Apparatus and method for controlling power conversion for medical devices

Abstract

The present disclosure relates to a system for controlling a power conversion device connected to a medical device. According to the present disclosure, the power conversion device comprises a rectifier unit that rectifies a supply power, a converter unit that converts the rectified power output from the rectifier unit into a DC power according to the operation of a switching element, an inverter unit that converts the DC power into an AC power, a data acquisition unit that collects data related to the operating state of the power conversion device, and a control unit that controls the converter unit and the inverter unit. The control unit may generate a limiting signal that limits the operation of the converter unit and the inverter unit using environmental information regarding the operating environment of the power conversion device, operation information regarding the operation history of the power conversion device, device information regarding a medical device connected to the power conversion device, and record information regarding the performance of the power conversion device.

Description

Technology Field

[0001] The present disclosure generally relates to a system for controlling a power conversion device connected to a medical device in the medical field, and more specifically, to an apparatus and method for converting power supplied to a medical device evenly and stably by controlling the operation of a rectifier, a converter, and an inverter using a control unit in a power conversion control system. Background Technology

[0003] Medical devices are equipment directly related to patients' lives, so a stable and uniform power supply is essential. In particular, in structures where multiple medical devices or internal modules of medical devices receive power from a single power supply, the quality of power delivered to each medical device and the balance of distribution have a significant impact on the normal operation and reliability of the devices. Accordingly, power equalization converters are attracting attention as a core technology for stabilizing the power supply and efficiently distributing the power required by each device or module.

[0004] Conventional power distribution systems are typically constructed using constant voltage circuits or simple DC-DC converters. However, these systems fail to adequately compensate for voltage drops or current imbalances caused by changes in load, which can lead to problems where overcurrent or overvoltage is applied to some circuits. This can result in malfunctions of sensitive medical devices, shortened lifespans, or pose a direct threat to patient safety.

[0005] Furthermore, in structures where multiple power converters are configured in parallel, output voltages may vary slightly depending on the operating timing and phase differences of each converter, leading to current imbalance. This current imbalance poses a problem, as it can cause overloading in specific converters during long-term use, thereby degrading system reliability. Additionally, existing power conversion systems suffer from inadequate fault detection and response capabilities. While medical devices must always maintain a stable state, some power converters are designed so that a single failure can affect the entire system; moreover, the lack of automatic shutdown and load balancing functions in the event of a failure makes rapid response difficult.

[0006] Therefore, there is a need for high-reliability power equalization conversion technology designed specifically for medical devices, and there is a growing need for a device that integrates a circuit structure capable of automatically equalizing current and voltage for each load as well as stable power supply, and a fault response function.

[0007] The aforementioned technology is technical information that the inventor possessed for the derivation of the present invention or acquired during the process of deriving the present invention, and does not necessarily refer to known technology disclosed to the general public prior to the filing of the present invention. Prior art literature

[0009] Registered Patent Publication No. 10-1261801 (May 7, 2013) (Patent Law 2) Published Patent Publication No. 10-2019-0079525 (July 5, 2019) The problem to be solved

[0010] Based on the discussion above, the present disclosure provides an apparatus and method for controlling a power conversion device connected to a medical device.

[0011] In addition, the present disclosure provides an apparatus and method for converting power supplied to a medical device evenly and stably by controlling the operation of a rectifier, a converter, and an inverter using a control unit in a power conversion control system.

[0012] In addition, the present disclosure provides an apparatus and method for stably operating a power conversion device by controlling power conversion in consideration of the characteristics of the power conversion device and the characteristics of the medical device connected to the power conversion device in a power conversion control system.

[0013] In addition, the present disclosure provides an apparatus and method for setting criteria for changing the operating mode of a power converter to a safety mode in a power conversion control system.

[0014] In addition, the present disclosure provides an apparatus and method for establishing operating standards in a power conversion control system by considering device operating standards based on the characteristics of the type of medical device, general operating standards based on the characteristics of the power conversion device, and special operating standards based on the manager's records.

[0015] In addition, the present disclosure provides an apparatus and method for stably supplying power to a medical device by generating power for a load by equally converting a supply power received from an external source in a power conversion control system. means of solving the problem

[0017] According to various embodiments of the present disclosure, a power conversion device comprises a rectifier unit that rectifies a supply power, a converter unit that converts the rectified power output from the rectifier unit into a DC power according to the operation of a switching element, an inverter unit that converts the DC power into an AC power, a data acquisition unit that collects data related to the operating state of the power conversion device, and a control unit that controls the converter unit and the inverter unit. The control unit may generate a limiting signal that limits the operation of the converter unit and the inverter unit using environmental information regarding the operating environment of the power conversion device, operation information regarding the operation history of the power conversion device, device information regarding a medical device connected to the power conversion device, and record information regarding the performance of the power conversion device.

[0018] According to another embodiment, the control unit may, after generating the restriction signal, transmit to the administrator terminal whether the restriction signal has been generated, and based on the response from the administrator terminal, use the restriction signal to restrict the operation of the converter unit and the inverter unit.

[0019] According to various embodiments of the present disclosure, a method of operating a power conversion device comprising a rectifier unit for rectifying a supply power, a converter unit for converting a rectified power output from the rectifier unit into a DC power according to the operation of a switching element, an inverter unit for converting the DC power into an AC power, a data acquisition unit for collecting data related to the operating state of the power conversion device, and a control unit for controlling the converter unit and the inverter unit may include the step of generating a limiting signal that limits the operation of the converter unit and the inverter unit using operation information regarding the operation history of the power conversion device, device information regarding a medical device connected to the power conversion device, record information regarding the performance of the power conversion device, and environment information regarding the operating environment of the power conversion device.

[0020] According to another embodiment, the step of generating the limit signal may include: acquiring the operation information, the device information, and the record information based on the input of a manager; receiving the environment information by requesting an external server in response to the acquisition of the operation information; setting an operation standard for changing the operation mode of the power converter to a safe mode from the operation information, the device information, the record information, and the environment information; and generating a limit signal that limits the operation of the power converter by comparing the operation state measured by the data acquisition unit with the operation standard.

[0021] According to another embodiment, the step of setting the operation standard may include: a step of confirming the device operation standard by verifying the type of medical device and the characteristic parameter according to the type within the device information; a step of determining the general operation standard by extracting the characteristic parameter according to the operation information and the environment information from a pre-stored table; a step of calculating the special operation standard according to the detection frequency of performance words from the record information; and a step of setting the operation standard by combining the device operation standard, the general operation standard, and the special operation standard.

