Simon Silwal's posts

thanks Jon...

I have collected some data from my PMG while charging a 12v battery and I am not sure with them. The problem is battery charges with line voltage less than battery voltage. The issue sounds impractical but am i missing something here principally? the connection seems fine every time i check it.  
The star connected stator produces line voltage from 7.6v to 10.9v at increasing speed with its corresponding battery voltage increasing from 12.1v to 13.1v while battery charging(0.1Amp) starting at around 160 rpm at 9.1 line voltage.
could it be battery voltage suppressing the generated voltage. I was wondering how can the current flow in this situation?..

Thank you Jon for your suggestions. It was really helpful. 

hello again Jon...
Actually i am working in building a 300W wind turbine system using as much as resources available locally. So most of the components are homemade. You mentioned increasing the number of turns but that would increase the stator size. Right now the winding thickness is 1.8mm.
Would it be possible to slightly decrease the winding thickness and then increase the number of turns in order to increase the voltage.
Actually the generator needs to generate 150W at 400RPM. Mine just reaches half of it. I am having trouble figuring out the problem..

hello Jon,
Actually the short circuit current shows up with 17 amp at around 400RPM, but the battery charges with only 4.45 amp at the same RPM. Now there is not much wind at the site and the battery charging rate is very less.
Is there any way so that battery could extract more power from the generator at even low RPM. Right now it powers itself up to 56W at 400 RPM. it would have been great if the power level was same at 200RPM.

Recently I have constructed a permanent magnet generator that generates 368W at 400 RPM at no load and when loaded with
battery(12V, 135AH) produces only 56W at same RPM. The charging current is be very low which is appreciable for fully charged battery but the PMG easily produces more than 100W(13V, 8A) at 200RPM unloaded.

How can I extract more power from generator while charging a battery so that battery can utilizes the optimum power from the generator when available? Could anyone suggest some ideas...