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#1
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Hi guys, i have an 2HP / 220v AC motor and i want to lower the RPMs because are too high for my work. THe motor are running at 3000RPM, i want to controll the speed. Exsit some circuit that let me do that? Thanks in advance, |
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#2
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| If the motor is a standard induction motor the only way is with a Variable Frequency Drive (VFD) and running the motor on a frequency lower than the design frequency in which case you will also lose some power.
__________________ An open mind is a virtue...so long as all the common sense has not leaked out. |
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#4
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| http://www.anaconsystems.com/text/opti_e2.html To control a single phase AC induction motor is very expensive and not sure if they go up to 2.0 HP. To control a 3 phase motor--$200-$300 for a VFD (variable frequency drive) and can be powered from 220VAC single phase. |
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#5
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| You did not mention if it was 1ph or 3ph, 1 phase split phase induction motors are hard to control speed wise as they tend to fall out of run at low rpm or especially when a load is applied. If you want 3 phase VFD design notes, I suggest you try some of the Semi manufacturers app notes, Freescale (motorola) Allegro, National Semi, etc. Al.
__________________ CNC, Mechatronics Integration and Machine Design. “Logic will get you from A to B. Imagination will take you everywhere.” Albert E. |
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#6
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#7
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In that case, I would not even try. You are better off looking for a 3 phase motor or a DC brushed motor that you can control/build a mains operated SCR drive. Al.
__________________ CNC, Mechatronics Integration and Machine Design. “Logic will get you from A to B. Imagination will take you everywhere.” Albert E. |
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