Rotor Winding Lead Conductor Stabilization Against Centrifugal Force
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Solution Overview
Problem
In electric rotating machines, such as generator motors, excessive centrifugal forces often displace lead conductors, leading to potential damage to insulation and connection breakage at the connecting portions.
Innovation Solution
A clamp ring with a pressurizing portion and winding holding portion is used to secure the rotor winding, featuring a lead conductor penetrating portion and a stopper on the inner diameter side, along with a centrifugal force-resistant member to mitigate displacement and maintain stable connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lead conductor is brought out from the end of the rotor winding that overhangs from the rotor core and led to the inner diameter, then the lead conductor can be wired to a predetermined portion, but excessive centrifugal force acts on the lead conductor and displaces it in the outer diameter direction, damaging insulation or breaking connections
Solution Approach 1:
The clamp ring is divided into distinct functional portions: a pressurizing portion that contacts the rotor core, a winding holding portion that secures the rotor winding, and a lead conductor penetrating portion that guides the lead conductor. This segmentation allows each portion to perform its specific function effectively, preventing displacement while maintaining wiring accessibility
Solution Approach 2:
The clamp ring acts as an intermediary component between the rotor core, rotor winding, and lead conductor. It provides a structured interface that secures the lead conductor at multiple points (through the penetrating portion and via the winding holding portion), preventing direct displacement while allowing controlled wiring operations
2Reliability
If the lead conductor is secured to prevent displacement, then connection stability is maintained, but the structure becomes more complex with additional components like clamp rings and stoppers
Solution Approach 1:
Multiple functions are merged into a single clamp ring component: the pressurizing portion, winding holding portion, and lead conductor penetrating portion are all integrated into one piece. This consolidation provides effective lead conductor securing while avoiding the need for multiple separate components, thereby reducing overall structural complexity
Solution Approach 2:
The clamp ring serves multiple functions simultaneously: it pressurizes the rotor core in the stacking direction, holds the rotor winding that overhangs from the rotor core, and provides a penetrating portion for the lead conductor. This multi-functionality reduces the need for additional dedicated components, simplifying the overall structure
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 effectively reduces lead conductor displacement and maintains stable connections even under excessive centrifugal forces, preventing insulation damage and connection breakage.
Implementation Method 1
an excessive centrifugal force often acts on the lead conductor from the end of the rotor winding and displaces the whole lead conductor in the outer diameter direction
Data Source
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AI summary
A lead conductor penetrating portion (18, 18H) that bring out lead conductors to the inner diameter side is formed in a winding holding portion (14) of a clamp ring (12A) for holding a rotor winding (6, 6U, 6D) that overhangs from a rotor core (5), and furthermore a stopper (20) is formed in a lead portion on the inner diameter side of the lead conductor (19, 19A, 19B), and a centrifugal force-resistant member (24) for holding a centrifugal force acting on the lead conductor (19, 19A, 19B) is interposed between the stopper (20) and the inner diameter side of the winding holding portion (14).