Wireless PV Power Transfer With MPPT for Stable Charging
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Solution Overview
Problem
Existing wireless power designs for photovoltaic (PV) power sources are unstable due to inconsistencies in light exposure, limiting their use in wireless power transfer applications.
Innovation Solution
A wireless photovoltaic power system that combines photovoltaic cell units with a wireless power device featuring a coil for magnetic field-based power transfer, incorporating maximum power point tracking (MPPT) and power control to stabilize energy transfer, allowing for efficient charging of batteries and optimal power utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PV power sources are used for wireless power transfer, then wireless power capability is achieved, but stability deteriorates due to light inconsistency
Solution Approach 1:
The patent introduces a wireless power transmission system as an intermediary between the PV power source and the load. This intermediary includes a transmission device with a coil that converts unstable PV output into controlled wireless power transfer, isolating the load from light inconsistency variations and stabilizing power delivery despite variable solar input
Solution Approach 2:
The patent implements feedback control through a controller that monitors the power output from PV cells and adjusts the wireless power transmission accordingly. The controller receives information about power availability and modulates the transmission coil operation to maintain stable power transfer, compensating for fluctuations caused by varying light conditions
2Productivity
If maximum power point tracking and power control are combined, then power transfer efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges the maximum power point tracking (MPPT) function and the power control function into a single integrated wireless power transmission system. The controller performs both MPPT to extract maximum power from PV cells and simultaneous power control for wireless transmission, combining multiple functions into one unified device rather than separate systems
Solution Approach 2:
The wireless power transmission device is designed with multi-functionality, serving as both an MPPT controller and a power management system. The single controller handles multiple tasks including tracking maximum power point, regulating power output, and managing wireless transmission, making one component perform several critical functions to reduce overall system complexity despite the advanced control requirements
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 stable and efficient wireless power transfer by implementing MPPT and constant current/constant voltage (CCCV) charging, allowing multiple PV cells to be connected with minimal hardware overhead, optimizing power transfer and battery charging efficiency.
Implementation Method 1
The first wireless power device includes a coil that provides a magnetic field to wirelessly transfer the power to a second wireless power device
Implementation Method 2
PV power sources are electronic devices that produce electric current at a junction of two substances exposed to light (i.e., convert light into electricity)
Data Source
AI summary
A wireless photovoltaic power system is provided. The wireless photovoltaic power system includes photovoltaic cell units that provide power. Each of the photovoltaic cell units include a photovoltaic cell. The wireless photovoltaic power system includes a first wireless power device that receives the power. The first wireless power device includes a coil that provides a magnetic field to wirelessly transfer the power to a second wireless power device. The first wireless power device provides a combinational implementation of a maximum power point tracking of the photovoltaic cell units and a power control of a load.