[0022] According to another embodiment, the feature parameter may indicate information having a reference temperature, a reference operation duration, and a reference error as parameters.

[0023] According to another embodiment, the step of calculating the special operation criteria may include: detecting performance words related to the performance evaluation of the power conversion device of the manager in the record information; classifying each of the performance words into one of a temperature classification, a time classification, and an error classification by considering the meaning of the performance words; generating an individual performance vector indicating the importance of the performance words based on the number of times the performance words are detected; and calculating the special operation criteria based on the magnitude of each of the temperature classification, the time classification, and the error classification in the individual performance vector.

[0024] According to another embodiment, the operation information may include the usage period, operation frequency, and standby time of the power conversion device, the device information may include the type of medical device and characteristics by type, and the environment information may include the medical department of the medical institution where the power conversion device is used, the frequency of movement, and the accident history of nearby hospitals.

[0025] Various aspects and features of the invention are defined in the appended claims. Combinations of features of the dependent claims may be appropriately combined with features of the independent claims, not only as explicitly presented in the claims.

[0026] Additionally, one or more selected features of any one embodiment described in this disclosure may be combined with one or more selected features of any other embodiment described in this disclosure, and such alternative combination of features is possible if it at least partially alleviates one or more technical problems discussed in this disclosure or at least partially alleviates technical problems discernible from this disclosure by a person skilled in the art, and furthermore, such combination is possible if the specific combination or permutation of the embodiment features thus formed is not understood by a person skilled in the art to be incompatible.

[0027] In any described example implementation, two or more physically distinct components may alternatively be integrated into a single component if such integration is possible, provided that the same function is performed by the single component thus formed. Conversely, a single component of any embodiment described in this disclosure may alternatively be implemented by two or more distinct components that achieve the same function, where appropriate.

[0028] The objective of certain embodiments of the present invention is to solve, mitigate, or eliminate at least one of the problems and / or disadvantages associated with the prior art, at least partially. Certain embodiments are intended to provide at least one of the advantages described below. Effects of the invention

[0030] The apparatus and method according to various embodiments of the present disclosure enable precise control of a power conversion device connected to a medical device.

[0031] In addition, the apparatus and method according to various embodiments of the present disclosure enable the power supplied to a medical device to be converted evenly and stably by controlling the operation of a rectifier, a converter, and an inverter using a control unit in a power conversion control system.

[0032] In addition, the apparatus and method according to various embodiments of the present disclosure enable stable operation of a power conversion device by controlling power conversion in a power conversion control system by considering the characteristics of the power conversion device and the characteristics of the medical device connected to the power conversion device.

[0033] In addition, the apparatus and method according to various embodiments of the present disclosure enable the setting of criteria for changing the operating mode of a power converter to a safety mode in a power conversion control system.

[0034] In addition, the apparatus and method according to various embodiments of the present disclosure enable customized setting of operating standards in a power conversion control system by considering device operating standards based on the characteristics of the type of medical device, general operating standards based on the characteristics of the power conversion device, and special operating standards based on the manager's records.

[0035] In addition, the apparatus and method according to various embodiments of the present disclosure enable stable power supply to a medical device by generating power for a load through equal conversion of the supply power received from an external source in a power conversion control system.

[0036] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs from the description below. Brief explanation of the drawing

[0038] The accompanying drawings, included as part of the detailed description to aid in understanding the embodiments, provide various embodiments and explain the technical features of the various embodiments together with the detailed description. FIG. 1 illustrates a power conversion control system according to various embodiments of the present disclosure. FIG. 2 illustrates a general configuration diagram of a power conversion device utilizing a switching element in a power conversion control system according to various embodiments of the present disclosure. FIG. 3 illustrates a schematic diagram of a configuration in which a DC load and an AC load are connected to a power conversion device in a power conversion control system according to various embodiments of the present disclosure. FIG. 4 illustrates the configuration of a control unit in a power conversion control system according to various embodiments of the present disclosure. FIG. 5 illustrates a schematic diagram regarding the process of a power converter generating a limiting signal in a power conversion control system according to various embodiments of the present disclosure. FIG. 6 illustrates an example of a schematic diagram of a power conversion device in a power conversion control system according to various embodiments of the present disclosure. FIG. 7 illustrates a flowchart regarding a method for a power conversion device to generate a limiting signal that limits a converter unit and an inverter unit in a power conversion control system according to various embodiments of the present disclosure. FIG. 8 illustrates a flowchart regarding a method for a power converter to set an operating standard in a power conversion control system according to various embodiments of the present disclosure. Specific details for implementing the invention

[0039] The terms used in this disclosure are used merely to describe specific embodiments and are not intended to limit the scope of other embodiments. A singular expression may include a plural expression unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as generally understood by those skilled in the art described in this disclosure. Terms used in this disclosure that are defined in a general dictionary may be interpreted as having the same or similar meaning as they have in the context of the relevant technology, and are not to be interpreted in an ideal or overly formal sense unless explicitly defined in this disclosure. In some cases, even terms defined in this disclosure are not to be interpreted to exclude the embodiments of this disclosure.

[0040] In the various embodiments of the present disclosure described below, a hardware-based approach is described as an example. However, since the various embodiments of the present disclosure include techniques using both hardware and software, the various embodiments of the present disclosure do not exclude a software-based approach.

[0041] The present disclosure relates to a system for controlling a power conversion device connected to a medical device in the medical field. Specifically, the present disclosure describes a technology for converting power supplied to a medical device evenly and stably by controlling the operation of a rectifier, a converter, and an inverter using a power source.

[0042] Hereinafter, various embodiments are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present disclosure. However, since the technical concept of the present disclosure can be modified and implemented in various forms, it is not limited to the embodiments described in this specification. In describing the embodiments disclosed in this specification, if it is determined that specifically describing related prior art could obscure the essence of the technical concept of the present disclosure, such specific description of prior art is omitted. Identical or similar components are assigned the same reference number, and redundant descriptions thereof are omitted.

