Controlling AC motors
Hi. Ive got some 240V AC motors. When they power up they can spin either way and it appears to be random which way they actually spin. Is it possible to make them spin in a certain direction? Could it have something to do with the AC sine wave? Maby the direction depends on where the sinewave is when the motor powers up
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didn't you forget the starting capacitor somewhere.... ???
Alain
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Theres no external capacitors or anything on these motors. Should there be?Originally Posted by Acetronics
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If the motors are not 3 phase then they will have a starting cap or in small motors could have a starting winding that drops out at a certain speed.
You are correct about the sine wave, that is why the above is needed.
Dave
Always wear safety glasses while programming.
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ok. there must be one built into it. does that mean it is or isnt possible to control the direction?
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Do you have the make and model number of the motor?
Dave
Always wear safety glasses while programming.
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