Processing device, processing method, program, and core

Abstract

The processing device (410) generates a distribution of generation indexes of the magnetic flux resistance portion in the core of the design object based on the distribution of the magnetic property in the design region of the original core, and determines a region of the magnetic flux resistance portion in the core based on the distribution of the generation indexes.

Description

Technical Field

[0001] This disclosure relates to a processing apparatus, processing method, procedure, and iron core, particularly preferably used for designing iron cores. This application claims priority based on Japanese Patent Application No. 2024-018904, filed on February 9, 2024, the contents of which are incorporated herein by reference in their entirety. Background Technology

[0002] In devices that include an iron core, the design of the iron core can sometimes significantly affect the performance of the device (hereinafter, devices including an iron core will be referred to simply as devices). Among the iron cores included in devices, there are those that include magnetic flux obstructions. A magnetic flux obstruction is a part of the iron core where magnetic flux is more difficult to pass through compared to other parts, or where magnetic flux cannot pass through at all. Therefore, depending on the number, location, shape, and size of the magnetic flux obstructions, the flow of magnetic flux within and around the iron core will change. For example, a gap may exist as such a magnetic flux obstruction. Hereinafter, the magnetic flux obstruction that is a gap will also be referred to as a magnetic flux blocking element.

[0003] As a technique for designing flux blocking components such as flux blocking elements, there are methods described in Patent Document 1 and Non-Patent Document 1.

[0004] Patent Document 1 describes a method for defining a region with a basic shape for a flux-blocking element within a design area, and for calculating the optimal solution for the mapping applied to that region. Specifically, in Patent Document 1, the optimal solution is calculated as a mapping that maximizes or minimizes the characteristic value (objective function value) of the device when it operates. Then, the optimal mapping is applied to the basic shape of the flux-blocking element, thereby generating the flux-blocking element. In this way, the technology described in Patent Document 1 uses a matrix representing the mapping applied to the region with the basic shape of the flux-blocking element as a design variable, and calculates the optimal solution for that matrix.

[0005] Furthermore, Non-Patent Document 1 describes a method for generating flux blocking components for an IPM motor using a modified on-off topology method. In the on-off topology method, it is calculated whether multiple grids obtained by dividing the design region are either in an "on" state or an "off" state. For example, the "on" state corresponds to a magnetic material, and the "off" state corresponds to air. In the on-off topology method, the optimal solution is searched for the state of each unit ("on" or "off") where the objective function value is minimized or maximized within the constraints. In a typical on-off topology method, the state of each unit is calculated as an independent state relative to the states of other units. In contrast, Non-Patent Document 1 calculates the state of each unit based on the output of a Normalized Gaussian Network (NGnet) within each unit. The output of NGnet is represented by a weighted sum of normalized Gaussian functions whose values ​​vary smoothly in space. In the technique described in Non-Patent Document 1, the weighting coefficients for the normalized Gaussian function are used as design variables, and the optimal solution for the weighting coefficients is calculated.

[0006] Prior technology documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2021-114099

[0009] Non-patent literature

[0010] Non-Patent Literature 1: Takahiro Sato and 5 others, "Rotor Shape Optimization of Embedded Magnet Synchronous Motor Based on Topology Optimization", Journal of the Institute of Electrical Engineering, Vol. 135, No. 3, pp. 291-298, 2015. Summary of the Invention

[0011] The technical problem that the invention aims to solve

[0012] However, in the methods described in Patent Document 1 and Non-Patent Document 1, if the location of the flux blocking part is possible, the ease (and difficulty) of selecting candidate solutions does not change based on the location of the flux blocking part. Therefore, during the solution search process, the possibility of generating a flux blocking element that contributes less to improving the characteristics of the iron core increases. Thus, there is a risk that time will be spent before the solution converges to the optimal solution. Consequently, there is a risk of increased computational load. On the other hand, when the convergence condition is eased to suppress the increase in computational load, the possibility of generating a flux blocking element that contributes less to improving the characteristics of the iron core based on the optimal solution increases.

[0013] This disclosure addresses the aforementioned problems and aims to generate a flux-impeding section that improves the properties of the iron core without imposing a large computational load.

[0014] Technical means for solving technical problems

[0015] The processing apparatus disclosed herein is a processing apparatus for designing an iron core including a flux-blocking section, comprising: an index calculation unit that calculates a distribution of generation indexes for evaluating the ease of generating the flux-blocking section in the design region based on the distribution of magnetic properties in a design region of an original iron core, which serves as a prototype of the designed iron core; and a determination unit that determines the region of the flux-blocking section in the design region based on the distribution of the generation indexes; wherein the design region is a region in a cut surface of the original iron core, and the cut surface of the original iron core is a cut surface in a direction perpendicular to the direction in which the flux-blocking section is viewed from above.

[0016] The processing method disclosed herein is a processing method for designing an iron core including a flux-blocking section, comprising: an index calculation step, which calculates a distribution of generation indexes for evaluating the ease of generation of the flux-blocking section in the design region based on the distribution of magnetic properties in a design region of an original iron core that serves as a prototype of the designed iron core; and a determination step, which determines the region of the flux-blocking section in the design region based on the distribution of the generation indexes, wherein the design region is a region in a cut surface of the original iron core, and the cut surface of the original iron core is a cut surface in a direction perpendicular to the direction in which the flux-blocking section is viewed from above.

[0017] The procedures disclosed herein enable a computer to function as a part of the processing device.

[0018] The core of this disclosure includes the flux blocking portion in all or part of at least one region of the region determined by the determining portion included in the processing device.

[0019] Invention Effects

[0020] According to this disclosure, a flux-impeding section with improved core characteristics can be generated without applying a large computational load. Attached Figure Description

[0021] Figure 1A This is a diagram illustrating the first example of magnetic flux flow in a region of the rotor core where the magnetic flux density is relatively low.

[0022] Figure 1B This is the second example of a diagram showing the flow of magnetic flux in a region of the rotor core where the magnetic flux density is relatively low.

[0023] Figure 2A This is the first example of a diagram showing the flow of magnetic flux in a region of the rotor core where the magnetic flux density is relatively high.

[0024] Figure 2B This is the second example of a diagram showing the flow of magnetic flux in a region of the rotor core where the magnetic flux density is relatively high.

[0025] Figure 3 This is a diagram illustrating an example of the structure of an IPMSM.

[0026] Figure 4 This is a diagram illustrating an example of the functional configuration of a processing device.

[0027] Figure 5 This is a flowchart illustrating one example of the processing method.

[0028] Figure 6 This is a diagram representing an example of the sampling results.

[0029] Figure 7 This diagram illustrates an example of a method for determining the region of magnetic flux obstruction.

[0030] Figure 8 This is a diagram illustrating an example of the hardware configuration of a processing device.

[0031] Figure 9A This is a diagram illustrating an example of the generation result of the magnetic flux blocking element in the method of this embodiment.

[0032] Figure 9B This is a diagram illustrating an example of the generation result of the magnetic flux blocking element in the method described in Patent Document 1. Detailed Implementation

[0033] Hereinafter, an embodiment of the present disclosure will be described with reference to the accompanying drawings.

[0034] Furthermore, when the objects of comparison, such as length, position, size, and spacing, are the same, differences are included within the scope of this disclosure, except in cases of strict similarity (e.g., differences within the tolerance range determined during design). Additionally, in each figure, the x-y-z coordinates represent the orientation relationship in each figure. In the x-y-z coordinates, the symbol with a black circle (●) inside a white circle (〇) indicates an arrow line pointing from the inside of the paper towards the front, with the positive direction being the arrowhead.

[0035] (Knowledge and Thoughts)

[0036] First, the understanding and ideas obtained by the present disclosure in achieving this embodiment will be explained. In the methods described in Patent Document 1 and Non-Patent Document 1, a flux blocking element can be generated to maximize or minimize the characteristic value (the value of the objective function) of the device. However, for example, in the case of performing optimization calculations, it is necessary to repeatedly search for solutions until the solution converges to the optimal solution. Furthermore, for example, in the case of calculating the characteristic value of the device by performing electromagnetic field analysis, it is necessary to perform electromagnetic field analysis separately in repeated processing. Therefore, when the number of repetitions in the optimization calculation (convergence calculation) increases, there is a risk of increased computational load. Therefore, in order to suppress the increase in computational load, it is considered to ease the convergence condition. However, when the convergence condition is eased, the possibility that the better optimal solution will not be calculated even if a better optimal solution actually exists increases. For example, the possibility of generating a flux blocking element with a relatively small contribution to improving the characteristics of the iron core based on the optimal solution increases. In addition, the generation of flux blocking elements and other flux-impeding parts corresponds to the calculation of information that can determine the area occupied by the flux-impeding parts in the iron core. This information could also be, for example, information indicating the positions (coordinates) of the magnetic flux obstruction and the external boundary line.

[0037] Figure 1A and Figure 1B This is a diagram illustrating the flow of magnetic flux in regions with relatively low magnetic flux density within the rotor cores 101 and 102. Figure 1A The diagram shows the case where the magnetic flux blocking element 111 is present. Figure 1B The diagram shows the case where the magnetic flux blocking element 111 is absent. Furthermore, Figure 2A and Figure 2B This is a diagram illustrating the flow of magnetic flux in regions with relatively high magnetic flux density within the rotor cores 201 and 202. Figure 2A The diagram shows a case where a flux blocking element 211 exists in a region 221 that is extended to the outer peripheral surface of the rotor core 201. Figure 2B The diagram shows the case where there is no flux blocking element extending to the outer peripheral surface of the rotor core 202 (the case where there is a flux blocking element 212 that is not extended to the outer peripheral surface of the rotor core 202). Figure 1A, Figure 1B , Figure 2A and Figure 2B In the diagram, the arrows represent magnetic flux. Furthermore, in... Figure 1A , Figure 1B , Figure 2A and Figure 2B In the diagram, the denser the arrows, the higher the magnetic flux density. Furthermore, although the explanation may not be entirely clear for the sake of simplicity, it is... Figure 1A , Figure 1B , Figure 2A and Figure 2B In the diagram, the greater the concentration of the arrow line, the higher the magnetic flux density.

