Solid State Orbo System

[Magluvin]

Hey Luc
I will try the single diode tonight. For some odd reason I cannot get my 170v, and actually I had it gettingover 250v at one point. Then, no mor than 40v. I switched out my bridge for individual diodes as you seen in the last vid. But it wasnt that.
I had done some timer work before with pulse motors and I have a Nitorous controller I made from a 556 that pulses the solenoid to give a 50% shot so I have 2 stages, 40 and 80 horses to choose from.

I have been looking for some thin wall tube ferrite beads. Im thinking that the magnet flux may favor one side of the outer bead due to the bead is not being close to saturation. If it is thinner and as a whole requires the total of the magnets flux to saturate, the flux will be spread more evenly on the switch over.
I have included a pic of what I would like to see in the physical properties from what I have learned. Having the thinner wall ferrites, the distance for the jump is shortened also. This can also be corrected with a longer outer core as shown in the pic. Its not perfect, I just whipped it together to show the basic idea.

[markzpeiverson]

Metglas makes a lot of cores that are noncrystalline! The Metglas MAGAMP is nanocrystalline and has a *HIGHER* permeability than any Finemet core, which makes Metglas cores softer than Finemet.

Metglas MAGAMP, which is Metglas 2714A square loop, has the highest permeability of all cores, 1 million -->

http://www.metglas.com/faq/?faq_id=35

First off, 'amorphous' and '[nano]crystalline' ARE MUTUALLY EXCLUSIVE!

The name should tell you...MetGLAS.  Glasses are amorphous, i.e. they are cooled so fast that crystalline structure doesn't have time to form. And for a definitive answer, I went to the link that Paul supplied and this is what I found:

Question:
What is Metglas?

Answer:
Metglas is an amorphopus metal, Amorphous metals do not have crystalline structure like other magnetic materials. All the atoms in an amorphous metal are randomly arranged, thus giving it a higher resistivity (about three times) value than that for crystalline counterparts. Amorphous alloys are prepared by cooling the melt at about million degrees per second. This fast cooling does not give the atoms enough time to rearrange into stable crystalline form. As a result one gets metastable amorphous structure. Because of the absence of crystalline structure amorphous alloys are magnetically soft (lower coercivity, lower core loss, higher permeability,...). High resistivity gives lower loss at higher frequencies. The losses are among the lowest of any known magnetic materials.

Also, for the 2714A MAGAMP core that Paul keeps mentioning, it says:

"Square Loop Cores manufactured with cobalt-based METGLAS® amorphous alloy 2714A allow the design of mag amps that can operate at higher frequencies than previously possible. Their combination of magnetic properties enable magnetic amplifiers to provide unparalleled precision and efficiency in output regulation."

So I think it's perfectly clear that @GB's insistence on ACCURACY is justified... and the MetGLAS cores are AMORPHOUS.  FINEMET is nanocrystalline.  Its all in the name... FINEMET, FINe METal, VERY-FINE=nanocrystals.

-Mark

[markzpeiverson]

Here are some other properties of MetGlas that might be useful...

http://www.metglas.com/products/page5_1_3.htm

"Saturable reactors utilize the large change between unsaturated and saturated permeabilities of their cores to delay current for a preset period of time. Similarly, once saturated in the forward direction, they act as a diode temporarily blocking current in the reverse direction.

"MAGNETIC SWITCH PROTECTION (MSP)
MSP devices made with Metglas®cores have dramatically enhanced the reliability and overall lifetime of pulse power systems. By using a saturable reactor in series with either a semiconductor or thyratron switch, the circuit designer can reduce losses in the switch and extend its life. The saturable reactor is designed to hold-off current until the switch becomes fully conductive. This delay reduces the overlap between current and voltage in the switch, thereby reducing power absorbed in the switch. MSP also offers other advantages. Higher di/dt's to the load are safely achieved by waiting for full conductivity in semiconductor switches. The diode-like characteristic of a saturated reactor provides time for switch recovery."

With the above in mind...
Would the design goal be to time the pulse ending when the inductance is at a maximum to get the most energy from the collapsing field?  Could the diode-like behavior of the saturated metglas be put to use to block bemf?  Not making any sense?        Time to get some sleep!

-Mark

[Magluvin]

Ok  got the original Orbonbon with original pickup coil but rewrapped the toroid with the 26ga green as on the pickup.
It appears that the pickup need be wrapped by the toroid windings for best results thus far. The new toroidal winding is  as many wraps as it takes to cover the inside of the bead wall, there by the outside is spaced accordingly. I am getting some descent output from this setup..

http://www.youtube.com/watch?v=-GlR7dNTs4Y

Mags

[Magluvin]

I had found some old 12v small tube style light bulbs from when I was a electronics repair guy, they were from old Yamaha or Kenwood, maybe Pioneer home receivers. They are frosted with thin leads. But I have 6.
So I put some on the Orbonbon. Check it.

http://www.youtube.com/watch?v=ES00DfhHH-U

Magluvin   Oh Yea  Luc, its said like Maglovin. Just a slang. I got the idea from a movie where a kid got a fake ID and his ID said McLovin.  lol  Luv them magnets.