CN216216392U - Monitoring assembly and switched reluctance motor - Google Patents

Abstract

The embodiment of the utility model discloses a monitoring assembly and a switched reluctance motor, and relates to the field of driving equipment. The monitoring assembly comprises a circuit board, a temperature measuring unit and a plurality of position monitoring unit groups. The circuit board can be used for abutting the temperature measuring unit with one of the coils. The temperature measuring unit only abuts against the coil, and other structures are not needed between the temperature measuring unit and the coil for auxiliary fixation, so that when the circuit board is detached from the switched reluctance motor, the temperature measuring unit is separated from the coil, the temperature measuring unit is prevented from being fixedly connected with the coil, and when the circuit board is detached, a lead between the temperature measuring unit and the temperature measuring unit needs to be disconnected, and the disassembly and assembly of the monitoring assembly are simplified. Further, the quantity of position monitoring unit group is a plurality of, so can improve the pulse signal quantity that the rotatory a week of rotor subassembly produced, further promotes to the control accuracy of rotor subassembly, can greatly reduced switched reluctance motor's torque ripple at switched reluctance motor low-speed stage, reduces switched reluctance motor vibration.

Description

Monitoring assembly and switched reluctance motor

Technical Field

The utility model relates to the field of driving equipment, in particular to a monitoring assembly and a switched reluctance motor.

Background

A monitoring assembly is often arranged in the existing switched reluctance motor and used for monitoring the coil temperature of the switched reluctance motor and the rotating position of a rotor assembly. Wherein, the temperature unit in the monitoring subassembly generally adopts the mode of consolidation and the coil connection that awaits measuring the temperature, consequently, need break off the lead wire of connecting on the temperature unit when dismantling the monitoring subassembly from switched reluctance motor, can accomplish the dismantlement, and the dismantlement process is loaded down with trivial details relatively. And the precision of the position monitoring unit in the monitoring assembly for monitoring the rotating position of the rotor assembly is low, and the torque pulsation and the vibration are large when the switched reluctance motor is at a low speed.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a monitoring subassembly and switched reluctance motor, aim at solving the current switched reluctance motor's monitoring subassembly and dismantle loaded down with trivial details, the lower technical problem of precision of the rotational position of monitoring rotor subassembly.

In order to solve the technical problems, the first technical scheme adopted by the utility model is as follows:

the monitoring assembly is used for a switched reluctance motor and comprises a circuit board, a temperature measuring unit and a plurality of groups of position monitoring unit groups, wherein the temperature measuring unit is electrically connected with the circuit board, the circuit board can enable the temperature measuring unit to be abutted against one coil of the switched reluctance motor, each position monitoring unit comprises two position monitoring units, the position monitoring units are electrically connected with the circuit board, and the position monitoring units are used for monitoring the rotating position of a rotor assembly of the switched reluctance motor.

In some embodiments of the monitoring assembly, one of the two position monitoring units in the same group of position monitoring units is located in a second plane passing through a centerline of one of the adjacent stator poles of the switched reluctance motor and a rotational axis of the rotor assembly, and the other of the two position monitoring units in the same group of position monitoring units is located on a plane of symmetry between the adjacent stator poles.

In some embodiments of the monitoring assembly, the monitoring assembly further comprises a connection terminal base, the connection terminal base is electrically connected with the circuit board and is used for electrically connecting the circuit board with an external circuit.

In some embodiments of the monitoring assembly, the terminal block is a pin connector capable of forming a parallel outlet with the circuit board.

In some embodiments of the monitoring assembly, the temperature measuring unit is an NTC thermistor.

In some embodiments of the monitoring assembly, the position monitoring unit is an optoelectronic position sensor.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a switched reluctance machine comprising:

a housing;

a rotor assembly rotatably coupled to the housing; and

the stator mechanism is arranged on the shell and comprises a plurality of stator poles, each stator pole surrounds the rotor assembly and is distributed, the stator mechanism further comprises a plurality of coils, each coil is arranged on each stator pole in a one-to-one correspondence mode through an insulating piece, the insulating pieces are used for electrically isolating the stator poles from the coils, and the stator mechanism further comprises the monitoring assembly.

In some embodiments of the switched reluctance motor, the rotor assembly includes a rotating shaft and rotor poles annularly arranged on the rotating shaft, the rotor assembly further includes a plurality of monitoring portions, each of the monitoring portions corresponds to each of the rotor poles one by one and is arranged on the rotating shaft, each of the position monitoring units is arranged around the rotating shaft, the monitoring portions can sequentially pass through each of the position monitoring units along with the rotation of the rotating shaft, the monitoring portions have a first edge and a second edge which are arranged in an opposite manner along a rotation path of the monitoring portions, a first plane passing through a center line of one of the adjacent rotor poles and a rotation axis thereof is tangent to the first edge, and the second edge is located on a symmetry plane between the adjacent rotor poles.

In some embodiments of the switched reluctance motor, the stator mechanism further includes a body, each of the stator poles is accommodated in a space enclosed by the body and is disposed in the body, and the circuit board is disposed in the body through at least one of the insulating members, so as to abut the temperature measuring unit against one of the coils.

