Permanent Magnet Assisted Switched Reluctance Motor

Abstract

The present invention relates to the technical field of motors, and discloses a permanent magnet assisted switched reluctance motor, comprising a housing and a stator and a rotor arranged in the housing, wherein the stator is provided with a winding, the rotor is connected to a rotating shaft, and the rotating shaft extends outside the housing; further comprising a rotor bracket, wherein the rotor and the rotating shaft are connected through the rotor bracket; further comprising a cooling oil passage, wherein the cooling oil passage extends from the outside of the housing through the rotor bracket to the inside of the housing, wherein a bracket passage and a cooling oil nozzle are formed in the rotor bracket, so that the cooling oil can follow the rotation movement of the rotor bracket to obtain power and then be sprayed out; a blocking member is arranged in the bracket passage, so that when the rotor bracket rotates, the blocking member can be displaced with the bracket passage to open the bracket passage, and when the rotor bracket stops rotating, the blocking member can face the bracket passage to close the bracket passage. The present invention discloses a permanent magnet assisted switched reluctance motor, which can realize that the passage of the cooling oil changes according to the rotation state of the motor, thereby realizing efficient cooling.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a permanent magnet assisted switched reluctance motor. Background Art

[0002] The switched reluctance motor is a speed-regulating motor whose working principle is based on the principle of minimum magnetic resistance. When the stator winding is energized in a specific order, the magnetic field generated causes the rotor to rotate toward the position with the minimum magnetic resistance. By continuously changing the phase sequence of the power supply, the rotor can continue to rotate. The switched reluctance motor has many advantages, such as simple and sturdy structure, low cost; large starting torque and small starting current; wide speed regulation range, which can achieve efficient operation in a wide speed range; high reliability, can adapt to harsh working environments, and has broad application prospects in many fields such as industrial production and electric vehicles.

[0003] The switched reluctance motor is mainly composed of a stator and a rotor. The stator has a concentrated winding, and the rotor is made of laminated silicon steel sheets. The rotor of a traditional switched reluctance motor has neither windings nor permanent magnets. In the application and development of switched reluctance motors, permanent magnet-assisted switched reluctance motors have emerged. On the basis of traditional switched reluctance motors, permanent magnet assistance is added. Generally, permanent magnets are set on the basis of the stator and its windings, and excitation flux is provided by excitation coils and auxiliary permanent magnets. The excitation mode becomes a hybrid excitation of electric excitation and permanent magnets, which can increase the electromagnetic torque and improve the efficiency of the motor without changing the current.

[0004] Although the efficiency of the switched reluctance motor is improved by permanent magnet assistance, a new source of heat loss is generated, that is, in addition to the heating of the windings and the copper loss of the electromagnet, the heating of the permanent magnets is also increased. Therefore, the reasonable allocation of windings and permanent magnets and the structure that assists the heat dissipation of the two are particularly important.

[0005] In order to solve this technical defect, the prior art proposes to set up a cooling oil passage in the switched reluctance motor so that the cooling oil rotates with the rotor and then sprays the cooling oil on the heating area, thereby increasing the contact area between the cooling oil and the heating area, thereby improving the heat dissipation efficiency.

[0006] But new defects emerged:

[0007] Generally, cooling oil circulates between the cooling oil tank and the motor through the power of a pump. For ease of control, the pump is usually set to start and close according to the start and stop of the motor, or the pump is turned off after the motor stops completely. However, it is impossible to completely match the rotation state of the cooling oil and the motor, so there is room for improvement in cooling efficiency. Summary of the invention

[0008] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the applicant has proposed an idea that when the motor is rotating, the cooling oil passage is kept open, and when the motor stops rotating, the cooling oil passage is closed. During the process of closing the cooling oil passage, the pressure in the cooling oil pipeline will increase, and the speed of the pump can be adjusted according to the pressure until it stops completely, so that the spraying state and spraying amount of the cooling oil are as close as possible to the rotation state of the motor, thereby improving the cooling efficiency;

[0009] Based on the above ideas, the purpose of the present invention is to provide a permanent magnet assisted switched reluctance motor, which can change the passage of cooling oil according to the rotation state of the motor, thereby achieving efficient cooling.

