Coreless Motors (Kato 11-109) and PWM?

Model Railroader Electronics and DCC
1

I’m looking at building a HOn30 micro-layout, using locomotves running on the Kato 11-109 chassis and pulse width modulation DC power. This chassis has a coreless motor, and I’ve found conflicting advice regarding using coreless motors with PWM.

Will PWM power damage these motors?

2

I am working on the same with those same chasis. Havent come accross PWm thing. then again, I am following the advice from places like 009 society. That would be the place to ask actually.