Five-phase motor for servo system

Abstract

The present invention belongs to the technical field of servo motors, and particularly relates to a five-phase motor for a servo system, wherein one kind of five-phase motor for a servo system comprises: a motor shaft; a rotor structure, comprising a rotor core and twelve permanent magnets, the rotor core being provided with twelve embedded holes arranged at equal intervals along the circumferential direction of the rotor core; a stator structure, comprising a stator core and a stator winding, the stator core having ten stator teeth arranged in sequence along the circumferential direction of the stator core; another kind of five-phase motor for a servo system comprises: a motor shaft; a rotor structure, comprising a rotor core and eight permanent magnets; a stator structure, comprising a stator core and a stator winding, the stator core having ten stator teeth arranged in sequence along the circumferential direction of the stator core. The present invention can improve torque density and power density, and reduce torque fluctuation.

Description

Technical Field

[0001] The invention belongs to the technical field of servo motors, and in particular relates to a five-phase motor used in a servo system. Background Art

[0002] Existing motors used in servo systems have the problem of large torque fluctuations. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a five-phase motor for a servo system, which aims to solve the problem of large torque fluctuation.

[0004] The present invention is achieved in that:

[0005] A five-phase motor for a servo system, comprising:

[0006] Motor shaft;

[0007] A rotor structure, comprising a rotor core and twelve permanent magnets, wherein the rotor core is cylindrical, sleeved with the motor shaft, and fixedly connected to the rotor structure, wherein the rotor core is provided with twelve embedded holes arranged at equal intervals along the circumferential direction of the rotor core, wherein the opening direction of the embedded holes is parallel to the extension direction of the motor shaft, wherein each of the embedded holes is respectively embedded with one of the permanent magnets, and wherein the rotor core is further provided with a magnetic isolation hole between any two adjacent embedded holes, wherein the opening direction of the magnetic isolation hole is parallel to the extension direction of the motor shaft;

[0008] A stator structure comprises a stator core and a stator winding, wherein the stator core is cylindrical and is sleeved on the rotor structure and matched with the rotor structure at intervals, the stator core has ten stator teeth arranged in sequence along the circumferential direction of the stator core, and the stator winding comprises a first A-phase winding, a first C-phase winding, a first E-phase winding, a first B-phase winding, a first D-phase winding, a second A-phase winding, a second C-phase winding, a second E-phase winding, a second B-phase winding and a second D-phase winding arranged in sequence along the circumferential direction of the stator core, and the first A-phase winding, the first C-phase winding, the first E-phase winding, the first B-phase winding, the first D-phase winding, the second A-phase winding, the second C-phase winding, the second E-phase winding, the second B-phase winding and the second D-phase winding are respectively wound on one of the stator teeth.

[0009] Optionally, the embedded hole is a bar-shaped hole, and the length direction is the radial direction of the motor shaft;

[0010] And / or, the magnetic isolation hole is a bar-shaped hole, and its length extension path is an arc centered on the axis of the motor shaft.

[0011] Optionally, the rotor core is formed by stacking a plurality of rotor punchings in a length extension direction of the motor shaft.

[0012] Optionally, the rotor core is a Spoke-type rotor structure.

[0013] Optionally, the stator core includes ten stator blocks arranged in sequence along the circumferential direction of the stator core, each of the stator blocks is formed with one stator tooth, and is formed by stacking a plurality of stator punching sheets in the length extension direction of the motor shaft.

[0014] First, based on the electronic structure of the present invention, the present invention is a five-phase motor, which can improve torque density and power density and reduce torque fluctuation compared to a three-phase motor. Secondly, the structure between the magnetic isolation hole and the embedded hole is a magnetic isolation bridge, which can effectively reduce the magnetic leakage of the permanent magnet and increase the main pole magnetic field strength, thereby increasing the motor torque. Finally, the topological structure of the present invention is a 10-slot 12-pole fractional-slot concentrated winding structure, which can be better adapted to low-speed and high-torque working conditions, and is convenient for automated production and the sinusoidal nature of the air gap flux.

