Coil mutual-supplementary magnetic pass switching biconvex permanent magnetic motor

Abstract

The invention discloses a motor with stronger torque output ability and higher power density, which consists of stator (1) and rotor (4), wherein the rotor (4) lies in the interior or exterior of the stator (1); the stator (1) and rotor (4) are double-salient pole structures with the gathered winding (3) and permanent magnet (2) on the stator (1); the radial of second and fourth winding coils are faced with each gathered winding coil in the U-shaped magnetic iron groove of two adjacent stators (1); four winding coils connect front head to end sequently; the permanent magnet (2) is set between two adjacent U-shaped magnetic iron core.

Description

technical field [0001] The invention is a motor with simple and strong structure, strong torque output capability and high power density, and relates to the technical field of motor manufacturing. Background technique [0002] As the country with the largest reserves of rare earth materials in the world, our country vigorously researches and promotes the application of various new permanent magnet motors represented by rare earth permanent magnet motors, which has important theoretical significance and application value. Regardless of power generation or electric operation, new permanent magnet motors with high efficiency, high torque (power) density and low loss are showing a trend of accelerated development. Over the past decade or so, research hotspots have been focused on rotor permanent magnet motors represented by surface-mounted, plug-in and built-in types. However, placing permanent magnets on the rotor will cause a series of problems during the design and operation...

AI Technical Summary

Problems solved by technology

However, placing permanent magnets on the rotor will cause a series of problems during the design and operation process, which are mainly reflected in the following three points: 1. For the structure of permanent magnets pasted on the surface of the rotor or inserted between the salient poles of the rotor, in order to To overcome the influence of centrifugal force generated by high-speed operation, it is usually necessary to make an auxiliary permanent magnet fixing device, and the permanent magnet is located between the stator and the rotor, which increases the length of the air gap, which not only increases the volume of the motor, but also leads to a weakening of the air gap magnetic density , affecting the output; 2. The embedded structure of the permanent magnet embedded in the rotor core will affect the mechanical strength of the rotor, and an auxiliary magnetic bridge is required, which will also increase the manufacturing process; 3. The permanent magnet placed in the rotor is not conducive to this type motor cooling

[0003] For the rotor permanent magnet motor, since the armature reaction flux generated by the stator winding will enter the rotor and couple with the permanent magnet, there is a certain degree of demagnetization risk; on the other hand, whether it is used as a generator or a motor, In order to obtain a no-load back electromotive force with a high sinusoidal degree, distributed windings are usually installed on the stator, which will directly result in longer winding ends, increased wire length and resistance, greater copper loss, reduced motor efficiency, and even worse. The increase in volume limits the application of rotor permanent magnet structures in aerospace, aviation, navigation, electric vehicles and other fields that have strict requirements on motor volume

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