Pole shoe optimization method and device of consequent-pole motor, electronic equipment and program product

Abstract

The invention provides a pole shoe optimization method and device of a consequent-pole motor, electronic equipment and a program product. The method comprises the steps of obtaining a preset size and a preset number of pole pairs of a rotor; based on the preset number of pole pairs, determining an angle range of an arc needing to be trimmed; determining the angle of the arc based on the preset size of the rotor and the angle range of the arc; determining a pole-arc coefficient and a cutting length based on the angle of the arc; the cutting thickness is determined according to the fact that the breath magnetic resistance tends to be smooth; a basic shape of the rotor is determined, and the rotor is cut based on the cut length, the cut thickness. According to the pole shoe optimization method and device of the consequent pole motor, the electronic equipment and the program product, the angle of the arc with the large inner diameter and the small inner diameter is determined through the minimum torque, then the cutting depth of the end of the arc with the small inner diameter is determined based on the fact that air gap magnetic resistance needs to tend to be smooth, finally the arc with the small inner diameter is cut into a straight line, and then the pole shoe with uniform magnetic flux and high reliability is obtained. Therefore, the cogging torque of the rotor structure is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of electric motors, and in particular to a rotor structure for an alternating pole motor. Background Technology

[0002] Because alternating pole motors only have N poles, and the S pole (pole shoe) is formed by magnetizing the N pole, the distance from the pole shoe to the permanent magnet is not uniform at all points. This results in uneven magnetic flux on the pole shoe, unlike the permanent magnet where the magnetomotive force is equal everywhere. The energy exchange in the air gap is also uneven, thus generating a large cogging torque. Summary of the Invention

[0003] The technical problem to be solved by this disclosure is to overcome the defects in the prior art and provide a method, apparatus, electronic device and program product for optimizing the pole shoes of an alternating pole motor with uniform magnetic flux.

[0004] This disclosure solves the above-mentioned technical problems through the following technical solution: a method for optimizing the pole shoes of an alternating pole motor.

[0005] Obtain the preset dimensions and preset number of pole pairs p of the rotor;

[0006] The angle of the arc requiring trimming is determined based on the preset pole pair number. scope;

[0007] The angle of the arc is determined based on the preset dimensions of the rotor and the angle range of the arc.

[0008] Based on the angle of the arc Determine the polar arc coefficient and cutting length ;

[0009] The cutting thickness h is determined based on the smoothing of the magnetic reluctance of the air.

[0010] The basic shape of the rotor is determined, and the rotor is cut based on the cutting length and cutting thickness.

[0011] Optionally, the preset dimensions of the rotor include an outer diameter, a large inner diameter, and a small inner diameter.

[0012] Optionally, the angle of the arc requiring trimming is determined based on the preset number of motor pole pairs. The scope, specifically:

[0013] ;

[0014] Where p is the extreme logarithm. The angle of the arc.

[0015] Optionally, determining the angle of the arc based on the preset dimensions of the rotor and the angle range of the arc specifically includes:

[0016] The rotor is simulated based on its preset dimensions and preset number of pole pairs;

[0017] The angle of the arc is determined based on the minimum torque fluctuation within the angular range of the arc. .

[0018] Optionally, determining the basic shape of the rotor and cutting the rotor based on the cutting length and cutting thickness specifically includes:

[0019] The basic shape of the rotor includes a uniform outer diameter and a ring formed by a preset number of pole pairs spaced between small inner diameter arcs and large inner diameter arcs.

[0020] At the end of the small inner diameter arc, the arc end is cut with the cutting thickness as a reference and the direction of the rotor's radius at this point as the direction;

[0021] The deepest point of the cut at both ends of the cutting connection forms a straight line.

[0022] In another aspect, this disclosure provides a pole shoe optimization device for an alternating pole motor, the device comprising,

[0023] The acquisition module is used to acquire the preset dimensions of the rotor and the preset number of pole pairs p;

[0024] The range acquisition module is used to determine the angle of the arc that needs to be tangled based on the preset pole pair number. scope;

[0025] An angle determination module is used to determine the angle of the arc based on the preset size of the rotor and the angle range of the arc;

[0026] The calculation module is used to calculate the angle based on the arc. Determine the polar arc coefficient and cutting length ;

[0027] The thickness determination module is used to determine the cutting thickness h based on the smoothing of the air magnetic reluctance;

[0028] The shape determination module determines the basic shape of the rotor and cuts the rotor based on the cutting length and cutting thickness.

