Three-phase coil structure and motor

Abstract

The present application provides a three-phase coil structure and a motor. The three-phase coil structure comprises three phases of coil units connected in a star configuration, one end of each phase of coil units is connected to a neutral point, each phase of coil units comprises two groups of coils, and each group of coils comprise a wire inlet end and a wire outlet end; in the same phase of coil units, the wire inlet end of one group of coils is connected to the neutral point, and the wire outlet end of the other group of coils is connected to the neutral point; and the three phases of coil units are electrified at the same time. A magnetic field generated by the three-phase coil structure of the present application is stronger, more uniform and more stable, and the three-phase coil structure can accurately control the rotation of a rotor after being electrified, so that a motor having the three-phase coil structure has higher torque performance and lower power consumption.

Description

Three-phase coil structure and motor Technical Field

[0001] This application relates to the field of electric motors, specifically to a three-phase coil structure and an electric motor having the three-phase coil structure. Background Technology

[0002] Existing coreless motors are DC coreless servo micro motors, which have outstanding energy-saving characteristics, sensitive and convenient control characteristics, and stable operation characteristics. Their technological advancement is very obvious. As a high-efficiency energy conversion device, they represent the development direction of motors in many fields. However, their disadvantages are low torque and high power consumption, which restricts the use of coreless motors in fields with high requirements for motor power consumption and torque.

[0003] Therefore, it is necessary to provide a coil structure with higher motor torque performance and lower power consumption. Technical issues

[0004] The purpose of this application is to provide a three-phase coil structure and motor to solve the technical problems of low motor torque performance and high power consumption in the prior art. Technical solutions

[0005] The technical solution of this application is as follows:

[0006] In a first aspect, this application provides a three-phase coil structure, which includes three-phase coil units connected in a star configuration. One end of each phase coil unit is connected to a neutral point. Each phase coil unit includes two sets of coils, and each set of coils includes an input terminal and an output terminal. In the same phase coil unit, the input terminal of one set of coils is connected to the neutral point, and the output terminal of the other set of coils is connected to the neutral point, wherein the three phase coil units are energized simultaneously.

[0007] Preferably, the three-phase coil structure includes a first coil, a second coil, a third coil, a fourth coil, a fifth coil, and a sixth coil arranged in sequence. The three-phase coil units are respectively a first coil unit, a second coil unit, and a third coil unit. The first coil unit includes a first coil group and the fourth coil. The second coil unit includes the second coil and the fifth coil. The third coil unit includes the third coil and the sixth coil.

[0008] Preferably, the three-phase coil structure is a hollow cylindrical structure.

[0009] Preferably, each group of coils includes one or more coil sections.

[0010] Secondly, this application provides an electric motor including any of the three-phase coil structures described above.

[0011] Preferably, the motor further includes a housing with a receiving space, and a stator and a rotor housed within the receiving space. The rotor is rotatable relative to the stator. The rotor includes magnets rotatable relative to the housing. The stator includes a three-phase coil structure spaced around the magnets. The three-phase coil structure is fixed to the housing. Beneficial effects

[0012] The beneficial effects of this application are as follows: In the three-phase coil structure of this application, one end of each phase coil unit is connected to the neutral point, and each phase coil unit includes two sets of coils, each set of coils including an input terminal and an output terminal; in the same phase coil unit, the input terminal of one set of coils is connected to the neutral point, and the output terminal of the other set of coils is connected to the neutral point. The three-phase coil units are energized simultaneously, which makes the magnetic field generated by the three-phase coil structure stronger, more uniform and stable. The energized three-phase coil structure can precisely control the rotation of the rotor, resulting in higher torque performance and lower power consumption of the motor with this three-phase coil structure. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the unfolded state of the three-phase coil structure according to an embodiment of this application.

[0014] Figure 2 is a schematic diagram of the wiring method of the three-phase coil structure shown in Figure 1.

[0015] Figure 3 is a schematic diagram of the first state of the current direction of the three-phase coil structure according to an embodiment of this application.

[0016] Figure 4 is a schematic diagram of the second state of the current direction of the three-phase coil structure according to an embodiment of this application.