[0043] When an element is described in this specification as being "connected" to another element, this includes not only cases where they are "directly connected" but also cases where they are "indirectly connected" with another element in between. When an element is described as "comprising" another element, this means that, unless specifically stated otherwise, it does not exclude other elements in addition to the other elements but may include additional elements.

[0044] Some embodiments may be described by functional block configurations and various processing steps. Some or all of these functional blocks may be implemented by various numbers of hardware and / or software configurations that perform specific functions. For example, the functional blocks of the present disclosure may be implemented by one or more microprocessors or by circuit configurations for a specific function. The functional blocks of the present disclosure may be implemented in various programming or scripting languages. The functional blocks of the present disclosure may be implemented as algorithms executed on one or more processors. The functions performed by the functional blocks of the present disclosure may be performed by a plurality of functional blocks, or the functions performed by a plurality of functional blocks in the present disclosure may be performed by a single functional block. Additionally, the present disclosure may employ prior art for electronic configuration, signal processing, and / or data processing, etc.

[0045] Additionally, in this disclosure, expressions such as "greater than" or "less than" have been used to determine whether specific conditions are satisfied or fulfilled; however, this is merely for illustrative purposes and does not exclude descriptions of "greater than" or "less than." Conditions described as "greater than" may be replaced with "greater than," conditions described as "less than" with "less than," and conditions described as "greater than and less than" with "greater than and less than."

[0047] FIG. 1 illustrates a power conversion control system (100) according to various embodiments of the present disclosure.

[0048] The power conversion control system (100) directs a power control system that converts a supply power received from an external source evenly and stably. Specifically, the power conversion control system (100) may direct a system that converts the supply power consistently in order to supply stable and even power to medical devices in an environment where medical devices are operated, such as a medical institution. According to the power conversion control system (100), multiple medical devices may be placed within the medical institution, and each medical device may have an input voltage set for normal operation. Here, the power conversion device in the power conversion control system (100) may convert the supply power in the form of AC into DC to supply DC voltage to medical devices that require DC voltage supply, and may convert the converted DC voltage into AC to supply AC voltage to medical devices that require AC voltage supply. According to one embodiment of the present disclosure, the power conversion control system (100) may include an administrator terminal (110), an external server (130), a power conversion device (150), and a network (170).

[0049] The administrator terminal (110) directs an electronic device operated by an administrator who manages the overall supply of power. The administrator directs a natural person who manages the overall power conversion control in the power conversion control system (100), and can control the operation of the power conversion device by generating information to control the operation of the power conversion device using the administrator terminal (110). According to one embodiment of the present disclosure, the administrator terminal (110) can generate information regarding the characteristics of a medical device or the operating status of the power conversion device, or generate command signals to operate or stop it based on the administrator's input, and can transmit the generated information or signals to the outside. According to one embodiment of the present disclosure, the administrator terminal (110) may include a fixed terminal implemented as a computer device or a mobile terminal. Specifically, the administrator terminal (110) may direct a smartphone, a mobile phone, a navigation device, a computer, a laptop, a digital broadcasting terminal, a PDA (personal digital assistant), a PMP (portable multimedia player), or a tablet PC. The administrator terminal (110) can communicate with at least one of an external server (130) and a power conversion device (150) through a network (170) using a wireless or wired communication method.

[0050] The external server (130) directs a server device that stores data necessary for setting operating standards for the power conversion device (150) and restricting the operation of the power conversion device (150) accordingly. The external server (130) may store environmental information regarding the environmental characteristics of the medical institution where the power conversion device (150) is operated, and may transmit the stored environmental information to the power conversion device (150) upon the request of the power conversion device (150). According to one embodiment of the present disclosure, the external server (130) may be implemented as a computer device or a plurality of computer devices that communicate with the administrator terminal (110) via a network to provide commands, codes, files, content, services, etc.

[0051] The power conversion device (150) refers to an electronic device that directly performs power conversion regarding the power supply. The power conversion device (150) may include a rectifier, a converter, and an inverter, and when power is supplied, it can convert AC power into a desired output form and size by utilizing a circuit including the rectifier, the converter, and the inverter. Here, the power conversion device (150) can set operating standards for safe operation by considering the characteristics of the connected medical device or medical institution, and can perform safe power supply to the medical device by restricting the operation of the components within the power conversion device (150) according to the operating standards.

[0052] As illustrated in FIG. 1, the components of a power conversion control system (100) can be connected via a network (170). According to one embodiment of the present disclosure, the network (170) refers to a connection structure capable of exchanging information between each node, such as a plurality of terminals and servers. Examples of such networks include, but are not limited to, RF, 3GPP (3rd generation partnership project) networks, LTE (long term evolution) networks, 5GPP (5th generation partnership project) networks, WIMAX (world interoperability for microwave access) networks, the internet, LAN (local area network), Wireless LAN (wireless local area network), WAN (wide area network), PAN (personal area network), Bluetooth networks, NFC networks, satellite broadcasting networks, analog broadcasting networks, DMB (digital multimedia broadcasting) networks, etc.

[0053] According to the power conversion control system (100), when use of a medical device is required at a medical institution, the administrator can supply power to the medical device by utilizing the power conversion device (150). Here, since failure to maintain a stable power supply due to the characteristics of the medical device can lead to a medical accident, the power conversion device (150) can periodically notify the administrator of matters regarding performance, such as internal temperature, operating time, and error, and the administrator can support the maintenance of a stable power supply without accidents by checking the status of the power conversion device (150) through the administrator terminal (110). That is, the power conversion device (150) according to the present disclosure may include a configuration to support stable operation along with a general power conversion configuration. The specific configuration and operation of the power conversion device (150) are described in detail below.

[0055] FIG. 2 illustrates a general configuration diagram (200) of a power conversion device (150) utilizing a switching element in a power conversion control system (100) according to various embodiments of the present disclosure.

[0056] Referring to FIG. 2, a configuration diagram of a driving control circuit based on a power switching element is illustrated. FIG. 2 relates to a conventional general switching element-based control circuit, wherein the switching unit (220) can be turned on or off according to the control of the control unit (210) to transmit voltage to the transformer unit (230), and the power can be converted by rectifying and smoothing the power transformed through the transformer unit (230).

[0057] Specifically, as illustrated in FIG. 2, the power switching element driving control circuit may include a control unit (210) that outputs a control driving signal indicating the turn-on or turn-off of the switching element, a switching unit (220) that receives the turn-on / turn-off signal of the switching element from the control unit (210) and transmits a voltage of positive or negative polarity to the primary coil side of the transformer unit (230), a transformer unit (230) that includes a secondary coil that receives the voltage transmitted from the switching unit (220) and transforms it into a desired voltage by means of an induced electromotive force, and a power supply unit (240) that rectifies the required voltage signal transformed from both ends of the secondary coil of the transformer unit (230) by a bridge rectifier circuit, charges it into a rectifier capacitor, and then supplies the required voltage to the device.

[0059] FIG. 3 illustrates a schematic diagram (300) regarding a configuration in which a DC load and an AC load are connected to a power conversion device (150) in a power conversion control system (100) according to various embodiments of the present disclosure.

[0060] Terms such as '...part', '...unit' used below refer to a unit that processes at least one function or operation, and this may be implemented in hardware or software, or a combination of hardware and software.

[0061] Referring to FIG. 3, at least one of a DC load (360) and / or an AC load (370) may be connected to a power conversion device (150). The power conversion device (150) may perform equal voltage division of power elements when power elements of a high-voltage resonant HF DC / DC converter are connected in series, and may include a rectifier (310), a converter (320), a data acquisition unit (340), and a control unit (350). This configuration is for the power conversion device (150) to supply DC power to the DC load (360), and an inverter unit (330) may be additionally configured to supply AC power to the AC load (370).

[0062] The DC load (360) is driven by receiving a DC voltage output from the power converter (150) and can indicate most load devices used in medical devices, such as patient monitors, insulin pumps, portable electrocardiogram (ECG) devices, and some infusion pumps. On the other hand, the AC load (370) is driven by receiving an AC voltage output from the power converter (150) and can indicate high-output devices such as large medical devices, such as ultrasound diagnostic devices, X-ray devices, MRI, CT, and incubators.

[0063] The rectifier (310) performs the function of rectifying the supply power through a circuit composed of at least one diode when the supply power in the form of AC is input. According to one embodiment of the present disclosure, the rectifier (310) may include a diode bridge rectifier in which four diodes are connected in a bridge form.

[0064] The converter unit (320) performs the function of converting the rectified power output from the rectifier unit (310) into DC power according to the operation of the switching element. That is, the converter unit may include a switching unit composed of at least one switching element, and can be controlled so that DC conversion through the converter unit (320) is achieved through on / off switching control. According to one embodiment of the present disclosure, the converter unit (320) can transform the voltage into low-voltage DC power and supply it to the DC load (360) by controlling the switching unit driven by a control signal of the control unit (350).

[0065] The inverter unit (330) performs the function of converting DC power into AC power. The inverter unit (330) can perform the function of converting DC power output from the converter unit (320) into AC power and can supply the output DC voltage to the AC load (260). According to one embodiment of the present disclosure, the AC load (370) may include a fan that is not composed of a DC load (360).

[0066] The data acquisition unit (340) performs the function of collecting data related to the operating status of the power conversion device. The data acquisition unit (340) can perform the function of collecting feedback information so that the control unit (350) can check the output voltage of the power conversion device (150) and perform feedback control, or collecting information regarding the state within the power conversion device.

[0067] The control unit (350) performs the function of controlling the converter unit (320) and the inverter unit (330). Specifically, the control unit (350) can control the power converter (150) to stably supply power to a DC load (360) or an AC load (370) by checking the output voltage of the power converter (150) and performing feedback control. Additionally, the control unit (350) can collect data necessary for the overall operation of the power converter (150) and utilize the collected data to perform operation control for the safety of the medical device. The configuration of the control unit (350) is exemplified in FIG. 4, and the method by which the control unit (350) performs operation control for safety is explained in FIG. 5.

[0069] FIG. 4 illustrates the configuration (400) of a control unit (350) in a power conversion control system (100) according to various embodiments of the present disclosure. The control unit (350) may include a memory (410), a processor (420), a communication unit (430), an input / output interface (440), and a display unit (450).

[0070] The memory (410) temporarily or permanently stores data such as basic programs, application programs, and setting information for the operation of the control unit (350). The memory (410) may include a non-perishable permanent mass storage device such as RAM (random access memory), ROM (read only memory), and a disk drive, but the present invention is not limited thereto. These software components may be loaded from a computer-readable recording medium separate from the memory (410) using a drive mechanism. This separate computer-readable recording medium may include computer-readable recording media such as a floppy drive, disk, tape, DVD / CD-ROM drive, or memory card. According to an embodiment, the software components may be loaded into the memory (410) through a communication unit (430) rather than a computer-readable recording medium. Additionally, the memory (410) may provide stored data upon the request of the processor (420). The memory (410) may store information collected from the outside or information generated by the processor (420). According to one embodiment of the present disclosure, the memory (410) may store environmental information regarding the operating environment of the power conversion device, operation information regarding the operation history of the power conversion device, device information regarding a medical device connected to the power conversion device, and record information regarding the performance of the power conversion device.

[0071] The processor (420) controls the overall operations of the power conversion device (150). For example, the processor (420) can control the transmission and reception of signals through the communication unit (430). Additionally, the processor (420) can be configured to process instructions of a computer program by performing basic arithmetic, logic, and input / output operations. Instructions may be provided to the processor (420) by the memory (410) or the communication unit (430). For example, the processor (420) can be configured to execute instructions received according to program code stored in a recording device such as the memory (410). For example, the processor (420) can control the power conversion device (150) to perform operations according to various embodiments described below.

[0072] According to one embodiment of the present disclosure, the processor (420) acquires operation information, device information, and record information based on the input of a manager, requests an external server to receive environment information in response to the acquisition of operation information, sets an operation standard for changing the operation mode of the power converter to a safe mode from the operation information, device information, record information, and environment information, and controls the generation of a limiting signal that limits the operation of the power converter by comparing the operation state measured by the data acquisition unit with the operation standard.

[0073] Additionally, the processor (420) can implement an artificial neural network model structure. That is, the artificial neural network model can be implemented in hardware or software through the processor (420). The artificial neural network can be trained using big data related to natural language processing. This training may be performed, for example, in the control unit (350) itself where the artificial intelligence model is applied, or through a separate training server. The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above.