[0010] The permanent magnet assisted switched reluctance motor proposed in the present invention comprises a housing and a stator and a rotor arranged in the housing. The stator has a plurality of salient poles, windings are arranged on the salient poles, permanent magnets are arranged between the salient poles, and the rotor also has a plurality of salient poles. When the windings are energized, the magnetic field generated and the magnetic field of the permanent magnets can act on the rotor to rotate the rotor. The rotor is connected to a rotating shaft, and the rotating shaft extends outside the housing.

[0011] It also includes a rotor bracket, through which the rotor and the rotating shaft are connected, so that the rotating shaft and the rotor bracket can rotate with the rotor;

[0012] It also includes a cooling oil passage, which extends from the outside of the casing through the rotor bracket to the inside of the casing. A bracket passage and a cooling oil nozzle are formed in the rotor bracket, so that the cooling oil can be ejected after obtaining power by following the rotation movement of the rotor bracket, so that the cooling oil is ejected in a spray state.

[0013] Different from the traditional structure, a blocking piece is arranged in the support passage of the motor, so that when the rotor support rotates, the blocking piece can be displaced with the support passage to open the support passage, and when the rotor support stops rotating, the blocking piece can face the support passage to close the support passage.

[0014] The power for the blocking member to move is from the rotor bracket, that is, when the rotor bracket rotates in one direction, the blocking member deviates from the bracket passage under the action of centrifugal force, so that the bracket passage is opened; when the rotor bracket stops rotating, the blocking member is reset to close the bracket passage;

[0015] It should be noted that in order to avoid affecting the direction of the magnetic lines of force, the rotor bracket and the sealing member are both made of non-magnetic materials.

[0016] In some examples of the present invention, the blocking member is a sphere, a cylindrical cavity is arranged on the rotor support and intersecting with the support passage, and the sphere is placed in the cylindrical cavity, so that when the rotor support rotates, the sphere can be displaced to the end of the cylindrical cavity under the action of centrifugal force to open the support passage, and when the rotor support stops rotating, the sphere returns to the middle of the cylindrical cavity to close the cooling oil passage;

[0017] The purpose of such arrangement is that: since the cylindrical cavity and the stent passage are arranged crosswise, when the sphere is located at the intersection of the two, the stent passage can be closed, and when the sphere deviates from the intersection of the two and is located at the end of the cylindrical cavity, the stent passage can be opened;

[0018] The purpose of setting the blocking member as a sphere is to have a smaller friction force between the sphere and the cavity wall of the cylindrical cavity, thereby ensuring that the sphere can be displaced to the end of the cylindrical cavity under a smaller force as much as possible.

[0019] In some examples of the present invention, the cylindrical cavity extends along the rotation direction of the rotor bracket, and a slope is formed from the end to the middle of the cylindrical cavity, so that when the sphere is not affected by centrifugal force, it can be reset to the middle of the cylindrical cavity under the action of gravity.

[0020] “The cylindrical cavity extends along the rotation direction of the rotor support” is interpreted as: the cylindrical cavity follows the rotor support to move at a certain angular displacement, and the cylindrical cavity extends along the angular displacement. For example, in some embodiments, the rotor support is cylindrical, and when it rotates, it drives the cylindrical cavity to rotate along a circle, and the cylindrical cavity extends along the circle;

[0021] The reason for such arrangement is that when the sphere is displaced by centrifugal force, the extension direction of the cylindrical cavity needs to be consistent with the displacement direction of the sphere.

[0022] At this time, the cylindrical cavity needs to meet the following conditions: the cylindrical cavity basically extends on a plane perpendicular to the central axis of the rotor support;

[0023] The purpose of setting up the "slope from the end to the middle of the cylindrical cavity" is that the slope makes the two ends of the cylindrical cavity high and the middle low, and the middle of the cylindrical cavity intersects with the bracket passage. Therefore, when the rotor bracket is not rotating, the sphere can be displaced to the middle of the cylindrical cavity with the help of gravity to close the bracket passage.

[0024] In some examples of the invention, the diameter of the sphere is larger than the inner diameter of the stent passage.

[0025] The purpose of such arrangement is to prevent the ball from entering the passage of the bracket.

[0026] In some examples of the present invention, the rotor support includes a cylindrical member and an annular member, the rotating shaft passes through the cylindrical member and is connected to the cylindrical member, and the rotor and the annular member are both placed outside the cylindrical member.

