Three-phase coil structure and motor

Abstract

The present invention provides a three-phase coil structure and a motor, wherein the three-phase coil structure comprises three-phase coil units connected in a star shape, wherein one end of the coil unit of each phase is connected to a neutral point, wherein the coil unit of each phase comprises two groups of coils, wherein each group of coils comprises an input terminal and an output terminal; in the coil units of the same phase, the input terminal of one group of coils is connected to the neutral point, and the output terminal of another group of coils is connected to the neutral point, wherein the coil units of the three phases are energized at the same time. The magnetic field generated by the three-phase coil structure of the present invention is stronger, more uniform and stable, and after being energized, the three-phase coil structure can accurately control the rotation of the rotor, so that the motor having the three-phase coil structure has higher torque performance and lower power consumption.

Description

Technical Field

[0001] The present invention relates to the field of motors, and in particular to a three-phase coil structure and a motor having the three-phase coil structure. Background Art

[0002] The existing hollow cup motor is a DC coreless servo micro motor with outstanding energy-saving characteristics, sensitive and convenient control characteristics and stable operation characteristics. Its technological advancement is very obvious. As a high-efficiency energy conversion device, it represents the development direction of motors in many fields. However, its disadvantages are low torque and high power consumption, which restricts the use of hollow cup motors in fields with high motor power consumption and torque requirements.

[0003] Therefore, it is necessary to provide a coil structure with higher motor torque performance and lower power consumption. Summary of the invention

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

[0005] The technical solution of the present invention is as follows:

[0006] In a first aspect, the present invention provides a three-phase coil structure, comprising three-phase coil units connected in a star shape, wherein one end of the coil unit of each phase is connected to a neutral point, and each phase of the coil unit comprises two groups of coils, and each group of the coils comprises an input terminal and an output terminal; in the coil units of the same phase, the input terminal of one group of the coils is connected to the neutral point, and the output terminal of another group of the coils is connected to the neutral point, wherein the coil units of the three phases are energized at the same time.

[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 a first coil unit, a second coil unit and a third coil unit respectively, the first coil unit includes the first coil group and the fourth coil, the second coil unit includes the second coil and the fifth coil, and 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 layers of coil parts.

[0010] In a second aspect, the present invention provides a motor comprising any one of the three-phase coil structures described above.

[0011] Preferably, the motor also includes a shell having a receiving space, and a stator and a rotor received in the receiving space, the rotor being rotatable relative to the stator, the rotor including a magnet rotatable relative to the shell, the stator including a three-phase coil structure with a spacer ring arranged on the circumferential side of the magnet, and the three-phase coil structure being fixed to the shell.

[0012] The beneficial effects of the present invention are as follows: in the three-phase coil structure of the present invention, one end of each phase coil unit is connected to the neutral point, each phase coil unit includes two groups of coils, and each group of coils includes an input end and an output end; in the same phase coil unit, the input end of one group of coils is connected to the neutral point, and the output end of the other group of coils is connected to the neutral point, wherein the three-phase coil units are energized at the same time, so that the magnetic field generated by the three-phase coil structure is stronger, more uniform and stable, and the three-phase coil structure after energization can accurately control the rotation of the rotor, so that the motor with the three-phase coil structure has higher torque performance and lower power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the unfolded state of the three-phase coil structure according to an embodiment of the present invention.

[0014] Figure 2 for Figure 1 The wiring diagram of the three-phase coil structure is shown.

[0015] Figure 3 Schematic diagram of the first state of the current direction of the three-phase coil structure according to an embodiment of the present invention.

[0016] Figure 4 Schematic diagram of the second state of the current direction of the three-phase coil structure according to an embodiment of the present invention.

[0017] Figure 5 Schematic diagram of the third state of the current direction of the three-phase coil structure according to an embodiment of the present invention.

[0018] Figure 6 Schematic diagram of the fourth state of the current direction of the three-phase coil structure according to an embodiment of the present invention.

[0019] Figure 7 Schematic diagram of the fifth state of the current direction of the three-phase coil structure according to an embodiment of the present invention.

[0020] Figure 8 Schematic diagram of the sixth state of the current direction of the three-phase coil structure according to an embodiment of the present invention.

[0021] Fig. 9 for Figure 1 Schematic diagram of the finished product state of the three-phase coil structure shown in the top view.

[0022] Fig.10 for Fig. 9AA cross-section diagram.

[0023] Fig.11 Schematic diagram of the working principle of the three-phase coil structure according to an embodiment of the present invention.

[0024] Fig.12 Schematic diagram of the motor structure according to an embodiment of the present invention.

[0025] Fig.13 for Fig.12 The cross-sectional structure diagram of the motor shown.

[0026] Wherein: 100-motor (10-coil structure (1-first coil unit (101-first coil (101a-incoming end, 101b-outgoing end), 102-fourth coil (102a-incoming end, 102b-outgoing end)), 2-second coil unit (201-second coil (201a-incoming end, 201b-outgoing end), 202-fifth coil (202a-incoming end, 202b-outgoing end)), 3-third coil unit (301-third coil (301a-incoming end, 301b-outgoing end), 302-sixth coil (302a-incoming end, 302b-outgoing end))), 20-neutral point, 30-housing, 40-magnetic steel). DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0028] The embodiment of the present invention provides a three-phase coil structure 10, including three-phase coil units connected in a star shape, one end of each phase coil unit is connected to a neutral point 20, each phase coil unit includes two groups of coils, each group of coils includes an inlet end and an outlet end. In the same phase coil unit, the inlet end of one group of coils is connected to the neutral point 20, and the outlet end of another group of coils is connected to the neutral point 20, wherein the three-phase coil units are energized at the same time.

