Abstract: A motor controller includes a plurality of inverters that supply power to a corresponding motor of a plurality of motors through pulse width modulation control, a direct current power supply that supplies power to the plurality of inverters, and a capacitor connected parallel to the direct current power supply. Each of the plurality of inverters is categorized into one of a plurality of groups based on a switching frequency. All inverters in each of the groups have corresponding carrier signals being triangular wave signals determined based on a reference frequency assigned to the group. At least one of the triangular wave signals has at least one of a frequency or a phase different from a frequency or a phase of another triangular wave signal of the triangular wave signals.

Abstract: A motor controller includes a plurality of inverters that supply power to a corresponding motor of a plurality of motors through pulse width modulation control, a direct current power supply that supplies power to the plurality of inverters, and a capacitor connected parallel to the direct current power supply. Each of the plurality of inverters is categorized into one of a plurality of groups based on a switching frequency. All inverters in each of the groups have corresponding carrier signals being triangular wave signals determined based on a reference frequency assigned to the group. At least one of the triangular wave signals has at least one of a frequency or a phase different from a frequency or a phase of another triangular wave signal of the triangular wave signals.

Abstract: A motor controller includes a plurality of inverters that supply power to a corresponding motor of a plurality of motors through pulse width modulation control, a direct current power supply that supplies power to the plurality of inverters, and a capacitor connected parallel to the direct current power supply. Each of the plurality of inverters is categorized into one of a plurality of groups based on a switching frequency. All inverters in each of the groups have corresponding carrier signals being triangular wave signals determined based on a reference frequency assigned to the group. At least one of the triangular wave signals has at least one of a frequency or a phase different from a frequency or a phase of another triangular wave signal of the triangular wave signals.

Abstract: A DC power supply device capable of preventing voltage oscillation of a power supply path to a motor control device is provided. The DC power supply device includes a power supply unit (such as an AC/DC converter) that outputs a DC and a filter circuit that detects a voltage fluctuation of the DC output from the power supply unit and adjusts impedance of own circuit such that the voltage fluctuation of the DC is prevented based on a detection result.

Abstract: A design assist device assists with designing of a power supply system to supply and distribute power from a power supply and a capacitor connected parallel to each other to a plurality of load devices through a power supply path combining a plurality of power cables. The design assist device includes a calculator and an outputter. The calculator calculates time-series data about a current flowing through the capacitor based on configuration information representing an overall configuration of the power supply path and operation pattern information representing an operation pattern of each of the plurality of load devices, and calculates, based on the time-series data about the current, a recommended capacitance being a capacitance recommended for the capacitor. The outputter outputs at least information about the recommended capacitance for the capacitor.

Abstract: A servo direct-current feeder system can reduce an oscillating voltage across a power feeding path. The servo direct-current feeder system includes a direct-current power supply, a plurality of motor controllers that each control a servomotor, and a power feeding path that distributes power from the direct-current power supply to the plurality of motor controllers. Each of the plurality of motor controllers includes a current control loop unit that controls a current flowing through the servomotor. The current loop unit includes a current control loop including a notch filter having a center frequency corresponding to a frequency to occur from an oscillating voltage across the power feeding path.

Abstract: Provided are embodiments for a method for managing a multi-group virtual conference. Embodiments can include providing user access to at least one cluster of a plurality of clusters in a virtual conference and determining at least one feature word representing a topic for each of the plurality of clusters. Embodiments can also include displaying in each of the plurality of clusters the at least one feature word and receiving a user input to modify user participation in the at least one cluster. Also provided are embodiments for a system and computer program product for managing the multigroup virtual conference.

Abstract: Embodiments of the invention are directed to a computer-implemented method of managing message relationships in a messaging system. The computer-implemented method includes receiving, using a processor system, a modification to a first message. The processor system is used to perform a significance-level evaluation of the modification to the first message. Based at least in part on a first result of the significance-level evaluation, the first message is deleted and the modification to the first message is maintained. Based at least in part on a second result of the significance-level evaluation, the first message is maintained; the modification to the first message is stored in a database; and the first message is associated with the modification to the first message in the database.

Abstract: A computer-implemented method for generating information associated with unknown verbal communications is disclosed. The computer-implemented method includes receiving a user indication of an unknown verbal communication. The computer-implemented method further includes displaying a potential unknown word list to the user, wherein the potential unknown word list includes words corresponding to verbal communications that occurred prior to receiving the user indication of the unknown verbal communication. The computer-implemented method further includes identifying that a word is selected from the potential unknown word list. The computer-implemented method further includes generating, in response to identifying that the word is selected from the potential unknown word list, additional information associated with the selected word.

Abstract: Provided are embodiments for a method for managing a multi-group virtual conference. Embodiments can include providing user access to at least one cluster of a plurality of clusters in a virtual conference and determining at least one feature word representing a topic for each of the plurality of clusters. Embodiments can also include displaying in each of the plurality of clusters the at least one feature word and receiving a user input to modify user participation in the at least one cluster. Also provided are embodiments for a system and computer program product for managing the multigroup virtual conference.

Abstract: Embodiments of the invention are directed to a computer-implemented method of managing message relationships in a messaging system. The computer-implemented method includes receiving, using a processor system, a modification to a first message. The processor system is used to perform a significance-level evaluation of the modification to the first message. Based at least in part on a first result of the significance-level evaluation, the first message is deleted and the modification to the first message is maintained. Based at least in part on a second result of the significance-level evaluation, the first message is maintained; the modification to the first message is stored in a database; and the first message is associated with the modification to the first message in the database.

Abstract: A DC power supply device capable of preventing voltage oscillation of a power supply path to a motor control device is provided. The DC power supply device includes a power supply unit (such as an AC/DC converter) that outputs a DC and a filter circuit that detects a voltage fluctuation of the DC output from the power supply unit and adjusts impedance of own circuit such that the voltage fluctuation of the DC is prevented based on a detection result.

Abstract: A computer-implemented method for generating information associated with unknown verbal communications is disclosed. The computer-implemented method includes receiving a user indication of an unknown verbal communication. The computer-implemented method further includes displaying a potential unknown word list to the user, wherein the potential unknown word list includes words corresponding to verbal communications that occurred prior to receiving the user indication of the unknown verbal communication. The computer-implemented method further includes identifying that a word is selected from the potential unknown word list. The computer-implemented method further includes generating, in response to identifying that the word is selected from the potential unknown word list, additional information associated with the selected word.

Abstract: A servo direct-current feeder system can reduce an oscillating voltage across a power feeding path. The servo direct-current feeder system includes a direct-current power supply, a plurality of motor controllers that each control a servomotor, and a power feeding path that distributes power from the direct-current power supply to the plurality of motor controllers. Each of the plurality of motor controllers includes a current control loop unit that controls a current flowing through the servomotor. The current loop unit includes a current control loop including a notch filter having a center frequency corresponding to a frequency to occur from an oscillating voltage across the power feeding path.

Abstract: The design assistance device includes: an acquisition unit configured to acquire system information indicating a configuration of the DC bus of the DC power supply system; and an output unit configured to output information on stability of the DC power supply system based on the system information acquired by the acquisition unit and a current value required for each operation of the one or more servo devices. With this configuration, it is possible to analyze the stability of a DC power supply system in which power is supplied from a DC power supply to one or more servo devices including an inverter circuit and an electric motor by a DC bus, in consideration of the configuration of the DC bus.

Abstract: A multilayered printed matter is made up of a plurality of layers formed on a medium, including a front layer and a back layer with patterns printed thereon, and a white layer and a black layer interposed between the front layer and the back layer so as to conceal the back layer to be invisible from the front-layer side. The system for producing the multilayered printed matter includes a computer that executes a printing step of moving the medium and an inkjet head relative to each other using a moving device and printing the front, back, white, and black layers on the medium using the inkjet head, and a cutting step, subsequent to the printing step, of moving the medium and a cutting blade relative to each other using the moving device and cutting the medium using the cutting blade.

Abstract: A method, a computer program product, and a computer system for securely sharing confidential information in a document. A first computer sets one or more confidential attributes of the confidential information in the document and creates metadata of the confidential information. The first computer creates a first file including the confidential information and the metadata. The first computer creates a second file including non-confidential information in the document and the metadata; the metadata in the second file is as a reference to the confidential information. The confidential information in the first file is displayed by a second computer at a confidential information visibility level in accordance with an authorization level of an authorized user of the second computer. The second file is displayed at a visibility level without showing the confidential information and is accessible by all users.

Abstract: A method, a computer program product, and a computer system for securely sharing confidential information in a document. A first computer sets one or more confidential attributes of the confidential information in the document and creates metadata of the confidential information. The first computer creates a first file including the confidential information and the metadata. The first computer creates a second file including non-confidential information in the document and the metadata; the metadata in the second file is as a reference to the confidential information. The confidential information in the first file is displayed by a second computer at a confidential information visibility level in accordance with an authorization level of an authorized user of the second computer. The second file is displayed at a visibility level without showing the confidential information and is accessible by all users.

Abstract: A computer program product and a computer system for securely sharing confidential information in a document. A first computer sets one or more confidential attributes of the confidential information in the document and creates metadata of the confidential information. The first computer creates a first file including the confidential information and the metadata. The first computer creates a second file including non-confidential information in the document and the metadata; the metadata in the second file is as a reference to the confidential information. The confidential information in the first file is displayed by a second computer at a confidential information visibility level in accordance with an authorization level of an authorized user of the second computer. The second file is displayed at a visibility level without showing the confidential information and is accessible by all users.

Abstract: A method, a computer program product, and a computer system for securely sharing confidential information in a document. A first computer sets one or more confidential attributes of the confidential information in the document and creates metadata of the confidential information. The first computer creates a first file including the confidential information and the metadata. The first computer creates a second file including non-confidential information in the document and the metadata; the metadata in the second file is as a reference to the confidential information. The confidential information in the first file is displayed by a second computer at a confidential information visibility level in accordance with an authorization level of an authorized user of the second computer. The second file is displayed at a visibility level without showing the confidential information and is accessible by all users.