[0038] Depend on Figure 1A and Figure 1B The comparison shows that even when a flux blocking element 111 is generated in a region of low flux density in the rotor core 101, the flux toward the stator core does not change significantly. Furthermore, less flux bypasses the flux blocking element 111. In other words, the characteristics of the motor do not change much whether the flux blocking element 111 is present or absent.

[0039] In contrast, by Figure 2A and Figure 2B A comparison shows that, in Figure 2A middle, Figure 2B The region 222 of the soft magnetic material shown is replaced with region 221 of the flux blocking element 211. Figure 2A In the process, due to the presence of region 221 of the flux blocking element 211, which is replaced by region 222 of the soft magnetic material, the magnetic flux from the rotor core 201 toward the stator cores 231 and 232 is reduced. Figure 2B The rotor core 202 is bent more significantly towards the magnetic flux of the stator cores 233 and 234. Therefore, since the flux blocking element 212 is changed to the flux blocking element 211, the characteristics of the motor change significantly.

[0040] Based on the above, the present discloses that if the regions of the iron core that have a relatively large impact on the characteristics of the motor due to the presence of flux-blocking parts (gap portions) are calculated more concentratedly (preferably) than regions of the iron core where the impact is relatively small, then the regions of flux-blocking parts can be determined, thereby shortening the calculation time and further improving the characteristics of the iron core. That is, the present discloses that it is preferable to make regions in the original iron core where the impact of flux-blocking parts on the characteristics of the device (e.g., the motor) is relatively small (i.e., regions with relatively low flux density) becomes less likely to have flux-blocking parts. Conversely, the present discloses that it is preferable to make regions in the original iron core where the impact of the presence of flux-blocking parts on the characteristics of the device (e.g., the motor) is relatively large (i.e., regions with relatively high flux density) more likely to have flux-blocking parts.

[0041] Here, the original iron core is the prototype iron core used as the basis for designing the final iron core. That is, the original iron core serves as the reference core when designing an iron core including a flux-blocking section. For example, when determining the flux-blocking section through optimization calculations, the shape of the original iron core is used as the reference shape for evaluating the final iron core, and the shape and position of the flux-blocking section of that original iron core are optimized. Figure 1A and Figure 1B In the middle, the original iron core is Figure 1B The rotor core 102 is shown. In Figure 2A and Figure 2B In the middle, the original iron core is Figure 2B The rotor core 202 shown.

[0042] Furthermore, optimization, for example, refers to searching for solutions that satisfy the conditions used as the optimal solution in the optimization algorithm. In this case, the solution that satisfies the conditions can also be considered the optimal solution. Alternatively, the original core can be modified so that the designed core includes a flux-blocking section based on the optimal solution. Furthermore, for example, even if the conditions are not met, the original core can be modified so that the designed core includes a flux-blocking section based on the solution at a midpoint of the optimization process.

[0043] Based on the above understanding, the present inventors devised a method to calculate the distribution of an index that determines the ease of generating a magnetic flux-impeding portion in the design region of the original iron core, based on the distribution of magnetic properties (e.g., magnetic flux density), and to determine the region of the magnetic flux-impeding portion based on the distribution of this generation index. Hereinafter, the design region of the original iron core will be simply referred to as the design region. Furthermore, the index that determines the ease of generating a magnetic flux-impeding portion in the design region will be called the generation index.

[0044] By doing so, the locations where magnetic flux impediments are easily generated and those where they are difficult to generate can be quantified based on the distribution of the original core's magnetic properties. Therefore, for example, when determining the region of magnetic flux impediments by searching for the optimal solution, the search can be focused on the locations where changes in the characteristics of the device (e.g., a motor) increase, based on whether or not magnetic flux impediments are generated. Thus, the magnetic flux impediments that improve the core's characteristics can be determined without imposing a large computational load.

[0045] Here, the design area refers to the area where the iron core is designed. Furthermore, the design area is the region within the cut surface of the original iron core. The cut surface of the original iron core is a cut surface perpendicular to the direction of the top view of the flux obstruction. Hereinafter, this cut surface of the original iron core will also be simply referred to as the cut surface of the original iron core. Furthermore, the term "top view of the flux obstruction" refers to observing the flux obstruction in a manner that allows the entire flow of magnetic flux to be visualized at once, assuming that magnetic flux flows from the N pole (first pole) of the magnet positioned relative to the iron core (original iron core) to the S pole (second pole) of the same magnet, through the magnetic flux lines. In this case, the magnetic flux may be a portion of the magnetic flux flowing from the N pole (first pole) to the S pole (second pole) (it may be the magnetic flux within the visible range when the flux obstruction is observed). Furthermore, in this case, it is preferable to observe the flux obstruction from a position directly opposite it. For example, in the case of a radially gap type rotary motor, the direction of the top view of the flux obstruction is parallel to the rotation axis of the rotary motor. Furthermore, when the device is an axially gap type rotary motor, the direction of the magnetic flux blocking section when viewed from above is perpendicular to the rotation axis of the rotary motor (the radial direction of the rotary motor). When the device is a linear motor, the direction of the magnetic flux blocking section when viewed from above is perpendicular to the direction in which the linear motor moves (the direction of the moving magnetic field) and to the normal direction of the plane that is the path of the object including the linear motor. Furthermore, when the iron core is a laminated iron core, the direction of the magnetic flux blocking section when viewed from above is parallel to the lamination direction of the soft magnetic plates. In addition, the magnet provided in the iron core can be either a permanent magnet or an electromagnet.

[0046] The implementation described below is based on the above understanding and ideas. Furthermore, in the following description, the case where the aforementioned generation index is the generation probability of a magnetic flux obstruction section will be illustrated. However, the generation index is not limited to the generation probability of a magnetic flux obstruction section. For example, the generation index may be represented by a numerical value other than the generation probability. For example, the generation index may be represented by an integer value corresponding to the ease of generating a magnetic flux obstruction section. For example, the generation index may be represented by an integer value from 1 to 10. In this case, for example, the value of the generation index may be determined in such a way that a smaller value indicates a more difficult generation of a magnetic flux obstruction section.

[0047] (Iron core)

[0048] In the embodiments described below, the case where the core including the flux-blocking section is the rotor core included in an IPMSM (Interior Permanent Magnet Synchronous Motor) is illustrated. Therefore, an overview of the IPMSM will be provided.

[0049] Figure 3 This is a diagram illustrating an example of the configuration of the IPMSM300. In Figure 3 In this example, the permanent magnets serving as the magnetic poles of the rotor are configured in a "V" shape, a so-called "V"-shaped IPMSM. Furthermore, in Figure 3 The example shown is of the IPMSM300 (rotor 310) with 8 poles (the number of poles in the IPMSM300 is not limited). Figure 3 In the diagram, the range PR of the two arrow lines represents the portion constituting one pole of the IPMSM300. Furthermore, when the IPMSM300 (rotor 310) has n poles, it possesses a rotational symmetry relationship of nth order symmetry about its rotational axis O. n is an integer greater than or equal to 2. Figure 3 In the example shown, n is 8 (n = 8). Figure 3 This represents one of the four regions obtained by dividing a section perpendicular to the rotation axis O of the IPMSM300 into four equal parts. That is, Figure 3 This refers to the region within the IPMSM300 that constitutes the two poles of rotor 310. These four regions have a fourfold symmetry relationship with the rotational axis O of the IPMSM300 as the axis of rotational symmetry (4 = 8 poles ÷ 2). Therefore, in Figure 3 In the middle, by rotating around the center line of IPMSM300 as the axis of rotation 0, so that Figure 3The area shown is rotated 90° each time, thus obtaining the overall structure of the cross-section of the IPMSM300 when it is cut perpendicularly to the rotation axis O of the motor such as the IPMSM300. Hereinafter, this cross-section will also be referred to as the motor cross-section. The motor cross-section is an example of a cross-section in a direction perpendicular to the direction of the magnetic flux obstruction section when viewed from above.

[0050] exist Figure 3 In the IPMSM300, there are rotor 310 and stator 320.

[0051] The stator 320 includes a stator core 321 and stator coils (not shown). The stator 320 generates a rotating magnetic field. Additionally, in Figure 3 The stator coils included in the stator 320 are omitted from the diagram. The stator coils, not shown, are disposed in slots 322 of the stator core 321 (for ease of description, they are omitted from the diagram). Figure 3 (Only one slot is labeled in the attached diagram). The method of winding the stator coil is not limited. The stator coil can be wound in a distributed manner or in a concentrated manner.

[0052] Rotor 310 rotates about the rotation axis O of IPMSM300. Therefore, the rotation axis O of rotor 310 is aligned with the rotation axis O of IPMSM300.

[0053] The rotor 310 includes a rotor core 311 and multiple permanent magnets for each pole. Additionally, in... Figure 3 The example shown is the case where the number of permanent magnets per pole is 2 (refer to permanent magnets 312a to 312b). However, the number of permanent magnets per pole is not limited.

[0054] The rotor core 311 is made of a soft magnetic material. The rotor core 311 is constructed, for example, by stacking multiple electromagnet steel plates.

