JP2021035097A - Power conversion device, motor control system, and motor control program - Google Patents

Abstract

To provide a power conversion device which can perform an operation desired by a user.SOLUTION: In a motor control system 300, a power conversion device 200 supplies power to a motor 7, and includes a motor control unit 12 that controls the motor 7, a simple PLC unit 13 that controls the motor control unit 12 in accordance with a sequence program, and an external communication unit 10 that performs transmission of information between the power conversion device 200 and an external computer (cloud server 100). The simple PLC unit 13 receives the sequence program generated by the external computer via the external communication unit 10 on the basis of information, which includes the operation state of the motor 7, collected by the power conversion device 200, and outputs an operation command for the motor control unit 12 in accordance with the received sequence program.SELECTED DRAWING: Figure 1

Description

The present invention relates to a power converter, a motor control system and a motor control program.

With the increasing demand for energy saving in the market, it is common to use a power converter having a function of adjusting the optimum rotation speed, motor output, etc. according to the operating state of a motor often used as a power source. The power conversion device includes not only those provided in machine tools and robots, but also servos and inverters controlled by a controller. Further, the power converter may be used for controlling a fan, a pump, an air conditioner, etc. without being connected to a network. When operating such a power conversion device in conjunction with a sensor, a push button switch, or the like, it is necessary to form a sequence. It is common practice to combine switches, contactors, lamps, AC200 (Alternating Current) V-compatible sensors, power, etc. to form a sequence circuit that moves a plurality of devices in conjunction with each other on a control panel. However, it must be able to be covered by a relatively simple movement such as ON / OFF, and in order to combine complicated feedback control and a plurality of sensors with a plurality of conditions and cause the power converter to perform an arbitrary operation, it is necessary. Equipment such as a PLC (Programmable Logical Controller) and a motion controller is required outside the power conversion device.

These devices are used in many mechanical devices because they realize the desired operation of sequence processing by combining complicated combination conditions with software. For this reason, while it is complicated to assemble with a sequence circuit, in applications that are not as complicated as using a PLC, using an external PLC results in excessive functions, which increases the grounding area of the equipment and the introduction cost of the equipment. There was a challenge.

In response to such a problem, Non-Patent Document 1 discloses a power conversion device having a function close to that of a PLC (simple PLC function). According to the simple PLC function, it is possible to customize the control required for the user's mechanical device, the control required for the user's desired application, and the like.

"FRENIC-Ace Customized Logic Function" [Searched on July 24, 1st year of Reiwa] Internet <URL: https://www.fujielectric.co.jp/products/inverter/frenic-ace/>

However, since users who design control panels and the like using a power conversion device are often not experts in software, it is not easy to freely handle the simple PLC function. Therefore, there is a problem that the operation desired by the user may not be realized.

The present invention has been made in view of the above, and an object of the present invention is to obtain a power conversion device capable of realizing an operation desired by a user.

In order to solve the above-mentioned problems and achieve the object, the power conversion device according to the present invention is a power conversion device that supplies power to a motor, and is a motor control unit that controls the motor and the motor according to a sequence program. It includes a PLC unit that controls the control unit and a communication unit that transmits information between the external computer of the power conversion device, and is based on the information collected by the power conversion device including the operating state of the motor. Then, the sequence program generated by the external computer is input via the communication unit, and the operation command of the motor control unit is generated according to the input sequence program.

According to the present invention, there is an effect that the operation desired by the user can be realized.

Configuration diagram of a motor control system having a power conversion device according to an embodiment of the present invention. Diagram to explain the virtualized environment of the cloud server The figure which shows the configuration example of the motor control part Diagram for explaining the diagnostic operation of the motor control system Diagram showing applications and operating patterns to which the motor control system is applied Diagram showing an example of driving pattern Diagram for explaining the operation of automatically adjusting the speed pattern The figure which shows the functional block of the simple PLC part Diagram showing an example of a lookup table The figure which shows the structural example of the 1st motor control system which concerns on a comparative example. The figure which shows the configuration example of the 2nd motor control system which concerns on a comparative example.

Hereinafter, the power conversion device, the motor control system, and the motor control program according to the embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

Embodiment FIG. 1 is a block diagram of a motor control system having a power conversion device according to an embodiment of the present invention. FIG. 2 is a diagram for explaining a virtual environment of a cloud server. FIG. 3 is a diagram showing a configuration example of the motor control unit.

