Solar Power Extraction Circuit Using Resistor Selection
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Solution Overview
Problem
Existing solar battery power extraction devices require complex configurations, including voltmeters and ammeters, to adjust output voltage and current for maximum power extraction, which is inefficient and costly.
Innovation Solution
A maximum power extraction device that uses a voltage control unit with resistors and a switching unit to adjust operating voltage based on a compare signal, and a maximum power control unit that measures operations to select the appropriate resistor for optimal power output without the need for voltmeters or ammeters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a DC-DC converter with voltmeter and ammeter is used to control voltage and current for maximum power extraction, then the power extraction accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent extracts and removes the voltmeter and ammeter from the maximum power extraction system. Instead of using these traditional measurement devices, the invention uses a simplified control unit that directly controls the switching element based on the solar battery's electrical characteristics, eliminating the need for separate measurement instruments and reducing device complexity while maintaining power extraction accuracy
Solution Approach 2:
The control unit in the patent performs multiple functions: it controls the switching element to regulate current, measures the solar battery's electrical characteristics, and adjusts the operating point for maximum power extraction. This multi-functional approach replaces the separate voltmeter and ammeter, reducing the number of components while maintaining measurement and control capabilities
2Productivity
If the direction of solar battery is changed to adjust the angle of solar light, then the power generation efficiency is improved, but the power consumption increases
Solution Approach 1:
Instead of physically changing the direction of the solar battery to optimize light angle, the patent changes the electrical parameters (voltage and current) of the solar battery through electronic control of the switching element. This parameter-based approach achieves optimal power extraction without the mechanical movement and associated power consumption required for physical repositioning
3Measurement precision
If an ammeter is used to measure current for maximum power extraction, then the current measurement accuracy is improved, but the device complexity and cost increase
Solution Approach 1:
The patent removes the ammeter from the system by implementing current measurement functionality directly within the control unit. The control unit measures the current flowing through the solar battery and uses this information to adjust the switching element, eliminating the need for a separate ammeter and reducing device complexity
Solution Approach 2:
The control unit merges multiple functions into a single device: it controls the switching element, measures electrical characteristics including current, and adjusts the operating point for maximum power extraction. This consolidation replaces separate measurement devices like ammeters, reducing complexity while maintaining measurement accuracy
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 solution simplifies the configuration, allowing for efficient adjustment of output power by counting operations to determine the optimal resistor selection, thereby maximizing power extraction from solar batteries without the need for complex measurement devices, reducing costs and complexity.
Implementation Method 1
a battery; wherein the battery receives solar energy and converts the received solar energy into electrical energy
Data Source
AI summary
Provided is a maximum power extraction devices including: a battery; a voltage control unit adjusting a size of a first power outputted from the battery according to a resistor selected from a plurality of resistors, and generating a compare signal according to a size difference between an operating voltage adjusting the size of the first power depending on the selected resistor and a reference voltage; a switching unit connected between the battery and a load and adjusting a size of the operating voltage according to a size difference of the compare signal in response to first and second switching control signals; a switching control unit generating the first and second switching control signals to allow a size between the operating voltage according to the compare signal and the reference voltage to be within an error range; and a maximum power control unit measuring the number of first operations obtained by counting the occurrence number of the first or second switching control signals for a predetermined time, when the compare signal is within the error range.