[0055] As mentioned earlier, in Figure 3 In the example shown, multiple permanent magnets 312a to 312b of each pole are disposed in the rotor core 311. Therefore, in the rotor core 311, multiple magnet holes are formed for each pole along a direction parallel to the rotation axis O of the rotor core 311. Hereinafter, the direction parallel to the rotation axis O of the rotor core 311 will also be referred to as the z-axis direction. This magnet hole is a through hole extending along the z-axis direction. Multiple permanent magnets 312a to 312b are respectively inserted into the magnet holes formed in the rotor core 311, thereby being disposed (embedded) within the rotor core 311. As described above, in Figure 3 The image shows the region of the IPMSM300 that constitutes the two poles of the rotor 310. Figure 3 The example shown illustrates the case where two permanent magnets 312a to 312b are embedded in each pole. Therefore, in Figure 3 The example shown illustrates a case where a total of 16 permanent magnets are embedded in the rotor core 311. Additionally, in... Figure 3 For ease of description, only the part constituting the 1 pole of the rotor 310 is labeled with reference numerals, and the reference numerals for the other 7 poles constituting the rotor 310 are omitted.

[0056] In the magnet holes formed in the rotor core 311, the spaces where permanent magnets 312a-312b are absent become flux blocking elements 313a-313d. Flux blocking elements 313a-313d are areas where magnetic flux cannot pass through, or areas where magnetic flux is difficult to pass through compared to the surrounding areas. Here, an example is given where there are no tangible objects in the flux blocking elements 313a-313d (i.e., an example where the flux blocking elements 313a-313d are voids (air regions)). However, the flux blocking portion is not limited to the flux blocking elements (voids). For example, a non-magnetic body may be provided in the flux blocking elements 313a-313d, which are voids. In this case, the non-magnetic body portion (the region of the non-magnetic body) is included in the flux blocking portion. When a non-magnetic body is provided in a portion of a magnetic flux blocking member, the member contains both a non-magnetic body portion and a gap portion. In this case, the non-magnetic body portion and the gap portion constitute a magnetic flux blocking portion. Alternatively, the non-magnetic body portion and the gap portion can be considered as a single magnetic flux blocking portion, or as separate magnetic flux blocking portions. Furthermore, besides the gap portion, the magnetic flux blocking portion can also be a portion where the steel plate is made thinner than other portions through stamping, thus impeding the flow of magnetic flux compared to other portions.

[0057] Furthermore, IPMSM itself can be a known IPMSM and is not limited to [specific types]. Figure 3 The IPMSM300 illustrated in .

[0058] Furthermore, the core including the flux-blocking portion is not limited to the rotor core of an IPMSM. For example, the core including the flux-blocking portion can also be the rotor core of a motor other than an IPMSM. For example, the permanent magnet may not be embedded in the rotor core. Furthermore, the core including the flux-blocking portion can also be the stator core. Thus, the core including the flux-blocking portion can be at least one of the rotor core and stator core of a rotating electric machine. The rotating electric machine can be either a motor or a generator. Furthermore, the rotating electric machine can be either a radially spaced rotating electric machine or an axially spaced rotating electric machine. In a radially spaced rotating electric machine, the rotor and stator are opposite each other in the radial direction of the rotating electric machine. In an axially spaced rotating electric machine, the rotor and stator are opposite each other in a direction parallel to the rotation axis of the rotating electric machine. Furthermore, the core including the flux-blocking portion can also be the core included in devices other than rotating electric machines. Devices other than rotating electric machines can be, for example, linear motors.

[0059] Furthermore, in this embodiment, the case where the flux blocking portion is a flux blocking member (gap portion) will be exemplified. However, the flux blocking portion is not limited to a flux blocking member (gap portion). For example, as described above, a non-magnetic body may also be provided in the flux blocking members 313a to 313d. That is, the flux blocking portion may also be a non-magnetic body provided in the hollow portion of the iron core. Thus, the flux blocking portion may also be a non-magnetic portion included in the iron core. The non-magnetic portion is, for example, a region occupied by at least one of air and a non-magnetic body. In addition, the flux blocking portion may also be a region in a soft magnetic material to which compressive residual stress is imparted. For example, when an iron core is constructed by bonding multiple soft magnetic plates with an adhesive, the adhesive is applied to the surface of the soft magnetic plates. Compressive residual stress is imparted to the region directly below the region to which the adhesive is applied and to its periphery. In addition, when multiple soft magnetic plates are joined by riveting, compressive residual stress is imparted to the riveting region and its periphery. These regions may also be flux blocking portions.

[0060] As described above, the flux-blocking portion can also be constructed, for example, by making a portion of the iron core (a portion of the soft magnetic material) a non-magnetic region. The non-magnetic region is, for example, a region occupied by at least one of air and a non-magnetic body. Furthermore, the flux-blocking portion can also be constructed, for example, by imparting residual stress to a portion of the iron core (a portion of the soft magnetic material).

[0061] (Processing apparatus and processing method)

[0062] Figure 4 This is a diagram illustrating an example of the functional configuration of the processing device 410. Figure 5This is a flowchart illustrating an example of a processing method performed using processing device 410. Processing device 410 includes, for example, one or more hardware processors and one or more memories as hardware. Processing device 410 executes one or more programs stored in the memories using one or more hardware processors, thereby performing various operations. The hardware processors can be, for example, a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit). Alternatively, processing device 410 may include both a CPU and a GPU. Furthermore, the memories can be, for example, RAM (Random Access Memory) or ROM (Read Only Memory). Alternatively, processing device 410 may include both RAM and ROM. Furthermore, processing device 410 may include storage media other than RAM and ROM. Additionally, processing device 410 may also be implemented using dedicated hardware such as an ASIC (Application Specific Integrated Circuit).

[0063] Input processing device 420 is a device for inputting various types of information into processing device 410. For example, input processing device 420 may also include a user interface. In this case, input processing device 420 may include, for example, a keyboard and a mouse. Furthermore, input processing device 420 may also include an information processing device (computer) other than processing device 410. The number of input processing devices 420 can be one or more. Additionally, at least one of the input processing devices 420 may be an internal device of processing device 410.

[0064] The output processing device 430 is a device that performs processing based on information output from the processing device 410. For example, the output processing device 430 may also include a computer display. Furthermore, the output processing device 430 may also include an information processing device (computer) other than the processing device 410. Additionally, the output processing device 430 may also be a device used for manufacturing iron cores. The number of output processing devices 430 can be one or more. Furthermore, at least one of the output processing devices 430 may be a device internal to the processing device 410.

[0065] The communication between the input processing device 420 and the output processing device 430 and the processing device 410 can be either wired or wireless.

[0066] Next, an example of the processing performed by the processing device 410 will be described. In this embodiment, the processing device 410 is used to perform processing for designing a rotor core including a flux blocking element.

[0067] exist Figure 4 In this embodiment, the processing apparatus 410 is exemplified by including an acquisition unit 411, a distribution calculation unit 412, an index calculation unit 413, a decision unit 414, and an output unit 415.

[0068] <Acquisition Section 411, Steps S501, S504>

[0069] The acquisition unit 411 acquires prerequisite information PI (steps S501, S504). Prerequisite information PI is information indicating the prerequisite conditions for the processing device 410 to generate a flux-blocking component (in this embodiment, a flux-blocking member). In other words, prerequisite information PI is information that needs to be set in advance in the processing device 410 for generating the flux-blocking component. The content of prerequisite information PI is determined, for example, by the designer of the device (in this embodiment, an IPMSM). In the following description, the designer of the device will also be referred to simply as the designer. Furthermore, in the following description, the designer may be interchanged with the operator of the processing device 410. Prerequisite information PI includes, for example, operating condition information, configuration condition information, analysis condition information, and area condition information. In this embodiment, the acquisition unit 411 acquires operating condition information, configuration condition information, and analysis condition information in step S501, and acquires area condition information in step S504.

[0070] Operating condition information refers to information about conditions related to the operation of the equipment being designed. As mentioned earlier, in this embodiment, the equipment is an IPMSM (Integrated Power Mechanism). In this case, the operating condition information includes, for example, the amplitude of the stator current (excitation current), the angle of attack of the IPMSM, and the rotational speed of the IPMSM. Furthermore, in this embodiment, the processing device 410 performs electromagnetic field analysis. The acquisition unit 411 sets the conditions related to the operation of the equipment during electromagnetic field analysis based on the operating condition information. The acquisition unit 411 sets these conditions, for example, by storing information about the set object in a storage medium.

[0071] Configuration condition information is information used to determine the conditions related to the configuration of a device including a raw iron core. This configuration condition information includes, for example, the number, location, size, shape, and material (physical property values, etc.) of the constituent components. In this embodiment, the constituent components include, for example, a rotor core, a permanent magnet, a stator core, and stator coils. Furthermore, a specific example of a raw iron core is... Figure 3The rotor core 311 is shown. Additionally, as previously mentioned, in... Figure 3 The example shown illustrates a rotor core 311 including flux blocking elements 313a to 313d. Thus, the original core may also include flux blocking elements. However, the original core may also not include flux blocking elements.

[0072] In this embodiment, the configuration of the motor cross-section in the IPMSM remains unchanged in the height direction (z-axis direction). Therefore, in this embodiment, a two-dimensional analysis of the motor cross-section is performed as an electromagnetic field analysis. Thus, the configuration condition information includes, for example, information indicating the area (coordinate range) occupied by each component of the IPMSM in the coordinate plane. However, as an electromagnetic field analysis, a three-dimensional analysis including the height direction (z-axis direction) can also be performed. In this case, the aforementioned configuration condition information includes, for example, information indicating the area (coordinate range) occupied by each component of the IPMSM in the coordinate space. In this embodiment, the area for electromagnetic field analysis is an example of a design area. The design area is the design target area of ​​the core. Specifically, in this embodiment, the design area is an example of the area of ​​the motor cross-section of the IPMSM300. The design area may, for example, be the entire motor cross-section of the IPMSM300. However, as mentioned above, in this embodiment, the IPMSM300 has rotational symmetry. Therefore, regarding the design region, when it is, for example, a region within the region of the IPMSM300 that includes the region constituting the one pole of the rotor 310, it may not be the entire region of the IPMSM300. The acquisition unit 411 sets the design region based on the configuration condition information.