[0074] An artificial neural network model may include multiple artificial neural network layers. The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), deep Q-networks, or a combination of two or more of these, but is not limited to the examples described above. In addition to the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0075] Throughout this specification, a neural network may be composed of a set of interconnected computational units referred to as nodes. These nodes may also be referred to as neurons. An artificial neural network is composed of a plurality of nodes, and the nodes may be interconnected by one or more links. Within the neural network, two or more nodes connected via links may form a relative relationship between an input node and an output node. The concepts of input and output nodes are relative; any node in an output node relationship with respect to one node may be in an input node relationship with respect to another node, and vice versa. As previously described, the input node versus output node relationship may be generated around links. One or more output nodes may be connected to a single input node via links. In an input node and output node relationship connected via a single link, the value of the output node may be determined based on data input to the input node. Here, the nodes interconnecting the input node and the output node may have weights. The weights may be variable and may be varied by a user or an algorithm to enable the neural network to perform the desired function.

[0076] The artificial neural network according to the present disclosure may be implemented as an NLP model, and the NLP model may refer to a publicly available large language model (LLM) capable of inferring relationships between words within a large amount of text data. Since the NLP model can analyze and extract meaningful information from text, it is currently being operated in various forms such as machine translation, business classification, and chatbots. The NLP model according to the present disclosure may refer to a model trained to receive words as input and to classify the meanings of keywords included in the words and output them. According to one embodiment of the present disclosure, the artificial neural network may include a neural network trained to identify the meanings of words related to the performance of a power conversion device and to classify the words into one of temperature classification, time classification, and error classification based on the meanings of the words.

[0077] The communication unit (430) performs functions for transmitting and receiving signals through a wireless channel. All or part of the communication unit (430) may be referred to as a transmitting unit, a receiving unit, or a transmitting and receiving unit. The communication unit (430) may provide a function for the power conversion device (150) and at least one other node to communicate with each other through a communication network. According to one embodiment of the present disclosure, when the processor (420) of the power conversion device (150) generates a request signal according to program code stored in a recording device such as a memory (410), the request signal may be transmitted to at least one other node through a communication network under the control of the communication unit (430). Conversely, a control signal, command, content, file, etc. provided under the control of the processor of at least one other node may be received by the power conversion device (150) through the communication unit (430). According to one embodiment of the present disclosure, the communication unit (430) may collect data necessary for a limiting signal that limits the operation of the power conversion device (150) or communicate with the administrator terminal (110) to exchange command signals.

[0078] The input / output interface (440) may be a means for interfacing with an input / output device. In this case, the input device may be provided in the form of a device such as a keyboard or a mouse, for example, and the output device may be provided in the form of a device such as a display unit for displaying images. As another example, the input / output interface (440) may be a means for interfacing with a device in which the functions for input and output are integrated into one, such as a touchscreen. Specifically, the processor (420) of the power conversion device (150) may display a service screen or content configured using data provided by a server in processing instructions of a computer program loaded in memory (410) on the display through the input / output interface (440). According to one embodiment of the present disclosure, the input / output interface (440) may include a means for interfacing with a display unit (450). The input / output interface (440) may receive user input for a web browsing window displayed on the display unit (450), and may receive output data to be output through the display unit (450) in response to the aforementioned user input from the processor (420). According to one embodiment of the present disclosure, the input / output interface (440) can receive commands necessary for the process of generating a limit signal.

[0079] The display unit (450) indicates a display module comprising one or more displays. Each of the one or more displays included in the display unit (450) may individually display independent content, and the one or more displays described above may be combined to display a single content. According to one embodiment of the present disclosure, the one or more displays included in the display unit (450) may include physically separated multiple displays, may be physically combined multiple displays, or may be displays capable of dividing and using a single screen. According to one embodiment of the present disclosure, the display unit (450) may display the generation status of a restriction signal on the display.

[0080] The power conversion device (150) may include a rectifier (310) that rectifies the supply power, a converter (320) that converts the rectified power output from the rectifier into DC power according to the operation of a switching element, an inverter (330) that converts the DC power into AC power, a data acquisition unit (340) that collects data related to the operating state of the power conversion device, and a control unit (350) that controls the converter (320) and the inverter (330). The control unit (350) may generate a limiting signal to restrict operation by checking the state related to the safety of the power conversion device (150). In FIG. 5, the process of the control unit (350) within the power conversion device (150) generating a limiting signal is described.

[0082] FIG. 5 illustrates a schematic diagram (500) regarding the process in which a power conversion device (150) generates a limiting signal (541) in a power conversion control system (100) according to various embodiments of the present disclosure. FIG. 5 illustrates a case in which a control unit (350) within the power conversion device (150) operates.

[0083] Referring to FIG. 5, the power converter (150) can acquire operation information (501) regarding the operation history of the power converter (150), device information (502) regarding a medical device connected to the power converter, record information (503) regarding the performance of the power converter, and environment information (504) regarding the operating environment of the power converter, and can set an operation standard (521) to change the operation mode of the power converter (150) to a safety mode using the acquired information. Subsequently, the power converter (150) can generate a limiting signal (541) that limits the operation of the converter unit (320) and the inverter unit (330) by comparing the operation state (531) regarding the state of the power converter (150) with the operation standard (521).

[0084] Specifically, the power conversion device (150) obtains operation information (501), device information (502), and record information (503) based on the input of the manager. The power conversion device (150) may generate operation information (501), device information (502), and record information (503) based on the direct input of the manager, or receive the corresponding information from the manager terminal (110).

[0085] Operation information (501) indicates detailed information regarding the operation history of the power conversion device (150). That is, operation information (501) may indicate information regarding the operation status of the power conversion device (150). According to one embodiment of the present disclosure, operation information (501) may include the usage period, operation frequency, and standby time of the power conversion device (150).

[0086] Device information (502) indicates information regarding the characteristics of a medical device connected to a power conversion device (150). Device information (502) may indicate the characteristics of a medical device that is connected or is scheduled to be connected according to the operation history of the power conversion device (150). According to one embodiment of the present disclosure, device information (502) may include the type of medical device and characteristics for each type. Here, the characteristics for each type of medical device may include a dangerous temperature and a recommended operating time. Here, the allowable temperature indicates the maximum temperature for safe operation set for each medical device, as the temperature rises due to heat generation during the operation of the medical device.

[0087] Record information (503) indicates text recorded by an administrator regarding the performance of the power converter (150). Record information (503) may indicate text consisting of multiple sentences regarding performance, such as conversation records of the power converter (150) or matters recorded by an administrator.

