Bicycle excitation power generation system

Abstract

This invention relates to a bicycle excitation power generation system, comprising: a generator including a stator and a rotor that are rotatable relative to each other, one of the stator and the rotor being provided with an electromagnet and the other with an induction coil winding, the generator being mounted on a bicycle so that the rotor can be driven to rotate by a wheel of the bicycle; an electronic control unit electrically connected to the generator; a battery unit electrically connected to the electronic control unit; and a triggering device communicating with the electronic control unit; wherein, operating the triggering device triggers the electronic control unit to control the electrical conduction of the battery unit and the electromagnet, so that the electromagnet generates a magnetic field and acts on the induction coil winding.

Description

Technical Field

[0001] This invention relates to a power generation system, and more particularly to a bicycle excitation power generation system. Prior Technology

[0002] Conventional power generation devices employ passive permanent magnet excitation, resulting in a constant magnetic resistance between the stator and rotor. When such devices are applied to bicycles, for example, the rotation of the wheels drives the device, continuously generating magnetic flux between the stator and rotor as the wheels rotate. While this generates electricity, it still creates continuous magnetic resistance when power or lighting is not needed, increasing the burden on the rider.

[0003] Furthermore, conventional passive systems cannot adjust the excitation intensity and output according to different road conditions or power demand. The voltage and current generated by conventional power generation devices are also relatively small, resulting in poor power generation efficiency. They also cannot increase magnetic resistance to cooperate with braking when deceleration is required, and cannot simultaneously take into account energy recovery and consumable life.

[0004] Therefore, it is necessary to provide a novel and progressive bicycle excitation power generation system to solve the above problems. Summary of the Invention

[0005] The main objective of this invention is to provide a bicycle magnetization power generation system that can effectively convert kinetic energy into electrical energy. Under normal circumstances, there is no magnetic resistance, but during the power generation process, there is magnetic resistance, which can increase the braking deceleration effect, reduce the wear of brake pads, and balance the power generation efficiency, riding resistance and braking synergy.

[0006] To achieve the above objectives, the present invention provides a bicycle excitation power generation system, comprising: a generator including a stator and a rotor that are rotatable relative to each other, wherein one of the stator and the rotor is provided with an electromagnet and the other is provided with an induction coil winding, the generator being mounted on a bicycle so that the rotor can be driven to rotate by a wheel of the bicycle; an electronic control unit electrically connected to the generator; a battery unit electrically connected to the electronic control unit; and a triggering device communicating with the electronic control unit; wherein, operating the triggering device triggers the electronic control unit to control the electrical conduction of the battery unit and the electromagnet, so that the electromagnet generates a magnetic field and acts on the induction coil winding. Simple Explanation of the Diagram

[0007] Figure 1 is a perspective view of a bicycle excitation power generation system configured on a bicycle according to an embodiment of the present invention. Figure 2 is a schematic diagram of a generator according to an embodiment of the present invention. Figure 3 is a block diagram showing the structural relationship of a bicycle excitation power generation system according to an embodiment of the present invention. Figure 4 is an electrical curve diagram of power supply to a generator according to an embodiment of the present invention. Implementation

[0008] The following examples illustrate possible implementations of the present invention, but are not intended to limit the scope of protection of the present invention. The use of "a" or "at least one" before the terms mentioned herein is not a limitation on the quantity, and may also be "multiple" depending on the requirements. Such variations in quantity are also within the scope of protection, and are therefore stated in advance.

[0009] Please refer to Figures 1 to 4, which show one embodiment of the present invention. The bicycle excitation power generation system of the present invention includes a generator 10, an electronic control unit 20, a battery unit 30, and a triggering device 40.