[0073] Analysis condition information is information related to the conditions of electromagnetic field analysis. This information may include, for example, the location, size, and shape of small regions (grids). These small regions (grids) are, for example, defined within a region of the IPMSM defined in the coordinate plane (or coordinate space). The acquisition unit 411 sets the grid for the design area based on the analysis condition information. Furthermore, based on the configuration condition information, the acquisition unit 411 sets the physical property values, etc., of the region corresponding to each grid.

[0074] The region condition information is information relating to the conditions of the region where a magnetic flux blocking part (in this embodiment, a magnetic flux blocking member) is generated. The region condition information is sufficient to determine the region where the generation of a magnetic flux blocking part is permitted. The region condition information may also include information indicating the region where the generation of a magnetic flux blocking part is permitted. For example, the region condition information may include the coordinates of the region where the magnetic flux blocking part is permitted within the coordinates of the original iron core. Furthermore, the region condition information may include information indicating the region where the generation of a magnetic flux blocking part is prohibited (hereinafter, the region where the generation of a magnetic flux blocking part is prohibited will also be referred to as the prohibited region). In this case, the region outside the prohibited region within the region occupied by the original iron core is determined as the region where the generation of a magnetic flux blocking part is permitted (hereinafter, the region where the generation of a magnetic flux blocking part is permitted will also be referred to as the permitted region). For example, the region condition information may include the coordinates of the prohibited region within the coordinates of the original iron core. The prohibited region can be determined by constituting the condition information. The prohibited region is, for example, the region occupied by the permanent magnet. Therefore, such a region may not be determined based on the region condition information.

[0075] In this embodiment, the following case is illustrated: the distribution of magnetic properties in the original iron core is calculated by the distribution calculation unit 412 (described later), and information for determining the distribution of magnetic properties is output by the output unit 415 (also refer to steps S502 and S503). Therefore, in this embodiment, the case where the designer determines the area condition information by referring to the distribution of magnetic properties in the original iron core is illustrated. Therefore, in this embodiment, the case where the acquisition unit 411 acquires the area condition information in step S504 and sets the permissible area based on the area condition information is illustrated. However, it is not necessarily necessary to do so. For example, the designer may determine the area condition information without referring to the distribution of magnetic properties in the original iron core. For example, the area condition information may be information indicating that the area in the area of ​​the original iron core where the representative value of the magnetic flux density in one period is below a threshold is set as a permissible area. In this case, the acquisition unit 411 may, for example, acquire the area condition information in step S501. In addition, the period here is a time period. Furthermore, the representative value may, for example, be the time average value, effective value, and maximum value of the absolute value of the instantaneous value.

[0076] Based on regional condition information, it is possible to suppress the generation of flux-impeding portions at locations where their contribution to the characteristics of the core and equipment is significantly small. For example, it is possible to suppress the generation of flux-impeding portions near the inner circumferential surface 314 of the rotor core 311. Therefore, the computational load can be further reduced.

[0077] As described above, this embodiment illustrates the case where the acquisition unit 411 acquires region condition information. However, the acquisition unit 411 may also choose not to acquire region condition information. For example, if the region is any region of the original iron core that the magnetic flux blocking part can occupy, and the magnetic flux blocking part can be located in any region, the acquisition unit 411 may choose not to acquire region condition information.

[0078] Furthermore, the timing at which the acquisition department 411 acquires the various prerequisite information PIs (operational condition information, composition condition information, analysis condition information, and regional condition information) can be either different or the same.

[0079] Furthermore, in this embodiment, an example is shown where the input processing device 420 includes a user interface. In this case, the designer inputs prerequisite information PI to the input processing device 420 by operating the input processing device 420. However, as mentioned above, the input processing device 420 is not limited to a device that includes a user interface.

[0080] <Distribution calculation unit 412, output unit 415, steps S502 to S503>

[0081] Based on the results of electromagnetic field analysis for the design region, the distribution calculation unit 412 calculates the distribution of magnetic properties in the original iron core (step S502). As mentioned earlier, the design region is the region in the cut surface of the original iron core (specifically, the motor cross-section). In the case where the design region is the region constituting one pole of the rotor 310 within the motor cross-section of the IPMSM300, the distribution of magnetic properties in the one pole is rotated 360 / n° around the rotation axis O of the IPMSM300, thereby obtaining the overall distribution of magnetic properties of the motor cross-section of the IPMSM300. Furthermore, as mentioned earlier, n is the number of poles of the IPMSM300 (rotor 310).

[0082] Before the processing in step S502 begins, if the acquisition unit 411 acquires the area condition information, the distribution calculation unit 412 calculates the distribution of magnetic properties in the areas of the design area that include the permitted areas determined based on the area condition information. The distribution calculation unit 412 can calculate the distribution of magnetic properties in only the permitted areas of the design area, or it can calculate the distribution of magnetic properties in the entire design area.

[0083] Magnetic properties are physical quantities obtained, for example, from magnetization curves. Specifically, a magnetic property can be any one of magnetic flux density, magnetic field strength, and permeability. Furthermore, the value of a magnetic property can be a representative value over a period of time. This period is the time period. Additionally, the representative value can be, for example, the time average, effective value, or maximum value of the absolute value of an instantaneous value. Furthermore, a magnetic property can also be, for example, iron loss.

[0084] In this embodiment, the case where the magnetic property is the time average of the absolute value of the instantaneous value of the magnetic flux density is illustrated. In the following description, the time average of the absolute value of the instantaneous value of the magnetic flux density will be simply referred to as the time average of the magnetic flux density, as needed.

[0085] For example, in the original iron core as Figure 3 In the case of the rotor core 311 shown, the distribution calculation unit 412 performs electromagnetic field analysis based on the premise information PI, thereby using the instantaneous values ​​at each location in the design area of ​​the IPMSM300 as a reference. Figure 3 The instantaneous values ​​of magnetic flux density and magnetic field strength are calculated when the IPMSM300 is energized. In this embodiment, the case where the distribution calculation unit 412 performs electromagnetic field analysis (numerical calculation) is illustrated, so each position is represented as a discretized position. Specifically, each position is represented, for example, by the position of a representative point of a grid (e.g., the position of a vertex or the position of the center, etc., which are arbitrarily determined in advance). However, each of the above positions may also be the representative positions of a predetermined number of grids of 2 or more.

[0086] Furthermore, electromagnetic field analysis is performed by solving Maxwell's equations using known quantitative methods such as the finite element method. In the case of electromagnetic field analysis based on the finite element method, for example, the instantaneous values ​​of magnetic flux density and magnetic field strength are calculated as instantaneous values ​​of the positions of representative points in each grid. The distribution calculation unit 412 can calculate the time average value of the magnetic property over one period by using the instantaneous values ​​of a periodic quantity as the instantaneous values ​​of magnetic flux density and magnetic field strength. Since the method of electromagnetic field analysis itself is a general method, its detailed explanation is omitted here.

[0087] As described above, in this embodiment, we illustrate a case where the designer sets the regional condition information by referring to the distribution of magnetic properties in the original iron core. Therefore, the output unit 415 outputs information that determines the distribution of magnetic properties in the original iron core (in this embodiment, the distribution of the time average value of magnetic flux density) (step S503). Hereinafter, the information that determines the distribution of magnetic properties in the original iron core will also be referred to as magnetic distribution information MP.

[0088] In this embodiment, the case where the output unit 415 outputs magnetic distribution information MP to the output processing device 430 is illustrated. Furthermore, in this embodiment, the case where the output processing device 430 includes a computer display is illustrated. In this case, the magnetic distribution information MP output from the output unit 415 is displayed on the computer display. However, as mentioned above, the output processing device 430 is not limited to a device that includes a computer display.

[0089] The designer determines the permitted area by referring to the magnetic distribution information MP output by the output unit 415. In this case, the acquisition unit 411 acquires the area condition information used to determine the permitted area determined by the designer (step S504).

[0090] As described above, in this embodiment, the distribution calculation unit 412 calculates the distribution of magnetic properties in the original iron core. However, the processing device 410 (distribution calculation unit 412) may not necessarily need to calculate the distribution of magnetic properties in the original iron core. For example, if there is a known distribution of magnetic properties in the original iron core, the processing device 410 (acquisition unit 411) can also acquire information representing that known distribution. In this case, the processing step S502 (calculation of the distribution of magnetic properties) may not be performed. Instead, for example, before the processing in step S505 begins, the acquisition unit 411 can acquire the known information as magnetic distribution information MP.

[0091] Furthermore, as mentioned above, the acquisition unit 411 may not acquire the region condition information. That is, the processing in step S504 may not be performed. If the processing in step S504 is not performed, the processing in step S503 (output of magnetic distribution information MP) may also not be performed.

[0092] <Indicator Calculation Section 413, Step S505>

[0093] The index calculation unit 413 calculates a distribution of generation indices representing the ease of generating magnetic flux obstruction parts in the design area based on the distribution of magnetic properties in the design area (step S505). The distribution of generation indices is sufficient to determine the extent to which each position of the iron core of the design object is likely to become a magnetic flux obstruction part. As mentioned above, in this embodiment, the case where such generation indices are the distribution of the generation probability of magnetic flux obstruction parts in the design area is exemplified. Hereinafter, the distribution of the generation probability of magnetic flux obstruction parts in the design area will also be simply referred to as the distribution of generation probability. The distribution of generation probability is sufficient to determine the probability at which each position of the iron core of the design object will become a magnetic flux obstruction part. The distribution of generation probability can be a continuous probability distribution, a discrete probability distribution, or a probability density function. In this embodiment, the case where the index calculation unit 413 calculates the distribution of generation probability based on the magnetic distribution information MP using a probability density function is exemplified. Furthermore, it is preferable that the iron core of the design object and the original iron core differ only in the magnetic flux obstruction part (in this embodiment, a magnetic flux blocking element).

