|
Posted by Don Foreman on March 13, 2006, 12:34 pm
Please log in for more thread options
wrote:
>This involves metalworking...<G>
>
>Ive gotten a wild hair to build a wind generator. I believe I either
>have most of the stuff...or can scrounge it up easily enough.
>
>Im NOT doing this to go off the grid...with my power needs..Id have to
>cover the back 40 with windmills. This is simply something Fun to do.
>
>Im pretty sure all those 110vt DC tread mill motors Ive got..aint
>going to work very well unfortunatley...getting one up to 3600 rpm in
>the variable winds I have here..often gusty dust devil winds in the
>summer time..slight breeze to 70mph winter storms.
>
>Ive been doing some web searching..and the verticle types that use
>lift look interesting..and I can mount one easily enough on the shop.
>Though a prop job looks doable also.
>
>http://www.windstuffnow.com/main/darrieus_type.htm
>http://www.windstuffnow.com/main/newpage5.htm
>http://www.windstuffnow.com/main/vawt.htm
>
>Anyone have any specific preferences? Someone here sent me some files
>from Oz on using a washing machine motor..a radial style Ive never
>seen here in the US ever never. And no..I cant afford $150 worth of
>exotic magnets to modify a GM alternator.
>However..I can chain drive a 2 wire alternator..shrug.
>
>Ive got to be able to build this thing using off the shelf,
>scroungable Stuff, build it in a reasonable amount of time (no life
>long projects) and charge some batteries. The more the better of
>course.
>
>Ive got a very high end 5500 watt inverter/charger that came out of a
>brand new land yacht that burned..but didnt touch the inverter (and it
>works) to use to give me true sine wave 110vts if I want to add it to
>the system after its done.
>
>
>Chuckle..and frankly..Im tired of making stuff in the shop that is
>used to simply fix other machines..I want to make Something! <G>
The 3600 RPM rating is at 110 volts. If those are permanent magnet
motors, they will probably produce 12 volts at about 400 RPM. DCPM
motor exhibit speed that is about linearly proportional to voltage --
and produce voltage proportional to speed when driven as generators.
Current rating is determined by the wire in the windings, regardless
of operating speed. A 110 volt 1 HP motor will only be good for
about 75 watts at 12 volts.
You might come across some good-sized DCPM servomotors in your machine
tool travels. I would think that they might work very nicely as DC
generators.
Keep your eye peeled for burned-out VFD's. They will contain ferrite
transformers from which you can scrounge the cores to make switchmode
power converters to change DC voltage. The magnetics are always the
hard part to come up with. The elex aren't hard at all working at
below 24 volts. I could help with that part if you like. I have
lots of 55-amp 60-volt power MOSFETs in my goodiebox, could spare a
couple.
|
|
Posted by Gunner on March 13, 2006, 3:02 pm
Please log in for more thread options
On Mon, 13 Mar 2006 11:34:50 -0600, Don Foreman
>wrote:
>
>>This involves metalworking...<G>
>>
>>Ive gotten a wild hair to build a wind generator. I believe I either
>>have most of the stuff...or can scrounge it up easily enough.
>>
>>Im NOT doing this to go off the grid...with my power needs..Id have to
>>cover the back 40 with windmills. This is simply something Fun to do.
>>
>>Im pretty sure all those 110vt DC tread mill motors Ive got..aint
>>going to work very well unfortunatley...getting one up to 3600 rpm in
>>the variable winds I have here..often gusty dust devil winds in the
>>summer time..slight breeze to 70mph winter storms.
>>
>>Ive been doing some web searching..and the verticle types that use
>>lift look interesting..and I can mount one easily enough on the shop.
>>Though a prop job looks doable also.
>>
>>http://www.windstuffnow.com/main/darrieus_type.htm
>>http://www.windstuffnow.com/main/newpage5.htm
>>http://www.windstuffnow.com/main/vawt.htm
>>
>>Anyone have any specific preferences? Someone here sent me some files
>>from Oz on using a washing machine motor..a radial style Ive never
>>seen here in the US ever never. And no..I cant afford $150 worth of
>>exotic magnets to modify a GM alternator.
>>However..I can chain drive a 2 wire alternator..shrug.
>>
>>Ive got to be able to build this thing using off the shelf,
>>scroungable Stuff, build it in a reasonable amount of time (no life
>>long projects) and charge some batteries. The more the better of
>>course.