[0027] The purpose of such arrangement is to distribute the cooling oil passages on the rotating shaft and the rotor support, so that the cooling oil passages can be introduced from the outside of the motor into the inside of the motor through the rotating shaft, and then guided through the cylindrical member and sprayed out from the annular member;

[0028] The rotor can be placed in the middle and the annular parts can be distributed at the upper and lower ends of the rotor, so that the cooling oil can be sprayed evenly to the heating components.

[0029] In some examples of the present invention, the cooling oil passage further includes a shaft passage opened on the shaft, and the shaft passage is connected to the bracket passage;

[0030] The support passage includes a first support passage opened on the columnar member and a second support passage opened on the annular member, one end of the first support passage is connected to the shaft passage, and the other end is connected to the second support passage;

[0031] In some examples of the present invention, the second stent passage extends in the radial direction of the annular member, and the cylindrical cavity is opened in the annular member and extends in the circumferential direction of the annular member.

[0032] The purpose of such arrangement is: for the convenience of manufacturing, the cylindrical cavity and the sealing member are installed on the annular member, and the second bracket passage extends radially along the annular member, so that the cooling oil can be directly sprayed onto the winding and the permanent magnet, thereby improving the cooling efficiency.

[0033] In some examples of the present invention, the upper end of the columnar member is recessed to form a groove, an annular groove is formed between the groove and the rotating shaft, a balancing body is arranged in the annular groove, the balancing body is umbrella-shaped, and is sleeved on the rotating shaft, with gaps between the rotating shaft and the bottom surface of the annular groove, and an elastic body is arranged in the gap.

[0034] The purpose of such arrangement is that: in some embodiments, the annular member is provided with a plurality of second bracket passages, which are distributed along the circumference of the annular member, and a plurality of corresponding blocking members are also provided. However, during the rotation of the rotor, each blocking member cannot be displaced to the expected position at the same time, which will cause the rotor bracket to be unbalanced, and in the long run, it is easy to cause damage to the shaft or the bearing;

[0035] Therefore, a balancing body is provided, and the balancing body and the columnar member are elastically connected with each other and a gap exists between the two. Therefore, when the rotor bracket is unbalanced, the balancing body can lag in rotation to compensate for the imbalance, so as to realize balanced operation of the combination of the rotating shaft, the rotor bracket and the rotor.

[0036] In some examples of the present invention, the balancing body is concave inwardly, so that the outer side surface of the balancing body is a curved surface concave toward the balancing body;

[0037] The purpose of such arrangement is to make the balancing body as close to the central axis of the assembly as possible and follow the movement of the assembly, that is, to reduce the resistance suffered by the balancing body and to exert the balancing effect as much as possible.

[0038] In some examples of the present invention, a stopper is provided on the rotating shaft at the upper end of the balancing body, and the stopper is used to prevent the balancing body from axial movement.

[0039] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 is a cross-sectional view of a permanent magnet assisted switched reluctance motor according to an embodiment of the present invention;

[0042] Figure 2 is a front view of the ring member in the embodiment of the present invention;

[0043] Figure 3 A bottom view of the upper annular disk in an embodiment of the present invention;

[0044] Figure 4 A top view of the lower annular disk in an embodiment of the present invention;

[0045] Figure 5 is a top view of the annular member in an embodiment of the present invention;

[0046] Figure 6 In the embodiment of the present invention Figure 5 Sectional view at AA;

[0047] Figure 7 It is a front view of the balancing body in the embodiment of the present invention.

[0048] Description of reference numerals:

[0049] Casing 1, side casing 11, cooling oil outlet 111, upper end cover 12, lower end cover 13;

[0050] Stator 2, winding 21;

[0051] Rotor 3;

[0052] Rotating shaft 4, rotating shaft passage 41, first annular groove 42, annular step 43, stopper 44;

[0053] Rotor support 5, columnar member 51, first support passage 511, annular groove 512, second annular groove 513, annular member 52, columnar cavity 521, second support passage 522, upper annular disk 523, lower annular disk 524, special-shaped through hole 525, slope 526, cooling oil nozzle 527;

[0054] Blocking piece 6;

[0055] Balance body 7, inner edge step 71;

[0056] Elastic body 8, first rubber ring 81, second rubber ring 82;

[0057] Bearing 9. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0060] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0062] Reference below Figure 1 to Figure 7 The figure shows a description of a permanent magnet assisted switched reluctance motor provided by an embodiment of the present invention.

