01-03-2009, 11:54 PM
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Deity
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Join Date: Jul 2004
Location: Saint Regis Falls, NY, USA.
Posts: 4,978
Thanks: 0
Thanked 102 Times in 102 Posts
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a rheostat is fine where you control the speed of a dc motor but I wouldn't suggest it in an ac motor. for that a tapped autotransformer works best but these tend to be pricey. I got one for my bench testing that goes from zero to 130 volts ac. cost about $50. the can type "stat" is a klixon overload that uses a bi-metal switch. when it heats up it opens, when it cools down it closes.
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