[0029] As an example, the three-phase coil units are energized simultaneously so that six groups of coils are energized with direct current at the same time.

[0030] In an embodiment of the present invention, three-phase coil units are included in a star connection, one end of each phase coil unit is connected to the neutral point, each phase coil unit includes two groups of coils, and each group of coils includes an input terminal and an output terminal; in the same phase coil unit, the input terminal of one group of coils is connected to the neutral point, and the output terminal of the other group of coils is connected to the neutral point, wherein the three-phase coil units are energized at the same time, and six groups of coils generate magnetic fields at the same time, so that the magnetic field generated by the three-phase coil structure is stronger, more uniform and stable, and the three-phase coil structure after energization can accurately control the rotation of the rotor, so that the motor 100 with the three-phase coil structure has higher torque performance and lower power consumption.

[0031] In some more preferred embodiments, please refer to Figure 1 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 in sequence. 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, which increases the thickness of the three-phase coil structure 10, so that the magnetic field generated by the three-phase coil structure 10 is stronger, so that the motor 100 having the three-phase coil structure 10 has higher torque performance and lower power consumption.

[0032] In the embodiment of the present invention, the three-phase coil unit is as follows Figures 9 to 11 The hollow cylindrical structure shown. Please refer to Fig.11 As shown, 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 energized at the same time to generate a magnetic field, providing a driving force to the magnet 40, so that the magnet 40 is subjected to a uniform and stable force. The three-phase coil structure after energization can accurately control the rotation of the rotor, so that the motor 100 with the three-phase coil structure has higher torque performance and lower power consumption.

[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 as follows: Figure 3 As shown by the arrow in the middle, the direction of the current generated by the driving signal from the third coil unit 3 to the second coil unit 2 is as follows: Figure 4 As shown by the arrow in the middle, the direction of the current generated by the driving signal from the third coil unit 3 to the first coil unit 1 is as follows: Figure 5 As shown by the arrow in the middle, the direction of the current generated by the driving signal from the second coil unit 2 to the first coil unit 1 is as follows Figure 6 As shown by the arrow in the middle, the direction of the current generated by the driving signal from the second coil unit 2 to the third coil unit 3 is as follows Figure 7 As shown by the arrow in the middle, the direction of the current generated by the driving signal from the first coil unit 1 to the third coil unit 3 is as follows Figure 8 Indicated by the arrow.

[0034] In some preferred embodiments, each coil group includes a layer of coil parts, and the structure is simpler. Alternatively, each coil group includes multiple layers of coil parts, and the magnetic field strength generated by the three-phase coil structure 10 after power-on is stronger, so that the torque performance of the motor 100 with the three-phase coil structure 10 is higher. The multiple layers of coil parts can be arranged in sequence from the inside to the outside.

[0035] In some preferred embodiments, each layer of coils includes multiple turns of coils, so that the magnetic field strength generated by the three-phase coil structure 10 after power-on is stronger, and the torque performance of the motor 100 having the three-phase coil structure 10 is higher.

[0036] The embodiment of the present invention provides a motor 100, comprising any one of the above-mentioned three-phase coil structures 10. The three-phase coil structure 10 comprises three-phase coil units connected in a star shape, one end of each phase coil unit is connected to a neutral point, each phase coil unit comprises two groups of coils, each group of coils comprises an input terminal and an output terminal; in the same phase coil unit, the input terminal of one group of coils is connected to the neutral point, and the output terminal of the other group of coils is connected to the neutral point, wherein the three-phase coil units are energized at the same time, and the six groups of coils generate magnetic fields at the same time, so that the magnetic field generated by the three-phase coil structure is stronger, more uniform and stable, and the three-phase coil structure after energization can accurately control the rotation of the rotor, so that the motor 100 having the three-phase coil structure has higher torque performance and lower power consumption.

[0037] For details, please refer to Fig.12 and Fig.13 As shown, the motor 100 further includes a housing 30, a stator and a rotor. The housing 30 has a receiving space, the stator and the rotor are received in the receiving space, the rotor can rotate relative to the stator, the rotor includes a magnetic steel 40 that can rotate relative to the housing 30, the stator includes a three-phase coil structure 10 with a spacer ring arranged on the circumference of the magnetic steel 40, and the three-phase coil structure 10 is fixed to the housing 30.

[0038] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A three-phase coil structure, comprising three-phase coil units connected in a star shape, one end of each phase coil unit being connected to a neutral point, characterized in that: Each phase of the coil unit includes two groups of coils arranged opposite to each other, and each group of the coils includes an inlet terminal and an outlet terminal; in the coil units of the same phase, the inlet terminal of one group of the coils is connected to the neutral point, and the outlet terminal of the other group of the coils is connected to the neutral point, wherein the three-phase coil units are energized at the same time; 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 which are cross-stacked in sequence along the axial direction of the motor. 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 the first coil and the fourth coil, the second coil unit includes the second coil and the fifth coil, and the third coil unit includes the third coil and the sixth coil.

2. The three-phase coil structure according to claim 1, characterized in that: The three-phase coil structure is a hollow cylindrical structure.

3. The three-phase coil structure according to claim 1, characterized in that: Each group of the coils includes one or more layers of coil parts.

4. A motor, characterized in that: It comprises the three-phase coil structure as claimed in claim 1.

5. The motor according to claim 4, characterized in that The motor also includes a shell having a receiving space, and a stator and a rotor received in the receiving space, the rotor being rotatable relative to the stator, the rotor including a magnet rotatable relative to the shell, the stator including a three-phase coil structure with a spacer ring arranged on the circumferential side of the magnet, and the three-phase coil structure being fixed to the shell.

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