Rectifier Circuit Mode Switching for Stable FSK Communication
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Solution Overview
Problem
Non-contact power supply transmitter systems experience erroneous detection of FSK signals due to distortion in the rectification waveform, which is exacerbated by frequency variations and timing issues in the rectifier circuit, leading to unstable communication.
Innovation Solution
The system includes a transmitting device with an FSK modulation unit and a receiving device with an FSK demodulation unit, where the rectifier circuit's mode is switched to diode rectifying during FSK communication to prevent distortion, ensuring stable signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a rectifier circuit is used to rectify the induced electric current, then power transmission efficiency is improved, but distortion is superimposed on the rectification waveform causing erroneous detection of FSK signals
Solution Approach 1:
The rectifier circuit dynamically switches between two operating modes: a first rectifying mode during FSK communication that prevents waveform distortion and ensures accurate signal detection, and a second rectifying mode during power transmission that optimizes power transfer efficiency. This dynamic mode switching resolves the contradiction by adapting the rectifier's characteristics to the current operational requirement.
Solution Approach 2:
The invention changes the operating parameters of the rectifier circuit by switching between different rectifying modes. During FSK communication, the circuit parameters are adjusted to prevent distortion of the rectification waveform, while during power transmission, parameters are optimized for efficient power transfer. This parameter transformation allows the system to achieve both accurate signal detection and high power transmission efficiency at different times.
2Adaptability or versatility
If frequency variation is introduced for FSK modulation, then communication capability is improved, but distortion of the rectification waveform increases leading to erroneous detection
Solution Approach 1:
The system dynamically adjusts the rectifier circuit's operating mode based on the communication phase. During FSK modulation with frequency variation, the rectifier switches to a mode that maintains waveform integrity, allowing accurate detection despite frequency changes. This dynamic adaptation enables both communication versatility and detection precision to coexist.
Solution Approach 2:
The system performs preliminary action by switching the rectifier to an appropriate mode before FSK communication begins. This preparatory mode switching ensures that the rectification waveform remains undistorted during the subsequent frequency-varying FSK modulation, preventing erroneous detection and maintaining measurement precision throughout the communication process.
3Productivity
If switching timing in the rectifier circuit is optimized for power transmission, then power transfer efficiency is improved, but delicate gap of switching timing causes distortion and communication errors
Solution Approach 1:
The rectifier circuit employs dynamic switching between different operating modes rather than fixed timing optimization. During power transmission, switching timing is optimized for maximum efficiency, while during FSK communication, the circuit switches to a mode with less sensitive timing requirements that prevents waveform distortion. This dynamic approach allows the system to achieve high productivity during power transfer while maintaining communication reliability.
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 configuration enables stable FSK communication by eliminating distortion during FSK signal transmission, improving detection accuracy and reliability in non-contact power supply systems.
Implementation Method 1
a driver configured to cause the transmitting coil to generate a power signal of an electromagnetic field
Implementation Method 2
a receiving coil; a rectifier circuit configured to rectify an electric current induced by the receiving coil
Data Source
AI summary
A non-contact power supply transmitter system 100 transmitting an electric power from a transmitting device (TX) 200 to a receiving device (RX) 300 with a non-contact power supply transmitter method, the TX 200 including: a transmitting coil 202; a driver 204 causing the transmitting coil to generate a power signal of the electromagnetic field; and an FSK modulation unit 240 transmitting an FSK signal Sf through the transmitting coil, the RX 300 including: a receiving coil 302; a rectifier circuit 320 rectifying an electric current induced by the receiving coil; an FSK demodulation unit 340 demodulating the FSK signal received through the receiving coil; and a controller 312 controlling so that a rectifying mode of the rectifier circuit is switched to a diode rectifying mode during the FSK communication. The non-contact power supply transmitter system 100 and the RX 300 can execute a stable FSK communication.