Andy Dingley wrote:
On 7 Apr 2006 04:53:48 -0700, wrote:
We're not tallking about stalling it. Running on a lower voltage and
hence at a lower speed will not damage a motor, all other things being
equal.
"All other things being equal", then yes. But the ratio of excess heat
to power output goes up somewhere between twice and 4 times (linear to
square law, depending on what the limiting factor of the drill design
is). As most hand-held power tools already run quite hot to keep their
size and weight down, you're either at risk of cooking the drill, or you
have to limit it to a far less powerful output..
Ac fans are routinely speed controlled, and just like drill motors
theyre cooled by their own blades. Fan motors stay close to the same
temp over a wide v range.
NT