Salient pole motor structure adopting Hall sensor

Abstract

The utility model discloses a salient pole motor structure adopting a Hall sensor, which comprises a left end cover, a left bearing, a Hall assembly, a rotor assembly, a right bearing, a right end cover and a middle shaft, the Hall assembly comprises a Hall support, an integrated Hall circuit board and a winding assembly, the rotor assembly comprises magnetic steel, a salient pole motor rotor magnetic conductive component and a hub, the axial length of the winding assembly is H, and the axial length of the winding assembly is H; the length of the magnetic steel is E, the winding assembly is flush with one side of the magnetic steel, the salient pole motor rotor magnetic conductive component is fixed to the inner side of the hub in an annular array mode, the middle shaft is rotationally connected with the right end cover through the right bearing, the left end cover and the right end cover are connected with the hub, and the Hall chip induction end of the integrated Hall circuit board is 2.5-3.5 mm higher than the winding assembly. The distance H-E is 3-5 mm, the axial length of the winding assembly is smaller than the axial length of the rotor assembly, winding end cover magnetic steel can be used conveniently, the Hall chip induction signal exceeds the position of the corresponding face of the winding assembly, and an armature reaction area is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a structure of a salient pole motor using a Hall sensor. Background Art

[0002] With the rapid development of wheel hub motor technology, various power structure motors emerge in an endless stream. According to the current classification of the electric vehicle industry, wheel hub motors and mid-mounted inner rotor motors are the main types. Among them, the wheel hub motor and mid-mounted motor adopt built-in structure with salient polarity. The built-in structure can improve the motor speed range and increase the motor's anti-demagnetization ability. The built-in structure causes armature reaction due to the asymmetry of the dq axis magnetic circuit. Therefore, the position sensor adopts magnetic field or resolver, and the sensor installation process is complicated and the cost is high. Summary of the invention

[0003] The utility model aims at the defects of the prior art such as the complicated sensor installation process, and provides a new structure of a salient pole motor using a Hall sensor.

[0004] In order to solve the above technical problems, the utility model is implemented through the following technical solutions:

[0005] A structure of a salient pole motor using a Hall sensor comprises a left end cover, a left bearing, a Hall assembly, a rotor assembly, a right bearing, a right end cover, and a central axis. The Hall assembly comprises a Hall bracket, an integrated Hall circuit board, and a winding assembly. The rotor assembly comprises a magnetic steel, a salient pole motor rotor magnetic conductive component, and a wheel hub. The axial length of the winding assembly is H, the length of the magnetic steel is E, 3mm≤HE≤5mm, the winding assembly is flush with one side of the magnetic steel, an annular array of salient pole motor rotor magnetic conductive components is fixed on the inner side of the wheel hub, the magnetic steel is sequentially inserted between the salient pole motor rotor magnetic conductive components, the central axis passes through the winding assembly and the Hall assembly, the central axis is rotatably connected to the left end cover by means of a left bearing, the central axis is rotatably connected to the right end cover by means of a right bearing, the left end cover and the right end cover are connected to the wheel hub, a socket is provided on the outside of the winding assembly, the Hall bracket is inserted into the socket, the integrated Hall circuit board is connected to the Hall bracket, and the Hall chip sensing end of the integrated Hall circuit board is 2.5-3.5mm higher than the winding assembly.

[0006] The armature reaction mainly refers to the influence of the fundamental wave of the magnetomotive force on the main pole magnetic field, which will cause the main magnetic field to be distorted, the magnetic circuit to be saturated, demagnetized, and magnetized, resulting in inaccurate motor commutation position and premature motor load exit. The distance of HE is between 3-5mm, the axial length of the winding assembly is lower than the axial length of the rotor assembly, which is conducive to the use of winding end cap magnets, and the Hall chip sensing signal exceeds the corresponding surface position of the winding assembly, effectively avoiding the armature reaction area.

[0007] This structure uses a Hall sensor salient pole motor, and the assembly process is consistent with other motor processes. The winding assembly is made first, and then the rotor assembly is made. The rotor assembly is somewhat different from the hub surface mount motor. First, the salient pole motor rotor magnetic conductive component is firmly installed on the hub through glue or other structures, and then the magnet is inserted into the magnetic conductive component as required.

[0008] The Hall bracket is inserted into the socket on the outside of the winding assembly and connected to the Hall bracket through an integrated Hall circuit board. This design simplifies the installation and fixing process of the Hall sensor, facilitates the assembly and maintenance of the motor, and also improves the overall structural stability of the motor.

[0009] The connection design between the left and right end covers and the wheel hub, as well as the rotational connection between the middle shaft and the end covers through the left and right bearings, provide a stable and efficient rotor assembly support solution. This design helps to improve the running stability and durability of the motor, and also facilitates the assembly and disassembly of the motor.

[0010] Preferably, in the above-mentioned structure of a salient-pole motor using a Hall sensor, the length of the Hall pin of the integrated Hall circuit board is 5-6 mm.

