| 摘要 |
A rotor for a rotary electrical machine is in the form of a single cylindrical two-pole permanent magnet (40) mounted between two end pieces (42, 44) and surrounded by a retaining hoop (70). The magnet, which is made of high energy product matereial, is "straight through" diametrically magnetised to provide a sinusoidal air gap flux distribution which eliminates losses due to harmonics. The cylindrical two-pole permanent magnet is built up from a plurality of smaller magnet blocks (50) which are stacked and machined to form a cylindrical configuration. |
