All cordless power tools use Brushless DC motors. The emphasis is on DC. Batteries provide DC power.
Universal motors with carbon brushes are needed when you want to run a motor from AC power. That’s what the commutator is necessary for. AC power means with a cord for domestic sockets.
Look, I’ve just crammed a pile of textbooks for the electrical engineering course (which is an academic course here) into my head on electric motors and electric drives. So if you can tell me exactly which brushless motor should be in a dry/wet vacuum cleaner, then I can think about it.
As for the video, it says that all motors in this series have been fitted with serviceable brushes since 2016 (so it’s normal that the video is seven years old). Literally, that’s what the video says.
If you want to believe you’re getting a wet/dry vacuum cleaner with a brushless motor here, you can of course believe that. I just wanted to help, to make no wrong buying decision.
Aiph5u - many cordless battery powered (dc) tools are brushed. Yes, there are brushless battery powered tools but they are relatively new.
All the major manufacturers still sell brushed cordless (maybe old stock).
yes, there exist brushed DC motors, but they have been displaced by DC brushless motors in most applications. And what we talk about here, is something different, it is the motor of an AC powered device, so I found this not relevant.
The commutator with its carbon brushes in a universal motor has the purpose to make the rpm speed of the motor independent of the AC frequency, so that you can have a speed regulator as found on the Makita hand trim router, the 43 mm “Euromount” milling motors, and the most workshop vacuum cleaners.
With modern electronics it is now easy to build a brushless motor (EC = electronically commutated) which runs on line voltage. And Nilfisk is exactly doing that. The ATTIX-50 can be ordered both in a standard and in an EC version.
Yes, it is a bit more expensive, about € 800,- for an ATTIX 50-21 PC and €2.150,- for an ATTIX 50-21 PC EC.
I don’t want to link to Nilfisk dealer sites, so ask a search machine of your choice.
Der EC-Motor des ATTIX 50-21 PC EC ist ein bürstenloser, langlebiger Motor. Ein verschleißarmer Betrieb und die zündquellenfreie Bauweise sind nur zwei von vielen Vorteilen.
The EC motor of the ATTIX 50-21 PC EC is a brushless, durable motor. Low-wear operation and the ignition source-free design are just two of its many advantages.
You are right! Learned something new, would never have thought that a wet/dry vacuum cleaner would use such a motor.
As to expect, the price difference (€ 800,- vs. €2.150,-) is really heavy.
yes, it is the information that lacked here! I did not see that there existed wo models. And yes, the Nilfisk site does not provide much or detailed information about the motor. Thank you again, Joergen @dumbo! But Martyn @Pi3man also mentioned already a bit above that there are two different models, one being much more expensive:
So according to the price difference Joergen pointed us to, you ordered the one with a universal motor with carbon brushes, and not the one with a brushless motor. If you really want to get the brushless shop vac, I hope you can modify your order.
Wow sorry to here that hope your back on your feet. What kind would you suggest as I need to get things the first time and not waste money thanks martyn
Just as a tip, I want to mention that you can run 2 or 3 shopvacs in parallel to get more air flow. I have a large shopvac in my shop with a cyclone separator, just one. Shopvacs produce more suction, which is good for more narrow 2.5 inch ducts, but less air flow. If you want more air flow you can attach a second shopvac using a coupler. I did not do it in my shop, but I did use 3 shopvacs when I was working with insulation in my attic. I had to put them on two separate circuits and used 4 inch hoses. That was a lot of suction with a lot of air flow. I ran them for 8 hours a day for 5 days straight. I did 3 sessions like that all together.
Right ok ,I was goin to go with the nilfisk attix 50 but don’t if they will get filled to quickly even with a cyclone. And people say why dont you get a big like the# AXMINSTER WORKSHOP AW118CE CYCLONE DUST EXTRACTOR - 230V
Sorry don’t no why all the writing has changed lol
strange idea. Why use many shop vacs if you get a dust collection system with an induction motor at Harbour Freight for $299. Okay you’ll have to add the cartridge filter to get an acceptable wood dust filtering.
Shop vacs that run permanently like when used in a CNC will make replacing carbon brushes within less than a year.
this person owns a Jet dust collection system with an induction motor and a big cyclone separator that looks a bit like the Axminster AW118CE, but now replaces it with a Felder AF 22
I will buy this one too. It’s made in Austria and the motors are made in Italy. What I like is how easy it is to change the chip bags during operation, and the choice of different motors.
Simple. If you cannot or do not want a dust collection system. It is also much more portable, and you can add / remove vacs, if you need to. Also, this may be a solution, one of many.
Personally, I like it because it provides much more suction power. Dust collectors move a lot of air, but only if the air resistance in the system is low. The pressure drop they create is lower than the pressure drop of a shopvac. Thus, if you have resistance in your collection system, such as 2.5 inch ducts, shopvac may even provide more air flow at the collection point than a dust collector.
I am not saying, that a dust collector is bad, simply an option.
My shopvacs, all of them, have HEPA filters installed. The dust collector you pointed out protects the machines, not your lungs. Can you have a HEPA filter for it? How much would this add to the price?
Regarding the Felder AF 22, you have seen in the link and in the videos that they have a big filter cartridge. They have dust class “M” which corresponds to what you call “HEPA” in the USA.
Regarding the Harbour Freight, I have seen many people that added a filter cartridge of “HEPA” class. I don’t know the price but a WWW search engine may answer this.
You consider a Onefinity CNC as “portable”? Okay, I forgot that they also sell a model on wheels. I did not have that in mind.
But like all air suction devices, the more air flow rate and capability you have, the more the air flow remains at a high level and does not drop, even if you have foreign air drawn. On a CNC that mills wood, that is a frequent situation, as often it is difficult or even impossible to have the dust boot fit the workpiece perfectly. Often you can’t avoid that foreign air is drawn there. And a dust collection system will not have the air flow reduced then, so it may be that despite producing less pressure, it will draw the wood dust better as a shop vac.