Cylindrical rotor for permanent magnet-excited electric machine, has permanent magnet comprising partial magnets and arranged between pole shoes, where one of partial magnets has higher coercive force than another partial magnet

摘要

The rotor has a permanent magnet comprising two partial magnets (71, 72) and arranged between two pole shoes (42) such that a magnetization direction of the permanent magnet is aligned in a tangential direction. One of the partial magnets has a higher coercive force than another partial magnet. The partial magnets are designed as sintered ferrite magnets with a block or cuboid-shape. A pocket for accommodating the permanent magnet is arranged between the pole shoes and extended in a radial direction from outer circumference of the rotor to an inference area of the rotor. An independent claim is also included for an electrical machine.