Muller Dynamo

[gyulasun]

@groundloop and our other EE wizzkids

I can't remember if this has been mentioned before

I have been searching around for the Hall effect sensors and have found the A3144uea has been discontinued.

One of the manufacturers suggests the A1120EUA-T as an alternative

http://uk.rs-online.com/web/search/searchBrowseAction.html?method=searchProducts&searchTerm=A1120EUA-T&x=20&y=6

would you agree this is what we need?

Here is the manufacturer recommendation on replacement:
http://www.allegromicro.com/en/Products/Part_Numbers/3141/ 

so it is type A1104 which is available as replacement.

EDIT type A1120 is a more precise (chopper stabilized) type, probably more expensive, with the same voltage and 25mA output current ratings. So not really needed once the A1104 would do. Of course prices are to be compared, I do not know by heart...     ALSO: any such type should work like toranarod suggests above

Gyula

[hartiberlin]

@Groundloop.
You made your last correction for the magnet fields wrong inside the ferrite cores.

As red is North you just made the wrong polarity, so the magnet rotor will not be pulled into the core !

[Mem]

Here is my replication of a Muller Dynamo with few addons.

Muller generator magnets and coils were odd and even numbers. Like 17 magnets and 16 coils (or something like that) Looks like you created your own version.
ROMEROUK GENERATOR

[bourne]

Here is the manufacturer recommendation on replacement:
http://www.allegromicro.com/en/Products/Part_Numbers/3141/ 

so it is type A1104 which is available as replacement.

EDIT type A1120 is a more precise (chopper stabilized) type, probably more expensive, with the same voltage and 25mA output current ratings. So not really needed once the A1104 would do. Of course prices are to be compared, I do not know by heart...     ALSO: any such type should work like toranarod suggests above

Gyula

Its only a minor detail but thanks for clearing that up Gyula

[woopy]

Voili voila

thanks Romero another time , so i made my rotor at 20 cm diameter 1 cm thick in POM ( polyacetal ) and please in a green color. just for fun !

The magnets are 20 mm diameter and 10 mm thick,

For the interested , the CAD program is TURBOCAD. Very easy to use

good luck at all

Laurent