| 摘要 |
A compact-sized, high-efficient, and high-speed electric blower has high centrifugal resistance. The electric blower includes a rotor (8) having a multi-slot rotor winding (5) along which an excitation electric current is supplied through a slip ring (32) by a power supply brush (33,34), a stator (2) having a detecting means for detecting position of a magnetic pole of the rotor, and a stator winding (4) in a pole-focused winding pattern, a casing (6) housing the stator (2) and forming a main path of wind, and a centrifugal fan (7) attached to a rotational axis of the rotor (3), wherein, in response to the rotor pole position detection signal, a semiconductor switch regulates and therefore controls electric current on the rotor winding or the stator winding. Semiconductor switches control electric current on the rotor winding (5) or stator winding (4) in accordance with the detection signal regarding the position of rotor magnetic pole. |