[0094] As explained in the (Understanding and Ideas) section, it is preferable to make it easier for magnetic flux blocking portions (in this embodiment, magnetic flux blocking elements (gap portions)) to exist in the original iron core at locations with high magnetic flux density. Furthermore, it is preferable to make it difficult for magnetic flux blocking portions to exist in the original iron core at locations with low magnetic flux density. Therefore, the index calculation unit 413 may calculate the distribution of generation probability in a way that the generation probability of magnetic flux blocking portions is positively correlated with the magnetic flux density of the original iron core (in this embodiment, the time average of the magnetic flux density). That is, the generation probability of a magnetic flux blocking portion at a certain location may be higher if the magnetic flux density at that location in the original iron core is higher. For example, the generation probability of magnetic flux blocking portions at each location within the iron core of the design object may be either a probability proportional to the magnetic flux density at that location in the original iron core, or a probability proportional to the square of the magnetic flux density at that location.

[0095] Alternatively, at all locations within the design area of ​​the core of the design object (e.g., the locations of representative points of all grids), the probability of generating a magnetic flux obstruction is not positively correlated with the magnetic flux density of the original core (in this embodiment, the time-averaged magnetic flux density). For example, the index calculation unit 413 may set the generation probability of locations where the magnetic flux density of the original core (in this embodiment, the time-averaged magnetic flux density) is below a first threshold to a predetermined value (e.g., 0%) that is smaller than other generation probabilities set for locations where the magnetic flux density exceeds the first threshold. Furthermore, for example, the index calculation unit 413 may set the generation probability of locations where the magnetic flux density exceeds a second threshold to a predetermined value (e.g., 90%) that is higher than other generation probabilities set for locations where the magnetic flux density is below the second threshold, but smaller than 100%. A combination of these is also possible, in which case the first threshold ≤ the second threshold. As described above, the index calculation unit 413 may calculate the distribution of the generation probability of the magnetic flux obstruction part in such a way that the generation probability of the magnetic flux obstruction part is positively correlated with the magnetic flux density of the original iron core in at least a portion of the distribution. Alternatively, the index calculation unit 413 may calculate the distribution of the generation probability of the magnetic flux obstruction part in such a way that the generation probability of the magnetic flux obstruction part is positively correlated with the magnetic flux density of the original iron core in the entire distribution. Furthermore, the location where the generation probability is calculated may not be the same as the location where the electromagnetic field analysis is performed. In this case, for example, the generation probability may be calculated for each predetermined number of adjacent grids in a grid set relative to the design area for electromagnetic field analysis. Alternatively, the predetermined number may be set individually based on the location, etc., within the design area.

[0096] In the following explanation, the information that can determine the distribution of the generation probability calculated by the index calculation unit 413, as described above, will also be referred to as probability distribution information GP.

[0097] <Decision Unit 414, Output Unit 415, Steps S505-S506>

[0098] Based on the distribution of generation probabilities, the decision unit 414 determines the region of the flux-blocking part in the design region (step S505). Hereinafter, the region of the flux-blocking part in the design region will also be simply referred to as the region of the flux-blocking part. The information of the region of the flux-blocking part determined by the decision unit 414 only needs to be information that can determine the area occupied by the flux-blocking part (in this embodiment, a flux-blocking member) in the iron core. The number of regions of the flux-blocking part determined by the decision unit 414 can be one or more. When a permissible region is set, the decision unit 414 determines the region of the flux-blocking part within the permissible region. That is, the decision unit 414 determines the region of the flux-blocking part in such a way that the entire region of the flux-blocking part is included within the permissible region. In other words, if at least a portion of the region of the flux-blocking part is outside the permissible region, the decision unit 414 will not determine that region of the flux-blocking part as the region of the flux-blocking part. However, for example, the decision unit 414 may also determine that the region of the flux-blocking part, excluding the region outside the permissible region, is the region of the flux-blocking part.

[0099] The decision unit 414 samples points in the design area (e.g., the positions of representative points of the grid) based on, for example, the distribution of generation probabilities. Preferably, the sampling method makes it easier to sample locations with higher generation probabilities. As mentioned earlier, the distribution of generation probabilities is calculated in such a way that the generation probability of the magnetic flux blocking part is positively correlated with the magnetic flux density of the original iron core (in this embodiment, the time average of the magnetic flux density). Therefore, by making it easier to sample locations with higher generation probabilities, locations with higher magnetic flux density of the original iron core become easier to sample. Furthermore, locations with lower magnetic flux density of the original iron core become difficult to sample. Sampling can be performed, for example, by the Markov chain Monte Carlo method or by elimination sampling. For example, the distribution of the objects being sampled can be the generation probability distribution itself or a distribution based on the generation probability distribution. In addition, the Markov chain Monte Carlo method and elimination sampling are general methods, so their detailed description is omitted here. Furthermore, the sampling method can also be other than the Markov chain Monte Carlo method and elimination sampling. In this embodiment, the following case is illustrated: the decision unit 414 samples the position inside the core of the design object from the distribution of generation probabilities using the Markov chain Monte Carlo method.

[0100] Figure 6This is a diagram illustrating an example of sampling results in the region constituting one pole of the rotor core. The original core is... Figure 3 The rotor core 311 shown has the same configuration. Figure 6 In this context, a higher concentration in a region indicates a greater number of samples per unit area. For example... Figure 6 As shown, it can be seen that the outer periphery of the rotor core (the area near where permanent magnets 312a to 323b are located) is sampled more frequently.

[0101] Alternatively, the decision unit 414 may directly select all or part of the sampled multiple points (positions) as the region of the flux-impeding section. Furthermore, if the decision unit 414 has sampled multiple adjacent points, it may select those points as the region of a single flux-impeding section. Alternatively, the decision unit 414 may select a region of flux-impeding sections with a predetermined shape and size, including the sampled points. In this case, the decision unit 414 may select a region of flux-impeding sections with a predetermined shape and size, using the sampled points as representative points. The position of the representative point is, for example, the centroid (or center of gravity) of the flux-impeding section. When a permissible region is defined, the decision unit 414 may sample only the positions within the permissible region or sample the entire design region. When sampling the entire design region, the decision unit 414 may, for example, discard flux-impeding sections that include areas not within the permissible region. Furthermore, if the decision unit 414 includes a region that is not permitted within a portion of the flux-blocking section, it may also select a region other than that portion as a flux-blocking section. In this embodiment, the region selected as a flux-blocking section as described above is an example of a selection region chosen from the design area.

[0102] Alternatively, the decision unit 414 may determine the region selected as described above as the region of the flux obstruction section. However, in this embodiment, the following case is illustrated: the decision unit 414 determines the region of the flux obstruction section based on the probability distribution information GP, ​​in order to further improve the characteristics of the core and device (in this embodiment, the rotor core and IPMSM) of the design object. Figure 7 This diagram illustrates an example of a method for determining the region of magnetic flux obstruction. Figure 7 In the example, the original iron core 711 is shown as... Figure 3 The rotor core 311 shown is as follows.

[0103] First, the decision unit 414 selects a region from the design region of the original core 711 that contains points sampled based on probability distribution information (GP). Then, the decision unit 414 generates an evaluation core 721 that includes a magnetic flux blocking portion (in this embodiment, a magnetic flux blocking element) in the selected region.

[0104] Then, the decision unit 414 calculates the characteristic values ​​of the device including the evaluation core 721, and determines the region of the magnetic flux blocking section in the design area based on the calculated characteristic values. In this embodiment, an example is given where, in order to calculate the characteristic values ​​of the device including the evaluation core 721, the decision unit 414 performs an electromagnetic field analysis on the evaluation core 721. In this case, the decision unit 414 determines the region of the magnetic flux blocking section based on the results of the electromagnetic field analysis. Furthermore, the characteristic values ​​of the device can be, for example, values ​​representing the characteristics of the device. The characteristics of the device can also be, for example, characteristics representing the performance of the device.

[0105] Here is a specific example of the processing of the decision unit 414 when performing electromagnetic field analysis on the evaluation core 721. First, the decision unit 414 selects candidate regions for the magnetic flux blocking section by using points sampled based on probability distribution information GP as representative points. As mentioned earlier, the location of the representative point is, for example, the centroid (or center of gravity) of the magnetic flux blocking section. When a permissible region is set as described above, the decision unit 414 can sample only the locations within the permissible region or sample the entire design region.

[0106] For example, the determination unit 414 may use a method improved from the method described in Patent Document 1 to determine the region of the magnetic flux blocking section. In the method described in Patent Document 1, the region of the basic shape of the magnetic flux blocking member is set within the design region. For example, the determination unit 414 may use a method improved from the method described in Patent Document 1 to determine the region of the magnetic flux blocking section. Figure 7 In the design area of ​​the original iron core 711 shown, excluding the permanent magnets 713aa~713e and the flux blocking elements 712a~612h, a circular area is set as the basic shape of the flux blocking element. This area can be one or more. Furthermore, the basic shape can also be a shape other than a circle. Alternatively, it can be... Figure 7 The regions of the magnetic flux blocking elements 712a to 712h shown are taken as the regions of the basic shape of the magnetic flux blocking elements. Then, the determination unit 414 calculates the optimal solution for the mapping implemented for the regions of the basic shape of the magnetic flux blocking elements using an optimization algorithm. At this time, the determination unit 414 uses the characteristic values ​​of the equipment, such as the average torque of the rotor, as the value of the objective function.