[0063] Please see attached Figure 1 , is a cross-sectional view of a permanent magnet assisted switched reluctance motor, which includes a housing 1 and a stator 2 and a rotor 3 arranged in the housing 1. The stator 2 has a plurality of salient poles (not shown in the figure), the salient poles are provided with windings 21, and permanent magnets (not shown in the figure) are arranged between the salient poles. The rotor 3 also has a plurality of salient poles (not shown in the figure). When the winding 21 is energized, the magnetic field generated and the magnetic field of the permanent magnet can act on the rotor 3 to rotate the rotor 3. The rotor 3 is connected to a rotating shaft 4, and the rotating shaft 4 extends outside the housing 1;

[0064] Among them, the casing 1 includes an annular side casing 11 and an upper end cover 12 and a lower end cover 13. The stator 2 is annular and fixed inside the side casing 11. The salient poles of the stator 2 point to the center of the casing 1. The rotor 3 is also annular, and the salient poles of the rotor 3 point to the stator 2. The rotating shaft 4 is rotatably connected to the upper end cover 12 and the lower end cover 13 through bearings 9, so that the rotational motion generated by the rotor 3 is transmitted to the outside of the casing 1 through the rotating shaft 4.

[0065] Please continue to see the attached Figure 1 The motor further includes a rotor bracket 5, through which the rotor 3 is connected to the rotating shaft 4, so that the rotating shaft 4 and the rotor bracket 5 can rotate with the rotor 3; specifically, the rotor bracket 5 is tightly fitted on the rotating shaft 4, and the rotor 3 is welded to the rotor bracket 5.

[0066] Please continue to see the attached Figure 1The motor further includes a cooling oil passage, which extends from the outside of the housing 1 through the rotor bracket 5 to the inside of the housing 1. A bracket passage and a cooling oil nozzle 527 are formed in the rotor bracket 5, so that the cooling oil can be sprayed out after obtaining power by following the rotation movement of the rotor bracket 5, so that the cooling oil is sprayed out in a spraying state;

[0067] Please continue to see the attached Figure 1 The casing 1 is provided with a cooling oil outlet 111, which is specifically formed on the side casing 11. The cooling oil outlet 111 is used to discharge the cooling oil in the casing 1 so as to circulate the cooling oil.

[0068] Please continue to see the attached Figure 1 The blocking member 6 is arranged in the support passage of the motor, so that when the rotor support 5 rotates, the blocking member 6 can be displaced from the support passage to open the support passage, and when the rotor support 5 stops rotating, the blocking member 6 can be directly opposite to the support passage to close the support passage; the power for the displacement of the blocking member 6 comes from the rotor support 5, that is, when the rotor support 5 rotates in one direction, the blocking member 6 deviates from the support passage under the action of centrifugal force to open the support passage, and when the rotor support 5 stops rotating, the blocking member 6 is reset to close the support passage;

[0069] Please continue to see the attached Figure 1 The sealing member 6 is a sphere, and a cylindrical cavity 521 is arranged on the rotor bracket 5 to intersect with the bracket passage. The sphere is placed in the cylindrical cavity 521, so that when the rotor bracket 5 rotates, the sphere can be displaced to the end of the cylindrical cavity 521 under the action of centrifugal force to open the bracket passage. When the rotor bracket 5 stops rotating, the sphere is reset to the middle of the cylindrical cavity 521 to close the cooling oil passage.

[0070] Please continue to see the attached Figure 1 The rotor support 5 includes a cylindrical member 51 and an annular member 52. The rotating shaft 4 passes through the cylindrical member 51 and is connected to the cylindrical member 51. The rotor 3 and the annular member 52 are both placed outside the cylindrical member 51.

[0071] Specifically, there are two annular members 52, which are distributed at the upper and lower parts of the cylindrical member 51, and the rotor 3 is placed between the two annular members 52. The cylindrical member 51, the annular member 52, and the rotor 3 are all coaxial with the rotating shaft 4, wherein the cylindrical member 51 is connected to the rotating shaft 4 by a tight fit, and the annular member 52 and the rotor 3 are both welded to the cylindrical member 51;

[0072] Correspondingly, the cooling oil passage is distributed on the rotating shaft 4 and the rotor support 5 . The cooling oil passage can be introduced from the outside of the motor into the inside of the motor by the rotating shaft 4 , and then guided by the columnar member 51 and sprayed out at the annular member 52 .

[0073] Please continue to see the attached Figure 1 , a cylindrical cavity 521 is opened on the annular member 52 .

