Motor with double-Hall structure

Abstract

The utility model relates to a motor with a double Hall structure, which comprises a rotor, a stator and a Hall assembly, the stator is arranged outside the rotor, a plurality of stator teeth are uniformly arranged on the inner circle surface of a stator core, a coil slot is formed between every two stator teeth, the coil slots are provided with notches on the inner circle surfaces of the stator teeth, pole shoes are arranged on two sides of the notches, and the Hall assembly is arranged on the stator core. Hall mounting grooves are formed in at least part of the end parts of the pole shoes; and the Hall assemblies are arranged in two groups, each group of Hall assemblies comprises a Hall sensor and a circuit board, the Hall sensors are respectively mounted in a three-phase symmetrical manner, the Hall assemblies are connected with the Hall mounting grooves, and the two groups of Hall assemblies are respectively provided with independent data lines which are connected with a controller of the motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor field, concretely is a motor with double hall structure. BACKGROUND

[0002] In the process of motor control, in order to grasp the proper commutation moment, reduce the torque fluctuation of motor, obtain the maximum torque, the detection of rotor position is very important.

[0003] Hall sensor plays the role of detecting rotor magnetic pole position, providing correct commutation information for control in motor. Hall sensor converts the position signal of rotor magnetic pole into electric signal and sends into controller, and the controller controls the commutation of stator winding, and the current in armature winding changes according to certain order with the change of rotor position, and the air gap forms step-by-step rotating magnetic field, and drives permanent magnet rotor to rotate continuously.

[0004] Now, the motor generally installs a group of hall sensors, when the hall sensor is damaged or has a fault, cannot realize the normal detection of rotor, causes the misoperation phenomenon caused by poor line access, and influences the normal work of motor. INVENTION CONTENTS

[0005] In order to solve the above technical problems, the utility model provides a motor with double hall structure.

[0006] The technical scheme adopted by the utility model is: a motor with double hall structure, including

[0007] Rotor,

[0008] Stator, which is arranged outside the rotor, a plurality of stator teeth are uniformly arranged on the inner circular surface of the stator core, a coil slot is formed between every two stator teeth, a notch is opened on the inner circular surface of the stator tooth where the coil slot is located, the notch is provided with pole shoes on both sides, and at least part of the pole shoe end is provided with a hall mounting groove;And

[0009] Hall assembly, which is arranged in two groups, each group of hall assembly includes hall sensor and circuit board, the hall sensor is respectively installed in three-phase symmetrical mode, the hall assembly is connected with the hall mounting groove, and two groups of hall assembly are respectively provided with independent data lines and connected with the controller of motor.

[0010] Further, the rotor includes a core and a permanent magnet, the core is composed of a plurality of silicon steel sheets, the silicon steel sheet is respectively provided with a weight-reducing groove and a shaft hole, the shaft hole is located at the center of the silicon steel sheet, and the weight-reducing grooves are uniformly distributed around the shaft hole;The outer edge of the silicon steel sheet is circumferentially distributed with permanent magnet mounting grooves, and the permanent magnet is embedded in the permanent magnet mounting groove.

[0011] Further, the Hall mounting slots are arranged in two groups, each group is arranged with three pairs, and each pair of Hall mounting slots is arranged on the pole shoes on both sides of the same coil slot.

[0012] In one embodiment, the motor is a square wave motor, the stator is provided with 12, forming 12 coil slots, and 12 pairs of pole shoes. The permanent magnet of the rotor includes 8 permanent magnet pieces, forming 4 magnetic pole pairs.

[0013] Further, the included angle of the adjacent two pairs of Hall mounting slots in the same group of Hall mounting slots is 30 degrees, and the two groups of Hall mounting slots are arranged symmetrically relative to the center of the stator.

[0014] Further, the electrical angle of the Hall sensors of the same group of Hall assemblies is 60°.

[0015] Further, the Hall sensors of the same group of Hall assemblies are arranged with a mechanical angle of 30°.

[0016] In another embodiment, the motor is a permanent magnet motor, the stator is provided with 12, forming 12 coil slots, and 12 pairs of pole shoes. The permanent magnet of the rotor includes 4 permanent magnet pieces, forming 2 magnetic pole pairs.

[0017] Further, the included angle of the adjacent two pairs of Hall mounting slots in the same group of Hall mounting slots is 60 degrees.

[0018] Further, the electrical angle of the Hall sensors of the same group of Hall assemblies is 60°.

[0019] Further, the Hall sensors of the same group of Hall assemblies are arranged with a mechanical angle of 60°.

