Shafting-free outer rotor permanent-magnet synchronous motor with stator water-cooling structure

Abstract

The invention discloses a shafting-free outer rotor permanent-magnet synchronous motor with a stator water-cooling structure, belongs to the field of motors and aims to solve the problems that structures of most of technical schemes for cooling motors are complicated, manufacturing costs of the motors are increased, and a motor stator can not be effectively cooled. The shafting-free outer rotor permanent-magnet synchronous motor comprises a rotor and a stator, the rotor is arranged outside the stator, an air gap is reserved between the rotor and the stator, the rotor comprises rotor magnetic steel and a plurality of permanent magnets, the plurality of permanent magnets are uniformly distributed along the inner circumference surface of the rotor magnetic steel, the stator comprises a stator core and stator windings, a plurality of stator slots are uniformly arranged in the stator core along the peripheral direction, the stator windings are embedded into the stator slots, the stator further comprises a stator casing, the stator casing is arranged on the inner circle surface of the stator core, an S-shaped cold water diversion trench, a water inlet pipeline and a water outlet pipeline are mounted in the stator casing, and the water inlet pipeline and the water outlet pipeline extend out of an end face of the stator casing and are communicated with the cold water diversion trench.

Description

technical field [0001] The invention relates to a shaftless external rotor permanent magnet synchronous motor with a stator water cooling structure, which belongs to the field of motors. Background technique [0002] The permanent magnet synchronous motor will generate heat during operation. The reasons for the normal heating are probably as follows: [0003] 1. The coil has resistance, and the power loss when the current flows; [0004] 2. The magnetic field of the iron core has a "hysteresis loop", and a part of the magnetic energy converted from electric energy continues to be converted into heat energy; [0005] 3. There are eddy currents in the iron core, and a part of the magnetic energy transformed by electric energy becomes electric current and then heat energy; [0006] 4. There is friction between the mechanical rotating parts, and part of the kinetic energy converted from electric energy continues to be converted into heat energy. [0007] If the motor is overh...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that there are many existing technical solutions for cooling the motor, but most of them are complicated in structure, which not only increases the manufacturing cost of the motor, but also cannot effectively solve the cooling problem of the motor stator, and provides a motor with a stator water cooling structure. Shaftless Outer Rotor Permanent Magnet Synchronous Motor

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