Hub Generator Cable Routing to Suppress Deflection
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Solution Overview
Problem
Existing human-powered vehicle electric power generators face issues with excess deflection of electrical cables, which can lead to inefficiencies and complications in the compact arrangement of components, particularly in hub assemblies.
Innovation Solution
The electric power generator incorporates a stator, rotor, and electrical cables configured to minimize deflection, with the rotor including magnets and the stator featuring an armature and winding coil, allowing the cable to pass through radially outward of the coil, and an electric circuit board disposed adjacent to the stator to reduce cable length and enhance compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the electrical cable is routed through the stator assembly, then the cable deflection is suppressed, but the device complexity increases
Solution Approach 1:
The electrical cable is integrated into the stator assembly structure, merging the cable routing function with the stator housing. This combination suppresses cable deflection while avoiding the need for separate cable management components, thus reducing overall device complexity despite the integration.
Solution Approach 2:
The electrical cable is nested within the stator assembly, with the cable passing through the armature and being contained within the stator housing structure. This nesting approach suppresses cable deflection by providing structural support and guidance within the existing stator components.
2Volume of moving object
If the cable length is reduced by positioning the circuit board adjacent to the stator, then the device compactness is improved, but the ease of manufacture decreases
Solution Approach 1:
The circuit board is positioned in the axial direction adjacent to the stator, utilizing the axial dimension for compact arrangement. This dimensional arrangement reduces the overall device volume while maintaining manufacturability through standard assembly procedures.
3Power
If the rotor includes magnets and the stator includes an armature with winding coil, then the power generation capability is improved, but the device complexity increases
Solution Approach 1:
The rotor and stator assembly serves multiple functions: power generation through electromagnetic induction, structural support for the electrical cable routing, and magnetic field generation. This multi-functionality improves power generation capability while avoiding the need for separate dedicated components for each function.
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
This configuration effectively suppresses cable deflection, facilitates a compact arrangement, and allows for reliable power generation and transmission to the circuit board, even when the vehicle is stationary, while protecting the circuit board within a housing.
Implementation Method 1
the rotor is rotatably mounted on the axle to rotate around a rotational center axis of the electric power generator... the rotor includes at least one magnet... the stator includes an armature disposed on the axle, and the first electrical cable extends axially through the armature
Data Source
AI summary
An electric power generator is provided for a human-powered vehicle. The electric power generator includes an axle, a stator, a rotor and a first electrical cable. The axle has a first axial end, and a second axial end. The stator has a first axial stator-end that faces the first axial end of the axle with respect to the rotational center axis and a second axial stator-end that faces the second axial end of the axle with respect to the rotational center axis. The rotor is rotatably mounted on the axle to rotate around a rotational center axis of the electric power generator. The first electrical cable is electrically connected to the stator on the first axial stator-end of the stator. The first electrical cable extends axially through the stator toward the second axial stator-end of the stator with respect to the rotational center axis.