[0015] The present invention also provides a five-phase motor for a servo system, comprising:

[0016] Motor shaft;

[0017] A rotor structure, comprising a rotor core and eight permanent magnets, wherein the rotor core is cylindrical and sleeved with the motor shaft and fixedly connected to the rotor structure, wherein the rotor core is provided with eight embedded holes arranged at equal intervals along the circumferential direction of the rotor core, wherein the opening direction of the embedded holes is parallel to the extension direction of the motor shaft, wherein each of the embedded holes is respectively embedded with one of the permanent magnets, and wherein the rotor core is further provided with a magnetic isolation hole between any two adjacent embedded holes, wherein the opening direction of the magnetic isolation hole is parallel to the extension direction of the motor shaft;

[0018] A stator structure comprises a stator core and a stator winding, wherein the stator core is cylindrical and is sleeved on the rotor structure and matched with the rotor structure at intervals, the stator core has ten stator teeth arranged in sequence along the circumferential direction of the stator core, and the stator winding comprises a first A-phase winding, a first C-phase winding, a first E-phase winding, a first B-phase winding, a first D-phase winding, a second A-phase winding, a second C-phase winding, a second E-phase winding, a second B-phase winding and a second D-phase winding arranged in sequence along the circumferential direction of the stator core, and the first A-phase winding, the first C-phase winding, the first E-phase winding, the first B-phase winding, the first D-phase winding, the second A-phase winding, the second C-phase winding, the second E-phase winding, the second B-phase winding and the second D-phase winding are respectively wound on one of the stator teeth.

[0019] Optionally, the embedded hole is a bar-shaped hole, and the length direction is the radial direction of the motor shaft;

[0020] And / or, the magnetic isolation hole is a bar-shaped hole, and its length extension path is an arc centered on the axis of the motor shaft.

[0021] Optionally, the rotor core is formed by stacking a plurality of rotor punchings in a length extension direction of the motor shaft.

[0022] Optionally, the rotor core is a Spoke-type rotor structure.

[0023] Optionally, the stator core includes ten stator blocks arranged in sequence along the circumferential direction of the stator core, each of the stator blocks is formed with one stator tooth, and is formed by stacking a plurality of stator punching sheets in the length extension direction of the motor shaft.

[0024] First, based on the electronic structure of the present invention, the present invention is a five-phase motor, which can improve torque density and power density and reduce torque fluctuation compared to a three-phase motor. Secondly, the structure between the magnetic isolation hole and the embedded hole is a magnetic isolation bridge, which can effectively reduce the magnetic leakage of the permanent magnet and increase the main pole magnetic field strength, thereby increasing the motor torque. Finally, the topological structure of the present invention is a 10-slot 8-pole fractional-slot concentrated winding structure, which can be better adapted to low-speed and high-torque working conditions, and is convenient for automated production and the sinusoidal nature of the air gap flux. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a structural diagram of a five-phase motor for a servo system provided in Embodiment 1 of the present invention;

[0027] Figure 2 is a structural diagram of a rotor structure provided in Embodiment 1 of the present invention;

[0028] Figure 3 is a structural diagram of a stator structure provided in Embodiment 1 of the present invention;

[0029] Figure 4 is a structural diagram of a five-phase motor for a servo system provided in Embodiment 2 of the present invention;

[0030] Figure 5 It is a structural diagram of the rotor structure provided in the second embodiment of the present invention.

[0031] Description of Figure Numbers:

[0032] Label name Label name 100 Motor shaft 200 Rotor structure 210 Rotor core 220 permanent magnet 2101 Embedded hole 2102 Magnetic isolation hole 300 Stator structure 310 Stator core 311 Stator teeth 32001 First A phase winding 32002 Second A phase winding 32003 First B phase winding 32004 Second B phase winding 32005 First C phase winding 32006 Second C phase winding 32007 First D phase winding 32008 Second D-phase winding 32009 First E phase winding 32010 Second E-phase winding DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] Embodiment 1

[0035] An embodiment of the present invention provides a five-phase motor for a servo system.

[0036] See also Figures 1 to 3 The five-phase motor for the servo system includes a motor shaft 100 , a rotor structure 200 and a stator structure 300 .

[0037] The motor shaft 100 is used to connect an external mechanical load.

