Are All Scale Speed Motors Interchangeable?

[jagged ben]

Like I stated no one that I know calls the armature a rotor for this type of DC motor. When one orders parts its a armature. AC motors, and alternators have a rotors.

  https://en.wikipedia.org/wiki/DC_motor

Both that link and this one support that the armature can be the rotor or the stator.

[nickelplate759]

A rotor is essentially everything that comprises the moving parts of the motor, which may or may not include the armature, so the terms are not synonyms. All motors contain a rotor, regardless of whether the armature is stationary or moving.

https://en.wikipedia.org/wiki/Rotor_(electric)

Almost, but not quite.  Consider the linear induction motor.  https://en.wikipedia.org/wiki/Linear_induction_motor

[rrjim1]

Both that link and this one support that the armature can be the rotor or the stator.

Maybe you should read it again, a brushed motor is what we have here and what we have been talking about.

[DKS]

Almost, but not quite.  Consider the linear induction motor.  https://en.wikipedia.org/wiki/Linear_induction_motor

OK, so I'll be more explicit: Motors with a rotating shaft have rotors. Or, non-linear motors have rotors. Yikes.

Both that link and this one support that the armature can be the rotor or the stator.

Semantics. The armature on the motors we have been discussing is part of the rotor. Thus they might be confused by some as being one and the same, when they are not.

The page https://en.wikipedia.org/wiki/DC_motor correctly refers to the rotating part of the motor as the rotor. The rotor may or may not include the armature.

 

[rrjim1]

Semantics. The armature on the motors we have been discussing is part of the rotor. Thus it might be confused by some as being one and the same, when they are not.

The page https://en.wikipedia.org/wiki/DC_motor correctly refers to the rotating part of a motor (AC or DC) as the rotor. The rotor may or may not include the armature.

From that link, and the type of motor we are talking about.!   "A simple DC motor has a stationary set of magnets in the stator and an armature with one or more windings of insulated wire wrapped around a soft iron core that concentrates the magnetic field. The windings usually have multiple turns around the core, and in large motors there can be several parallel current paths. The ends of the wire winding are connected to a commutator. The commutator allows each armature coil to be energized in turn and connects the rotating coils with the external power supply through brushes."
 
Watch this video and she will show you armatures.

https://www.bing.com/videos/search?q=rewind+armature&view=detail&mid=DBB6B4CC1C0F4B257D70DBB6B4CC1C0F4B257D70&FORM=VIRE

The rotor may or may not include the armature.  This is incorrect because it's the wires, core, commutator, and shaft that makes up the armature. Without the wires and commutator you have a rotor. 

[DKS]

From that link, and the type of motor we are talking about.!   "A simple DC motor has a stationary set of magnets in the stator and an armature with one or more windings of insulated wire wrapped around a soft iron core that concentrates the magnetic field. The windings usually have multiple turns around the core, and in large motors there can be several parallel current paths. The ends of the wire winding are connected to a commutator. The commutator allows each armature coil to be energized in turn and connects the rotating coils with the external power supply through brushes."

And on the same page,

Miniature motors resemble the structure in the illustration, except that they have at least three rotor poles (to ensure starting, regardless of rotor position) and their outer housing is a steel tube that magnetically links the exteriors of the curved field magnets.

The rotor may or may not include the armature.  This is incorrect because it's the wires, core, commutator, and shaft that makes up the armature. Without the wires and commutator you have a rotor.

Wait, your own illustration defines the armature as the part in the red box, which does not include the commutator and shaft. So, make up your mind.



Honestly, this whole subject has well entered the "dead horse" zone, so I'm stopping here. Call the parts whatever you want. As long as the motors run, who cares.

 

[rrjim1]

And on the same page,

Wait, your own illustration defines the armature as the part in the red box, which does not include the commutator and shaft. So, make up your mind.



Honestly, this whole subject has well entered the "dead horse" zone, so I'm stopping here. Call the parts whatever you want. As long as the motors run, who cares.

Best joke I have heard all day!    Thanks for the laugh!   

[peteski]

 
Sorry - I feel responsible for this excursion into electric motor nomenclature. At least ffjim1 is laughing.

But we still do not have a handy photo with all the various types of motor Atlas used, and their descriptions).

[davefoxx]

But we still do not have a handy photo with all the various types of motor Atlas used, and their descriptions).

Do we need it?  Heck, Atlas went to the scale speed motor probably fifteen years ago.  Let's move on. 

DFF

[peteski]

Do we need it?  Heck, Atlas went to the scale speed motor probably fifteen years ago.  Let's move on. 

DFF

But I think it  would be very handy for reference. I would do it, but I don't think I have all the flavors of motors.  Plus, we have 2 types or the slower motors (scale and slow speed, and supposedly there might even be sub variants with different poles skew angle).

[CRL]

Maybe the Atlas marketing department changed over to Scale Speed Motors, but the engineering department didn’t.

[rrjim1]

Maybe the Atlas marketing department changed over to Scale Speed Motors, but the engineering department didn’t.

So what does the Atlas engineering department call the three different motors used in there n-scale locos? They sure can't use the same name for all three or one could never tell the difference between them!   

[CRL]

So what does the Atlas engineering department call the three different motors used in there n-scale locos? They sure can't use the same name for all three or one could never tell the difference between them!   

Exactly.

[Carolina Northern]

Exactly.

Huey, Duey, and Clyde.

[narrowminded]

They all have different part numbers in the parts drawing even though many are likely to fit many different models.  That would satisfy the differences from different suppliers including the obviously different skew angles.  What IS important is those variations still have acceptably similar speeds so, for my way of thinking, it isn't the problem it's being made to be.  And for those who want the different pole skewing, you're aware and can assemble and disassemble as you will.  The assemblies will interchange. 

I have learned a lot doing this project and am satisfied that I have all of the information I need to approach another project another day.   And I have the spare motors in stock now, too!