Bridge Rectifier

[97fishmt]

Here is a 3 phase bridge rectifier I picked up.


200 volt 150 amp stud diodes
One heat sink is positive and one negative.


I'm putting together another machine a 20 hp  servo motor
and will be changing my battery bank over to 24 volt.

I'll have to start shopping for a 24 volt inverter soon.

Some of my neighbors are interested in wind now that they
have seen me do it for over 20 years.  The problem is I can't
recommend wind for them because their sites don't have
the kind of wind I do.  Solar is their best bet.  

I'll still try and build them a small machine to see if they get
hooked like I am.  

Mike

[Tritium]

Very nice. 

Thurmond

[tanner0441]

Hi

With 150A diodes you could build quite a big wind turbine.  At 24V you could look up to 3+ Kw

Because of the corrosion on the heat sinks I would be inclined to remove the diodes and make sure the mounting area is sound with good heat sink compound, and brush the lose oxide off.

Still a good acquisition..

Brian

[97fishmt]

Yea that's the plan to clean 'em up and put 'em into service.

$20 was a bargain for sure.  I have quite a nice turbine now
but, here I go again, I just can't resist these servo motors going
for so cheep.

20 hp for $55.  Maybe good for 2.5kw for 24 volt battery charging.
We'll see.  Might take a 16' prop or so.  I'm sure having fun.

Mike

[birdhouse]

mike-
nice score!  those have some nice heat sinks! 

so this 20hp servo...  how much does it weigh?  what brand? 

adam

[97fishmt]

Hi Adam,

How is your mill coming along?

I really had to research this one.  Their wasn't a lot of info from the seller.
He just said he bought it in a tool bin lot and didn't know anything about
it other than what was on the box.

Brand new in the box (wow! score!).  I got on the motors company web site
and did a lot of reading.

The controller for this motor had a 300 volt bus and a 70 amp rating.

Motor weighs 110 pounds neo magnets 1500 rpm.  IIS in New York.

It's a gamble I know but what the heck.  I think the controller steps
the voltage down a bit for the pwm to the motor  for its 70 amps
and maintains 300 volts at the bus.  So I'm guessing the voltage of
the motor is 200 volt, it seems to be the standard.  70 amp, 1500 rpm.

195 rpm for 26 volts, I bet it is a little better than that using it as an
alternator.  Anyway you know it will do 3kw,  These motors are bullet proof.
If it turns out to be 300 volt at the motor then the cut in would be 130 rpm.
 

Mike

[birdhouse]

mike-
wow, those specs sound very good!  i'm guessing you haven't received the motor yet.  yea, i think that beast will require some pretty large blades!  this is the first i've heard of neo's coming in a stock motor!  what's the brand if you don't mind me asking. 

my mill is done.  just need to test it on my truck, to check furling moment, and see what it is good for.  i'm gonna install it out at my get away property.  i'm hoping to get it totally dialed in so i can leave it run for durations while i'm not there.    i think tomorrow i'm gonna start doing some tower pipe welding. 

i'll bet you can't wait to start bench testing you new toy!

adam

[97fishmt]

Hi
The newer motors come with neo magnets
That's how they keep making them smaller.

Here is a tiny one I just bought.


2.3 kw for $20
motor voltage 325
amps 9.5
sweet little unit for one of the
neighbors.

Industrial Indexing Systems servo motor
for the 20 hp unit.  That's 15000 watts/70 amps= 214 volts
we'll see how that works out.

Do a story on your build sometime.

Take care

Mike

[birdhouse]

mike-
wow, another nice looking servo!  ever thought of changing you screen name to "sir servo"?   

i will do a thread on my build, i just wanted to get some truck testing numbers out of it first.  this would make it more complete. 

i did do an early thread on the build http://fieldlines.com/board/index.php/topic,138457.msg919520.html#msg919520

we have cabins not too far apart.  mine's outside of bickleton, wa.

adam