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Inverting 115VDC to 115VAC. 75watts? Answered

What would be the best low cost method for me to invert 115vdc to 115vac for a low 75watts bench experiment?

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The Ideanator

7 years ago

"The 115vdc is comming from a ac/dc 1/15 hp, series wound ac/dc ,5000rpm, motor that I am using as an gererator. I asume that I will produce 115vdc as the shaft turns at 5000rpm's. The voltage the gererator produces I would like to regulate and control to 12vdc."

First, TEST your generator setup with a multimeter or oscilloscope, you don't want to be wrong about what it actually outputs at load, do you?
Second, if it outputs DC (I'm skeptical), Its a waste to convert from DC to AC and back to DC, You would be better off with some AC smoothing capacitors (in case its not a terribly smooth signal) and a tested-voltage to 12v transformer rated for 75w (or whatever else you need) to get the desired output.
Third, test a lot, since I'm guessing you don't want to kill anything important.
 

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lemonie

7 years ago

Where is the 115VDC coming from, and what do you need AC for?

It sounds like something that shouldn't be done (in this way), but I don't know enough to say why.

L

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rpshomeserviceslemonie

Answer 7 years ago

The 115vdc is comming from a ac/dc 1/15 hp, series wound ac/dc ,5000rpm, motor that I am using as an gererator. I asume that I will produce 115vdc as the shaft turns at 5000rpm's. The voltage the gererator produces I would like to regulate and control to 12vdc.

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steveastrouk

7 years ago

Use 12DC and a cheap 100W inverter. Building a 1 off 115Dc inverter is not for the faint hearted !

Steve