>>
>>Ive got a very high end 5500 watt inverter/charger that came out of a
>>brand new land yacht that burned..but didnt touch the inverter (and it
>>works) to use to give me true sine wave 110vts if I want to add it to
>>the system after its done.
>>
>>
>>Chuckle..and frankly..Im tired of making stuff in the shop that is
>>used to simply fix other machines..I want to make Something! <G>
>
>The 3600 RPM rating is at 110 volts. If those are permanent magnet
>motors, they will probably produce 12 volts at about 400 RPM. DCPM
>motor exhibit speed that is about linearly proportional to voltage --
>and produce voltage proportional to speed when driven as generators.
>Current rating is determined by the wire in the windings, regardless
>of operating speed. A 110 volt 1 HP motor will only be good for
>about 75 watts at 12 volts.
These are 2.5hp
>
>You might come across some good-sized DCPM servomotors in your machine
>tool travels. I would think that they might work very nicely as DC
>generators.
I indeed have some pretty good sized servo motors. There is one out
there that has a 3/4" shaft on it. Ill have to pull it out and see
what it is, though its likely an AC servo..but Ill check. Hitachi I
think. got a bunch of smaller ones..smaller being relative..must
weight about 50 lbs. All are new..though now a bit rusty from weather
exposure. I believe they have outputs for tach etc..tru servos. I
couldnt sell the damned things..was considering tossing em.
>
>Keep your eye peeled for burned-out VFD's. They will contain ferrite
>transformers from which you can scrounge the cores to make switchmode
>power converters to change DC voltage. The magnetics are always the
>hard part to come up with. The elex aren't hard at all working at
>below 24 volts. I could help with that part if you like. I have
>lots of 55-amp 60-volt power MOSFETs in my goodiebox, could spare a
>couple.
Im so weak on basic electronics to be foot shuffling blushingly
embaressed, compared to even the meanest whiz bang guy here. Not
something Ive ever needed in my various lines of work..basic
electrical yes..but not electronics.
Im sure Ill indeed need some assistance on "switchmode power
converters" etc etc (what ever they are) <G>
I can scrounge Stuff pretty good..and even find a use for a lot of
Stuff..mostly electro or mechanical..but the fancy stuff is simply a
unit..not a collection of parts, to me.
How do I tell if a servo is a DC permanant magnet type?
Most of these have screw on Cannon or amphenal type connectors.
Most are Reliance electric..so I could do a web search........
hummmmmmmmmmmm
Gunner
"A prudent man foresees the difficulties ahead and prepares for them;
the simpleton goes blindly on and suffers the consequences."
- Proverbs 22:3
|
|
Posted by Don Foreman on March 13, 2006, 5:31 pm
Please log in for more thread options wrote:
>
>Im sure Ill indeed need some assistance on "switchmode power
>converters" etc etc (what ever they are) <G>
They're just efficient electronics that can change DC power from one
voltage to another and regulate voltage and/or current. Nearly all
power supplies in electronic stuff (like 'puters) are switchers these
days. Instead of having big 60Hz power xfmrs they rectify line
voltage to DC, then chop (switch) it with transistors (MOSFET,
bipolor or IGBT) at a high frequency so the transformers and
inductors can be quite small. "Inverter" welders, and plasma
cutters and VFD's are switchers too. In addition to being small,
lightweight, and cheap if made in volume, they can be very efficient.
And, by the way, good Luxeon LED flashlights use little switchers
too. (Still have the Luxeonized MX991U on my ta-do list!)
Switchers can be kinda complex and hairy in general, but they can
also be quite simple for low DC voltages and modest currents like a
few amps.
I could get interested in this too because the wind never stops
blowing at the lake. There are a lot of wind farms in SW MN.
>
>I can scrounge Stuff pretty good..and even find a use for a lot of
>Stuff..mostly electro or mechanical..but the fancy stuff is simply a
>unit..not a collection of parts, to me.
>
>How do I tell if a servo is a DC permanant magnet type?
>Most of these have screw on Cannon or amphenal type connectors.
>Most are Reliance electric..so I could do a web search........
Some but not all DCPM motors "cog" a little when you turn the shaft.
See if they have brushes. If they do, they're very likely DCPM
motors.
