too much RPM on a clothes dryer

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norberto fines

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hi there,

does anyone know how to slow down the rpm of an induction motor used in a clothes drier. Someone gives me a used clothes drier . I immediately tested it and found out that after an hour, the clothes still has moisture. I later found out that when the tumbler spins, the RPM is too much that the centrifugal force keeps all the clothes sticking on the outer casing, thus preventing the hot air to pass through the clothes. I found out that the drier is designed to operate on 50hz. We are using 60 hz in our place. Is there any means to slow it down a little bit. The motor is 1/2 hp with centrifugal switch 4pole.
thanks, norbert
 
You cannot slow it effectively my electrical means. As the drum is almost certainly belt driven, the best way would be to reduce the pulley size.
 
The simplest way to change the speed of the dryer is, in fact, not electrical! Simply change the sprocket on the motor shaft for a smaller diameter one (I know it's not really a sprocket, but I can't think of it's proper name)
 
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