[0074] Please continue to see the attached Figure 1 The support passage includes a first support passage 511 opened on the columnar member 51 and a second support passage 522 opened on the annular member 52. The output end of the first support passage 511 has two ends, which are respectively connected to the second support passages 522 on the two annular members 52.

[0075] Please see attached Figure 2 , is a front view of the ring member 52. In order to facilitate the processing of the cylindrical cavity 521 and the insertion of the sphere on the ring member 52, the ring member 52 includes an upper ring disk 523 and a lower ring disk 524. The upper ring disk 523 and the lower ring disk 524 are connected by welding.

[0076] Please see attached Figure 3 ~Attached Figure 4 , attached Figure 3 is a bottom view of the upper annular disk 523, Figure 4 : is a top view of the lower annular disk 524. There are a plurality of second bracket passages 522 extending along the radial direction F of the annular member 52 and evenly distributed along the circumferential direction G of the annular member 52. The cylindrical cavity 521 is opened in the annular member 52 and extends along the circumferential direction G of the annular member 52, that is, along the rotation direction of the annular member 52, and corresponds to the second bracket passages 522 one by one.

[0077] For details, please refer to the attached Figure 3 ~Attached Figure 4 The second bracket passage 522 is divided into two halves, which are respectively opened on the upper annular disk 523 and the lower annular disk 524. When the upper annular disk 523 and the lower annular disk 524 are closed, the upper annular disk 523 and the lower annular disk 524 can form a cylindrical cavity 521. Correspondingly, the cylindrical cavity 521 is also divided into two halves by the upper annular disk 523 and the lower annular disk 524. When the two are closed, the cylindrical cavity 521 can be formed.

[0078] Please continue to see the attached Figure 3 ~Attached Figure 4 A special-shaped through hole 525 is also provided at a position on the upper annular disk 523 corresponding to the second bracket passage 522 and the cylindrical cavity 521, and the special-shaped through hole 525 is used to facilitate welding.

[0079] Please see attached Figure 5 ~Attached Figure 6 , attached Figure 5 is a top view of the ring member 52, Figure 6 The cross-sectional view at AA shows that a slope 526 is formed from the end to the middle of the cylindrical cavity 521, so that the sphere can be reset to the middle of the cylindrical cavity 521 under the action of gravity when it is not affected by centrifugal force;

[0080] Specifically, the slope surface 526 is a curved surface, and the slope surfaces 526 at both ends are smoothly connected, and both ends of the cylindrical cavity 521 are spherical wall surfaces adapted to the sphere.

[0081] Please continue to see the attached Figure 6 The diameter R of the sphere is larger than the inner diameter r of the stent passage, which can prevent the sphere from entering the stent passage.

[0082] Please continue to see the attached Figure 1 The cooling oil passage also includes a shaft passage 41 opened on the shaft 4, and the shaft passage 41 is connected to the bracket passage; specifically, the shaft passage 41 is opened along the axial direction of the shaft 4, extends from one end of the shaft 4 to the middle of the shaft 4, and is connected to the first bracket passage 511.

[0083] Please continue to see the attached Figure 1 The upper end of the columnar member 51 is concave to form a groove, which is a cylindrical groove. An annular groove 512 is formed between the groove and the rotating shaft 4. A balancing body 7 is arranged in the annular groove 512. The balancing body 7 is umbrella-shaped and sleeved on the rotating shaft 4. There are gaps between the balancing body 7 and the rotating shaft 4 and the bottom surface of the annular groove 512, and an elastic body 8 is arranged in the gap.

[0084] Specifically, the elastic body 8 is a rubber ring, including a first rubber ring 81 and a second rubber ring 82. The first rubber ring 81 is placed between the balancing body 7 and the rotating shaft 4, and the second rubber ring 82 is placed on the bottom of the annular groove 512. In order to fix the rubber ring, a first annular groove 42 for installing the first rubber ring 81 is opened on the rotating shaft 4, and a second annular groove 513 for installing the second rubber ring 82 is opened on the bottom of the annular groove 512.

[0085] Please continue to see the attached Figure 1 In order to make the balancing body 7 move within the desired range, an annular step 43 is formed on the rotating shaft 4, and an inner edge step 71 is correspondingly formed on the inner wall of the balancing body 7. The inner edge step 71 corresponds to the annular step 43, thereby forming a relative restriction on the movement of the balancing body 7.

