected to the first power storage battery (11); a second motor unit (30) electrically connected to the first power storage battery (11); an engine unit (40) electrically connected to the first power storage battery (11); a transmission module (50) having three rotational power input terminals (500) and one rotational power output terminal (53), the rotational power input terminals (500) including a first input terminal (51a), a second input terminal (51b) and a third input terminal (51c), the first input terminal (51a) being connected to a torque output shaft of the first motor unit (20) by a first clutch (52a), the second input terminal (51b) being connected to a torque output shaft of the second motor unit (30) by a second clutch (52b), and the third input terminal (51c) being connected to a torque output shaft of the engine unit (40) by a third clutch (52c); a flywheel (60) connected to the rotary power output terminal (53) by a one-way bearing (54), having an output axle (62), and capable of being rotated by the drive of the rotary power output terminal (53); a generator (70) powerably connected to the output axle (62).

2. 2. The flywheel power generation system of claim 1, wherein the first motor unit (20) has a first maximum torque and a first maximum rotational speed, and the second motor unit (30) has a second maximum torque and a second maximum rotational speed, the second maximum torque being smaller than the first maximum torque and the second maximum rotational speed being greater than the first maximum rotational speed.

3. 2. The flywheel power generation system as described in claim 1, further comprising a second power storage battery (12) electrically connected to the first power storage battery (11), the engine unit (40), the first clutch (52a), the second clutch (52b), and the third clutch (52c) to receive power from the first power storage battery (11) and supply power to the engine unit (40), the first clutch (52a), the second clutch (52b), and the third clutch (52c).

4. 4. The flywheel power generation system according to claim 3, wherein the second power storage battery (12) has a lower voltage than the first power storage battery (11), and the first power storage battery (11) is connected to the second power storage battery (12) after being transformed via a first power converter (13), and the second power storage battery (12) is connected to the first clutch (52a), the second clutch (52b), and the third clutch (52c) after being transformed via a second power converter (14).

5. 2. The flywheel power generation system according to claim 1, further comprising a voltage stabilization unit (80) electrically connected to the generator (70) to stabilize the voltage of the electric power generated by the generator (70) before outputting it.

6. 2. The flywheel power generation system of claim 1, further comprising a reduction gear (65) connected to the output wheel shaft (62) to input rotational power and further connected to the generator (70) for driving the generator (70).

7. The flywheel power generating system of claim 1, wherein the engine unit (40) has a fuel tank and is capable of operating on fuel.

8. 2. The flywheel power generating system according to claim 1, wherein the engine unit (40) and the third clutch (52c), and the transmission module (50) and the one-way bearing (54) are connected by shaft couplings (41, 55), respectively.

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