240volts 3phase 6wires

[kattos]

(blank)

[David HK]

Could you be more specific and post more information that can help us help you.

David HK

[Flux]

No you won't see much about it. Nearly all the information on motor conversions was produced by Zubbly and it was N American based.

The European system is perfectly simple. Motors usually have 6 leads giving the option of using 415v star connected or 230V delta connected. There is no need for the complex N American scheme that seems to have to cater for 115v 230v and 460v.

Theses things were never intended to be converted to alternators so you are restricted to two options with the European system. The N American scheme in its original form is not much more versatile but by digging into the winding and breaking an internal star point you give yourself a whole new set of options.

If you want to do anything with the European windings other than star delta then again you have to dig into the winding. You can split pole groups and make many more options.

None of this is easy, I find it strange that people who are not prepared to do a winding will dive into something quite complex and confusing to rearrange connections. I am fairly happy to do a winding but I absolutely hate digging into an existing winding, I can't think of many things more confusing.

Flux

[kattos]

what options do i have with a european motor

[Flux]

I thought I covered that. You can use it star connected for high voltage ( most likely will need something like 100v battery. You can delta connect it and it may match a 48v battery ( possible 24v if you use little magnets).

If you want to go down to lower voltages then you will be forced to reconnect the pole groups. If it is 2 pole then you can halve the voltage by connecting the 2 coils per phase in parallel instead of series. With 4 pole you can use series parallel or full parallel. That may get you down into the region to match 12v.

Having split the pole groups you can still do star and delta changes on these so you have a lot of options ( and ends to sort out).

These sort of things are probably going to be best for something like 48v. Perhaps not so bad for 24v but a real nightmare for 12v.

Flux

[ghurd]

I assume you want to do a conversion without a rewind?

Depends on what you want.  50W, 250W, 1000W?  12V, 24V 48V?

Is the desire just a windmill making "power"?

If you don't want a lot of power and can live with lower efficiency, it should be OK to try what you have and see.

I am against myself rewinding.  It is good to know one's limitations. That is one of mine.

I slap (properly grouped) magnets in about anything and see what comes out, without a rewind.

I don't like having to deal with finding more than the star point, or sometimes the center of each phase.

It is not a great plan, but it almost always works.  At least a little.

Higher KW motors make less volts, but more amps once they get spinning fast enough.

Lower KW motors make more volts at lower RPMs, but the amps are limited.

Lower name-tag RPM (1000?) motors make less volts than higher RPM (1500?) rated motors, but the trade off is again less amps.

A 3 wire 415V motor will make more volts than a 3 wire 230V if the KW and RPM name tag is the same, but the trade off is yet again less amps in the 415V motor.

Six wires lets it be easily connected for star or delta (Jerry rigged works better than delta for me).

Twelve wire motors are better if available because the output voltage is more easily adjustable to suit the outcome.

Only use neo magnets.

More magnet means more volts and amps.

That will not make it simple to build a PMA suited to 2 meter dia blades running at 6.0TSR.  The blades need figured out after the PMA is done.

Maybe I am missing something about European motors.

I think Zubbly's (RIP) comments on making a conversion without a rewind would be valid in Europe, proportionally speaking.

G-

[kattos]

i use a 2.2kw motor 3phase 220/380 volts add 4 2x1x0.5 neos i get about 40 volts i had diffigalty to measure amps

[Flux]

That's not a lot of magnet so don't expect too much. You fail to give speed so your 40v is pretty meaningless.

If that sort of voltage is at a reasonable speed then it may suit 48v. Need more information to help much more.

Flux

[kattos]

i get 40 volts in low wints i have seen up to 60volts i am sure i can get more

[Flux]

If you already have it up and running then have you tried rectifying it and charging a battery. It may work quite well at 48v but if you try to use it at 12v you will get poor results. Is this what you mean by having difficulty measuring current?

Flux

[kattos]

i test it today the numbers i posted is rectyfied i try 12 volts battery and 36volts churging i cannot see the difference

[CmeBREW]

Hey Ghurd-

"Lower name-tag RPM (1000?) motors make less volts than higher RPM (1500?) rated motors, but the trade off is again less amps."

Isn't this statement backwards??  

I find lower 'rated RPM' makes MORE voltage, and higher 'rated RPM' makes less voltage.

[ghurd]

Yup.  Backwards.  Good catch.

G-