[0011] The length of the Hall pin of the integrated Hall circuit board is 5-6mm. This design ensures that the electrical connection between the Hall sensor and the winding assembly is stable and reliable, while avoiding signal interference or unstable connection problems caused by pins that are too long or too short.

[0012] Preferably, in the structure of the salient pole motor using a Hall sensor, the magnetic conductive component of the rotor of the salient pole motor is made of silicon steel sheet.

[0013] The magnetic conductive parts of the salient pole motor rotor are made of silicon steel sheets, which have excellent magnetic properties and can improve the magnetic conductivity of the motor, reduce energy loss, and thus improve the overall performance of the motor.

[0014] Preferably, in the above-described structure of a salient pole motor using a Hall sensor, the material of the hub is a non-magnetic material.

[0015] Preferably, in the above-mentioned structure of a salient pole motor using a Hall sensor, the material of the hub is aluminum or iron.

[0016] The wheel hub is made of non-magnetic materials, such as aluminum or iron, which can effectively reduce the eddy current loss during motor operation and improve the energy efficiency of the motor. At the same time, the wheel hub made of non-magnetic materials can also help reduce the weight of the motor and improve the dynamic response speed of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an exploded view of the utility model;

[0018] Figure 2 This is an exploded view of the Hall component of the utility model;

[0019] Figure 3 It is a schematic diagram of the installation position diagram of the winding assembly and the rotor assembly of the utility model;

[0020] Figure 4 It is an exploded view of the middle rotor assembly of the utility model. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-4 The present invention is further described in detail with the following specific embodiments, but they are not intended to limit the present invention:

[0022] Example 1

[0023] A structure of a salient pole motor using a Hall sensor, comprising a left end cover 1, a left bearing 2, a Hall assembly 4, a rotor assembly 5, a right bearing 6, a right end cover 7, and a central shaft 8, wherein the Hall assembly 4 comprises a Hall bracket 41, an integrated Hall circuit board 42, and a winding assembly 43, wherein the rotor assembly 5 comprises a magnetic steel 51, a salient pole motor rotor magnetic conductive component 52, and a hub 53, wherein the axial length of the winding assembly 43 is H, the length of the magnetic steel 51 is E, HE=3mm, the winding assembly 43 is flush with one side of the magnetic steel 51, the salient pole motor rotor magnetic conductive component 52 is fixed to the inner side of the hub 53 in an annular array, and the The magnetic steel 51 is inserted between the magnetic conductive components 52 of the salient pole motor rotor in sequence, the central axis 8 passes through the winding assembly 43 and the Hall assembly 4, the central axis 8 is rotatably connected to the left end cover 1 by means of the left bearing 2, and the central axis 8 is rotatably connected to the right end cover 7 by means of the right bearing 6, the left end cover 1 and the right end cover 7 are connected to the wheel hub 53, a socket 431 is provided on the outside of the winding assembly 43, the Hall bracket 41 is inserted into the socket 431, the integrated Hall circuit board 42 is connected to the Hall bracket 41, and the Hall chip sensing end of the integrated Hall circuit board 42 is higher than the winding assembly 432.5mm.

[0024] Preferably, the length of the Hall pin of the integrated Hall circuit board 42 is 5 mm.

[0025] Preferably, the salient pole motor rotor magnetic conductive component 52 is made of silicon steel sheet.

[0026] Preferably, the hub 53 is made of non-magnetic material.

[0027] Preferably, the hub 53 is made of iron.

[0028] Example 2

[0029] A structure of a salient pole motor using a Hall sensor, comprising a left end cover 1, a left bearing 2, a Hall assembly 4, a rotor assembly 5, a right bearing 6, a right end cover 7, and a central shaft 8, wherein the Hall assembly 4 comprises a Hall bracket 41, an integrated Hall circuit board 42, and a winding assembly 43, wherein the rotor assembly 5 comprises a magnetic steel 51, a salient pole motor rotor magnetic conductive component 52, and a hub 53, wherein the axial length of the winding assembly 43 is H, the length of the magnetic steel 51 is E, HE=4mm, the winding assembly 43 is flush with one side of the magnetic steel 51, and the salient pole motor rotor magnetic conductive component 52 is fixed to the inner side of the hub 53 in an annular array, The magnetic steel 51 is inserted between the magnetic conductive components 52 of the salient pole motor rotor in sequence, the central axis 8 passes through the winding assembly 43 and the Hall assembly 4, the central axis 8 is rotatably connected to the left end cover 1 by means of the left bearing 2, and the central axis 8 is rotatably connected to the right end cover 7 by means of the right bearing 6, the left end cover 1 and the right end cover 7 are connected to the wheel hub 53, a socket 431 is provided on the outside of the winding assembly 43, the Hall bracket 41 is inserted into the socket 431, the integrated Hall circuit board 42 is connected to the Hall bracket 41, and the Hall chip sensing end of the integrated Hall circuit board 42 is higher than the winding assembly 433mm.

