Electronically commutated motor for dust exhausters, vacuum cleaners and similar devices

An electronically commutated motor, comprising:

• a housing;
• a shaft;
• a main bearing supporting said shaft;
• a bearing plate for removing heat from said main bearing and for dividing said housing into a rotor chamber and a turbine chamber;
• rotor means mounted on said shaft in said rotor chamber;
• stator means mounted in said rotor chamber surrounding said rotor means for causing rotation of said shaft and rotor means;
• fan rotor means mounted on said shaft in said rotor chamber for drawing gas through a rotor chamber intake aperture past said bearing plate for heat transfer therefrom and for exhausting said gas through one or more rotor chamber exhaust apertures;
• turbine means mounted on said shaft in said turbine chamber for drawing gas through a turbine chamber intake aperture past said bearing plate for heat transfer therefrom and for exhausting said gas through one or more turbine chamber exhaust apertures;
• wherein said bearing plate is formed in one piece, separating said fan means from said turbine means, and has indentations and cutouts in a radially outward direction, into which gases from said fan means and said turbine means engage from their respective sides, thus cooling said bearing plate from both sides;
• and
• wherein both said rotor chamber and turbine chamber exhaust apertures are positioned close to one another in connection with said bearing plate, thus allowing said bearing plate to be advantageously cooled.