switching a Hoover motor from 120v to 220v

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switching a Hoover motor from 120v to 220v

This topic has 5 replies, 4 voices, and was last updated 1 March 2017 at 04:53 by John Olsen.

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28 February 2017 at 01:48 #286384
robert wentzel
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@robertwentzel73963
I need to have my Hoover motor, currently set up for 110v to run on 220v . There is a plate on the motor showing the 2 wiring options, but I fear it's the wrong plate for my motor as it shows colored wires, whereas I have only numbered wires. Running on 110v the wires are as follows: numbers 1 2 8 are tied together, as are 3 4 5 . The plate shows switching 8 and 5 to reverse rotation, maybe thats correct? How do I group the wires for 220v operation? The motor is 1 1/2 HP, TYPE KP Motor number is 5690JK16862

I am working on an air compressor project. Thanks for any help!
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28 February 2017 at 01:48 #31881
robert wentzel
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@robertwentzel73963
hoover 1 1/2 HP single phase
28 February 2017 at 08:34 #286396
Brian Oldford
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@brianoldford70365
You may find the information you are looking for here http://forums.azbilliards.com/showthread.php?t=196767
28 February 2017 at 10:06 #286404
john fletcher 1
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@johnfletcher1
I have a circuit diagram of your motor but it to has coloured wires not numbered ones. Inside your motor there are three separate windings(coils).Two of almost identical resistance are connected in SERIES for 220 volts and parallel for 110.The third is the start and it is connected to the junction/ mid point of the two run windings, so it gets its correct voltage. The start winding will have the centrifugal switch in series with it and maybe a capacitor. So, if you have a multi meter set it on the low ohms range you might be able to sort it yourself. Separate all wires, locate the two nearly identical resistance windings and label them, same again for a second pair. A third winding with a higher resistance will be the start winding. Connect the two run windings in series and at the junction connect one end of the start winding, the other end to the neutral. Here a bit of trial and error needed as the last connection might be the live not as I said the neutral . Next be extremely cautious, have a friend standing by, connect the motor to the electric supply.If the direction of rotation is in correct swap over the stat winding connections. John
1 March 2017 at 02:27 #286528
robert wentzel
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@robertwentzel73963
Thank you for the helpful reply, but unfortunately we were unable to solve our problem. My wires are as follows: #8 and #5 go to the 2 capacitors (start?), #1 and #3 are one coil, #2 and #4 the other coil. We tried tying #3 #8 #4 together, then put line #1 to wire # 2, the other line being connected to #1 and #5. With the compressor NOT connected to the motor, the motor will start and run, altho acts as if the start circuit is not working, and if compressor is conned, motor will just growl! The motor with compressor started and worked fine on 110v, but because my garage circuit breaker panel has only 20amp breakers, the breaker would trip when the compressor had built up 75 PSI as motor used closer to it's 22 amp rating. The motor ID plate says motor draws 11 amp when wired for 220v. Any thoughts on getting this wiring in the right order? Thanks, Bob
1 March 2017 at 04:53 #286529
John Olsen
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@johnolsen79199
Hi, I have no information on this particular motor, and so hesitate to rush in. However….From what you say there are two coils. They would be connected in parallel for 110V operation, and in series for 220. However they will also need to be connected in the correct sense, so that they are not opposing each other. There is more than one way of doing this…. like this:

#1 Coil #3—-#2 Coil #4 or alternatively

#3 Coil #1—-#2 Coil #4.

One of these would work and the other wouldn't…but I have no way of knowing which is correct. If you know how they were connected earlier, when they were in parallel, you can work it out. The two coils will have each had one end connected to the incoming phase, and the other to the return. You leave one end of one coil connected to phase, and one end of the other coil connected to return. The other two ends get connected together.

Make sure that the capacitors are rated for the higher Voltage. Also it is possible that you should be reducing the capacitance for the higher Voltage. You would need the motor specifications to find that out.

Remember to be careful with this stuff, it can bite.

John
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