This is a link to Lokshop's scan of Marklin 2006 Catalog:
http://catalog.lokshop.d.../2006/E/H0/image_12.html

Roughly, the size of the motor is about similar to the Maxon DC motor in the BR45 discussed here.

Note that this is the current, most recent version of the motor. Earlier, Marklin use a larger motor that forum members refer to as "Large Sinus".

As for drive characteristics, this matches or better the Maxon DC motor. Power delivery is very, very smooth with no cogging effect noticable; it is also very quiet - quieter than BR45 in the first few speed steps, but hardly noticable. Torque is also noticably greater across much of the range compared to Maxon DC.

The drawback of this motor is that spare part cost is very, very expensive, in particular the driver board. But theoretically this should last a long time...

Excuse me if I'm sometimes repeating myself and talking drivel...
As for me, I have decided to give priority to Marklin models equipped with EC brushless motors , into Marklin range they are named "SDS - motors".
I've never understood Marklin why they have decided to communicate with the name "SDS or C-Sinus" instead of " Brushless motors" or " EC brushless motors". In my opinion it's a communication mistake, specially for MRR enthusiasts, more specially for 2 railers: as Marklin was the first & unique manufacturer to install those "SDS brushless motors", 2 railers were always suspecting them not to be compatible with 2 rails digital systems. They are completely wrong, but you know MRR enthusiasts tend to be slightly anxious by nature.
The expression " EC brushless motors" is wellknown, and you can find plenty of information about it. So they could learn all the advantages of these motors.They could also learn that if other train manufacturers don't use it, the main reason is because those motors are more expensive.
( which is funny is that many 2 railers are still analog. By comparison with classical brushed motors, some of the advantages of brushless motors are more obvious & visible under analog control than with digital control)

Now, remains the question about durability and life of electronics....I'm not worry about the hardware of decoders. I'm more worry about the stability of the firmware, 15 years, 20 years, 30 years, 40 years,...100 years ? I'm also wondering if this firmware can be updated ( I think: yes, but...). If yes, we could do it by ourself, the loco stay on programming track...
Or may be we have to change them after xx years...
I have seen some 20 years old decoders, still working perfectly, as new...
But current modern decoders have more functionnalities. They also are much smoother. May be it's not a problem if we have to change the decoder from time to time (every 20/30/40 years)...
Anyway, whatever the types of motor, either EC brushless motors or ordinary brushed motors, the question about durability of electronics remains the same: most of us decided to go digital with decoders.
So,about the future the question is :
-what do you prefer: probability of changing electronics only, or probability of changing both electronics + motor ?
There is another reason: running brushed motors under E.C. of a digital decoder technically is a kind of non sense. That's why we hear some crackling at low speed sometimes ( commutation-vibration)
Definitely, each time I can do it, I’ll give priority to models with “EC brushless SDS motors.

It’s just a pity that 2010 Insider model of BR 03.10 is not fitted with EC brushless motor. IMHO It’s purely & only the decision of some Marklin accountant . (I hate accountants... even if we need them so much... )

Edited by user 27 February 2010 14:07:58(UTC)  | Reason: Not specified

Jon,

You excuse me, its my age

John

Hi All,

Just as a follow up to all of this.

Dave kindly sent me his motor and I have been able to take a look at it.

The motor seemed in good condition, and spins freely, which is generally a sign that it hasn't been overheated. But when a voltage is applied it runs as if it has several cylinders 'missing', needs a flick to start up, as Dave reported.

So I took it apart, and the reason for the problem is immediately apparent. The cause of the problem is that one brush has fallen apart, and I suspect we have an unfortunate combination of normal wear, which has weakened the brush, followed by the electronics failure which caused the brush to 'fuse' at its weakest point. The ends of the brush have dropped into the motor.

So unfortunately the motor is beyond repair, the only fix is a new motor. Dave has details on this.

If anyone can tell me how to add photographs to this forum then I am happy to post them. Daves armature is now my avatar...!

Obviously what I don't know is how much the motor has been run, and under what kind of use, temperature, load etc etc, which will drastically effect the life of the product.

Best regards
Jon Pippard
maxon motor AU

Jon also provided some information sheets that I will upload in a few minutes.

Nev
Note from Jon:

Hi Dave,

Here is some stuff you (and other modellers) might find interesting.

The technology equivalent of the Sinus motor is our ECi 40 series, see the left hand drawing top of 29pdf.

The internal magnet with 7 pole pairs rotates in the middle, the windings are on a conventional laminated stack with salient (protruding) poles around the outside.

The ECi motor is a bit large for most models at 40mm diameter, although I guess O gauge might be OK!

The motor to the right is an EC pancake, note the magnets are in a ring around the inside of the rotor, which is coupled to the output shaft. This is an 'outrunner' in modellers terms.

Both these motors exhibit cogging and produce good torque at moderate speeds.

The EC motor is shown on 26 and 27 pdf. This has a knitted winding and a completely round magnetic return (which is also laminated but has no 'salient' ie protruding poles) so no cogging, but tends to have less torque and higher speed...up to 70,000rpm in special applications.

The brushed motor is shown on 24 and 25pdf, this is as per the motor you have have in your BR loco. Note how the winding is constructed, self supporting! The magnet assembly is attached to an end cap, so held still, and the shaft with the rotating winding attached passes through the middle. There are two styles of brushgear, graphite, which is robust, but inefficient electrically and mechanically, and precious metal, which is more delicate, but works better.

Hope you are now an expert! Have a good weekend.



Kind regards

Jon Pippard
Sales and Applications Engineer

Maxxon1
Maxxon2
Maxxon3
Maxxon4
Maxxon5

Maxxon6

As a follow up to all this, we should have a small number of these motors in stock in Sydney as of around mid April. Please call our Sydney office if you need a quote on one of these. The number is (02) 9476 4777.

Thanks

Jon Pippard

That is great Service far beyond what is normally expected.
Thanks from all.

NN

I have told you before Juhan,
All of the good guys are in the best part of the world. Thats us . The bit below the equator.

NN