Tangential-set magnet permanent synchronization motor

Abstract

The invention provides a tangential steel magnet permanent magnetism synchro motor, which belongs to the permanent-magnet motors. The motor comprises a stator consisting of a stator core (1) and an armature winding (2), and a rotor consisting of a tangential magnetization permanent magnet (3), a North Pole magnetizer of the rotor (4), an S-pole magnetizer (5) of the rotor, a fixed cover (7) arranged on a driving end, a fixed cover (8) arranged on a non-driving end (8), an axis of rotation (6) and a bearing (9). The rotor and the stator are arranged in a front end cover (10), a back end cover (11) and an enclosure (12). The axial length of the tangential magnetization permanent magnet (3), the North Pole magnetizer of the rotor (4) and the S-pole magnetizer (5) of the rotor (5) is larger than the axial length of the stator core (1); the end connection length can be used effectively. Due to the axial magnetic concentration action of the rotor core, the air-gap induction of the motor is increased; and the power density of the permanent-magnet motor is further increased. The utility model is highly valuable in application in aerospace and civil occasions requiring high performance.

Description

technical field [0001] The invention relates to a tangential magnet steel permanent magnet synchronous motor, which belongs to the technical field of permanent magnet synchronous motors. Background technique [0002] Synchronous motors mainly have the following types: [0003] 1. Electric excitation synchronous motor, this kind of synchronous motor is mostly equipped with brushes and slip ring devices, which has poor reliability, short life, high manufacturing process requirements, high cost and difficult maintenance; [0004] 2. Rotary rectifier type brushless synchronous generator, although this kind of generator has good reliability and high power-to-weight ratio, but the rotor structure is complicated, and there are diodes on the rotor, the rotor failure becomes the main failure of this kind of motor; [0005] 3. Brushless claw pole generators and Renter generators, the common disadvantages of these two motors are that there is an additional air gap and a long effective...

AI Technical Summary

Problems solved by technology

[0003] 1. Electric excitation synchronous motor, this kind of synchronous motor is mostly equipped with brushes and slip ring devices, which has poor reliability, short life, high manufacturing process requirements, high cost and difficult maintenance;

[0004] 2. Rotary rectifier type brushless synchronous generator, although this kind of generator has good reliability and high power-to-weight ratio, but the rotor structure is complicated, and there are diodes on the rotor, the rotor failure becomes the main failure of this kind of motor;

[0005] 3. Brushless claw pole generators and Renter generators, the common disadvantages of these two motors are that there is an additional air gap and a long effective magnetic path, so the power density of the motor is low and the performance is poor;

[0006] 4. Inductor generator, its main disadvantage is that there is no alternating air gap flux, and the magnetic utilization rate is low, so the power to weight ratio is low;

[0007] 5. Permanent magnet synchronous motor. This kind of synchronous motor can realize brushless structure by placing permanent magnets on the rotor. It has a series of unique advantages, such as high efficiency and simple structure. Its main disadvantage is that it outputs Difficulty in voltage regulation and inability to demagnetize when an internal short circuit fault occurs, and it is difficult to weaken the field in electric operation;

However, the main disadvantage of the tangential magnetization permanent magnet synchronous motor is that the processing technology is relatively complicated and the magnetic flux leakage coefficient is relatively large.

Images