Motor rotor structure and permanent magnet motor
AssigneeGree Electric Appliances, Inc. of Zhuhai
InventorsMin Wang, Yong Xiao, Quanfeng Li
Life of this patent
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Abstract
Disclosed is a motor rotor structure including a rotor core. A plurality of radial slots each are in the rotor core along a circumferential direction, and a first flux barrier slot is provided between every two adjacent radial slots. Two kinds of permanent magnets having different coercivities mounted in each radial slot. The two kinds of permanent magnets having different coercivities are distributed along a radial direction of the rotor core. The two kinds of permanent magnets having different coercivities are both magnetized along a tangential direction of the rotor core. A second flux barrier slot is provided between the two kinds of permanent magnets having different coercivities.
Claims20
A permanent magnet motor rotor structure, comprising a rotor core, wherein:
- a plurality of radial slots are provided in the rotor core along a circumferential direction, and a first flux barrier slot is provided between every two adjacent radial slots;
- two kinds of permanent magnets having different coercivities are mounted in each radial slot of the plurality of radial slots;
- the two kinds of permanent magnets having different coercivities are distributed along a radial direction of the rotor core;
- the two kinds of permanent magnets having different coercivities are both magnetized along a tangential direction of the rotor core;
- a second flux barrier slot is provided between the two kinds of permanent magnets having different coercivities, the second flux barrier slot is configured to separate the two kinds of permanent magnets having different coercivities and separate the magnetic fields generated by the two kinds of permanent magnets;
- and
- when magnetization directions of the two kinds of permanent magnets having different coercivities are opposite, the rotor core is in a more-magnetic-pole state, and when the magnetization directions of the two kinds of permanent magnets having different coercivities are identical, the rotor core is in a fewer-magnetic-pole state.
A permanent magnet motor, comprising a stator core and a motor rotor structure, wherein:
- the motor rotor structure further comprises a rotor core;
- a plurality of radial slots are provided in the rotor core along a circumferential direction, and a first flux barrier slot is provided between every two adjacent radial slots;
- two kinds of permanent magnets having different coercivities are mounted in each radial slot of the plurality of radial slots;
- the two kinds of permanent magnets having different coercivities are distributed along a radial direction of the rotor core;
- the two kinds of permanent magnets having different coercivities are both magnetized along a tangential direction of the rotor core;
- a second flux barrier slot is provided between the two kinds of permanent magnets having different coercivities, the second flux barrier slot is configured to separate the two kinds of permanent magnets having different coercivities and separate the magnetic fields generated by the two kinds of permanent magnet;
- and
- when magnetization directions of the two kinds of permanent magnets having different coercivities are opposite, the rotor core is in a more-magnetic-pole state, and when the magnetization directions of the two kinds of permanent magnets having different coercivities are identical, the rotor core is in a fewer-magnetic-pole state.
Dependencies are inferred from the claim text.