Weaving Machine Selection Device Magnetic Pole Design
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Solution Overview
Problem
Existing shed-forming devices for weaving machines face challenges in reducing electrical power consumption, increasing speed of response, and minimizing footprint while maintaining reliability and efficiency, due to limitations in magnetic field design and material selection.
Innovation Solution
A selection device with a magnetically influenceable zone extending in the longitudinal direction of the positionable part over a shorter distance than the coil length, where magnetic force is exerted, and a holding distance that allows for a larger moment of force with reduced electrical energy consumption, using a combination of magnetic pole design and material optimization to enhance efficiency and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the coil length is reduced to minimize footprint, then the footprint is reduced, but the electrical power consumption increases and the speed of response decreases
Solution Approach 1:
The patent applies local quality by concentrating the magnetic field generation at the pole ends rather than distributing it along the entire coil length. The poles are positioned such that their ends create concentrated magnetic fields at specific locations, allowing the magnetically influenceable zone to be shorter than the coil length. This localized magnetic field concentration enables reduced footprint while maintaining effective magnetic force generation with lower power consumption.
Solution Approach 2:
The patent transitions from a one-dimensional coil length metric to a two-dimensional spatial arrangement by positioning poles at specific locations along the coil. The magnetically influenceable zone length is determined by pole positioning rather than coil length, allowing independent optimization of footprint (coil dimensions) and magnetic field effectiveness (pole positioning). This dimensional separation enables the zone length to be shorter than the coil length.
2Speed
If the coil length is reduced to increase speed of response, then the speed of response improves, but the electrical power consumption increases
Solution Approach 1:
The patent uses local quality by positioning poles to create concentrated magnetic fields at specific locations rather than distributing the field along the entire coil. This localized field concentration reduces the magnetically influenceable zone length, enabling faster response times. The concentrated magnetic force acts more rapidly on the selection element, improving speed of response while the efficient pole design minimizes power consumption.
3Use of energy by moving object
If the magnetically influenceable zone length is reduced, then the electrical power consumption decreases, but the magnetic force effectiveness may be compromised
Solution Approach 1:
The patent applies local quality by concentrating magnetic field generation at the pole ends rather than distributing it along the coil length. The poles are positioned to create intense localized magnetic fields that exert sufficient force on the selection element within a shorter magnetically influenceable zone. This localized concentration maintains magnetic force effectiveness while reducing the zone length and power consumption.
Solution Approach 2:
The patent employs composite construction with a ferromagnetic core and pole structures that concentrate and direct the magnetic field. This composite design enhances the magnetic field intensity at the pole ends, ensuring sufficient magnetic force is generated within the shortened influenceable zone while maintaining energy efficiency.
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 achieves a significant reduction in electrical power required, improved speed of response, and a smaller footprint, while maintaining reliability and efficiency, by optimizing the magnetic field and material usage in the selection device.
Implementation Method 1
an electromagnetic selector with a coil wound around a fixed core and at least two poles connected to this core designed to form at least one magnetic north pole and at least one magnetic south pole
Implementation Method 2
the selector can be controlled in order to exert a magnetic force with each pole situated next to the selection element on this zone so as to place or keep the positionable part in a selection position or a non-selection position
Data Source
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AI summary
The present invention relates to a selection device for a shed-forming device of a weaving machine having an electromagnetic selector (11) with at least two poles (P1), (P2),.... (Pn) and a selection element (1), (2); (25), (26); (40), (41) which is located in a cooperating position with a zone (50) alongside at least two poles (P1), (P2),... (Pn) and is retained at a holding distance (A) from this zone (50), in which the selector (11) with each adjacent pole (P1), (P2) can exert a magnetic force on the zone (50), and in which the zone (50) extends over a distance (Z) that is shorter than the coil length (S), while the holding distance (A) is at least equal to half the positionable length (L) of the selection element.