Stator-surface-mounted type doubly salient permanent magnet motor adopting modularized rotor

Abstract

The invention discloses a stator-surface-mounted type doubly-salient permanent magnet motor adopting a modularized rotor. The stator-surface-mounted type doubly salient permanent magnet motor comprises stators, the rotor, permanent magnets, a centralized armature winding and a magnetic-isolating material, wherein the stators and the rotor are in doubly-salient structures; the centralized armature winding and the permanent magnets are arranged on the stators; the stators with salient structures are divided into two groups and are respectively attached with stator teeth of the permanent magnets (namely permanent magnet teeth) and sheathed with stator teeth of coils of the armature winding (namely armature teeth), and the armature teeth and the permanent magnet teeth are distributed into a ring shape alternatively; all coils of the centralized armature winding are respectively sheathed on the armature teeth of the stators, and magnetic chains of all coil turn chains of the armature winding are in dipolar change; all the coils forming each phase of armature winding are connected in series or in series and in parallel, all radially-magnetized permanent magnets are respectively attached on the surfaces of the permanent magnet teeth of one stator facing to the rotor, and the magnetizing directions of the adjacent two permanent magnets are opposite; the rotor with a salient structure forms a ring shape by a plurality of U-shaped magnetic-permeating iron cores and a magnetic-isolating mechanism; and the adjacent U-shaped magnetic-permeating iron cores are separated and assembled by magnetic-permeating bridges.

Description

technical field [0001] The invention belongs to the technical field of motor manufacturing, in particular to an armature coil turn chain bipolar permanent magnet flux linkage, a stator surface-mounted double-salient pole permanent magnet with a high permanent magnet utilization rate and a modular rotor motor. Background technique [0002] With the intensification of the energy crisis, it has become the consensus of the world to use permanent magnet excitation instead of electric excitation to save energy consumption. At the same time, since my country is the country with the richest rare earth resources in the world, it is necessary to develop, research and promote the application of new structure rare earth permanent magnets. Motor has important theoretical significance and practical 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 develo...

AI Technical Summary

Problems solved by technology

[0005] 2. The embedded structure in which the permanent magnets are embedded in the rotor core will affect the mechanical strength of the rotor and require an auxiliary magnetic bridge, which will also increase the manufacturing process and cost;

[0006] 3. The permanent magnet is placed on the rotor, which is not conducive to the cooling of this type of motor. In order to dissipate heat, it is often necessary to design a special air circuit or other cooling methods;

[0007] 4. At present, the widely used magnets are neodymium iron boron with low Curie temperature. Due to the influence of temperature rise, there is a certain risk of demagnetization or even complete loss of magnetization in permanent magnet motors;

[0008] 5. If it is expected to use the stator armature winding to magnetize or demagnetize the magnetic steel, for the permanent magnet structure of the rotor, the magnetic potential of the stator armature winding needs to pass through the air gap reluctance, resulting in an increase in the cost of magnetization or even unfeasible

Its purpose is to obtain a bipolar permanent magnet flux linkage, but this structure directly leads to a short circuit between the two magnets and the stator teeth, resulting in serious magnetic flux leakage, which reduces the utilization rate of the unit magnet

However, the armature flux linkage of the traditional stator surface mount permanent magnet motor presents a unipolar change, and the utilization rate of the permanent magnet is low.

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