Here is few things I found on the subject http://mysite.verizon.net/vze49gsg/
here is another product from sullivan for nitro/gas engine alternators in rc plane picture of it mounted here is some thing many of us might lke to power rc and video tx on board
BTW the same question was asked in rc forum almost 6 years back
The other issue with using PM motors as alternators is that the voltage varies with the shaft RPM and load. These days that's easy to solve with a wide-input DC regulator. Here's the spec sheet on a TI unit we've used in the lab:
You want DC out, right? You don't need to "convert" the motor. Remove the ESC, you won't use that. Connect a 3-phase bridge rectifier. Add some filtering. Spin the motor. Fast. Look at the output.
If you can't find a 3-phase bridge, make one with 6 diodes of sufficient voltage and amp rating.
Replies
http://mysite.verizon.net/vze49gsg/
here is another product from sullivan for nitro/gas engine alternators in rc plane
picture of it mounted
here is some thing many of us might lke to power rc and video tx on board
BTW the same question was asked in rc forum almost 6 years back
http://focus.ti.com/lit/ds/symlink/ptn78020w.pdf
If you can't find a 3-phase bridge, make one with 6 diodes of sufficient voltage and amp rating.
Hope you grok ASCII art:
|----->|---------A--------->|----|
|----->|---------B--------->|----|
|----->|---------C--------->|----|
| ---------- (-) load (+) ---------|
A, B, C are where you connect the 3 wires from your brushless motor.