Axial magnetic field miniature two-phase permanent magnet direct current motor

Abstract

A miniature two-phase permanent magnet direct-current motor with an axial magnetic field is characterized in that two stators are formed by cylindrical iron cores and annular windings wound on the cylindrical iron cores, flat magnetic steel is fixed on a rotor plate to form a rotor, centers of the stators and the rotor are sleeved on a shaft, an air gap is formed between the stators and the rotor to form an axial magnetic field structure, and the two stators are arranged in the axial magnetic field structure. The cylindrical iron core comprises an outer iron core with an outer iron core turning lug and an inner iron core with an inner iron core turning lug, the outer iron core turning lug is flush with the inner iron core turning lug, the inner iron core is arranged in the outer iron core, an annular winding is wound between the outer wall of the inner iron core and the inner wall of the outer iron core, and the two stators are opposite in spatial position and are spaced by a 90-degree electrical angle to form a two-phase winding, so that the stator can rotate directionally. The rotor is positioned inside the stator to form an inner rotor or outside the stator to form an outer rotor; the motor is simple in structure, simple in process, easy to produce and manufacture, high in utilization rate of raw materials, good in integrity and light in weight, the two stators are separated by the 90-degree electrical angle to realize two-phase output, the process is simplified, the power of the motor is improved, and good social and economic benefits are achieved.

Description

Technical Field

[0001] The utility model relates to a rotating motor, in particular to an axial magnetic field micro two-phase permanent magnet DC motor. Background Art

[0002] Unidirectional permanent magnet DC motors have no directional torque and are unstable in operation. Three-phase motors have directional torque, but have more sensors, which makes the control device complex. The motors have more wiring, which adds a lot of trouble. Existing motors generally have radial magnetic fields, and the stator core is a stack of punched sheets with wires embedded in the slots, which results in a lot of scrap, complex processes, low utilization of raw materials, and is labor-intensive and time-consuming. In particular, traditional radial magnetic fields require tile-shaped magnetic steel, which is complex to process and difficult to form. In addition, the radial magnetization process is complex, and the magnetization quality is much lower than that of axial magnetization, making the whole machine clumsy. Therefore, improving the structure and innovating is an inevitable trend. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide an axial magnetic field miniature two-phase permanent magnet DC motor, which can effectively solve the problems of non-directional starting and too many sensors and connections.

[0004] To achieve the above-mentioned purpose, the technical solution provided by the utility model is an axial magnetic field micro two-phase permanent magnet DC motor, comprising a stator, a rotor and a shaft, wherein the stator is composed of a cylindrical core and an annular winding wound thereon, a flat magnetic steel is fixed on a rotor plate to form a rotor, the center of the stator and the rotor is sleeved on the shaft, the stator and the rotor are axially arranged relative to each other, an air gap is formed between the stator and the rotor, and an axial magnetic field structure is formed, wherein the stator is provided with two, the cylindrical core comprises an inner iron core with an inner iron core, and the inner iron core comprises an inner iron core with ... An inner iron core with an inner core ear and an outer iron core with an outer core ear, the outer core ear is flush with the inner core ear, forming a stator end face, the inner iron core is placed inside the outer iron core, an annular winding is wound between the outer wall of the inner iron core and the inner wall of the outer iron core, forming a stator, the two stators are opposite in space and separated by an electrical angle of 90° to form a two-phase winding, the rotor is located on the inner side of the stator to form an inner rotor, or on the outer side to form an outer rotor, and an air gap is formed between the flat magnetic steel on the rotor and the end face formed by the outer core ear and the inner core ear.

[0005] The utility model has a simple structure, most of the components are stamping parts, the process is simple, easy to produce, high raw material utilization, good integrity, light weight, the stator uses space separated by 90° electrical angle to achieve two-phase output, and then obtains directional starting torque, simplifies the process, improves the power of the motor, and has good social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a cross-sectional view of a two-phase motor with an outer rotor structure of the utility model.

[0007] Figure 2 It is a cross-sectional view of a two-phase motor with an inner rotor structure of the utility model.

[0008] Figure 3 This is a front view of the end face of the six-pole stator of the utility model.

[0009] Figure 4 It is a front view of the end face of the six-pole rotor of the outer rotor structure of the utility model.

[0010] Figure 5 It is a front view of the end face of the six-pole rotor of the inner rotor structure of the utility model.

[0011] Figure 6 It is a schematic diagram of the stator structure of the utility model. DETAILED DESCRIPTION

[0012] The specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings and specific circumstances.

