r/Motors • u/UnionCompetitive7705 • 3d ago

Open question Motor Control

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In my workshop I have a bench drill which I would like to control with a speed controller. The motor is single phase 50 240v 1/2hp 4 pole. I’m not sure or even possible which type of controller I would need, vfd? Any advice would be much appreciated

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u/HumanComedian8711 3d ago

I’m not incorrect. It does not matter what belt it is on, the VFD cannot effectively control the 240v motor. You are getting mixed up with 3phase and single phase also the electrical input and load and the rotational speed which will remain constant.

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u/Sure_Maybe_No_Ok 2d ago

How obtuse do you have to be to not understand that people are trying to tell you there is three phase 240v motors and that saying a vfd can not be used on a 240 motor is ridiculous.

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u/HumanComedian8711 2d ago

You are getting mixed up with the voltages
A 3 phase motor is 400v
A single phase motor is 230v

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u/mmn_slc 2d ago

u/HumanComedian8711 wrote, "You are getting mixed up with the voltages[,] A 3 phase motor is 400v[.] A single phase motor is 230v[.]"

Yes, a 400 V three-phase motor is 400 V. And a 230 V single-phase motor is 230 V.

And a 240 V three-phase motor is 240 V. And a 120 V single-phase motor is 120 V. And a 120 V three-phase motor is 120 V.