[0107] When the optimal solution for mapping the region of the basic shape of the flux blocking element is calculated using metaheuristics such as genetic algorithms, the decision unit 414 calculates candidate solutions for this mapping. Hereinafter, the optimal solution and candidate solution for mapping the region of the basic shape of the flux blocking element will be simply referred to as the optimal solution and candidate solution, respectively. The decision unit 414 performs a mapping represented by the candidate solutions for the region of the basic shape of the flux blocking element, thereby generating the flux blocking element. The number of flux blocking elements can be one or more. When there are multiple flux blocking elements, there can also be multiple candidate solutions. In this case, the decision unit 414 may select candidate solutions corresponding to each of the multiple flux blocking elements. Furthermore, in this case, the decision unit 414 may perform a mapping represented by the candidate solutions corresponding to the basic shape of the flux blocking element for the region of the basic shape of the flux blocking element.

[0108] For example, in Figure 7 In this process, the decision unit 414 sets the region of the flux blocking elements 712a to 712h within the region of the original iron core 711 as the region of the basic shape of the flux blocking elements. The decision unit 414 performs a mapping represented by candidate solutions for this basic shape of the flux blocking elements, thereby generating an evaluation iron core 721. Figure 7 As a result of implementing such mapping, an example is shown where flux blocking elements 712a-722g and 732a-732e are generated. In this case, the regions of flux blocking elements 722a-722e and 732a-732e are examples of selected regions.

[0109] The decision unit 414 generates an evaluation core, which includes one or more flux blocking elements that have been mapped as described above. Figure 7 In the process, the decision unit 414 generates evaluation cores 721 and 731. Then, the decision unit 414 calculates the value of the objective function by calculating the characteristic value of the IPMSM including the evaluation core 721. Based on the value of the objective function calculated in this way, the decision unit 414 updates the candidate solutions according to an optimization algorithm such as a genetic algorithm. In addition, the optimization algorithm can be either a metaheuristic or other algorithms. The optimal solution is calculated by repeatedly updating the candidate solutions in this way until the convergence condition is met. In the design area of ​​the original core 711, the decision unit 414 performs a mapping represented by the optimal solution for the area of ​​the basic shape of the magnetic flux blocking element, thereby determining the area of ​​the magnetic flux blocking element.

[0110] exist Figure 7In the example below, the following case illustrates a scenario: In the design region of the original core 711, a mapping represented by the optimal solution is applied to the region of the flux blocking elements 712a to 712h (the region of the basic shape of the flux blocking elements), thereby generating flux blocking elements 732a to 732e. Alternatively, in this case, flux blocking elements 722a to 722e are generated by applying a mapping represented by a candidate solution other than the optimal solution to the region of the flux blocking elements 712a to 712h.

[0111] As described above, it is preferable that if the optimal solution is calculated by solving the optimal solution problem, a core with better characteristic values ​​for the device can be designed. However, the decision unit 414 may not necessarily need to solve the optimal solution problem. For example, the designer may trial-and-error vary the design variables. In this case, the decision unit 414 may search for design variables from the design variables specified by the designer that satisfy predetermined conditions for the characteristic values ​​of the device. The predetermined conditions may, for example, be that the characteristic value of the device is better than a predetermined value.

[0112] For example, the decision unit 414 may calculate an initial candidate solution in the method described in the above-mentioned Patent Document 1, in a manner in which the position of the representative point of the magnetic flux blocking member is obtained by mapping the region of the basic shape of the magnetic flux blocking member, and the position of the point sampled as described above.

[0113] Alternatively, the decision unit 414 may calculate the updated candidate solution in such a way that the position of the representative point of the flux blocking element becomes the position of the point sampled as described above when the mapping represented by the updated candidate solution is implemented during the update of the candidate solution.

[0114] The decision unit 414 can calculate both the initial candidate solution and the updated candidate solution as described above, or it can calculate only one of them as described above.

[0115] When done as described above, according to the distribution of generation probabilities, locations that have a greater impact on the characteristics of the core and equipment become easier to calculate as representative points of the flux blocking element. Conversely, locations that have a smaller impact on the characteristics of the core and equipment become more difficult to calculate as representative points of the flux blocking element. Therefore, the computational load can be reduced, and the probability that the sampled point is included in the flux blocking section can be increased.

[0116] Furthermore, in the method described in Patent Document 1, for example, the shape of the flux blocking element is changed by mapping the shape of the basic region of the flux blocking element. Also, in the method described in Patent Document 1, for example, mapping is performed on the region of the basic shape of the flux blocking element, resulting in a situation where one flux blocking element is separated into multiple flux blocking elements. In this case, the number of flux blocking elements increases, and therefore, additional flux blocking elements are added. On the other hand, there is a situation where multiple flux blocking elements are integrated into one flux blocking element. In this case, the number of flux blocking elements decreases. Furthermore, in the method described in Patent Document 1, the flux blocking element may or may not be present in the original iron core. If the flux blocking element is not present in the original iron core, for example, a flux blocking element is added to the original iron core by adding a region of the basic shape of the flux blocking element. Alternatively, if the flux blocking element is present in the original iron core, the region of that flux blocking element can be used as the region of the basic shape of the flux blocking element. Furthermore, for example, mapping is performed on the region of the basic shape of the flux blocking element, resulting in the elimination of the flux blocking element when the entire flux blocking element is located outside the design region. In the case of using the method obtained by modifying the method described in Patent Document 1 as described above, the decision unit 414 performs at least one of adding, changing, or deleting the flux blocking element relative to the original iron core.

[0117] Furthermore, for example, the determination unit 414 may determine the region of the flux obstruction unit using a method modified from that described in Non-Patent Document 1. In the method described in Non-Patent Document 1, the output y(x) of the NGnet in a certain grid... e If the value is 0 or higher, the grid's state is set to "on". e This represents the centroid position of the grid. On the other hand, the output y(x) of NGNet within a given grid... e When the value is less than 0, the state of the grid is set to "off". Additionally, in Non-Patent Document 1, the grid is referred to as a cell.

[0118] For example, in the method described in Non-Patent Document 1 above, the decision unit 414 may, based on whether the grid is a grid sampled as described above, determine the output y(x) of the NGnet in each grid. e The threshold corresponding to ) is changed. For example, the decision unit 414 may also change the threshold corresponding to the NGnet output y(x) in the sampled grid. e The threshold corresponding to ) becomes more than the NGnet output y(x) in the unsampled grid. e The threshold corresponding to ) is smaller. Alternatively, the decision unit 414 may use the NGnet output y(x) in the sampled grid.e Add a positive real number to ). Alternatively, the output y(x) of the NGnet in the unsampled grid can be determined by the decision unit 414. e Add a negative real number to the weighting coefficients of the normalized Gaussian function. Alternatively, the decision unit 414 may perform both the addition of positive and negative real numbers. Alternatively, the decision unit 414 may multiply the weighting coefficients of the normalized Gaussian function by a positive or negative real number. For example, if the value of the normalized Gaussian function corresponding to the unsampled grid is positive, the decision unit 414 may multiply the weighting coefficients by a negative real number. If the value of the normalized Gaussian function corresponding to the unsampled grid is negative, the decision unit 414 may also multiply the weighting coefficients by a positive real number. Furthermore, if the value of the normalized Gaussian function corresponding to the sampled grid is positive, the decision unit 414 may also multiply the weighting coefficients by a positive real number. If the value of the normalized Gaussian function corresponding to the sampled grid is negative, the decision unit 414 may also multiply the weighting coefficients by a negative real number. Furthermore, as explained in the background section, in the method described in Non-Patent Document 1, the weighting coefficients for the normalized Gaussian function are the design variables. Therefore, by multiplying the weighting coefficients for the normalized Gaussian function by a positive or negative real number, the design variables are changed.

[0119] The decision unit 414 can perform all of the following: change the threshold, add positive real numbers, and multiply positive or negative real numbers, or perform one or two of them.

[0120] Even if the above is done, it is similar to the improvement on the method described in Patent Document 1. According to the distribution of generation probability, the more a position has a greater impact on the characteristics of the core and the equipment, the easier it becomes to calculate as a position of the magnetic flux blocking element (i.e., it becomes easier to be in the "on" state). Conversely, the less a position has an impact on the characteristics of the core and the equipment, the more difficult it becomes to calculate as a position of the magnetic flux blocking element (i.e., it becomes easier to be in the "off" state). Therefore, it is possible to reduce the computational load and increase the probability that the sampled point is included in the magnetic flux blocking part.

[0121] Alternatively, as an improvement on the method described in Non-Patent Document 1, a method that does not perform sampling may also be used. For example, the determination unit 414 may determine the output y(x) of the NGnet in each grid based on the generation probability value in each grid. e The threshold corresponding to the generation probability is changed. In this case, for example, the decision unit 414 may reduce the threshold more for grids with higher generation probabilities. Alternatively, for example, the decision unit 414 may adjust the NGnet output y(x) in each grid based on the generation probability value. eAdd a positive or negative real number to ) . In this case, it is also possible that the higher the generation probability, the more the decision part 414 makes the NGnet output y(x) more consistent with the output y(x) e The positive real number added to ) becomes a larger value. Alternatively, the lower the generation probability, the more the decision part 414 makes the output y(x) of NGnet larger. e The absolute value of the negative real number added to the function increases. Alternatively, the decision unit 414 may multiply the weighting coefficients of the normalized Gaussian function by a positive or negative real number.

