Wind Turbine Generator Stator Grain-Oriented Lamination
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Solution Overview
Problem
Wind turbine generators face issues with high costs and complexity due to the need for gearboxes in high-speed generators and the challenges of transporting and replacing large, heavy low-speed direct-drive generators, which also affect power efficiency and reliability.
Innovation Solution
A wind turbine generator system utilizing a gearbox to increase rotational speed, featuring a stator with grain-oriented iron laminations for reduced iron losses and a rotor with magnetic components, including permanent magnets, to enhance efficiency and reduce size, making transportation and maintenance more manageable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a gearbox is used to increase rotational speed for high-speed generators, then power efficiency is improved, but device complexity and cost increase due to gearbox failures
Solution Approach 1:
The patent extracts the gearbox from the system by using a direct-drive generator design where the generator is directly coupled to the wind turbine rotor without any intermediate speed-increasing mechanism. This eliminates the gearbox and its associated complexity and failure points while maintaining high power efficiency through optimized generator design.
Solution Approach 2:
The patent changes the operating parameters by using permanent magnets in the generator rotor to enable direct-drive operation at low rotational speeds while maintaining high efficiency. This allows the generator to operate effectively without the speed multiplication that would require a gearbox.
2Device complexity
If low-speed direct-drive generators are used to eliminate gearboxes, then device complexity is reduced, but weight and transportation difficulty increase
Solution Approach 1:
The patent uses composite construction methods and optimized material selection in the generator design to reduce weight while maintaining structural integrity and magnetic performance. The use of permanent magnets and optimized stator-rotor configurations allows for lighter construction compared to traditional high-speed generators.
Solution Approach 2:
The patent applies local quality optimization by using grain-oriented steel sheets in the stator with specific magnetic properties in critical areas, and strategically placing permanent magnets in the rotor. This localized optimization reduces the overall amount of material needed while maintaining generator performance, thereby reducing weight.
3Loss of energy
If grain-oriented steel sheets are used in the generator stator, then power efficiency is improved through reduced iron losses, but manufacturing cost increases
Solution Approach 1:
The patent changes the material parameter by using grain-oriented steel sheets with optimized magnetic properties in the generator stator. This material selection reduces iron losses and improves power efficiency. The patent balances this increased material cost against the operational benefits of reduced energy losses and lower maintenance 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
The system achieves improved power efficiency and reduced maintenance costs by minimizing iron losses and heat generation, extending the life of magnetic components and simplifying transportation and replacement processes.
Implementation Method 1
at least part of the generator stator contains metal having directional magnetic properties
Implementation Method 2
a generator for generating electric power, comprising a generator stator comprising at least two poles, where each pole is provided with windings of wire, and a generator rotor comprising at least two magnetic components
Implementation Method 3
a generator rotor comprising at least two magnetic components, where at least part of the generator stator contains metal having directional magnetic properties
Data Source
AI summary
The present invention relates to a wind turbine for generating electric power. The wind turbine includes a generator (105) and a wind turbine rotor (101) for driving the generator (105). The generator includes a generator stator (201) having at least two stator poles (203), and a generator rotor (210) comprising at least two magnetic components (211). At least part of the generator stator (201) contains metal having directional magnetic properties. The generator (105) is connected to the wind turbine rotor (101) via a gearbox (103), in order to increase the rotational speed of the generator (105) in comparison with the rotational speed of the wind turbine rotor (101).