STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[interestedinou]

Hi INT,

Schematic below.  Diode across coil L1.  When transistor turns on, Collector goes low and that junction goes to ground.  When transistor turns off, inductive kickback in NORMAL inductor will drive the collector/inductor junction higher than the +12VDC, turn on Diode and induced back EMF will go back into coil.  Used all the time to protect transistor.  This is the short explanation.OKDOKIE......

Ben

Thanks! I appreciate the schematic!

[Staffman]

Anyone have any luck finding the toroid in JLN's schematic? He shows only 68 turns of appx AWG 25. I'm trying to hunt the core down. Right now I'm waiting for replies from sales reps.

Edit
OOPS: Make that 67 Turns.

[broli]

Get rid of the reed switch. If you want to dynamically control duty cycle use two hall sensors/reflective sensors. One at TDC and one a little further which you can control by hand. When the first switch triggers at TDC it will trigger the coils on and leave them on untill the second sensor triggers and turns them off.

[PaulLowrance]

I can now get the rotor to approximately 2000 RPM using only 10ma at 12V.

Hi Ossie,

How much of that 120mW power is wasted in joule heating from the coil?

Thanks,
Paul

[Reincarnate]

Thanks @Reincarnate,
Unfortunately, the video wasn't of much help. What was it supposed to demonstrate didn't come across at all.


As for this:

If that's the case then Thane Heins' is quite different from Orbo because the pulse motor as well as the toroids are the most substantial part of Orbo. If I find our what Thane Heins' device really is I may probably revise the above conclusion but thevideo definitely didn't help one bit in understanding its principle of action.

Omnibus,

I would also point out that Thane drives his motor with a triac which makes it a pulse motor. If he didn't, the motor could not accelerate since it would be inductively coupled to the mains.

The Only difference is a toroidal coil verses a coaxial coil. It's odd how people don't see what is in front of them an put it all together.