[SEL] Generator hookup

[Curt]

Ahh! The short answer is no. You'll just make a nice electric heater out 
of your step down transformer. As you know power transformers are 
designed to work on full reversing 60 cycle energy. Your generator is 
not simply the lower half of 60 cycle power flipped up to give you what 
would look like 60 cycle single phase rectified power.
As you rotate the rotor on your generator 1 full turn you go by dozens 
of sets of commutator bars. Each one of these produces a short time but 
true sinusoidal wave form. But there are so many of them when you look 
at it with a scope all you see is a ripply wave form that is the 
summation of all these little sinusoidal peaks. That almost pure DC will 
just nicely heat your transformer windings imparting not a bit of 
current flow in the secondary.
If you really want to use this generator then you could hook like 
wattage devises in series to split the voltage.
Curt Holland
Gastonia, NC


Richard Strobel wrote:

>I should have stated that differently, Curt.
>
>  Could one take the output of this 250VDC generator which produces 
>pulsating D.C. and hook it into a step-down transformer to a more suitable 
>voltage?
>
>  Or would I just let the smoke out as I believe they're frequency 
>sensitive?
>
>later,
>Rick
>
>
>
>
>
>
>
>
>----- Original Message ----- 
>From: "Curt" <curt at imc-group.com>
>To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
>Sent: Wednesday, May 11, 2005 11:50 AM
>Subject: Re: [SEL] Generator hookup
>
>
>  
>
>>Rick,
>>You can invert it to usable AC. See if you can pick up an old used 5HP
>>inverter. That size will be in the ballpark for the kva/kw of the
>>generator you have. You'll have to by pass the 6 diodes that convert the
>>three phase power input to DC. Just bring your DC power into the other
>>the side of the rectifier. Since you will have no reference 60Hz input
>>power for the unit to base its max freq off of you may have to build a
>>small 60 hz power supply just to keep the electronics straight. But that
>>is pretty simple stuff. Find a ham buddy and let him help you with that
>>part.
>>Curt Holland
>>Gastonia, NC
>>
>>Richard Strobel wrote:
>>
>>    
>>
>>>Say..been meaning to ask..Can one transform Pulsating DC?
>>>
>>>
>>>
>>>Rick
>>>
>>>
>>>----- Original Message ----- 
>>>From: "Listerdiesel" <listerdiesel at gmail.com>
>>>To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
>>>Sent: Wednesday, May 11, 2005 8:59 AM
>>>Subject: Re: [SEL] Generator hookup
>>>
>>>
>>>
>>>
>>>      
>>>
>>>>On 5/10/05, Richard Strobel <Richard_Strobel7 at msn.com> wrote:
>>>>
>>>>
>>>>        
>>>>
>>>>> Howdy all with Elden on the side.
>>>>>
>>>>>   Need some help getting this ole girl excited :-)
>>>>>
>>>>>  Generator rated at 250 VDC @ 16 amps.
>>>>>
>>>>>
>>>>>          
>>>>>
>>>>Rick:
>>>>
>>>>It may be worth mentioning that 250V DC can be Lethal, be awfully
>>>>careful what you are doing and keep both hands away from electrical
>>>>bits at a time, or one in your pocket at least!
>>>>
>>>>We've been running a big 600V DC charger here recently, and had to
>>>>take a lot of precautions, but 200-250V DC will kill you just as
>>>>easily.
>>>>
>>>>Peter
>>>>-- 
>>>>Peter A Forbes
>>>>Email: listerdiesel at gmail.com
>>>>Web: www.oldengine.org/members/diesel
>>>>
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>>>>
>>>>
>>>>        
>>>>
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>>>      
>>>
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>