Balanced Electromagnetic Resonator for Wireless Power
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in achieving balanced impedance matching, leading to increased common mode noise and electromagnetic interference (EMI) with single bank matching networks, while two bank networks are costly and complex to assemble.
Innovation Solution
A split resonator design with a matching network placed between two coils of equal inductance value, using reactive and/or resistive components to achieve a balanced circuit topology, reducing common mode noise and EMI without additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single bank matching network is used, then the device complexity and component cost are reduced, but common mode noise and electromagnetic interference increase
Solution Approach 1:
The resonator is segmented into two separate coils (first coil and second coil) with equal inductance values, where the matching network is divided and placed between them. This segmentation creates a balanced circuit topology that reduces common mode noise and EMI while maintaining simplicity comparable to single bank networks.
2Object-generated harmful factors
If a two bank matching network is used, then common mode noise and EMI are reduced, but device complexity and component cost increase
Solution Approach 1:
While maintaining symmetric inductance values (L1 = L2) for noise reduction, the matching network is asymmetrically positioned between the two coils rather than at one end, creating a balanced topology that achieves EMI reduction without requiring two separate component banks.
3Object-generated harmful factors
If a two bank matching network is used, then common mode noise and EMI are reduced, but manufacturing cost increases
Solution Approach 1:
The matching network components are merged and positioned between the two coils of equal inductance, combining the functions of impedance matching and EMI reduction into a single integrated configuration that avoids the cost of two separate component banks while maintaining balanced topology.
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 provides a balanced resonator topology with reduced common mode noise and EMI, comparable to two bank networks, but with the simplicity and cost-effectiveness of a single bank network.
Implementation Method 1
An alternating electric current received by the electromagnetic resonator generates an alternating magnetic field or an alternating magnetic field received by the electromagnetic resonator generates an alternating electric current
Data Source
Figure 1A
Figure 1B
Figure 2~4
AI summary
A bifurcated electromagnetic resonator (100) split into two separate coils, a first coil (102) and a second coil (104). The inductance value of the first coil (102) is substantially equal to the inductance value of the second coil (104). A matching network (108) comprising passive electronic components, such as capacitors and inductors, is in series with and intermediate to the first coil (102) and the second coil (104). This results in a resonator (100) having a balanced circuit topology. The bifurcated resonator (100) may be used as a source resonator (14) and/or capture resonator (18) in a wireless power transfer system (10).