Yes my first attempt at designing a drill speed control using a triac ended
in tears due to the strange effects of inductance, as I recall.
Brian

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The Sofa of Brian Gaff...

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"Paul" wrote in message
...
williamwright wrote:
Yesterday I went to my daughter's with a load of wood. I was rewarded
with a very nice cottage pie (large portion), then, since it wasn't
raining Matt and I decided to do the right thing and cut the wood up
rather than just pile it in a corner and forget about it. Matt thought we
ought to use my chainsaw to save wearing his out (typical), so we did.
Unfortunately my chainsaw (Bosch 1750W) suddenly stopped working. All it
did was emit a loud buzz and some magic smoke. Not to worry; I've had it
for at least twenty years and it had done a lot of work, and the oiler
didn't work and the chain tensioner only just worked. (Later I dismantled
it out of curiosity and found that the front motor bearing had seized
absolutely solid. But surprisingly the gear wheels showed very little
wear and the motor brushes were still quite good.)
I don't know whether to get a petrol or electric chain saw. If electric a
constraint is that I want it to work from the genny, which is 2kW. The
bigger chainsaws are 2.5kW.

Bill

Here, a gentleman in the video, measures an electric chainsaw.
With the chain not moving, the peak input current is 50A on the
120V powered saw. The normal operating current is more likely
to be in the 15A range. That's at least a 3X multiplier.

https://www.tek.com/how-to/inrush-cu...ctric-chainsaw

The generator must be scaled a bit, to handle that surge
without stalling. If the generator is the same size as the
load, maybe it will stall out when you pull the trigger.

There is a Makita chainsaw with a "slow start" feature and
"motor current burnout prevention" type feature. But you're
paying the price of two or three chainsaws, just to make
your generator hold up.

The highest stall current I know of, is electric motors
that draw 10X the current at zero RPM. The electric chainsaw
measured 3X. Refrigerators, the estimate for the compressor,
is a stall load of 5X at startup. And an oversized generator
can help, with the transient load.

Some electrical loads, will even trip the the generator protection
device when the load is connected. So there is that possibility
to consider as well.

Paul