[0088] The power conversion device (150) requests the external server (130) to receive environment information (504) in response to the acquisition of operation information (501).

[0089] Environmental information (504) indicates information regarding the environmental conditions in which the power conversion device (150) is in operation. Specifically, environmental information (504) may indicate information regarding the characteristics of the medical institution where the power conversion device (150) is deployed. According to one embodiment of the present disclosure, environmental information (504) may include the medical departments, frequency of movement, and accident history of nearby hospitals of the medical institution where the power conversion device is used.

[0090] The power converter (150) sets an operation standard (521) for changing the operation mode of the power converter (150) to a safe mode from operation information (501), device information (502), record information (503), and environment information (504). The power converter (150) can set an operation standard (521) for controlling the operation mode of the power converter (150) using collected information in terms of safe operation. That is, the operation standard (521) is a target to be compared with the operation state (531) of the power converter (150). If the operation state (531) satisfies the operation standard (521), it means that there is no problem even if it operates in a normal mode, and if the operation state (531) does not satisfy the operation standard (521), it means that it is suggested to operate in a safe mode. Here, the operation standard (521) may indicate information having a reference temperature, a reference operation duration, and a reference error as parameters.

[0091] In order to calculate the operation standard (521), the power converter (150) checks the device operation standard (511) by verifying the type of medical device and the characteristic parameters according to the type within the device information (502). The power converter (150) can verify the device operation standard (511) by verifying the type of medical device in the device information (502) and extracting the allowable temperature and recommended operation time according to the type of medical device. According to one embodiment of the present disclosure, the device operation standard (511) may indicate information having the allowable temperature and recommended operation time according to the device information as parameters.

[0092] After verifying the device operation standard (511), the power converter (150) determines the general operation standard (512) by extracting characteristic parameters according to operation information (501) and environment information (504) from a pre-stored table. The power converter (150) may pre-store a table regarding general operation standards according to the operating environment of the power converter. Here, the table may indicate temperature standards, operation duration standards, and allowable error standards corresponding to each of the usage period, operation frequency, waiting time, medical department, movement frequency, and accident history of nearby hospitals, and the power converter (150) may generate the general operation standard (512) by extracting the standard temperature, standard operation duration, and standard error according to the operation information (501) and environment information (504) from the table and calculating the average. According to one embodiment of the present disclosure, the general operation standard (512) may indicate information having the standard temperature, standard operation duration, and standard error as parameters.

[0093] The power converter (150) calculates special operation criteria (513) based on the detection frequency of performance words from record information (503). Even if the power converter (150) is of the same model, there may be differences in performance depending on usage history or operation method. Therefore, the power converter (150) can calculate special operation criteria (513) by considering the characteristics of the power converter (150), thereby calculating operation criteria (521) tailored to the power converter (150). To this end, the power converter (150) can review the manager's performance evaluation from record information (503) regarding the manager's opinion regarding the power converter (150).

[0094] To this end, the power converter (150) detects performance words related to the manager's performance evaluation of the power converter (150) from the record information (503). The power converter (150) can detect words related to the performance of the power converter (150) from the record information (503). Here, the words related to performance may be stored in advance in the memory (410).

[0095] The power conversion device (150) considers the meaning of the performance words and classifies each performance word into one of the temperature classification, time classification, and error classification. The control unit (350) within the power conversion device (150) can implement an artificial neural network model, and in particular, the artificial neural network model can direct a natural language processing model. Accordingly, the power conversion device (150) uses a natural language processing model to verify the meaning and, depending on the meaning of the detected word, can classify the word into one of the groups of words related to temperature, words related to operating time, and performance error.

[0096] The power conversion device (150) generates individual performance vectors that indicate the importance of performance words based on the number of times performance words are detected. Here, the importance indicating the vector value within the individual performance vector can be determined based on <Equation 1>.

[0097]

[0098] Referring to <Mathematical Formula 1>, Cap x is the importance of performance word x, c1 is a constant greater than 0 and less than 0.5 corresponding to the full text of the record information, text a is the total number of words constituting the entire text, d_text x is the number of times the performance word x is detected in the entire text, c2 is a constant greater than 0 and less than 0.5 corresponding to a sentence unit within the record information, sent a is the number of sentences constituting the entire text, d_sentx is the number of sentences where the performance word x is detected, P i Q is the number of words in the i-th sentence among the sentences where the performance word x is detected. i indicates the number of performance words x in the i-th sentence.

[0099] In the recorded information, words may be referred to in the sense of an evaluation regarding performance, but they may also be used in a general sense other than a performance evaluation. For example, in the case of 'high,' it may mean 'the temperature of the power converter (150) is high,' but it may also be used in other senses, such as 'placed in a high position.' Therefore, the power converter (150) has higher importance as the detection frequency in the recorded information increases, while considering the ratio of performance words detected in the entire text, the ratio of sentences in which performance words are detected, and the ratio of performance words within sentences. Through this, the power converter (150) can precisely calculate the importance regarding performance by determining that if the ratio of performance words used in the entire text is high, it is a word with a different meaning and lowering its importance.

[0100] The power converter (150) calculates special operating criteria based on the magnitudes of the temperature classification, time classification, and error classification in individual performance vectors. Since performance words are classified into one of the temperature classification, time classification, and error classification, the power converter (150) can determine the temperature importance, time importance, and error importance by summing the magnitudes of importance in each classification category.

[0101] The power conversion device (150) sets an operation standard (521) by combining the device operation standard (511), the general operation standard (512), and the special operation standard (513). Since the general operation standard (512) indicates information with parameters such as a reference temperature, a reference operation duration, and a reference error, the device operation standard (511) includes information regarding an allowable temperature and a recommended operation time, and the special operation standard (513) includes information regarding temperature importance, time importance, and error importance, the power conversion device (150) can calculate the operation standard (521) regarding the reference temperature, the reference operation duration, and the reference error by summing the allowable temperature and the recommended operation time according to the device operation standard (511) for the reference temperature and the reference operation duration within the general operation standard (512), and summing the weights according to the importance ratio of each element according to the special operation standard (513).