[0122] Furthermore, by performing electromagnetic field analysis on the evaluation cores 721 and 731 as described above, and thereby calculating the characteristic values ​​of the device including the evaluation cores 721 and 731, the characteristic values ​​of the device can be easily and accurately calculated, which is therefore preferred. However, it is also possible that the characteristic values ​​of the device including the evaluation cores 721 and 731 are not calculated by performing electromagnetic field analysis on the evaluation cores 721 and 731. For example, the determination unit 414 may calculate the characteristic values ​​of the device using a learned model (machine learning model) that has learned the relationship between the image including the magnetic flux blocking section and the characteristic values ​​of the device. Alternatively, the determination unit 414 may calculate the characteristic values ​​of the device using the equivalent circuit method, etc. The equivalent circuit method is a method of calculating the characteristic values ​​of the device using the equivalent circuit of the device. The equivalent circuit is represented by, for example, resistance, inductance, and electromotive force. Furthermore, the equivalent circuit may also be represented using capacitance.

[0123] In the following explanation, the information that enables the determination of the region of the magnetic flux obstruction section as described above by the determination unit 414 will also be referred to as obstruction section information MO.

[0124] Output unit 415 outputs obstruction information MO (step S506). In this embodiment, the case where output unit 415 outputs obstruction information MO to output processing device 430 is exemplified. Furthermore, as mentioned above, in this embodiment, the case where output processing device 430 includes a computer display is exemplified. In this case, the obstruction information MO output from output unit 415 is displayed on the computer display.

[0125] Alternatively, the designer can design the core (in this embodiment, a rotor core) based on the obstruction information MO. In this case, the designer determines the number, location, shape, and size of the magnetic flux obstructions (in this embodiment, magnetic flux blocking elements) based on the magnetic flux obstruction information MO. Alternatively, the information required to manufacture the magnetic flux obstructions may include information related to the manufacturing method of the magnetic flux obstructions.

[0126] The designer only needs to design an iron core that includes a flux-blocking part in all or part of the region of at least one flux-blocking part as defined by the flux-blocking part information MO. That is, the designer can design an iron core that includes a flux-blocking part in all or part of the region of all flux-blocking parts as defined by the flux-blocking part information MO, or the designer can design an iron core that includes a flux-blocking part in all or part of the region of a portion of the region of all flux-blocking parts as defined by the flux-blocking part information MO. For example, the designer can also use the flux-blocking part itself as defined by the flux-blocking part information MO. Furthermore, the designer can also modify the flux-blocking part as defined by the flux-blocking part information MO. For example, if the shape of the flux-blocking part as defined by the flux-blocking part information MO is not smooth, the designer can modify the flux-blocking part to make its shape smoother in order to facilitate its manufacture. In this case, the ratio of the volume (or area) of the corrected flux-blocking portion to the volume (or area) of the original flux-blocking portion is preferably 0.8 or more and 1.2 or less, more preferably 0.9 or more and 1.1 or less. Furthermore, regarding the number of flux-blocking portions included in the core, it is preferably 0.5 times or more and 1.5 times or less of the number of flux-blocking portions determined by the flux-blocking portion information MO, more preferably 0.75 times or more and 1.25 times or less, and even more preferably 1 time. Furthermore, regarding the shortest distance between the position of the representative point of the original flux-blocking portion and the position of the representative point of the corrected flux-blocking portion, it is preferably, for example, 0.04 times or more and 0.06 times the length of the core, more preferably 0.02 times or more and 0.04 times or less, even more preferably more than 0.00 times and less than 0.02 times, and most preferably 0 mm. Here, the length of the core is, for example, the maximum length of the core in a section perpendicular to the central axis of the core. Figure 3 In the example shown, the length of the iron core is the outer diameter of the rotor iron core 311.

[0127] The device designed as described above (in this embodiment, an IPMSM) is manufactured using a manufacturing apparatus. The manufacturing apparatus itself can be a known manufacturing apparatus. In the core manufacturing process, a core including a flux-blocking portion designed as described above is manufactured. If the flux-blocking portion is a flux-blocking member, for example, the flux-blocking member is formed on the core using a cutting device for cutting soft magnetic material plates. Cutting can be performed by punching, laser processing, or other methods. Alternatively, the output unit 415 may output the flux-blocking information MO to a control device that controls the cutting device. In this case, the control device may control the cutting device based on the flux-blocking information MO. The output processing device 430 may also include a control device.

[0128] <Hardware>

[0129] As mentioned above, the processing device 410 can be implemented using various hardware, for example, it can be implemented using... Figure 8 The hardware shown is used for implementation.

[0130] exist Figure 8 In the process, the processing device 410 includes a processor 801, a main storage device 802, an auxiliary storage device 803, a communication circuit 804, a signal processing circuit 805, an image processing circuit 806, an I / F circuit 807, and a bus 808.

[0131] The processor 801 provides overall control of the processing device 410. The processor 801 uses the main storage device 802 as its working area and executes programs stored in the auxiliary storage device 803. In this embodiment, the program stored in the auxiliary storage device 803 includes, for example, the execution of... Figure 5 The flowchart shown illustrates the program. Processor 801 can be, for example, a CPU or a GPU. Main storage device 802 temporarily stores data. In addition to the program executed by processor 801, auxiliary storage device 803 also stores various types of data.

[0132] The communication circuit 804 is a circuit used for communication with the outside of the processing device 410. The communication circuit 804 can perform both wireless and wired communication with the outside of the processing device 410.

[0133] The signal processing circuit 805 performs various signal processing operations on the signals received by the communication circuit 804 and the control input signals performed by the processor 801.

[0134] The image processing circuit 806 performs various image processing operations on the control input signals according to the processor 801. The image processing signals processed by the image processing circuit 806 are output to the output processing device 430, which includes a computer display, for example, via the I / F circuit 807.

[0135] I / F circuit 807 exchanges data with a device communicatively connected to I / F circuit 807. Figure 8In this diagram, an input processing device 420 and an output processing device 430 are shown as devices communicatively connected to the I / F circuit 807. However, the devices connected to the I / F circuit 807 are not limited to these. For example, a portable storage medium could also be connected to the I / F circuit 807. Furthermore, when the output processing device 430 includes the aforementioned control device, for example, the communication circuit 804 and the output processing device 430 are communicatively interconnected. In this case, the output processing device 430 communicatively connected to the I / F circuit 807 (e.g., a user interface) and the output processing device 430 communicatively connected to the communication circuit 804 (e.g., the aforementioned control device) are different devices.

[0136] Furthermore, the processor 801, main storage device 802, auxiliary storage device 803, signal processing circuit 805, image processing circuit 806, and I / F circuit 807 are connected to the bus 808. Communication between these components is conducted via the bus 808. Moreover, the hardware of the processing device 410 is not limited to any specific type, as long as it can implement the aforementioned functions of the processing device 410. Figure 8 The hardware shown. For example, the processing device 410 may also include multiple processors 801.

[0137] (Calculation example)

[0138] Next, a calculation example will be explained. In this calculation example, the calculation will be... Figure 3 The rotor core 311 of the IPMSM300 shown is used as the original core, and a flux blocking element is generated on the original core using the methods of this embodiment and Patent Document 1, respectively.

[0139] In this calculation example, the number of poles of the IPMSM300 is set to 8. Furthermore, the number of slots of the IPMSM300 is set to 24. Furthermore, the outer diameter of the stator core 321 is set to 55 mm. Furthermore, the outer diameter of the rotor core 311 is set to 27.5 mm. Furthermore, the residual magnetic flux density of the permanent magnets 312a to 312b is set to 1.2 T. Furthermore, the rotational speed of the IPMSM300 is set to 1500 rpm (and the excitation frequency is set to 100 Hz). Furthermore, the angle of attack is set to 40°. Furthermore, the effective value of the excitation current is set to 20 A. Furthermore, a real-valued genetic algorithm is used as the algorithm for optimization calculation. Furthermore, the average torque of the IPMSM is set as the objective function value.

[0140] Furthermore, as described in Patent Document 1, the torque is made to be Maxwell stress. Additionally, the average torque is calculated based on the torque in each grid. Furthermore, the number of repetitions in the optimization calculation (convergence calculation) is made the same in each method, so that the computational load in this embodiment is equal to that in the method described in Patent Document 1. That is, the solution obtained when performing the optimization calculation (convergence calculation) with this number of repetitions is taken as the optimal solution.

[0141] The average torque of the IPMSM when the optimal solution is obtained in the method of this embodiment and the method described in Patent Document 1 is taken as the average torque of the IPMSM including the flux blocking element calculated by each method. Furthermore, the average torque of the IPMSM including the flux blocking element was calculated. Figure 3 The average torque of the IPMSM300 is shown.

[0142] The average torque of the IPMSM including the flux blocking element generated by the method of this embodiment is relative to Figure 3 The average torque of the IPMSM300 shown increased by 82.4%. On the other hand, the average torque of the IPMSM including the flux blocking element generated by the method described in Patent Document 1 is relative to... Figure 3 The average torque of the IPMSM300 shown increased by 55.7%. Therefore, with the same computational load, the method of this embodiment can calculate a superior optimal solution (flux blocking element) compared to the method described in Patent Document 1. That is, compared to the method described in Patent Document 1, the method of this embodiment can shorten the time to converge to the optimal solution. Compared to the method described in Patent Document 1, the method of this embodiment has a smaller search range for solutions, thus reducing the computational load.

[0143] Figure 9A This is a diagram illustrating an example of the generation result of the magnetic flux blocking element in the method of this embodiment. Figure 9B This is a diagram illustrating an example of the generation result of the magnetic flux blocking element in the method described in Patent Document 1.

