Stringed Solenoid Drives Pre-magnetization Magnetic Leakage
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Solution Overview
Problem
Magnetic flux leakage between closely spaced solenoid valves leads to energy losses and unintended switching, as magnetic circuits influence each other undesirably, requiring higher voltage or rendering some valves inoperable.
Innovation Solution
The implementation of pre-magnetization with the same polarity and strength in adjacent magnetic circuits, using permanent magnets or base current, to minimize magnetic potential differences and reduce stray flux, ensuring reliable switching with minimal energy expenditure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If solenoid valves are arranged closely next to one another to minimize external dimensions, then space utilization is improved, but magnetic flux leakage between adjacent magnetic circuits increases causing energy losses and unintended switching
Solution Approach 1:
Magnetic shielding elements are introduced as intermediary components between adjacent magnetic circuits. These shielding elements act as mediators that redirect and contain the magnetic flux within each valve's own magnetic circuit, preventing flux from leaking into neighboring valves. The shielding elements are positioned strategically to block magnetic field lines from crossing between adjacent valves, thus eliminating the harmful interaction while maintaining close spacing.
Solution Approach 2:
The magnetic circuit of each solenoid valve is segmented into distinct magnetic zones using shielding elements. This segmentation creates separate magnetic pathways for each valve, ensuring that the magnetic flux generated by one valve remains confined to its own magnetic circuit. The segmentation is achieved by introducing magnetic shields that divide the space between adjacent valves into isolated magnetic domains, preventing flux cross-contamination.
2Area of stationary object
If solenoid valves are arranged closely next to one another, then space utilization is improved, but unintended switching of neighboring valves occurs due to magnetic circuit influence
Solution Approach 1:
Magnetic shielding elements serve as intermediaries that block the magnetic field influence between adjacent valves. When one valve is actuated, the shielding elements prevent its magnetic flux from reaching neighboring valves, thereby eliminating the risk of unintended switching. The shields are positioned to create magnetic field barriers that maintain reliable operation even when valves are closely spaced.
Solution Approach 2:
The magnetic shielding elements convert the potentially harmful magnetic flux that would otherwise cause unintended switching into a beneficial contained field. By redirecting the flux through the shielding elements back into the originating valve's magnetic circuit, the design transforms what would be interference into a self-contained magnetic pathway, ensuring that magnetic energy serves only its intended function.
3Volume of moving object
If solenoid valves are arranged closely next to one another, then space utilization is improved, but higher voltage is required for switching due to increased magnetic potential difference
Solution Approach 1:
Magnetic shielding elements act as intermediaries that maintain stable magnetic potential differences between adjacent valves. By preventing flux leakage and magnetic circuit interaction, the shields ensure that the magnetic potential difference required for switching remains at its designed value, without being artificially increased by neighboring valve influences. This allows normal switching voltage to be used even in closely spaced arrangements.
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 approach effectively reduces magnetic stray fields and energy losses, allowing for reliable operation of closely spaced magnetic valves with reduced energy consumption and preventing unintended switching.
Implementation Method 1
The magnetic circuits of adjacent magnetic drives have a pre-magnetization with the same polarity and at least approximately the same strength
Implementation Method 2
The pre-magnetization can be done with permanent magnets or by applying a base current of a fraction of the normal excitation current to the field windings
Implementation Method 3
Magnetic flux does not remain within a device, but instead flows away via neighboring, magnetically conductive metal parts with no effect on this device
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The invention relates to an arrangement of stringed solenoid drives (1, 2, 3), particularly for solenoid valves, wherein each solenoid drive comprises a magnetic circuit with a yoke (4), moveable armature (5), and an excitation coil (6) arranged on the yoke. The magnetic circuits of neighboring solenoid drives have pre-magnetization with the same polarity and at least approximately the same strength. Due to the pre-magnetization, the magnetic potential difference between neighboring magnetic circuits is reduced. The pre-magnetization is thus carried out with the same polarity as the excitation by current flow in the excitation coil.