[0102] Subsequently, the power converter (150) generates a limiting signal (541) that limits the operation of the power converter (150) by comparing the operation state (531) measured from the data acquisition unit (340) with the operation standard (521). The operation state (531) may include the temperature due to heat generation inside the power converter (150), the duration of operation due to current operation, and a performance error regarding the difference between the predicted output voltage and the actual output voltage. If there is a parameter among the parameters in the operation state (531) that does not satisfy the operation standard (521), the power converter (150) may generate a limiting signal (541) to change the operation mode of the power converter (150) to a safe mode. Conversely, if all parameters in the operation state (531) satisfy the operation standard (521), the power converter (150) may not generate a limiting signal (541).

[0103] After generating a restriction signal (541), the power conversion device (150) transmits to the administrator terminal (110) whether the restriction signal (541) has been generated, and based on the response from the administrator terminal (110), can restrict the operation of the converter unit (320) and the inverter unit (330) using the restriction signal (541). When the restriction signal (541) is generated, the power conversion device (150) can transmit the fact of the generation of the restriction signal (541) to the administrator terminal (110) to request confirmation from the administrator. Subsequently, when the power conversion device (150) receives a command regarding operation restriction from the administrator terminal (110), it can restrict the overall operation of the power conversion device (150) by controlling the switches within the converter unit (320) and the inverter unit (330) using the restriction signal (541).

[0105] FIG. 6 illustrates an example (600) of a schematic diagram of a power conversion device (150) in a power conversion control system (100) according to various embodiments of the present disclosure.

[0106] Referring to FIG. 6, the power conversion device (150) comprises a rectifier (310), a converter (320), an inverter (330), and a control (350).

[0107] The rectifier (310) receives the power supply and performs the function of rectifying it. It can be composed of various conventional rectifier circuits. According to one embodiment of the present disclosure, the rectifier (310) may use a full-wave rectifier circuit or a half-wave rectifier circuit.

[0108] The converter section (320) performs the function of converting rectified power into DC power and includes a power factor compensation converter, an isolated DC / DC converter, and a step-down converter, and may further include a capacitor capable of DC linking between the isolated DC / DC converter and the step-down converter.

[0109] The power factor correction converter boosts the power rectified by the rectifier (310) and converts it into boosted DC power for output. It may be equipped with a power factor corrector (PFC) circuit capable of improving the input power factor. The isolated DC / DC converter isolates the power factor correction converter and the step-down converter and can boost or step down the input DC power to output isolated DC power. The step-down converter can use a chopper switch to step down the isolated power output from the isolated DC / DC converter and output it to the inverter (330).

[0110] The inverter unit (330) can convert the DC power output from the converter unit (320) into high-frequency AC power and supply power to an external medical device. The inverter unit (330) may comprise a switch in which four switching elements are connected in a full-bridge form, a resonant inductor, a capacitor, a high-frequency transformer, and an output voltage detection means.

[0112] FIG. 7 illustrates a flowchart (700) regarding a method in which a power conversion device (150) generates a limiting signal (541) that limits a converter unit (320) and an inverter unit (330) in a power conversion control system (100) according to various embodiments of the present disclosure.

[0113] The power conversion device (150) can generate a limiting signal (541) that limits the operation of the converter unit (320) and the inverter unit (330) using operation information (501) regarding the operation history of the power conversion device, device information (502) regarding a medical device connected to the power conversion device, record information (503) regarding the performance of the power conversion device, and environment information (504) regarding the operating environment of the power conversion device.

[0114] Referring to FIG. 7, in step (701), the power conversion device (150) obtains operation information (501), device information (502), and record information (503) based on the input of the manager. The power conversion device (150) can generate operation information (501), device information (502), and record information (503) based on receiving from the manager terminal (110) or direct input from the manager.

[0115] According to one embodiment of the present disclosure, operation information (501) includes the usage period, operation frequency, and standby time of the power conversion device, device information (502) includes the type of medical device and characteristics of each type, and record information (503) may include a manager's performance evaluation text recorded through a manager terminal.

[0116] In step (703), the power converter (150) requests the external server (130) to receive environment information (504) in response to the acquisition of operation information (501). When the power converter (150) receives the operation information (501), it may request the environment information (504) from the external server (130) to calculate the operation standard (521).

[0117] According to one embodiment of the present disclosure, environmental information (504) may include the medical departments of the medical institution where the power conversion device is used, the frequency of movement, and the accident history of nearby hospitals.

[0118] In step (705), the power converter (150) sets an operation standard (521) for changing the operation mode of the power converter (150) to a safe mode from operation information (501), device information (502), record information (503), and environment information (504). The power converter (150) can generate information regarding mode change to enable safe operation of the power converter (150) using the collected information. The method by which the power converter (150) sets the operation standard (521) is described in FIG. 8.

[0119] In step (707), the power conversion device (150) generates a limiting signal (541) that limits the operation of the power conversion device (150) by comparing the operation state (531) measured from the data acquisition unit (340) with the operation standard (521). The power conversion device (150) may generate the limiting signal (541) if at least one of the conditions according to the operation state (531) does not satisfy the conditions according to the parameters according to the operation standard (521). When the limiting signal (541) is generated, the power conversion device (150) transmits to the administrator terminal (110) whether the limiting signal (541) has been generated, and may limit the operation of the converter unit (320) and the inverter unit (330) using the limiting signal (541) based on the response from the administrator terminal (110).

[0121] FIG. 8 illustrates a flowchart (800) regarding a method for a power conversion device (150) to set an operation standard (521) in a power conversion control system (100) according to various embodiments of the present disclosure.

[0122] Referring to FIG. 8, in step (801), the power converter (150) checks the type of medical device and the characteristic parameters according to the type within the device information (502) to determine the device operation standard (511). In order to consider the characteristics of the medical device connected to the power converter (150), the power converter (150) can extract the device operation standard (511) according to the characteristics of the medical device from the device information (502).

[0123] In step (803), the power converter (150) determines general operating standards (512) by extracting feature parameters based on operation information (501) and environment information (504) from a pre-stored table. To consider general operating conditions based on the state in which the power converter is operated, the power converter (150) may extract a standard temperature, a standard operating duration, and a standard error based on device information (502) and environment information (504).

[0124] In step (805), the power converter (150) calculates a special operation standard (513) based on the detection frequency of performance words from the record information (503). The power converter (150) can determine the importance of each parameter from the record information (503) in order to consider the characteristics of the specified power converter (150).

