New drill-1PH to 3PH wiring

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New drill-1PH to 3PH wiring

This topic has 8 replies, 5 voices, and was last updated 10 March 2019 at 13:52 by Trevor Drabble 1.

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9 March 2019 at 20:14 #399449
David Siddle 1
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@davidsiddle1
Hi. I've just bought myself a decent Fobco Star, fitted with the original dual voltage 3PH motor. I want to be able to run it from my normal 1PH supply through one of the cheap VFD's of the usual auction site. The one i've seen is rated for 0.45kw. My motor is 0.33HP, ie. 0.25kw. Is this OK? Also, I want to add a remote speed and direction control to assist tapping ops, and for convenience. I believe i need to wire the motor delta, but i'm not sure what voltage/current the parts for the remote control box should be. I'm assuming it would be a low voltage circuit? Forgive my ignorance, but i'm not electrically minded, and have never dealt with 3PH before.

Many thanks for any help.
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9 March 2019 at 20:14 #9572
David Siddle 1
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@davidsiddle1
9 March 2019 at 20:37 #399453
David Siddle 1
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@davidsiddle1
Actually, i've just found this guide on-line for a Siemens device. Looks like just the job to me, and the guide answers all my questions.

**LINK**

**LINK**

Anyone agree with me?
9 March 2019 at 20:39 #399454
Martin Cargill
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@martincargill50290
First you need to check that the motor on your drill can run at 220 volts three phase. Have a look at the nameplate on the motor and check that the voltage is rated for 400/220 volts. A 0.45 kw drive will be suitable for a 0.25kw motor.

The control circuitry will probably be 24 volt and does not handle any significant current, it is normal to make a control pod with start/stop/ direction and speed control. A light eight core cable is the norm for connecting the pod to the invertor. Your invertor should be mounted somewhere safe (inside a housing )where it will not have any chance of having swarf etc falling into it.

Martin
9 March 2019 at 20:42 #399455
John Olsen
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@johnolsen79199
The .45 kW inverter will be fine with your motor, a bit of spare capacity is not a problem. The motor will need to be wired delta. This is usually not a problem, unless the star point is buried inside the winding, but since it is a dual voltage motor it must be accessible. There is quite likely a little diagram, maybe inside the cover over the terminal.

The remote control parts will all be low voltage rated. Usually all you need is a couple of switches (forward/reverse and on/off) and a potentiometer for the speed. The latter is probably about 10k ohms, linear, but check what the instructions say, if you can decipher them! I made mine up in one of those small diecast boxes that the electronics shops usually sell.

No switches or plugs on the motor side, and preferably shielded cable there.

If you are not used to this stuff it might pay to find someone who has done it before to help.

John
10 March 2019 at 10:10 #399529
David Siddle 1
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@davidsiddle1
Thank you both very much for your help. I feel a little more confident now!
10 March 2019 at 10:26 #399535
David Siddle 1
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@davidsiddle1
Does anyone know where i might find a suitable wiring diagram? Off/On, forward/reverse and pot for the speed control?

Thanks again.
10 March 2019 at 11:48 #399558
Martin Connelly
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@martinconnelly55370
Wiring for the VFD is dependent on the make and model and is usually given in the associated manual. They are generally available on line.

Martin C
10 March 2019 at 13:52 #399581
Trevor Drabble 1
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@trevordrabble1
David ,

Sent you a PM .

Trevor .
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