As I gear up for a new round of experimenting with a focus on resonance something I might have overlooked from last year's post got my attention and has me thinking I need to move in this direction.
Last year I started off THIS POST with the word Progress? And with that post I experimented with positioning a strong magnet around my coil to observe the effects. In my coil I had an alternating voltage and anyone who has held a permanent magnet up to a coil with a varying current knows that you can feel the magnet pulsate. I paid no attention at the time but my recent readings on mechanical resonance and magnetic fields has me wondering if we are all overlooking something very simple.
Hear me out, this is based on research, and testing. We know what happens when we hold a permanent magnet to an oscillating magnetic field. A magnet vibrates near an alternating voltage source due to the changing magnetic field produced by the alternating current (AC) in the source and the changing magnetic field exerts a force on the magnet. This force varies in direction and magnitude, depending on the strength and orientation of the magnetic field relative to the magnet.
As the AC magnetic field continuously changes direction, it causes the magnet to experience a push/pull effect that leads to the magnet vibrating at the same frequency as the alternating current.
According to Faraday's Law of Electromagnetic Induction, a changing magnetic field can induce an electromotive force (EMF) in nearby conductive materials, including the magnet itself if it has conductive properties. This induced EMF could create small, localized currents within the magnet, further affecting its magnetic behavior.
The magnetic field from the AC source combines with the magnetic field of the magnet through the principle of superposition resulting in a complex magnetic field around the magnet that varies in both space and time. Research shows that the magnet's field does not remain static; it may oscillate or distort depending on the strength and frequency of the external AC magnetic field.
If the frequency of the alternating magnetic field matches a natural resonant frequency of the magnet (or the system it's part of), resonance can occur, leading to large amplitude vibrations. This could amplify the effects described above and others, making the magnetic and mechanical behaviors more pronounced.
In summary, the alternating magnetic field from the voltage source causes complex interactions with the magnetic field of the magnet, leading to dynamic changes in the magnet's field, and mechanical vibrations.
But what if I replace my permanent magnet with a DC driven electromagnet? Like Figuera stated, you need to create the strongest magnet possible without taking into consideration the requirements for the induced. To create this I will take a DC signal and create a real basic electromagnet that is low power but creates a strong field like a solenoid coil.
Afterwards, I will take a smaller time varying signal to create the required magnetic pulses onto/into this static magnetic field. The intention is to use the smaller AC magnetic field to crash into the static magnetic field causing it to vibrate.
What I am experimenting around is what are the effects of a small AC driven magnetic field interacting with a stronger DC driven magnetic field. If the DC current is steady but the magnetic field moves does it induce a current on an inductor nearby? If it does induce a current, due to the DC field moving how would Lenz work?
Also, if I pulse the core material that is coiled with a static DC signal at its resonant frequency would the domains realign to the Earth magnetic field similar to hitting a piece of iron with a hammer while pointing North/South?
Lot’s to experiment but I am feeling really good about the interactions of the magnetic fields. I wonder if this is how B&S scaled their device by just creating a bigger DC driven static magnetic field.
-JA
Last year I started off THIS POST with the word Progress? And with that post I experimented with positioning a strong magnet around my coil to observe the effects. In my coil I had an alternating voltage and anyone who has held a permanent magnet up to a coil with a varying current knows that you can feel the magnet pulsate. I paid no attention at the time but my recent readings on mechanical resonance and magnetic fields has me wondering if we are all overlooking something very simple.
Hear me out, this is based on research, and testing. We know what happens when we hold a permanent magnet to an oscillating magnetic field. A magnet vibrates near an alternating voltage source due to the changing magnetic field produced by the alternating current (AC) in the source and the changing magnetic field exerts a force on the magnet. This force varies in direction and magnitude, depending on the strength and orientation of the magnetic field relative to the magnet.
As the AC magnetic field continuously changes direction, it causes the magnet to experience a push/pull effect that leads to the magnet vibrating at the same frequency as the alternating current.
According to Faraday's Law of Electromagnetic Induction, a changing magnetic field can induce an electromotive force (EMF) in nearby conductive materials, including the magnet itself if it has conductive properties. This induced EMF could create small, localized currents within the magnet, further affecting its magnetic behavior.
The magnetic field from the AC source combines with the magnetic field of the magnet through the principle of superposition resulting in a complex magnetic field around the magnet that varies in both space and time. Research shows that the magnet's field does not remain static; it may oscillate or distort depending on the strength and frequency of the external AC magnetic field.
If the frequency of the alternating magnetic field matches a natural resonant frequency of the magnet (or the system it's part of), resonance can occur, leading to large amplitude vibrations. This could amplify the effects described above and others, making the magnetic and mechanical behaviors more pronounced.
In summary, the alternating magnetic field from the voltage source causes complex interactions with the magnetic field of the magnet, leading to dynamic changes in the magnet's field, and mechanical vibrations.
But what if I replace my permanent magnet with a DC driven electromagnet? Like Figuera stated, you need to create the strongest magnet possible without taking into consideration the requirements for the induced. To create this I will take a DC signal and create a real basic electromagnet that is low power but creates a strong field like a solenoid coil.
Afterwards, I will take a smaller time varying signal to create the required magnetic pulses onto/into this static magnetic field. The intention is to use the smaller AC magnetic field to crash into the static magnetic field causing it to vibrate.
What I am experimenting around is what are the effects of a small AC driven magnetic field interacting with a stronger DC driven magnetic field. If the DC current is steady but the magnetic field moves does it induce a current on an inductor nearby? If it does induce a current, due to the DC field moving how would Lenz work?
Also, if I pulse the core material that is coiled with a static DC signal at its resonant frequency would the domains realign to the Earth magnetic field similar to hitting a piece of iron with a hammer while pointing North/South?
Lot’s to experiment but I am feeling really good about the interactions of the magnetic fields. I wonder if this is how B&S scaled their device by just creating a bigger DC driven static magnetic field.
-JA