Discuss how to convert Positive Pole to Negative in the Electrical Forum area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:   American Electrical Advice Forum

You might need to rephrase the question with the correct terminology, or you’re going to get strange answers.

An AC supply changes from positive to negative 50 times a second , (in UK) so are you asking how to change a line to neutral?

Saying you’re from the Moon also won’t help with answers
 
You might need to rephrase the question with the correct terminology, or you’re going to get strange answers.

An AC supply changes from positive to negative 50 times a second , (in UK) so are you asking how to change a line to neutral?

Saying you’re from the Moon also won’t help with answers
Yes, you understood correct my PMA (Alternator) has 3 AC +ve output A, B and C. to my understanding you need +ve and -ve to run appliances when the PMA moves I have to use Bridge which turns AC to DC and I get both +ve and -ve from three (A, B, C) poles but then I have to use a converter to get it back to AC.
I want to eliminate the converter and bridge from my circuit and would like to know if there is a device or circuit which I can use to get AC +ve and -ve straight from PMA output Poles
Thanks
 
Typically alternators are three phase, so they have 3 terminals that are all AC and spaced 120 deg in phase angle apart. The use of a suitable 6-diode bridge rectifier then results in a moderately smooth DC for charging batteries, etc.

If you use just two of them (any pair) you will get the usual single-phase AC (similar to a domestic outlet). However, by ignoring the 3rd one you are not going to be able to safely get as much power out without the risk of overheating the windings.

You have not said what the voltage is from the alternator, or what voltage you need for the load. A transformer will change the voltage, but you have other issues:
  • If the supply is not designed as a generator to substitute from the grid it may well have a very different frequency and that can cause problems. You cannot easily convert frequency, and the easy way is to do what you already do (covert to DC, back to fixed AC).
  • On a similar theme, the output voltage may not be regulated (and / or may depend on the DC output) so you can have problems of widely varying voltages.

TL;DR You need to provide more details.
 
Yes, you understood correct my PMA (Alternator) has 3 AC +ve output A, B and C. to my understanding you need +ve and -ve to run appliances when the PMA moves I have to use Bridge which turns AC to DC and I get both +ve and -ve from three (A, B, C) poles but then I have to use a converter to get it back to AC.
I want to eliminate the converter and bridge from my circuit and would like to know if there is a device or circuit which I can use to get AC +ve and -ve straight from PMA output Poles
Thanks
I suggest if you do find a way you should patent it then auction it to the highest bidder. IMHO
It's a fact that (due to phasing) L1+L2+L3=0V and a very hot alternator.
 

Reply to how to convert Positive Pole to Negative in the Electrical Forum area at ElectriciansForums.net

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

Electrical Forum

Welcome to the Electrical Forum at ElectriciansForums.net. The friendliest electrical forum online. General electrical questions and answers can be found in the electrical forum.
This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock