JP2014071690A - Analysis model generation apparatus, analysis model generation method and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an analysis model generation apparatus that is relatively close to the design of an actual machine, can be shared by various simulators, and can automatically generate a numerical analysis model having a winding structure in which a winding space is considered.SOLUTION: An analysis model generation apparatus generates a numerical analysis model of a rotary machine in which a conducting wire is wound around a plurality of teeth constituting an iron core, and includes: means of accepting information on an annular bridge space 5 in which the conducting wire should be bridged over the plurality of teeth, outside the rotation axis direction of the rotary machine with respect to the teeth; and regarding each of a plurality of winding bundles formed by winding the conducting wire around the plurality of teeth, division means of dividing the bridge space 5 without any gaps in an arcuate space 51 over which the conducting wire of the winding bundle should be bridged.

Description

  The present invention relates to an analysis model generation apparatus, an analysis model generation method, and a computer program that generate a numerical analysis model of a rotating machine.

  The design of rotating machines such as motors and generators is performed using, for example, three-dimensional CAD (Computer Aided Design). The performance of a rotating machine designed using a three-dimensional CAD is evaluated by a performance test using a real machine or a numerical analysis using a computer, and the design is repeated to correct a found defect. CAE (Computer Aided Engineering), which uses a computer to numerically analyze the performance of rotating machines, is easier to change the design and reduces the development cost of rotating machines compared to performance tests using actual rotating machines. it can. As the CAE, for example, a finite element method is used. In the finite element method, a numerical analysis model representing a rotor and a stator of a rotating machine having a complicated shape and electromagnetic characteristics is divided into finite elements having a simple shape and electromagnetic characteristics, thereby obtaining a Finite Element Method. ) A numerical analysis method that predicts the behavior of the entire rotating machine by generating a model and approximately calculating the characteristics of each simplified finite element.

JP 2004-054639 A

  However, it is very difficult to model a three-dimensional analysis model of a rotating machine, especially winding, and it is difficult to create it manually as well as automatically. In an actual rotating machine, after winding a conducting wire in a slot, the conducting wire is pushed into the winding space, so it is extremely difficult to grasp the detailed three-dimensional arrangement such as in which space each conducting wire is located. Moreover, since each conducting wire is bent and crushed, the cross-sectional shape of the conducting wire cannot be constant. For this reason, it is difficult to model a winding structure close to the actual machine with CAD software or the like.

By providing the constraint that the cross section of the conducting wire is always constant, the complicated shape of the winding is automatically modeled. However, the winding shape may be different from that of the actual machine.
In the actual design of a rotating machine, a winding space in which the winding is to be arranged is defined. However, the winding arrangement modeled by the above-described modeling method with the restriction that the cross-sectional shape of the conducting wire is constant is different from the winding space defined by the actual machine. In the modeling of windings with a large space outside the winding space, the winding model also takes into account changes in the magnetic flux generated outside the winding space, which may deviate greatly from the actual machine behavior. That is, there is a problem that a numerical analysis model considering the winding space cannot be created.
FIG. 20 is a longitudinal cross-sectional perspective view showing an example of a rotating machine in which a winding protrudes greatly from the winding space. The iron core 304 of the rotating machine has an annular back yoke 341, for example. A plurality of teeth 342 projecting radially inward are provided on the inner peripheral surface of the back yoke 341. A winding 309 is distributed in each slot 343. As shown in FIG. 20, the conductive wire of the winding 309 that is wound in a distributed manner is spanned across a plurality of teeth 342 and wound. When modeling such a rotating machine, if a constraint is made that the cross-sectional shape of the conducting wire is constant, a numerical analysis model in which the winding protrudes greatly from the winding space defined by the actual machine may be automatically generated. .

On the other hand, as a method of creating a numerical analysis model for magnetic field analysis, there is a method of accepting input of a winding space, the number of turns of a winding, and a cross-sectional shape of a conducting wire, and automatically generating a winding structure based on such information. However, depending on the relationship between the winding space, the number of turns and the cross-sectional shape, a gap may be generated between the conductors. When creating a numerical analysis model for magnetic field analysis where there is a gap between the winding conductors, it is necessary to prepare numerical analysis models for thermal analysis and structural analysis separately from those for magnetic field analysis. There is a problem that cannot be shared.
In the thermal analysis, it is considered that the amount of heat moves between adjacent windings because the windings are in close contact with each other. In order to express heat conduction, it is necessary to create a numerical analysis model in which conductors are adjacent to each other, or to build a thermal circuit that generates heat exchange between separated conductors.
Also in the structural analysis, when conducting a structural analysis based on the rigidity of the conductive wire itself and the excitation force caused by the current flowing in the conductive wire, for example, a vibration analysis, it is more convenient to handle a plurality of conductive wires as one body. If there is a gap between the conductors, the physical quantity can only be transferred by a concentrated amount, not a distributed amount.
When solving complicated phenomena of electrical equipment, coupled analysis combining multiple analyzes is performed. For example, the loss obtained in the magnetic field analysis is transferred to the thermal analysis, and the coupled analysis that evaluates the temperature rise, and the electromagnetic force obtained in the magnetic field analysis is transferred to the structural analysis to take into account the vibration state and deformation of each part. When displacement is calculated by analysis or structural analysis, there is a coupled analysis that passes the magnetic field analysis or thermal analysis to evaluate the state after deformation. In performing these coupled analyses, if analysis data using the same shape can be created, the distribution amount calculated in each analysis can be used as it is, so the analysis accuracy can be improved. Creating a complicated shape model in a limited time is difficult in terms of man-hours. Even if one complicated shape can be created, the analysis cannot be repeated many times with the dimension as a parameter.

  The present invention has been made in view of such circumstances, and its purpose is relatively close to the design of an actual machine, and can be shared by various simulators, and a numerical analysis model having a winding structure in which winding space is considered. An object of the present invention is to provide an analysis model generation apparatus, an analysis model generation method, and a computer program that can be automatically generated.

  An analysis model generation apparatus according to the present invention is an analysis model generation apparatus that generates a numerical analysis model of a rotating machine in which a conductive wire is wound around a plurality of teeth constituting an iron core. Means for receiving information on an annular spanning space in which a conductor is to be bridged across the plurality of teeth, and a plurality of winding bundles formed by winding the conductor around the plurality of teeth, Splitting means for splitting the winding bundle with no gap in an arcuate space to be spanned is provided.

  The analysis model generation apparatus according to the present invention generates a winding space formed by connecting both circumferential ends of the arc-shaped space divided by the dividing means and a space between teeth into which the winding bundle is to be inserted. Means are provided.

  The analysis model generation apparatus according to the present invention is characterized in that the space between the teeth into which the winding bundle is to be inserted has a rod shape.

  In the analysis model generation device according to the present invention, the space between the teeth into which the winding bundle is to be inserted is a space formed by dividing a space following the shape between the teeth.

  The analysis model generation device according to the present invention is based on the number of pitches indicating the number of conductors to be bridged across the teeth, the means for acquiring the number of teeth, the acquired number of pitches and the number of teeth, Means for determining the position of the center line of the winding bundle in the spanning space, and the dividing means divides the spanning space at an intermediate position between the center lines of the adjacent winding bundles. It is characterized by.

  An analysis model generation method according to the present invention is an analysis model generation method for generating a numerical analysis model of a rotating machine in which a conductive wire is wound around a plurality of teeth constituting an iron core. Receiving the information of the annular spanning space in which the conducting wire is to be bridged across the plurality of teeth, and for each of a plurality of winding bundles formed by winding the conducting wire around the plurality of teeth, the spanning space is defined as the winding bundle. It divides | segments into the arc-shaped space where the conducting wire of this should be spanned without gap.

  The computer program according to the present invention is a computer program for causing a computer to generate a numerical analysis model of a rotating machine in which a conductive wire is wound around a plurality of teeth constituting an iron core. Means for accepting information on an annular spanning space over which the conductors are to be bridged across the plurality of teeth, and a plurality of winding bundles formed by winding the conductors around the plurality of teeth. Is made to function as a dividing means that divides the winding bundle into an arc-like space to be bridged without any gap.

  In the present invention, it accepts information on an annular spanning space in which a conductor is to be bridged across a plurality of teeth, and for each of the plurality of winding bundles, there is no gap in the arcuate space where each winding bundle exists. To divide.

  In the present invention, the winding space is generated by connecting the arcuate space in which the conductive wire is to be bridged and the space between the teeth in which the winding bundle is to be inserted.

  In the present invention, the winding space is generated by connecting the arc-shaped space and the bar-shaped space.

  In the present invention, the winding space is generated by connecting the arc space and a space formed by dividing the space following the shape between the teeth.

  In the present invention, the position of the center line of the winding bundle in the spanning space is determined based on the number of pitches and the number of teeth. Then, the spanning space is divided without gaps by dividing the spanning space at an intermediate position between the center lines of adjacent winding bundles.

  According to the present invention, it is possible to automatically generate a numerical analysis model having a winding structure that is relatively close to the design of an actual machine, can be shared by various simulators, and has a winding space taken into consideration.

It is a block diagram which shows the example of 1 structure of the analysis model production | generation apparatus which concerns on Embodiment 1 of this invention. It is the flowchart which showed the process sequence of CPU which concerns on the production | generation of a numerical analysis model. It is the perspective view which showed notionally an example of the overhead space. It is the top view which showed an example of the transit space notionally. It is the sectional side view which showed an example of the overhead space notionally. It is the perspective view which showed notionally an example of the centerline of a winding bundle. It is the fragmentary top view which showed notionally an example of the centerline of a winding bundle. It is the fragmentary top view which showed an example of the division | segmentation method of an overhead space. It is the fragmentary top view which showed the other example of the division | segmentation method of an overhead space. It is the perspective view which showed an example of winding space. It is the perspective view which showed an example of winding space. It is the perspective view which showed the other example of winding space. FIG. 10 is a perspective view conceptually showing an example of a center line of a winding bundle in the second embodiment. FIG. 10 is a partial plan view conceptually showing an example of a center line of a winding bundle in the second embodiment. FIG. 10 is a partial plan view showing an example of a method for dividing the overhead space in the second embodiment. It is explanatory drawing which showed the 1st example of the coil | winding aspect notionally. It is explanatory drawing which showed the 2nd example of the coil | winding aspect notionally. It is explanatory drawing which showed notionally the 3rd example of the coil | winding aspect. It is explanatory drawing which showed notionally the 4th example of the coil | winding aspect. It is a longitudinal cross-sectional perspective view which shows an example of the rotary machine from which the coil | winding protruded large winding space.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
FIG. 1 is a block diagram showing a configuration example of an analysis model generation apparatus according to Embodiment 1 of the present invention. In the figure, reference numeral 1 denotes an analysis model generation apparatus according to Embodiment 1 of the present invention. The analysis model generation apparatus 1 is configured using a computer, and includes a magnetic field analysis function, a thermal analysis function, a structure analysis function, and the like of a rotating machine using a finite element method.

  The analysis model generation apparatus 1 is a computer that includes a CPU (Central Processing Unit) 11 that controls the operation of each component of the analysis model generation apparatus 1. An internal storage device 12, an external storage device 13, and a communication interface 16 are connected to the CPU 11 via a bus.

  The internal storage device 12 stores a non-volatile memory such as a mask ROM or EEPROM that stores a control program necessary for the initial operation of the computer and a control program necessary for the operation of the computer, and executes the arithmetic processing of the CPU 11. It consists of a memory such as a DRAM or SRAM that temporarily stores various data generated.

  The external storage device 13 is a device such as a hard disk drive or a solid-state drive that can be read, a CD-ROM drive that can read data from the portable recording medium 2, or the like. The computer program 20 according to the first embodiment is recorded on the recording medium 2 so as to be readable. The computer program 20 according to the first embodiment includes a portable recording medium such as a CD (Compact Disc) -ROM, a DVD (Digital Versatile Disc) -ROM, or a BD (Blu-ray Disc) recorded in a computer-readable manner. 2 is recorded on the disk drive. The CPU 11 reads the computer program 20 from the recording medium 2 on which the computer program 20 is recorded or a disk drive and stores the computer program 20 in the internal storage device 12. Needless to say, the optical disk is an example of the recording medium 2, and the computer program 20 is recorded in a computer-readable manner on a flexible disk, a magnetic optical disk, an external hard disk, a semiconductor memory, or the like, and is read by the external storage device 13. It may be configured. The computer program 20 according to the present invention may be downloaded from an external communication device 3 connected to the communication interface 16.

  The external storage device 13 stores a numerical analysis model for performing a finite element method analysis of the rotating machine together with the computer program 20. In particular, in the first embodiment, the external storage device 13 stores a numerical analysis model expressing the three-dimensional shape of the iron core 4 (see FIG. 3) having a plurality of teeth 42. The numerical analysis model of the iron core 4 is three-dimensional CAD data that is the basis of the numerical analysis model of the rotating machine. By adding a three-dimensional shape representing the winding structure to the numerical analysis model of the iron core 4, the stator or rotor The three-dimensional shape model is generated. In addition, the external storage device 13 stores various material constants, constitutive equations, and the like that characterize the numerical analysis model.

  The analysis model generation apparatus 1 includes an input device 14 such as a keyboard or a mouse and an output device 15 such as a liquid crystal display or a CRT display, and is configured to accept an operation such as data input by a user.

FIG. 2 is a flowchart showing a processing procedure of the CPU 11 related to generation of the numerical analysis model. Receiving the instruction to create the numerical analysis model of the rotating machine, the CPU 11 adds the winding space expressing the three-dimensional shape of the winding to the tertiary shape model of the iron core 4 by executing the following processing, and rotates it. A numerical analysis model of the machine is generated.
First, the CPU 11 reads a three-dimensional shape model of the iron core 4, that is, a numerical analysis model, from the external storage device 13 (step S1). And CPU11 receives the information which prescribes | regulates the cyclic | annular spanning space 5 where the conducting wire of a winding should be spanned across the some teeth 42 via the input device 14 (step S2).

