Wireless Power Transmitter Bridge Circuit for Coil Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless power transmitters face challenges in minimizing mutual interference between multiple resonance coils, which can reduce the efficiency and effectiveness of wireless power transmission.
Innovation Solution
A wireless power transmitter design that includes a common bridge circuit and sub-bridge circuits to apply alternating currents to resonance coils, maintaining the same potential across non-operated resonators, thereby reducing interference and expanding the wireless chargeable area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple resonance coils are provided to expand the chargeable area, then the wireless charging coverage is improved, but mutual interference between coils increases
Solution Approach 1:
The patent applies equipotentiality by maintaining the same potential (voltage) across non-operated resonators through the sub-bridge circuit. When one resonator is activated for power transmission, the sub-bridge circuit ensures that other resonators remain at equal potential, preventing current flow and eliminating mutual interference between overlapping coils while preserving the expanded chargeable area
2Area of stationary object
If resonance coils overlap to provide wider coverage, then the chargeable area is expanded, but interference between overlapping coils increases
Solution Approach 1:
The sub-bridge circuit implements equipotentiality by maintaining equal voltage across non-operated resonators. This prevents current flow in overlapping coils that are not actively transmitting power, eliminating interference and ensuring reliable power transmission even when multiple coils are positioned to overlap for expanded coverage
3Device complexity
If a common bridge circuit is used to apply voltage to multiple resonators, then the device complexity is reduced, but mutual interference between resonators cannot be eliminated
Solution Approach 1:
The patent segments the bridge circuit functionality by separating the common bridge circuit (shared by all resonators) from individual sub-bridge circuits (dedicated to each resonator). The common bridge circuit provides simplified voltage application, while the sub-bridge circuits add targeted control to eliminate mutual interference, achieving a balance between device complexity and interference elimination
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
The solution effectively minimizes mutual interference between resonance coils, enhancing the efficiency and coverage of wireless power transmission by maintaining equal voltages across non-operated resonators, even when coils overlap.
Implementation Method 1
resonators transmitting power in a non-contact manner
Implementation Method 2
a resonance coil and a resonance capacitor
Data Source
AI summary
A wireless power transmitter includes a common bridge circuit configured to apply a first alternating current (AC) voltage to a terminal of each of a first resonator and a second resonator of the resonators, a first sub-bridge circuit configured to apply a second alternating current (AC) voltage to another terminal of the first resonator while the first alternating current (AC) voltage is being applied to the terminal of the first resonator, and a second sub-bridge circuit configured to apply a third alternating current (AC) voltage to another terminal of the second resonator while the first alternating current (AC) voltage is being applied to the terminal of the first resonator.