Large-torque direct current motor stator structure

Abstract

The utility model discloses a stator structure of a large-torque direct current motor, which relates to the technical field of large-torque stators and comprises a punching sheet iron core. The punching sheet iron core is provided with a wire duct. The number of the wire grooves is 24. A plurality of Hall sensor placing notches are formed between the wire slots at intervals; the included angle between the vertical surface and the inclined surface of the Hall sensor placing notch is an angle C; a plurality of punching sheet iron cores are arranged and are fixedly connected in a welding manner; the punching sheet iron core is installed on the rotating shaft, the coil penetrates through the multiple wire grooves, the working efficiency is effectively guaranteed, the Hall PCB is installed in the Hall sensor placing groove opening between the two wire grooves, and therefore when the stator works, when current passes through a conductor located in a magnetic field, the Hall sensor can be placed in the Hall sensor placing groove opening. The magnetic field can apply a transverse Lorentz force to charge carriers in the conductor, so that the charge carriers are gathered on the two sides of the conductor, a potential difference is formed on the two sides of the conductor, and the torque is adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of large-torque stators, in particular to a large-torque DC motor stator structure. Background Art

[0002] The stator of a high-torque DC motor is mainly composed of a stator core and stator windings. The stator core is usually made of laminated silicon steel sheets, and its function is to provide a magnetic circuit and reduce magnetic resistance and eddy current losses. The stator winding is wound around the stator core using a specific winding method to generate a magnetic field.

[0003] High-torque motors are mostly used in large-scale machinery and equipment, electric vehicle drive systems, and large ship propulsion systems to provide strong power support. However, the resistance of the stator winding of traditional DC motors will cause a certain amount of power loss and generate a certain amount of heat. Sparks will be generated during the contact and relative movement between the brushes and the commutator. This will not only cause wear and corrosion of the commutator, shortening its service life, but also pose a safety hazard in some special environments, such as flammable and explosive places.

[0004] After searching, Chinese patent publication number CN201320618185.3 discloses a stator and rotor punching structure for an automobile starter; it includes a stator and a rotor, the rotor includes a rotating shaft, a rotor core, and rotor slots, the rotor slots are pear-shaped slots, the number of which is 11, and the stator includes a stator core and stator slots, the stator slots are U-shaped slots, the number of which is 24, and both the rotor slots and the stator slots are evenly distributed along the circumference of the rotating shaft axis;

[0005] When the structure in the above patent is working, it utilizes the space of the rotor core to achieve the output of large torque of the stator during operation. However, the torque in the above patent cannot be effectively adjusted. In this way, during use, it continuously outputs at a certain torque, which will cause torque waste in application scenarios with low torque. Utility Model Content

[0006] The purpose of the utility model is to provide a high-torque DC motor stator structure. In this structure, a Hall sensor placement slot is opened between two wire slots, and a plurality of Hall sensor placement slots are provided. In this way, during operation, when current passes through a conductor located in a magnetic field, the magnetic field will exert a transverse Lorentz force on the charge carriers in the conductor, causing them to gather on both sides of the conductor, thereby forming an electric potential difference on both sides of the conductor; by measuring the magnitude and direction of the Hall voltage, the strength and direction of the magnetic field can be determined; in this way, during operation, the torque of the stator can be effectively adjusted, thereby effectively adjusting the torque of the motor; so as to solve the problems of the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A high-torque DC motor stator structure includes a punched core; the punched core is provided with wire slots; there are 24 wire slots; multiple Hall sensor placement notches are spaced apart between the wire slots; the included angle between the vertical surface and the inclined surface of the Hall sensor placement notch is angle C; the angle C is 42°;

[0009] The punching core is provided with a plurality of sheets and fixedly connected by welding to ensure the stability of the punching core;

[0010] As a further technical solution of the present invention, the outer edge of the punching core is provided with a plurality of inclined grooves and marking grooves; wherein the inclined grooves are arranged in a W shape;

[0011] As a further technical solution of the present invention, the angle between the two short sides of the protrusion inside the inclined groove is angle D; the angle D is 90°, and the angle between the adjacent short sides and long sides in the inclined groove is angle E, and the angle E is 60°;

[0012] As a further technical solution of the present invention, a marking groove with a radius of 1.27 is provided on one side of the chute; the angle F between the axis of the marking groove and the midline of the two short sides of the chute is 15°;

[0013] As a further technical solution of the present invention, the two side edges of the wire slot are inclined, and the end of the wire slot away from the outer edge of the punching core is convex, wherein the angle between the oblique side of the convex shape and the straight side is angle G; the angle G is 100 degrees, so that when working, the motor rotates more smoothly and avoids jamming.

[0014] As a further technical solution of the present invention, the Hall sensor placement slots are provided with 6;

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] In the present invention, when in use, the punched iron core is mounted on the rotating shaft, and the coil is passed through a plurality of wire slots, effectively ensuring working efficiency. A Hall effect PCB circuit board is mounted in the Hall effect sensor placement slot between two of the wire slots. In this way, when the stator is working, when current passes through a conductor located in a magnetic field, the magnetic field exerts a transverse Lorentz force on the charge carriers in the conductor, causing them to gather on both sides of the conductor, thereby forming an electric potential difference on both sides of the conductor.