In some embodiments of the switched reluctance motor, the circuit board is provided with a jack, and the jack is used for being plugged with the insulating part connected with the circuit board.

The embodiment of the utility model has the following beneficial effects:

the monitoring component of the scheme is applied to and equipped in the switched reluctance motor, so that the switched reluctance motor has excellent monitoring efficiency, the disassembly process of the monitoring component can be simplified, and the precision of the rotation position of the monitoring rotor component is improved. Specifically, the monitoring assembly comprises a circuit board, a temperature measuring unit and a plurality of position monitoring unit groups. The circuit board can be with temperature measurement unit and one of them coil butt for the temperature of this coil is monitored, in order to realize switched reluctance motor's excess temperature protection. The temperature measuring unit is only abutted to the coil, and other structures are not needed between the temperature measuring unit and the coil for assisting in fixing, so that when the circuit board is detached from the switched reluctance motor, the temperature measuring unit is separated from the coil, the temperature measuring unit is prevented from being fixedly connected to the coil, and when the circuit board is detached, a lead between the temperature measuring unit and the temperature measuring unit is required to be disconnected, and then the dismounting and mounting of the monitoring assembly are simplified. Further, the quantity of position monitoring unit group is a plurality of, so can improve the pulse signal quantity that the rotatory a week of rotor subassembly produced, further promotes to the control accuracy of rotor subassembly, can greatly reduced switched reluctance motor's torque ripple at switched reluctance motor low-speed stage, reduces switched reluctance motor vibration.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Wherein:

FIG. 1 is an axial view of a switched reluctance machine in one embodiment;

fig. 2 is an exploded view of the switched reluctance motor shown in fig. 1;

FIG. 3 is a front view of a stator mechanism in the switched reluctance machine of FIG. 1;

FIG. 4 is a rear view of a stator mechanism in the switched reluctance motor of FIG. 1;

fig. 5 is an exploded view of a stator mechanism in the switched reluctance motor shown in fig. 1;

fig. 6 is an axial view of an insulator in the switched reluctance motor shown in fig. 1;

fig. 7 is an axial view of another perspective of an insulator in the switched reluctance machine of fig. 1;

fig. 8 is a schematic view illustrating an assembly between a stator pole and an insulator in the switched reluctance motor shown in fig. 1;

FIG. 9 is an enlarged view of part A of FIG. 8;

FIG. 10 is another schematic view showing the structure of a mounting projection in the example;

FIG. 11 is an axial view of a monitoring assembly in the switched reluctance motor of FIG. 1;

FIG. 12 is an axial view from another perspective of a monitoring assembly in the switched reluctance motor of FIG. 1;

fig. 13 is a diagram illustrating a positional relationship between a monitoring unit and a coil in the switched reluctance motor shown in fig. 1;

FIG. 14 is a diagram illustrating the positional relationship between the monitoring assembly and the stator poles in the switched reluctance motor;

fig. 15 is an axial view of a rotor assembly in the switched reluctance motor shown in fig. 1;

fig. 16 is an axial view of another perspective of a rotor assembly in the switched reluctance machine of fig. 1;

fig. 17 is a diagram illustrating a positional relationship between a monitoring part and a rotor pole in the switched reluctance motor shown in fig. 1;

fig. 18 is an axial view of a front end cap in the switched reluctance motor of fig. 1;

fig. 19 is an axial view of a rear end cap in the switched reluctance motor of fig. 1;

fig. 20 is a schematic view of another example clamping assembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the utility model is used, it is only for convenience of describing the present invention and simplifying the description, but it is not necessary to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, it should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

A monitoring assembly is often arranged in the existing switched reluctance motor and used for monitoring the coil temperature of the switched reluctance motor and the rotating position of a rotor assembly. Wherein, the temperature unit in the monitoring subassembly generally adopts the mode of consolidation and the coil connection that awaits measuring the temperature, consequently, need break off the lead wire of connecting on the temperature unit when dismantling the monitoring subassembly from switched reluctance motor, can accomplish the dismantlement, and the dismantlement process is loaded down with trivial details relatively. And the precision of the position monitoring unit in the monitoring assembly for monitoring the rotating position of the rotor assembly is low, and the torque pulsation and the vibration are large when the switched reluctance motor is at a low speed.

