Permanent magnet rotor and motor using the same

Details Permanent magnet rotor and motor using the same Permanent magnet rotor and motor using the same

H - Electricity

02

K

H02K 1/27 (2006.01)

Patent

CA 2716759

The invention discloses a permanent rotor and a motor using the same, comprising a stator and a rotor. The stator includes a stator core and a coil winding, multiple wire receiving grooves are disposed on the stator core, the rotor includes a rotor core and multiple permanent magnets, the permanent magnets are disposed on the rotor core, and a ratio between the number of teeth of the wire receiving grooves and that of the permanent magnets is 3: 2. It is characterized in that every two or three of the permanent magnets lean on each other and form a group of permanent magnets, a gap is disposed between adjacent groups of permanent magnets, the groups of permanent magnets are circumferentially distributed, magnetic polarities of the permanent magnet are alternatively distributed in a N phase and a S phase, and difference in an electric angle between centers of polarities of adjacent permanent magnets in one group is between 150 degrees and 170 degrees. The invention features simple structure, good manufacturability, and easy installation and production; and the motor generates a good waveform of sine wave counter-electromotive force embodies advantages of the sine wave drive, reduces vibration and noise, and improves motor efficiency.

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