Wireless Power Transmitter with Blocking Unit for Heat and EMI Management
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Solution Overview
Problem
Existing wireless power transmission systems face increased complexity and cost due to the need for separate transformers for magnetic induction and resonance schemes, leading to heat and electromagnetic wave issues that degrade component performance.
Innovation Solution
A wireless power transmitter design that includes a blocking unit to isolate components and the wireless transmission unit, using a single substrate with embedded transmission lines and multiple blocking units to manage heat and electromagnetic waves, and a transmission unit with a transmission power converter and antenna that selects between charging schemes using a transmission scheme selecting unit and power converting units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two independent transformers are employed for magnetic induction and magnetic resonance schemes, then the wireless power transmitter can support both charging schemes, but the device complexity and cost are increased
Solution Approach 1:
A single transformer is designed to perform multiple functions by supporting both magnetic induction and magnetic resonance charging schemes. The transformer can operate in different modes depending on the charging requirement, eliminating the need for separate transformers for each scheme and reducing overall device complexity.
Solution Approach 2:
The patent combines the functions of two separate transformers (one for magnetic induction and one for magnetic resonance) into a single unified transformer. This merging reduces the number of components, simplifies the circuit design, and lowers the overall complexity of the wireless power transmitter while maintaining support for both charging schemes.
2Adaptability or versatility
If two independent transformers are employed for magnetic induction and magnetic resonance schemes, then the wireless power transmitter can support both charging schemes, but the circuit design complexity is increased
Solution Approach 1:
The single transformer is designed with universal functionality to support both magnetic induction and magnetic resonance schemes through a unified circuit design. This approach simplifies the overall circuit architecture by eliminating the need for separate independent circuits for each charging scheme, reducing design complexity while maintaining versatility.
3Adaptability or versatility
If multiple components are included in the wireless power transmitter, then the functionality is enhanced, but heat and electromagnetic waves generated from the components deteriorate the performance of the components and the wireless power receiver
Solution Approach 1:
The patent employs a shielding unit that converts the harmful electromagnetic waves generated by the transformer and other components into a contained field that does not interfere with the charging process. The shielding structure redirects and contains the electromagnetic radiation, preventing it from deteriorating component performance and affecting the wireless power receiver.
Solution Approach 2:
The wireless power transmitter is divided into functionally separated modules with the shielding unit positioned between the transformer and the wireless power receiver. This segmentation isolates the heat-generating and electromagnetic wave-generating components from the sensitive receiving components, allowing each module to function independently while minimizing mutual interference.
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 design reduces the complexity and cost of the wireless power transmitter, effectively managing heat and electromagnetic waves to improve performance and efficiency across different charging schemes.
Implementation Method 1
a blocking unit to isolate components and the wireless transmission unit
Implementation Method 2
The magnetic induction scheme, which is a contactless energy transmission technique which generates electromotive force at one coil through the medium of a magnetic flux generated by allowing two coils to approach closely to each other and current to flow through the other coil
Implementation Method 3
The magnetic resonance scheme, which is a magnetic resonance technique which uses an electric or magnetic field without using any electromagnetic waves or electric currents
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3
AI summary
Disclosed is a wireless power transmitter. The wireless power transmitter includes a substrate; a first blocking unit disposed over the substrate and formed of a metallic material; a second blocking unit over the first blocking unit; and a wireless transmission unit mounted on at least one of the first blocking unit and the second blocking unit, wherein the wireless transmission unit includes: a first wireless transmission unit including a first transmission coil; a second wireless transmission unit including a second transmission coil; and a control unit to control such that AC power is output to a transmission coil of one of the wireless transmission units according to a power transmission scheme.