[0029] Optionally, the angle determination module further includes:

[0030] The simulation module is used to simulate the rotor according to the preset dimensions and preset number of pole pairs of the rotor;

[0031] A determining module is used to determine the angle of the arc based on the minimum torque fluctuation within the angular range of the arc.

[0032] In another aspect of this disclosure, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and for running on the processor, characterized in that the processor implements the optimization method described in any one of the above-described methods when executing the computer program.

[0033] In another aspect of this disclosure, a computer-readable storage medium is provided having a computer program stored thereon, characterized in that the computer program, when executed by a processor, implements the optimization method described in any one of the above descriptions.

[0034] In another aspect of this disclosure, a computer program product is provided, comprising a computer program that, when executed by a processor, implements the optimization method as described in any one of the preceding descriptions.

[0035] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this disclosure.

[0036] The positive and progressive effects of this disclosure are as follows: The pole shoe optimization method, device, electronic equipment and program product of the alternating pole motor disclosed herein determine the angle of the arc of the large and small inner diameters by minimizing the torque, and then determine the cutting depth of the small inner diameter arc end based on the need for the air gap magnetic reluctance to tend to be smooth, and finally cut the small inner diameter arc into a straight line, thereby obtaining a rotor structure with uniform magnetic flux and thus reducing the cogging torque. Attached Figure Description

[0037] Figure 1 A flowchart of the pole shoe optimization method for an alternating pole motor provided in Embodiment 1 of this disclosure;

[0038] Figure 2 This is a schematic diagram of the rotor structure of the alternating pole motor provided in Embodiment 1 of this disclosure;

[0039] Figure 3 This is a schematic diagram of the optimized rotor pole shoes of the alternating pole motor provided in Embodiment 1 of this disclosure;

[0040] Figure 4 A schematic diagram of the frame of the pole shoe optimization device for the alternating pole motor provided in Embodiment 2 of this disclosure;

[0041] Figure 5 A schematic diagram of an electronic device provided in Embodiment 3 of this disclosure. Detailed Implementation

[0042] The present disclosure is further illustrated below by way of embodiments, but the present disclosure is not limited to the scope of the embodiments described herein.

[0043] The prefixes such as "first" and "second" used in this disclosure are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this disclosure does not constitute a limitation on the described objects. The description of the described objects is given in the context of the embodiments, and the use of such prefixes should not constitute unnecessary restrictions. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0044] Example 1

[0045] Figure 1 A flowchart of a pole shoe optimization method for an alternating pole motor, provided as an exemplary embodiment of this disclosure, includes the following steps:

[0046] S10, obtain the preset dimensions and preset pole pair number p of the rotor; the preset dimensions of the rotor include the outer diameter, the large inner diameter, and the small inner diameter. The rotor is a ring structure with a uniform outer diameter and alternating small and large inner diameter arcs, such as... Figure 2 As shown, the large inner diameter arc and the small inner diameter arc form a pair, and the pole pair number p is the number of pairs of large and small inner diameter arcs. Furthermore, the angles corresponding to each pair of large and small inner diameter arcs are the same, that is, there are p pairs of arcs, and the degree measure of each pair of arcs is 360 / p.

[0047] S20, determine the angle of the arc that needs to be trimmed based on the preset pole pair number. Scope; Since this rotor is an external rotor motor rotor, the part that needs to be trimmed is the arc with a smaller inner diameter, such as... Figure 3 As shown, due to its symmetry, the angle of half of the small inner diameter arc that needs to be trimmed is... It is used as a parameter in the calculation, and it is also considered that the angle of the smaller inner diameter arc needs to be smaller than the angle of the larger inner diameter arc. Therefore, the angle of the arc... The range is For example, in this embodiment, the pole-pole number p is 5, then: .

[0048] S30, determine the angle of the arc based on the preset size of the rotor and the angle range of the arc;

[0049] This step specifically includes:

[0050] S31, The rotor is simulated according to the preset dimensions and preset number of pole pairs; specifically, the shape of the rotor is simulated using simulation software, and then the performance of the rotor is tested.

[0051] S32, Based on the minimum torque fluctuation within the angular range of the arc, determine the angle of the arc. Specifically, this involves adjusting the arc angle of the cut edge. Obtain the rotor's torque and determine the arc angle under minimum fluctuation. .