The present invention provides a switched reluctance motor to solve the above technical problems. Referring to fig. 1, 2, and 5 to 8, the switched reluctance motor includes a housing 10, a rotor assembly 20, and a stator mechanism 30. The rotor assembly 20 is rotatably connected to the housing 10, i.e., can be driven by the stator mechanism 30 to rotate relative to the housing 10. Further, a stator mechanism 30 is provided to the housing 10. The stator mechanism 30 includes a plurality of stator poles 31. The stator poles 31 are distributed around the rotor assembly 20, and the stator mechanism 30 further includes a plurality of coils 32, wherein the coils 32 are disposed on the stator poles 31 through insulators 33. In this embodiment, the number of the stator poles 31 is 8, and each stator pole 31 is two by two diametrically opposite coils 32 located on the same radial direction and connected to form one phase. It is understood that the number of stator poles 31 may also have other values in other embodiments. Further, the insulator 33 serves to electrically isolate the stator poles 31 from the coils 32. Referring to fig. 2 to 5 and fig. 11 to 14, the stator mechanism 30 further includes a monitoring assembly 35. The monitoring assembly 35 includes a circuit board 351, a temperature measuring unit 352 and a plurality of position monitoring unit sets. In this embodiment, the circuit board 351 is a PCB board, which ensures that the circuit board 351 has a certain rigidity. Further, the temperature measuring unit 352 is electrically connected to the circuit board 351. In this embodiment, the stator mechanism 30 further includes a body 34, and each stator pole 31 is accommodated in a space surrounded by the body 34 and disposed on the body 34. The circuit board 351 is disposed on the body 34, and can abut the temperature measuring unit 352 against one of the coils 32 for monitoring the temperature of the coil 32, so as to realize the over-temperature protection of the switched reluctance motor. In this embodiment, the temperature measuring unit 352 is welded to the circuit board 351 so as to enhance the connection stability between the temperature measuring unit 352 and the circuit board 351 and ensure the position accuracy of the temperature measuring unit 352, and then after the circuit board 351 is connected with the body 34, the temperature measuring unit 352 can be effectively abutted against the coil 32, thereby improving the monitoring accuracy. Furthermore, in the embodiment, the temperature measuring unit 352 only abuts against the coil 32, and no other structure is needed to assist and fix the temperature measuring unit 352 and the coil 32, so that when the circuit board 351 is detached from the body 34, the temperature measuring unit 352 is separated from the coil 32, the temperature measuring unit 352 is prevented from being fixed to the coil 32, and when the circuit board 351 is detached, the lead between the temperature measuring unit 352 and the temperature measuring unit 352 needs to be disconnected, thereby simplifying the detachment and installation of the circuit board 351. Further, the position monitoring unit group includes two position monitoring units 353, each position monitoring unit 353 is disposed around the rotation axis of the rotor assembly 20 and electrically connected to the circuit board 351, and the position monitoring unit 353 is configured to monitor the rotation position of the rotor assembly 20. In this manner, the position monitoring unit 353 cooperates with the rotor assembly 20 to generate different combinations of pulse signals for achieving position and speed control of the rotor assembly 20. Further, in this embodiment, the number of position monitoring unit group is a plurality of, so can improve the pulse signal quantity that rotor subassembly 20 rotatory a week produced, further promotes rotor subassembly 20's control accuracy, can greatly reduced switched reluctance motor's torque ripple at switched reluctance motor low-speed stage, reduces switched reluctance motor vibration.

In one embodiment, referring to fig. 1, 2, 5 to 8, the insulation member 33 is provided with an installation space 100. The stator pole 31 is inserted into the installation space 100. As shown in fig. 9, the stator pole 31 is provided with a mounting groove 200. The extending direction of the mounting groove 200 forms a certain angle with the inserting direction of the stator pole 31. The insulating member 33 is provided with a mounting protrusion 331, and the mounting protrusion 331 is located in the mounting space 100 and at least partially received in the mounting groove 200 to clamp the insulating member 33 with the stator pole 31. In this embodiment, one of the inserting directions is parallel to the direction indicated by the arrow X in fig. 5, and the extending direction of the mounting groove 200 is parallel to the direction indicated by the arrow Y in fig. 5. The switched reluctance motor of the scheme has excellent driving efficiency, and can reduce the complexity of the production process and improve the magnetic field precision. Specifically, the switched reluctance motor includes a housing 10, a rotor assembly 20, and a stator mechanism 30. The stator mechanism 30 comprises a plurality of stator poles 31, the coil 32 is arranged on the stator poles 31 through the insulating piece 33, and the coil 32 can be wound on the insulating piece 33 in advance and can be mounted on the stator poles 31 together with the insulating piece 33, so that the complexity of the production process of the switched reluctance motor can be reduced, the requirement on winding equipment is reduced, the production efficiency is improved, and the fault rate of turn-to-turn short circuit of the coil 32 is reduced. Furthermore, the insulating member 33 is provided with an installation space 100 for inserting the stator pole 31, the stator pole 31 is provided with an installation groove 200, the insulating member 33 is provided with an installation protrusion 331 at least partially accommodated in the installation groove 200, because the circumferential size of the stator pole 31 is not increased by the formation of the installation groove 200, the installation protrusion 331 can abut against the stator pole 31 only by deforming a small amount in the direction perpendicular to the insertion direction of the stator pole 31, and can slide into the installation groove 200 along with the movement of the insulating member 33, so that the phenomenon that the insulating member 33 deforms too much in the installation process with the stator pole 31 can be avoided, and the influence of the change of the winding position of the coil 32 on the accuracy of a subsequently formed magnetic field can be avoided.