[0086] Please continue to see the attached Figure 7 , is a front view of the balancing body 7. The balancing body 7 is concave inwardly, so that the outer side surface of the balancing body 7 is a curved surface concave toward the balancing body 7; thereby, the balancing body 7 can be as close to the central axis of the assembly as possible and follow the movement of the assembly, that is, the resistance suffered by the balancing body 7 is reduced and the balancing effect is exerted as much as possible.

[0087] Please continue to see the attached Figure 1 At the upper end of the balancing body 7, a stopper 44 is provided on the rotating shaft 4. The stopper 44 is an annular body, which is sleeved on the rotating shaft 4 and has a gap with the upper end of the balancing body 7 to prevent the balancing body 7 from axial movement.

[0088] Other structures according to the embodiments of the present invention, such as the stator, the rotor, the winding, etc. and operations are known to those skilled in the art and will not be described in detail here.

[0089] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0090] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A permanent magnet assisted switched reluctance motor, comprising a housing and a stator and a rotor arranged in the housing, wherein the stator is provided with a winding, and when the winding is energized, the magnetic field generated can act on the rotor to rotate the rotor, and the rotor is connected to a rotating shaft, and the rotating shaft extends outside the housing; It also includes a rotor bracket, through which the rotor and the rotating shaft are connected, so that the rotating shaft and the rotor bracket can rotate with the rotor; Features: It also includes a cooling oil passage, which extends from the outside of the housing through the rotor bracket to the inside of the housing, and a bracket passage and a cooling oil nozzle are formed in the rotor bracket, so that the cooling oil can follow the rotation movement of the rotor bracket to obtain power and then be sprayed out; A blocking piece is arranged in the support passage, so that when the rotor support rotates, the blocking piece can be displaced from the support passage to open the support passage, and when the rotor support stops rotating, the blocking piece can be aligned with the support passage to close the support passage; The blocking member is a sphere, and a cylindrical cavity is arranged on the rotor support and intersecting with the support passage. The sphere is placed in the cylindrical cavity, so that when the rotor support rotates, the sphere can be displaced to the end of the cylindrical cavity under the action of centrifugal force to open the support passage. When the rotor support stops rotating, the sphere returns to the middle of the cylindrical cavity to close the cooling oil passage. The cylindrical cavity extends along the rotation direction of the rotor bracket, and a slope is formed from the end to the middle of the cylindrical cavity, so that the sphere can be reset to the middle of the cylindrical cavity under the action of gravity when not affected by centrifugal force.

2. The permanent magnet assisted switched reluctance motor according to claim 1, characterized in that: The diameter of the sphere is larger than the inner diameter of the stent passage.

3. The permanent magnet assisted switched reluctance motor according to claim 1 or 2, characterized in that: The rotor support comprises a cylindrical component and an annular component. The rotating shaft passes through the cylindrical component and is connected to the cylindrical component. The rotor and the annular component are both arranged outside the cylindrical component.

4. The permanent magnet assisted switched reluctance motor according to claim 3, characterized in that: The cooling oil passage also includes a shaft passage opened on the shaft, and the shaft passage is connected to the bracket passage; The support passage comprises a first support passage opened on the columnar member and a second support passage opened on the annular member. One end of the first support passage is connected to the rotating shaft passage, and the other end is connected to the second support passage.

5. The permanent magnet assisted switched reluctance motor according to claim 4, characterized in that: The second support passage extends in the radial direction of the annular member, and the cylindrical cavity is opened in the annular member and extends in the circumferential direction of the annular member.

6. The permanent magnet assisted switched reluctance motor according to claim 5, characterized in that: The upper end of the columnar member is recessed to form a groove, an annular groove is formed between the groove and the rotating shaft, a balancing body is arranged in the annular groove, the balancing body is umbrella-shaped, and is sleeved on the rotating shaft, with gaps between the balancing body and the rotating shaft and the bottom surface of the annular groove, and an elastic body is arranged in the gap.

7. The permanent magnet assisted switched reluctance motor according to claim 6, characterized in that: The balancing body is concave inwardly, so that the outer side surface of the balancing body is a curved surface concave toward the balancing body.

8. The permanent magnet assisted switched reluctance motor according to claim 6, characterized in that: At the upper end of the balancing body, a stopper is arranged on the rotating shaft, and the stopper is used to prevent the balancing body from axial movement.

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