Inductive Power and Data Transmission Bus
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Solution Overview
Problem
Existing non-contact inductive energy and data transmission systems face limitations in efficiently transmitting high power and reliable data across varying air gaps and multiple consumers without complex control programs or additional carrier media.
Innovation Solution
A system comprising a movably arranged part with a secondary coil inductively coupled to a primary conductor, an electronic circuit, and a bus system for data exchange, enabling efficient power transmission in the hundreds of watts to kilowatts range and data transmission in the hundred kilohertz to megahertz range, using medium-frequency currents and capacitive coupling for resonant frequency matching, and separate secondary coils for reduced error rates, with control information encoded in power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-contact inductive energy transmission is used to power moving parts, then contactless power supply is achieved, but reliable data transmission becomes difficult due to varying air gaps and interference
Solution Approach 1:
The system separates data transmission from power transmission by using two different secondary coils: one optimized for power reception and another optimized for data communication. This segmentation allows each coil to be independently tuned for its specific function, improving data transmission reliability without requiring complex control programs to manage interference between functions
Solution Approach 2:
The patent introduces an intermediary communication protocol that uses the existing inductive coupling channel for data exchange. By encoding data within the power transmission framework and using the electronic circuit on the moving part as an intermediary processor, the system achieves reliable data transmission without additional carrier media or complex external control systems
2Power
If high power transmission in the hundreds of watts to kilowatt range is achieved through inductive coupling, then power supply to moving parts is sufficient, but transmission efficiency decreases with larger air gaps
Solution Approach 1:
The system employs resonant inductive coupling operating at medium frequencies (10-100 kHz) with secondary coils tuned to resonate at these frequencies. By changing the operating parameters to match resonant frequencies and using capacitive coupling elements, the system maintains high transmission efficiency even with larger or varying air gaps while delivering sufficient power in the hundreds of watts to kilowatt range
3Device complexity
If data transmission uses the same inductive coupling channel as power transmission, then no additional carrier media are required, but error rates increase due to disturbances and interference
Solution Approach 1:
The system divides the inductive coupling function into two separate physical coils: one dedicated to power transmission and another dedicated to data transmission. This segmentation physically separates the two functions while maintaining the simplicity of using only inductive coupling, thereby reducing interference and error rates without requiring additional carrier media
Solution Approach 2:
The data transmission uses higher-frequency modulation (hundred kilohertz to megahertz range) superimposed on the power transmission frequency. This periodic modulation at distinct frequency bands allows data to be transmitted through the same inductive channel with minimal interference, maintaining system simplicity while improving data accuracy through frequency division multiplexing
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 reliable, high-efficiency energy and data transmission across large or varying air gaps to multiple consumers with reduced error rates and simplified control, using existing power cables for data transmission without additional carrier media, and allows for decentralized control and reduced computing power requirements.
Implementation Method 1
at least one secondary coil, an electronic circuit and at least one consumer being provided on the part, the secondary coil being inductively coupleable or being coupled to a primary conductor
Implementation Method 2
with a capacitor being connected in series or in parallel with the secondary coil, with the associated resonant frequency essentially corresponding to the medium frequency
Data Source
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AI summary
Installation or machine, comprising a movably arranged part, at least one secondary coil, an electronic circuit and at least one consumer being provided on the part. The secondary coil can be inductively coupled or is inductively coupled to the primary conductor. An electronic circuit is provided on the part, said circuit being supplied by the secondary coil and being adapted to supply a consumer. The electronic circuit and at least one consumer are interconnected via a bus system for the purpose of data exchange.