In one embodiment, referring to fig. 8 and 9, the process of inserting the stator pole 31 into the installation space 100 includes at least an initial position and a final position, and the installation protrusion 331 is disposed on the insulating member 33 near the final position. The mounting protrusion 331 is disposed near the end position, so that before the stator pole 31 approaches the end position, the mounting protrusion 331 and the stator pole 31 are in a non-contact state, and further the insulator 33 cannot be driven to deform, thereby ensuring the stability of the winding position of the coil 32. Further, the installation protrusion 331 is disposed near the end position, so that the influence of the deformation of the installation protrusion 331 on the overall deformation of the insulating member 33 can be ensured to be as small as possible, the stability of the winding position of the coil 32 is further improved, and the accuracy of the formed magnetic field is ensured. As shown in fig. 9, in the present embodiment, the mounting protrusion 331 is located on the side of the insulator 33 close to the rotor assembly 20. The mounting protrusion 331 is semi-cylindrical, and has a diameter of 0.2 to 0.5mm and a length of 3 to 10 mm. It is understood that in other embodiments, the cross-section of the mounting protrusion 331 may also be triangular, trapezoidal, or other polygonal shape. In this embodiment, the coils 32 are wound by enameled wires, and have four groups, two in each group, and are respectively installed on two stator poles 31 opposite to each other in the radial direction, and are connected in series in the forward direction or the reverse direction to form one group.

In an embodiment, referring to fig. 9, the mounting groove 200 is opened on the stator pole 31 to form a stopping portion 311 on the stator pole 31, and the stopping portion 311 can prevent the mounting protrusion 331 from coming out of the mounting groove 200, so as to further improve the connection stability between the insulating member 33 and the stator pole 31. Further, a first arc surface 312 is disposed on a side of the stopping portion 311 facing the insulating member 33, and a second arc surface 3311 is disposed on a side of the mounting protrusion 331 facing the stator pole 31. So can make things convenient for the installation arch 331 to slide into mounting groove 200 along backstop portion 311 through first arc surface 312 and the cooperation of second arc surface 3311 direction, utilize the sliding fit between installation arch 331 and the stator pole 31 to realize the assembly, avoid utilizing external force to increase the deflection of installation arch 331 along the perpendicular to inserting the direction and in order to realize assembling with stator pole 31, further reduce the deflection of insulating part 33, guarantee the stability of coil 32 winding position.

In one embodiment, referring to fig. 9, the bottom of the mounting groove 200 is matched with the second arc surface 3311, so that the bottom of the mounting groove can be attached to the second arc surface 3311. Therefore, the connection stability between the insulating piece 33 and the stator pole 31 can be further improved, and the insulating piece 33 is prevented from slightly moving relative to the stator pole 31.

In one embodiment, referring to fig. 6 and 7, the insulating member 33 includes a circumferential wall 332, a first outer extension 333, and a second outer extension 334. The circumferential wall 332, the first outer extension part 333, and the second outer extension part 334 are all disposed around the mounting space 100 so as to be able to be sleeved on the stator pole 31. Further, the first extending portion 333 and the second extending portion 334 are respectively located at two ends of the circumferential wall 332 opposite to each other in the insertion direction, and extend to a side away from the circumferential wall 332 to form a winding space 300 by surrounding the circumferential wall 332, and the coil 32 is wound on the circumferential wall 332 and is accommodated in the winding space 300. The coil 32 can be electrically isolated from the stator pole 31 by the limitation of the circumferential wall 332, the first extension part 333, and the second extension part 334, and the stability of the winding position of the coil 32 can be further ensured, so that the coil 32 is isolated from the external structure, and the stability of the operation of the coil 32 can be ensured. As shown in fig. 9, in the present embodiment, the second outer extension portion 334 is disposed adjacent to the rotor assembly 20, and the mounting projection 331 is disposed on the second outer extension portion 334. The circumferential wall 332 is clearance fit with the stator poles 31. This facilitates the circumferential wall 332 to be sleeved over the stator pole 31. As shown in fig. 10, in another embodiment, the mounting boss 331 includes a fixing portion 3312 and a suspension portion 3313. The fixing portion 3312 is provided in the insulator 33. The overhang portion 3313 is bent and extended from the fixing portion 3312 into the installation space 100 and is spaced apart from the insulator 33. Specifically, the fixing portion 3312 is disposed on the second extension portion 334, and the suspending portion 3313 is bent and extended from the fixing portion 3312 into the installation space 100 and disposed at a distance from the circumferential wall 332. As mentioned above, the clearance fit between the circumferential wall 332 and the stator pole 31 can also provide an avoidance space for the deformation of the suspension portion 3313 in the direction perpendicular to the insertion direction, further avoiding the deformation of the insulator 33 caused by the deformation of the mounting protrusion 331, and improving the stability of the winding position of the coil 32.

