Modulation Circuit Stabilizing Wireless Power Output
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Solution Overview
Problem
Wireless power transfer systems face issues with undesirable and unpredictable power output variations due to direct power modulation, which can be unfavorable for many loads, especially those requiring constant voltage inputs.
Innovation Solution
A modulation circuit with a switching circuit having multiple states, capable of applying trial modulations to determine the desired modulation direction and applying modulation translations to adjust the modulation mode, ensuring the electrical parameter matches the desired direction, thereby stabilizing the power output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct power modulation is applied for communication between transmitter and receiver, then communication efficiency is improved, but power output stability deteriorates due to undesirable and unpredictable variations
Solution Approach 1:
The system performs a trial modulation before actual communication to determine the modulation direction. This preliminary action identifies whether the load requires increasing or decreasing power during modulation, allowing the system to pre-configure the correct modulation direction and avoid unstable power variations during actual communication.
Solution Approach 2:
The system uses feedback from the load to determine the desired modulation direction. By monitoring the load's response to trial modulation and identifying whether power should increase or decrease, the system adjusts its modulation strategy to maintain stable power output while enabling communication.
2Adaptability or versatility
If modulation direction is not aligned with load requirements, then communication functionality is achieved, but power output stability worsens due to unpredictable variations
Solution Approach 1:
The system dynamically adjusts the modulation direction based on real-time feedback from the load. Instead of using a fixed modulation direction, the system can switch between increasing and decreasing power modulation depending on what the load requires, thereby maintaining both communication functionality and power stability.
Solution Approach 2:
The system changes the modulation parameter (direction) based on load characteristics. By detecting whether the load responds better to power increases or decreases during trial modulation, the system adapts the modulation direction parameter to match load requirements, ensuring stable operation.
3Stability of the object's composition
If trial modulation is applied to determine desired modulation direction, then power output stability is improved, but time consumption increases due to additional modulation steps
Solution Approach 1:
The trial modulation uses partial action by applying only a small test modulation rather than full-power modulation. This allows the system to determine the desired modulation direction with minimal time and power expenditure, reducing the time penalty while still achieving stable power output configuration.
Data Source
AI summary
The present invention provides a modulation circuit and a method for modulating a wireless power transfer circuit. The modulation circuit has a switching circuit having a first state and a second state. The modulation circuit also has a modulation mode in which the first state defines a normal state and the second state defines an operative state. In the operative state, the modulation circuit modulates an electrical parameter of the wireless power transfer circuit in a modulation direction. The modulation circuit is configured to apply a trial modulation to the electrical parameter to determine whether the modulation direction is in a desired modulation direction. The modulation circuit is also configured to apply a modulation translation if the modulation direction is not in the desired modulation direction, with the modulation translation changing the modulation mode such that the modulation direction is in the desired modulation direction.