[0052] S40, based on the angle of the arc Determine the polar arc coefficient and cutting length ;

[0053] Specifically, ;

[0054] is the polar arc coefficient, and p is the polar log number;

[0055] To ensure that the minimum air gap remains unchanged, the cutting should start from the center of the circle and move in a straight line towards both sides from the midpoint of the pole shoe. The cutting length can be determined by trigonometric functions, and this cutting length is also half of the entire cutting.

[0056] ;

[0057] R is the cutting length, and R is the smaller inner diameter;

[0058] S50, the cutting thickness h is determined based on the smoothing of the air magnetic resistance;

[0059] Specifically, define the depth of cut. , The depth of the cut in the rotor along the radial direction at the two ends of the small inner diameter arc at the edge of the pole shoe; because the magnetic resistance is equal everywhere in the air gap, the magnetic resistance of the entire air gap can be calculated by integration.

[0060] Construct the expression for air gap reluctance:

[0061] ;

[0062] in It is the vacuum permeability, and L is the axial length of the motor.

[0063] make:

[0064] ;

[0065] Then when the air gap magnetic reluctance When smoothing is required, the following is necessary:

[0066] ;

[0067] Therefore, we can obtain: It is about implicit functions,

[0068] ;

[0069] Ultimately, a definite h can be obtained.

[0070] S60, determine the basic shape of the rotor, and cut the rotor based on the cutting length and cutting thickness. Figure 3 In the example of a set of arcs, the dashed part is the small inner diameter arc before cutting, while the straight line above is the straight line after cutting.

[0071] Specifically, the basic shape of the rotor includes a uniform outer diameter, and a ring formed by a preset number of pole pairs spaced between small inner diameter arcs and large inner diameter arcs;

[0072] At the end of the small inner diameter arc, the arc end is cut with the cutting thickness as a reference and the direction of the rotor's radius at this point as the direction;

[0073] The deepest point of the cut at both ends of the cutting connection forms a straight line.

[0074] The pole shoe optimization method of the alternating pole motor in this embodiment determines the angle of the arc of the large and small inner diameters by minimizing the torque, and then determines the cutting depth of the small inner diameter arc end based on the need for the air gap magnetic reluctance to be smooth. Finally, the small inner diameter arc is cut into a straight line, thereby obtaining a rotor structure with uniform magnetic flux and reduced cogging torque.

[0075] Example 2

[0076] Corresponding to the aforementioned embodiments of the pole shoe optimization method for alternating pole motors, this disclosure also provides embodiments of the pole shoe optimization apparatus for alternating pole motors, such as... Figure 4 As shown;

[0077] Module 1 is used to acquire the preset dimensions of the rotor and the preset number of pole pairs p;

[0078] Range acquisition module 2 is used to determine the angle of the arc that needs to be tangled based on the preset pole pair number. scope;

[0079] Angle determination module 3 is used to determine the angle of the arc based on the preset size of the rotor and the angle range of the arc;

[0080] Calculation module 4 is used to calculate the angle based on the arc. Determine the polar arc coefficient and cutting length ;

[0081] Thickness determination module 5 is used to determine the cutting thickness h based on the smoothing of the air magnetic resistance;

[0082] Shape determination module 6 determines the basic shape of the rotor and cuts the rotor based on the cutting length and cutting thickness.

[0083] The angle determination module also includes:

[0084] The simulation module 31 is used to simulate the rotor according to the preset dimensions and preset number of pole pairs of the rotor;

[0085] Determining module 32 is used to determine the angle of the arc based on the minimum torque fluctuation within the angle range of the arc. .

[0086] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this disclosure according to actual needs.

[0087] Example 3

[0088] Figure 5 This is a schematic diagram of the structure of an electronic device according to an example embodiment of the present disclosure. The electronic device includes a memory, a processor, and a computer program stored in the memory and used to run on the processor. When the processor executes the computer program, it implements the extreme shoe optimization method described in any of the above embodiments. Figure 5 The electronic device 50 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments disclosed herein.

[0089] like Figure 5 As shown, the electronic device 50 can be manifested in the form of a general-purpose computing device, such as a server device. The components of the electronic device 50 may include, but are not limited to: at least one processor 51, at least one memory 52, and a bus 53 connecting different system components (including memory 52 and processor 51).

[0090] Bus 53 includes a data bus, an address bus, and a control bus.

[0091] The memory 52 may include volatile memory, such as random access memory (RAM) 521 and / or cache memory 522, and may further include read-only memory (ROM) 523.

