Wireless Power Receiver MCPT Using Stepwise Load Resistance Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Maximum Current Point Tracking (MCPT) control is complex and power-intensive, often requiring sophisticated algorithms, which can reduce the efficiency of power systems, especially in scenarios with limited power capacity, such as wireless power transfer using the microwave system.
Innovation Solution
A power-receiving device with a controller that stepwisely adjusts the resistance value to maintain the output voltage below a predetermined threshold, maximizing the electric current while minimizing power consumption, using a simple configuration that avoids complex components like CPUs and memories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If complex algorithms are used for MCPT control, then the current extraction capability is improved, but the power consumption increases and system efficiency decreases
Solution Approach 1:
The patent extracts only the essential function needed for MCPT control - stepwise resistance adjustment - while removing complex components like CPUs and memories. This extraction approach maintains current extraction capability by preserving the core control mechanism while eliminating power-intensive elements, directly resolving the contradiction between productivity and energy consumption.
Solution Approach 2:
The patent replaces expensive, power-consuming complex control systems with a simple, low-cost resistance adjustment mechanism. This substitution uses basic electronic components that consume minimal power while achieving the same MCPT control objective, effectively addressing the trade-off between current extraction performance and power consumption.
2Measurement precision
If sophisticated algorithms are implemented for MCPT control, then the control precision is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the essential control function from complex algorithms, retaining only the stepwise resistance adjustment mechanism. This simplification maintains control precision by focusing on the fundamental MCPT principle while removing unnecessary computational complexity, directly resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
Instead of using complex algorithms to achieve precision, the patent inverts the approach by using simple resistance stepwise adjustment to achieve the same control precision. This inversion demonstrates that complexity is not necessary for precision, effectively resolving the technical contradiction.
3Device complexity
If simple resistance adjustment is used for MCPT control, then the device complexity is reduced, but the current extraction efficiency may be compromised
Solution Approach 1:
The patent changes the control parameter from complex algorithmic processing to simple resistance value adjustment. By varying the resistance parameter in discrete steps, the system achieves effective MCPT control with minimal complexity, resolving the contradiction between device complexity and current extraction efficiency through parameter-based control.
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
Enables efficient MCPT control with low power consumption, optimizing the operating point for wireless power transfer, even in environments with varying conditions, without the need for high-power-consuming devices.
Implementation Method 1
a rectifier functionally connected to the power-receiving antenna, the rectifier is adapted for converting the electromagnetic waves into DC voltages
Implementation Method 2
a controller functionally connected to the rectifier, the controller is adapted for adjusting a resistance on an output side of the rectifier
Data Source
AI summary
To provide a specific method that is feasible and effective for performing MCPT control with a relatively simple configuration. A power-receiving device for receiving electric power transmitted from a power-transmitting device, based on a wireless power transfer method is provided. The power-receiving device includes: a power-receiving antenna for receiving electromagnetic waves; a rectifier functionally connected to the power-receiving antenna for converting the electromagnetic waves into DC voltages; a controller functionally connected to the rectifier for adjusting a resistance on an output side of the rectifier; and a power storage device for storing an output of the controller. Voltage-current characteristics of the rectifier vary according to a distance between the power-transmitting device and the power-receiving device. The controller is adapted for performing MCPT control by stepwisely changing a resistance value so that a voltage value on the output side of the rectifier is lower than a predetermined threshold value.