[0030] Preferably, the length of the Hall pin of the integrated Hall circuit board 42 is 5.5 mm.

[0031] Preferably, the salient pole motor rotor magnetic conductive component 52 is made of silicon steel sheet.

[0032] Preferably, the hub 53 is made of non-magnetic material.

[0033] Preferably, the hub 53 is made of iron.

[0034] Example 3

[0035] A structure of a salient pole motor using a Hall sensor, comprising a left end cover 1, a left bearing 2, a Hall assembly 4, a rotor assembly 5, a right bearing 6, a right end cover 7, and a central shaft 8, wherein the Hall assembly 4 comprises a Hall bracket 41, an integrated Hall circuit board 42, and a winding assembly 43, wherein the rotor assembly 5 comprises a magnetic steel 51, a salient pole motor rotor magnetic conductive component 52, and a hub 53, wherein the axial length of the winding assembly 43 is H, the length of the magnetic steel 51 is E, HE=5mm, the winding assembly 43 is flush with one side of the magnetic steel 51, the salient pole motor rotor magnetic conductive component 52 is fixed to the inner side of the hub 53 in an annular array, and the The magnetic steel 51 is inserted between the magnetic conductive components 52 of the salient pole motor rotor in sequence, the central axis 8 passes through the winding assembly 43 and the Hall assembly 4, the central axis 8 is rotatably connected to the left end cover 1 by means of the left bearing 2, and the central axis 8 is rotatably connected to the right end cover 7 by means of the right bearing 6, the left end cover 1 and the right end cover 7 are connected to the wheel hub 53, a socket 431 is provided on the outside of the winding assembly 43, the Hall bracket 41 is inserted into the socket 431, the integrated Hall circuit board 42 is connected to the Hall bracket 41, and the Hall chip sensing end of the integrated Hall circuit board 42 is higher than the winding assembly 433.5mm.

[0036] Preferably, the length of the Hall pin of the integrated Hall circuit board 42 is 6 mm.

[0037] Preferably, the salient pole motor rotor magnetic conductive component 52 is made of silicon steel sheet.

[0038] Preferably, the hub 53 is made of non-magnetic material.

[0039] Preferably, the hub 53 is made of iron.

[0040]

[0041] Table 1

[0042]

[0043] Table 2

[0044] The armature reaction (Table 1) and armature reaction avoidance (Table 2) test data show that Table 2 uses the new Hall structure (this structure) to effectively avoid the armature reaction area. The motor loading exit point is 33.2rpm and the torque is 178.6N,M. Table 1 is a traditional Hall structure, which causes armature reaction. The motor loading exits early and exits at 107rpm and 131.2NM.

[0045] Example 4

[0046] Preferably, the hub 53 is made of aluminum.

[0047] The remaining steps refer to Examples 1-3.

[0048] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the patent application for the present invention should fall within the scope of the present invention.

Claims

1. A structure of a salient pole motor using a Hall sensor, comprising a left end cover (1), a left bearing (2), a Hall assembly (4), a rotor assembly (5), a right bearing (6), a right end cover (7), and a middle shaft (8), characterized in that: The Hall assembly (4) comprises a Hall bracket (41), an integrated Hall circuit board (42), and a winding assembly (43); the rotor assembly (5) comprises a magnetic steel (51), a salient pole motor rotor magnetic conductive component (52), and a wheel hub (53); the axial length of the winding assembly (43) is H, the length of the magnetic steel (51) is E, 3mm≤HE≤5mm; the winding assembly (43) is flush with one side of the magnetic steel (51); the salient pole motor rotor magnetic conductive components (52) are annularly arrayed and fixed on the inner side of the wheel hub (53); the magnetic steel (51) is sequentially inserted between the salient pole motor rotor magnetic conductive components (52); the central axis (8) passes through The winding assembly (43) and the Hall assembly (4), the central shaft (8) and the left end cover (1) are rotatably connected by means of a left bearing (2), the central shaft (8) and the right end cover (7) are rotatably connected by means of a right bearing (6), the left end cover (1) and the right end cover (7) are connected to the wheel hub (53), a socket (431) is provided on the outside of the winding assembly (43), the Hall bracket (41) is inserted into the socket (431), the integrated Hall circuit board (42) is connected to the Hall bracket (41), and the Hall chip sensing end of the integrated Hall circuit board (42) is 2.5-3.5 mm higher than the winding assembly (43).

2. The structure of a salient pole motor using a Hall sensor according to claim 1, characterized in that: The length of the Hall pin of the integrated Hall circuit board (42) is 5-6 mm.

3. The structure of a salient pole motor using a Hall sensor according to claim 1, characterized in that: The material of the salient pole motor rotor magnetic conductive component (52) is silicon steel sheet material.

4. The structure of a salient pole motor using a Hall sensor according to claim 1, characterized in that: The hub (53) is made of a non-magnetic material.

5. The structure of a salient pole motor using a Hall sensor according to claim 4, characterized in that: The wheel hub (53) is made of aluminum or iron.

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