[0038] The rotor structure 200 includes a rotor core 210 and twelve permanent magnets 220. The rotor core 210 is cylindrical and is sleeved on the motor shaft 100 and fixedly connected to the rotor structure 200. The rotor core 210 is provided with twelve embedded holes 2101 arranged at equal intervals along the circumferential direction of the rotor core 210. The opening direction of the embedded holes 2101 is parallel to the extension direction of the motor shaft 100. Each embedded hole 2101 is embedded with a permanent magnet 220. The rotor core 210 is also provided with a magnetic isolation hole 2102 between any two adjacent embedded holes 2101. The opening direction of the magnetic isolation hole 2102 is parallel to the extension direction of the motor shaft 100. The structure between the magnetic isolation hole 2102 and the embedded hole 2101 is a magnetic isolation bridge, which can effectively reduce the magnetic leakage of the permanent magnet 220, increase the main pole magnetic field strength, and thus increase the motor torque.

[0039] The stator structure 300 includes a stator core 310 and a stator winding. The stator core 310 is cylindrical and sleeved with the rotor structure 200 and is spaced apart from the rotor structure 200. The stator core 310 has ten stator teeth 311 arranged in sequence along the circumferential direction of the stator core 310. The stator winding includes a first A-phase winding 32001, a first C-phase winding 32005, a first E-phase winding 32009, a first B-phase winding 32003, a first D-phase winding 32007, a second A-phase winding 32008, and a second C-phase winding 32009. 2002, the second C phase winding 32006, the second E phase winding 32010, the second B phase winding 32004 and the second D phase winding 32008, the first A phase winding 32001, the first C phase winding 32005, the first E phase winding 32009, the first B phase winding 32003, the first D phase winding 32007, the second A phase winding 32002, the second C phase winding 32006, the second E phase winding 32010, the second B phase winding 32004 and the second D phase winding 32008 are respectively wound on one stator tooth 311. Figure 3 As shown, the dots and X on the wire represent the direction of the current at a certain moment (the dots represent the direction in which the current flows out of the paper, and the X represents the direction in which the current flows into the paper), which is used to represent the relationship between the motor stator winding method and the winding direction of each winding.

[0040] First, based on the electronic structure of the present invention, the present invention is a five-phase motor, which can improve torque density and power density and reduce torque fluctuation compared to a three-phase motor. Secondly, the structure between the magnetic isolation hole 2102 and the embedded hole 2101 is a magnetic isolation bridge, which can effectively reduce the magnetic leakage of the permanent magnet 220 and increase the main pole magnetic field strength, thereby increasing the motor torque. Finally, the topological structure of the present invention is a 10-slot 12-pole fractional-slot concentrated winding structure, which can be suitable for low-speed and high-torque working conditions, and is convenient for automated production and the sinusoidal nature of the air gap flux.

[0041] Specifically, in the embodiment of the present invention, the embedded hole 2101 is a bar-shaped hole, and the length direction is the radial direction of the motor shaft 100 .

[0042] The magnetic isolation hole 2102 is a bar-shaped hole, and its length extension path is an arc centered on the axis of the motor shaft 100 .

[0043] In an embodiment of the present invention, the rotor core 210 is formed by stacking a plurality of rotor punchings in the length extension direction of the motor shaft 100. The rotor core 210 is divided into a plurality of rotor punchings, which are then stacked to form a plurality of rotor punchings. This is beneficial to reducing the manufacturing difficulty of the rotor core 210 and reducing the production cost.

[0044] In the embodiment of the present invention, the rotor core 210 is a Spoke-type rotor structure 200 .

[0045] like Figure 1 As shown, in an embodiment of the present invention, the stator core 310 includes ten stator blocks arranged in sequence along the circumferential direction of the stator core 310, each stator block is formed with a stator tooth 311, and is formed by stacking a plurality of stator punchings in the length extension direction of the motor shaft 100. The stator core 310 is divided into a plurality of stator punchings, which are then stacked to form a plurality of stator punchings, which is conducive to reducing the manufacturing difficulty of the stator core 310 and reducing the production cost.

[0046] Embodiment 2

[0047] An embodiment of the present invention provides a five-phase motor for a servo system.

[0048] See also Figure 4 and Figure 5 The five-phase motor for the servo system includes a motor shaft 100 , a rotor structure 200 and a stator structure 300 .

[0049] The motor shaft 100 is used to connect an external mechanical load.

