Counter-rotating Wind Turbine Generator for Low Speed Current
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Solution Overview
Problem
Conventional wind turbines face inefficiencies in current generation at lower wind speeds, as they typically reach maximum energy production at specific structural design speeds and do not effectively utilize wind energy below these thresholds.
Innovation Solution
The implementation of counter-rotation between magnetic elements and electromagnetic coils in a wind-driven generator, where each rotating element is driven by wind blades, enhances relative motion at lower wind speeds, increasing current generation by optimizing the interaction between magnets and coils.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional wind turbines are designed to reach maximum energy production at specific structural design speeds, then high efficiency is achieved at those speeds, but current generation is insufficient at lower wind speeds
Solution Approach 1:
The patent applies counter-rotation between the first rotating element with magnetic elements and the second rotating element with electromagnetic coils. By rotating in opposite directions, the relative motion between magnets and coils is doubled for a given wind speed, effectively allowing current generation at lower wind speeds while maintaining high efficiency at design speeds
2Device complexity
If single rotation direction is used in conventional generators, then structural simplicity is maintained, but relative motion between magnets and coils is limited
Solution Approach 1:
The patent introduces dynamic counter-rotation where both rotating elements can rotate at different speeds and in opposite directions. This dynamic configuration optimizes the relative motion between magnetic elements and electromagnetic coils, enhancing current generation capability while maintaining manageable structural complexity through independent rotation 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
This configuration allows for greater current production at lower wind speeds, providing a significant technical advantage by enabling maximum current generation earlier than traditional designs, thus improving wind turbine functionality.
Implementation Method 1
the first rotating element having magnetic elements disposed thereon that project a magnetic field towards and onto the second rotating element, the second rotating element having electromagnetic coils disposed thereon, the electromagnetic coils being exposed to the magnetic field projected from the first rotating element
Data Source
AI summary
A wind driven generator may have a first rotating element associated with a first set of vanes distributed so as to be driven by wind in a first rotational direction about an axis of rotation. A second element is associated with a second set of vanes distributed so as to be driven by the wind in a second rotational direction opposite to the first rotational direction concentric with the axis of rotation of the first rotating element. The first rotating element has magnetic elements disposed thereon that project a magnetic field towards and onto the second rotating element. The second rotating element has electromagnetic coils disposed thereon, the electromagnetic coils being exposed to the magnetic field projected from the first rotating element.