Servo amplifier selection device and servo amplifier selection computer program

Abstract

The present invention provides a servo amplifier selection device and a computer program for servo amplifier selection, which can select an appropriate power cable in a system for driving a motor. The servo amplifier selection device comprises: a storage unit (14) that stores the specifications of each of a plurality of amplifiers capable of supplying power to the motor; an amplifier selection unit (21) that selects a combination of amplifiers connected to the one or more motors from the plurality of amplifiers based on the number of one or more motors specified, the specifications of each of the one or more motors, and the specifications of each of the plurality of amplifiers, so that each of the one or more motors is connected to one of the plurality of amplifiers; and a cable selection unit (22) that selects the specifications of a power cable connecting the amplifier to a power source for each amplifier included in the amplifier combination, so as to meet the power supply required by the motor connected to the amplifier.

Description

Technical Field

[0001] The present invention relates to a servo amplifier selection device and a computer program for selecting a servo amplifier for selecting a cable for power transmission used in a system for driving a motor, for example. Background Art

[0002] In systems that drive motors such as servo motors or spindle motors, in order to properly drive the motors, a power supply device that can supply the motors with sufficient power is required. However, the more motors to be driven, or the more types of motors to be driven, the more difficult it is to select an appropriate power supply device. Therefore, the following technology has been proposed: in order to construct a desired system, the number of amplifiers required is calculated based on the necessary motor model information, and the necessary amplifiers are selected (for example, see Japanese Patent Application Publication No. 2019-57962). Summary of the Invention

[0003] The equipment that supplies power to electric motors includes not only amplifiers but also cables (hereinafter referred to as power cables) that connect between the power supply and amplifier or between the amplifier and the motor to transmit power. Therefore, in systems that drive electric motors, it is necessary to select appropriate power cables.

[0004] In one aspect, an object of the present invention is to provide a servo amplifier selection device capable of selecting an appropriate power cable in a system for driving a motor.

[0005] According to one embodiment, a servo amplifier selection device is provided. The servo amplifier selection device includes: a storage unit (14) storing specifications of a plurality of amplifiers capable of supplying power to a motor; an amplifier selection unit (21) selecting a combination of amplifiers connected to the one or more motors from the plurality of amplifiers based on the number of one or more motors specified, the specifications of the one or more motors, and the specifications of the amplifiers, so that each of the one or more motors is connected to one of the plurality of amplifiers; and a cable selection unit (22) selecting, for each amplifier included in the amplifier combination, the specifications of a power cable connecting the amplifier to a power source so as to meet the power supply required by the motor connected to the amplifier.

[0006] According to another embodiment, a computer program for selecting a servo amplifier is provided. The computer program includes instructions for causing a computer to execute the following steps: selecting a combination of amplifiers connected to the one or more motors from a plurality of amplifiers based on the number of one or more motors specified, the specifications of the one or more motors, and the specifications of a plurality of amplifiers capable of supplying power to the one or more motors stored in a storage unit, so that each of the one or more motors is connected to one of the plurality of amplifiers; and selecting, for each amplifier included in the amplifier combination, the specifications of a power cable connecting the amplifier to a power source so as to meet the power supply requirements of the motor connected to the amplifier.

[0007] According to one aspect, the present invention enables selection of appropriate power cables in a system for driving an electric motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic configuration diagram of a cable selection device as an example of a servo amplifier selection device.

[0009] Figure 2 is a functional block diagram of a processor of a cable selection device.

[0010] Figure 3 This is a diagram showing an example of a cable table used when selecting a power cable connecting a power supply and an amplifier.

[0011] Figure 4 This is a diagram showing an example of a cable table used when selecting a power cable connecting a motor and an amplifier.

[0012] Figure 5 This is a diagram showing an example of the relationship between the motors connected to the respective amplifiers included in the selected amplifier combination and the selected power cables.

[0013] Figure 6 This is a diagram showing an example of a cable table indicating the relationship between combinations of electric motors and power cables according to a modified example.

[0014] Figure 7 This is a diagram showing an example of a tool table.

[0015] Figure 8 This is a flowchart of the cable selection process. DETAILED DESCRIPTION

[0016] The following describes a servo amplifier selection device and a servo amplifier selection computer program executed by the servo amplifier selection device, with reference to the accompanying drawings. The servo amplifier selection device selects a combination of amplifiers for supplying power to the motors based on the number of motors used to construct a desired system, the specifications of each motor, and the specifications of each of a plurality of selectable amplifiers. Based on the selected amplifier combination, the servo amplifier selection device then selects the specifications (e.g., the thickness of the power cables) required for connecting each amplifier included in the combination to a power source, and for connecting each motor to the amplifier. This allows the servo amplifier selection device to appropriately select the power cables used in the desired system. Furthermore, the servo amplifier selection device selects tools suitable for processing power cables of the selected specifications based on the specifications of the selected power cables, by referring to a table showing the relationship between power cable specifications and tools that can be used to process power cables of the selected specifications.

[0017] Figure 1 1 is a schematic diagram of a cable selection device as an example of a servo amplifier selection device. The cable selection device 1 includes an input device 11 , a display device 12 , a communication interface 13 , a memory 14 , and a processor 15 .

[0018] The input device 11 is an example of an input unit, and includes an input device such as a keyboard or a mouse for inputting operation signals. The input device 11 generates an operation signal corresponding to an operation performed by a user and outputs the operation signal to the processor 15 .

[0019] In this embodiment, when the cable selection process starts, information about the motors used to construct the desired system, such as the number of motors, the type of each motor (e.g., servo motor or spindle motor), and the specifications of each motor (hereinafter referred to as "used motor information" for the sake of convenience) is input via the input device 11. In addition, the desired system can be any of various systems that utilize motors, such as machine tools, robots, or production equipment. In addition, the specifications of each motor include, for example, the power consumption, rated current, or size of the motor. Furthermore, the input device 11 generates an operation signal representing the input used motor information and outputs the operation signal to the processor 15.

[0020] Furthermore, during the cable selection process, restriction information indicating restriction conditions for amplifier selection may be input via the input device 11. The restriction information may include, for example, the size of the amplifier installation site or the upper limit of the amplifier acquisition cost. The input device 11 then generates an operation signal including the restriction information and outputs the operation signal to the processor 15.

[0021] The display device 12 is an example of a display unit, and includes, for example, a liquid crystal display or an organic EL display. Furthermore, the display device 12 displays information such as the type or form of each selected amplifier, the specifications of each selected power cable (or physical characteristics corresponding to such specifications), and the type of tool selected, in accordance with a display signal received from the processor 15.

[0022] Furthermore, the input device 11 and the display device 12 may be configured as a device such as a touch screen in which an input device and a display device are integrated.

[0023] The communication interface 13 is another example of an input unit, and includes, for example, a communication interface for connecting the cable selection device 1 to other devices. Furthermore, for example, when motor usage information and restriction information are input via other devices, the communication interface 13 transmits the motor usage information and restriction information received from the other devices to the processor 15. Furthermore, the communication interface 13 may also output information indicating the type of each selected amplifier, the specifications of each selected power cable, and the type of selected tool, etc., received from the processor 15 as a result of the cable selection process, to the other devices.

[0024] The memory 14 is an example of a storage unit and includes, for example, a readable and writable semiconductor memory and a read-only semiconductor memory. Alternatively, the memory 14 may include a storage medium such as a semiconductor memory card, a hard disk, or an optical storage medium and a device for accessing the storage medium.

[0025] The memory 14 stores various information used in the cable selection process executed by the processor 15 of the cable selection device 1. This information includes, for example, amplifier information showing the specifications of each of a plurality of selectable amplifiers (e.g., the type and number of connectable motors, amplifier capacity, and size), and a table (hereinafter, for ease of explanation, referred to as a cable table) that shows the relationship between power cable specifications (e.g., cable thickness, continuous current rating, etc.) and usable amplifiers, usable motor types, or motor combinations. Furthermore, the information used in the cable selection process includes a table showing, for each selectable tool, the specifications of the power cables that can be processed using that tool (hereinafter, for ease of explanation, referred to as a tool table).

[0026] The processor 15 includes, for example, one or more central processing units (CPUs) and their peripheral circuits. Furthermore, the processor 15 may include a processor for logical operations and a processor for numerical operations. Furthermore, the processor 15 performs cable selection processing to select amplifier combinations, power cable specifications, and tools that can be used for one or more motors specified by the motor information.

[0027] Figure 2 This is a functional block diagram of the processor 15 associated with the cable selection process. The processor 15 includes an amplifier selection unit 21, a cable selection unit 22, a tool selection unit 23, and a display control unit 24. These components of the processor 15 are, for example, functional modules implemented by a computer program executed on the processor 15. Alternatively, these components may be implemented as dedicated arithmetic circuits incorporated into a portion of the processor 15.