[0050] The rotor structure 200 includes a rotor core 210 and eight permanent magnets 220. The rotor core 210 is cylindrical and is sleeved on the motor shaft 100 and fixedly connected to the rotor structure 200. The rotor core 210 is provided with eight embedded holes 2101 arranged at equal intervals along the circumferential direction of the rotor core 210. The opening direction of the embedded holes 2101 is parallel to the extension direction of the motor shaft 100. Each embedded hole 2101 is embedded with a permanent magnet 220. The rotor core 210 is also provided with a magnetic isolation hole 2102 between any two adjacent embedded holes 2101. The opening direction of the magnetic isolation hole 2102 is parallel to the extension direction of the motor shaft 100. The structure between the magnetic isolation hole 2102 and the embedded hole 2101 is a magnetic isolation bridge, which can effectively reduce the magnetic leakage of the permanent magnet 220, increase the main pole magnetic field strength, and thus increase the motor torque.

[0051] The stator structure 300 includes a stator core 310 and a stator winding. The stator core 310 is cylindrical and sleeved with the rotor structure 200 and is spaced apart from the rotor structure 200. The stator core 310 has ten stator teeth 311 arranged in sequence along the circumferential direction of the stator core 310. The stator winding includes a first A-phase winding 32001, a first C-phase winding 32005, a first E-phase winding 32009, a first B-phase winding 32003, a first D-phase winding 32007, a second A-phase winding 32008, and a second C-phase winding 32009. 2002, the second C phase winding 32006, the second E phase winding 32010, the second B phase winding 32004 and the second D phase winding 32008, the first A phase winding 32001, the first C phase winding 32005, the first E phase winding 32009, the first B phase winding 32003, the first D phase winding 32007, the second A phase winding 32002, the second C phase winding 32006, the second E phase winding 32010, the second B phase winding 32004 and the second D phase winding 32008 are respectively wound on one stator tooth 311. Figure 3 As shown, the dots and X on the wire represent the direction of the current at a certain moment (the dots represent the direction in which the current flows out of the paper, and the X represents the direction in which the current flows into the paper), which is used to represent the relationship between the motor stator winding method and the winding direction of each winding.

[0052] First, based on the electronic structure of the present invention, the present invention is a five-phase motor, which can improve torque density and power density and reduce torque fluctuation compared to a three-phase motor. Secondly, the structure between the magnetic isolation hole 2102 and the embedded hole 2101 is a magnetic isolation bridge, which can effectively reduce the magnetic leakage of the permanent magnet 220 and increase the main pole magnetic field strength, thereby increasing the motor torque. Finally, the topological structure of the present invention is a 10-slot 8-pole fractional-slot concentrated winding structure, which can be better adapted to low-speed and high-torque working conditions, and is convenient for automated production and the sinusoidal nature of the air gap flux.

[0053] Specifically, in the embodiment of the present invention, the embedded hole 2101 is a bar-shaped hole, and the length direction is the radial direction of the motor shaft 100 .

[0054] The magnetic isolation hole 2102 is a bar-shaped hole, and its length extension path is an arc centered on the axis of the motor shaft 100 .

[0055] In an embodiment of the present invention, the rotor core 210 is formed by stacking a plurality of rotor punchings in the length extension direction of the motor shaft 100. The rotor core 210 is divided into a plurality of rotor punchings, which are then stacked to form a plurality of rotor punchings. This is beneficial to reducing the manufacturing difficulty of the rotor core 210 and reducing the production cost.

