Generator Field Upgrade Kit for High Cyclic Duty
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Solution Overview
Problem
High cyclic duty generators experience increased fatigue, wear, and performance degradation due to frequent starting and stopping, leading to larger loads, temperatures, and VAR swings, which results in reduced lifespan and efficiency.
Innovation Solution
A generator field upgrade kit with a design modification package that includes copper coils with high silver content, mechanically hardened turns, enhanced cooling mechanisms, and selective bonding and machining to mitigate damage from cyclic loads and thermal expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If generators operate with increased cycling and frequent starting/stopping, then power generation flexibility and responsiveness improve, but generator fatigue and wear increase
Solution Approach 1:
The patent changes the material parameters of the field windings by using copper coils with high silver content (at least 15 ounces of silver per ton) instead of conventional copper. This material parameter change increases resistance to fatigue and stress relaxation, allowing the generator to withstand increased cycling operations while maintaining reliability.
Solution Approach 2:
The patent creates a composite material structure by combining copper coils with high silver content and mechanically hardening the copper. This composite approach leverages the benefits of both materials - the electrical conductivity of copper and the fatigue resistance provided by silver content and mechanical hardening - to resolve the contradiction between cycling adaptability and fatigue resistance.
2Reliability
If field windings are made with conventional copper coils, then manufacturing cost is reduced, but resistance to fatigue and stress relaxation deteriorates
Solution Approach 1:
The patent modifies the material composition parameter by specifying copper coils with high silver content (at least 15 ounces of silver per ton). This parameter change enhances fatigue and stress relaxation resistance while maintaining compatibility with conventional manufacturing processes, thus resolving the contradiction between reliability and ease of manufacture.
Solution Approach 2:
The patent applies mechanical hardening to the copper coils during the manufacturing process before installation. This preliminary action of pre-hardening the copper coils ensures enhanced fatigue resistance is built into the component during manufacturing, avoiding the need for complex post-installation treatments and maintaining ease of manufacture.
3Reliability
If standard cooling mechanisms are used, then device complexity is minimized, but ability to withstand thermal loading during cyclic operation deteriorates
Solution Approach 1:
The patent enhances the cooling mechanism by modifying its operational parameters - specifically by controlling cooling water flow rate and temperature to optimize heat removal during cyclic operation. This parameter-based approach improves thermal loading resistance without requiring complex structural modifications to the cooling system.
Solution Approach 2:
The patent implements dynamic cooling control that adjusts cooling water flow and temperature based on the generator's operational state during cycling. This dynamic approach allows the standard cooling mechanism to adapt to varying thermal loads, improving thermal resistance while maintaining simplicity.
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 upgrade kit extends the lifespan of generator components by 2 to 10 times, reducing downtime and improving overall performance by minimizing fatigue and thermal loading, thereby enhancing the generator's ability to withstand cycles.
Implementation Method 1
an enhanced cooling mechanism as a replacement or supplement to an original cooling mechanism of the generator field
Data Source
AI summary
In certain exemplary embodiments, a generator field upgrade kit includes a design modification package configured to be installed in a generator field of a generator as a retrofit to mitigate damage of the generator field due to high cyclic duty of the generator. The design modification package includes a plurality of individual modifications that are selectable based on specific operational and performance parameters of the generator.