Measuring Amps on output coils

[nathanj99]

Hi

I have built a wheel with 16 magnets around it much like the bedini SG. I put a coil on the bottom with no other electronic components just to see if I could get anything from the coil. I have connected my mulitimeter to the coil. When i spin the wheel by hand I may get about 10 milliamps but it is not constant. However when i spin the wheel fast I get no reading at all! Only when the wheel is moving slowly can i get about 30 miliamps. Can someone explain what I am doing wrong. Once the wheel just about stops turning the wheel will start to speed up again. I guess this is the energy in the coil doing this?

I am on a very steep learning curve, so would appreciate any advice.

thanks

Nath

[FatBird]

How many turns on the coil, & what gauge wire are you using?

Can you post a picture of it?
                                                                                                                .

[mscoffman]

Maybe, coil wires and magnetic flux lines are not cutting each other. Show diagram.

[burnit0017]

Hi, what is the wire size and number of turns on the coil?

[gyulasun]

Hi Nath,

Perhaps your digital multimeter is not able to show the higher than 50 or 60 Hz AC current? just guessing and you could check this by using a full wave diode bridge to rectify the AC voltage and use your meter in DC volt range across the diode bridge output where you also attach some hundred microFarad puffer capacitor for some filtering too?
If this sounds double dutch to you just search the web for full wave rectifier circuit with a puffer capacitor and you will be ok.

Gyula