Axial dual-magnetic circuit permanent-magnet direct current motor with single group of magnetic sheets

Abstract

The invention belongs to the technical field of permanent-magnet brushless halless dual-magnetic circuit motors, and particularly relates to an axial dual-magnetic circuit permanent-magnet direct current motor with single group of magnetic sheets. The axial dual-magnetic circuit permanent-magnet direct current motor comprises a stator, iron cores, winding armatures, a rotor, magnetic sheets, a housing and end covers, wherein the rotor is driven through a shaft; two groups of winding armatures are respectively fixed on the end covers at two sides and are arranged around the iron cores; the housing, the iron cores and the winding armatures form the stator; windings which are easy to heat are fixed on the housing of the motor to form the stator; the magnetic sheets coat the rotor in the middle of the motor to form a magnet yoke; the rotor is inserted into the stator; and the magnetic sheets are parallel to the iron cores. The axial dual-magnetic circuit permanent-magnet direct current motor has the beneficial effects that the defect of low efficiency caused by loosening of a conventional direct current motor is overcome; the slot space-factor can be up to 98%; the efficiency is greater than 90%; and the axial dual-magnetic circuit permanent-magnet direct current motor is few in material, compact in structure, low in price, good in cooling effect, stable and reliable in performance and long in service life.

Description

technical field [0001] The invention belongs to the technical field of a permanent magnet, brushless and hallless double magnetic circuit motor, in particular to an axial double magnetic circuit permanent magnet DC motor with a single set of magnetic sheets. Background technique [0002] Conventional DC permanent magnet motor as attached figure 1 As shown, they are all radial magnetic circuits, and there is only one set of windings 2. The magnetic circuit starts from the N-pole magnetic piece 1 on the stator 3 and enters the adjacent S-pole magnetic piece 1 to form a radial magnetic circuit. The motor of this type The winding 2 is made of copper wire with a circular cross section, so the full slot rate of the winding 2 is only about 75%, which makes the motor large in size, heavy in weight, thick in the motor shaft 5, and the highest efficiency is only 80~84%, and the intermediate rotor It is also difficult to radiate heat when the coil on the 4 is working. [0003] There ...

AI Technical Summary

Problems solved by technology

The disadvantage of the above two types of motors is that they also have two sets of magnets, and the winding is difficult to dissipate heat in the middle, which directly affects the stability of its performance.

And the latter also increases the brush, which not only increases the volume and complex structure, but also easily produces sparks when used, poor contact after the brush is worn out, and needs to be replaced frequently.

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