The motor control system 300 shown in FIG. 1 includes a cloud server 100 and a power conversion device 200.

The cloud server 100 includes an external communication unit 1, a data collection unit 2, a data storage unit 3, a data analysis unit 4, and a program generation unit 5.

The cloud server 100 operates a virtual machine, for example, by installing virtual machine software (virtualization application) stored in a memory by a CPU. As shown in FIG. 2, the virtual machine software installs individual OSs by emulating individual hardware on the host OS. This allows multiple virtual machines to run independently of each other on a single system. In addition, OS such as Linux (registered trademark) controls applications etc. installed in the machine by the central part of the OS called kernel, but software technology that virtualizes the kernel part (Docker (registered trademark) etc.) Also exists. In this cloud environment, software for collecting data from the power converter 200 (collection software), software for analyzing the data (analysis software), etc. are constructed, and further, simple PLC code, setting value generation software, etc. are constructed. To. By using this virtualization technology, efficient use of resources, reduction of initial hardware investment cost, power saving and space saving can be realized.

Returning to FIG. 1, the external communication unit 1 is a communication means for transmitting information to and from the power conversion device 200. The external communication unit 1 is connected to a communication line 60 compliant with communication standards such as Ethernet (registered trademark), RS485, Wi-Fi (registered trademark), and Bluetooth (registered trademark). The communication line 60 includes an Internet network, a mobile phone network, and the like. The mobile phone network is a wireless communication line such as 3G (Third Generation), 4G (Fourth Generation), LTE (Long Term Evolution), or 5G (Fifth Generation). In the present embodiment, it is assumed that the external communication unit 1 is connected to the external communication unit 10 of the power conversion device 200 at least via the Internet network. The external communication unit 1 and the external communication unit 10 allow conversion of the physical layer and change and switching of the IP address in the IP network on the header.

The data collection unit 2, which is a function realized by the collection software, inputs the information of the power conversion device 200 via the external communication unit 10 of the power conversion device and stores it in the data storage unit 3. The information of the power converter 200 is, for example, information indicating values such as current, voltage, torque, speed, fin temperature, substrate temperature, DC intermediate voltage, operating time, command speed, and command torque. The information of the power conversion device 200 is collected and stored by, for example, the information collection unit 15 (information storage unit composed of a sensor and a memory) in the power conversion device 200, and then transmitted to the cloud server 100.

The current is, for example, an alternating current input to a rectifier circuit (not shown), a direct current input from the rectifier circuit (not shown) to the inverter circuit 12c of FIG. 3, an alternating current supplied from the inverter circuit 12c to the motor 7. is there. The motor 7 is an example of a controlled device of the power conversion device 200. The voltage is, for example, an AC voltage input to a rectifier circuit (not shown), an AC voltage supplied from the inverter circuit 12c of FIG. 3 to the motor 7, and the like. The fin temperature is, for example, a temperature detected by a temperature sensor that detects the temperature of the heat radiating fin provided in the inverter circuit 12c of FIG. 3 or the like. The substrate temperature is, for example, the temperature detected by the temperature sensor that detects the ambient temperature of the substrate on which the inverter circuit 12c of FIG. 3 is mounted. The DC intermediate voltage is a voltage applied to the DC bus between the rectifier circuit (not shown) and the inverter circuit 12c of FIG. The operating time is the cumulative time from the time when the power of the power conversion device 200 is turned on.

When the power conversion device 200 obtains information such as the ambient temperature, humidity, and amount of light of the power conversion device 200 by using a communication device conforming to the BLE (Bluetooth Low Energy) communication standard, for example, the power is generated. The information of the conversion device 200 may include such information.

The data analysis unit 4 is a function realized by analysis software. The details of the data analysis unit 4 will be described later. The program generation unit 5 generates a program (or parameter) by the following method. For example, the data analysis unit 4 analyzes the parameters and the optimum values of the table used for the program for each application defined in advance, and the program generation unit 5 generates a program using the analysis result.

Further, as another program generation method, when a person adjusts the speed by using an operation timing or the like as a trigger, the program generation unit 5 collects statistics on the timing and creates a program that simulates the operation itself. For example, if the operator performs an operation of increasing the rotation speed of the motor 7 every morning from 7:00 to 8:00 and decreasing the rotation speed of the motor 7 around 17:00, the program generation unit 5 performs this operation for a time. Generates a program that automatically adjusts the speed by associating with the rotation speed.

