Driving Circuit for Multi-Frequency Wireless Power Transmitters
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Solution Overview
Problem
Conventional wireless power transmission systems lack compatibility with wireless power receivers operating at different frequencies, limiting their use to specific technical standards and reducing their versatility.
Innovation Solution
A driving circuit and wireless power transmitter that includes multiple transmitter-side coupling circuits operating at different frequencies, with a control circuit that switches between them to ensure compatibility with various standards, using an inverting circuit to convert DC to AC and adjust frequencies dynamically based on load detection and user settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional wireless power transmission system supports only one technical standard, then the system design is simple and focused, but the compatibility with wireless power receivers having different operating frequencies is poor
Solution Approach 1:
The wireless power transmitter is designed with multiple transmitter-side coupling circuits that can operate at different frequencies, allowing a single system to support multiple wireless power transmission standards (such as electromagnetic induction and magnetic resonance). The control circuit dynamically selects and activates the appropriate coupling circuit based on the operating frequency requirements, enabling the system to serve multiple functions and achieve universal compatibility across different standards
Solution Approach 2:
The system employs a control circuit that dynamically adjusts the operating parameters by selecting different transmitter-side coupling circuits based on real-time requirements. The control circuit receives operating frequency information and dynamically activates the appropriate coupling circuit, making the system adaptable and flexible rather than static and fixed to a single standard
2Adaptability or versatility
If multiple transmitter-side coupling circuits operating at different frequencies are used, then compatibility with various standards is improved, but the device complexity increases
Solution Approach 1:
A control circuit acts as an intermediary between the power source and multiple transmitter-side coupling circuits. This intermediary receives operating frequency information, determines which coupling circuit should be activated, and controls the switching between different circuits. The control circuit manages the complexity by providing a centralized decision-making mechanism that coordinates the multiple coupling circuits without requiring them to operate independently
Solution Approach 2:
The system extracts and separates the frequency-specific functionality into distinct transmitter-side coupling circuits, each optimized for a particular frequency range or standard. By isolating the frequency-dependent components into separate modules, the system manages complexity through modularity, allowing each circuit to be independently designed and controlled while maintaining overall system coherence through the control circuit
3Adaptability or versatility
If the inverting circuit outputs AC current at different frequencies for different coupling circuits, then compatibility is improved, but the control complexity increases
Solution Approach 1:
The control circuit implements feedback control by receiving operating frequency information about the wireless power receiver and using this information to determine which transmitter-side coupling circuit should be activated. This feedback mechanism ensures that the system automatically adjusts its output frequency to match the receiver's requirements, achieving frequency compatibility through automated feedback-based decision-making rather than manual configuration
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 wireless power transmission systems to be compatible with receivers operating at different frequencies, allowing for simultaneous charging of multiple devices under various standards, improving efficiency and versatility.
Implementation Method 1
an inverting circuit being configured to covert a DC current to an AC current
Implementation Method 2
wireless power transmission, and further more particularly, to a driving circuit and a wireless power transmitter including the same... transfers electric energy by coupling between a power transmitter and a power receiver in a non-contact manner by electromagnetic induction or magnetic resonance
Data Source
AI summary
The present disclosure relates to a driving circuit and a wireless power transmitter including the same. In view of the fact that a transmitter-side coupling circuit exhibits a high resistance when an AC current having a frequency far away from its operating frequency is applied to input terminals, the present disclosure connects a plurality of transmitter-side coupling circuits which operates at different operating frequencies in parallel at output terminals of the same inverting circuit. The controller controls an operating frequency of the AC current output from the inverting circuit to drive different one of the transmitter-side coupling circuits to operate. Thus, one driving circuit can drive the transmitter-side coupling circuits which operate at different operating frequencies or under different technical standards to supply electric energy. The driving circuit is compatible with wireless power receivers which operate at different operating frequencies, and thus has improved compatibility.