On Sat, 15 Jul 2017 11:01:29 -0400, Neon John wrote:

On Thu, 13 Jul 2017 13:36:06 -0700 (PDT), wrote:


http://www.neon-john.com

Got any newer pics of that diesel genset? That's cool. What's the weight?

No more pix. I finished the rig, then gave it to a friend of mine.
Frankly, it was too noisy for my tastes. I never weighed the thing
but it was pretty heavy. I'm 6'7", 260 lbs and it took me a pretty
hard lunge to get the hand truck up on its wheels.

I thought it might be a heavy bastid, between the cast iron and the
copper windings. It was still too loud after moving to the larger
muffler?


http://www.tnduction.com

That Roy 1500 has some beefy cooling fins on it. Only half the heat goes into the coil, eh?
(Kidding. I know that the heat in the object is created by the eddy currents from the coil.)

I've done calorimetry on the unit. It's about 80% efficient, wall to
output. Or was. I found some new SiC transistors that cut the
silicon losses to almost nothing. Now the variable speed fan barely
comes off idle.

Good. Any idea how efficient it is now?


The end-of-lifed the microprocessor I used so I made the decision to
discontinue sales while I design a whole new unit using an ARM
processor.

It was time for a redesign anyway, right? I find that I want to
change things after the first, and then after about the 12th build,
either to change materials, efficiency, or assembly methods.

Did you go with a straight chip and build your own board around it, or
use a board (Raspberry Pi, Arduino, Pine64, etc.) and build around
that? I guess you probably wouldn't need all the display and I/O from
the boards and an induction heater wouldn't take much of an
instruction set.


The housing for this unit is a (knockoff) Pelican case.

A real Pelican case would have doubled the cost of the final unit,
right?


Tons of cooling, connections to the work cables via welding
connectors, water resistant and several other upgrades.

Bueno bwana.


I'm also having custom made neoprene insulated Litz wire manufactured.
That will get rid of a LOT of losses compared to welding cables.

I had to look up "Litz wire". Better eddy currents, eh? Interesting.
Better waterproofing? groan

-
If ever the Time should come, when vain and aspiring

Men shall possess the highest Seats in Government,

our Country will stand in Need of its experienced

Patriots to prevent its Ruin.
-- Samuel Adams