[0020] The beneficial effects of the utility model are: by arranging two groups of Hall sensors, the stability of motor operation is improved, during the use of motor operation, when one Hall is damaged and has a fault, another Hall circuit can be switched, and the motor continues to operate; when the motor fails, another group of Hall sensors can be connected to detect whether the motor is in normal state, reduce the phenomenon of false return caused by poor line access, and play a double detection role on the motor. Whether the Hall sensor itself has a problem can also be judged through the structure. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole structure schematic view of the stator, rotor and Hall of a motor with double Hall structure for the first embodiment;

[0022] Figure 2 It is a structure schematic view of the rotor in Figure 1

[0023] ​Figure 3 Fig. 1 is a schematic diagram of the overall structure of a motor with a double-Hall structure according to a first embodiment of the present application; Figure 1 Fig. 2 is a schematic diagram of the arrangement of the stator and Hall mounting slots in Fig. 1;

[0024] Figure 4 Fig. 3 is a schematic diagram of the structure of the Hall in Fig. 1; Figure 1 Fig. 4 is a schematic diagram of the structure of the Hall and stator in the mounted state in Fig. 1;

[0025] Figure 5 Fig. 5 is a schematic diagram of the overall structure of a motor with a double-Hall structure according to a second embodiment of the present application; Figure 1 Fig. 6 is a schematic diagram of the structure of the Hall and stator in the mounted state in Fig. 5;

[0026] Figure 6 Fig. 7 is a schematic diagram of the overall structure of a motor with a double-Hall structure according to a third embodiment of the present application; Fig. 8 is a schematic diagram of the structure of the Hall and stator in the mounted state in Fig. 7;

[0027] Figure 7 Fig. 9 is a schematic diagram of the structure of the rotor in Fig. 7; Figure 6 Fig. 10 is a schematic diagram of the arrangement of the stator and Hall mounting slots in Fig. 7;

[0028] Figure 8 Fig. 11 is a schematic diagram of the structure of the Hall in Fig. 7; Figure 6 Fig. 12 is a schematic diagram of the structure of the Hall and stator in the mounted state in Fig. 7;

[0029] Figure 9 Fig. 13 is a schematic diagram of the overall structure of a motor with a double-Hall structure according to a fourth embodiment of the present application; Figure 6 Fig. 14 is a schematic diagram of the structure of the Hall in Fig. 13;

[0030] Figure 10 Fig. 15 is a schematic diagram of the structure of the Hall and stator in the mounted state in Fig. 13; Figure 6 Fig. 16 is a schematic diagram of the arrangement of the stator and Hall mounting slots in Fig. 13;

[0031] Fig. 1 is a schematic diagram of the overall structure of a motor with a double-Hall structure according to a first embodiment of the present application;

[0032] Fig. 2 is a schematic diagram of the arrangement of the stator and Hall mounting slots in Fig. 1;

[0033] Fig. 3 is a schematic diagram of the structure of the Hall in Fig. 1; DETAILED DESCRIPTION

[0034] Fig. 1 is a schematic diagram of the overall structure of a motor with a double-Hall structure according to a first embodiment of the present application; Figures 1-10 Fig. 1 is a schematic diagram of the overall structure of a motor with a double-Hall structure according to a first embodiment of the present application;

[0035] The rotor 1 includes an iron core 11 and a permanent magnet 12. The iron core 11 is formed by stacking multiple silicon steel sheets 111. Each silicon steel sheet 111 is provided with a weight-reducing groove 112 and a shaft hole 114. The shaft hole 114 is located at the center of the silicon steel sheet 111. The weight-reducing grooves 112 are evenly distributed around the bearing hole on the silicon steel sheet 111. Several limiting protrusions 113 are evenly distributed around the outer edge of the silicon steel sheet 111. A dovetail groove type permanent magnet mounting groove 115 is formed between two of the limiting protrusions 113. The permanent magnet 12 is embedded in the permanent magnet mounting groove 115.

[0036] The stator 2 is disposed outside the rotor 1. Multiple stator teeth 21 are evenly arranged on the inner circular surface of the stator core. A coil slot 22 is formed between every two stator teeth 21. Pole shoes 211 extending towards the coil slot 22 are provided on the inner circular surface of the stator teeth 21, with a gap between two pole shoes 211 forming a slot 23. The stator teeth 21 are provided with Hall effect mounting slots 212, which are arranged in pairs on opposite pole shoes 211 on both sides of the same slot 23.

[0037] The Hall component 3 is provided in two groups. Each group of Hall components 31 includes a Hall sensor 31 and a circuit board 32. The Hall sensors 31 are installed in a three-phase symmetrical manner. The two groups of Hall components 3 are provided with independent data lines 33 to connect to the motor controller. Example 1

[0038] like Figures 1-6 As shown, the motor in this embodiment is a square wave motor, including a stator 2, a rotor 1, and a Hall effect assembly 3. The rotor 1 includes an iron core 11 and a permanent magnet 12. The permanent magnet 12 has 4 pole pairs and 8 magnetic steel plates, with the S and N pole magnetic steel plates spaced apart. The stator teeth 21 are 12 in number, forming 12 coil slots 22 and 12 pairs of pole shoes 211. The Hall effect mounting slots 212 are arranged in two sets, with three pairs in each set, and the two sets of Hall effect mounting slots 212 are symmetrically arranged at 180° with respect to the center of the rotor 1.

