Wireless Power Transmitter Bridge Circuit Segmentation
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Solution Overview
Problem
Existing wireless power transmitters face challenges in efficiently transmitting varying power levels to different mobile devices within a reduced frequency range, as regulations tighten and devices require distinct charging powers, leading to inefficiencies and increased manufacturing costs.
Innovation Solution
A wireless power transmitter design incorporating a power supply, first and second bridge switching elements forming bridge circuits, and a controller that adjusts operation frequencies and duties based on error information to optimize power transmission, allowing for efficient power delivery to devices with different charging requirements while operating within a limited frequency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single power transmitter operates at fixed frequency, then the device structure is simple, but it cannot efficiently transmit varying power levels to different mobile devices
Solution Approach 1:
The power transmitter is segmented into multiple independent transmitters (first power transmitter and second power transmitter), each capable of operating at different power levels. This segmentation allows the system to adapt to different mobile device power requirements while maintaining relatively simple individual transmitter structures.
Solution Approach 2:
The system dynamically selects which power transmitter to operate based on the power requirements of the mobile device. The controller adjusts the operation state of each transmitter dynamically, enabling adaptability without requiring each transmitter to be complex and adjustable across all power levels.
2Object-affected harmful factors
If transmission frequency range is reduced due to regulations, then electromagnetic interference is reduced, but power transmission efficiency decreases
Solution Approach 1:
Instead of relying on a wide frequency range, the system changes other parameters such as duty cycle and switching timing of the bridge circuits to optimize power transmission efficiency within the restricted frequency range. This allows maintaining efficiency while complying with electromagnetic interference regulations.
Solution Approach 2:
The controller uses feedback from error information to adjust the operation of the power transmitters, optimizing power transmission efficiency within the regulated frequency range. This feedback mechanism compensates for the limitations imposed by restricted frequency ranges.
3Adaptability or versatility
If multiple power transmitters are added to handle different power levels, then power transmission versatility is improved, but manufacturing cost increases
Solution Approach 1:
The system uses multiple copies of standardized power transmitter modules rather than one complex adjustable transmitter. This copying approach simplifies manufacturing by using repeated, standardized designs while achieving power level versatility through parallel operation of multiple modules.
Solution Approach 2:
Each power transmitter module is designed with universal characteristics that allow it to function effectively for different mobile device types. This universality reduces per-unit manufacturing cost while the multi-functionality of having multiple such modules provides the needed power level coverage.
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 enables efficient power transmission to mobile devices with different charging needs, reduces manufacturing costs, and maintains optimal efficiency even within restricted frequency ranges, enhancing overall wireless charging performance.
Implementation Method 1
a first power transmitter including first bridge switching elements forming a first bridge circuit, and configured to receive the driving power to transmit a first power
Data Source
AI summary
A wireless power transmitter includes: a power supply configured to supply a driving power; a first power transmitter including first bridge switching elements forming a first bridge circuit, and configured to receive the driving power to transmit a first power, wherein a magnitude of a first input voltage applied to the first bridge circuit is determined by a duty of at least one of the first bridge switching elements; a second power transmitter including second bridge switching elements forming a second bridge circuit, and configured to receive the driving power to transmit a second power, wherein a magnitude of a second input voltage applied to the second bridge circuit is determined by a duty of at least one of the second bridge switching elements; and a controller configured to output first and second power transmitting control signals respectively controlling the first bridge switching elements and the second bridge switching elements.