Dominant Power Receiving Unit Selection for Wireless Charging
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Solution Overview
Problem
Wireless charging systems face challenges in efficiently managing power delivery to multiple devices with varying power requirements, as the current variation in the power transmitting unit's coil affects voltage at power receiving units differently based on device size, location, and internal components, making it difficult to optimize power distribution among devices of different categories.
Innovation Solution
The system selects a dominant power receiving unit based on criteria such as temperature, current, and voltage gap, using communication protocols like Bluetooth Low Energy to adjust the coil current and ensure optimal power delivery by determining the PRU's category information and adjusting the coil current to maintain the rectifier voltage within a specific range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single coil current is used to charge multiple devices, then the system is simple to operate, but power delivery cannot be optimized for devices with varying power requirements
Solution Approach 1:
The patent segments the power delivery control by selecting a dominant PRU whose power requirements determine the coil current settings. Instead of treating all PRUs equally, the system divides them into categories based on power needs and selects one representative (dominant PRU) to control the overall power delivery, enabling optimized power distribution while maintaining simple operation.
2Power
If coil current is adjusted to meet high power requirements, then power delivery to high-power devices is improved, but voltage at low-power receiving units becomes excessive
Solution Approach 1:
The patent changes the operating parameters by adjusting the coil current based on the dominant PRU's category and power requirements. The system modifies the current magnitude dynamically selected from predefined levels, ensuring that the voltage and power delivered are appropriate for the dominant device's needs without being excessive for other devices in the charging area.
3Productivity
If different coil currents are used for different device categories, then power delivery is optimized, but system complexity increases
Solution Approach 1:
The patent introduces dynamic adjustment of coil current based on real-time detection of PRU categories and dominant PRU selection. The system dynamically switches between different current levels and configurations depending on which PRU is identified as dominant, enabling optimized power delivery for varying device categories while managing complexity through automated detection and selection algorithms.
4Adaptability or versatility
If power is delivered to multiple devices simultaneously, then system versatility is improved, but difficulty in optimizing power distribution increases
Solution Approach 1:
The patent extracts the power optimization problem from the complexity of managing multiple devices by selecting a single dominant PRU to represent the charging needs. The system takes out the dominant device's requirements as the controlling factor, simplifying the optimization task while still serving multiple devices through the established coil current settings that accommodate the dominant PRU's category.
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 maximizes the selection efficiency of the dominant power receiving unit, ensuring consistent and optimized power delivery to devices by accounting for their specific requirements, thereby improving system efficiency and meeting power, voltage, and temperature standards.
Implementation Method 1
Wireless charging or inductive charging uses a magnetic field to transfer energy between devices. Power is delivered through non-radiative, near field, magnetic resonance from a power transmitting unit (PTU) to a power receiving unit (PRU).
Implementation Method 2
All of the PRUs that are placed in this magnetic field convert the magnetic field into a voltage that is used for powering the device or charging the battery.
Data Source
AI summary
This disclosure describes systems, methods, and apparatus related to dominant power receiving unit selection. A device may determine a presence of a first device of one or more devices on a charging area of the device, the charging area including a power transmitting surface. The device may establish a connection with the first device using one or more communication protocols. The device may identify one or more parameters associated with the first device using the established connection. The device may determine that the first device is a dominant device based at least in part on the one or more parameters.