CN213754132U

CN213754132U - Three-phase DC brushless motor

Info

Publication number: CN213754132U
Application number: CN202022689858.7U
Authority: CN
Inventors: 钱志存; 高桂林; 田军
Original assignee: Zhongshan Jingjiu Electric Machinery Co ltd
Current assignee: Zhongshan Jingjiu Electric Machinery Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-07-20
Anticipated expiration: 2030-11-19

Abstract

The utility model discloses a three-phase DC brushless motor, including stator module, rotor subassembly, main shaft and cup joint at the antifriction bearing at main shaft both ends and be used for the end cover of fixed motor, the rotor subassembly includes a plurality of permanent magnet who takes the synthesis of N magnetic pole and S magnetic pole, and a plurality of permanent magnet forms permanent magnet polarity N utmost point S pole alternate distribution and equipartition on annular structure and the magnetic circuit, stator module includes stator core and the enameled wire of winding on stator core, permanent magnet sets up flutedly at the center, is provided with a clearance between the adjacent permanent magnet, the width in clearance is the same with the width in recess. The utility model discloses a structure sets up rationally, and it has a clearance between recess and adjacent permanent magnet seted up at the permanent magnet center, and the clearance is the same with the width of recess, can avoid three-phase direct current brushless motor to be less than the vibrations that both ends magnetic force caused because of middle magnetic force when the operation, is favorable to improving and uses stationarity and reliability, and the suitability is strong and the practicality is good.

Description

Three-phase DC brushless motor

Technical Field

The utility model belongs to the technical field of DC brushless motor, concretely relates to three-phase DC brushless motor.

Background

The brushless DC motor has the advantages of high efficiency, energy saving and convenient control. The three-phase dc brushless motor body is generally composed of a stator assembly, a rotor assembly, a shaft, a bearing, and an end cap or base. Stator core opens has a plurality of notches, and the rotor subassembly mainly comprises permanent magnetic material according to certain rule, and permanent magnetic material can be filled a plurality of pairs of magnetic pole, and direct current brushless three-phase direct current brushless motor just has tooth's socket torque like this, and tooth's socket torque is big to three-phase direct current brushless motor start-up, and the operation shifts, and the brake all has great harmful effects, and three-phase direct current brushless motor cycle vibrations are big, and sound is big. The application of the three-phase direct current brushless motor is disturbed, and particularly in the application environment with high noise requirement and strict vibration requirement, the applicability and the practicability are limited.

Disclosure of Invention

The utility model aims at providing a structure sets up reasonable and three-phase direct current brushless motor that the practicality is strong.

The technical scheme of the realization the utility model is a three-phase DC brushless motor, including stator module, rotor subassembly, main shaft and cup joint at the antifriction bearing at main shaft both ends and be used for the end cover of fixed motor, the rotor subassembly includes a plurality of synthetic permanent magnet of taking N magnetic pole and S magnetic pole, and a plurality of permanent magnet forms permanent magnet polarity N utmost point S utmost point alternate distribution and equipartition on annular structure and the magnetic circuit, stator module includes stator core and the enameled wire of winding on stator core, permanent magnet sets up flutedly in the center, is provided with a clearance between the adjacent permanent magnet, the width in clearance is the same with the width in recess.

The rotor assembly further comprises a magnetic conduction ring, the stator core is sleeved on the main shaft, seven permanent magnets are arranged on the end cover or the inner wall of the magnetic conduction ring in an annular and uniform distribution mode, and the number of the seven permanent magnets is seven.

The depth of the groove is 1/4-1/3 of the thickness of the permanent magnet, and the magnetic conductive ring is an aluminum gold ring body.

The thickness of the permanent magnet is 4-6 mm, and the groove is a rectangular groove or a semicircular groove.

The permanent magnet is made of ferrite or neodymium iron boron.

The utility model discloses has positive effect: the utility model discloses a structure sets up rationally, it has a clearance between recess and adjacent permanent magnet seted up at the permanent magnet center to the clearance is the same with the width of recess, makes moment balance effect better, makes the rotor rotate more steady, also can avoid three-phase DC brushless motor to be less than the vibrations that both ends magnetic force caused because of middle magnetic force when the operation simultaneously, is favorable to improving and uses stationarity and reliability, installs simple swift moreover, and the suitability is strong and the practicality is good.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the following specific embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is a partially enlarged view of fig. 2.

