BRUSHLESS DIRECT CURRENT ENGINE Russian patent published in 2012 - IPC H02K29/08 H02K29/03 

FIELD: electrical engineering; machinery; thermal control.

SUBSTANCE: brushless direct current engine has a cylindrical case with a flange, a stator and a rotor positioned within the case, and a cylindrical connector block positioned on the opposite side of the case from the flange. The engine contains a thin-walled heat-transfer frame positioned between the flange and the connector block. This frame is made in the form of a rotation body, its central part and parts adjoining the faces are made in the form of cylinders. Furthermore, the adjoining parts are connected with the central part via inclined portions which evenly increase in the diameter from face adjoining point to the central part. The frame has a meridional cut throughout its length, and the portion between the frame's faces has meridional slots crossing its central part and inclined portions.

EFFECT: improved heat removal from the engine by transferring the heat from the case of the brushless direct current engine to the sealed shell.

2 dwg