In one embodiment, referring to fig. 6 and 7 together, at least one of the first and second outer extensions 333, 334 is provided with a split slot 400, the split slot 400 being used to isolate the phase lines 321 of different phases of the coil 32. Namely, two phase lines 321 which are not adjacent to each other are respectively placed in each splitting slot 400 (for example, an AC phase is placed in one splitting slot 400, and a BD phase is placed in the other 1 splitting slot 400) to realize split-phase isolation. In this embodiment, with continued reference to fig. 6 and 7, the wire-dividing slot 400 is disposed on the first extending portion 333. A side of the first outward extension part 333 away from the circumferential wall 332 is provided with a first notch 500 to communicate the winding space 300 with the branching groove 400. This facilitates the introduction of the phase line 321 of the coil 32 from the winding space 300 into the branching groove 400. It is understood that in other embodiments, the branching slot 400 may be provided only on the first outer extension 333 or only on the second outer extension 334 or on the first outer extension 333 and the second outer extension 334, respectively. Similarly, the branch groove 400 is provided on the second extending portion 334, and a second notch is provided on a side of the second extending portion 334 away from the circumferential wall 332 to communicate the winding space 300 with the branch groove 400. This facilitates the introduction of the phase line 321 of the coil 32 from the winding space 300 into the branching groove 400. In this embodiment, the widths of the first notch 500 and the second notch are 3-10 mm.

In one embodiment, the insulating member 33 is made of nylon or plastic material and is integrally injection-molded, so as to have a certain rigidity under the condition of ensuring insulation, and ensure the position stability of the coil 32 relative to the stator pole 31.

In one embodiment, as shown in fig. 2 to 5, 8 and 14, the body 34 is a polygonal-like ring structure, and each stator pole 31 is accommodated in the space enclosed by the body 34 and is correspondingly disposed on each side. When the switched reluctance motor works, the rotor assembly 20 can attract the stator poles 31, radial tension is generated on the two radial stator poles 31 at a certain moment, the switched reluctance motor is easy to vibrate, the body 34 is of a similar polygonal annular structure, the stator poles 31 are arranged on each side in a one-to-one correspondence mode, the rigidity of the body 34 is improved, deformation of the body 34 caused by the radial tension of the rotor assembly 20 is reduced, the position of each stator pole 31 is stable, and vibration of the switched reluctance motor is reduced. In this embodiment, the body 34 and the stator pole 31 are integrally formed by laminating non-oriented silicon steel sheets with low loss and high magnetic conductance. A plurality of bulges are punched when the silicon steel sheet is stamped, and a plurality of silicon steel sheets are laminated to achieve self-locking, so that iron core locking processes such as gluing, welding, cramping and the like are omitted.

In one embodiment, as shown in fig. 5, 6 and 13, the first outward extension 333 is disposed proximate to the body 34. The first extension 333 has a plurality of stripe portions 3331. The adjacent strips 3331 are spaced apart to form the distribution grooves 400. The body 34 has an abutting portion 341 parallel to the insertion direction, and at least one strip portion 3331 abuts against the abutting portion 341. In this way, the abutting portion 341 and the bar portion 3331 can be engaged with each other in the direction perpendicular to the insertion direction, and the stability of connection between the insulator 33 and the stator pole 31 can be further improved. In this embodiment, the abutting portion 341 is located on one end surface of the main body 34, the strip portions 3331 are all parallel to the end surface, and the strip portions 3331 close to the end surface abut against the abutting portion 341. Further, the abutting portion 341 and the insulating member 33 are made of the same material, as mentioned above, the strip portion 3331 may also be made of nylon or plastic, so as to ensure the insulation between the phase line 321 and the body 34, and meanwhile, the strip portion 3331 has the characteristic of elasticity and can elastically abut against the body 34, so as to further improve the stability of the connection between the insulating member 33 and the stator pole 31. In this embodiment, the thickness of the strip portion 3331 is 0.5-2 mm, and the size of the protrusion outside the first extension portion 333/the second extension portion 334 is 2-6 mm.

In one embodiment, as shown in fig. 8, the mounting grooves 200 penetrate the stator poles 31 in a direction perpendicular to the insertion direction of the stator poles 31, and the mounting grooves 200 are plural in number and symmetrically disposed about the stator poles 31. This ensures that the stator poles 31 are radially symmetrical with respect to the rotor assembly 20, ensuring that the magnetic field generated at each stator pole 31 location is uniform around the rotor assembly 20. In this embodiment, the number of the mounting grooves 200 is two, and the mounting grooves are located on both sides of the stator pole 31. Further, at least two mounting protrusions 331 are provided in each mounting groove 200. The plurality of mounting protrusions 331 located in the same mounting groove 200 are distributed at equal intervals, so that the stress between the insulating member 33 and the stator pole 31 is ensured to be uniform, and the connection stability is further improved.

