Wireless Power Efficiency Tracking via Dynamic Parameter Control
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Solution Overview
Problem
Current wireless power systems do not maximize overall efficiency, as they rely on fixed operating parameters and focus on coil design and component selection rather than dynamic adjustments to optimize power transfer.
Innovation Solution
The system actively adjusts operating parameters such as operating frequency, VBRG voltage, and VOUT voltage based on real-time feedback from the receiver to minimize coil currents and maximize inductive coupling, using control units to communicate and regulate the power transfer process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If fixed operating parameters are used in wireless power systems, then system simplicity is maintained, but power transfer efficiency is not maximized
Solution Approach 1:
The patent implements dynamic adjustment of operating parameters including frequency, voltage, and current based on real-time feedback from the receiver. The system transitions from fixed parameters to dynamically adjustable parameters, allowing the transmitter to optimize power transfer efficiency by continuously adapting to changing load conditions and coupling states
Solution Approach 2:
The system incorporates a feedback mechanism where the receiver communicates with the transmitter about power transfer conditions. This feedback enables the transmitter to adjust its operating parameters to maximize efficiency, resolving the contradiction between system simplicity and efficiency optimization
2Power
If coil currents are increased to deliver higher power, then power delivery capability is improved, but energy losses increase
Solution Approach 1:
The patent changes operating parameters such as frequency and voltage in addition to current to optimize power transfer. By adjusting multiple parameters simultaneously, the system can deliver high power while minimizing energy losses through optimal parameter combinations rather than relying solely on increased current
3Loss of energy
If dynamic parameter adjustment is implemented to maximize efficiency, then power transfer efficiency is improved, but control system complexity increases
Solution Approach 1:
The control unit performs multiple functions including parameter adjustment, feedback processing, and optimization calculations. This multi-functional approach consolidates complexity into a single controller rather than requiring separate dedicated circuits for each function, managing the complexity increase while achieving efficiency optimization
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 reduces energy losses and increases power transfer efficiency by minimizing transmit and receive coil currents while maintaining high output power delivery.
Implementation Method 1
a transmitter coil that is driven to produce a time-varying magnetic field and a receiver coil that is positioned relative to the transmitter coil to receive the power transmitted in the time-varying magnetic field
Implementation Method 2
A power transmitter (101) inductively transferring power to a power receiver (105) comprises a resonance circuit (201) comprising a transmitter coil (103)
Data Source
Figure 1~2
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Figure 5
AI summary
In a wireless power transfer operation, the operating parameters are adjusted to improve efficiency by reducing the transmit and receive coil currents as follows. First, the transmitter causes the receiver to reduce the receive coil current to the lowest value based on the transmitter/receiver communication while still delivering the same amount of power to the load as before the AC current was adjusted to the minimum value. Then the transmitter may change the operating parameters to increase or preserve the power provided to the receiver without decreasing efficiency or with only small decrease in efficiency, or with increasing the efficiency. For example, the transmitter may increase the VBRG voltage (the DC voltage powering the transmit coil) or the operating frequency to maintain or increase output power levels at lower or the same AC and DC current levels. Other features are also provided.