Reduce speed of an ac motor.
Reduce speed of an ac motor.
(OP)
Can I control the speed of an ac motor by using a rheostat?
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Reduce speed of an ac motor.
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RE: Reduce speed of an ac motor.
RE: Reduce speed of an ac motor.
1 phase motors are a different story because they come in many types and designs. One of them, a "Shaded Pole" motor, can be controlled with a rheostat very successfully, that is typically what a ceiling fan is. A "Universal Motor" such as those found in a portable drill APPEAR to be an AC motor because the DC conversion is done inside the unit, and they too can be speed controlled from the outside with a rheostat, although most already have speed control as part of the system anyway (that is why they used that kind of motor). Any kind of capacitor start motor however will not work well as pointed out by OperaHouse, and they comprise the vast majority of off-the-shelf 1 phase AC motors.
"Venditori de oleum-vipera non vigere excordis populi"
RE: Reduce speed of an ac motor.
You can not vary the speed of a standard cage typ induction motor with variable voltage as this will cause a very high current and motor damage.
Best regards,
Mark Empson
http://www.lmphotonics.com