Yes, STATORS is a Scrabble word!

Letter values in Scrabble US: S 1, T 1, A 1, T 1, O 1, R 1, S 1.

Is it a valid word?

STATORS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

mechanical device consisting of the stationary part of a motor or generator in or around which the rotor revolves

Also: stator coil.