[0010] The generator 10 includes a stator 11 and a rotor 12 that are rotatable relative to each other. One of the stator 11 and the rotor 12 is equipped with an electromagnet 13, and the other with an induction coil winding 14. The generator 10 is mounted on a bicycle 100 so that the rotor 12 can be driven to rotate by a wheel 101 of the bicycle 100. An electronic control unit 20 is electrically connected to the generator 10. A battery unit 30 is electrically connected to the electronic control unit 20. A triggering device 40 is connected to the electronic control unit 20. Operating the triggering device 40 triggers the electronic control unit 20 to control the electrical conduction of the battery unit 30 and the electromagnet 13, causing the electromagnet 13 to generate a magnetic field that acts on the induction coil winding 14. This allows for excitation only when needed, eliminating magnetic resistance during normal cruising and coasting, while increasing excitation to increase resistance and improve energy recovery efficiency when going downhill or needing to decelerate, thus balancing riding comfort and safety.

[0011] In this embodiment, the generator 10 is integrated as a hub, allowing direct integration into the axle area of ​​the wheel 101 to reduce modification difficulty and maintain wheel dynamic balance. Integrating the generator 10 as a hub into the wheel 101 maintains overall mass distribution symmetry and reduces modifications to the frame and fork. The rotor 12 is equipped with the electromagnet 13; rotation of the rotor 12 causes the electromagnet 13 to generate a magnetic field corresponding to the induction coil winding 14, resulting in good power generation efficiency. Depending on different battery specifications, such as 25 volts, 29 volts, or higher, the generator 10 of this invention can generate 29 volts, 42 volts, or higher, producing high-power electrical energy and exhibiting excellent charging performance.

[0012] The stator 11 is housed within the rotor 12. This configuration shortens the magnetic circuit, increases magnetic flux density, and facilitates vibration reduction, noise reduction, and structural protection. Alternatively, the stator 11 can be equipped with the electromagnet 13, while the rotor 12 can be equipped with the induction coil winding 14. Preferably, a heat dissipation structure, such as heat sink fins, can be provided on the rotor 12 to prevent excessive temperature from affecting power generation efficiency and to ensure safety.

[0013] In detail, the triggering device 40 includes an operating member 41, which is mounted on the bicycle 100 and is movable relative to the bicycle 100. For example, the operating member 41 can be simultaneously integrated with the brake lever of the bicycle 100 (same lever or different lever). By arranging the operating member 41 close to the handlebars, the rider can easily and intuitively perform excitation control, improving riding safety. The operation of the operating member 41 can generate a control signal, which can be an analog signal (e.g., the magnitude of changes in pressure, travel, or other physical characteristics) or a digital signal (which can be preset in the electronic control unit 20). The electronic control unit 20 controls the magnitude of the current and / or voltage of the battery unit 30 and the electromagnet 13 based on the control signal. The operating element 41 of the triggering device 40 can generate the control signal through a cable, microswitch, or Hall element, and the electronic control unit 20 can achieve a fine conduction curve in an analog / digital control manner to meet the needs of different riding situations. In this way, the excitation intensity can be adjusted according to the slope, load, lighting, or other riding requirements.

[0014] Preferably, the electronic control unit 20 controls the current and / or voltage of the battery unit 30 and the electromagnet 13 to gradually increase, thereby achieving a soft start effect and avoiding the impact of sudden surges on riding safety, smoothness, and comfort due to transient large torque. Preferably, the electronic control unit 20 controls the current and / or voltage of the battery unit 30 and the electromagnet 13 to increase non-linearly, for example, exponentially or in a piecewise curve (as shown in Figure 4), which can balance riding safety, smoothness, and comfort, and conforms to the optimal control curve based on human perception and vehicle speed changes.

[0015] Furthermore, the electronic control unit 20 includes a charging module 21, which is connected between the generator 10 and the battery unit 30. The electricity generated by the generator 10 is processed by the charging module 21 and then used to charge the battery unit 30. The charging module 21 may include rectification, buck-boost, and battery management functions to improve charging efficiency and lifespan.