[0056] like Figure 1As shown, in an embodiment of the present invention, the stator core 310 includes ten stator blocks arranged in sequence along the circumferential direction of the stator core 310, each stator block is formed with a stator tooth 311, and is formed by stacking a plurality of stator punchings in the length extension direction of the motor shaft 100. The stator core 310 is divided into a plurality of stator punchings, which are then stacked to form a plurality of stator punchings, which is conducive to reducing the manufacturing difficulty of the stator core 310 and reducing the production cost.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A five-phase motor for a servo system, It is characterized in that include: Motor shaft; A rotor structure, comprising a rotor core and twelve permanent magnets, wherein the rotor core is cylindrical, sleeved with the motor shaft, and fixedly connected to the rotor structure, wherein the rotor core is provided with twelve embedded holes arranged at equal intervals along the circumferential direction of the rotor core, wherein the opening direction of the embedded holes is parallel to the extension direction of the motor shaft, wherein each of the embedded holes is respectively embedded with one of the permanent magnets, and wherein the rotor core is further provided with a magnetic isolation hole between any two adjacent embedded holes, wherein the opening direction of the magnetic isolation hole is parallel to the extension direction of the motor shaft; A stator structure comprises a stator core and a stator winding, wherein the stator core is cylindrical and is sleeved on the rotor structure and matched with the rotor structure at intervals, the stator core has ten stator teeth arranged in sequence along the circumferential direction of the stator core, and the stator winding comprises a first A-phase winding, a first C-phase winding, a first E-phase winding, a first B-phase winding, a first D-phase winding, a second A-phase winding, a second C-phase winding, a second E-phase winding, a second B-phase winding and a second D-phase winding arranged in sequence along the circumferential direction of the stator core, and the first A-phase winding, the first C-phase winding, the first E-phase winding, the first B-phase winding, the first D-phase winding, the second A-phase winding, the second C-phase winding, the second E-phase winding, the second B-phase winding and the second D-phase winding are respectively wound on one of the stator teeth.

2. The five-phase motor for a servo system as claimed in claim 1, It is characterized in that The embedded hole is a strip-shaped hole, and the length direction is the radial direction of the motor shaft; And / or, the magnetic isolation hole is a bar-shaped hole, and its length extension path is an arc centered on the axis of the motor shaft.

3. The five-phase motor for a servo system as claimed in claim 1, It is characterized in that The rotor core is formed by stacking a plurality of rotor punching sheets in the length extension direction of the motor shaft.

4. The five-phase motor for a servo system according to claim 1, It is characterized in that The rotor core is a Spoke-type rotor structure.

5. The five-phase motor for a servo system according to claim 1, It is characterized in that The stator core includes ten stator blocks arranged in sequence along the circumferential direction of the stator core, each of the stator blocks is formed with one stator tooth, and is formed by stacking a plurality of stator punching sheets in the length extension direction of the motor shaft.

6. A five-phase motor for a servo system, It is characterized in that include: Motor shaft; A rotor structure, comprising a rotor core and eight permanent magnets, wherein the rotor core is cylindrical and sleeved with the motor shaft and fixedly connected to the rotor structure, wherein the rotor core is provided with eight embedded holes arranged at equal intervals along the circumferential direction of the rotor core, wherein the opening direction of the embedded holes is parallel to the extension direction of the motor shaft, wherein each of the embedded holes is respectively embedded with one of the permanent magnets, and wherein the rotor core is further provided with a magnetic isolation hole between any two adjacent embedded holes, wherein the opening direction of the magnetic isolation hole is parallel to the extension direction of the motor shaft; A stator structure comprises a stator core and a stator winding, wherein the stator core is cylindrical and is sleeved on the rotor structure and matched with the rotor structure at intervals, the stator core has ten stator teeth arranged in sequence along the circumferential direction of the stator core, and the stator winding comprises a first A-phase winding, a first C-phase winding, a first E-phase winding, a first B-phase winding, a first D-phase winding, a second A-phase winding, a second C-phase winding, a second E-phase winding, a second B-phase winding and a second D-phase winding arranged in sequence along the circumferential direction of the stator core, and the first A-phase winding, the first C-phase winding, the first E-phase winding, the first B-phase winding, the first D-phase winding, the second A-phase winding, the second C-phase winding, the second E-phase winding, the second B-phase winding and the second D-phase winding are respectively wound on one of the stator teeth.

7. The five-phase motor for a servo system as claimed in claim 6, It is characterized in that The embedded hole is a strip-shaped hole, and the length direction is the radial direction of the motor shaft; And / or, the magnetic isolation hole is a bar-shaped hole, and its length extension path is an arc centered on the axis of the motor shaft.

8. The five-phase motor for a servo system as claimed in claim 6, It is characterized in that The rotor core is formed by stacking a plurality of rotor punching sheets in the length extension direction of the motor shaft.

9. The five-phase motor for a servo system as claimed in claim 6, It is characterized in that The rotor core is a Spoke-type rotor structure.

10. The five-phase motor for a servo system according to claim 6, It is characterized in that The stator core includes ten stator blocks arranged in sequence along the circumferential direction of the stator core, each of the stator blocks is formed with one stator tooth, and is formed by stacking a plurality of stator punching sheets in the length extension direction of the motor shaft.

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