  3 is a perspective view conceptually showing an example of the overhead space 5, FIG. 4 is a plan view conceptually showing an example of the overhead space 5, and FIG. FIG. In FIG. 4, a part of the overhead space 5 is drawn. As shown in FIG. 3, the iron core 4 of the rotating machine has an annular back yoke 41, for example. A plurality of teeth 42 projecting radially inward are provided on the inner peripheral surface of the back yoke 41. A space between adjacent teeth 42 is a slot 43. The three-dimensional shape model read out in step S1 is three-dimensional CAD data representing the shape of the iron core 4 configured as described above.

  The transit space 5 expressed by the information received in the process of step S2 is an annular space shown above the iron core 4 in FIG. 3, and the center line 6 of the transit space 5 is aligned with the rotating shaft of the rotating machine. I'm doing it. Specifically, the CPU 11 receives the inner and outer diameters of the overhead space 5 and the positions of both end faces in the rotation axis direction. The inner diameter of the spanning space 5 is the innermost circumferential surface of the space where the windings can be placed, and the outer diameter of the spanning space 5 is the outermost circumferential surface of the space where the windings can be placed. The positions of both end faces of the spanning space 5 in the rotation axis direction are the upper and lower surfaces of the space through which the conductor may pass when the conductor is bridged across the teeth 42 in FIG. The CPU 11 handles the shape of the three-dimensional shape model with, for example, coordinate values in a cylindrical coordinate system. The Z axis of the cylindrical coordinate system is, for example, the center line of the iron core 4, that is, the rotation axis direction of the rotating machine, and the central portion in the thickness direction of the back yoke 41 is set to Z = 0. As shown in FIG. 4, the direction of the broken line extending rightward from the center point O of the iron core 4 is set to θ = 0, and the coordinate system may be determined so that the value of θ increases counterclockwise. When the cylindrical coordinate system is determined in this way, the CPU 11 accepts the values of R1 and R2 shown in FIG. 4 as the inner and outer diameters of the overhead space 5. Moreover, CPU11 receives the value of Z1, Z2 as a position of the both end surfaces in the rotating shaft direction of the transit space 5, as shown in FIG.

  CPU11 which finished the process of step S2 receives the reference | standard position which is the winding start position of the number of slots which showed the number of slots of a rotary machine, the number of conductors straddling the teeth 42, and the winding (step S3). ). In the first embodiment, the number of slots is 20, the number of pitches is 4, and the winding start position is the position of the angle θ shown in FIG. The number of slots is determined by the shape of the iron core 4. When the external storage device 13 stores the information on the number of slots together with the three-dimensional shape model of the iron core 4, the CPU 11 reads the number of slots from the external storage device 13. It may be configured. Further, as shown in FIG. 4, the number of slots may be received because the number of teeth 42 is equivalent to the number of slots. Furthermore, the winding start position of the winding may be designated by a number assigned to each of the plurality of slots 43.

  CPU11 which finished the process of step S3 determines the position of the centerline 6 of the winding bundle in the transit space 5 based on the received pitch number and slot number (step S4). The winding bundle is a bundle composed of a plurality of windings wound around the same tooth 42. For example, a bundle of a plurality of windings wound across the first to fourth teeth 42 is called a winding bundle.

6 is a perspective view conceptually showing an example of the center line 6 of the winding bundle, and FIG. 7 is a partial plan view conceptually showing an example of the center line 6 of the winding bundle. In FIG. 6, the arrow indicated by the symbol Z indicates the direction of the rotating shaft of the rotating machine. The center line 6 of the winding bundle is determined by the following method, for example. Here, a method for determining a representative point of coordinate values (R, θ) through which the center line 6 passes will be described. The CPU 11 determines (number of pitches + 1) representative points for each winding bundle. The winding start position of the winding is the 0th representative point. The coordinate value θ ₀ of the 0th representative point 61 is the value accepted in step S3. The radial position of the zeroth representative point 61 may be set as coordinate value R ₀ = R1 + (R2−R1) / (2 × number of pitches). The coordinate value θ ₁ of the first representative point in the slot 43 adjacent one counterclockwise is θ ₀ + 360 ° / number of slots, and the coordinate value R ₁ is R ₀ + (R2−R1) / number of pitches. Similarly, another representative point can be determined by adding the value of coordinate value θ by 360 ° / slot number and adding the value of coordinate value R by (R2−R1) / pitch number. . Then, the center line 6 is obtained by connecting the representative points calculated in this way with straight lines or curves. In FIG. 6, straight lines are further drawn downward from the zeroth representative point 61 and the final representative point 62 at both ends in the circumferential direction in the Z-axis direction, but it is easy to recognize the arrangement of the winding center line 6 in the three-dimensional space. This is for the purpose of doing this, but not essential.
For other winding bundles, the center line 6 can be similarly calculated by setting the coordinate value θ ₀ of the 0th representative point 61 to a value obtained by adding 360 ° / the number of slots.

  CPU11 which finished the process of step S4 divides | segments the spanning space 5 into the arcuate space 51 (refer FIG. 8) in which the conducting wire of this winding bundle should be spanned about each of several winding bundles (step S5).

FIG. 8 is a partial plan view showing an example of a method for dividing the overhead space 5. For example, the CPU 11 divides the spanning space 5 at an intermediate position between the center lines 6 of adjacent winding bundles. The division position is the same regardless of the position of the Z-axis, and the arc-shaped space 51 is a plate-shaped space in which the Z-axis cross section is substantially arc-shaped. The shape of both end portions of the arc space 51 is such that the end portions of the arc space 51 are cut off by a plane passing through the radial center of the slot 43.
More specifically, the CPU 11 determines a dividing surface 52 that divides the overhead space 5, that is, a surface that separates adjacent arc spaces 51 as follows, for example. First, a plane passing through the center of two center lines 6 and 6 adjacent in the radial direction is determined. For example, when the coordinate value of the first center line 6 is (r1, θ) and the coordinate value of the second center line 6 is (r2, θ), a plurality of midpoints ((r1 + r2) / 2, θ), and a central plane 52a parallel to the Z axis passing through a plurality of midpoints is determined. The range of the coordinate value z of the central surface 52a is Z1 to Z2. In the slot 43 where the 0th feature point 61 of the first center line 6 exists, the end plane 52b passing through the radial center of the slot 43 and parallel to the Z axis is connected to the central plane 52a. To do. The range of the coordinate value R of the end plane 52b is, for example, the radial coordinate value of the central surface 52a in the radial center of R1 to the slot 43. The range of the coordinate value Z of the end plane 52b is Z1 to Z2. Similarly, in the slot 43 in which the final feature point 62 of the second center line 6 exists, the end plane 52c passing through the radial center of the slot 43 and parallel to the Z axis is connected to the central plane 52a. To do. The range of the coordinate value R of the end plane 52c is, for example, the radial coordinate value to R2 of the central surface 52a at the radial center of the slot 43. The range of the coordinate value Z of the end plane 52c is Z1 to Z2. The dividing surface 52 includes a central surface 52a determined in this way and end planes 52b and 52c. The dividing plane 52 is determined in the same manner for the other center lines 6.
Note that the above-described method of determining the dividing surface 52 is an example, and if the spanning space 5 can be split without a gap at the middle position of the center line 6 for each adjacent winding bundle, the spanning space 5 may be split by another method. Also good.

  FIG. 9 is a partial plan view showing another example of the method for dividing the overhead space 5. In the example shown in FIG. 9, the shape of one end portion of the arc space 151 is a wedge shape. Thus, the shape of the both ends of the arc space 151 is not particularly limited, and may be a shape with a fillet or chamfer.

  The CPU 11 that has finished the process of step S5 connects the arc space 51 representing the winding bundle portion spanned across the plurality of teeth 42 and the slot space 7 (see FIG. 10) to connect the winding space. 9 (see FIG. 10) is generated (step S6), and the process ends.

10 and 11 are perspective views showing an example of the winding space 9. As shown in FIGS. 10 and 11, the winding space 9 includes an arc-shaped space 51, an in-slot space 7, and a connection space 8 that connects the arc-shaped space 51 and the in-slot space 7. The slot internal space 7 is a plate-like space formed by dividing a space following the shape between adjacent teeth 42, for example. Here, not the entire slot 43 formed by the adjacent teeth 42 but a half space divided into two in the circumferential direction or the radial direction on the plane passing through the center in the circumferential direction is defined as the slot inner space 7. When the slot internal space 7 is defined in this manner, as shown in FIG. 10, when the end of the arcuate space 51 is located in the same slot 43, the slot internal space 7 connected to the end of the one arcuate space 51 and The total space of the slot 43 is a combination of the in-slot space 7 connected to the end of the other arcuate space 51.
The shape of the connection space 8 is not particularly limited, but it is desirable to connect within the range of the inner diameter and the outer diameter of the transit space 5. The connection space 8 may be connected using, for example, a loft function.

  FIG. 12 is a perspective view showing another example of the winding space 109. As shown in FIG. 12, the shape of the slot internal space 107 is not limited to the shape following the shape of the slot 43, and may be a rod shape that passes through the slot 43 in the rotation axis direction. The in-slot space 107 may be created by the process of step S6. If the space of the slot 43 has already been formed in the three-dimensional shape model read out in step S1, the space is defined as the in-slot space 107. You may make it handle and connect with the arcuate space 51. FIG.

  A three-dimensional shape representing other components such as a rotor may be appropriately added to the three-dimensional analysis model created in this way. Then, the FEM model is obtained by dividing the numerical analysis model of the rotating machine into a plurality of finite elements. Using this FEM model, electromagnetic field analysis, magnetic analysis, structural analysis, and thermal analysis of a rotating machine using the finite element method can be performed.

According to the first embodiment, it is possible to automatically generate a numerical analysis model having a winding structure that is relatively close to the design of an actual machine, can be shared by various simulators, and has a winding space taken into consideration.
In the first embodiment, the example has been described in which the radial position of the winding bundle becomes closer to the inner side as it advances in the clockwise direction. Conversely, as the radial position of the winding bundle advances in the clockwise direction, the outer side becomes closer to the outer side. You may comprise so that it may become.

(Embodiment 2)
Since the analysis model generation apparatus 1 according to the second embodiment is different only in the method of determining the center line of the winding bundle, this difference will be mainly described below. In the first embodiment, the method of creating a numerical analysis model in which the winding bundle is inserted into the teeth 42 so that one end side in the circumferential direction of the winding bundle is located radially inside and the other end side is located radially outside has been described. In the second embodiment, an example of concentric circles in which the radial positions of both ends of the winding bundle do not change will be described. In addition, the same code | symbol is attached | subjected to the location corresponding to Embodiment 1, and the detailed description is abbreviate | omitted.

  FIG. 13 is a perspective view conceptually showing an example of the center line 206 of the winding bundle in the second embodiment, and FIG. 14 is a part conceptually showing an example of the center line 206 of the winding bundle in the second embodiment. It is a top view. In the second embodiment, as shown in FIGS. 13 and 14, the radius of the center line 206 of each of the plurality of winding bundles does not change during the spanning and is constant. Specifically, when calculating the representative point, the coordinate value R indicating the position in the radial direction is kept constant, and only the coordinate value θ is changed in the same manner as in the first embodiment, and the final point is calculated from the 0th representative point 261. It is only necessary to calculate up to representative points 262 and connect the representative points with straight lines or curves. For winding bundles at the same radial position, the center line 206 of each winding bundle is created by shifting the winding start position by a specified number of pitches in the circumferential direction, that is, (360 ° / number of slots) × number of pitches. can do. For winding bundles having different radial positions, the center line 206 may be calculated by shifting the radial coordinate value by (R2-R1) / number of pitches.

  FIG. 15 is a partial plan view showing an example of a method for dividing the overhead space 5 in the second embodiment. Similarly to the first embodiment, when the spanning space 5 is divided without a gap between the center lines 206 of adjacent winding bundles, an arcuate space 251 as shown in FIG. 15 is obtained. The following processing is the same as in the first embodiment.

(Modification)
In the above embodiment, an example of creating a numerical analysis model of a brush motor has been described. However, this is merely an example of a winding arrangement, and the winding arrangement is not limited thereto. Hereinafter, as another example, a case where a numerical analysis model of a three-phase rotating machine is created will be described.
FIG. 16 is an explanatory diagram conceptually showing a first example of the winding mode. The top row shown in FIG. 16A shows the numbers of slot numbers 1, 2, 3,. Each row arranged below the uppermost row corresponds to each of the U1 phase, V1 phase, W1 phase, U2 phase, V2 phase, and W2 phase winding bundles, and the hatched band is the winding of the winding bundle. Indicates the position. An up arrow and a down arrow indicate that the winding bundle enters and exits the slot 43. When the number of slots is 24, the number of pitches is 5 (spanning 5 slots 43), 4 poles, the number of winding bundles in each phase is 1, and the number of winding bundles entering and exiting one slot 43 is 1. When the wire bundle is pushed into the teeth 42, a winding mode as shown in FIG. 16B is obtained, and three winding bundles pass through one slot 43. In the lowermost row of FIG. 16B, the number of winding bundles straddling each slot 43 is shown. When creating a numerical analysis model of a three-phase rotating machine with windings wound in this way, it is preferable that the CPU 11 accepts the number of poles via the input device 14 in addition to the number of slots and the number of pitches. Furthermore, the number of winding bundles entering and exiting one slot 43, the number of layers, and the like may be received.
The CPU 11 calculates the number of divisions of the overhead space 5 in the radial direction. The number of divisions is represented by the following formula.
Number of divisions = total number of winding bundles x (number of pitches + number of corrections) / number of slots (1)
Total number of winding bundles = number of poles x number of layers x 3 (number of phases) "(2)
However, when the number of winding bundles entering / exiting one slot 43 is two, the correction number is 0, and when the number of winding bundles entering / exiting one slot 43 is one, the correction number is one. When the number of winding bundles entering and exiting one slot 43 is one, one slot 43 is consumed at the beginning and end of winding of the winding bundle, so the number of slots occupied by one winding bundle is one. In order to add, the correction number is 1.
The number of layers is defined as N / P when the number of winding bundles in a certain phase is N and the number of poles is P. For example, when there are four U-phase winding bundles and four poles, one layer is formed, and when the U-phase winding bundle is eight and four poles, two (= 8/4) layers are formed.

