Modulated Electromagnet Detaches Magnets Without Heat
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Solution Overview
Problem
Existing methods for removing permanent magnets from metal surfaces or moving objects containing metal without physical contact are inefficient, as they require high critical temperatures or direct contact, which are not practical across various fields.
Innovation Solution
A solenoid-based electromagnet system with a driver circuit to generate a modulated magnetic field, allowing for controlled detachment of permanent magnets from metal surfaces and movement of metal-containing objects by creating a torque force that overcomes magnetic attraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating the magnet to a critical temperature is used to remove the magnet from the metal surface, then the magnet loses its magnetic properties and can be removed, but the required temperatures are very high and not practical
Solution Approach 1:
The patent replaces the thermal field (heating) with an electromagnetic field (solenoid-based electromagnet) to achieve magnet removal. The electromagnet generates a modulated magnetic field that creates torque force on the permanent magnet, overcoming magnetic attraction without requiring high temperatures.
Solution Approach 2:
The patent changes the physical parameter from temperature to magnetic field strength and modulation frequency. By modulating the electromagnetic field at specific frequencies, the system creates resonant torque that detaches the magnet, avoiding the need to reach critical temperatures.
2Force
If direct physical contact is used to move objects containing metal, then movement can be achieved, but it requires physical contact which is not practical across various fields
Solution Approach 1:
The patent replaces direct mechanical contact with electromagnetic interaction. The solenoid-based electromagnet generates a modulated magnetic field that exerts torque force on metal-containing objects or permanent magnets, enabling contactless movement and manipulation.
Solution Approach 2:
The patent introduces an electromagnetic field as an intermediary between the electromagnet and the target object. This field mediator transmits force without requiring physical contact, allowing the system to move objects through the magnetic field coupling.
3Strength
If a static magnetic field is used to hold a magnet on a metal surface, then strong magnetic attraction is achieved, but it cannot be easily released without high temperature or physical contact
Solution Approach 1:
The patent transforms the static magnetic field into a dynamic, modulated magnetic field. By varying the frequency and amplitude of the electromagnetic field, the system can easily switch between holding (strong attraction) and releasing (torque-induced detachment) states, simplifying the release mechanism.
Solution Approach 2:
The patent applies periodic modulation to the magnetic field, creating oscillating torque that can overcome static magnetic attraction. The periodic variation in field strength and direction enables controlled release without requiring complex mechanisms or extreme conditions.
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
Effectively detaches permanent magnets from metal surfaces and moves metal-containing objects by generating a modulated magnetic field that interrupts magnetic attraction, enabling gravitational forces to overcome the magnetic hold, thus providing a practical solution for various applications.
Implementation Method 1
a solenoid-based electromagnet for generating a magnetic field and a driver circuit coupled to the solenoid electromagnet for modulating the magnetic field generated by the electromagnet
Implementation Method 2
effecting movement of an object containing a piece of metal and in particular, for removing a permanent magnet from a metal surface
Implementation Method 3
The modulated magnetic field generated by the electromagnet and driver circuit of the present invention exhibits improved control over the direction and projection of the generated magnetic field
Data Source
AI summary
A system comprising a solenoid electromagnet for generating a magnetic field and a driver circuit coupled to the solenoid electromagnet for modulating the magnetic field generated by the solenoid electromagnet. The magnetic field generated by the solenoid electromagnet of the present invention exhibits improved control over the direction and projection of the generated magnetic field. The generated magnetic field has the ability to detach permanent magnets from metal plates, cause motion of permanent magnets and soft magnetic materials as well as create separation between two magnetically bound permanent magnets.