阅读说明：本技术 轴向一体式浸油无刷直流电动机位置传感器安装结构 (Axial integrated oil immersion brushless direct current motor position sensor mounting structure ) 是由 赵雅周 罗焱雯 李洋 于 2019-10-18 设计创作，主要内容包括：本发明属于无刷直流电动机技术领域,涉及一种轴向一体式浸油无刷直流电动机位置传感器安装结构,其中霍尔PCB板(9)和霍尔位置传感器(10)安装在控制器内部,且在电机本体壳体(1)与控制器壳体(5)连接位置安装有用于机械密封控制器的霍尔密封罩(6),所述霍尔密封罩(6)整体呈圆形,中部具有圆形凸起,所述圆形凸起内部空间与转子位置磁环(4)相配合,材料为导磁金属；本发明的霍尔密封罩结构可以实现控制器与电机本体之间的机械密封,霍尔传感器通过其可感应磁环磁极,实现位置检测,电机可去掉密封连接,霍尔密封罩尺寸小、厚度薄,重量轻,拆卸方便,提高了可靠性和维修性,可广泛应用于各类电动机。(The invention belongs to the technical field of brushless direct current motors, and relates to an axial integrated oil immersion brushless direct current motor position sensor mounting structure, wherein a Hall PCB (9) and a Hall position sensor (10) are mounted inside a controller, a Hall sealing cover (6) for mechanically sealing the controller is mounted at the connecting position of a motor body shell (1) and a controller shell (5), the Hall sealing cover (6) is integrally circular, a circular bulge is arranged in the middle of the Hall sealing cover, the inner space of the circular bulge is matched with a rotor position magnetic ring (4), and the Hall sealing cover is made of magnetic conductive metal; the Hall sealing cover structure can realize mechanical sealing between the controller and the motor body, the Hall sensor can sense the magnetic poles of the magnetic ring through the Hall sealing cover structure to realize position detection, the motor can be connected without sealing, and the Hall sealing cover structure has the advantages of small size, thin thickness, light weight, convenient disassembly, improved reliability and maintainability, and can be widely applied to various motors.)

1. Axial integral type immersion oil brushless DC motor position sensor mounting structure, its characterized in that: the axial integral type immersion oil brushless DC motor position sensor mounting structure contains:

the motor comprises a motor shaft (2), a rotor position magnetic ring (4), a controller shell (5), a Hall sealing cover (6), a sealing ring (7), a Hall PCB (9) and a Hall position sensor (10);

the Hall PCB (9) and the Hall position sensor (10) are installed inside the controller, a Hall sealing cover (6) used for mechanically sealing the controller is installed at the connecting position of the motor body shell (1) and the controller shell (5), the Hall sealing cover (6) is integrally circular, a circular bulge is arranged in the middle of the Hall sealing cover, the inner space of the circular bulge is matched with the rotor position magnetic ring (4), and the Hall sealing cover is made of magnetic conductive metal; the Hall sealing cover (6) is installed on the controller shell (5).

2. The axial integrated oil-immersed brushless direct current motor position sensor mounting structure according to claim 1, characterized in that: the Hall position sensor (10) is positioned around the circular bulge of the Hall sealing cover (6), and the N, S magnetic pole of the rotor position magnetic ring (4) is induced through the Hall sealing cover (6).

3. The axial integrated oil-immersed brushless direct current motor position sensor mounting structure according to claim 1, characterized in that: the rotor position magnetic ring (4) is fixed at the end part of the motor shaft (2), and the motor shaft (2) is fixed with the motor body shell (1); the Hall PCB (9) is circular, the Hall position sensors (10) are welded on bonding pads of the Hall PCB (9) in the circumferential direction, and the Hall PCB (9) is reversely fixed on the controller shell (5); the Hall PCB (9) is connected with the controller control board assembly (12), a gap is reserved between the rotor position magnetic ring (4) and the Hall sealing cover (6), and a gap is reserved between the Hall position sensor (10) and the Hall sealing cover (6).

4. The axial integrated oil-immersed brushless direct current motor position sensor mounting structure according to claim 1, characterized in that: the rotor position magnetic ring (4) is an N, S permanent magnet ring, the residual magnetism Br is more than or equal to 10000Gs, the number of the residual magnetism Br is equal to N, S, and the residual magnetism Br is uniformly distributed.

5. The axial integrated oil-immersed brushless direct current motor position sensor mounting structure according to claim 1, characterized in that: the joint of the controller shell (5) and the Hall sealing cover (6) is provided with a groove for placing a sealing ring (7); the Hall sealing cover (6) is fixed on the controller shell (5) through a screw (8).

6. The axial integrated oil-immersed brushless direct current motor position sensor mounting structure according to claim 3, characterized in that: the motor shaft (2) is fixed with the motor body shell (1) through a bearing (3).

7. The axial integrated oil-immersed brushless direct current motor position sensor mounting structure according to claim 3, characterized in that: the Hall PCB (9) is connected with a controller control panel assembly (12) through a lead (11).