[0013] Combined with Figure 1-6 A micro two-phase permanent magnet DC motor with an axial magnetic field is provided, comprising a stator, a rotor and a shaft, wherein the stator is composed of a cylindrical core and a ring winding 8 wound thereon, a flat magnetic steel 5 is fixed on a rotor plate to constitute a rotor, the center of the stator and the rotor is sleeved on a shaft 1, the stator and the rotor are axially arranged opposite to each other, an air gap 6 is formed between the stator and the rotor to constitute an axial magnetic field structure, and the stator is characterized in that the stator is provided with two cylindrical cores, comprising an outer core 7 with an outer core ear 7-1 and an inner core 9 with an inner core ear 9-1, the outer core ear 7-1 is flush with the inner core ear 9-1 to constitute a stator end face. The inner core 9 is placed inside the outer core 7, and a ring winding 8 is wound between the outer wall of the inner core 9 and the inner wall of the outer core 7 to form a stator. The two stators are opposite in space and separated by an electrical angle of 90° to form a two-phase winding. The rotor is located on the inner side of the stator to form an inner rotor, or on the outer side to form an outer rotor. An air gap 6 is formed between the flat magnetic steel 5 on the rotor and the end surface formed by the outer core ear 7-1 and the inner core ear 9-1. Since the two stators are opposite in space and separated by an electrical angle of 90° to form a two-phase winding, the conditions for directional starting are met, which effectively solves the problems of non-directional starting and a large number of sensors and connections.

[0014] To ensure a better implementation effect, the two stators are centered and each is equipped with a ring winding 8. The bottoms of the two stators are opposite to each other, separated by an electrical angle of 90°, and are fixed together by the shaft through the center of the shaft 1 to form a stator structure with end faces facing outward. The rotor is located outside the stator. The rotor is composed of a magnetic rotor plate 4-1 and a flat magnetic steel 5 with an axial magnetic field with alternating polarity. The flat magnetic steel 5 is evenly fixed on the periphery of the inner side of the magnetic rotor plate 4-1 and is opposite to the end face formed by the outer iron core ear 7-1 and the inner iron core ear 9-1. The center of the magnetic rotor plate 4-1 is installed on both ends of the shaft 1 through the bearing 2 and is fixed by the bearing cover 3. The circumference of the two magnetic rotor plates 4-1 is connected as a whole through the casing 10, and forms a double-stator, double-rotor, double-air-gap outer rotor rotating structure that is axially fixed relative to the shaft 1, such as Figure 1 shown.

[0015] The one rotor is in the center, and the two stator end faces are located outside the rotor at an electrical angle of 90°. The rotor is composed of a non-magnetic rotor plate 4-2 and a flat magnetic steel 5. The flat magnetic steel 5 is embedded in the periphery of the non-magnetic rotor plate 4-2. The center of the non-magnetic rotor plate 4-2 is fixed to the shaft 1 through a nut 11. The two stator centers are equipped with bearings 2 to support both ends of the shaft 1. The shaft 1 and the rotor thereon rotate freely. The bearing cover 3 fixes the bearing 2. The two stator circumferences are connected as a whole through a casing 10 and are fixed, forming an axially relatively rotating double-stator, single-rotor, double-air-gap inner rotor rotating structure, such as Figure 2 shown.

[0016] The flat magnetic steels 5 at the two ends of the rotor have like poles facing each other, forming a main magnetic flux parallel structure.

[0017] The flat magnetic steels 5 at the two ends of the rotor have opposite magnetic poles, forming a main magnetic flux series structure.

[0018] The outer core 7 is in the shape of a hollow cylinder, and the opening is provided with uniformly distributed outer core ears 7-1 turned inwardly, the inner core 9 is in the shape of a hollow cylinder with a diameter smaller than that of the outer core 7, the inner core 9 is placed in the outer core 7, and the opening of the inner core 9 is provided with uniformly distributed inner core ears 9-1 turned outwardly, the outer core ears 7-1 and the inner core ears 9-1 are staggered, as shown in FIG. Figure 6 shown.

[0019] like Figure 1 As shown, the bottoms of the two stators are spaced 90 degrees apart in electrical angle relative to each other to form a two-phase winding. The rotor is composed of a magnetic rotor plate 4-1 and axially magnetized flat magnets 5 evenly distributed on its periphery and alternately placed with polarity. The two identical rotors are connected to the two ends of the shaft 1 through the bearing 2 at the center of the magnetic rotor plate 4-1 and are connected as a whole by the casing 10, forming an axially relatively rotating outer rotor rotating structure with double stators, double rotors and double air gaps, and the rotors rotate around the shaft 1.

[0020] like Figure 2 As shown, the two stator end faces are opposite to each other, so that the windings on the two stators form a two-phase winding with a leading and lagging electrical angle of 90°. The rotor is composed of a non-magnetic rotor plate 4-2 and a flat magnetic steel 5 embedded in the periphery of the non-magnetic rotor plate 4-2. The center of the non-magnetic rotor plate 4-2 is fixed to the shaft 1 through a nut 11. The two stator centers are installed at both ends of the shaft 1 through bearings 2, supporting the rotation of the shaft 1 and fixing the bearings 2 through bearing covers 3 to form a stator structure with opposite end faces. The two stator circumferences are connected as a whole through a casing 10, forming an inner rotor rotating structure with double stators, single rotors, and double air gaps that rotate axially relative to the rotor. The rotation of the shaft 1 drives the rotor to rotate.

