Whirlpool and Samsung are reducing the maximum spin speed on their washers

[spin-doctor]

Companies that want to use a “slower” motor the use a direct drive pancake motor that turns at the same rpm as the front load drum.

These use brushless DC motors that have no problem spinning at 17k+ rpm. They are permanent magnet synchronous motors with an inverter to up the frequency of synchronous speed.

What are the makes and models of the two examples you show in the pics of machines with 20K rpm motors? We can simply look up their manuals and specs and settle the debate easily with that.

 

[johnb300m]

What are the makes and models of the two examples you show in the pics of machines with 20K rpm motors? We can simply look up their manuals and specs and settle the debate easily with that.

I think you’re as equally capable as I am of doing that.

 

[spin-doctor]

Companies that want to use a “slower” motor the use a direct drive pancake motor that turns at the same rpm as the front load drum.

I’m quite shocked that members here are not familiar with the belt and pulley setup of a front load washer.

I’ll do the homework for y’all again.

If that that big drum pulley needs to spin at 1200 rpm, how fast do you think that teeny tiny motor pulley must turn?
Belt drive front loaders get their torque from high rpm multiplication. Direct drive motors have to use their brute force torque. Belt drive was around much longer before direct drive.
These use brushless DC motors that have no problem spinning at 17k+ rpm. They are permanent magnet synchronous motors with an inverter to up the frequency of synchronous speed.

Edit: and yes, at least 1 special someone on here denies motors can reach these high speeds.

Ok, I went back and read the older posts in this thread (just joining this discussion yesterday). Which I should have done prior to posting earlier. I see you and the other guy did post pics of washer motors with high rpms up to 17.5K. Not 20K, but certainly very fast nonetheless.

Very interesting, thanks for clarifying that. I guess my mind is stuck with the older tech of non-variable, fixed speed AC motors. The modern motors and their controllers make it possible to get the whole job done with no transmission other than a belt drive. Amazing, thanks for the education.

 

[Chetlaham]

US front loaders HAVE heaters lol.

Many don't, and those that do don't run in it in the majority of their offered cycles.

So again, there is no heating.