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davenn
Moderator
So why would you buy a 3 pin one when the original was 2 pin ?
You still haven't said what make and model of microwave oven ?
does the old motor have an info label on it ?
There was a thread either here or on another forum and it was determined that the third terminal on the fan motor was often used to drive the turntable motor (or was it the lamp - anyway...). The fan coil acts not only as the field for the motor but also as a transformer to reduce the voltage for the turntable motor (or lamp)
I see the motor is listed at 240 VAC. Is this going to be installed in a uWave on a 240 volt circuit? Then just measure the resistances between the three terminals, pick the 2 with the highest resistance, and hook them up.
I see the motor is listed at 240 VAC. Is this going to be installed in a uWave on a 240 volt circuit? Then just measure the resistances between the three terminals, pick the 2 with the highest resistance, and hook them up.
Found the thread I was thinking of: https://forum.allaboutcircuits.com/threads/microwave-fan-and-voltage-rating.155610/
Sir Bowmeat . . . . . .
All right . . . . . here is the full poop.
That GALANZ motor that you received is using the larger two terminals for your t 220-240-VAC power input.
There is the smaller end terminal for an optional derived secondary voltage output from the unit if you use the center terminal and the smaller for outputting a reduced 30VAC secondary output voltage,
That is obtained autotransformer style by utilizing the motor metal framework core, the shared existing magnetic field and an internal ratiometric tap off from the total winding, to get the reduced 30VAC.
(And NO . . . if you get the two wires reversed, it won't run backwards .)
This three terminals aspect wouldn't concern you at all, in starting with a TWO terminal motor, so use the two larger terminals.
73's de Edd . . . . .
I had amnesia once . . . . or was it twice ?
.
All right . . . . . here is the full poop.
That GALANZ motor that you received is using the larger two terminals for your t 220-240-VAC power input.
There is the smaller end terminal for an optional derived secondary voltage output from the unit if you use the center terminal and the smaller for outputting a reduced 30VAC secondary output voltage,
That is obtained autotransformer style by utilizing the motor metal framework core, the shared existing magnetic field and an internal ratiometric tap off from the total winding, to get the reduced 30VAC.
(And NO . . . if you get the two wires reversed, it won't run backwards .)
This three terminals aspect wouldn't concern you at all, in starting with a TWO terminal motor, so use the two larger terminals.
73's de Edd . . . . .
I had amnesia once . . . . or was it twice ?
.
davenn
Moderator
since you cant be bothered to answer questions properly
from the people that are trying to help you
You have made this way harder than what it needed to be !
I'm closing the thread
Thread reopened and other posted merged into this thread
(23/02/2020)
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Hi all I've replaced the cooling fan in my russel hobbs microwave .chànged the 2 plug motor to a 3 plug one . But been advised that's ok . Sorry for the late reply on my previous thread which got deleted . The new fan is now working . But it only starts with a clicking noise like a relay from a car .
. Tried up pics . But no joy
. Tried up pics . But no joy
davenn
Moderator
pic too small to be seen
Yeah, wasn't deleted, it was closed because the OP wouldn't answer questions from those trying to help him
Maybe he will do better now that I have reopened and merged the 2 threads
Sir Bowmeat . . . . .
Use an AC voltmeter and check across the two motor terminals to confirm that FULL AC line voltage is being there to run the unit.
Then, also pull the blade and test the running motor shaft for torque , using index finger to thumb gripping of the then naked motor shaft.
That unit should spin the multibladed fan blade easily, just being a bladed fan, considering it also is not experiencing any binding or constrictions.
ASIDE . . . . .
I saw Bowmeats information coming forth quite correct and timely . . . with one possibly only being thrown by the lower case Russel hobbs, branding .
Of which, that was being a brand that I had never " heered " of before.
Of course some people may have never " heered " of our lil' ole neighborhood store run by Stanley Marcus and his aunt Carrie Neieman . . . . . .
https://moneywise.com/a/20-outrageous-items-from-the-neiman-marcus-catalog
73's de Edd . . . . .
Man Fact . . . .
It's impossible for a man to use a stud finder . . . if having an observing audience . . . . without him initially first swinging it all around on himself and saying . . . beep - beep - BEEP - BEEP - BEEP - BEEP - BEEP !
.
Use an AC voltmeter and check across the two motor terminals to confirm that FULL AC line voltage is being there to run the unit.
Then, also pull the blade and test the running motor shaft for torque , using index finger to thumb gripping of the then naked motor shaft.
That unit should spin the multibladed fan blade easily, just being a bladed fan, considering it also is not experiencing any binding or constrictions.
ASIDE . . . . .
I saw Bowmeats information coming forth quite correct and timely . . . with one possibly only being thrown by the lower case Russel hobbs, branding .
Of which, that was being a brand that I had never " heered " of before.
Of course some people may have never " heered " of our lil' ole neighborhood store run by Stanley Marcus and his aunt Carrie Neieman . . . . . .
https://moneywise.com/a/20-outrageous-items-from-the-neiman-marcus-catalog
73's de Edd . . . . .
Man Fact . . . .
It's impossible for a man to use a stud finder . . . if having an observing audience . . . . without him initially first swinging it all around on himself and saying . . . beep - beep - BEEP - BEEP - BEEP - BEEP - BEEP !
.
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