The program generated by the program generation unit 5 may be text format data such as XML or JSON (Javascript (registered trademark) Object Notification), or may be reduced to the level of assembly language, or may be reduced to the level of assembly language, or via a PC setting tool or the like. You may convert it. Further, the program may be set as a code that can be interpreted by an interpreter or the like that can be directly interpreted by the power converter 200 on the cloud side. The generated program is not automatically reflected in the control, but goes through the process of confirming with the user once, but it may be set automatically. The user may readjust the generated program.

Next, the configuration of the power conversion device 200 will be described. The power conversion device 200 includes an external communication unit 10, a command generation unit 11, a motor control unit 12, a simple PLC unit 13, a program storage unit 14, and an information collection unit 15. In addition to these functions, the power conversion device 200 may include a cache unit that temporarily stores information, an access monitoring unit that manages to prevent unauthorized access from the outside, and the like.

The conventional power conversion device has only a function of performing a process for rotating the motor 7 based on an external command, and does not include a simple PLC unit 13 and an information collecting unit 15.

The external communication unit 10 is a communication means for transmitting / receiving information to / from the external communication unit 1 via the communication line 60. The external communication unit 10 is configured in the same manner as the external communication unit 1. The external communication unit 10 may transmit data to the cloud server 100 through, for example, a wireless router provided in the vicinity of the power conversion device 200.

The command generation unit 11 generates, for example, a command speed for commanding the rotation speed of the rotor of the motor 7, a command torque for generating a desired rotation torque in the motor, and the generated commands for the motor shown in FIG. Input to the motor control circuit 12a of the control unit 12. The motor control circuit 12a of the motor control unit 12 generates a PWM signal according to the input command and inputs it to the drive signal generation circuit 12b. The drive signal generation circuit 12b amplifies the input PWM signal and inputs it to the inverter circuit 12c as a drive signal. The inverter circuit 12c is called a main circuit and includes a plurality of switching elements. By repeating the on / off operation of the plurality of switch elements according to the drive signal, the DC voltage input to the inverter circuit 12c is converted into an AC voltage and input to the motor 7.

Returning to FIG. 1, the program storage unit 14 includes a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EEPROM (Electrically Erasable and Programmable ROM), and a FRAM (registered trademark) for temporarily storing data. It is composed of memory such as RAM (registered trademark). Further, the program storage unit 14 may be, for example, an optical storage medium or a magnetic storage medium. The program storage unit 14 stores, for example, a sequence program generated by the program generation unit 5 of the cloud server 100, information indicating the selection result of the optimum template, and the like. A sequence program is composed of a combination of a plurality of minimum unit instructions that perform a specific process. An instruction has an attribute called an execution condition, and the necessity of executing the instruction is determined by the execution condition and the result of a logical expression that performs some calculation on the immediately preceding instruction.

The simple PLC unit 13 is a device having the above-mentioned simple PLC function. The simple PLC unit 13 inputs information collected by various sensors in the power converter 200 based on the sequence program stored in the program storage unit 14, so as to provide the optimum operation of the motor 7. It outputs signals such as command speed and command torque to command the motor control unit 12. In FIG. 1, the simple PLC unit 13 is connected to the command generation unit 11, but in the power conversion device 200, the simple PLC unit 13 mainly controls the motor control unit 12, so that the simple PLC unit 13 is used. The output of is input to the motor control unit 12. The simple PLC unit 13 is handled, for example, by a program storage unit that temporarily stores a sequence program, a program execution unit that is a functional unit that executes a sequence program read from the program storage unit, and arithmetic processing by the sequence program. It is provided with a data storage unit for storing arithmetic data.

The information collecting unit 15 collects, for example, information on the power conversion device 200 described above. In addition to the information of the power conversion device 200, the information collecting unit 15 may collect, for example, information on the usage set by the user, information on a predetermined template, information on the setting contents, and the like. The information regarding the use is information indicating the use of the power conversion device 200 such as winding, winding, pump drive, fan drive, and transfer.

Next, the operation of the motor control system 300 will be described. FIG. 4 is a diagram for explaining the diagnostic operation of the motor control system.

When the power conversion device 200 is started by turning on the power in step S1, the connection of the power conversion device 200 to the cloud server 100 is started in step S2.

If the connection is not completed in step S3 (steps S3 and No), the power converter 200 is operated independently in step S4, and then the process of step S9 is performed.

When the connection is completed in step S3 (steps S3 and Yes), data transmission from the power converter 200 to the cloud server 100 is performed in step S5. Specifically, for example, when the user sets the purpose of the power converter 200 to an input unit (user interface such as a touch panel) (not shown) of the simple PLC unit 13, information and information indicating the setting contents (for example, pump drive) are shown. The information of the power conversion device 200 collected by the collection unit 15, the information of a predetermined template, and the like are transmitted to the cloud server 100.

In step S6, information of the power conversion device 200 and the like are stored in the data storage unit 3 in the cloud server 100. Then, based on the accumulated information, the program generation unit 5 generates a program necessary for the operation of the simple PLC unit 13, selects an optimum template, sets a value, changes to another template, and the like. The details of the processing operation in step S6 will be described later.

In step S7, information such as a program generated by the program generation unit 5 is transmitted to the power conversion device 200 and written to the program storage unit 14 of the power conversion device 200.

If the writing to the program storage unit 14 is not completed (steps S7 and No), the processes after step S5 are repeated.

When the writing to the program storage unit 14 is completed (steps S7, Yes), in step S8, the simple PLC unit 13 selects the information written in the program storage unit 14, for example, the optimum template for controlling the motor 7. To the user. Proposals to users may be made by displaying specific proposal contents with character information, for example, on a touch panel or the like provided in the simple PLC unit 13, or by outputting specific proposal contents with voice guidance. You may.

In step S9, if the operation of the power converter 200 is not stopped (steps S9, No), the processes after step S5 are repeated.

As described above, in the motor control system 300 according to the present embodiment, the user sets only the use of the power conversion device 200 in the input unit of the simple PLC unit 13, so that the information of the power conversion device 200 and a predetermined template can be set. Information, setting contents, etc. are collected in the cloud server 100. The timing of collecting information on the cloud server 100 may be the time when the user's operation is performed, or may be every preset cycle. Then, the collected information of the power conversion device 200 and the like are accumulated in the data storage unit 3, and based on the accumulated information, the program generation unit 5 generates and optimizes the program necessary for the operation of the simple PLC unit 13. Templates are selected, set values, and changes to other templates are made. Since the processing result in the program generation unit 5 is written in the program storage unit 14 of the power conversion device 200, it is possible to propose to the user a template or the like that is most suitable for controlling the motor 7.

Next, specific examples of applications of the motor control system 300, operation patterns thereof, and the like will be described with reference to FIG. FIG. 5 is a diagram showing applications and operation patterns to which the motor control system is applied.

Applications to which the motor control system 300 is applied include, for example, driving of fans and pumps, driving of robots and machine tools, driving of printing machines and winders, driving of conveyors (belt conveyors, etc.) and elevators. Examples include driving air conditioners and compressors, and driving induction hardening devices.

As for the operation pattern when driving a fan or pump, for example, in the case of a fan or pump that circulates a refrigerant, the temperature of the object to be cooled tends to rise in summer, so it is necessary to increase the rotation speed of the motor that drives the fan or pump. On the other hand, in winter, the temperature rise of the object to be cooled is low, so it is desirable to reduce the rotation speed of the motor to reduce power consumption. Such an operation pattern includes, for example, a one-year cycle and a one-day cycle (for example, increasing the rotation speed of the motor in the morning and decreasing the rotation speed of the motor at night). Therefore, since the operation pattern does not change every few seconds, it can be said that the frequency of change of the operation pattern is low.

For example, the operation pattern when driving a robot or machine tool is complicated because the rotation speed changes every few seconds for complicated movements, but for simple movements, the rotation speed is It's simple because changes don't happen often. Therefore, since the operation pattern in this case depends on the installation environment of the robot, the machine tool, etc., the application of the robot, the machine tool, etc., the change frequency of the operation pattern may be low or high.

As for the operation pattern when the printing machine or the winder is driven, it can be said that the frequency of change of the operation pattern is low because the printing machine or the winder is usually operated at a constant speed. However, the rotation speed needs to be controlled with high accuracy.