[0028] The amplifier selector 21 selects a combination of amplifiers to supply power to each motor from among the multiple selectable amplifiers, based on the number of motors specified by the motor information, the specifications of each motor, and the specifications of each amplifier, so that each motor is connected to a specific amplifier. To this end, the amplifier selector 21 selects the amplifier combination using, for example, a method similar to that disclosed in Japanese Patent Application Laid-Open No. 2019-57962. Specifically, the amplifier selector 21 refers to the amplifier information and, for each amplifier, determines which motor, from the one or more motors specified by the motor information, is to be connected to that amplifier, such that the number of motors connected to that amplifier is less than the maximum number of motors that can be connected to that amplifier and the total power consumption of the motors connected to that amplifier is less than the amplifier capacity of that amplifier. Furthermore, the amplifier selector 21 selects a combination of amplifiers to supply power to each motor so that all motors specified by the motor information are connected to a specific amplifier. In this case, the amplifier selector 21 may select the amplifier combination to minimize the number of selected amplifiers or to minimize the total amplifier capacity of each selected amplifier.

[0029] Furthermore, there are also amplifiers (hereinafter referred to as separate amplifiers for ease of explanation) that are separate and independently selectable: a portion comprising an AC / DC converter for converting AC power from a power supply into DC power (hereinafter referred to as a power supply unit) and a portion comprising an inverter for converting DC power into AC power for supply to the motor (hereinafter referred to as an inverter unit). For this separate amplifier, the amplifier selector 21 selects a power supply unit with an amplifier capacity greater than the sum of the power consumption of each motor connected to the inverter unit.

[0030] Furthermore, when restriction information is input, the amplifier selector 21 may select an amplifier combination so as to satisfy the conditions specified by the restriction information. For example, if the restriction information includes the size of the amplifier installation site, the amplifier selector 21 may select the amplifier combination so that the total installation size of the individual amplifiers included in the selected amplifier combination is less than or equal to the size of the amplifier installation site. Alternatively, if the restriction information includes an upper limit for amplifier acquisition costs, the amplifier selector 21 may select the amplifier combination so that the total acquisition cost of the individual amplifiers included in the selected amplifier combination is less than or equal to the upper limit for amplifier acquisition costs. Furthermore, if the restriction information includes a margin value for amplifier capacity for separate amplifiers, the amplifier selector 21 may select the power supply unit so that the difference between the sum of the power consumption of the individual motors connected to the inverter unit and the amplifier capacity of the power supply unit is greater than or equal to the margin value.

[0031] To select the amplifier combination as described above, the amplifier selection unit 21 may select the amplifier combination according to, for example, a round-robin method, or may select the amplifier combination according to any of various optimization methods for optimizing the combination, such as a dynamic programming method or a genetic algorithm.

[0032] The amplifier selection unit 21 notifies the cable selection unit 22 and the display control unit 24 of the combination of motors connected to the selected amplifier combination and each amplifier included in the amplifier combination.

[0033] The cable selection unit 22 selects the specifications of the power cables used to connect the amplifiers to the power source for each amplifier included in the selected amplifier combination notified by the amplifier selection unit 21, so as to meet the power supply requirements of the motor connected to the amplifier. Furthermore, the cable selection unit 22 selects the specifications of the power cables used to connect the motors to the amplifiers for each motor, so as to meet the power supply requirements of the motors.

[0034] In this embodiment, the cable selection unit 22 refers to the cable table for each amplifier included in the selected amplifier combination and selects the thickness of the power cable corresponding to that amplifier as the specification of the power cable connecting the power source to the amplifier. Furthermore, the cable selection unit 22 refers to the cable table for each motor and selects the thickness of the power cable corresponding to that motor as the specification of the power cable connecting the motor to the amplifier.

[0035] Figure 3This is a diagram showing an example of a cable table used when selecting the specifications of the power cable connecting the power supply and the amplifier. Figure 3 Cable table 300, shown, lists the specifications (power cable thickness) of the power cables that can be used when connecting each amplifier to a power source, according to the amplifier type. For example, cable table 300 associates each amplifier with a power cable thickness that can transmit power corresponding to the amplifier capacity of that amplifier. Furthermore, for separate amplifiers, the power supply unit and power cable thickness are associated. Thus, cable selection unit 22 can refer to cable table 300 to determine the power cable thickness associated with the amplifier in question and, thereby, select a power cable thickness for connecting the amplifier to the power source that satisfies the power supply requirements for each motor connected to the amplifier.

[0036] Figure 4 FIG. 1 is a diagram showing an example of a cable table used when selecting a power cable connecting a motor and an amplifier. Figure 4 Cable table 400, shown, lists the corresponding motors by power cable thickness. For example, cable table 400 associates each motor with a power cable thickness that can transmit power corresponding to the motor's power consumption. Thus, cable selection unit 22 can refer to cable table 400 to determine the power cable thickness associated with the motor in question and, thereby, select the power cable thickness to connect the motor to the amplifier.

[0037] Figure 5 This is a diagram showing an example of the relationship between the motor connected to each amplifier included in the selected amplifier combination and the thickness of the selected power cable.

[0038] exist Figure 5 In the system 500 shown for driving three motors 521 to 523, the combination of amplifiers is selected such that two amplifiers 511 and 512 are connected in parallel to a power supply 501, two motors 521 and 522 are connected to the amplifier 511, and one motor 523 is connected to the amplifier 512. Figure 5 In the example, for simplicity, the power cables connecting each amplifier to the power source and the power cables connecting each motor to the amplifier are each represented by one line regardless of the actual number of cables. Figure 3 The amplifier βiSV40 / 40-B is registered in the cable table 300 shown in FIG. 1 , and the amplifier 512 is a separate amplifier including a power supply unit αiPS11-B registered in the cable table 300. Figure 4The βiF22 / 2000-B registered in the cable table 400 shown in the figure, and the motor 523 is αiI8 / 8000-B registered in the cable table 400 .

[0039] In this example, the cable selection unit 22 refers to the cable table 300 to determine the thickness of the power cable corresponding to the amplifier 511. The cable selection unit 22 then selects the determined thickness of the power cable as the thickness of the power cable connecting the power source 501 and the amplifier 511. In this example, the amplifier 511 is βiSV40 / 40-B, so the thickness of the power cable that can be used is determined to be 1.25 [mm 2 Therefore, the cable selection unit 22 selects the cable having a thickness of 1.25 [mm 2 ] or above (e.g., a power cable with a thickness of 1.25 [mm 2 ] or 2[mm 2 ] power cable) is selected as the power cable connecting the power source 501 and the amplifier 511. Similarly, the amplifier 512 is αiPS11-B, so the thickness of the power cable that can be used is determined to be 8 [mm 2 Therefore, the cable selection unit 22 selects the cable having a thickness of 8 [mm 2 ]The above power cable is selected as the power cable connecting the power supply 501 and the amplifier 512.

[0040] Furthermore, the cable selection unit 22 refers to the cable table 400 to determine the thickness of the power cables corresponding to the motors 521 and 522. The cable selection unit 22 then selects the determined thickness of the power cables as the thickness of the power cables connecting the motors 521 and 522 to the amplifier 511. In this example, the motors 521 and 522 are βiF22 / 2000-B, respectively. Therefore, the thickness of the power cables that can be used is determined to be 1.25 [mm 2 Therefore, the cable selection unit 22 selects the cable having a thickness of 1.25 [mm 2 The above power cables are selected as the power cables connecting the motors 521 and 522 to the amplifier 511. Similarly, the motor 523 is αiI8 / 8000-B, so the thickness of the power cable that can be used is determined to be 8 [mm 2 Therefore, the cable selection unit 22 selects the cable having a thickness of 8 [mm 2 ]The above power cable is selected as the power cable connecting the motor 523 and the amplifier 512.

[0041] According to a modified example, the cable selection unit 22 may determine the thickness of the power cable connecting the power supply and the amplifier based on the sum of the power consumption of the motors connected to the amplifier. In this case, a table representing the relationship between motor combinations and power cable thickness is used as the cable table.

[0042] Figure 6 FIG. 1 is a diagram showing an example of a cable table showing the relationship between the combination of motors and the thickness of power cables according to this modification. Figure 6 Cable table 600, shown, shows corresponding motor combinations according to power cable thickness. For example, cable table 600 associates each motor combination with a power cable thickness that can transmit power corresponding to the sum of the power consumption of that combination. Therefore, cable selector 22 refers to cable table 600 and, for each amplifier included in the selected amplifier combination, determines the power cable thickness associated with the motor combination connected to that amplifier. This allows cable selector 22 to select, for each amplifier, a power cable thickness connecting that amplifier to the power source to ensure sufficient power supply to each motor connected to that amplifier.

[0043] For example, refer again to Figure 5 .exist Figure 5 In the system 500 shown, the two motors 521 and 522 connected to the amplifier 511 are both set to βiS1 / 6000-B. In this case, by referring to the cable table 600, it can be determined that the thickness of the power cable that can be used for the combination of two motors of βiS1 / 6000-B is 1 [mm 2 Therefore, the cable selection unit 22 selects the cable having a thickness of 1 [mm 2 ]The above power cable can be selected as the power cable connecting the power supply 501 and the amplifier 511.

[0044] According to this variation, if the combined power consumption of the motors connected to the amplifier is less than the amplifier capacity of the amplifier, cable selection unit 22 can select a power cable thinner than the power cable corresponding to the amplifier capacity as the power cable connecting the amplifier to the power source. This reduces the cost of acquiring the power cable. In other words, cable selection unit 22 can select a more appropriate power cable for the combination of motors connected to the amplifier.

[0045] Furthermore, according to another variation, a cable table may be pre-stored in memory 14, indicating the relationship between each power cable thickness and the total power consumption of the motors corresponding to that thickness. In this case, cable selection unit 22 refers to this cable table for each amplifier included in the selected amplifier combination, determines the power cable thickness corresponding to the total power consumption of the motors connected to that amplifier, and selects a power cable having the determined thickness or a thickness greater than that determined. Thus, cable selection unit 22 can select a power cable thickness for connecting the amplifier to the power source that satisfies the power supply requirements for the motors connected to the amplifier. In this case, even when the total power consumption of the motors connected to the amplifier is less than the amplifier capacity of the amplifier, cable selection unit 22 can select a power cable thinner than the power cable thickness corresponding to the amplifier capacity as the power cable connecting the amplifier to the power source.

[0046] Furthermore, the specifications of the selected power cable are not limited to the thickness of the power cable. The specifications of the power cable may also be, for example, a continuous rated current value or a combination of thickness and continuous rated current value. In this case, in each of the cable tables described above, a physical characteristic value or a combination of physical characteristic values (e.g., a continuous rated current value or a combination of thickness and continuous rated current value) corresponding to the specification to be selected can be used instead of the thickness of the power cable. Then, the cable selection unit 22 selects the specifications of the power cable connecting the amplifier to the power supply and the specifications of the power cable connecting the motor to the amplifier, referring to the cable table, similarly to the above-described embodiment or modification.

[0047] The cable selection unit 22 notifies the tool selection unit 23 and the display control unit 24 of the specifications of all the selected power cables.

[0048] The tool selection unit 23 selects one or more tools (e.g., crimping tools or wire strippers) for processing all selected power cables of various specifications. In this embodiment, the tool selection unit 23 refers to a tool table to select one or more tools, so that any tool can be used to process each selected power cable of various specifications.

[0049] Figure 7 FIG is a diagram showing an example of a tool table. Figure 7 In the tool table 700 shown, the thickness of the power cable that can be processed by the tool is shown for each selectable tool. For example, it is shown that tool A can process a thickness of 0.75 [mm 2 ] power cables and 1.25[mm thick 2 ] power cables. In addition, it is shown that tool B can process a thickness of 1.25 [mm 2] power cables and 2[mm thick 2 ] power cables.

[0050] The tool selection unit 23 selects one or more tools, for example, in such a way as to minimize the number of selected tools. Alternatively, the tool selection unit 23 may select one or more tools in such a way as to maximize the number of tools already owned by the user. In this case, owned tool information indicating the tools owned by the user among the selectable tools is pre-stored in the memory 14. The tool selection unit 23 then selects one or more tools with reference to the tool table and the owned tool information. Alternatively, the tool selection unit 23 may select tools in such a way as to minimize the total acquisition cost of the one or more selected tools. In this case, tool cost information indicating the acquisition cost for each selectable tool is pre-stored in the memory 14. The tool selection unit 23 then selects one or more tools with reference to the tool table and the tool cost information.

[0051] To select one or more tools as described above, the tool selection unit 23 may select each tool according to, for example, a round-robin method, or may select each tool according to any of various optimization methods for optimizing a combination, such as dynamic programming or a genetic algorithm.

[0052] The tool selection unit 23 notifies the display control unit 24 of information indicating each selected tool.

