Motor and driving system

Abstract

The utility model provides a motor, which comprises a casing, a stator, a rotor and a stator winding arranged on the stator, the stator and the rotor are arranged in the casing, the stator is fixedly connected with the casing, and the stator winding is formed by winding flat wires. The utility model also provides a driving system comprising the motor. The torque and the rotating speed of the motor can be improved under the condition that the size of the motor is limited, so that the performance of the motor is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of new energy power systems, and in particular to a motor and a drive system including the motor. Background Art

[0002] The motor is the power source of new energy engineering machinery, and the output torque and speed of the motor are important performance indicators of the motor. However, the space of new energy engineering machinery such as new energy mining trucks is relatively tight, and there are also restrictions on the size of the power system, which in turn will limit the output torque and speed of the motor.

[0003] How to improve the motor's output torque, speed and other performance indicators while maintaining size limitations has become an urgent problem to be solved. Utility Model Content

[0004] Embodiments of the present disclosure provide a motor and a drive system including the motor.

[0005] In a first aspect, an embodiment of the present disclosure provides a motor, comprising a casing, a stator, a rotor, and a stator winding arranged on the stator, wherein the stator and the rotor are arranged inside the casing, the stator is fixedly connected to the casing, and the stator winding is formed by winding a flat wire.

[0006] In some embodiments, an output through hole is opened at the first end of the casing, and the driving shaft of the motor extends to the outside of the casing through the output through hole; a supporting groove is provided on the side of the output through hole facing the inside of the casing, and the stator is fitted in the supporting groove and fixedly connected to the casing.

[0007] In some embodiments, the motor further includes a support member disposed on a side of the stator away from the support groove, and the support member is fixedly connected to the housing to limit the stator in the support groove.

[0008] In some embodiments, the support member includes a first annular portion and a second annular portion extending from the first annular portion; the inner diameter of the inner hole of the first annular portion is smaller than the outer diameter of the stator, and the inner diameter of the inner hole of the second annular portion matches the outer diameter of the stator; the support member is fixedly connected to the casing, and the first annular portion is located on the side of the second annular portion away from the stator, limiting the stator in the support groove and the inner hole of the second annular portion.

[0009] In some embodiments, the second annular portion is provided with a notch along the axial direction for accommodating stator outgoing wires.

[0010] In some embodiments, the motor further includes a carbon brush assembly, wherein the carbon brush assembly is disposed on a side of the second annular portion facing away from the stator.

[0011] In some embodiments, at least one fixing through hole is formed on the stator, and a bolt passes through the fixing through hole to connect with the housing, thereby fixing the stator in the supporting groove.

[0012] In some embodiments, the rotor is sleeved on the drive shaft and is disposed in an inner hole of the stator; the rotor exceeds the stator by a first length in a direction close to the output through hole, and exceeds the stator by a second length in a direction away from the output through hole.

[0013] In some embodiments, the motor further includes magnetic steels, and the magnetic steels are arranged in a double V shape.

[0014] In some embodiments, a junction box is disposed at the second end of the housing, and the stator outgoing wires are connected to the high-voltage cable through the junction box.

[0015] In some embodiments, the stator outgoing wire includes a stator outgoing wire copper bar, which is electrically connected to the stator winding; the stator outgoing wire copper bar is also electrically connected to an outgoing wire screw, the outgoing wire screw is electrically connected to a terminal, and the terminal is electrically connected to the high-voltage cable.

[0016] In some embodiments, the connection terminal comprises an L-shaped connection terminal or a soft copper busbar.

[0017] In some embodiments, the motor further comprises an insulating sleeve disposed between the housing and the lead screw, a first sealing ring is disposed between the insulating sleeve and the housing, and a second sealing ring is disposed between the insulating sleeve and the lead screw.

[0018] In some embodiments, the casing includes an inner shell and an outer shell, the inner shell is sleeved in the outer shell; the inner shell includes an inner cylindrical portion and an inner end cover portion arranged at one end of the inner cylindrical portion, and the inner cylindrical portion and the inner end cover portion are an integral structure; the outer shell includes an outer cylindrical portion and an outer end cover portion arranged at one end of the outer cylindrical portion, and the outer cylindrical portion and the outer end cover portion are an integral structure; the inner end cover portion and the outer end cover portion are located at opposite ends of the casing.

[0019] In some embodiments, a cooling water channel is arranged between the outer wall of the inner shell and the inner wall of the outer shell; the cooling water channel includes a first water channel connected to the water inlet and a second water channel connected to the water outlet, and the first water channel and the second water channel are alternately arranged in the axial direction.

[0020] In some embodiments, the water inlet and the water outlet are arranged at an end of the housing away from the output through hole.

[0021] In some embodiments, at an end of the housing away from the output through hole, the water inlet and the water outlet are arranged on opposite sides.

[0022] In a second aspect, an embodiment of the present disclosure provides a drive system, which includes a reducer and at least one motor, wherein the reducer includes an output shaft and at least one input shaft, and the input shaft is coupled to the motor in a one-to-one correspondence; the motor is the motor described in the first aspect of the embodiment of the present disclosure.

[0023] The disclosed embodiments increase the output torque and rotation speed of the motor while meeting the size restrictions of the motor, thereby improving the performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of a motor in an embodiment of the present disclosure;

[0025] Figure 2 is a schematic diagram of a stator winding in an embodiment of the present disclosure;

[0026] Figure 3 is a cross-sectional view of a motor in an embodiment of the present disclosure;

[0027] Figure 4 is a schematic diagram of a support member in an embodiment of the present disclosure;

[0028] Figure 5 is a schematic diagram of the assembly of a stator and a rotor in an embodiment of the present disclosure;

[0029] Figure 6 is a schematic diagram of a magnetic steel in an embodiment of the present disclosure;

[0030] Figure 7 is a schematic diagram of an axial outlet in an embodiment of the present disclosure;

[0031] Figure 8 It is a schematic diagram of a casing in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the technical solution of the present disclosure is described in detail below with reference to the accompanying drawings.

[0033] Example embodiments will be described more fully below with reference to the accompanying drawings, but the example embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. On the contrary, the purpose of providing these embodiments is to make the present disclosure thorough and complete and to enable those skilled in the art to fully understand the scope of the present disclosure.

[0034] In the absence of conflict, the various embodiments of the present disclosure and the various features therein may be combined with each other.

[0035] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] The terms used herein are only used to describe specific embodiments and are not intended to limit the present disclosure. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise. It will also be understood that when the terms "comprising" and / or "made of" are used in this specification, the presence of the features, wholes, steps, operations, elements and / or components is specified, but the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof is not excluded.

[0037] The embodiments described herein may be described with reference to plan views and / or cross-sectional views by means of idealized schematic diagrams of the present disclosure. Therefore, the example illustrations may be modified according to manufacturing techniques and / or tolerances. Therefore, the embodiments are not limited to the embodiments shown in the accompanying drawings, but include modifications of the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the accompanying drawings have schematic properties, and the shapes of the regions shown in the figures illustrate the specific shapes of the regions of the elements, but are not intended to be limiting.

[0038] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted as having an idealized or overly formal meaning unless explicitly defined as such herein.

[0039] Figure 1 is a schematic diagram of a motor in an embodiment of the present disclosure, Figure 2 is a schematic diagram of a stator winding in an embodiment of the present disclosure, Figure 3 is a cross-sectional view of a motor in an embodiment of the present disclosure.

[0040] like Figure 1 , Figure 2 , Figure 3 As shown, in the embodiment of the present disclosure, the motor includes a housing 1, a stator 2, and a rotor 3, and the stator winding is arranged on the stator; the stator 2 and the rotor 3 are arranged inside the housing 1, and the stator 2 is fixedly connected to the housing 1; Figure 2 As shown, the stator winding is made of flat wire.

[0041] In the disclosed embodiment, the stator winding of the motor adopts the form of multi-layer flat wire winding, which improves the stator slot fill rate, thereby improving the motor efficiency, reducing losses and heat generation; the stator winding wound by flat wire is smaller in size, which is conducive to saving the internal space of the motor and can output greater torque without changing the volume.

[0042] like Figure 3 As shown, in the embodiment of the present disclosure, an output through hole is opened at the first end of the casing 1, and the driving shaft 4 of the motor extends to the outside of the casing 1 through the output through hole; a supporting groove 11 is provided on the side of the output through hole facing the inside of the casing 1, and the stator 2 is mounted in the supporting groove 11 and fixedly connected to the casing 1.

[0043] The disclosed embodiment does not specifically limit how to fix the stator 2 to the housing 1 .

[0044] In some embodiments, Figure 3 As shown, the motor further includes a support member 5 disposed on a side of the stator 2 away from the support slot 11 . The support member 5 is fixedly connected to the housing 1 to limit the stator 2 in the support slot 11 .

[0045] Figure 4 is a schematic diagram of a support member 5 in an embodiment of the present disclosure, Figure 3 For application Figure 4 A sectional view of the electric machine is shown with the support 5 being shown.

[0046] like Figure 3 , Figure 4 As shown, the support member 5 includes a first annular portion 51 and a second annular portion 52 extending from the first annular portion 51; the inner diameter of the inner hole of the first annular portion 51 is smaller than the outer diameter of the stator 2, and the inner diameter of the inner hole of the second annular portion 52 matches the outer diameter of the stator 2; the support member 5 is fixedly connected to the casing 1, and the first annular portion 51 is on the side of the second annular portion 52 away from the support groove 11, so that the stator 2 is limited in the support groove 11 and the inner hole of the second annular portion 52.

[0047] like Figure 4 As shown, the second annular portion 52 is provided with a notch 521 along the circumferential direction for accommodating the stator outgoing wires.

[0048] In the embodiments of the present disclosure, Figure 4 The support member 5 shown can also be used as a carbon brush holder for supporting the carbon brush assembly. Figure 3 As shown, the carbon brush assembly 6 of the motor is arranged on a side of the first annular portion 52 facing away from the stator 2 .

[0049] In some embodiments, Figure 3 As shown, the carbon brush assembly 6 is connected and fixed to the support member 5 by bolts.

[0050] In some embodiments, at least one fixing through hole is formed on the stator 2 , and bolts are passed through the fixing through hole to connect with the housing 1 , so that the stator 2 is fixed in the supporting groove 11 without the support member 5 .

[0051] Figure 3 and Figure 4 The support member 5 shown is an integrated structure, which can play the role of both the stator pressure plate and the carbon brush holder. The use of the support member 5 with an integrated structure in the motor can reduce the number of parts and improve the utilization rate of the internal space of the motor; it can also reduce the difficulty of the assembly process and save the manufacturing cost of the motor; the reduction in the number of parts and the simplicity of the assembly process are also conducive to improving the reliability of the motor.

[0052] Figure 5 It is a schematic diagram of the assembly of a resolver stator and a resolver rotor in an embodiment of the present disclosure.

[0053] like Figure 5 As shown, the rotor 3 is sleeved on the drive shaft 4, and the rotor 3 is arranged in the inner hole of the stator 2; the axial length of the rotor is b, which is greater than the axial length a of the stator; the rotor 3 exceeds the stator 2 by a first length c in the direction close to the output end, and the rotor 3 exceeds the stator 2 by a second length e in the direction away from the output end. In the embodiment disclosed in the present disclosure, the output end is the first end.

[0054] During the operation of the motor, the torque output at the drive end will generate reverse thrust in the axial direction, causing axial vibration, which in turn causes the stator and rotor to shift and cause a resolver failure. In the disclosed embodiment, the stator 2 and the rotor 3 adopt an asymmetric installation structure, which is conducive to expanding the threshold range of the motor resolver failure and reducing the resolver failure rate of the motor; by improving the stability and reliability of the motor resolver signal output, it is conducive to improving the output torque accuracy of the motor system and improving the NVH performance of the motor; further, it can also improve the reliability of the motor system, extend the overall service life of the motor, and reduce after-sales maintenance costs.

[0055] Figure 6 It is a schematic diagram of a magnetic steel in an embodiment of the present disclosure.

[0056] like Figure 6 As shown, the magnetic steel in the motor is arranged in a double V shape.

[0057] In the disclosed embodiments, the maximum speed of the motor is increased by optimizing the air gap length, optimizing the stator and rotor punching topology, double V-shaped arrangement of magnetic steel, multi-section skew poles, adjusting the thickness of the magnetic isolation bridge, etc., thereby improving the operating efficiency of the motor.

[0058] Figure 7 It is a schematic diagram of an axial outlet line in an embodiment of the present disclosure.

[0059] like Figure 7As shown, a junction box 12 is provided at the second end of the housing 1 , and the stator outgoing wires are connected to the high-voltage cables through the junction box 12 .

[0060] like Figure 7 As shown, the stator outgoing wire includes a stator outgoing wire copper bar 21, which is electrically connected to the stator winding 22; the stator outgoing wire copper bar 21 is also electrically connected to the outgoing wire screw 23, the outgoing wire screw 23 is electrically connected to the wiring terminal 24, and the wiring terminal 24 is electrically connected to the high-voltage cable 25.

[0061] In the embodiment of the present disclosure, the connection terminal 24 includes an L-shaped connection terminal or a soft copper busbar.

[0062] The disclosed embodiment realizes axial wiring, which is beneficial to saving space of the casing 1, reducing the radial size of the casing 1, and improving the output torque while meeting the size restrictions of the motor.

[0063] like Figure 7 As shown, the motor further includes an insulating sleeve 7 disposed between the housing 1 and the lead screw 23 , a first sealing ring 81 is disposed between the insulating sleeve 7 and the housing 1 , and a second sealing ring 82 is disposed between the insulating sleeve 7 and the lead screw 23 .

[0064] In the embodiment of the present disclosure, the first sealing ring 81 and the second sealing ring 82 are provided to effectively block the flow of water vapor between the inside of the motor and the junction box 12, and effectively prevent the generation of condensation on the motor.

[0065] Figure 8 It is a schematic diagram of a casing in an embodiment of the present disclosure.

[0066] like Figure 8 As shown, the housing 1 includes an inner housing 13 and an outer housing 14, and the inner housing 13 is sleeved in the outer housing 14;

[0067] The inner shell 13 includes an inner cylindrical portion and an inner end cover portion arranged at one end of the inner cylindrical portion, and the inner cylindrical portion and the inner end cover portion are an integral structure; the outer shell 14 includes an outer cylindrical portion and an outer end cover portion arranged at one end of the outer cylindrical portion, and the outer cylindrical portion and the outer end cover portion are an integral structure; the inner end cover portion and the outer end cover portion are located at opposite ends of the casing 1.

[0068] like Figure 8 As shown, a cooling water channel is arranged between the outer wall of the inner shell 13 and the inner wall of the outer shell 14; the cooling water channel includes a first water channel connected to the water inlet and a second water channel connected to the water outlet, and the first water channel and the second water channel are alternately arranged in the axial direction.

[0069] In some embodiments, the inner wall of the outer shell is a conical surface, and the outer diameter surface of the backflow ribs constituting the water channel on the outer wall of the inner shell 13 is also a conical surface, forming a conical surface structure with a draft angle, making it easier to assemble the inner shell 13 and the outer shell 14. Setting the outer diameter surface of the guide rib as a conical surface increases the matching area between the outer diameter surface of the guide rib and the inner wall of the outer shell 14, which is conducive to reducing the interference stress between the guide rib and the outer shell, and avoiding material yield failure.

[0070] In the disclosed embodiment, the first water channel and the second water channel are alternately arranged, and the flow directions of the cooling liquid in the first water channel and the second water channel are opposite, forming a water channel structure in the form of countercurrent heat exchange, thereby improving the heat exchange efficiency of the cooling water channel and making the temperature distribution more uniform; the inner shell 13 and the outer shell 14 adopt an integrated structure with integrated end covers, and there is no need to use stir friction welding to fix and seal the inner and outer shells during assembly. The number of parts required for assembly is small, the assembly steps are small, and the reliability is higher. At the same time, the raw material cost and assembly cost of the motor casing can be reduced.

[0071] In the embodiment of the present disclosure, the water inlet and the water outlet are arranged at the end of the housing 1 away from the output end. In some embodiments, at the end of the housing 1 away from the output end, the water inlet and the water outlet are arranged on opposite sides, which is conducive to reducing the radial dimension of the housing 1 and improving the space utilization of the end of the housing 1 away from the output end.

[0072] In a second aspect, an embodiment of the present disclosure provides a drive system, which includes a reducer and at least one motor, wherein the reducer includes an output shaft and at least one input shaft, and the input shaft is coupled to the motor in a one-to-one correspondence; the motor is the motor described in the first aspect of the embodiment of the present disclosure.

[0073] Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted only in a general illustrative sense and not for limiting purposes. In some instances, it will be apparent to those skilled in the art that, unless otherwise expressly noted, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments. Therefore, those skilled in the art will appreciate that various changes in form and detail may be made without departing from the scope of the present disclosure as set forth in the appended claims.

