Wireless Power Receiver Frequency Collision Avoidance
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Solution Overview
Problem
In wireless charging systems, when multiple wireless power receivers transmit signals to a single wireless power supplier, frequency collisions occur, preventing smooth charging due to the use of the same frequencies for power communication signals.
Innovation Solution
A method where wireless power receivers analyze received signals to determine the presence of power communication signals and modulate transmission signals using different frequencies to avoid collisions, and the wireless power supplier demultiplexes and demodulates these signals to control power supply to each receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple wireless power receivers transmit power communication signals using the same frequency, then the system structure remains simple, but frequency collisions occur preventing smooth charging
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the transmission frequency parameter of power communication signals. Each wireless power receiver changes its transmission frequency based on the number of active receivers detected in the system, thereby avoiding frequency collisions while maintaining relatively simple system operation.
2Reliability
If wireless power receivers use different frequencies for power communication signals, then frequency collisions are avoided, but the system complexity increases
Solution Approach 1:
The patent implements periodic action through a frequency adjustment process that occurs in cycles. The wireless power receiver periodically detects the number of active receivers, determines appropriate transmission frequencies, and adjusts its signaling accordingly. This periodic frequency adjustment reduces signal processing complexity compared to continuous frequency management.
3Productivity
If a single wireless power supplier serves multiple wireless power receivers, then the productivity of power supply is improved, but signal management becomes more difficult
Solution Approach 1:
The patent uses parameter changes to simplify signal management in multi-receiver scenarios. By dynamically adjusting the transmission frequency parameter based on the number of active receivers, the system enables a single wireless power supplier to efficiently serve multiple receivers without requiring complex signal management infrastructure.
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 allows for simultaneous charging of multiple wireless power receivers without frequency collisions, ensuring efficient power transmission and control, thereby enhancing the reliability and speed of wireless charging.
Implementation Method 1
Transmission of power over several meters has been accomplished using microwaves. A power transmission scheme using electromagnetic induction refers to a scheme for transmitting power between a primary coil and a secondary coil. If a magnet is moved around a coil, an induction current is produced.
Implementation Method 2
A system has been developed for transferring electric energy in a wireless scheme using a resonant type power transmission principle of a coupled mode theory as a resonant scheme, although it is spaced apart from a charger by several meters. This wireless charging system uses a physical concept of resonance meaning that, for example, a wine cup rings at the same vibration rate as a tuning fork oscillating beside the wine cup.
Data Source
AI summary
Methods and apparatus are provided for transmission and reception of signals. A signal is received that includes at least one of a power supply signal for wireless charging from a wireless power supplier and a power communication signal from at least one external wireless power receiver. The received signal is analyzed to determine whether the power communication signal is included with the power supply signal in the received signal. A transmission frequency of a transmission signal is determined based on whether the power communication signal is included with the power supply signal in the received signal. Transmission data for control of the wireless charging is modulated, and the modulated transmission data is output as the transmission signal over the transmission frequency.