The operation pattern when driving a conveyor or elevator varies depending on, for example, the number of products placed on the conveyor belt, the individual weight of the products, the number of passengers in the elevator, etc., so the rotational torque and rotational speed vary. Both change in a short period of time. Therefore, it can be said that the frequency of change in the operation pattern is high.

The operation pattern when driving an air conditioner or a compressor is, for example, a fan motor installed in an indoor unit of an air conditioner or a compressor motor installed in an outdoor unit of an air conditioner, such as a temperature change in a room subject to air conditioning. It is controlled to the optimum temperature by changing the humidity. The operation pattern changes depending on the installation environment of the air conditioner and compressor. However, the operating state does not change frequently every few seconds, but changes every few minutes or tens of minutes. Therefore, it can be said that the frequency of change in the operation pattern is low.

The operation pattern when driving an induction hardening device is, for example, by controlling a high-frequency power supply, a large current is passed through a coil provided around the heating target in a short time, so that a large current can be passed instantaneously. As expected, it can be said that the frequency of change in the operation pattern is low because current control is not required frequently.

As described above, it can be seen that the operation pattern differs depending on the application, and the change frequency of the operation pattern also differs.

Here, in the flow rate control of the pump, conventionally, the control valve or the like is used instead of the inverter, and the energy efficiency is poor. Power consumption can be reduced by replacing this with an inverter and changing the setting of the speed with respect to the pump by the inverter according to the load condition. At this time, by wiring the sensor output of the flow meter or the pressure gauge to the analog input of the power conversion device equipped with the simple PLC function, it is possible to control the speed adjustment according to the pressure and the flow rate. However, in general, abundant experience and knowledge of the user are required to determine the optimum value. Therefore, even if a power conversion device equipped with a simple PLC function is introduced, it is often used with the initial value as it is. Moreover, even if the conditions are changed based on the user's experience, it may not always be possible to reduce the conditions to the optimum conditions.

Therefore, in the motor control system 300 according to the present embodiment, the information collecting unit 15 collects information such as the flow rate and pressure of the pump, the information collected by the power converter 200, and the characteristics of the software of the simple PLC function. The collected information is transmitted to the cloud server 100, and the data analysis unit 4 analyzes the data using the information to derive the optimum conditions.

FIG. 6 is a diagram showing an example of an operation pattern. FIG. 6 shows, as an example, an operation pattern in the flow rate control of the pump among the operation patterns shown in FIG. The vertical axis on the left represents speed, the vertical axis on the right represents temperature, and the horizontal axis represents time. The solid line is, for example, a plot of the speed (rotational speed of the motor for driving the pump) measured and collected multiple times in one year. The broken line is a plot of the air temperature (ambient temperature of the pump body, ambient temperature of the pipe through which the refrigerant flows, etc.) collected by measuring multiple times in one year, for example. In the example of FIG. 6, an example in which the speed of the pump for pumping the refrigerant is manually adjusted is shown. Specifically, for example, during the period from October to June, the temperature is relatively low, so the pump speed is low, and during the period from June to October, the temperature is relatively high, so the pump speed is high. There is. However, since the operation is performed manually without using the simple PLC unit 13, the speed cannot be flexibly switched according to the change in temperature as shown in FIG. In other words, there are cases where the flow rate becomes too high when the temperature is low. Better optimum operation can be realized by controlling the speed with a program that switches the speed according to the date and time and the temperature by using the simple PLC13.

The data analysis unit 4 analyzes the information transmitted from the power converter 200 in order to propose the optimum operation pattern, and for example, sets a correlation parameter (estimated gear ratio) indicating the correlation between the temperature and the operation speed. Calculated, calculate the optimum speed command value for the temperature from the calculated correlation parameter, and correspond to the speed command value corresponding to the calculated specific temperature and the temperature calculated based on the information from the power converter 200. Calculate the difference from the speed command value. Then, the speed adjustment amount that offsets the error is determined as the offset value. By incorporating this offset value, that is, the speed deviation amount, into the program code of the simple PLC as the speed correction amount, the program generation unit 5 generates a sequence program for controlling the pump at the optimum speed with respect to the air temperature.

