47000 Watt Magnetizer

[tinman]

This is my attempt at building a magnetizer,so as i can make my own magnets.
It is needed for an up and coming project ,where as i have to magnetize an odd shape rotor-->a sample rotor is in the video. Most of you will know who's design the rotor is,and what machine it belongs to. But i will be going about the supplied magnetic field in a different way.

https://www.youtube.com/watch?v=a3wxqERrSbM


Brad

[DreamThinkBuild]

Hi Tinman,

Interesting project, is your design going to divert the flux through a C core on either side?

I've tried a precessed magnet(45 degrees) but used individual stator coils. When aligned to the center of the coils it generates a really nice multi-phase AC output. This design still has cogging as the plane of the magnet crosses the stator cores but it was pretty fun to build and learn from.

Looking forward to your build.

[tinman]

Hi Tinman,

Interesting project, is your design going to divert the flux through a C core on either side?

I've tried a precessed magnet(45 degrees) but used individual stator coils. When aligned to the center of the coils it generates a really nice multi-phase AC output. This design still has cogging as the plane of the magnet crosses the stator cores but it was pretty fun to build and learn from.

Looking forward to your build.

Nice build DTB.
I wonder if the coging was due to the fact that your magnet was not shaped so as the outer perimeter was always level with the core of the coil's like mine will be?.

Also,did it load the prime mover down when current was drawn from the coils?.

Brad

[MileHigh]

If you are doing a variation on a Jim Murray "wobbling rotor flux redirector" and deciding that you will make the wobbling rotor into the magnet, then don't hold out much hope.

Ask yourself this:  Is there any difference between a wobbling rotating magnet and a regular rotating magnet as far as it goes from the point of view of some pick-up coils surrounding the rotor?

The answer is no.  The pick-up coils are "blind" and they could not care less if the changing flux came from a wobbling rotor, a nice spinning axially magnetized cylinder, or from a Aborigine witch doctor frantically waving magnets around in front of the coils.

Jim Murray is quackery, but I know that a lot of the fun for you is building stuff.  Just don't expect anything unusual on the power generation side of things.

I looked at your clip.  If you engaged those big batteries to energize the coil with a big relay and the relay got stuck you could have a risk of a thermonuclear meltdown if you did not have a secondary switch for an emergency shutoff.  If you have a big knife switch lying around it would be useful as an emergency shutoff.

What about capacitors?  Do you have any big capacitors of sufficient voltage?  If yes, then a few big industrial power diodes in parallel for the capacitor and some in parallel for shorting out the big BEMF current pulse from the coil itself and a big knife switch and you might have a viable capacitor-based magnetizer.  It sounds safer to me.

[tinman]

If you are doing a variation on a Jim Murray "wobbling rotor flux redirector" and deciding that you will make the wobbling rotor into the magnet, then don't hold out much hope.

Ask yourself this:  Is there any difference between a wobbling rotating magnet and a regular rotating magnet as far as it goes from the point of view of some pick-up coils surrounding the rotor?

The answer is no.  The pick-up coils are "blind" and they could not care less if the changing flux came from a wobbling rotor, a nice spinning axially magnetized cylinder, or from a Aborigine witch doctor frantically waving magnets around in front of the coils.

Jim Murray is quackery, but I know that a lot of the fun for you is building stuff.  Just don't expect anything unusual on the power generation side of things.

I looked at your clip.  If you engaged those big batteries to energize the coil with a big relay and the relay got stuck you could have a risk of a thermonuclear meltdown if you did not have a secondary switch for an emergency shutoff.  If you have a big knife switch lying around it would be useful as an emergency shutoff.

I see a very big difference MH,but i dont think you do,or maybe you dont understand as to how i am going to go about it,or how the magnetic field is orientated on the !!wobbling rotor!!. It will not be anything like a normal rotor,or the Aborigine witch doctors waving magnets.

I looked at your clip.  If you engaged those big batteries to energize the coil with a big relay and the relay got stuck you could have a risk of a thermonuclear meltdown if you did not have a secondary switch for an emergency shutoff.  If you have a big knife switch lying around it would be useful as an emergency shutoff.

Way ahead of you there MH--i have the knife gate

What about capacitors?  Do you have any big capacitors of sufficient voltage?  If yes, then a few big industrial power diodes in parallel for the capacitor and some in parallel for shorting out the big BEMF current pulse from the coil itself and a big knife switch and you might have a viable capacitor-based magnetizer.  It sounds safer to me.

I dont have any capacitors large enough to do the job. What i do have is some very large diodes,and they will be used across the coils to form the current loop upon switch off. I will be fireing the relays by using series capacitors. This way,by adjusting the value of the capacitors,i can adjust the time the relay is on,and i will just put a high value bleed down resistor across the capacitors,so as we have an auto reset on the caps.

I posted a comment on Aarons video about Jim Murrys generator,but he removed it within 15 minutes lol. Some just dont like the truth. Below is a screen shot i took right after i posted it .