Split Magnetic Pole Layout for Precise Steel Plate Lifting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lifting magnets in steel mills face inefficiencies when lifting thin steel materials, as they often attract unnecessary plates due to magnetic flux saturation, leading to reduced work efficiency and challenges in automating crane operations, particularly due to difficulties in controlling the number of plates lifted and varying magnetic characteristics of steel materials.
Innovation Solution
A lifting-magnet attachment magnetic pole unit with split magnetic poles, where the inner and outer poles are branched to distribute magnetic flux evenly, preventing saturation and allowing precise control over the number of plates lifted by adjusting the magnetic field circuit, thereby maintaining lifting force and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a large magnetic flux is applied from one point to lift thin steel materials, then the lifting force is sufficient, but magnetic flux saturation occurs in the uppermost piece causing unnecessary plates to be attracted
Solution Approach 1:
The magnetic pole is divided into multiple segmented poles arranged in an array. Each segmented pole independently applies magnetic flux to a specific region of the steel material, preventing magnetic flux saturation in any single location and enabling precise control over which plates are attracted without unnecessarily attracting additional plates underneath.
2Ease of operation
If current control is used to adjust the number of plates attracted, then the number of plates can be controlled, but the operation requires significant operator skill and reduces work efficiency
Solution Approach 1:
Different regions of the magnetic pole have different local properties through the segmented pole configuration. Each segmented pole can be independently controlled or has different magnetic characteristics, allowing localized adjustment of magnetic flux distribution. This enables automatic control systems to precisely determine and control the number of plates to be attracted without requiring operator skill for current adjustment.
3Force
If a single large coil is used to produce sufficient magnetic flux, then the lifting force is adequate, but the coil generates significant heat and consumes high power
Solution Approach 1:
The single large coil is replaced with multiple smaller coils, each associated with a segmented pole. This distributes the power consumption and heat generation across multiple smaller coils rather than concentrating it in one large coil, reducing the thermal load on any single coil while maintaining the total magnetic flux output required for lifting.
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 prevents magnetic flux saturation in thin steel materials, enabling accurate control over the number of plates lifted, even when stacked, and maintains the lifting force and power efficiency comparable to traditional magnets, while avoiding weight and heat generation issues.
Implementation Method 1
an iron core (inner pole) 101 is mounted inside the coil 103 and a yoke (outer pole) 102 for transmitting a magnetic field is mounted outside the coil 103. By bringing the inner pole 101 and the outer pole 102 into contact with a steel material, with the coil 103 being in an energized state, a magnetic field circuit is formed
Implementation Method 2
A lifting-magnet attachment magnetic pole unit with split magnetic poles, where the inner and outer poles are branched to distribute magnetic flux evenly, preventing saturation
Data Source
Figure 1(A)~1(B)
Figure 2(A)~2(B)
Figure 3
AI summary
An object is to provide a lifting-magnet attachment magnetic pole unit, a lifting magnet, a steel material conveying method, and a steel plate manufacturing method with which only one or a desired pieces of steel materials can be held. The present invention is a lifting-magnet attachment magnetic pole unit for a lifting magnet used to lift and convey a steel material with magnetic force. The lifting-magnet attachment magnetic pole unit includes a first split magnetic pole that is in contact with an iron core of the lifting magnet and has a branched structure, and a second split magnetic pole that is in contact with a yoke of the lifting magnet and has a branched structure. The first and second split magnetic poles are alternately arranged.