| 摘要 |
<p>An air impeller, comprising a frame, a bladed wheel (4) provided with blades (42) for producing a substantially axial flow of a gaseous medium, an alternating-current motor (5) for rotating the bladed wheel, said alternating- current motor comprising a fixed stator (52-54) and a ro- tating rotor, and a frequency converter (6) or inverter for controlling the alternating-current motor, and in which the rotor of the alternating-current motor is integrated with the bladed wheel (4), being placed on its outer rim, and the stator is placed in the frame of the air impeller outside the rotor so that the stator produces rotation of both the rotor and the bladed wheel. The frequency converter (6) or inverter is integrated with the stator or a part of it to form a unitary , frequency-converter or inverter-controlled air im- peller structure.</p> |
