Novel generator made of iron-cobalt-based permanent magnet material

Abstract

The invention discloses a novel generator made of an iron-cobalt-based permanent magnet material. The novel generator may include a stator core, a rotor core and a rotating shaft. The stator core andthe rotor core are formed by laminating oriented silicon steel sheets. A three-phase symmetrical winding is wound on the stator core. A plurality of permanent magnets are arranged in the rotor core; the part, without the permanent magnet, of each rotor core silicon steel sheet is vacant or filled with a non-magnetic material; the rotor core is located in the stator core; an air gap with non-uniform thickness is reserved between the rotor core and the stator core. The salient pole difference of the synchronous motor is further improved, and the torque density of the motor is increased. The added permanent magnets adopt a magnetism gathering structure, so that the rotor core has a higher excitation source, and the excitation component of the stator winding is reduced. The power factor of themotor is effectively improved on the premise that the cost of the motor is basically unchanged.

Description

technical field [0001] The invention relates to the field of novel permanent magnet synchronous generators, in particular to a permanent magnet generator using iron-cobalt-based permanent magnet materials. Background technique [0002] At present, most permanent magnet motors on the Chinese market use NdFeB permanent magnet materials. Permanent magnet generators in the defense field generally use SmCo permanent magnet materials, but NdFeB has poor corrosion resistance and is the easiest to oxidize, and its demagnetization curve The lower part bends at high temperature, that is, the permanent magnet motor using NdFeB permanent magnet material is not suitable for working in the harsh environment of high temperature and high humidity. Although the performance of samarium cobalt permanent magnet material is excellent in all aspects, the price of samarium cobalt material is the highest. It is not suitable for promotion in the civilian market. The iron-cobalt-based permanent magn...

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Problems solved by technology

[0003] At the same time, since there is no excitation source on the rotor core in the prior art, the stator winding needs to generate a large component for excitation, so that the power factor of the motor is low

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