[0039] The electrical angle of the Hall sensor 31 in the same group of Hall components 3 is 60°, and the mechanical angle is 30°. The first group of Hall sensors includes sensor A, sensor B, and sensor C, where sensor A is mounted with pole shoe a, sensor B with pole shoe b, and sensor C with pole shoe c. Sensor A is located at 0°, sensor B at 30°, and sensor C at 60°. A second group of Hall sensors, including sensor A', sensor B', and sensor C', is arranged in a 180° direction on the stator disk. Sensor A' is mounted with pole shoe a', sensor B' with pole shoe b', and sensor C' with pole shoe c'. Sensor A' is located at 180°, sensor B' at 210°, and sensor C' at 240°. Example 2

[0040] like Figures 7-10 As shown, the motor in this embodiment is a permanent magnet motor, including a stator 2, a rotor 1, and a Hall effect assembly 3. The rotor 1 includes an iron core 11 and a permanent magnet 12. The permanent magnet 12 has two pole pairs and four magnetic steel plates, with the S and N pole magnetic steel plates spaced apart. The stator teeth 21 are arranged in 12 positions, forming 12 coil slots 22 and 12 pairs of pole shoes 211. The Hall effect mounting slots 212 are arranged in two sets, with three pairs in each set. The electrical angle and mechanical angle of the Hall sensor 31 of the same set of Hall effect assemblies 3 are both 60°. The first set of Hall effect sensors includes sensor E, sensor F, and sensor G. Sensor E is mounted on pole shoe e, sensor F is mounted on pole shoe f, and sensor G is mounted on pole shoe g. Sensor E is located at 0°, sensor F at 60°, and sensor G at 120°. The second group of Hall sensors includes sensor E', sensor F' and sensor G'. Sensor E' is mounted with pole shoe e', sensor F' is mounted with pole shoe f', and sensor G' is mounted with pole shoe g'. Sensor E' is located at 150°, sensor F' is located at 210°, and sensor G' is located at 270°.

Claims

1. A motor with a dual Hall effect structure, comprising: Rotor, A stator, disposed outside the rotor, has a plurality of stator teeth evenly arranged on the inner circular surface of the stator core, with a coil slot formed between every two stator teeth. The coil slot has an opening on the inner circular surface of the stator teeth, and pole shoes are located on both sides of the opening. At least a portion of the pole shoes have Hall effect mounting slots at their ends. The stator is characterized in that... Also includes The Hall effect assembly consists of two sets, each including a Hall sensor and a circuit board. The Hall sensors are installed in a three-phase symmetrical manner, and the Hall effect assembly is connected to the Hall mounting slot. Each set of Hall effect assemblies is provided with an independent data line connected to the motor controller.

2. The motor with a dual Hall structure according to claim 1, characterized in that, The rotor includes an iron core and permanent magnets. The iron core is made of multiple silicon steel sheets stacked together. Each silicon steel sheet is provided with a weight-reducing groove and a shaft hole. The shaft hole is located at the center of the silicon steel sheet, and the weight-reducing grooves are evenly distributed around the shaft hole. Permanent magnet mounting grooves are evenly distributed around the outer edge of the silicon steel sheet, and the permanent magnets are embedded in the permanent magnet mounting grooves.

3. A motor with a dual Hall structure according to claim 1, characterized in that, The Hall mounting slots are provided in two sets, with three pairs in each set. Each pair of Hall mounting slots is located on the pole shoes on both sides of the slot opening of the same coil.

4. A motor with a dual Hall structure according to claim 3, characterized in that, In one embodiment, the motor is a square wave motor, the stator is provided with 12 coil slots and 12 pairs of pole shoes, the included angle between two adjacent pairs of Hall mounting slots in the same group of Hall mounting slots is 30 degrees, and the two groups of Hall mounting slots are symmetrically arranged at 180° with respect to the center of the stator.

5. A motor with a dual Hall structure according to claim 4, characterized in that, The electrical angle of the Hall sensor in the same group of Hall components is 60°.

6. A motor with a dual Hall structure according to claim 4, characterized in that, The Hall sensors of the same group of Hall components are set at a mechanical angle of 30°.

7. A motor with a dual Hall structure according to claim 3, characterized in that, The motor is a permanent magnet motor. The stator has 12 slots, forming 12 coil slots and 12 pairs of pole shoes. The included angle between two adjacent pairs of Hall mounting slots in the same group is 60 degrees.

8. A motor with a dual Hall effect structure according to claim 7, characterized in that, The electrical angle of the Hall sensor in the same group of Hall components is 60°.

9. A motor with a dual Hall structure according to claim 7, characterized in that, The Hall sensors of the same group of Hall components are set at a mechanical angle of 60°.

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