How the the brush motor works

Рет қаралды 93,726

10 жыл бұрын

This one gives a basic operation of the brush motor. This video is part of the heating and cooling series of training videos made to accompany my websites: www.graycoolingman.com and www.grayfurnaceman.com to pass on what I have learned in many years of service and repair. If you have suggestions or comments they are welcome.
If you are a homeowner looking to repair your own appliance, understand that the voltages can be lethal, the fuels are highly flammable and high pressures are used. Know your limits.

Пікірлер: 50

@kpy3p 4 жыл бұрын

Just want to say THANK YOU for this video. I spent ALL DAY trying to figure out an electrical actuator I removed from my truck and couldn't figure out why it wasn't working. I watched your video and realized I didn't re-install the brushes into their pockets and now the motor is working 100% and you saved me $1200.

@theskepticalskeptic 4 жыл бұрын

That was a pretty decent explanation for the layperson. Ty

@grayfurnaceman 4 жыл бұрын

Welcome GFM

@MrPete20tong 7 жыл бұрын

Thanks for this. I'm trying to fix a brush shower motor, so real useful to understand how it works :D

@RR-gw2uj 3 жыл бұрын

Awesome video, I learned a lot, thanks for posting it!

@TheNormallyOpen 10 жыл бұрын

Thanks, it's very hard to imagine this stuff from books, I have forgotten a lot of my college motor theory, keep up the good work! All the best

@Physics072 Жыл бұрын

Motor theory without experience is like reading a book on how to play baseball but never actually hitting a ball or throwing one. No substitue for experience. I read a book on how to play the guitar and found that after reading the book I was terrible at playing. A kid down the block never read one book yet plays guitar with ease.

@robviolin1 9 жыл бұрын

Thanks for the info. I have learned that the more I know, the less I pay and can do the job myself.

@dcrickerson9775 10 жыл бұрын

Very nice video. Thank you.

@IMOLDIN 4 жыл бұрын

OK so I've a stuck brush I assume the armature is also damaged. Your video is very helpful. You are a king of KZfaq 🤣

@geojor 9 жыл бұрын

excellent, as always...

@ScoutCrafter 2 жыл бұрын

Excellent explanation! Thanks!

@jcstevegigs 2 жыл бұрын

Great explanation. I have an old B&D Grinder that suddenly started buzzing and got stuck. When its off it rotates but when I turn it on in magnetized and locks in place. I’ll try changing the brushes if I can find any.

@hardcooling 10 жыл бұрын

very nice explanation gfm

@umargul5644 3 жыл бұрын

Well done

@blackhornet3459 3 жыл бұрын

Thanks a lot...

@GhostvaperYT 7 жыл бұрын

GREAT VIDEO - how can i tell if my brushes need replacing? i have one of these motors in my disabled scooter.

@grayfurnaceman 7 жыл бұрын

You will need to remove them to check. If they need replacing, the commutator should also be machined to make it smooth. GFM

@steveg5576 10 жыл бұрын

What does shaded pole mean ?

@truetake 7 жыл бұрын

Thank you. Good work sirI have a question pls, I have a black and decker super sweep 8422, the problem is when I switch on it makes sound and it's stuck I tried to push the fan it didn't move at all but when I switched off I can move the fan very easy, I can record a video and upload it to watch it for more explanation it you want, I feel u have a great experience in this field.Thank and I hope u can help

@grayfurnaceman 7 жыл бұрын

This unit uses ball bearings. One of them may have lost its balls. You can replace the bearings, either from the factory or from a bearing shop. Hope this helps. GFM

@arneyjeff 10 жыл бұрын

Awesome video. Could an induction motor video be in the near future? Thanks Jeff

@grayfurnaceman 10 жыл бұрын

I will be doing a series on induction motors soon. GFM

@dhanyamariavarghese4398 7 жыл бұрын

What problem in carbon bresh fir

@bertdiver3708 Жыл бұрын

Great Video. I dont know why the world just throws thins away Please help with table saw motor RM827. Two of commutator bars are raised, thought maybe new brushes would fix it. If a resistance pattern to follow maybe i could do some solder trick. What Now?

@grayfurnaceman Жыл бұрын

New motor. GFM

@andysmechanical7825 10 жыл бұрын

Question GFM Does the computator originally have a wide groove in it for the brushes or is it originally flat and the brushes wear into it?

@bamaslamma1003 4 жыл бұрын

These motors also can run at very high speeds, tens of thousands of rpm for some types. A vacuum cleaner motor may spin 10,000 rpm, allowing a small fan to produce powerful suction. A router may run at 25,000 rpm no load speed. Can’t run that fast with induction motors that are limited to power line frequency, usually 1725 or 3450 rpm.

@fahrrurrozi686 2 жыл бұрын

Your explanation same like my friend.

@dstewart7470 4 жыл бұрын

Just recently bought a set of Milwaukee tools with brushless motors. These brush motors have served me well for years but I like the fact that there's less moving parts/less heat, and my understanding is that they should have more life...and help conserve battery life.

@Orc-icide 8 жыл бұрын

WHERE'S THE LINK?

@ArronAdams1990 8 жыл бұрын

What are the sings of the wearing out say on a drill?

@grayfurnaceman 8 жыл бұрын

+Arron Adams Either a burnout from shorted windings or bearing drag, possibly squeal. GFM

@rickrude6301 8 жыл бұрын

The rubbing of the brush to the copper would create ultrafine particles the could get into the air and get inhaled into the lungs. Certainly not to healthy, especially if used in a fan that moves air. Are induction motors brushless?

@grayfurnaceman 8 жыл бұрын

+Rick Rude They do not have brushes. GFM

@andysmechanical7825 10 жыл бұрын

thanks gfm

@loudpipesavelives69 10 жыл бұрын

It's pretty crazy how all modern cars have a brush type motor in the fuel pump inside the gas tank.

@grayfurnaceman 10 жыл бұрын

Its all about percentage of air to fuel. There is virtually no chance of enough air getting into the tank (and the motor) to cause an explosion. GFM

@bamaslamma1003 5 жыл бұрын

That and the fact that it’s submerged in liquid gasoline. Liquid gasoline does not burn. Only vaporized gasoline burns.

@bizim_eller 3 жыл бұрын

👍👍🙂

@Ellscreekhomestead Жыл бұрын

Anyway to turn this into a generator I'm new to it

@grayfurnaceman Жыл бұрын

Only if it has a permanent magnet. GFM

@Sage-qd6tf 4 жыл бұрын

Yep my sewing machine from 1949 goes ZOOOOOMMMMM when you first start stitching and then it goes z...o...o..o...o...o...m

@edgarperez6211 4 жыл бұрын

wut he say

@jairopiravaca4921 5 жыл бұрын

@lukesmith2725 3 жыл бұрын

This was incredibly confusing.

@Schlemiel-schlimazel 3 жыл бұрын

Lost me by 2:00. In fact, I feel like I know less!

@amecitox 2 жыл бұрын

You need the theory to undesrtand. If a current pass through a winding, it creates a magnetic field

@tomlapham5532 9 ай бұрын

All I wanted to see is what brushes do. This could have been five minutes shorter, I almost fell asleep.

@grayfurnaceman 9 ай бұрын

You need to get more sleep. You can't stay awake for 7 minutes? GFM