[0017] Figure 5 is a schematic diagram of the third state of the current direction of the three-phase coil structure according to an embodiment of this application.

[0018] Figure 6 is a schematic diagram of the fourth state of the current direction of the three-phase coil structure according to an embodiment of this application.

[0019] Figure 7 is a schematic diagram of the fifth state of the current direction of the three-phase coil structure according to an embodiment of this application.

[0020] Figure 8 is a schematic diagram of the sixth state of the current direction of the three-phase coil structure in an embodiment of this application.

[0021] Figure 9 is a top view of the finished product of the three-phase coil structure shown in Figure 1.

[0022] Figure 10 is a cross-sectional view of Figure 9 (AA section).

[0023] Figure 11 is a schematic diagram of the working principle of the three-phase coil structure in the embodiment of this application.

[0024] Figure 12 is a schematic diagram of the motor structure according to an embodiment of this application.

[0025] Figure 13 is a cross-sectional view of the motor shown in Figure 12.

[0026] Wherein: 100-motor (10-coil structure (1-first coil unit (101-first coil (101a-inlet, 101b-outlet), 102-fourth coil (102a-inlet, 102b-outlet)), 2-second coil unit (201-second coil (201a-inlet, 201b-outlet), 202-fifth coil (202a-inlet, 202b-outlet)), 3-third coil unit (301-third coil (301a-inlet, 301b-outlet), 302-sixth coil (302a-inlet, 302b-outlet))), 20-neutral point, 30-shell, 40-magnet). Embodiments of the present invention

[0027] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0028] This application provides a three-phase coil structure 10, including three-phase coil units connected in a star configuration. One end of each phase coil unit is connected to a neutral point 20. Each phase coil unit includes two sets of coils, and each set of coils includes an input terminal and an output terminal. In the same phase coil unit, the input terminal of one set of coils is connected to the neutral point 20, and the output terminal of the other set of coils is connected to the neutral point 20. The three-phase coil units are energized simultaneously.

[0029] As an example, energizing a three-phase coil unit simultaneously means energizing six coils simultaneously with DC current.

[0030] In this embodiment, a three-phase coil unit is included, which is connected in a star configuration. One end of each phase coil unit is connected to the neutral point. Each phase coil unit includes two sets of coils, and each set of coils includes an input terminal and an output terminal. In the same phase coil unit, the input terminal of one set of coils is connected to the neutral point, and the output terminal of the other set of coils is connected to the neutral point. The three-phase coil units are energized simultaneously, and the six sets of coils generate a magnetic field simultaneously. This makes the magnetic field generated by the three-phase coil structure stronger, more uniform, and more stable. The energized three-phase coil structure can precisely control the rotation of the rotor, resulting in higher torque performance and lower power consumption for the motor with this three-phase coil structure.

[0031] In some preferred embodiments, referring to FIG1, the three-phase coil structure includes a first coil 101, a second coil 201, a third coil 301, a fourth coil 102, a fifth coil 202, and a sixth coil 302 arranged sequentially. The three-phase coil units are respectively a first coil unit 1, a second coil unit 2, and a third coil unit 3. The first coil unit 1 includes a first coil 101 and a fourth coil 102, the second coil unit 2 includes a second coil 201 and a fifth coil 202, and the third coil unit 3 includes a third coil 301 and a sixth coil 302. The first coil 101, the second coil 201, the third coil 301, the fourth coil 102, the fifth coil 202, and the sixth coil 302 are arranged in a cross-layered manner, increasing the thickness of the three-phase coil structure 10, making the magnetic field generated by the three-phase coil structure 10 stronger, thereby making the motor 100 with this three-phase coil structure 10 have higher torque performance and lower power consumption.

[0032] In this embodiment, the three-phase coil unit is a hollow cylindrical structure as shown in Figures 9 to 11. Referring to Figure 11, the first coil 101, the second coil 201, the third coil 301, the fourth coil 102, the fifth coil 202, and the sixth coil 302 are simultaneously energized to generate a magnetic field, providing driving force to the magnet 40. This ensures that the magnet 40 is subjected to uniform and stable force. The energized three-phase coil structure can precisely control the rotation of the rotor, resulting in higher torque performance and lower power consumption for the motor 100 with this three-phase coil structure.

