Oscillating Reed Switch Pulse Motor.

[Wistiti]

By the way laminate steel work great for the coil core... No freqeucy trouble for me. 😀

[Allen Burgess]

By the way laminate steel work great for the coil core... No freqeucy trouble for me. ��

@ Wistiti,

Can you upload another photo? It would also be interesting to see if the oscillation can power a spinning neo-sphere magnet.

[Wistiti]

@ Wistiti,

Can you upload another photo? It would also be interesting to see if the oscillation can power a spinning neo-sphere magnet.

Sure! I will take one when i 'll be back home....

[Wistiti]

Here is my last setup... ��

[Allen Burgess]

Reed switch oscillator.

@Wistiti,

Wow! Really looks awesome. Thanks for showing it. You added some impressive heavy copper, 18 AWG. Does it work? How many volts are you using? I bet that coil would spin a neo sphere.

It would be a simple matter to calculate the resonant frequency if you can read the farads off the capacitor, along with the Ohms of the coil.

[Wistiti]

@Wistiti,

Wow! Really looks awesome. Thanks for showing it. You added some impressive heavy copper, 18 AWG. Does it work? How many volts are you using? I bet that coil would spin a neo sphere.

It would be a simple matter to calculate the resonant frequency if you can read the farads off the capacitor, along with the Ohms of the coil.

Hi Allen!
I use 2xaa battery as the source. My cap is a 160uf photo flash capacitor. The resistance of the coil is 0,8ohm.
I use a gap betwin the magnet and the steel core to start it and adjust the frequency...

[Wistiti]

A little test...

[Wistiti]

After an hour...

[Wistiti]

But as we already know; battery may act really strange... The only thing i can say for sure is this little circuit merit to be construct and explore furter more...
It produce real power.
Hope someone else will build it and share is result...

Good day/night to everyone!

[Allen Burgess]

Resonant frequency.

But as we already know; battery may act really strange... The only thing i can say for sure is this little circuit merit to be construct and explore furter more...
It produce real power.
Hope someone else will build it and share is result...

Good day/night to everyone!

@Wistiti,

It appears you're charging a 12 volt battery from a pair of AA batteries. That's a pretty cool trick!

I need to apologize about the formula for "Resonant Frequency" I outlined by mistake: Inductance in Henries, along with "Farads of Capacitance" are the factors needed to calculate resonant frequency, not Ohms of resistance. Your adjustable magnet gap changes and regulates the coil's "inductance", thereby controlling the frequency. Very nice setup, thanks for the contribution.

[Wistiti]

My pleasur! Thanks to you for bring it here.

[Allen Burgess]

Permanent magnet and coil inductance

"Incidentally, because all magnetic materials are eventually nonlinear, an increase in static magnetic field can reduce the inductance of a permeable-cored inductor. In fact, this property has been used for years, between saturable reactors, magnetic amplifiers and other very interesting devices".

Reducing the magnet gap space reduces the inductance of the coil; Reducing the inductance of the coil raises the resonant frequency of the LC tank: So, narrowing the magnet gap increases the operating frequency, and widening it slows it down!

[Allen Burgess]

Adjustable magnet strength.

We can adjust magnet strength with a magnet switch, and regulate coil inductance and LC frequency with a knob:

1.-We see two diametric magnets with poles aligned for maximum strength.

2.- Poles apart for zero attraction.

3.-The last picture is a homemade switch with two diametric rings. We can "dial" the magnetic strength in between the metal plates this way with a knob. A ferrite core can be adjustably magnetized this way instead of toying with a hit and miss separation gap!

[Allen Burgess]

Adjustable magnet strength.

This "Magnet Switch" pictured below, attached to the end of a ferrite core, can go from 0 to 95 pounds of force incrementally for $24.95 from K&J magnetics, and make the frequency regulation very easy by "knob turn" compared to the hit and miss approach of magnet gap separation:

https://www.kjmagnetics.com/blog.asp?p=magswitch

Turning the magnet on would lower the coil inductance and increase the resonant frequency.

[Allen Burgess]

Variable inductance.

There are three ways to vary inductance: One, tap the coil wires; Two, slide the core in and out of the coil; and three alter the BH curve of the core with static saturation or wrap the core with primary electro magnet turns. The taps are no good with modern insulated magnet wire, and sliding the ferrite core away from the Reed switch is impossible, and the electro magnet eats power. So we're stuck with altering the core permeability with a static magnet field.

Here's another concept I worked up to improve on the gap approach. Look at picture of the magnet positioner at the bottem: We could drill a few holes in each block, then fill the front one with a core material and the rear one with a cylinder magnet. lowering the rear hinge with the magnet, down on an angle in contact with the core up front would increase the magnet force gradually.

Thinking forward to the motor, a remote servo could vary the coil inductance with this kind of magnet hinge and control the rotor speed by raising and lowering the resonant frequency of the LC tank.