Winding configuration question
Winding configuration question
(OP)
Hello Folks
We let the smoke out of a 230V Drive cooling fan motor, one leg is neutral the other 230VAC for a Heidelberg printing press . Sent it out for rewinding and it came back looking really nice however when I energized it, no joy! It just hummed and I felt resistance while nudging it in either direction, it behaves like the fields are working against each other, otherwise while not energized manually it spins real nice. Should we have made ourselves more clear about it being a European motor? Could they possibly have wound it differently assuming it was a NEC application where the two legs are hot and this might require a different winding configuration then one leg hot?
Chuck
We let the smoke out of a 230V Drive cooling fan motor, one leg is neutral the other 230VAC for a Heidelberg printing press . Sent it out for rewinding and it came back looking really nice however when I energized it, no joy! It just hummed and I felt resistance while nudging it in either direction, it behaves like the fields are working against each other, otherwise while not energized manually it spins real nice. Should we have made ourselves more clear about it being a European motor? Could they possibly have wound it differently assuming it was a NEC application where the two legs are hot and this might require a different winding configuration then one leg hot?
Chuck
RE: Winding configuration question
most Europe N/Fas 230V AC 50 Hz,
US N/Fas 120V AC 60 Hz
Did it not say that on the motor plate?
/A
“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein
RE: Winding configuration question
Single phase or three phase supply?
Is there a Variable Frequency Drive involved?
Motor Horsepower?
Can you give us a picture of the motor nameplate? (Use the Image icon to upload a picture.)
Bill
--------------------
Ohm's law
Not just a good idea;
It's the LAW!
RE: Winding configuration question
Muthu
www.edison.co.in
RE: Winding configuration question
Of course, it could be the capacitor was also freed of some smoke
TTFN (ta ta for now)
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RE: Winding configuration question
In haphazardly answering the OP's questions without knowing the above, here are some answers:
Should we have made ourselves more clear about it [the motor] being a European motor?
Answer:
The motor's origin has nothing to do with the rewinding of the motor.
A motor winder relies upon what they find in the slots for their rewind project.
The country of origin has no factor attributed to it's repair.
Could they possibly have wound it differently...?
Answer:
Yes.
(But did they?)
The audience here will never know.
But here's another "but".
In this 21st century of everything under a microscope, what motor repair shop would repair a motor and not test run it before
releasing it to the customer?
John
RE: Winding configuration question
Single phase, no vfd, no capacitor, no data for HP attached is pic of data plate the portion shown is for cooling fan motor.
Chuck
RE: Winding configuration question
Which motor is within the scope of the discussion?
The motor pictured with the clean fan blade, or the motor shown with an aluminum stator housing?
John
RE: Winding configuration question
That may cause a loss of torque and an end thrust that nay be causing some binding.
This may be a shaded pole motor and not have much starting torque at the best of times.
Bill
--------------------
Ohm's law
Not just a good idea;
It's the LAW!
RE: Winding configuration question
Muthu
www.edison.co.in
RE: Winding configuration question
On this side of the big water CW/CCW, Clock Wise or Counter Clock Wise is often used.
Bill
--------------------
Ohm's law
Not just a good idea;
It's the LAW!
RE: Winding configuration question
The motor plate states that the motor is three-phase. What about that?
RE: Winding configuration question
/A
“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein
RE: Winding configuration question
Muthu
www.edison.co.in
RE: Winding configuration question
The right side of the plate it says
Motor 3 ~ phase
(Lufter) Fan, 230 V, 0,6 A, 50 Hz
(Breamse) Break, 24 V ??, 1,4 A, 40 Nm
There is nothing indicating on the plate that it is 1 phase.
/A
“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein
RE: Winding configuration question
3-ph shown is for the main motor driven by VFD.
Going by two black supply wires, the cooling fan is single phase.
That's all I got.
Muthu
www.edison.co.in
RE: Winding configuration question
If the orange arrow also is a cable.
But OP sade it was two, but without a capacitor it wouldn't work, but maybe it is placed inside the fan motor so it can't be seen?
/A
“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein
RE: Winding configuration question
And, by the way, a 50 Hz fan running on 60 Hz may be expected to fail sooner or later.
If the motor is oversized for the fan at 50 Hz, then it may be acceptable.
Bill
--------------------
Ohm's law
Not just a good idea;
It's the LAW!
RE: Winding configuration question
Redsnake, there is a three lead set for supply but one wire not used (not my design) good observation though. Edison, this particular Drive pulls paper off of a web roll so while motor is idle the brake keeps tension on paper. Bill, I have installed a lot of motors this should have been plug and play,we are sending it back to shop.
Chuck
RE: Winding configuration question
Have a hard time seeing how they could have missed it though.
Gents and girls.
/A
“Logic will get you from A to Z; imagination will get you everywhere.“
Albert Einstein
RE: Winding configuration question