[0016] Preferably, the battery unit 30 includes multiple batteries 31. During the power supply process to the generator 10, the electronic control unit 20 controls the power supply to the generator 10 only from the multiple batteries 31 that are not in a charging state. During the charging process of the battery unit 30, the electronic control unit 20 controls the charging of only the multiple batteries 31 that are not in a power supply state. In this way, the battery rotation mechanism can reduce the cyclic load, overheating, and performance degradation (thermal decay) of each battery 31, and can balance the lifespan of the multiple batteries 31 and improve the overall reliability.

[0017] In operation, under normal conditions, when the trigger device 40 is not operated, the electronic control unit 20 does not connect the battery unit 30 and the electromagnet 13, and no magnetic resistance is generated between the stator 11 and the rotor 12, which helps to reduce riding energy consumption. When the operating element 41 is operated to output the control signal, the electronic control unit 20 gradually or non-linearly increases the conduction current and / or voltage according to the control signal, so that the electromagnet 13 generates a magnetic field and acts on the induction coil winding 14. On the one hand, it can charge the battery unit 30, and on the other hand, it can provide electromagnetic resistance as braking assistance when going downhill or needing to decelerate, which helps to reduce brake pad wear and improve safety.

[0018] 10: Generator 11: Stator 12: Rotor 13: Electromagnet 14: Induction coil winding 20: Electronic Control Unit 21: Charging Module 30: Battery Unit 31: Battery 40: Triggering device 41: Operating components 100: Bicycle 101: Wheel

Claims

1. A bicycle excitation power generation system, comprising: A generator includes a stator and a rotor that are rotatable relative to each other. One of the stator and the rotor is provided with an electromagnet, and the other is provided with an induction coil winding. The generator is mounted on a bicycle so that the rotor can be driven to rotate by a wheel of the bicycle. An electronic control unit is electrically connected to the generator. A battery unit is electrically connected to the electronic control unit. A triggering device is communicated with the electronic control unit. Operating the triggering device triggers the electronic control unit to control the electrical conduction of the battery unit and the electromagnet, causing the electromagnet to generate a magnetic field that acts on the induction coil winding. The triggering device includes an operating member, which is mounted on the bicycle and is movable relative to the bicycle. Actuation of the operating member generates a control signal, which is an analog signal or a digital signal. The electronic control unit controls the magnitude of the current and / or voltage that electrically conducts the battery unit and the electromagnet based on the control signal.

2. The bicycle excitation power generation system as claimed in claim 1, wherein the generator system is a hub.

3. The bicycle excitation power generation system as claimed in claim 1, wherein the stator is housed in the rotor.

4. The bicycle excitation power generation system as claimed in claim 1, wherein the rotor is provided with the electromagnet.

5. The bicycle excitation power generation system as claimed in claim 1, wherein the electronic control unit controls the current and / or voltage of the battery cell and the electromagnet to gradually increase.

6. The bicycle excitation power generation system as claimed in claim 5, wherein the electronic control unit controls the current and / or voltage of the battery cell and the electromagnet to increase non-linearly.

7. The bicycle excitation power generation system as claimed in claim 1, wherein the electronic control unit includes a charging module connected between the generator and the battery unit, wherein the electricity generated by the generator is processed by the charging module to charge the battery unit.

8. A bicycle excitation power generation system, comprising: A generator includes a stator and a rotor that are rotatable relative to each other. One of the stator and the rotor is provided with an electromagnet, and the other is provided with an induction coil winding. The generator is designed to be mounted on a bicycle so that the rotor can be driven to rotate by a wheel of the bicycle. An electronic control unit is electrically connected to the generator. A battery unit is electrically connected to the electronic control unit. A triggering device is connected to the electronic control unit. The triggering device activates the electronic control unit to electrically connect the battery unit and the electromagnet, causing the electromagnet to generate a magnetic field that acts on the induction coil winding. The battery unit includes multiple batteries. During power supply to the generator, the electronic control unit controls the supply of power to the generator only from the batteries that are not currently charging. During charging of the battery unit, the electronic control unit controls the charging of the batteries that are not currently charging only.

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