[0021] The utility model can be operated as a two-phase AC generator without changing the structure.

[0022] The utility model has a simple structure, few components, most of which are stamping parts, simple process, easy production and manufacturing, low production cost, high raw material utilization rate, good integrity, light weight, high power, and the stators are placed at an electrical angle of 90° to achieve two-phase output. The process is simple and the weight is reduced. It is suitable for small aircraft power motors, etc., and has good social and economic benefits.

[0023] In the description of the present utility model, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any technician familiar with the profession can make changes or modify the above disclosed technical contents into equivalent embodiments without departing from the technical solution of the present invention, which all fall within the protection scope of the present invention.

Claims

1. An axial magnetic field micro two-phase permanent magnet DC motor, comprising a stator, a rotor and a shaft, wherein the stator is composed of a cylindrical iron core and an annular winding (8) wound thereon, a flat magnetic steel (5) is fixed on a rotor plate to form a rotor, the center of the stator and the rotor is sleeved on the shaft (1), the stator and the rotor are axially arranged opposite to each other, an air gap (6) is formed between the stator and the rotor, and an axial magnetic field structure is formed, characterized in that: The stator is provided with two, the cylindrical iron core comprises an outer iron core (7) with an outer iron core ear (7-1) and an inner iron core (9) with an inner iron core ear (9-1), the outer iron core ear (7-1) and the inner iron core ear (9-1) are flush with each other to form a stator end face, the inner iron core (9) is arranged inside the outer iron core (7), an annular winding (8) is wound between the outer wall of the inner iron core (9) and the inner wall of the outer iron core (7) to form a stator, the two stators are opposite in spatial position and separated by an electrical angle of 90 degrees to form a two-phase winding, the rotor is located inside the stator to form an inner rotor, or is located outside the stator to form an outer rotor, and an air gap (6) is formed between the flat magnetic steel (5) on the rotor and the end face formed by the outer iron core ear (7-1) and the inner iron core ear (9-1).

2. The axial magnetic field micro two-phase permanent magnet DC motor according to claim 1 is characterized in that: The two stators are centered and each is provided with an annular winding (8). The bottoms of the two stators are opposite to each other and are separated by an electrical angle of 90°. The two stators are fixed together by the shaft through the center through the shaft (1), forming a stator structure with end faces facing outward. The rotor is located outside the stator. The rotor is composed of a magnetic rotor plate (4-1) and a flat magnetic steel (5) with an axial magnetic field with alternating polarities. The flat magnetic steel (5) is evenly fixed on the inner side periphery of the magnetic rotor plate (4-1) and is opposite to the end face formed by the outer iron core ear (7-1) and the inner iron core ear (9-1). The center of the magnetic rotor plate (4-1) is installed on both ends of the shaft (1) through a bearing (2) and is fixed by a bearing cover (3). The circumferences of the two magnetic rotor plates (4-1) are connected as a whole through a casing (10), and form a double-stator, double-rotor, double-air-gap outer rotor rotating structure with the stator being axially fixed relative to the shaft (1).

3. The axial magnetic field micro two-phase permanent magnet DC motor according to claim 1, characterized in that: The rotor is centered, and the two stator end faces are located outside the rotor at an electrical angle of 90 degrees. The rotor is composed of a non-magnetic rotor plate (4-2) and a flat magnetic steel (5). The flat magnetic steel (5) is embedded in the periphery of the non-magnetic rotor plate (4-2). The center of the non-magnetic rotor plate (4-2) is fixed to the shaft (1) through a nut (11). Bearings (2) are installed in the centers of the two stators to support the two ends of the shaft (1). The shaft (1) and the rotor thereon rotate freely. The bearing cover (3) fixes the bearing (2). The circumferential surfaces of the two stators are connected as a whole through a casing (10) and are fixed, forming an axially relatively rotating double-stator, single-rotor, double-air-gap inner rotor rotating structure.

4. The axial magnetic field micro two-phase permanent magnet DC motor according to claim 2 is characterized in that: The flat magnetic steels (5) of the rotors at both ends have like magnetic poles facing each other, forming a main magnetic flux parallel structure.

5. The axial magnetic field micro two-phase permanent magnet DC motor according to claim 2 is characterized in that: The flat magnetic steels (5) at the two ends of the rotor have opposite magnetic poles, forming a main magnetic flux series structure.

6. The axial magnetic field micro two-phase permanent magnet DC motor according to claim 1, characterized in that: The outer iron core (7) is in the shape of a hollow cylinder, and is provided with uniformly distributed outer iron core ears (7-1) at its opening and turned inwardly toward the cylinder. The inner iron core (9) is in the shape of a hollow cylinder with a diameter smaller than that of the outer iron core (7). The inner iron core (9) is arranged in the outer iron core (7), and is provided with uniformly distributed inner iron core ears (9-1) at its opening and turned outwardly toward the cylinder. The outer iron core ears (7-1) and the inner iron core ears (9-1) are arranged alternately.

Images