[0144] like Figure 9A As shown, in the method of this embodiment, representative points of the flux blocking element are sampled based on the distribution of generation probability. Therefore, it is assumed that the flux blocking elements are concentrated at locations that contribute significantly to the average torque of the IPMSM. On the other hand, as Figure 9B As shown, the method described in Patent Document 1 does not consider the ease (and difficulty) of selecting the positions of each location in the design area when generating the flux blocking element. Therefore, in the method described in Patent Document 1, it is assumed that the element is also generated at locations where its contribution to the average torque of the IPMSM is relatively small. Furthermore, in the method described in Patent Document 1, it is assumed that a large number of flux blocking elements are generated over a wide area. In addition, in Figure 9A and Figure 9B As shown in the results, the method of this embodiment has fewer flux blocking elements and larger individual flux blocking elements compared to the method described in Patent Document 1. Therefore, it is believed that the method of this embodiment can produce flux blocking elements that are easier to manufacture compared to the method described in Patent Document 1.

[0145] (Summarize)

[0146] In this embodiment, the processing device 410 calculates the distribution of generation indices that evaluate the ease of generating flux-blocking portions in the design region of the original iron core 711 based on the distribution of magnetic properties in that design region. Then, based on this distribution of generation indices, the processing device 410 determines the region of the flux-blocking portion in the design region of the original iron core 711. Therefore, for example, it is possible to determine the ease (and difficulty) of generating the flux-blocking portion based on the magnetic properties before the flux-blocking portion is generated, according to the location of the design region of the original iron core 711. Therefore, for example, it is possible to reduce the likelihood of generating flux-blocking portions that do not contribute to improving the properties of the iron core during the solution search process. Therefore, for example, it is possible to generate flux-blocking portions that improve the properties of the iron core without imposing a large computational load.

[0147] Furthermore, in this embodiment, the processing device 410 selects a region from the design area of ​​the original core 711 based on the distribution of the generation index, and generates evaluation cores 721 and 731 that include magnetic flux blocking portions in the selected region. Then, the processing device 410 calculates the characteristic values ​​of the device including the evaluation cores 721 and 731, and determines the region of the magnetic flux blocking portion in the design area based on the characteristic values. Therefore, for example, it is possible to generate magnetic flux blocking portions that improve the characteristics of the device based on the characteristic values ​​of the device as quantitative indicators.

[0148] Furthermore, in this embodiment, the processing device 410 samples points within the design area based on the distribution of generation probabilities and generates magnetic flux blocking sections based on the sampled points. Therefore, for example, it is possible to quantitatively determine which location within the iron core will be used as a magnetic flux blocking section according to the generation probability. Thus, for example, it is possible to generate magnetic flux blocking sections with improved iron core characteristics more reliably.

[0149] Furthermore, in this embodiment, the processing device 410 samples points within the design area as representative points of the flux-impeding portion based on the distribution of generation probabilities. Therefore, for example, it is possible to calculate the properties of the flux-impeding portion other than the representative points without using the distribution of generation probabilities. Thus, for example, the degree of freedom in generating the flux-impeding portion can be increased. Alternatively, the processing device 410 may use the distribution of generation probabilities to calculate the properties of the flux-impeding portion other than the representative points.

[0150] Furthermore, in this embodiment, the processing apparatus 410 generates a flux-impeding portion based on the results of electromagnetic field analysis of the evaluation cores 721 and 731. Therefore, for example, it is possible to quantitatively evaluate the degree to which the flux-impeding portion, including the sampled points, contributes to improving the characteristics of the core. Thus, for example, it is possible to generate a flux-impeding portion that improves the characteristics of the core more reliably.

[0151] Furthermore, in this embodiment, the processing apparatus 410 generates a flux-blocking portion by adding, modifying, or deleting a flux-blocking portion from the original iron core 711. Modifying the flux-blocking portion refers to, for example, changing at least one of the position, size, and shape of an existing flux-blocking portion. Therefore, for example, a flux-blocking portion can be generated by modifying the original iron core 711. Therefore, for example, constituent elements other than the flux-blocking portion can be predetermined using the original iron core 711. Thus, for example, compared to simultaneously generating both constituent elements other than the flux-blocking portion and the flux-blocking portion, the computational load can be reduced.

[0152] Furthermore, in this embodiment, the processing device 410 calculates the distribution of magnetic properties based on the results of electromagnetic field analysis of the original iron core 711. Therefore, for example, even if the distribution of magnetic properties in the original iron core 711 is not present, the distribution of magnetic properties in the original iron core 711 can be obtained. Therefore, for example, various types of original iron cores can be used as the original iron core.

[0153] Furthermore, in this embodiment, the processing device 410 acquires region condition information that allows for the determination of a permissible region. Then, the processing device 410 generates a flux-blocking portion within that permissible region. Therefore, for example, by limiting the region where the flux-blocking portion is generated to the permissible region, the computational load can be further reduced. Furthermore, for example, it is possible to suppress the generation of flux-blocking portions at locations where flux-blocking portions should not exist within the design region.

[0154] Furthermore, in this embodiment, the processing apparatus 410 uses the generation probability of the magnetic flux obstruction portion as a generation index to evaluate the ease of generation of the magnetic flux obstruction portion. Therefore, for example, it is possible to quantitatively evaluate the ease (and difficulty) of generation of the magnetic flux obstruction portion.

[0155] Furthermore, in this embodiment, the processing apparatus 410 uses the distribution of representative values ​​of magnetic properties over one cycle as the distribution of magnetic properties. Therefore, for example, it is possible to use a distribution that more accurately reflects the magnetic properties of the iron core as the distribution of magnetic properties. Therefore, for example, it is possible to generate a flux-blocking portion that improves the properties of the iron core more reliably.

[0156] (Other implementation methods)

[0157] Furthermore, the embodiments of this disclosure described above can be implemented by executing a program on a computer. In addition, computer-readable storage media storing the program and computer program products such as the program can also be used as embodiments of this disclosure. As storage media, examples include floppy disks, hard disks, optical disks, magneto-optical disks, CD-ROMs, magnetic tapes, non-volatile memory cards, and ROMs.

[0158] Furthermore, the embodiments of this disclosure described above are merely specific examples of implementing this disclosure, and the technical scope of this disclosure should not be interpreted as limited based on them. That is, this disclosure can be implemented in various forms without departing from its technical concept or its main features.

[0159] Industrial availability

[0160] This disclosure can be used, for example, in the design and manufacture of iron cores.

Claims

1. A processing apparatus for performing processing for designing an iron core including a flux-blocking section, The processing device includes: The index calculation unit calculates the distribution of generated indices based on the distribution of magnetic properties in the design region of the original iron core, which serves as the prototype of the designed iron core, and is used to evaluate the ease of generating the magnetic flux obstruction part in the design region. as well as The decision-making unit determines the region of the magnetic flux impediment in the design region based on the distribution of the generated indicators. The design area is the region within the cut surface of the original iron core. The cut surface of the original iron core is a cut surface in a direction perpendicular to the direction in which the magnetic flux obstruction is viewed from above.

2. The processing apparatus as claimed in claim 1, wherein, The decision-making unit selects a region from the design region based on the distribution of the generated indicators. An evaluation core is generated that includes the magnetic flux impediment in the selected area. Calculate the characteristic values ​​of the device including the evaluated iron core. Based on the calculated characteristic values, the region of the magnetic flux obstruction section in the design region is determined.

3. The processing apparatus as described in claim 2, wherein, The decision unit samples points within the design area based on the distribution of the generated indicators, and selects the selection area based on the sampled points.

4. The processing apparatus as claimed in claim 3, wherein, The decision unit samples points within the design area as representative points of the magnetic flux obstruction unit.

5. The processing apparatus according to any one of claims 2 to 4, wherein, The decision unit calculates the characteristic values ​​of the device by performing electromagnetic field analysis on the evaluation core.

6. The processing apparatus according to any one of claims 2 to 5, wherein, The decision unit generates the evaluation core by adding, changing, or deleting at least one of the magnetic flux obstruction units for the design region.

7. The processing apparatus according to any one of claims 1 to 6, further comprising a distribution calculation unit that calculates the distribution of magnetic properties in the design region based on the results of electromagnetic field analysis of the original iron core.

8. The processing apparatus according to any one of claims 1 to 7, further comprising an acquisition unit that acquires prerequisite information representing the prerequisite conditions for generating the magnetic flux blocking unit. The prerequisite information includes regional condition information that can determine the permitted region, which is determined to be a region of magnetic flux obstruction in the iron core. The determining part determines the area of ​​the magnetic flux blocking part in the iron core within the permitted area.

9. The processing apparatus according to any one of claims 1 to 8, wherein, The generation index is the generation probability of the magnetic flux obstruction section.

10. The processing apparatus according to any one of claims 1 to 9, wherein, The distribution of the magnetic properties is the distribution of representative values ​​of the magnetic properties over one period.

11. The processing apparatus according to any one of claims 1 to 10, wherein, The magnetic flux blocking part includes a gap.

12. The processing apparatus according to any one of claims 1 to 11, wherein, The magnetic properties are magnetic flux density, magnetic field strength, or magnetic permeability.

13. A processing method comprising processing an iron core for designing a flux-impeding section, The processing method includes: The index calculation process calculates the distribution of generated indexes based on the distribution of magnetic properties in the design region of the original iron core, which serves as the prototype of the designed iron core, and uses this distribution to evaluate the ease of generating the magnetic flux obstruction portion in the design region. as well as The process determines the region of the magnetic flux impediment within the design area based on the distribution of the generated indicators. The design area is the region within the cut surface of the original iron core. The cut surface of the original iron core is a cut surface in a direction perpendicular to the direction in which the magnetic flux obstruction is viewed from above.

14. A program for enabling a computer to function as a part of a processing apparatus as described in any one of claims 1 to 12.

15. A core comprising, in whole or in part, the flux blocking portion in at least one region of the region determined by the determining portion included in the processing apparatus according to any one of claims 1 to 12.

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