Temperature Sensor Mounting in Rotating Electric Machine Coils
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Solution Overview
Problem
Existing methods for measuring element wire temperatures in rotating electrical machines, such as turbine electric generators, are limited to machines with thick conductors due to the need for notched grooves or holes, excluding those with thin conductors.
Innovation Solution
The implementation of insulating objects arranged in parallel between element wire conductors to create storage spaces for temperature detection sensors, allowing for the measurement of temperatures in rotating electrical machines with both thick and thin conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a notched depressed groove or hole is formed in the element wire conductors to measure temperature, then temperature measurement is enabled, but the element wire conductor thickness must be at least equal to the sensor height, limiting application to machines with thick conductors
Solution Approach 1:
The patent introduces insulating objects as intermediary elements between the temperature detection sensor and the element wire conductors. These insulating objects create a storage space that accommodates the sensor without requiring modification of the element wire conductors themselves, thereby enabling temperature measurement in conductors of any thickness while maintaining electrical insulation.
Solution Approach 2:
Instead of creating the storage space by removing material from the element wire conductors (one-dimensional approach), the patent utilizes the radial dimension by placing insulating objects between adjacent conductors. This creates a three-dimensional storage space that accommodates the sensor without compromising conductor integrity or requiring minimum conductor thickness.
2Adaptability or versatility
If insulating objects are arranged in parallel between adjacent element wire conductors to form storage spaces, then temperature detection sensors can be stored in these spaces enabling measurement in thin conductors, but the structure becomes more complex
Solution Approach 1:
The insulating objects serve multiple functions simultaneously: they provide electrical insulation between adjacent element wire conductors, create storage spaces for temperature detection sensors, and maintain the structural integrity of the coil. This multi-functionality reduces the need for separate components and simplifies the overall structure despite the added capability.
Solution Approach 2:
The patent merges the insulation function and the sensor mounting function into a single integrated structure. The insulating objects that are already necessary for electrical isolation between conductors are designed to also form the storage spaces for sensors, combining two previously separate requirements into one unified solution.
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 enables the extensive application of element wire temperature measurement sensors to a wider range of rotating electrical machines, including those with thin conductors, by forming storage spaces between insulating objects and conductors, thereby enhancing the types of machines that can utilize these sensors.
Implementation Method 1
temperature detection sensors configured to detect temperatures of the element wire conductors and stored in the storage spaces
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3
AI summary
A rotating electrical machine including a coil formed of collective conductors (6) which are composed of a plurality of layers of element wire conductors (3, 3, ...), formed of rectangular conductors stacked in a radial direction of the rotating electrical machine, including: insulating objects (2) arranged in parallel between adjacent element wire conductors (3) of a plurality of the element wire conductors (3, 3)in a circumferential direction of the rotating electrical machine and extending along the adjacent element wire conductors (3); a storage space (123) formed between the insulating objects (2) arranged in parallel; and a temperature detection sensor stored in the storage space (123), whereby the types of the rotating electrical machine to which the temperature detection sensor can be applied may be extensively increased.