Comments on: “Tiny Orbo replication” 170% efficient

By: EnergyMover

EnergyMover — Sun, 28 Feb 2010 22:45:30 +0000

Hi. They’re Metglas MAGAMP cores. Longitudinally annealed with a permeability of 1 million.

By: Gary Clarke

Gary Clarke — Sun, 28 Feb 2010 22:36:03 +0000

Such lovely work

Are they neoperm cores ?

By: EnergyMover

EnergyMover — Sat, 13 Feb 2010 13:22:21 +0000

Thanks for the offer. I sure could have used you a week ago! The circuit for “Tiny Orbo Replication 2″ is complete enough to do the job. It’s not the greatest design by any means. Instead of using a high-side MOSFET driver, I’m using an ultra high permeability magnetic core for a transformer to get an isolated ground – source to drive the dual back to back MOSFETs. The reason being is that I don’t have on hand a low power high-side MOSFET driver.

Anyhow, the reason for the new circuit is to see if a faster core charging pulse will increase the efficiency. The original design was ~ 60us to 100us, while the new design is 25us, but the circuit can go below 10us. If the faster charging pulse does not help, then the old design is better since it’s simpler. What is meant by “charging pulse” is the time it takes for the pulse current to reach near maximum.

By: Interested EE

Interested EE — Fri, 12 Feb 2010 23:24:40 +0000

I have been following Steorn for a while now and stumbled across your circuit diagram. I’m an experienced EE and if you are interested, I could help to optimize your circuit design.

I believe that if you are able to reliable build an over-unity demonstrator then there will be a tremendous interest from hobbyists looking to replicate your work.

Please let me know if you would like some help.

–EE