How this electrical generator works?

[J_Nichols]

I bought some weeks ago an electrical generator that uses water pressure to produce electricity.
I have disassembled the generator and I don't fully understand how it works.

It is like this one:

The motor

I supose that there is a magnet somewhere that alternates between north and south when the piece in the right (the picture that has 2 pieces) rotates. There is only one magnet? maybe more?

 

[MaxHeadRoom78]

That appears to be built on outrunner style where the rotor is on the outside with the stator coils on the inside.
There should be a number of magnets on the rotor normally.
See the Fisher-Paykel motor for the motor version or any RC outrunner.
**broken link removed**
Max.

 

[J_Nichols]

That appears to be built on outrunner style where the rotor is on the outside with the stator coils on the inside.
There should be a number of magnets on the rotor normally.
See the Fisher-Paykel motor for the motor version or any RC outrunner.
**broken link removed**
Max.

Are you refering to this? (left one)
**broken link removed**

I have checked the link you have wrote and I understand a little bit better the concept. The magnet(s) must be on the rotor. But... there are small magnets like in the above picture or just only one magnet?
(this is a ferrite core, but I post the picture here to get an idea about how the magnet would look like)

 

[MaxHeadRoom78]

There has to be P.M. somehere probabally embedded.
Max.

 

[chemelec]

Curious, Where did you buy that from?

 

[chemelec]

There has to be P.M. somehere probabally embedded.
Max.

Post 3, I Assume the Picture on the LEFT SIDE is the Magnets.

 

[alec_t]

The rotor almost certainly contains a ring magnet with multiple poles. You can check the number of poles by running a paper-clip, nail, etc around the inside of the ring and counting the "notches" you feel.

 

[MaxHeadRoom78]

Post 3, I Assume the Picture on the LEFT SIDE is the Magnets.

Although that is for an outrunner RC motor, but his should be the same principle.
Max.

 

[J_Nichols]

Curious, Where did you buy that from?

In the internet. I want to use it to measure liquid flow in the motorbike,

 

[J_Nichols]

There has to be P.M. somehere probabally embedded.
Max.

Yes, but I think there are a few small ones instead of a single big one. I have tried to open the rotor but the plastic pieces are glued together.

 

[J_Nichols]

The rotor almost certainly contains a ring magnet with multiple poles. You can check the number of poles by running a paper-clip, nail, etc around the inside of the ring and counting the "notches" you feel.

Good idea, About 14... I have counted. Maybe there are 1 or 2 less because I have counted it quickly.

 

[chemelec]

In the internet. I want to use it to measure liquid flow in the motorbike,

Do you have a LINK to where you got it?

 

[J_Nichols]

Do you have a LINK to where you got it?

No sorry, check in eBay I have checked and you can find the device.

 

[J_Nichols]

A more detailed view

 

[chemelec]

No sorry, check in eBay I have checked and you can find the device.

OK, I found it now.