Asea Brown Boveri Inc.

Sandor Pongracz

Hans Zimmermann

In gas-cooled electric machines having a stator (3) and a rotor (6) on which an axial ventilator (9) is arranged, the cooling gas flows unevenly into the end-winding cavity (13) seen in the circumferential direction. By providing upstream of the axial ventilator (9), when seen in the direction of flow of the cooling gas, and coaxially with said ventilator an annular air guide member (1) having baffles (17), and reducing the flow cross section for the cooling gas flowing through the air guide member (1) in the main direction of the approach flow on a part of the outer circumference of the air guide member (1) by means of a covering (23), the cooling effects becomes more even and the axial ventilator (9) is better utilized.

Growing community of inventors

Kloten, Switzerland

Sandor Pongracz