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Re: DIY Air resistive loads?

Mon, 01/09/2017 - 08:10
It's great to see updates from the older posts too.
Congrats on the uses and thanks for the update!!

Re: Proper Copper Shopper (so I don't come a cropper)

Mon, 01/09/2017 - 07:54
   1h.p. =750 watts.
it's becoming  a chicken or egg thing now .
but what ever way you go first you don't want the mags to fly off.


Re: report KD 624 about a 46-pole PM-generator for the VIRYA-6.5 available

Mon, 01/09/2017 - 03:07
Dear Kitestrings

I didn't know this forum. I have looked at it but although they also use a high pole number, it isn't the same kind of design. I think they are using the motor of a slow running washing machine and they rectify the current. I am using ...

Re: report KD 624 about a 46-pole PM-generator for the VIRYA-6.5 available

Sun, 01/08/2017 - 17:48
Adriaan,

I don't know if you visit the Back Shed forum at all, but there have been a number of recent posts that made me think of you.  Most of the discussion there centers around F& P smartdrive alternators, but there are some similar themes at times:...

Re: Proper Copper Shopper (so I don't come a cropper)

Sun, 01/08/2017 - 14:24
Right, that's my shopping list rearranged. Now, imagine I have no idea how to measure horsepower and you have to spell it out real clear to some noob who is going about it all ass-backwards

Re: VAWT / PMG design

Sun, 01/08/2017 - 10:10
Pma's for vawts should be noncogging, axial flux types.
The pma i use is single phase and has separate coils that i can wire together , all in series, or all in prarallel or any combination in between. This allows better matching of pma to vawt. I can...

Re: PWM a TRIAC

Sun, 01/08/2017 - 08:25
An interesting example demonstrating this core saturation is the magnetic amplifier.  You can easily control more than a 100W of AC with just two transformers and and a 9V radio battery.

Re: 48V alternator (ICE driven)

Sun, 01/08/2017 - 07:41
Quote from: Warpspeed on January 01, 2017, 05:59:45 PM
So what would be needed would be to rewind the rotor with wire of half the original diameter (one quarter the cross sectional area) but with four times as many turns.
So i...

Re: PWM a TRIAC

Sun, 01/08/2017 - 01:23
@ULR: thanks for that observation: I've added it to my notes as a caution.

Re: Proper Copper Shopper (so I don't come a cropper)

Sun, 01/08/2017 - 01:00
I highly recommend building the motor and get it running on methane, and measure the shaft hp available before building a pma.

Re: Proper Copper Shopper (so I don't come a cropper)

Sat, 01/07/2017 - 20:48
Thanks for the input

There is a plan, it goes something like this...
1- Build PMA
2- Source and prepare a motor
3- Test on propane
  (If the digester is not operational at this point, continue using propane as fuel)
4- Connect to home supply with a ...

Re: Sailboat RE ideas and storage, and mppt...

Sat, 01/07/2017 - 19:36
I used to live aboard my 33 Hunter.  I had a Wind Gen and one 80W and two 20W panels.  The two 20W and Wind Gen were dedicated to refrigeration batteries.  The 80W was to supplement the dual house/starting batteries (on a selector switch). 

The best b...

Re: DIY Air resistive loads?

Sat, 01/07/2017 - 18:27
Happy new year!
Comfort and warmth, indeed

Re: Active Pitchcontrol

Sat, 01/07/2017 - 17:39
https://www.youtube.com/watch?v=kSqNOVECurc          just a vid of my radial bike alt...mag powered ..

Re: PWM a TRIAC

Sat, 01/07/2017 - 16:46
Half-cycling on the grid can be a problem for other devices than the one being half-cycled.  The parasitic resistance in the pole-pig transformer and the wiring from it means you can end up applying a nontrivial DC component to the input power of other...

Re: Proper Copper Shopper (so I don't come a cropper)

Sat, 01/07/2017 - 16:07
What do you intend to use this for:  Powering your house long-term?  Fill in for battery charging in an R.E. house when the sky is cloudy and/or the wind is clam?  Campground?  Welding at a job site?  Just the fun of making an electric machine?

Will it...

Re: DIY Air resistive loads?

Sat, 01/07/2017 - 13:21
Quote from: Vortechs on January 31, 2014, 01:03:04 PMAfter a whole night of full load the rad temp was 187*F / 86*C



Three years on ...

Re: Proper Copper Shopper (so I don't come a cropper)

Sat, 01/07/2017 - 07:02
do you have your rotors and magnets already?
if so, check out dan b's posts were they band the edge of the rotors.
another popular method is to drill and insert steel pins along the edge of the rotors to keep the mags in place.
most of the alternators...

Re: Active Pitchcontrol

Sat, 01/07/2017 - 04:20
More details of this test setup on Ecoforum  http://www.ecologieforum.eu/viewtopic.php?f=40&t=2566&start=1140

Re: Proper Copper Shopper (so I don't come a cropper)

Fri, 01/06/2017 - 15:17
Okay, 900rpm is guesswork for now, i'm still looking for a suitable motor - a propane forklift engine would be ideal. Let's call that a maximum speed...

I could use alternators or induction motors, but i'd rather create something from scratch.
Anyway,...