[0033] Specifically, the direction of the current generated by the driving signal from the first coil unit 1 to the second coil unit 2 is shown by the arrow in Figure 3; the direction of the current generated by the driving signal from the third coil unit 3 to the second coil unit 2 is shown by the arrow in Figure 4; the direction of the current generated by the driving signal from the third coil unit 3 to the first coil unit 1 is shown by the arrow in Figure 5; the direction of the current generated by the driving signal from the second coil unit 2 to the first coil unit 1 is shown by the arrow in Figure 6; the direction of the current generated by the driving signal from the second coil unit 2 to the third coil unit 3 is shown by the arrow in Figure 7; and the direction of the current generated by the driving signal from the first coil unit 1 to the third coil unit 3 is shown by the arrow in Figure 8.

[0034] In some preferred embodiments, each group of coils includes a single coil layer, resulting in a simpler structure. Alternatively, each group of coils may include multiple coil layers, leading to a stronger magnetic field generated by the three-phase coil structure 10 after energization, thus resulting in higher torque performance of the motor 100 with the three-phase coil structure 10. The multiple coil layers can be arranged sequentially from the inside out.

[0035] In some preferred embodiments, each coil layer includes multiple turns of coil, which makes the magnetic field strength generated by the three-phase coil structure 10 after being energized stronger, and makes the motor 100 with the three-phase coil structure 10 have higher torque performance.

[0036] This application provides a motor 100, including any of the three-phase coil structures 10 described above. The three-phase coil structure 10 includes three-phase coil units connected in a star configuration. One end of each phase coil unit is connected to the neutral point. Each phase coil unit includes two sets of coils, and each set of coils includes an input terminal and an output terminal. In the same phase coil unit, the input terminal of one set of coils is connected to the neutral point, and the output terminal of the other set of coils is connected to the neutral point. When the three-phase coil units are energized simultaneously, all six sets of coils generate a magnetic field simultaneously, making the magnetic field generated by the three-phase coil structure stronger, more uniform, and more stable. The energized three-phase coil structure can precisely control the rotation of the rotor, resulting in higher torque performance and lower power consumption for the motor 100 with this three-phase coil structure.

[0037] Specifically, as shown in Figures 12 and 13, the motor 100 also includes a housing 30, a stator, and a rotor. The housing 30 has a receiving space in which the stator and rotor are received. The rotor can rotate relative to the stator and includes a magnet 40 that can rotate relative to the housing 30. The stator includes a three-phase coil structure 10 with spacers arranged around the magnet 40 and fixed to the housing 30.

[0038] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A three-phase coil structure comprising three-phase coil units connected in a star configuration, wherein one end of each phase coil unit is connected to a neutral point, characterized in that, Each phase of the coil unit includes two sets of coils, each set of coils including an input terminal and an output terminal; in the same phase of the coil unit, the input terminal of one set of coils is connected to the neutral point, and the output terminal of the other set of coils is connected to the neutral point, wherein the three phases of the coil unit are energized simultaneously.

2. The three-phase coil structure as described in claim 1, characterized in that, The three-phase coil structure includes a first coil, a second coil, a third coil, a fourth coil, a fifth coil, and a sixth coil arranged in sequence. The three-phase coil units are respectively a first coil unit, a second coil unit, and a third coil unit. The first coil unit includes a first coil group and the fourth coil. The second coil unit includes the second coil and the fifth coil. The third coil unit includes the third coil and the sixth coil.

3. The three-phase coil structure as described in claim 1, characterized in that, The three-phase coil structure is a hollow cylindrical structure.

4. The three-phase coil structure as described in claim 1, characterized in that, Each group of coils includes one or more coil sections.

5. An electric motor, characterized in that, Includes the three-phase coil structure as described in claim 1.

6. The motor as described in claim 5, characterized in that, The motor further includes a housing with a receiving space, and a stator and a rotor housed within the receiving space. The rotor is rotatable relative to the stator. The rotor includes magnets that are rotatable relative to the housing. The stator includes a three-phase coil structure spaced around the magnets. The three-phase coil structure is fixed to the housing.

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