[0053] The display control unit 24 displays information on the display device 12 indicating the selected amplifier combination, the specifications (e.g., thickness or continuous current rating) of the power cables connecting each amplifier included in the combination to the power supply, and the specifications of the power cables connecting each motor to the amplifier. In this case, the display control unit 24 may display, for example, a list of the motor combinations connected to each amplifier, the specifications of the power cables connecting the amplifier to the power supply, and the specifications of the power cables connecting each motor to the amplifier on the display device 12. Alternatively, the display control unit 24 may generate an image showing the connection relationship between the selected amplifier combination and the motors included in the combination in another display format, such as a graphic representing the amplifier (e.g., a rectangle), and display the name of each motor together with a graphic representing the motor (e.g., a circle). Furthermore, the display control unit 24 may display the specifications of a power cable near a graphic (e.g., a line) representing a power cable connecting an amplifier to a power source in the image. Similarly, the display control unit 24 may display the specifications of a power cable near a graphic (e.g., a line) representing a power cable connecting a motor to an amplifier in the image. Furthermore, the size, color, or brightness of the graphic representing the power cable may be varied depending on the power cable's specifications. For example, the thicker the power cable, the thicker the line representing the power cable.

[0054] Then, the display control unit 24 causes the display device 12 to display information indicating each selected tool, for example, the names of each of these tools.

[0055] Figure 8 The processor 15 executes the cable selection process according to the following operation flowchart.

[0056] The amplifier selection unit 21 of the processor 15 selects a combination of amplifiers that can be used to supply power to one or more specified motors from a plurality of amplifiers according to the number of motors specified by the used motor information, the specifications of each motor, and the specifications of each amplifier (step S101).

[0057] The cable selection unit 22 of the processor 15 selects the specifications of the power cables used to connect the amplifiers to the power supply for each amplifier included in the selected amplifier combination (step S102). Furthermore, the cable selection unit 22 selects the specifications of the power cables used to connect the motors to the amplifiers for each motor (step S103).

[0058] The tool selection unit 23 of the processor 15 refers to the tool table and selects one or more tools that can process all the selected power cables (step S104 ).

[0059] The display control unit 24 of the processor 15 displays information on the display device 12 indicating the selected amplifier combination, the specifications of the power cables connecting each amplifier in the combination to the power source, and the specifications of the power cables connecting each motor to the amplifier (step S105). Furthermore, the display control unit 24 displays information on the display device 12 indicating each selected tool (step S106). The processor 15 then terminates the cable selection process.

[0060] As described above, a cable selection device, an example of a servo amplifier selection device, selects a combination of amplifiers to connect to each motor based on the number of motors used to construct a desired system for driving the motors, the specifications of each motor, and the specifications of multiple available amplifiers. Based on this selection, the cable selection device selects the specifications of the power cables used to connect each amplifier included in the amplifier combination to a power source, as well as the specifications of the power cables used to connect each motor to the amplifier. Therefore, the cable selection device can automatically select appropriate power cables for the desired system. Furthermore, the cable selection device can automatically select one or more tools capable of processing each selected power cable. Furthermore, the cable selection device can notify the user of the selected amplifiers, the specifications of each power cable, and the one or more tools. Consequently, the cable selection device can significantly reduce the time required to prepare power cables and tools.

[0061] In addition, when it is not necessary to select a tool, the processing of the tool selection unit 23 may be omitted. In this case, the tool selection unit 23 may be omitted. Figure 8 The processes of step S104 and step S106 in the cable selection process are shown. If it is not necessary to select the specifications of the power cables connecting the motors to the amplifiers, the process of step S103 in the cable selection process may be omitted.

[0062] In addition, the display control unit 24 may display only the selected combination of amplifiers, the specifications of each power cable, and any one of the tools on the display device 12. For example, the display control unit 24 may display only the thickness of each selected power cable on the display device 12. Alternatively, if the information indicating the selected combination of amplifiers, the thickness of each power cable, and the tool is output to another device via the communication interface 13 or stored in the memory 14, the processing of the display control unit 24 may be omitted. In this case, the display control unit 24 may be omitted. Figure 8 The processes of step S105 and step S106 in the cable selection process shown.

[0063] Furthermore, the computer program for realizing the functions of the various components of the processor 15 of the cable selection device 1 according to the above-described embodiment or modification may be provided in a form recorded in a computer-readable portable recording medium such as a semiconductor memory, a magnetic recording medium, or an optical recording medium.

