A quick question for a problem.
I discovered a small motor in my box of motors that had a plastic fan on it good to use as a blower or turbine. It must be from a hair drier or something similar. The motor does not have any label on it so I have to guess its for 3, or 6 or 12V. I test it already and my best guess is for a 12V from the sparks on its pins and how fast it is turning.
This is how is looking:
I test it all this time only at 5V but no matter what voltage I use, 2V, or 5V or 12V, it is always drawing 3A - yes 3A!!! I am using my variable PSU that goes up to 5A maximum and it is showing me on its electronic screen the consume of the load I plug into.
I open up the motor, I looked inside, I clean a little bit of dust, but nothing really shows me any kind of visual damage.
So it either must be some kind of electrical trick I don't know, or it is broken beyond repair. The motor spins fine and happy though. But is drawing so much current that its contact are getting very hot and I can smell the hot metal. I test it for a few seconds and I can tell all of these little details and observations.
- If you encounter such a problem in the past... please tell me what must be the cause.
- I will do everything you will tell me to check or to build !
Also, it had a rectifying bridge made from discrete diodes 1N4004 originally on its contacts, but I remove it. I tested with them and without them and they dont really change anything. They are there from it's original construction (probably), to rectify a 12VAC (most probably). It didnt had any filter capacitor on its pins though... It looks like is made in 1980 the whole construction and assembly.
Thank you !
I discovered a small motor in my box of motors that had a plastic fan on it good to use as a blower or turbine. It must be from a hair drier or something similar. The motor does not have any label on it so I have to guess its for 3, or 6 or 12V. I test it already and my best guess is for a 12V from the sparks on its pins and how fast it is turning.
This is how is looking:
I test it all this time only at 5V but no matter what voltage I use, 2V, or 5V or 12V, it is always drawing 3A - yes 3A!!! I am using my variable PSU that goes up to 5A maximum and it is showing me on its electronic screen the consume of the load I plug into.
I open up the motor, I looked inside, I clean a little bit of dust, but nothing really shows me any kind of visual damage.
So it either must be some kind of electrical trick I don't know, or it is broken beyond repair. The motor spins fine and happy though. But is drawing so much current that its contact are getting very hot and I can smell the hot metal. I test it for a few seconds and I can tell all of these little details and observations.
- If you encounter such a problem in the past... please tell me what must be the cause.
- I will do everything you will tell me to check or to build !
Also, it had a rectifying bridge made from discrete diodes 1N4004 originally on its contacts, but I remove it. I tested with them and without them and they dont really change anything. They are there from it's original construction (probably), to rectify a 12VAC (most probably). It didnt had any filter capacitor on its pins though... It looks like is made in 1980 the whole construction and assembly.
Thank you !
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