Yeah, see if you can find some schematics or specsheets. That could
help a lot. If they are brushless DCPM motors they might need a bit
of surgery to be used as generators. No rewinding or anything, just
bypass the internal elex to connect direct to the windings.
I am no expert on servomotors in particular, but I know a little about
motors in general.
|
|
Posted by Ned Simmons on March 13, 2006, 6:03 pm
Please log in for more thread options gunner@lightspeed.net says...
>
> How do I tell if a servo is a DC permanant magnet type?
> Most of these have screw on Cannon or amphenal type connectors.
> Most are Reliance electric..so I could do a web search........
>
A DCPM motor will have brushes and two large power connections. A
brushless (AC) servo will have three power leads or connections, some
smaller connections for the commutation sensors, and no (surprise <g>)
brushes. This is in addition to the encoder/tacho/resolver or whatever
the motor uses for position/velocity feedback.
Since a brushless servo motor is essentially a synchronous three phase
PM motor, I expect it'd make a dandy alternator. Rectify the output if
you want DC to power an inverter.
Ned Simmons
|
|
Posted by on March 13, 2006, 8:56 pm
Please log in for more thread options wrote:
>
>I indeed have some pretty good sized servo motors. There is one out
>there that has a 3/4" shaft on it. Ill have to pull it out and see
>what it is, though its likely an AC servo..but Ill check. Hitachi I
>think. got a bunch of smaller ones..smaller being relative..must
>weight about 50 lbs. All are new..though now a bit rusty from weather
>exposure. I believe they have outputs for tach etc..tru servos. I
>couldnt sell the damned things..was considering tossing em.
Too bad you are so far from me - I'd love to scavenge your pile!!
*** Free account sponsored by SecureIX.com ***
*** Encrypt your Internet usage with a free VPN account from
http://www.SecureIX.com ***
|
| Similar Threads | Posted | | Re: Windmill types? | March 13, 2006, 4:01 am |
| Windmill types? | March 13, 2006, 5:02 am |
| Re: Windmill types? | March 13, 2006, 1:51 pm |
| Re: Windmill types? | March 13, 2006, 5:19 pm |
| windmill | December 18, 2006, 7:40 pm |
| Brake for small windmill? | September 13, 2007, 10:21 pm |
| Getting Rid of M I 5 types Need help | February 23, 2008, 8:57 pm |
| A warning to all DIY types | December 25, 2006, 9:47 am |
| Pulley Hub Types | September 28, 2007, 10:18 am |
| Looking For Apprentice-Types... | October 19, 2007, 12:56 pm |
|
|
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap
>
>Ive gotten a wild hair to build a wind generator. I believe I either
>have most of the stuff...or can scrounge it up easily enough.
>
>Im NOT doing this to go off the grid...with my power needs..Id have to
>cover the back 40 with windmills. This is simply something Fun to do.
>
>Im pretty sure all those 110vt DC tread mill motors Ive got..aint
>going to work very well unfortunatley...getting one up to 3600 rpm in
>the variable winds I have here..often gusty dust devil winds in the
>summer time..slight breeze to 70mph winter storms.
>
>Ive been doing some web searching..and the verticle types that use
>lift look interesting..and I can mount one easily enough on the shop.
>Though a prop job looks doable also.
>
>http://www.windstuffnow.com/main/darrieus_type.htm
>http://www.windstuffnow.com/main/newpage5.htm
>http://www.windstuffnow.com/main/vawt.htm
>
>Anyone have any specific preferences? Someone here sent me some files
>from Oz on using a washing machine motor..a radial style Ive never
>seen here in the US ever never. And no..I cant afford $150 worth of
>exotic magnets to modify a GM alternator.
>However..I can chain drive a 2 wire alternator..shrug.
>
>Ive got to be able to build this thing using off the shelf,
>scroungable Stuff, build it in a reasonable amount of time (no life
>long projects) and charge some batteries. The more the better of
>course.
>
>Ive got a very high end 5500 watt inverter/charger that came out of a
>brand new land yacht that burned..but didnt touch the inverter (and it
>works) to use to give me true sine wave 110vts if I want to add it to
>the system after its done.
>
>
>Chuckle..and frankly..Im tired of making stuff in the shop that is
>used to simply fix other machines..I want to make Something! <G>