The temperature data used as a reference for generating the sequence program is linked to, for example, the temperature measured by a temperature sensor provided outside the power converter 200, for example, in the vicinity of an electric motor or a pump, and weather information collected on the Internet. Such as temperature. These pieces of information may be input to the simple PLC unit 13 as signals and transmitted from the simple PLC unit 13 to the cloud server 100 via the external communication unit 10.

The data analysis method is not limited to the above method, and the following methods may be used. For example, templates suitable for various applications that are expected to be used by the user are designed in advance, and these templates are stored in a memory such as a data storage unit 3. Then, the data analysis unit 4 may read a plurality of templates close to the user's purpose from the memory based on the information from the power conversion device 200, and the program generation unit 5 may generate a sequence program based on the templates. Sequence programs corresponding to a plurality of templates are stored in the program storage unit 14, and by the user selecting from these, more energy-saving operation can be performed, and production efficiency is improved or the operating rate is improved. be able to. Alternatively, the template selected by the user may be input to the cloud server 100, and a sequence program may be generated from the template corrected by the above offset value or the like.

FIG. 7 is a diagram for explaining an operation of automatically adjusting the speed pattern. FIG. 7 shows the relationship between the current flowing through the motor 7 and the output frequency of the motor control unit 12 (rotational speed of the motor 7) in the flow rate control of the pump. The vertical axis is current and the horizontal axis is frequency. For example, in pump flow control, when the current flowing through the motor 7 is proportional to the flow rate or pressure and the current changes linearly with respect to the change in flow rate or pressure, the current flowing through the motor 7 and the motor control unit 12 It is assumed that the output frequency of is in a proportional relationship as shown by the solid line in FIG.

Then, in the flow rate control of the pump, when the current value according to the speed is defined, it means that the load fluctuates when the current rises even though the speed does not change during the operation of the pump. To do. In that case, for example, the output frequency (rotational speed) decreases in the direction of the arrow shown on the horizontal axis, so that the locus of the current shown by the broken line is changed to the current shown by the solid line (the current value is lowered). Can be carried out by the power converter 200. The power conversion device 200 may input a measured value of a flow meter, a pressure gauge, or the like and use the measured value instead of the above current value.

FIG. 8 is a diagram showing a functional block of the simple PLC unit. FIG. 9 is a diagram showing an example of a look-up table. FIG. 8 shows an example of the function included in the simple PLC unit 13. Since the simple PLC unit 13 generates a speed command for adjusting the speed of the pump, for example, the simple PLC unit 13 has a plurality of input units 50 for inputting speed information, temperature information, and date information, and a LUT unit 51. And a comparison unit 52.

The input unit 50 normalizes or replaces the temperature, date, and the like with numerical values that can be identified by the LUT 51, and inputs the temperature, the date, and the like to the LUT 51. As shown in FIG. 9, the LUT 51 holds speed correction information corresponding to each of the air temperature and the temperature. The LUT 51 selects the speed correction information corresponding to the input from the input unit 50 and inputs it to the comparison unit 52. The comparison unit 52 updates by subtracting the speed selected by LUT 51 from the speed normalized or replaced by LUT 51, or by adding the speed selected by LUT 51 to the speed normalized or replaced by LUT 51. A speed command corresponding to the speed is generated and input to the motor control unit 12.

If the input conditions are complicated, it may be realized by a program in which a comparator or the like is combined instead of the LUT 51.

FIG. 10A is a diagram showing a configuration example of the first motor control system according to the comparative example. FIG. 10B is a diagram showing a configuration example of the second motor control system according to the comparative example. In the motor control system 300A shown in FIG. 10A, a PLC 13A (PLC having a motion control function) is provided outside the power conversion device 200A, and the PLC 13A is connected to the cloud server 100A via a wired network such as a LAN 40 in a factory. Be connected. In the motor control system 300B shown in FIG. 10B, a power conversion device 200B having a built-in PLC having a motion control function is connected to the outside of the power conversion device 200A via a wired network such as LAN40.

