[no subject]

["harry landis" <hlandis hotmail com>]

To the list:

I suppose since there is a flurry of interest in inverters, I will put in my 
two cents. I built a device last spring that solved the problem for me. 
Since I don?t want to use anything except tools with brush type motors with 
power from the ET, I don?t need AC. So I took 4  Vicor 150 watt 48v to 48 
volt dc-dc converters and connected the inputs in parallel and the outputs 
in parallel. (They are made to run on 36-72 volt input, but actually work 
down to 28v) So now I have 600 watts (12 amps) of 48V isolated power. Then I 
took a 48v to 15v 150 watt (10 amps) converter and wired the input in 
parallel with the other inputs, and put the output in series with the other 
outputs. So now I have 10 amps or more of 63 volt power. Now I put this 
output in series with the battery pack. Now I have 10 amps or more(1000w) of 
99v DC power. Which is just about right to run universal motors. They prefer 
it to 110 AC. Better life, more power, fewer losses. The converters cost 
about $100 ea from Vicor. I have about enough surplus ones to make maybe 2 
more converters. They are about ½? x 3? x 5?. It?s called a full brick 
package. You can probably find them on the Vicor site. I screwed them all to 
a 1/8? aluminum plate that sits across the front of the E12 under the hood 
(over the batteries). It doesn?t get in the way of anything. The input is 
taken from the PTO outlet. The output is an outlet on the plate.It also has 
a switch/circuit breaker to turn it on and protect it from overloads. The 
converters are 85% -95% efficient.  It has worked fine from the moment I 
first turned it on. I use a weed whacker, chain saw and rotary hammer  with 
it, no problem. I haven?t seen a source of these things surplus. I got mine 
in a one time deal. I suppose I would part with a set for  $150. The buyer 
would have to make the mounting plate and wire it all together. I probably 
also have a circuit breaker and  outlet.

Harry Landis
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