Quadrupole permanent-magnet brush coreless motor rotor structure

Abstract

The invention discloses a quadrupole permanent-magnet brush coreless motor rotor structure. The structure comprises a cylindrical coil, a disc, a commutator and a shaft; the shaft is fixedly connectedwith the center of the disc, one end of the cylindrical coil is fixed to the circumference of the disc, and the disc is made of an insulating material; and the commutator is coaxially arranged on theouter side of the disc, the cylindrical coil comprises three coil groups, and each coil group at least comprises two independent coils and is provided with a wire inlet head and a wire outlet head which can be connected with the commutator. According to the structure, a magnetic circuit is shortened, flux leakage is prevented, the equipment weight is decreased, the motor heat loss is reduced, theefficiency is improved, the brush number is decreased, the structure is simple, the winding wire head arrangement is regular, and the process is simple.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a rotor structure of a four-pole permanent magnet brushed hollow cup motor. Background technique [0002] Most of the current permanent magnet brushed coreless motors have a two-pole structure (that is, a pair of magnetic steel), and it is clear that the power density of a four-pole (that is, two pairs of magnetic steel) or more poles is higher than that of a two-pole motor; at the same time , affected by the structure of the brushed hollow cup motor, the magnetic circuit of the two-pole motor is long, resulting in a more prominent phenomenon of magnetic flux leakage outside the casing. The existing solution is to use a thicker casing to prevent magnetic flux leakage, so the weight of the motor increases. Lightweight is contradictory; under some specific requirements, the permanent magnet brushed hollow cup also adopts a four-pole structure, but in the form of four brushes, which ...

AI Technical Summary

Problems solved by technology

[0002] Most of the current permanent magnet brushed coreless motors have a two-pole structure (that is, a pair of magnetic steel), and it is clear that the power density of a four-pole (that is, two pairs of magnetic steel) or more poles is higher than that of a two-pole motor; at the same time , affected by the structure of the brushed hollow cup motor, the magnetic circuit of the two-pole motor is long, resulting in a more prominent phenomenon of magnetic flux leakage outside the casing. The existing solution is to use a thicker casing to prevent magnetic flux leakage, so the weight of the motor increases. Lightweight is contradictory; under som

Images