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Re: Control for heating with solar off grid no batteries

Discussion Board - 2 hours 8 min ago
What have you done lately.  You should have burned up something by now.

How important is tracking the power point?  At my camp I don't do it.  I'm only there for
one season so the temperatures are pretty consistant.  My water heaters do not present
e...

Re: 5kw Poncelet Wheel Project

Discussion Board - Fri, 08/26/2016 - 17:40
Hello!

Could you elaborate on  " The gov't owns the land from the high water mark down to the river"

Is this land that doesn't belong to you,  or are they saying that they control the (your)  land to the high water mark.

ALSO,  elaborate  on "high wate...

Re: bonding wire

Discussion Board - Fri, 08/26/2016 - 16:28
On that long of a run you do not ground it back to the house. The tower should have its own ground system of multiple ground rods in a star pattern.

Re: 5kw Poncelet Wheel Project

Discussion Board - Fri, 08/26/2016 - 06:55
quantitative easing is a term that every one should become familiar with .
they ran out of ideas on how to stimulate the economy. so in the U.S. and europe, central banks print money and give it to their friends.
well, they don't really print it. it ju...

Re: 5kw Poncelet Wheel Project

Discussion Board - Thu, 08/25/2016 - 20:53
Quote from: skid on August 20, 2016, 01:37:15 PM but the gov't regulators are trying to bleed me dry with all the fees associated with their approvals.


Government cannot give money to anyone, but that they first ta...

Re: bonding wire

Discussion Board - Thu, 08/25/2016 - 18:25
I don't think its practical to protect against a direct lightning strike, and you don't have to worry about the transformer effect because the currents are not significant.


If you put gas discharge and mov's between the 3 phases (or after the rectifie...

MOVED: bonding wire

Discussion Board - Thu, 08/25/2016 - 07:18
This topic has been moved to Wind.
Not really a FAQ write up. Moving to more appropriate board
http://www.fieldlines.com/index.php?topic=149064.0

Re: Help with motor conversion

Discussion Board - Thu, 08/25/2016 - 02:26
A PM-generator can be made from a 3-phase asynchronous motor if the motor has four, six or eight poles. However, the phase voltage generated at a certain rotational speed is higher for higher pole numbers. If the winding is rectified, you get a DC volt...

Re: Control for heating with solar off grid no batteries

Discussion Board - Wed, 08/24/2016 - 17:49
It was a typical trip.  Just outside Corning NY, about 200 miles from camp, I looked in the rear view mirror and saw smoke.  Leaf spring on trailer snapped and tire was burning a hole in plastic storage container.  Just missed the battery by an inch.  ...

Re: Control for heating with solar off grid no batteries

Discussion Board - Wed, 08/24/2016 - 16:29
 Have not heard anything.  Just checking how the trip was to the camp ?

Re: Blades

Discussion Board - Wed, 08/24/2016 - 15:50
Blade noise indicates either flutter (mechanical vibration) or blade tip vortex noise (aerodynamic vortex shedding). Unless the blades are really flimsy, it's quite unlikely that we are talking about mechanical vibration, which leads me to believe that...

Re: Help with motor conversion

Discussion Board - Wed, 08/24/2016 - 12:51
Four magnetic loops are coming out of a 4-pole armature. However, at the position of the magnets, almost no magnetic flux is coming out of the armature. The magnetic flux flowing in the stator stamping is hindered by an outside groove and the stator st...

Re: Help with motor conversion

Discussion Board - Wed, 08/24/2016 - 12:01
The stator has 8 grooves with straps and bent ends.  Will this cause the same problems as 4 slots?

What is the best kind of epoxy to use?  I have JB  weld and t88 epoxy.

Has anyone drilled holes and screwed them on?  I found a method for drilling wit...

bonding wire

Discussion Board - Wed, 08/24/2016 - 11:33
Been doing a lot of reading and looking at different tower install manuals, what others have done, wiring diagrams, etc.  I know I need to ground my guy wires, and tower.  Also am pretty certain then that I also need bonding wire back to other areas on...

Re: Help with motor conversion

Discussion Board - Wed, 08/24/2016 - 03:28
In my free report KD 503, I give detailled information about the design of a 4-pole PM-generator made from an asynchronous motor frame size 100. Fluctuation of the clogging torque is prevented by chosing an angle in between the grooves and the shaft ax...

Re: Help with motor conversion

Discussion Board - Wed, 08/24/2016 - 03:09
Quote from: joestue on August 23, 2016, 01:56:13 AM
Adriaan, i've never heard of a motor that is wired with coils that are wider electrically than they need to be, they are always narrower so to speak. but perhaps its just se...

Re: ATmega328P for OpenTRV use

Discussion Board - Wed, 08/24/2016 - 01:35
Hi,

We are hitting Flash/code limits on the 328P, and the unit cost of even that device (even in bulk) far higher than we can afford if we are going to get the valve cost down to our target range to give financial payback in a single year.

A particular...

Re: Help with motor conversion

Discussion Board - Tue, 08/23/2016 - 22:51
Quote from: hiker on August 23, 2016, 01:16:40 PMAlways thought that wasn't advisable ...as in making slots in the metal rotor..distorts the magnetic field..end up with a weaker magnetic field being directed towards the coil...

Re: rewound 5kw generator

Discussion Board - Tue, 08/23/2016 - 18:54
There is a lot of space, the original winding was 3.2 pounds of copper.

i put about 5.5 pounds of copper. and the slots are not even half full.

after finishing the winding, i used about 200 nylon zip ties to hold the winding together, at the e...

Re: bad batteries?

Discussion Board - Tue, 08/23/2016 - 18:24
Just a different solar charger is all you need if you are charging from panels.  I imagine you have one of the more economical PWM chargers and many times those aren't real adjustable.  MidNite solar makes some good ones that should work nicely.  Check...
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