Expandable Container for Stator Coil Spacing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for creating spacing between insulated coils in AC induction motors, such as using z-bars, can lead to damaged insulation and safety concerns due to manual operation and excessive torque, making it difficult to handle large coil end portions effectively.
Innovation Solution
A spacing device comprising an expandable container, a regulator, and a measuring device is used to create space between insulated stator coil end portions by inflating the container to exert pressure and then placing insulating elements, reducing the risk of damage and operator strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual tools like z-bars are used to create spacing between coils, then coil-to-coil clearance can be achieved, but insulation damage and operator safety issues occur due to excessive torque and pressure points
Solution Approach 1:
The patent employs a pneumatic balloon device that inflates with air or gas to create spacing between coil end portions. The balloon expands uniformly within the stator slot, applying distributed pressure rather than concentrated force, thereby achieving the necessary coil-to-coil clearance while preventing insulation damage that would result from manual tool pressure points
Solution Approach 2:
The invention replaces the manual mechanical z-bar tool with an automated pneumatic system. Instead of manually applying torque with a rigid bar that creates harmful pressure points, the system uses inflatable balloon elements that automatically expand to provide uniform spacing, eliminating operator strain and preventing coil insulation damage
2Manufacturing precision
If manual z-bar tools are used to separate coils, then spacing can be created, but operator fatigue and safety concerns arise from repeated torque application
Solution Approach 1:
The pneumatic balloon device is self-actuating through inflation. Once positioned in the stator slot between coil end portions, the balloon automatically expands when air or gas is supplied, creating the necessary spacing without requiring repeated manual torque application. The operator simply needs to inflate the balloon rather than continuously apply mechanical force
Solution Approach 2:
The system uses pneumatic pressure to automatically separate and space the coil end portions. The inflatable balloon elements expand under air or gas pressure, providing consistent and controlled spacing forces that eliminate operator fatigue associated with manual tool operation
3Reliability
If larger coil end portions are used in high voltage motors, then electrical isolation requirements are met, but handling difficulty increases due to size and weight
Solution Approach 1:
The pneumatic balloon device provides a mechanical advantage for handling large coil end portions. By inflating the balloon, the system generates sufficient force to separate and position heavy coils without requiring manual lifting or twisting, making the handling of large high-voltage motor coils safe and efficient
Solution Approach 2:
The inflatable balloon acts as an intermediary tool between the operator and the large coil end portions. Instead of directly manipulating heavy coils, the operator inflates the balloon which then expands to push the coils apart and create proper spacing, reducing direct physical contact and handling difficulty
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 solution provides a safer and more efficient method for creating coil-to-coil clearance with minimal damage to the insulation and reduced operator fatigue, ensuring proper electrical isolation and improved stator performance.
Implementation Method 1
expanding the expandable container between the coil end portions to a second height thereby creating a space between the coil end portions
Data Source
AI summary
Methods and system for creating spacing between insulated stator coils include a spacing device with an expandable container. The expandable container is positioned and expanded between stator coil end portions in order to create a space between the insulated stator coil end portions. Insulating elements are placed in the space created between the stator coil end portions, and the expandable container removed.