[0125] According to one embodiment of the present disclosure, a power conversion device (150) detects performance words related to a manager's performance evaluation of the power conversion device (150) in record information (503), classifies each of the performance words into one of a temperature classification, a time classification, and an error classification by considering the meaning of the performance words, generates an individual performance vector indicating the importance of the performance words based on the number of times the performance words are detected, and calculates a special operation standard (513) based on the magnitude of each of the temperature classification, time classification, and error classification in the individual performance vector.

[0126] In step (807), the power converter (150) sets an operation standard (521) by combining the device operation standard (511), the general operation standard (512), and the special operation standard (513). The power converter (150) may set the operation standard (521) by applying the device operation standard (511) to the general operation standard (512) and then summing the weights according to the importance ratio of each element according to the special operation standard (513). According to one embodiment of the present disclosure, the feature parameter may indicate information having a reference temperature, a reference operation duration, and a reference error as parameters.

[0127] According to one embodiment of the present disclosure, the step according to FIGS. 7 and FIGS. 8 may be implemented as a computer program stored on a computer-readable recording medium or a computer-readable recording medium on which a computer program is stored, in order to perform the operation described above in combination with hardware.

[0129] Methods according to the embodiments described in the claims or specification of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software. A method according to an embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium, or may be implemented as a computer program stored on a computer-readable recording medium in combination with hardware.

[0130] When implemented in software, a computer-readable storage medium may be provided for storing one or more programs (software modules). One or more programs stored in the computer-readable storage medium are configured for execution by one or more processors within an electronic device. One or more programs include instructions that cause the electronic device to execute methods according to the embodiments described in the claims or specification of this disclosure.

[0131] Such programs (software modules, software) may be stored in random access memory, non-volatile memory including flash memory, read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), magnetic disc storage devices, compact disc-ROM (CD-ROM), digital versatile discs (DVDs), or other forms of optical storage devices, magnetic cassettes. Alternatively, they may be stored in memory composed of some or all of these. Additionally, each constituent memory may include multiple units.

[0132] Additionally, the program may be stored on an attachable storage device that can be accessed via a communication network such as the Internet, Intranet, LAN (local area network), WAN (wide area network), or SAN (storage area network), or a combination thereof. Such a storage device may be connected to a device performing an embodiment of the present disclosure through an external port. Additionally, a separate storage device on a communication network may be connected to a device performing an embodiment of the present disclosure.

[0133] In the specific embodiments of the present disclosure described above, the components included in the disclosure are expressed in a singular or plural form according to the specific embodiments presented. However, the singular or plural expression is selected to suit the situation presented for convenience of explanation, and the present disclosure is not limited to singular or plural components; even if a component is expressed in the plural form, it may be composed of a singular form, and even if a component is expressed in the singular form, it may be composed of a plural form.

[0134] Meanwhile, although specific embodiments have been described in the detailed description of the present disclosure, it is understood that various modifications are possible within the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the described embodiments, but should be defined by the claims set forth below as well as equivalents thereof. Explanation of the symbols

[0136] 110 Administrator Terminal 130 External Server 150 power converters 170 networks 210 Control unit 220 Switching unit 230 Transformer Section 240 Power Supply Section 310 Rectifier 320 Converter 330 Inverter unit 340 Data acquisition unit 350 Control unit 360 DC load 370 AC load 410 memory 420 Processor 430 Communications Unit 440 Input / Output Interface 450 Display Section 501 Operation Information 502 Device Information 503 Record Information 504 Environmental Information 511 Equipment Operation Standards 512 General Operation Standards 513 Special Operational Standards 521 Operational Standards 531 Operation status 541 Limit signal

Claims

Claim 1 A method of operating a power conversion device comprising: a rectifier unit for rectifying a supply power; a converter unit for converting a rectified power output from the rectifier unit into a DC power according to the operation of a switching element; an inverter unit for converting the DC power into an AC power; a data acquisition unit for collecting data related to the operating state of the power conversion device; and a control unit for controlling the converter unit and the inverter unit, wherein the method comprises the step of generating a restriction signal that restricts the operation of the converter unit and the inverter unit using operation information regarding the operation history of the power conversion device, device information regarding a medical device connected to the power conversion device, record information regarding the performance of the power conversion device, and environment information regarding the operating environment of the power conversion device, wherein the step of generating the restriction signal comprises: a step of acquiring the operation information, the device information, and the record information based on an input from an administrator; a step of receiving the environment information by requesting an external server in response to the acquisition of the operation information; and a step of setting an operation standard for changing the operation mode of the power conversion device to a safe mode from the operation information, the device information, the record information, and the environment information. A method comprising the step of generating a limiting signal that limits the operation of the power conversion device by comparing the operation state measured from the data acquisition unit with the operation standard. Claim 2 A method according to claim 1, wherein the step of setting the operation standard comprises: a step of confirming the device operation standard by verifying the type of medical device and the characteristic parameter according to the type within the device information; a step of determining the general operation standard by extracting the characteristic parameter according to the operation information and the environment information from a pre-stored table; a step of calculating the special operation standard according to the detection frequency of performance words from the record information; and a step of setting the operation standard by combining the device operation standard, the general operation standard, and the special operation standard. Claim 3 A method of claim 2, wherein the feature parameters indicate information having a reference temperature, a reference operation duration, and a reference error as parameters. Claim 4 A method according to claim 3, wherein the step of calculating the special operation standard comprises: detecting performance words related to the performance evaluation of the manager's power conversion device in the record information; classifying each of the performance words into one of a temperature classification, a time classification, and an error classification by considering the meaning of the performance words; generating an individual performance vector indicating the importance of the performance words based on the number of times the performance words are detected; and calculating the special operation standard based on the magnitude of each of the temperature classification, the time classification, and the error classification in the individual performance vector. Claim 5 A method according to claim 1, wherein the operation information includes the usage period, operation frequency, and standby time of the power conversion device, the device information includes the type of medical device and characteristics by type, and the environment information includes the medical department of the medical institution where the power conversion device is used, the frequency of movement, and the accident history of nearby hospitals. Claim 6 A computer program stored on a computer-readable recording medium to be combined with hardware to execute the operation of claim 1. Claim 7 A computer-readable recording medium storing a computer program that is combined with hardware to execute the operation of claim 1. Claim 8 delete Claim 9 delete Claim 10 delete

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