Disc type motor rotor

Abstract

The invention relates to components of a motor, in particular to a disc type motor rotor used in a permanent magnetic disc type motor with axial magnetic flux. The disc type motor rotor comprises a disc-shaped rotor tray and a plurality of magnetic steel arranged on the rotor tray. An outer circle of at least one end face of the rotor tray is provided with an annular outer protruding rib, an inner circle of the end face is provided with an annular inner protruding rib, and the inner protruding rib and the outer protruding rib form an annular dovetail groove. The magnetic steel is sector-shaped, a radial section of the magnetic steel is in a dovetail shape matched with the dovetail groove, and the magnetic steel is distributed in the dovetail groove in annular mode. A plurality of installing notches for the magnetic steel to enter the dovetail groove are arranged on the inner protruding rib and sealed through pressing blocks arranged inside the installing notches. The disc type motor rotor can keep completeness of magnetic performance and good mechanical performance of the magnetic steel. The rotor can form a required magnetic circuit structure, reduces magnetic loss of the magnetic steel and yoke of the rotor, improves efficiency of the motor, and prolongs service life of the motor.

Description

technical field [0001] The invention relates to parts of electric motors, in particular to a disk motor rotor used in permanent disk motors with axial magnetic flux. Background technique [0002] The rotor of the permanent disk motor is mostly composed of permanent magnets and rotor yokes. The magnets are mounted on the yokes by bonding or screw fastening. The permanent magnets form a magnetic circuit through the yokes to form the permanent magnets of the motor. rotor. During the working process of the motor, the permanent magnets of the rotor and the yoke iron will produce magnetic loss, and the rotor will generate heat. The method of bonding may cause the magnets to fall off after the rotor is heated or used for a long time; and the method of fastening with screws also has The main defect is that it is necessary to open threaded holes on the magnet, which affects the magnetic properties of the permanent magnet, and because the permanent magnet material is generally relati...

AI Technical Summary

Problems solved by technology

During the working process of the motor, the permanent magnets of the rotor and the yoke iron will produce magnetic loss, and the rotor will generate heat. The method of bonding may cause the magnets to fall off after the rotor is heated or used for a long time; and the method of fastening with screws also has The main defect is that it is necessary to open threaded holes on the magnet, which affects the magnetic properties of the permanent magnet, and because the permanent magnet material is generally relatively brittle, this installation method is likely to cause brittle cracking of the magnet for relatively thin magnets , affecting the structural strength of the rotor

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