8. The axial integrated oil-immersed brushless direct current motor position sensor mounting structure according to any one of claims 1 to 7, wherein: the rotor position magnetic ring (4) and the Hall position sensor (10) are positioned on the same section at the axial centers.

9. The axial integrated oil-immersed brushless direct current motor position sensor mounting structure according to any one of claims 1 to 7, wherein: the number of the Hall position sensors (10) is 3.

Technical Field

The invention belongs to the technical field of brushless direct current motors, and relates to an axial integrated oil immersion brushless direct current motor position sensor mounting structure.

Background

The brushless direct current motor has the advantages of high reliability, good speed regulation, low loss and the like, and has wide application prospect in the fields of automobiles, aerospace, ships and the like. The brushless direct current motor is composed of a motor body and a controller, the motor body and the controller are designed into an axial integrated structure form, the integrated oil immersion brushless direct current motor is mainly used for aviation and automobile fuel pump systems, drives a pump to rotate, supplies oil or transports oil for the motor, and can reduce a system sealing device during oil immersion work of the motor, improve the reliability of the system and reduce periodic maintenance.

Generally, a brushless direct current motor controller detects the position of a rotor of a motor body through a hall position sensor, and performs three-phase winding current commutation control according to a corresponding control strategy, so as to control the rotation of the motor. As shown in fig. 1, the conventional structure includes: the motor comprises a motor shaft 2, a rotor position magnetic ring 4, a controller shell 5, a sealing socket 6, a sealing ring 7, a PCB 9 and a Hall position sensor 10;

the Hall position sensor 10 needs to be installed on a PCB 9 and fixed on the periphery of a rotor position magnetic ring 4, the induction surface of the Hall position sensor 10 is opposite to the magnetic ring, a position signal is welded on a pin on one side of a sealing socket 6 through a wire 11, and then the pin on the other side of the sealing socket 6 is connected with other circuit boards 12 of a controller through a wire 14. Hall position sensor 10 and PCB board 9 are in the immersion oil state, can lead to Hall position sensor 10 and PCB board 9 reliability to reduce, and the pollutant can be attached to Hall position sensor 10 and PCB board 9 in the oil simultaneously, can cause the hidden danger that Hall position sensor 10 became invalid or PCB board 9 insulation reduces for a long time.

Disclosure of Invention

The purpose of the invention is: the axial integrated oil immersion brushless direct current motor position sensor mounting structure is designed to solve the technical problem existing in the existing structure.

In order to solve the technical problem, the technical scheme of the invention is as follows:

axial integral type immersion oil brushless DC motor position sensor mounting structure contains: the device comprises a motor shaft 2, a rotor position magnetic ring 4, a controller shell 5, a Hall sealing cover 6, a sealing ring 7, a Hall PCB 9 and a Hall position sensor 10;

the Hall PCB 9 and the Hall position sensor 10 are installed inside the controller, a Hall sealing cover 6 for mechanically sealing the controller is installed at the connecting position of the motor body shell 1 and the controller shell 5, the Hall sealing cover 6 is integrally circular, a circular bulge is arranged in the middle of the Hall sealing cover 6, the inner space of the circular bulge is matched with the rotor position magnetic ring 4, and the Hall sealing cover is made of magnetic conductive metal; the hall seal cover 6 is mounted on the controller housing 5.

The Hall position sensor 10 is positioned around the circular bulge of the Hall sealing cover 6, and the Hall sealing cover 6 is used for sensing the magnetic pole of the rotor position magnetic ring 4N, S.

The rotor position magnetic ring 4 is fixed at the end part of the motor shaft 2, and the motor shaft 2 is fixed with the motor body shell 1; the Hall PCB 9 is circular, the Hall position sensors 10 are welded on the bonding pads of the Hall PCB 9 in the circumferential direction, and the Hall PCB 9 is reversely fixed on the controller shell 5; the Hall PCB 9 is connected with the controller control panel assembly 12, a gap is reserved between the rotor position magnetic ring 4 and the Hall sealing cover 6, and a gap is reserved between the Hall position sensor 10 and the Hall sealing cover 6.

The rotor position magnetic ring 4 is an N, S permanent magnet ring, the residual magnetism Br is more than or equal to 10000Gs, the number of the residual magnetism Br is equal to N, S, and the residual magnetism Br is uniformly distributed.

A groove for placing a sealing ring 7 is formed at the joint of the controller shell 5 and the Hall sealing cover 6; the hall seal cover 6 is fixed to the controller case 5 by screws 8.

The motor shaft 2 is fixed with the motor body shell 1 through a bearing 3.

The Hall PCB 9 is connected with a controller control panel component 12 through a lead 11.

Preferably, the rotor position magnetic ring 4 and the hall position sensor 10 are positioned on the same cross section at the axial center.

Preferably, the number of hall position sensors 10 is 3.

