Contactless Energy Transmission Using Ribbon Cable Secondary Windings
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Solution Overview
Problem
Existing contactless energy transmission systems require significant effort and resources to produce complex coil windings and manage electrical connections, leading to inefficiencies and increased emissions.
Innovation Solution
A system utilizing a primary conductor with a secondary winding made from a ribbon cable with multiple parallel conductors, forming series resonant circuits that match the center frequency of the primary current, allowing for efficient and cost-effective production of coil windings and compact integration of components within a pick-up head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional coil windings are used in contactless energy transmission systems, then energy transfer can be achieved, but the production effort and complexity increase significantly
Solution Approach 1:
The coil winding is divided into multiple independent ribbon cables, each forming a partial winding. These ribbon cables can be produced separately and then assembled, significantly reducing the complexity of producing large coil windings as a single piece while maintaining the required electrical characteristics
Solution Approach 2:
Multiple ribbon cables are combined and arranged in periodic order from inside to outside to form the complete secondary winding. This merging approach allows the system to achieve the required number of partial windings with little additional effort, as the modular ribbon cable structure enables straightforward assembly
2Reliability
If adjacent conductors are arranged in different ribbon cables radially next to each other, then voltage between partial windings is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The conductor arrangement transitions from a single-plane configuration to a multi-dimensional periodic pattern. By arranging conductors radially next to each other in alternating ribbon cables and positioning them in periodic order from inside to outside, the system creates a spatial distribution that naturally reduces voltage between adjacent partial windings while maintaining manufacturability
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 approach reduces the effort and cost of winding production, minimizes electromagnetic emissions, and enables efficient energy transfer with reduced voltages and currents within a compact, insulated, and protected transformer head, suitable for humid or wet environments.
Implementation Method 1
a pick-up head (2) comprising a secondary winding (20) that can be inductively coupled to the primary conductor system (10, 200)
Implementation Method 2
each of the partial windings (41, 42) with an associated capacitance (6) forming a series resonant circuit, the resonance frequency of which essentially corresponds to the center frequency of the primary current
Data Source
Figure 1a
Figure 1b
Figure 1c
AI summary
The invention relates to a contactless energy transmission system comprising at least one primary conductor system and a transmission head comprising at least one secondary conductor system that is inductively coupled to the primary conductor system. The secondary winding comprises at least one flat ribbon cable (20) comprising at least two parallel electric conductors that are maintained at a distance from each other and are insulated in relation to each other. The secondary winding consists of partial windings (41, 42) that are respectively formed from one of the electric conductors. Each partial winding (41, 42) forms, with an associated capacity (6), a series-resonant circuit whose resonance frequency essentially corresponds to the average frequency of the primary flow.