Inductive Power System with Frequency-Differentiated Primary Sections
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Solution Overview
Problem
Existing systems for inductive power transmission in mobile devices, such as handsets, lack effective safety measures for accurate position determination and power management, especially in environments with multiple primary conductor sections and varying power requirements.
Innovation Solution
The system employs primary conductor sections supplied with alternating current by feed devices, featuring a mobile part with a secondary winding for inductive coupling, which uses frequency differentiation to determine position and power requirements, allowing for efficient power transmission and position verification through a controller connected to data exchange and position determination means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frequency differentiation is used to determine position in multiple primary conductor sections, then position determination accuracy is improved, but device complexity increases due to multiple feed devices and frequency management
Solution Approach 1:
The system divides the facility into multiple position ranges, each served by a dedicated primary conductor section with its own feed device operating at a unique frequency. This segmentation allows the mobile part to determine its position by detecting which frequency is present, achieving accurate position determination without complex centralized control.
Solution Approach 2:
The patent introduces frequency as an intermediary parameter to convey position information. Instead of direct communication between the mobile part and control system, the feed devices modulate their output frequency according to position range, and the mobile part detects this frequency to infer position, simplifying the overall system architecture.
2Productivity
If multiple primary conductor sections operate simultaneously with different frequencies, then power transmission to multiple handsets is improved, but interference between conductors increases
Solution Approach 1:
The system changes the frequency parameter of each primary conductor section to a unique value within the same frequency band. By carefully selecting frequencies that are sufficiently separated, the system enables simultaneous power transmission to multiple handsets while minimizing electromagnetic interference between adjacent conductors.
Solution Approach 2:
The feed devices operate with periodic alternating currents at different frequencies, creating distinct electromagnetic fields that can be independently detected. This periodic action at differentiated frequencies allows multiple power transmission channels to coexist without significant interference.
3Ease of operation
If the mobile part moves freely in the travel area, then ease of operation is improved, but continuous power supply reliability deteriorates when moving between primary conductor sections
Solution Approach 1:
The system transitions from static inductive coupling to dynamic tracking coupling. The feed devices continuously adjust their operating parameters to maintain optimal coupling with the mobile part as it moves between position ranges. This dynamic adaptation ensures continuous power supply even during transitions between primary conductor sections.
Solution Approach 2:
The system prepares for transitions between primary conductor sections by pre-coordinating frequency and power level adjustments. When the mobile part approaches a boundary between position ranges, the feed devices proactively adjust their parameters to ensure seamless power transfer, preventing interruptions in the power supply.
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 solution enables accurate position determination and secure power management, allowing handsets to operate freely with reliable power transfer even when multiple devices are connected, and provides warnings for position errors, ensuring safety and efficiency in power usage.
Implementation Method 1
the mobile part has a secondary winding, in particular on its underside, which can be inductively coupled, in particular coupled, to one of the primary conductor sections
Implementation Method 2
the secondary winding has a capacitance connected in parallel and/or in series, with the resonant circuit formed in this way having a resonant frequency
Data Source
Figure 1
AI summary
The invention relates to a system having primary conductor sections which are supplied with alternating current by respective feed-in devices and having at least one mobile part, and to a method for operating such a system, wherein: the mobile part has, in particular on the underside thereof, a secondary coil, which can be, in particular is, coupled inductively to one of the primary conductor sections; the feed-in devices inject respective alternating currents at different frequencies into the primary conductor sections; and the mobile part has a means for detecting the frequency of the alternating current injected into the primary conductor section coupled inductively to the secondary coil.