Secondary Coil System for Inductive Vehicle Power
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Solution Overview
Problem
Existing inductive vehicle supply systems are limited to linear movement along a primary conductor and face energy disruptions when transitioning between conductors, as they rely on uniform magnetic flux for voltage induction, which is not feasible in non-linear or off-track movements.
Innovation Solution
A secondary coil system comprising a first coil with series-connected windings and a second coil made of two partial coils with opposite winding senses, allowing voltage induction even with non-uniform magnetic flux, connected in series to provide a constant direct voltage during transitions between primary conductors, and compensated with capacitors to maintain efficiency across varying clearances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single primary conductor is used for inductive supply, then the vehicle can be supplied along a linear track, but the system fails when the vehicle deviates from the track or transitions between conductors due to non-uniform magnetic flux
Solution Approach 1:
The secondary coil is segmented into multiple independent coils (first coil with series-connected windings, second coil with first and second partial coils). Each coil can independently generate voltage under different flux conditions, allowing the system to maintain reliability across various movement scenarios including track deviations and transitions between primary conductors.
Solution Approach 2:
The second coil employs asymmetric winding with opposite winding senses in its partial coils. This asymmetry enables the coil to generate voltage even when magnetic flux direction varies during transitions between primary conductors, resolving the contradiction between movement flexibility and energy supply continuity.
2Adaptability or versatility
If the secondary coil is designed for uniform flux induction, then voltage can be induced during linear movement, but the system cannot handle non-linear movements or transitions between conductors with opposite current directions
Solution Approach 1:
The secondary coil is divided into functionally distinct segments (first coil for uniform flux conditions, second coil with opposite-winding partial coils for non-uniform flux conditions). This segmentation allows each segment to be optimized for specific movement types without requiring complete redesign of the entire coil system.
Solution Approach 2:
The multi-coil secondary system serves multiple functions: the first coil handles linear track-following movements, while the second coil with opposite-winding partial coils handles transitions between conductors and non-linear movements. This multi-functionality increases adaptability without proportionally increasing overall system complexity.
3Adaptability or versatility
If the vehicle transitions between parallel primary conductors with opposite current directions, then area movement becomes possible, but uniform magnetic flux cannot be maintained making voltage induction impossible in conventional systems
Solution Approach 1:
The second coil's partial coils are wound in opposite senses, creating an asymmetric structure that converts the non-uniform, alternating flux pattern encountered during transitions between conductors with opposite current directions into usable voltage. This asymmetric design maintains inductive supply efficiency during area movements that would otherwise be impossible.
Solution Approach 2:
The system converts the harmful effect of non-uniform and alternating magnetic flux during conductor transitions into a beneficial voltage induction mechanism. The opposite-winding partial coils are specifically designed to exploit the alternating flux pattern, transforming what would be a disruptive condition into a productive energy source.
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
Enables uninterrupted energy supply during non-linear movements by inducing voltage in both coils, ensuring continuous power delivery and high efficiency even when the vehicle deviates from the primary conductor track, with the ability to switch between conductors without energy loss.
Implementation Method 1
a secondary coil for the inductive supply of the vehicle from a primary conductor system installed in the system
Implementation Method 2
By compensating the inductivities of the secondary coil with the aid of connected capacities which are adapted to the alternating current impressed on the primary conductor, high efficiency is achievable even when the clearance between the secondary coil and the most proximate primary conductor is variable.
Data Source
AI summary
A system having vehicles, each including a secondary coil for the inductive supply of the vehicle from a primary conductor system, wherein the secondary coil includes a coil core, which has at least one main limb, the secondary coil being made up of a first and a second coil, each composed of windings which enclose the main limb in each case, the first coil arranged such that the windings are connected in series, and the induction voltage arising at the coil corresponds to the sum of the individual voltages induced at all windings when the magnetic flux enclosed by an individual winding in the main limb always has the same direction, especially in each winding of the first coil, the second coil arranged such that the second coil is made up of a first type of windings, i.e., a first partial coil, and of a second type of windings.