[0017] The utility model can effectively measure the stator magnetic field strength by measuring the size and direction of the Hall voltage, and can also adjust the stator torque, thereby effectively meeting the needs of different working scenarios of the motor, and effectively ensuring that the stator is smoother during operation through the angle at the bottom of the wire slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of the present utility model.

[0019] Figure 2 This utility model Figure 1 A magnified view of the local structure at point A.

[0020] Figure 3 This utility model Figure 1 A magnified view of the local structure at point B.

[0021] Figure 4 This utility model Figure 1 A magnified view of the local structure at point C.

[0022] In the figure: 1-punched iron core, 2-wire slot, 3-Hall sensor placement slot, 4-bevel slot, 5-marking slot. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-4 In an embodiment of the present invention, a high-torque DC motor stator structure includes a punching core 1; the punching core 1 is provided with wire slots 2; the wire slots 2 are provided with 24; a plurality of Hall sensor placement notches 3 are provided at intervals between the plurality of wire slots 2; the included angle between the vertical surface and the inclined surface of the Hall sensor placement notch 3 is angle C;

[0025] The punching core 1 is provided with a plurality of sheets and fixedly connected by welding;

[0026] The outer edge of the punching core 1 is provided with a plurality of inclined grooves 4 and marking grooves 5; wherein the inclined grooves 4 are arranged in a W shape;

[0027] By adopting the above technical solution, when in use, the punching core 1 is mounted on the rotating shaft, and the coil is passed through multiple slots 2, effectively ensuring working efficiency. In addition, the Hall PCB circuit board is installed in the Hall sensor placement slot 3 between two of the slots 2. In this way, when the stator is working, when current passes through a conductor located in a magnetic field, the magnetic field will exert a transverse Lorentz force on the charge carriers in the conductor, causing them to gather on both sides of the conductor, thereby forming a potential difference on both sides of the conductor;

[0028] In this embodiment, the included angle between the two short sides of the protrusion inside the inclined groove 4 is angle D; in the inclined groove 4, the included angle between the adjacent short sides and the long side is angle E;

[0029] A marking groove 5 with a radius of 1.27 is provided on one side of the inclined groove 4; the angle between the axis of the marking groove 5 and the midlines of the two short sides of the inclined groove 4 is angle F;

[0030] By adopting the above technical solution, by measuring the magnitude and direction of the Hall voltage, the stator magnetic field strength can be effectively measured, and the stator torque can be adjusted, thereby effectively meeting the needs of different working scenarios of the motor. The angle at the bottom of the slot 2 can effectively ensure that the stator works more smoothly.

[0031] In this embodiment, the two side edges of the wire slot 2 are inclined, and the end of the wire slot 2 away from the outer edge of the punching core 1 is convex, wherein the angle between the oblique side and the straight side of the convex shape is angle G;

[0032] The Hall sensor placement slots 3 are provided with 6, so that when the stator is working, the rotor can continuously adjust the intensity of the magnetic field, thereby achieving different required adjustment processing of the motor torque.

[0033] The working principle of the utility model is as follows: when in use, the punching core 1 is mounted on the rotating shaft, the coil is passed through a plurality of wire slots 2, and the working efficiency is effectively guaranteed. The Hall PCB circuit board is installed in the Hall sensor placement slot 3 between two of the wire slots 2. In this way, when the stator is working, when current passes through a conductor located in a magnetic field, the magnetic field will exert a transverse Lorentz force on the charge carriers in the conductor, causing them to gather on both sides of the conductor, thereby forming a potential difference on both sides of the conductor;

[0034] By measuring the magnitude and direction of the Hall voltage, the stator magnetic field strength can be effectively measured, and the stator torque can be adjusted to effectively meet the needs of different working scenarios of the motor. The angle at the bottom of the slot 2 can effectively ensure that the stator works more smoothly.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0036] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high-torque DC motor stator structure, characterized by: The invention comprises a punched iron core (1); a wire slot (2) is provided on the punched iron core (1); 24 wire slots (2) are provided; a plurality of Hall sensor placement slots (3) are provided at intervals between the plurality of wire slots (2); the included angle between the vertical surface and the inclined surface of the Hall sensor placement slot (3) is angle C; The punching iron core (1) is provided in plurality and is fixedly connected by welding.

2. The high-torque DC motor stator structure according to claim 1, characterized in that: The outer edge of the punching core (1) is provided with a plurality of inclined grooves (4) and marking grooves (5); wherein the inclined grooves (4) are arranged in a W shape.

3. The high-torque DC motor stator structure according to claim 2, characterized in that: The included angle between the two short sides of the internal protrusion of the inclined groove (4) is angle D; and the included angle between the adjacent short sides and the long side of the inclined groove (4) is angle E.

4. The high-torque DC motor stator structure according to claim 3, characterized in that: A marking groove (5) with a radius of 1.27 is provided on one side of the inclined groove (4); the angle between the axis of the marking groove (5) and the midlines of the two short sides of the inclined groove (4) is angle F.

5. The high-torque DC motor stator structure according to claim 1, characterized in that: The two side edges of the wire slot (2) are arranged in an inclined manner, and the end of the wire slot (2) away from the outer edge of the punching core (1) is arranged in a convex shape, wherein the angle between the oblique side and the straight side of the convex shape is angle G.

6. The high-torque DC motor stator structure according to claim 1, characterized in that: There are six Hall sensor placement notches (3).

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