Claims

1. A motor, comprising a housing, a stator, a rotor, and a stator winding arranged on the stator, wherein the stator and the rotor are arranged inside the housing, and the stator is fixedly connected to the housing, characterized in that: The stator winding is wound by flat wire.

2. The motor according to claim 1, characterized in that An output through hole is provided at the first end of the casing, and the driving shaft of the motor extends to the outside of the casing through the output through hole; a supporting groove is provided on the side of the output through hole facing the inside of the casing, and the stator is fitted in the supporting groove and fixedly connected to the casing.

3. The motor according to claim 2, characterized in that The motor further comprises a support member arranged on a side of the stator away from the support groove, wherein the support member is fixedly connected to the housing to limit the stator in the support groove.

4. The motor according to claim 3, characterized in that The support member includes a first annular portion and a second annular portion extending from the first annular portion; the inner diameter of the inner hole of the first annular portion is smaller than the outer diameter of the stator, and the inner diameter of the inner hole of the second annular portion matches the outer diameter of the stator; the support member is fixedly connected to the casing, and the first annular portion is located on a side of the second annular portion away from the support groove, so that the stator is limited in the support groove and the inner hole of the second annular portion.

5. The motor according to claim 4, characterized in that The second annular portion is provided with a notch along the axial direction for accommodating stator outgoing wires.

6. The motor according to claim 4, characterized in that The motor further includes a carbon brush assembly, which is disposed on a side of the first annular portion facing away from the stator.

7. The motor according to claim 2, characterized in that At least one fixing through hole is provided on the stator, and a bolt passes through the fixing through hole and is connected to the casing to fix the stator in the supporting groove.

8. The motor according to claim 2, characterized in that The rotor is sleeved on the driving shaft and is arranged in the inner hole of the stator; the rotor exceeds the stator by a first length in a direction close to the output through hole and exceeds the stator by a second length in a direction away from the output through hole.

9. The motor according to claim 2, characterized in that The motor further comprises magnetic steels, and the magnetic steels are arranged in a double V shape.

10. The electric machine according to any one of claims 2 to 9, characterized in that A junction box is provided at the second end of the housing, and the stator outgoing wires are connected to the high-voltage cable through the junction box.

11. The motor according to claim 10, characterized in that The stator outgoing wire includes a stator outgoing wire copper bar, which is electrically connected to the stator winding; the stator outgoing wire copper bar is also electrically connected to an outgoing wire screw, the outgoing wire screw is electrically connected to a wiring terminal, and the wiring terminal is electrically connected to the high-voltage cable.

12. The motor according to claim 11, characterized in that The wiring terminal comprises an L-shaped wiring terminal or a soft copper busbar.

13. The motor according to claim 11, characterized in that The motor further comprises an insulating sleeve arranged between the housing and the lead screw, a first sealing ring is arranged between the insulating sleeve and the housing, and a second sealing ring is arranged between the insulating sleeve and the lead screw.

14. The electric machine according to any one of claims 2 to 9, characterized in that The housing comprises an inner housing and an outer housing, wherein the inner housing is sleeved in the outer housing; The inner shell comprises an inner cylindrical portion and an inner end cover portion arranged at one end of the inner cylindrical portion, wherein the inner cylindrical portion and the inner end cover portion are an integral structure; The outer shell comprises an outer cylindrical portion and an outer end cover portion arranged at one end of the outer cylindrical portion, wherein the outer cylindrical portion and the outer end cover portion are an integral structure; The inner end cover portion and the outer end cover portion are located at two opposite ends of the housing.

15. The motor according to claim 14, characterized in that A cooling water channel is arranged between the outer wall of the inner shell and the inner wall of the outer shell; the cooling water channel comprises a first water channel connected to the water inlet and a second water channel connected to the water outlet, and the first water channel and the second water channel are alternately arranged in the axial direction.

16. The motor according to claim 15, characterized in that The water inlet and the water outlet are arranged at one end of the housing away from the output through hole.

17. The electric machine according to claim 16, characterized in that The water inlet and the water outlet are arranged on two opposite sides at one end of the housing away from the output through hole.

18. A drive system, characterized in that: The drive system includes a reducer and at least one motor, the reducer includes an output shaft and at least one input shaft, and the input shaft is coupled to the motor in a one-to-one correspondence; the motor is a motor according to any one of claims 1 to 17.

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