In the example shown in FIG. 16, the total number of winding bundles is 4 poles × 1 layer × 3 = 12, and the number of divisions is 12 × (5 + 1) / 24 = 3. As described above, in the example illustrated in FIG. 16, the CPU 11 divides the overhead space 5 into three in the radial direction. When creating a numerical analysis model in which the windings are wound concentrically, the CPU 11 divides each annular ring divided into three in the radial direction into four in the circumferential direction according to the number of pitches of the winding bundle, as shown in FIG. 16B. 12 arcuate spaces 51 are created. In addition, since FIG. 16B shows the circular overhead space 5 in a strip shape, it is not arcuate, but it is arcuate in the actual numerical analysis model space.
In addition, although the example which winds a coil | winding to a concentric form was demonstrated, when winding a coil | winding in skew shape, the spanning space 5 is divided into 3 in skew shape in radial direction, and the number of poles is 4 in the circumferential direction. Divide it.

FIG. 17 is an explanatory diagram conceptually showing a second example of the winding mode. The top row shown in FIG. 17 shows the numbers of slot numbers 1, 2, 3,... 23, 24 as in FIG. Each row arranged below the top row corresponds to each of the U-phase, V-phase, and W-phase winding bundles, and the hatched band indicates the winding position of the winding bundle. The number of winding bundles straddling each slot 43 is shown. The winding mode shown in FIG. 17 is obtained by setting the number of winding layers of the three-phase rotating machine shown in FIG. If the number of slots is 24, the number of pitches is 6, 4 poles, the number of winding bundles in each phase is 2, and the number of winding bundles entering and exiting one slot 43 is 2, one slot 43 is divided into 6 winding bundles. Will pass.
Note that when the number of slots is 24 and the number of pitches is 6, four U-phase winding bundles cannot be arranged in the circumferential direction, so that the two-layer winding bundle is apparently wound like four layers. It has become. Further, although the number of band-like portions arranged in the same slot number row is seven, one is counted by two winding bundles entering and exiting one slot 43.

  In the example shown in FIG. 17, the total number of winding bundles is 4 poles × 2 layers × 3 = 24, and the number of divisions is 24 × (6 + 0) / 24 = 6. As described above, in the example illustrated in FIG. 17, the CPU 11 divides the overhead space 5 into six in the radial direction. When creating a numerical analysis model in which the windings are wound concentrically, the CPU 11 divides each ring divided into six in the radial direction by a length corresponding to the number of pitches of each winding bundle in the circumferential direction. Create an arc space. In addition, although the example which winds a coil | winding to a concentric form was demonstrated, when winding a coil | winding in skew shape, what is necessary is just to divide the spanning space 5 into four in skew shape in radial direction.

  FIG. 18 is an explanatory diagram conceptually showing a third example of the winding mode. The top row shown in FIG. 18 shows the numbers of slot numbers 1, 2, 3,... 23, 24 as in FIG. Each row arranged below the top row corresponds to each of the U-phase, V-phase, and W-phase winding bundles, and the hatched band indicates the winding position of the winding bundle. The number of winding bundles straddling each slot 43 is shown. When the number of slots is 24 and the number of pitches is 6, as in the example shown in FIG. 17, four U-phase winding bundles cannot be arranged in the circumferential direction. It is like a layer. In the winding mode shown in FIG. 18, the number of winding pitches of the three-phase rotating machine shown in FIG. When the number of slots is 24, the number of pitches is 6, 4 poles, the number of winding bundles of each phase is 1, and the number of winding bundles entering / exiting one slot 43 is one, the number of slots 43 is three to four. The winding bundle will pass.

