Rectifiers

[precisiontek]

Hello everyone

Getting 110VAC of one stator and 115VAC off the second stator..

I need 180VDC..when should I rectify?..Should I put these in a series before I rectify?

[nothing to lose]

Might need to input more info. Does not add up too me unless I am missing something.

After I am sure though.

"Getting 110VAC of one stator and 115VAC off the second stator..

I need 180VDC..when should I rectify?..Should I put these in a series before I rectify?"

110+115= 225v. 45V over, is that ok for your use? Why do you need 180Vdc?

If so maybe rectify each then connect them as DC. You can add them as DC Volts, but not as AC volts. With AC you have to worry about cycles and such.

You do know of course your playing with deadly volts here really bad!! I think I would skip it for now unless you really know what your doing.

That is why I have a 75lb 2HP 1725 rpm 16amp 180VDC motor in my living room floor!

Too darned scared to play with it for now myself.

30 Trojan T105's in series to run that motor, ooh scary thought! But it should run for almost 6-7hrs.

[kitno455]

gonna depend on what rectifiers you can get. if you rectify first, then series them, you can use two half-size rectifiers.

if the two stators are in still in phase, you could series them before the rectifier too, but then you need one big rectifier.

in either case, those rectifiers are likely to get quite warm. you will need a good sized heatsink.

in either case, i think you will end up with a good bit more voltage than you need.

might want to run a test with just one stator, and see if your motor will run on the 110 volts DC. if so, parallel the two stators is safer.

these voltages are getting a bit scary, so treat this stuff like you would AC mains power coming out of the wall. it will give you a nasty bite if you let it.

allan

[precisiontek]

Yes I agree..Very dangerous voltage indeed..I need the 180VDC to run a 3hp 15amp 1725 RPM Motor

[precisiontek]

Yes...we are getting into a very scary voltage range..

As far as the heatsink...Once I figure out what is going to work for us I will machine a Heatsink..

If you got time Allan give me a call...would love to pick your brain regarding the rectifiers

Gary

1-888-251-8433

[kitno455]

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=73142&item=7508432389&rd=1

its 800V, so a bit bigger than you need, but carries 60amps (supposedly, have not found a datasheet yet)

one of these per stator, plus a spare. then you will have 3 later when you want to go three phase.....

allan

[wooferhound]

If you rectify 120 vac and filter it with a large electrolytic capaciter you will end up with 170 vdc.

[nothing to lose]

I wonder why we have the same specs for a motor, but mine is 2hp yours is 3hp?

Oh well,

If you get this going and it works good I'd love to see the details, maybe I will do mine. For now I don't think I will work with the 180Vdc. Maybe build some type of drive unit and use it for a gennie like I first planned when I got it.

180V * 16amp = 2880watt / 12V = 240amps. Could be good to connect to an engine for a fast bank charge when winds are really low for awhile. Need a big battery bank for it though.