[0092] The memory 52 may also include a program tool 525 (or utility) having a set (at least one) program module 524, such program module 524 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0093] The processor 51 executes various functional applications and data processing by running computer programs stored in the memory 52, such as the extreme shoe optimization method provided in any of the above embodiments.

[0094] Electronic device 50 can also communicate with one or more external devices 54 (e.g., keyboard, pointing device, etc.). This communication can be performed through input / output (I / O) interface 55. Furthermore, electronic device 50 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public network, such as the Internet) via network adapter 56. As shown, network adapter 56 communicates with other modules of electronic device 50 via bus 53. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with electronic device 50, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems.

[0095] It should be noted that although several units / modules or sub-units / modules of the electronic device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided and embodied by multiple units / modules.

[0096] Example 4

[0097] This disclosure also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the extreme shoe optimization method provided in any of the above embodiments.

[0098] The readable storage medium may be more specifically adopted, including but not limited to: portable disk, hard disk, random access memory, read-only memory, erasable programmable read-only memory, optical storage device, magnetic storage device, or any suitable combination thereof.

[0099] Example 5

[0100] This disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements the extreme shoe optimization method described in any of the above embodiments.

[0101] The program code for executing the computer program product of this disclosure can be written in any combination of one or more programming languages, and the program code can be executed entirely on a user device, partially on a user device, as a stand-alone software package, partially on a user device and partially on a remote device, or entirely on a remote device.

[0102] While specific embodiments of this disclosure have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this disclosure is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this disclosure, but all such changes and modifications fall within the scope of protection of this disclosure.

Claims

1. A method for optimizing the pole shoes of an alternating pole motor, characterized in that: Obtain the preset dimensions and preset number of pole pairs of the rotor; The angle range of the arc that needs to be trimmed is determined based on the preset pole pair number. The angle of the arc is determined based on the preset dimensions of the rotor and the angle range of the arc. The polar arc coefficient and cutting length are determined based on the angle of the arc. The cutting thickness is determined based on the smoothing of the air magnetic resistance. The basic shape of the rotor is determined, and the rotor is cut based on the cutting length and cutting thickness.

2. The pole shoe optimization method for an alternating pole motor as described in claim 1, characterized in that, The preset dimensions of the rotor include the outer diameter, the large inner diameter, and the small inner diameter.

3. The pole shoe optimization method for an alternating pole motor as described in claim 1, characterized in that: The determination of the angle range of the arc requiring trimming based on the preset number of motor pole pairs specifically includes: ； Where p is the extreme logarithm. The angle of the arc.

4. The pole shoe optimization method for an alternating pole motor as described in claim 1, characterized in that: The angle of the arc is determined based on the preset size of the rotor and the angle range of the arc; Specifically, it includes: The rotor is simulated based on its preset dimensions and preset number of pole pairs; The angle of the arc is determined based on the minimum torque fluctuation within the angular range of the arc.

5. The pole shoe optimization method for an alternating pole motor as described in claim 1, characterized in that: The process of determining the basic shape of the rotor and cutting the rotor based on the cutting length and cutting thickness specifically includes: The basic shape of the rotor includes a uniform outer diameter and a ring formed by a preset number of pole pairs spaced between small inner diameter arcs and large inner diameter arcs. At the end of the small inner diameter arc, the arc end is cut with the cutting thickness as a reference and the direction of the rotor's radius at this point as the direction; The deepest point of the cut at both ends of the cutting connection forms a straight line.

6. A pole shoe optimization device for an alternating pole motor, characterized in that: The device includes, The acquisition module is used to acquire the preset dimensions and preset number of pole pairs of the rotor; The range acquisition module is used to determine the angle range of the arc that needs to be trimmed based on the preset pole pair number; An angle determination module is used to determine the angle of the arc based on the preset size of the rotor and the angle range of the arc; The calculation module is used to determine the polar arc coefficient and cutting length based on the angle of the arc; The thickness determination module is used to determine the cutting thickness based on the smoothing of the air magnetic resistance. The shape determination module determines the basic shape of the rotor and cuts the rotor based on the cutting length and cutting thickness.

7. The optimization apparatus as described in claim 6, characterized in that, The angle determination module also includes: The simulation module is used to simulate the rotor according to the preset dimensions and preset number of pole pairs of the rotor; A determining module is used to determine the angle of the arc based on the minimum torque fluctuation within the angular range of the arc.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and for running on the processor, characterized in that, When the processor executes the computer program, it implements the optimization method according to any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the optimization method according to any one of claims 1-5.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the optimization method as described in any one of claims 1-5.

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