In one embodiment, referring to fig. 1, 2 and 15-17, the rotor assembly 20 includes a rotating shaft 21 and a rotor pole 22 annularly disposed on the rotating shaft 21. In this embodiment, the number of the rotor poles 22 is 6, and 8 stator poles 31 and coils 32 are uniformly distributed with respect to the rotation shaft 21, thereby forming a four-phase (8/6-pole type) structure. As is well known in the art, the number of stator poles 31 and rotor poles 22, the number of coils 32, and the number of coils 32 can vary widely and can be selected by the designer to suit the design criteria at hand. Further, the rotor assembly 20 further includes a plurality of monitoring portions 23, and each monitoring portion 23 corresponds to each rotor pole 22 one by one and is disposed on the rotating shaft 21. That is, the number of the monitoring portions 23 is the same as the number of the rotor poles 22, and the positions of the rotor poles 22 are calibrated in a one-to-one correspondence. Further, the monitoring portion 23 can sequentially pass through the position monitoring units 353 as the rotating shaft 21 rotates to generate the aforementioned pulse signals. As shown in fig. 16 and 17, the monitoring portion 23 has a first edge 231 and a second edge 232 disposed opposite each other along its rotational path, and a first plane passing through the center line a of one of the adjacent rotor poles 22 and the rotational axis 21 thereof is tangent to the first edge 231, such that the first edge 231 can demarcate the position of the center line a of the rotor pole 22. Further, the second edge 232 is located on the symmetry plane b between the above-mentioned adjacent rotor poles 22. Such that the second edge 232 can demarcate a symmetry plane b between adjacent rotor poles 22. In the present embodiment, each monitoring unit 23 constitutes a code wheel structure, and the number of monitoring units 23 is 6, and the monitoring units are in an arc-shaped structure of 30 °. The rotor assembly 20 also includes a rotor fan 24.

In one embodiment, as shown in fig. 14, one of the two position monitoring units 353 in the same group of position monitoring units is located in a second plane passing through the centerline c of one of the adjacent stator poles 31 and the rotational axis 21, the rotational axis 21 being coaxial with the rotational axis of the rotor assembly 20. The other of the two position monitoring units 353 in the same position monitoring unit group is located on the symmetry plane d between the above-mentioned adjacent stator poles 31. This can further improve the accuracy of position and speed control of the rotor assembly 20. In this embodiment, the number of the rotor poles 22 is 6, and the rotor poles are uniformly distributed with 8 stator poles 31 and coils 32 relative to the rotating shaft 21, so that the included angle between the two position monitoring units 353 in the same position monitoring unit group and the rotating shaft 21 is 22.5 °. In this embodiment, the number of the position monitoring unit groups is two. The four position monitoring units 353 are sequentially arranged at intervals of 22.5 degrees and are matched with the 6 monitoring parts 23, 48 pulse signals can be generated when the rotor assembly 20 rotates for one circle, and 8 unique position information is obtained, so that four phases of 8 stator poles 31 are excited, and the rotation control of the rotor assembly 20 is realized.

In one embodiment, the circuit board 351 is disposed on the body 34 through at least one insulator 33. As shown in fig. 6, 7, 11, 12 and 14, in the present embodiment, the circuit board 351 is disposed opposite to the coil 32 to be measured, and the circuit board 351 is connected to the insulating members 33 located at both sides of the coil 32 in addition to the insulating members 33 corresponding to the coil 32. This further improves the stability of the connection between the circuit board 351 and the body 34. Further, the circuit board 351 is provided with a jack 3510, and the jack 3510 is used for plugging with the insulating member 33 connected to the circuit board 351. Specifically, the insertion hole 3510 is a square hole, and the insulating member 33 is provided with a plug 335 that is inserted into the insertion hole 3510, so as to further improve the connection stability between the circuit board 351 and the insulating member 33. The plug 335 is disposed on the first extending portion 333 and/or the second extending portion 334 and extends to a side away from the circumferential wall 332, the extending distance is 1-3 mm, and the width of the plug 335 is 3-8 mm.

In one embodiment, as shown in fig. 11, 13 and 14, the monitoring assembly 35 further includes a terminal block 354. The connection terminal block 354 is electrically connected to the circuit board 351 and is used to electrically connect the circuit board 351 with an external circuit. The arrangement of the terminal block 354 can more conveniently transmit the monitoring data of the monitoring assembly 35 to the outside, so that the state of the switched reluctance motor can be conveniently known and the switched reluctance motor can be controlled. In this embodiment, the connection terminal block 354 is a bent pin connector, which can form a parallel outlet with the circuit board 351 to facilitate the plugging operation with the external circuit. The temperature measuring unit 352 is an NTC thermistor. The position monitoring unit 353 is an optoelectronic position sensor.