Detailed Description

(example 1)

Fig. 1 to 3 show an embodiment of the present invention, wherein fig. 1 is a schematic sectional view of the present invention; FIG. 2 is a schematic structural view of the present invention; fig. 3 is a partially enlarged view of fig. 2.

Referring to fig. 1 to 3, a three-phase dc brushless motor includes a stator module 1, a rotor module 2, a main shaft 3, a rolling bearing 4 sleeved at two ends of the main shaft, and an end cover 5 for fixing the motor, where the rotor module 2 includes a plurality of permanent magnets 21 with N-poles and S-poles synthesized, the plurality of permanent magnets form an annular structure and are distributed and uniformly distributed in an alternating manner on the magnetic circuit with the N-poles and the S-poles of the permanent magnets in polarity, the stator module 1 includes a stator core 11 and an enameled wire 12 wound on the stator core, a groove 6 is provided at the center of the permanent magnet 21, a gap 7 is provided between adjacent permanent magnets, and the width of the gap is the same as the width of the groove. Like the width of d1 and d2 in fig. 2, because the clearance is the same, thereby can avoid appearing middle magnetic force and being weaker than the magnetic force of both ends magnet, thereby avoid three-phase DC brushless motor can appear vibrations when the operation, install simple swift moreover.

The rotor assembly 2 further comprises magnetic conductive rings, the stator core is sleeved on the main shaft, seven permanent magnets are arranged on the end cover or the inner wall of the magnetic conductive rings in an annular and uniform distribution mode, and the number of the seven permanent magnets is seven.

The permanent magnet is made of ferrite or neodymium iron boron.

The utility model discloses a structure sets up rationally, it has a clearance between recess and adjacent permanent magnet seted up at the permanent magnet center to the clearance is the same with the width of recess, makes moment balance effect better, makes the rotor rotate more steady, also can avoid three-phase DC brushless motor to be less than the vibrations that both ends magnetic force caused because of middle magnetic force when the operation simultaneously, is favorable to improving and uses stationarity and reliability, installs simple swift moreover, and the suitability is strong and the practicality is good.

The standard parts used in the present embodiment can be purchased directly from the market, and the non-standard structural parts described in the specification can also be obtained directly by processing according to the common general knowledge of the prior art without any doubt, and the connection mode of the parts adopts the conventional means matured in the prior art, and the machines, parts and equipment adopt the conventional models in the prior art, so that the detailed description is not given here.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious changes and modifications which fall within the spirit of the invention are deemed to be covered by the present invention.

Claims

1. The utility model provides a three-phase DC brushless motor, includes stator module, rotor subassembly, main shaft and cup joints the antifriction bearing at main shaft both ends and is used for the end cover of fixed motor, its characterized in that: the rotor subassembly includes a plurality of permanent magnet that take the N magnetic pole and the S magnetic pole is synthetic, and permanent magnet polarity N utmost point S utmost point alternate distribution and equipartition on a plurality of permanent magnet formed ring structure and the magnetic circuit, stator module includes stator core and the enameled wire of winding on stator core, permanent magnet sets up flutedly in the center, is provided with a clearance between the adjacent permanent magnet, the width in clearance is the same with the width in recess.

2. The three-phase dc brushless motor of claim 1, wherein: the rotor assembly further comprises a magnetic conduction ring, the stator core is sleeved on the main shaft, seven permanent magnets are arranged on the end cover or the inner wall of the magnetic conduction ring in an annular and uniform distribution mode, and the number of the seven permanent magnets is seven.

3. The three-phase dc brushless motor of claim 2, wherein: the depth of the groove is 1/4-1/3 of the thickness of the permanent magnet, and the magnetic conductive ring is an aluminum gold ring body.

4. The three-phase dc brushless motor of claim 3, wherein: the thickness of the permanent magnet is 4-6 mm, and the groove is a rectangular groove or a semicircular groove.

5. The three-phase dc brushless motor of claim 4, wherein: the permanent magnet is made of ferrite or neodymium iron boron.