At the heart of IST's (www.istimaging.com) Ventus portable
high-temperature viewing and image recording probe is a Maxon
super-compact EC32 80W brushless motor measuring just 6cm in length and
weighing 260g. In this application the Maxon unit is directly couple to
an air motor and used as a generator to power the probe's camera module
and various displays. Compressed air or nitrogen is supplied to the
viewing probe via a quick-release coupling to effect cooling. Some of
this is diverted to the air motor, which turns the EC32, generating a
three-phase voltage output. This is subsequently smoothed and regulated
to provide the 12V dc internal supply.