Need to know the type of motor

Thread Starter

Nimantha

Joined Jan 7, 2021
2
Can you help me to figure out the type of the below shown motor (motor diagram, nameplate, controller). It has 5 wires coming out and used for speed controlling of a kitchen range hood. I need to fix an error of not adequate speed in this device. Can you also suggest reasons for issue in speed.
Thanks in advance!!
 

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MaxHeadRoom

Joined Jul 18, 2013
21,984
The first is an variable speed AC induction motor, the second is a power supply and relay bank, the third appeas to be a stepper maybe, going by the number of leads.
How are you powering the one in your question?
Max.
 

MaxHeadRoom

Joined Jul 18, 2013
21,984
If the question is for the same motor, it could be the switching method is not working, if it is supposed to be one of the relays, then check the circuit board and measure each relay action with a meter.
Max.
 

LesJones

Joined Jan 8, 2017
2,837
Another possibility is the bearings (I am assuming sintered bronze bearings.) have become sticky. This could be the original oil becoming sticky or grease that has got past the filters in the cooker hood.

Les.
 

Thread Starter

Nimantha

Joined Jan 7, 2021
2
If the question is for the same motor, it could be the switching method is not working, if it is supposed to be one of the relays, then check the circuit board and measure each relay action with a meter.
Max.
All three pictures for the same motor. we replaced the circuit board too. Can the problem be inside the motor in the windings or with debris collecting. Thank you!
 

MaxHeadRoom

Joined Jul 18, 2013
21,984
All three pictures for the same motor. we replaced the circuit board too. Can the problem be inside the motor in the windings or with debris collecting. Thank you!
Possible as Les said, the sintered bronze bearing may need to be cleaned and re-soaked in oil, try using ATF for lube, it stands up to heat.
Max.
 
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