[0064] All examples and specific terms listed herein are intended to be illustrative for the purpose of helping the reader understand the present invention and the concepts contributed by the inventors to the advancement of the technology, and should be interpreted as not being limited to the structure of any example in this specification related to the advantages and disadvantages of the present invention, such specific examples and conditions. Although the embodiments of the present invention are described in detail, it should be understood that various changes, substitutions and modifications can be made thereto without departing from the spirit and scope of the present invention.

Claims

1. A servo amplifier selection device comprising: a storage unit storing specifications of each of a plurality of amplifiers capable of supplying electric power to the motor; an amplifier selection unit that selects a combination of amplifiers to be connected to the one or more motors from among the plurality of amplifiers based on the number of the designated one or more motors, the specifications of each of the one or more motors, and the specifications of each of the plurality of amplifiers, so that each of the one or more motors is connected to one of the plurality of amplifiers; and A cable selection unit selects, for each amplifier included in the amplifier combination, a specification of a power cable connecting the amplifier to a power source so as to satisfy power supply required by the one or more motors connected to the amplifier.

2. The servo amplifier selection device according to claim 1, wherein: The storage unit further stores a first table indicating, for each of the plurality of amplifiers, specifications of power cables that can be used to supply power to the amplifier. The cable selection unit refers to the first table and selects the specification of a power cable connecting each amplifier included in the amplifier combination to a power source.

3. The servo amplifier selection device according to claim 1, wherein: The storage unit further stores a second table in which combinations of motors corresponding to the specifications of the power cables are indicated. The cable selection unit refers to the second table for each amplifier included in the amplifier combination and selects the specifications of the power cable corresponding to the combination of motors among the one or more motors connected to the amplifier as the specifications of the power cable connecting the amplifier and the power supply.

4. The servo amplifier selection device according to claim 1, wherein: The storage unit further stores a third table in which the maximum power consumption corresponding to the specification of the power cable is indicated. The cable selection unit refers to the third table for each amplifier included in the amplifier combination to select the specifications of the power cable whose sum of power consumption of each motor among the one or more motors connected to the amplifier is less than the maximum value of the power consumption as the specifications of the power cable connecting the amplifier and the power supply.

5. The servo amplifier selection device according to any one of claims 1 to 4, wherein: The storage unit further stores a fourth table indicating, for each of the one or more electric motors, specifications of power cables that can be used to supply power to the electric motors. The cable selection unit refers to the fourth table for each of the one or more motors and selects a specification of a power cable connecting the amplifier connected to the motor in the combination of the motor and the amplifier.

6. The servo amplifier selection device according to claim 5, wherein: The storage unit further stores a tool table in which, for each of a plurality of tools capable of processing a power cable, a specification of the power cable that can be processed by the tool is indicated. The servo amplifier selection device also has a tool selection unit, which is used to select one or more tools from the multiple tools for processing the following power cables respectively, wherein the power cables are: power cables of specifications selected for connecting each amplifier included in the amplifier combination to a power supply; and power cables of specifications selected for connecting each motor among the one or more motors to an amplifier included in the amplifier combination.

7. A computer-readable storage medium having a computer program for selecting a servo amplifier recorded thereon, the computer program for selecting a servo amplifier being configured to cause a computer to execute the following steps: Based on the number of the designated one or more motors and the specifications of each of the one or more motors and the specifications of each of a plurality of amplifiers that can supply power to the one or more motors and stored in a storage unit, a combination of amplifiers to be connected to the one or more motors is selected from the plurality of amplifiers so that each of the one or more motors is connected to one of the plurality of amplifiers. For each amplifier included in the amplifier combination, the specification of a power cable connecting the amplifier to a power source is selected so as to satisfy the power supply required by the one or more motors connected to the amplifier.

8. A computer program product comprising a servo amplifier selection computer program, the servo amplifier selection computer program being configured to cause a computer to execute the following steps: Based on the number of the designated one or more motors and the specifications of each of the one or more motors and the specifications of each of a plurality of amplifiers that can supply power to the one or more motors and stored in a storage unit, a combination of amplifiers to be connected to the one or more motors is selected from the plurality of amplifiers so that each of the one or more motors is connected to one of the plurality of amplifiers. For each amplifier included in the amplifier combination, the specification of a power cable connecting the amplifier to a power source is selected so as to satisfy the power supply required by the one or more motors connected to the amplifier.

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