In one embodiment, referring to fig. 1 to 5, a plurality of positioning bosses 342 are disposed on a side of the body 34 away from the stator pole 31, and the positioning bosses 342 are used for positioning and connecting with the housing 10. Therefore, the position accuracy between the body 34 and the shell 10 is ensured, and meanwhile, the eccentricity of the rotor assembly 20 caused by assembly can be reduced, and abnormal vibration and noise of the switched reluctance motor caused by the misalignment of the rotor assembly 20 are prevented. Further, the body 34 is further provided with a mounting hole 600, and the mounting hole 600 is used for axially locking with the housing 10. As shown in fig. 1, 18 and 19, specifically, the housing 10 includes a front end cover 11 and a rear end cover 12, the front end cover 11 is provided with a plurality of first bosses 111, the first bosses 111 are provided with first sockets 700, the rear end cover 12 is provided with a plurality of second bosses 121, the second bosses 121 are provided with second sockets 800, the front end cover 11 and the rear end cover 12 are provided at two sides of the body 34, and are respectively inserted into and positioned on the positioning bosses 342 through the first sockets 700 and the second sockets 800. Thus, through the above arrangement, a circumferential spigot can be formed between the shell 10 and the body 34 for positioning, the eccentricity of the rotor assembly 20 caused by assembly is further reduced, abnormal vibration and noise of the switched reluctance motor caused by the misalignment of the rotor assembly 20 are prevented, and meanwhile, the front end cover 11 and the rear end cover 12 can be installed with the body 34. Further, the first boss 111 and the second boss 121 are provided with mounting portions 900 to be fitted with the mounting holes 600. The mounting portion 900 may be a shaft structure that is inserted into the mounting hole 600 to achieve axial fixation. In this embodiment, the mounting hole 600 penetrates the body 34, and the mounting portion 900 has a through-hole structure or a screw hole. The mounting hole 600 and the mounting portion 900 are inserted with a connecting member 40 to axially tension and fix the front cover 11 and the rear cover 12 relative to the body 34. Further, the mounting hole 600 is a through hole structure or a screw hole.

In one embodiment, as shown in fig. 18 and 19, the first boss 111 is provided with a plurality of first attaching portions 1111 extending toward one side of the body 34 to form the first socket 700. The size that first laminating portion 1111 extends is 1 ~ 5mm, and the size that evades in first boss 111 promptly is 1 ~ 5mm, and the thickness of first laminating portion 1111 is 1 ~ 3 mm. The first fitting portion 1111 can be fitted to the body 34 to achieve radial positioning between the front end cover 11 and the body 34. The second boss 121 is provided with a plurality of second fitting portions 1211 extending toward one side of the body 34 to form a second socket 800. The extension of the second bonding portion 1211 is 1-5 mm, that is, the protrusion of the second projection 121 is 1-5 mm, and the thickness of the second bonding portion 1211 is 1-3 mm. The second fitting portion 1211 can be fitted to the body 34 to achieve radial positioning between the rear end cap 12 and the body 34. In this embodiment, the body 34 is an octagon-like ring structure, the sides of the four corners of the body have arc surfaces, the positioning boss 342 is formed on the arc surfaces, and the first attaching portion 1111 and the second attaching portion 1211 are attached to the arc surfaces. In this embodiment, the width of the first and second sockets 700 and 800 is 3-10 mm. The first boss 111 protrudes from the front end cover 11 by 3-15 mm. The size of the second boss 121 protruding out of the rear end cover 12 is 3-15 mm.

In an embodiment, referring to fig. 1, fig. 2, fig. 18 and fig. 19 together, the front cover 11 includes a front end surface 112 and a first circumferential surface 113, the first circumferential surface 113 is disposed around the front end surface 112 and extends from the front end surface 112 to the side of the body 34, the rear cover 12 includes a rear end surface 122 and a second circumferential surface 123, the second circumferential surface 123 is disposed around the rear end surface 122 and extends from the rear end surface 122 to the side of the body 34, the front end surface 112 and the rear end surface 122 are both provided with a first through hole 13, and the first circumferential surface 113 and the second circumferential surface 123 are both provided with a second through hole 14. So can make switched reluctance motor's axial and circumference all have the louvre with the setting of first through-hole 13 and second through-hole 14 to prevent that switched reluctance motor from receiving in circumference or axial and sheltering from, influence switched reluctance motor's heat dissipation. Further, in this embodiment, the rotating shaft 21 penetrates through the front end surface 112 and the rear end surface 122 and is rotatably connected with the front end surface 112 and the rear end surface 122 through the bearing 50, and the annular protrusions 15 for fixing the bearing 50 are arranged on the front end surface 112 and the rear end surface 122, so as to improve the connection stability of the bearing 50 with the front end surface 112 and the rear end surface 122.

In one embodiment, as shown in fig. 1, 18 and 19, the first through holes 13 are fan-shaped and evenly distributed around the rotation axis 21 of the rotor assembly 20, and in this embodiment, the number of the first through holes 13 is 8. The second through hole 14 is a kidney-shaped hole. It is understood that in other embodiments, the first through holes 13 and the second through holes 14 may have other shapes, and the uniform distribution may be ensured. Further, the plurality of second through holes 14 form a group, and the second through holes 14 in each group are arranged at intervals of one side corresponding to one side of the body 34, so that the rigidity of the first circumferential surface 113 and the second circumferential surface 123 is ensured while the heat dissipation uniformity of the switched reluctance motor is ensured. In this embodiment, each group of the second through holes 14 includes 3 to 15 second through holes 14. Further, a through groove 16 is formed in the housing 10, the phase line 321 can be led out from the through groove 16, and the circuit board 351 can be exposed from the housing 10 through the through groove 16. It is understood that in other embodiments, the number of through slots 16 may be multiple, for different phase line 321 leads and circuit board 351 exposed in the housing 10.

