Thread Number: 30288
Carbon brushes, Direct drive or Inverter motors?
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Post# 459295   8/26/2010 at 02:28 (4,964 days old) by virabhadrasana (France / Italy)        

Hello
I would like to know if Direct Drive and Inverter motors are really more efficient and less fragile than carbon brushes motors, or are they just quieter?
Are DD and Inverter more expensive to be repaired?
Should I get a new washer (I've got a Siemens Siwamat XLS 1260 bought in 2001), I think it could be a LG or a Panasonic with 60L drum capacity or maybe a Bosch/Siemens with Inverter.





Post# 459358 , Reply# 1   8/26/2010 at 13:48 (4,963 days old) by nickuk (chelmsford UK)        

Hello

As far as I know, there are two types of brush motor.

One is the standard AC brush motor, found on most machines including BSH.

Another is the DC brush motor. This is found on most Miele machines except ones which have an inverter. The difference is that DC brush motors are practically silent while in wash mode (in some cases quieter than inverter) whereas an AC brush motor will grizzle to a greater (old Hotpoint) or lesser (Bosch etc) extent. However, a DC brush motor will still make the familiar whining sound as it ramps up and spins.

A promise of silence from a machine with an inverter motor is not always true. The LG that I had with an inverter motor made horrible metallic noises (quite normal,the one at work also did), and certainly whirred on spin. It also had a hissy noisy fill valve and a noisy pump which to myself and my wife (in a more or less open plan living area) was more irritating than the current Bosch which just does everything quite quietly despite the brush motor.

Personally, I prefer a brush motor because they are infinitely speed variable. I have never known an induction machine do graduated tumbles, delicate cycles or distributes as effectively as a brush motor machine, but I admit this is just my experience and this viewpoint may be outdated. I also prefer the noises of a brush motor, and yes - I do think that they tend to be easier / cheaper to work on and repair than induction ones. Usually an induction motor failure requires a replacement motor.

If I were in your position I would be going for a BOL Miele, regardless of motor, though if you are dead set on an induction machine and a large capacity, your choices would seem appropriate. From what I read on here LG have improved considerably and I wouldn't want just my experience to put you off. I really like my Bosch machine but they don't seem to popular on here, different people have differing requirements.


Post# 459371 , Reply# 2   8/26/2010 at 14:51 (4,963 days old) by electron1100 (England)        
Hype

electron1100's profile picture
Dont get taken in by marketing hype, direct drive motors can have there own set of problems, the worst being if and when the bearing seal goes (and they do)when the bearings collapses it takes the motor with it making the machine uneconomical to repair.

Brush motors may seem crude but they are reliable and will do anything you want from them.

Remember manufacturers are out to sell their products and will use what ever hype they can to make their product seem better than anyone elses, dont be taken in by flashing displays and gizmos, machines with programmes that you will rarely need

Stick to well known qaulity manufactures, Miele being the main one as the previous poster said better to buy a bottom end Miele than a top range flash glitter box from one of the incoming new manufacturers.

And also the previous poster made a comment that bugs me to, what is the point of a quiet wash motor when most manufacturers use cheap noisy pumps, and poorly built and/or designed soap draws that are noisey

I now have a Hotpoint Aqualtis, quiet wash action (linear motor), gets noisier on a spin though, BUT when the pump kicks in!!!!! give me strength, how Hotpoint or anyone else has the gall to put such terms as "SHH wisper quiet" on the front of the machine winds me up no end, they should all be done under the trades description act, because modern machines that use these pumps are not whisper quiet...........rant rant rant :-)

My previous machine was a Bosch reasonable noise from the brushed motor, but again the PUMP..........ah well

Good luck in seeking out a sensible well built machine

Gary


Post# 459391 , Reply# 3   8/26/2010 at 19:04 (4,963 days old) by deedub (Melbourne, Australia)        
Miele

base model Miele with the DC motor is quieter than an Asko induction. Awesome demo in the shop if you want to sell the Miele! TOL Miele with induction are super quiet. So good I bought one.


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