Electric motor sound
Electric motor sound
(OP)
Hi all
I would like to check what make he sound of electric motor sound like jet engine?
YouTube link to electric motor sound - http://youtu.be/OzS-ITrE4lo
I am actually having a Washing machine at home and during the final spin there is a jet engine sound. Even when I go to my friends house, all machine is the same. Hence I am curious how the sound come about. I try search online and doesn't find any thing related to it only electric motor. But how does it make the sound? Is it by air flowing through the fan motor? But it doesn't seems like there is fan motor for washing machine motor.
Hope someone can help me and clear my doubt. Been searching for many days.
Thanks in advance
I would like to check what make he sound of electric motor sound like jet engine?
YouTube link to electric motor sound - http://youtu.be/OzS-ITrE4lo
I am actually having a Washing machine at home and during the final spin there is a jet engine sound. Even when I go to my friends house, all machine is the same. Hence I am curious how the sound come about. I try search online and doesn't find any thing related to it only electric motor. But how does it make the sound? Is it by air flowing through the fan motor? But it doesn't seems like there is fan motor for washing machine motor.
Hope someone can help me and clear my doubt. Been searching for many days.
Thanks in advance





RE: Electric motor sound
It is normal for a motor to make a little fan noise at or near its maximum speed.
It is possible that different washing machine makers use different motors, and adopt different strategies for controlling or suppressing noise.
If you can find another washing machine that is _exactly_ like yours, and yet makes a different noise, then you may have a problem. ... probably not.
Mike Halloran
Pembroke Pines, FL, USA
RE: Electric motor sound
Thank you for your reply.
Am I correct to say that all electric motor contain a fan or something to cool the motor. With this, as air pass through the fan in high speed it produce the engine sound. Something similar as jet engine aircraft when air passes through.
I saw some washing machine doesn't seems like there is fan on their motor. eg LG direct drive motor. I saw only stator and rotor. Unless the behind rotor casing got some hole is for air to enter and to cool it.
RE: Electric motor sound
Washing machines usually have plenty of water going through them. (Hint.)
RE: Electric motor sound
Thanks for the info. But why does washing machine have plenty of water going though the electric motor. It is not a water pump. Only for drain pump.
Actually my main concern is how does the engine sound car like. Previously my conclusion is having a cooling fan. And cooling fan at high speed products this sound. I also search online about cooling fan at high speed and indeed is jet engine sound. But I notice some washing machine design are using direct drive which there is any fan and I believe is like what you mention, have a mean of cooling. And with this mean there is air flow passing through it from the inside to the outside. Hen again at high speed the sound appear again.
Btw what you mean by good thermal conduction path? Any example? Thanks for the help.
RE: Electric motor sound
For a washing machine that is made in large numbers, you can be certain that the cheapest possible motor configuration that the manufacturer can get away with, is what the machine has.
RE: Electric motor sound
Even the ẃindings of the motor give off an electrical hum.
Add to that the driven components (drum,pumps etc) and associated bearing surfaces,it can get a bit noisy.
A 'dry' bearing spinning at over 3000 rpm can sound like a 747 taking off .
Plus the casing of the washing machine can amplify the noise.
RE: Electric motor sound
I have attach the picture of Lg direct drive motor. This is the part of my concern where how the jet engine sound came about.
RE: Electric motor sound
Below YouTube link for the engine sound that I am very curious with of how it came about
http://youtu.be/5nboONIMetA
Link copy using iPhone. Btw so this sound is came from
Bearing and not the air flowing pass the cooling fan ?
RE: Electric motor sound
Keith Cress
kcress - http://www.flaminsystems.com
RE: Electric motor sound
Bill
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"Why not the best?"
Jimmy Carter
RE: Electric motor sound
RE: Electric motor sound
Thanks for all the support.
At least my conclusion is that the jet engine sound come from fan.
Or air moving pass high speed stationary object will generate this jet engine sound. Secondly is maybe bearing at high speed also create the jet engine sound.
Although the i can't find any article on this. But through all the post above. I believe this is the answer.
RE: Electric motor sound
As the motor spins, these rotor protrusions pass very closely by the stator poles, pushing the air out of the way. After it passes by, air rushes in again to fill the gap. (This does not happen in the permanent magnet motor design you showed.) At the high speeds of the spin cycle, this happens quickly and often, and it can be very loud. High acoustic noise from SR motors operating at high speeds is a common complaint in consumer applications. But they are inexpensive!
RE: Electric motor sound
Mike Halloran
Pembroke Pines, FL, USA
RE: Electric motor sound
The motor look something like this as attach. The picture is I found online on the supplier website.
RE: Electric motor sound
(2nd picture -9th Jan - not a direct drive !)