Winding Switch Structure for Sliding-Less Contact Switching
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Solution Overview
Problem
Existing winding switching devices face issues with wear and contact resistance due to sliding contact points, which reduces reliability and lifespan.
Innovation Solution
A switch design featuring a movable shaft and movable segments that allow for sliding-less switching by changing contact points' positions, reducing wear and contact resistance through a spring-biased mechanism that separates contact points during switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contact points are pressed against each other with spring repulsive force to reduce contact resistance, then contact resistance is reduced, but sliding part wear increases when contact points are switched
Solution Approach 1:
The patent replaces the traditional mechanical sliding contact system with a magnetic field-based switching system. Instead of physical contact points sliding against each other, the invention uses magnetic fields to induce currents and switch connections, eliminating mechanical wear while maintaining electrical connectivity. This is achieved through movable conductors that move through magnetic fields generated by magnets, creating electromagnetic induction effects that enable switching without direct mechanical contact between stationary and moving parts.
2Ease of operation
If sliding contact switching is used to change connection states, then switching function is achieved, but wear occurs reducing reliability and lifespan
Solution Approach 1:
The invention substitutes mechanical sliding contact with electromagnetic induction-based switching. Movable conductors carrying currents move through magnetic fields to change connection states without physical contact between switching surfaces. This eliminates wear while preserving the switching function, significantly improving reliability and lifespan of the switching device.
Solution Approach 2:
The patent introduces magnetic fields as an intermediary medium to enable switching without direct mechanical contact. The magnetic field acts as a mediator between the stationary magnets and movable conductors, transferring energy and enabling connection state changes through electromagnetic induction rather than direct mechanical interaction, thus preventing wear.
3Stability of the object's composition
If contact points remain in contact during switching to maintain connection, then connection continuity is maintained, but sliding wear increases
Solution Approach 1:
The patent replaces mechanical contact-based connection continuity with electromagnetic field-based continuity. Currents are maintained through movable conductors moving through magnetic fields, enabling connection continuity without sustained mechanical contact. This eliminates material wear while preserving electrical connection stability throughout the switching operation.
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 wear and contact resistance, enhancing the reliability and lifespan of the switch while maintaining efficient electrical connections, improving inverter efficiency and energy consumption in electric vehicle motors.
Implementation Method 1
a movable segment that is connected to two of the plurality of movers and biases the two movers in a direction in which the two movers are away from each other
Data Source
AI summary
High reliability and long life are achieved by being sliding-less.The switch according to the present invention includes: first terminal and a second terminal that are adjacently attached to a stator; a movable shaft movable in a first direction and a second direction, a plurality of movers attached to the movable shaft; and a movable segment that is connected to two of the plurality of movers and biases the two movers in a direction in which they are away from each other. The switch is capable of switching among: a first mode in which when the movers move in the first direction, the mover is pushed by the stator to deform the movable segment so as to protrude toward the terminal, and the movable segment comes into contact with the first terminal; an intermediate mode in which deformation of the movable segment by the movers is released, and the movable segment is in contact with neither the first terminal nor the second terminal; and a second mode in which when the movers move in the second direction, the mover is pushed by the stator to deform the movable segment so as to protrude toward the terminal, and the movable segment comes into contact with the second terminal.