The hall seal cap 6 is mounted on the controller housing 5 for mechanically sealing the controller, isolating the hall position sensor 10 and the hall PCB board 9 from the oil.

The Hall position sensor 10 senses the magnetic pole of the rotor position magnetic ring 4N, S through the Hall sealing cover 6 to realize position detection.

The invention has the beneficial effects that: the Hall sealing cover structure can realize mechanical sealing between the controller and the motor body, is made of a magnetic conductive material, can realize position detection by the Hall position sensor through the magnetic pole of the position sensing magnetic ring, can remove sealing connection of the motor, and has the advantages of small size, thin thickness, light weight and convenient disassembly. The problem of current immersion oil brushless DC motor exist hall sensor and installation PCB board be in the immersion oil state, the pollutant can cause hall sensor inefficacy or PCB board insulation to reduce in the oil is solved, improved motor reliability and maintainability, but the wide application is in all kinds of immersion oil brushless motor.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the embodiment of the present invention will be briefly explained. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic view of a mounting structure in the background art;

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

FIG. 3 is an enlarged view of I in FIG. 2;

the device comprises a motor body shell 1, a motor shaft 2, a bearing 3, a rotor position 4, a controller shell 5, a Hall sealing cover 6, a sealing ring 7, a screw 8, a Hall PCB 9, a Hall position sensor 10, a Hall signal lead 11, a controller control board assembly 12, a bolt 13, a first gap L1 and a second gap L2.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Features of various aspects of embodiments of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. The following description of the embodiments is merely intended to better understand the present invention by illustrating examples thereof. The present invention is not limited to any particular arrangement or method provided below, but rather covers all product structures, any modifications, alterations, etc. of the method covered without departing from the spirit of the invention.

In the drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring the present invention. Referring to fig. 2, an embodiment of the present invention will be described, in which an axial integrated oil-immersed brushless dc motor position sensor mounting structure includes: the device comprises a motor body shell 1, a motor shaft 2, a bearing 3, a rotor position magnetic ring 4, a controller shell 5, a Hall seal cover 6, a seal ring 7, a Hall seal cover fixing screw 8, a Hall PCB 9, a Hall position sensor 10, a Hall signal wire 11, a controller control panel component 12 and a bolt 13; the rotor position magnetic ring 4 is N, S rare earth permanent magnet rings which are uniformly distributed, the mark is XG28U, the residual magnetism Br is more than or equal to 10000Gs, the number of N, S is equal, the residual magnetism Br is respectively 2, the residual magnetism Br is distributed according to 90 degrees, the radial installation angle is consistent with that of rotor magnetic steel, the residual magnetism Br is adhered to the end part of the motor shaft 2, and the motor shaft is fixed with the motor body shell 1 through a bearing 3.

The Hall sealing cover 6 is of a circular structure and made of magnetic conduction steel materials, is fixed 8 on the controller shell 5 through screws uniformly distributed on the periphery, the sealing ring 7 is also of a circular structure and is placed in a circular groove at the joint of the controller shell 5 and the Hall sealing cover 6, and the Hall sealing cover 6 is fixed and the sealing ring 7 is pressed tightly; the thickness of the Hall sealing cover 6 is 1mm, the material is 1Cr18N9Ti round steel, and the sealing ring 7 is a fluorine silicon O-shaped sealing ring.

The Hall position sensors 10 are welded on a bonding pad of a Hall PCB 9 according to the distribution of angles of 120 degrees and are fixed by coating oil-resistant glue, the Hall PCB 9 is reversely fixed on a controller shell, namely the Hall position sensors 10 face the direction of a motor body, welding spots face the direction of a controller, the three Hall position sensors 10 are distributed around a Hall seal cover 6, an induction surface faces a rotor position magnetic ring, the Hall PCB 9 is an epoxy glass cloth plate, electric signals of the Hall position sensors are connected with the bonding pad through copper-clad on the PCB, and then are welded with the bonding pad through a lead, and the signals are led out to be connected with a controller control panel component 12; the Hall position sensor is a locking type Hall sensor, the type of the Hall position sensor is HS735, the center installation height is 6mm, and the second gap L2 between the Hall position sensor and the Hall sealing cover is 0.8 mm.

The motor shell 1 is connected with the controller shell 5 through bolts 13 evenly distributed on the periphery, the rotor position magnetic ring 4 is placed inside the Hall sealing cover 6, and the first gap L1 between the rotor position magnetic ring 4 and the Hall sealing cover is 1 mm; the center of the Hall position sensor is aligned with the rotor position magnetic ring; the rotor position magnetic ring 4 and the Hall position sensor 10 are positioned on the same section at the axial centers. The first clearance L1 and the second clearance L2 are adjusted according to the specification of the rotor position magnetic ring 4 and the model of the Hall position sensor 10.

The radial size, the axial size and the material of the Hall sealing cover can be adjusted according to the specifications of the magnetic ring and the Hall position sensor.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.