  In the example shown in FIG. 18, the total number of winding bundles is 4 poles × 1 layer × 3 = 12, and the number of divisions is 12 × (6 + 1) /24=3.5. In this case, the CPU 11 raises the division number 3.5 to 4 and divides the overhead space 5 into 4 in the radial direction. When creating a numerical analysis model in which the windings are wound concentrically, the CPU 11 divides each annular ring divided into four in the radial direction by a length corresponding to the number of pitches of each winding bundle in the circumferential direction. An arcuate space 51 is created. In addition, although the example which winds a coil | winding to a concentric form was demonstrated, when winding a coil | winding in skew shape, what is necessary is just to divide the spanning space 5 into 6 skews in radial direction.

FIG. 19 is an explanatory diagram conceptually showing a fourth example of the winding mode. In the winding mode shown in FIG. 19, the number of pitches of the brush motor shown in the first embodiment is three. The top row shows the numbers of slot numbers 1, 2, 3,. Each row arranged below the uppermost stage corresponds to a plurality of winding bundles, and a hatched band indicates a winding position of the winding bundle. When the number of slots is 20, the number of pitches is 3, and the number of winding bundles entering / exiting one slot 43 is 2, the winding mode is as shown in FIG. 19, and the three winding bundles pass through one slot 43. It will be. In the bottom row, the number of winding bundles straddling each slot 43 is shown.
In this case, the CPU 11 divides the overhead space 5 into three in the radial direction. When the number of winding bundles entering / exiting one slot 43 is 2, the number of divisions is equal to the number of pitches. When the number of winding bundles entering and exiting one slot 43 is 1, the spanning space 5 is divided into four in the radial direction. When the number of winding bundles entering / exiting one slot 43 is 1, the number of divisions is equal to the number of pitches + 1.
As described above, the analysis model generation device, the analysis model generation method, and the computer program according to the present invention can be applied when generating a numerical analysis model of a three-phase rotating machine or other rotating machines.

  The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Analysis model production | generation apparatus 2 Recording medium 3 Communication apparatus 4 Iron core 5 Overhead space 6 Centerline 7 Space in slot 8 Connection space 9 Winding space 11 CPU
12 Internal Storage Device 13 External Storage Device 14 Input Device 15 Output Device 16 Communication Interface 20 Computer Program 41 Back Yoke 42 Teeth 43 Slot 51 Arc Space

Claims (7)

In an analysis model generation device that generates a numerical analysis model of a rotating machine in which a conductive wire is wound around a plurality of teeth constituting an iron core,
Means for receiving information on an annular spanning space in which a conductor is to be bridged across the plurality of teeth on the outer side in the rotation axis direction of the rotating machine from the teeth;
A plurality of winding bundles formed by winding conducting wires around the plurality of teeth, and dividing means for dividing the spanning space into an arcuate space in which the conducting wires of the winding bundle should be bridged without gaps. Model generator. The winding space which comprises the circumferential direction both ends of the arcuate space divided | segmented by the said division | segmentation means, and the space between the teeth in which the said winding bundle should be inserted is provided, The means characterized by the above-mentioned. 1. The analysis model generation device according to 1. The analytical model generation device according to claim 2, wherein the space between the teeth into which the winding bundle is to be inserted has a bar shape. The analysis model generation device according to claim 2, wherein the space between the teeth into which the winding bundle is to be inserted is a space obtained by dividing a space following the shape between the teeth. Means for obtaining the number of pitches indicating the number of conductors to be bridged over the teeth, and the number of teeth;
Means for determining the position of the center line of the winding bundle in the spanning space based on the acquired number of pitches and the number of teeth;
The dividing means includes
The analysis model generation device according to any one of claims 1 to 4, wherein the spanning space is divided at an intermediate position between the center lines of the adjacent winding bundles. In an analysis model generation method for generating a numerical analysis model of a rotating machine in which a conductive wire is wound around a plurality of teeth constituting an iron core,
Accepting information on the annular spanning space in which the conductors should be bridged across the plurality of teeth on the outer side in the rotational axis direction of the rotating machine from the teeth,
A method for generating an analysis model, characterized in that, for each of a plurality of winding bundles formed by winding conducting wires around the plurality of teeth, the spanning space is divided without any gap into an arcuate space in which the conducting wires of the winding bundle are to be spanned. In a computer program for causing a computer to generate a numerical analysis model of a rotating machine in which wires are wound around a plurality of teeth constituting an iron core,
The computer,
Means for receiving information on an annular spanning space in which a conductor is to be bridged across the plurality of teeth on the outer side in the rotation axis direction of the rotating machine from the teeth;
For each of a plurality of winding bundles formed by winding conducting wires around the plurality of teeth, the spanning space is made to function as a dividing unit that divides the winding bundle into arc-shaped spaces in which the conducting wires of the winding bundle are to be spanned without gaps. Computer program.

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