Self-Powered Stator-Rotor Pedal Generator for Cycling Sensor Charging
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Solution Overview
Problem
Conventional power pedals on bicycles and indoor exercise bikes require frequent battery replacement or charging, which is inconvenient for users.
Innovation Solution
A self-powered apparatus with a pedal unit, spindle, generator, energy storage element, and sensors that generate power during pedaling, using a generator with a stator and rotor to charge the energy storage element, eliminating the need for frequent battery replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional power pedal with battery is used, then the sensor can measure riding data, but the battery requires frequent replacement or charging which is inconvenient
Solution Approach 1:
The system enables self-powered operation by capturing mechanical energy from pedaling through the generator and storing it in the energy storage element, allowing the device to charge itself during normal operation without requiring external charging or battery replacement by the user
Solution Approach 2:
The system dynamically converts mechanical energy from the pedaling motion into electrical energy through the generator, which then charges the energy storage element, creating a dynamic energy harvesting and storage mechanism that adapts to the rider's pedaling activity
2Use of energy by moving object
If a generator with stator and rotor is added to generate power during pedaling, then the energy storage element can be charged, but the device complexity increases
Solution Approach 1:
The generator components (stator and rotor) are integrated into the existing pedal mechanism, merging the power generation function with the pedaling structure. The stator is disposed on the spindle while the rotor is disposed on the pedal unit, combining multiple functions within a unified structure
Solution Approach 2:
The pedal unit serves multiple functions: it provides the mechanical interface for riding, acts as the rotor for the generator to capture mechanical energy, and houses the energy storage element. This multi-functionality reduces the need for separate components and simplifies the overall system
3Power
If the stator and rotor are positioned with specific spacing, then power generation efficiency is optimized, but the manufacturing precision requirements increase
Solution Approach 1:
The system maintains a balanced magnetic field configuration through the specific spacing between stator and rotor, creating an optimal magnetic circuit that maximizes power generation efficiency while maintaining manufacturing feasibility through standardized dimensional relationships
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus effectively generates power during pedaling to charge the energy storage element, extending the usage time of the power supply and improving charging convenience without increasing the apparatus' volume or shape.
Implementation Method 1
the generator includes a stator and a rotor. The stator is disposed on the spindle, the rotor is disposed on the inner surface of the pedal unit... When the pedal unit is being pedaled to rotate by a rider, the stator is fixed on the spindle, the rotor rotates relatively to the stator and along with the pedal unit, and a generated power is generated by the generator to charge the energy storage element
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A self-powered apparatus is used for various kinds of cycling and indoor exercise devices. The self-powered apparatus (100) includes a pedal unit (110), a spindle (140), a generator (104) and an energy storage element (179). The pedal unit includes an inner surface (111) to form an accommodating space (115) therein. The spindle is accommodated in the accommodating space. The generator includes a stator (150) and a rotor (160). The stator is disposed on the spindle, the rotor is disposed on the inner surface of the pedal unit, and the rotor surrounds the stator correspondingly and is non-contact with the stator. The energy storage element is electrically coupled to the generator. When the pedal unit is being pedaled to rotate by a rider, the stator is fixed on the spindle, the rotor rotates relatively to the stator and along with the pedal unit, and a power is generated by the generator to charge the energy storage element.