In the motor control system 300A, the PLC 13A performs fine operation control using a wired network, and mainly performs simple operation ON / OFF, speed switching by a simple I / O signal, and the like. In addition, communication data uses profiles such as CC-Link (registered trademark), Modbus (registered trademark), Profibus, EtherCAT (registered trademark), CAN (registered trademark), and further sets and unique functions of the power conversion device 200A. Uses consortiums such as ProfiDrive and CiA402 and standards unique to each manufacturer. In some cases, the power converter 200A is equipped with an RTC (Real Time Clock) that records and holds the date and time, in other cases it is not set and is not set, or in some cases it does not have an RTC function. Therefore, a function of complementing the date and time information based on the time and recording interval received by the cloud server 100A is also required for the data storage unit (not shown) in the cloud server 100A. This is because time information is needed for analysis associated with seasons, weather, and so on. For example, an external communication function may be used to access an NTP server or the like on the Internet, and the current time with high accuracy may be adjusted within a few hours or a few days in consideration of the network delay time. When the GPS is installed, the time information of GPS (Global Positioning System) may be used, and when the mobile phone line is used, the time information distributed from the base station may be used. If there are settings and access from the smartphone on a regular basis, these date information may be acquired. A microcomputer is mounted on the control device in the power conversion device 200A, and the microcomputer controls the motor, operates the user, inputs / outputs signals, and the like.

Further, in recent years, the processing performance of the power conversion device has been improved, and the capacity of the memory and the like has been enhanced, so that there is a margin for adding functions. Therefore, as in the power conversion device 200B shown in FIG. 10B, the appeal point is to reduce the wiring and parts in the control panel by providing the power conversion device 200B with the PLC function required externally. It has come to be. However, in the example of FIG. 10B, although the PLC function is incorporated in the power converter 200B, the user needs to know the PLC for the setting, and the user who has used only the normal power converter 200A needs to know the PLC. , It is difficult to use, and there are not many cases where it is used. Therefore, the manufacturer of the power conversion device 200B is devising ways to make it easier to use by presenting production examples according to the intended use such as samples and templates. For example, typical usages for winding, winding, pumps, fans, etc. are published on the Internet homepage. On the other hand, it is difficult for the user of the power converter 200A to use this sample or template without further knowledge.

On the other hand, in the motor control system 300 provided with the power conversion device 200 according to the present embodiment, the power conversion device 200 is automatically set by the user by setting only the applications such as winding, winding, pump, and fan. Information, information on a predetermined template, and the like are collected in the cloud server 100. Then, the collected information of the power conversion device 200 and the like are accumulated in the data storage unit 3, and based on the accumulated information, the program generation unit 5 generates and optimizes the program necessary for the operation of the simple PLC unit 13. The template is selected, the set value, the change to another template, and the like are performed, and the information is written in the program storage unit 14 of the power conversion device 200. That is, the cloud server 100 can select the optimum template for controlling the motor 7 and propose it to the user.

Also, in the past, when changing a power conversion device that is not compatible between different manufacturers, or when changing the model of a power conversion device, it is necessary to recreate it because the settings etc. cannot be diverted, or user learning It often took time and effort, such as time and effort. According to the present embodiment, such labor can be significantly reduced, and the operating cost can be significantly reduced.

The configuration shown in the above-described embodiment shows an example of the content of the present invention, can be combined with another known technique, and is one of the configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

1: External communication unit 2: Data collection unit 3: Data storage unit 4: Data analysis unit 5: Program generation unit 7: Motor 10: External communication unit 11: Command generation unit 12: Motor control unit 12a: Motor control circuit 12b: Drive signal generation circuit 12c: Inverter circuit 13: Simple PLC unit 14: Program storage unit 15: Information collection unit 50: Input unit 51: LUT unit 52: Comparison unit 60: Communication line 100: Cloud server 200: Power conversion device 300: Motor control system

Claims (3)

A power converter that supplies power to a motor
A motor control unit that controls the motor and
The PLC unit that controls the motor control unit according to the sequence program, and the PLC unit.
A communication unit that transmits information to and from an external computer of the power converter,
With
Based on the information collected by the power converter including the operating state of the motor, a sequence program generated by the external computer is input via the communication unit, and the motor control unit according to the input sequence program. A power converter that generates operation commands. The power conversion device according to claim 1 and
The external computer that generates the sequence program based on the information collected by the power converter including the operating state of the motor, and the external computer.
Equipped with a motor control system. On the computer
Steps to collect information collected by the power converter, including the operating status of the motor,
A step of writing a sequence program generated based on the collected information to the internal memory of the power conversion device via a communication unit included in the power conversion device.
A step of controlling the motor control unit included in the power conversion device according to the written sequence program, and
Motor control program to execute.

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