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Sam Goldwasser
 
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"James Sweet" writes:

"Sam Goldwasser" wrote in message


While most induction motors are run at nearly constant speed, for shaded
pole motors with a light load like a fan, the torque and thus speed can

vary
from near zero to almost synchronous speed based on input voltage. I use

a
Variac to control my window fan. It works very well.


As will a simple light dimmer in most cases, though some don't like driving
inductive loads. Speed controllers for shaded pole motors are widely
available and they're nothing more than a triac dimmer circuit.


Though they will probably have some slighlty modified phase characteristics
when called a motor controller. For a very small shaded pole motor load,
a normal light dimmer may behave strangely.

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