In one embodiment, referring to fig. 2 and 5 together, the stator mechanism 30 further includes a clamping assembly 36, and the clamping assembly 36 is used for clamping the phase wire 321 and leading out of the stator mechanism 30. So make phase line 321 not draw forth through circuit board 351 for the strong and weak electric separation of switched reluctance motor, and then prevent that the signal of temperature measurement unit 352 and position monitoring unit 353 from being disturbed, improve switched reluctance motor's operational reliability. As shown in fig. 2, the clip member 36 may be received in the channel 16.

In one embodiment, as shown in fig. 20, the clamping assembly 36 includes a first clamping portion 361 and a second clamping portion 362, the first clamping portion 361 and the second clamping portion 362 are detachably connected and can be enclosed to form a plurality of lead slots 363, and each lead slot 363 is used for accommodating the phase lines 321 of different phases. Therefore, the phase lines 321 of different phases can be separated through the plurality of lead slots 363, and mutual interference is prevented.

In one embodiment, with continued reference to fig. 20, the lead groove 363 is opened at one of the first clamping portion 361 and the second clamping portion 362, the other of the first clamping portion 361 and the second clamping portion 362 is provided with a line pressing protrusion 364, and the line pressing protrusion 364 can extend into the lead groove 363 to abut the phase wire 321 at the bottom of the lead groove 363. So can guarantee through the setting of line ball arch 364 that phase line 321 can stabilize the centre gripping between first clamping part 361 and second clamping part 362, avoid phase line 321 to disturb switched reluctance motor's operation. In this embodiment, the lead groove 363 is formed on the first clamping portion 361, and the pressing protrusion 364 is formed on the second clamping portion 362.

In one embodiment, with reference to fig. 20, a receiving groove 365 is formed between adjacent wire pressing protrusions 364, and a groove wall of the wire guiding groove 363 can be partially received in the receiving groove 365. This allows the groove walls of the lead groove 363 and the lead protrusions 364 to be staggered to further enhance the isolation effect of the phase lines 321 of different phases. In this embodiment, the first clamping portion 361 and the second clamping portion 362 are further provided with through holes 366, and the phase line 321 can be clamped by the fasteners passing through the through holes 366 so as to be connected with the body 34. Further, the fastener is a threaded member.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the utility model is not limited by the scope of the appended claims.

Claims (10)

1. The monitoring assembly is used for a switched reluctance motor and is characterized by comprising a circuit board, a temperature measuring unit and a plurality of groups of position monitoring unit groups, wherein the temperature measuring unit is electrically connected with the circuit board, the circuit board can enable the temperature measuring unit to be abutted against one coil of the switched reluctance motor, each position monitoring unit comprises two position monitoring units, each position monitoring unit is electrically connected with the circuit board, and the position monitoring units are used for monitoring the rotating position of a rotor assembly of the switched reluctance motor.

2. The monitoring assembly of claim 1, wherein one of the two position monitoring units in the same set of position monitoring units is located in a second plane passing through a centerline of one of the adjacent stator poles of the switched reluctance motor and a rotational axis of the rotor assembly, and the other of the two position monitoring units in the same set of position monitoring units is located in a plane of symmetry between the adjacent stator poles.

3. The monitoring assembly of claim 1, further comprising a terminal block electrically connected to the circuit board and configured to electrically connect the circuit board to external circuitry.

4. The monitoring assembly of claim 3, wherein the terminal block is a pin connector capable of forming a parallel outlet with the circuit board.

5. The monitoring assembly of claim 1, wherein the temperature measuring unit is an NTC thermistor.

6. The monitoring assembly of claim 1, wherein the position monitoring unit is an optoelectronic position sensor.

7. A switched reluctance machine, comprising:

a housing;

a rotor assembly rotatably coupled to the housing; and

a stator mechanism disposed in the housing, the stator mechanism comprising a plurality of stator poles, each of the stator poles being distributed around the rotor assembly, the stator mechanism further comprising a plurality of coils, each of the coils being disposed in one-to-one correspondence with each of the stator poles via an insulator, the insulator being configured to electrically isolate the stator poles from the coils, the stator mechanism further comprising the monitoring assembly of any one of claims 1 to 6.

8. The switched reluctance motor of claim 7, wherein the rotor assembly comprises a rotating shaft and rotor poles annularly arranged on the rotating shaft, the rotor assembly further comprises a plurality of monitoring portions, each monitoring portion corresponds to each rotor pole and is arranged on the rotating shaft, each position monitoring unit is arranged around the rotating shaft, the monitoring portions can sequentially pass through each position monitoring unit along the rotation of the rotating shaft, each monitoring portion has a first edge and a second edge which are arranged along the rotation path of the monitoring portion in an opposite manner, a first plane passing through a center line of one of the adjacent rotor poles and a rotation axis of the rotor pole is tangent to the first edge, and the second edge is located on a symmetrical plane between the adjacent rotor poles.

9. The switched reluctance motor of claim 7, wherein the stator mechanism further comprises a body, each of the stator poles is received in a space defined by the body and disposed in the body, and the circuit board is disposed in the body through at least one of the insulators to abut the temperature measuring unit against one of the coils.

10. The switched reluctance motor of claim 9, wherein the circuit board is provided with a jack, and the jack is used for being plugged with the insulator connected with the circuit board.

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