Abstract: A small-scale application apparatus including an ozone generation apparatus configured to generate ozone gas, the application apparatus being configured to perform ozone usage processing. The ozone generation apparatus includes a load-resonant high-frequency step-up transformer configured to obtain a stepped-up high-frequency voltage and an ozone generator configured to receive the stepped-up high-frequency voltage as an operating voltage to generate the ozone gas having an ozone concentration of at least 200 g/m3 from raw gas containing oxygen gas. The application apparatus receives the ozone gas under a pressure environment of at least 0.2 MPa.

Abstract: A DC/DC converter system includes a current sensor sensing a current flowing from a photovoltaic panel to a power converter device, and a DC/DC converter provided between a battery facility and the power converter device and configured to convert first DC power output from the battery facility into second DC power. The DC/DC converter includes a first operation mode in which the second DC power is generated to allow an output current and an output voltage to simulate the photovoltaic-cell current-voltage characteristics according to a current value sensed with the current sensor. The DC/DC converter may also include a second operation mode executing a boost operation of increasing a potential at a connection node, and a third operation mode in which a voltage at the connection node is converted to charge the battery facility. The DC/DC converter can selectively switch among the first, second, and third operation modes.

Abstract: A resin producing method is a method of producing a resin with which an insulating structure formed on an outer peripheral portion of a conductor is impregnated, the method including: a filler mixing step of mixing a nanofiller at a ratio of 15 wt % or more with an epoxy resin to form a mixture; a shear mixing step of causing the mixture to be subjected to shear mixing; a diluent mixing step of mixing a reactive diluent that reduces a viscosity of the epoxy resin, with the mixture after the shear mixing step; and a curing agent mixing step of mixing an acid anhydride curing agent with the mixture after the diluent mixing step.

Abstract: A photovoltaic power generation system includes a plurality of photovoltaic cell arrays, a plurality of power conditioners connected respectively with the plurality of photovoltaic cell arrays, and a high order device connected to the plurality of power conditioners. The high order device is configured to execute: a first output control to adjust output power of a designated power conditioner to a predetermined output power amount being set in advance; and a second output control to adjust output power from a remaining power conditioner which is other than the designated power conditioner among the plurality of power conditioners. The high order device is configured to execute characteristic-data acquisition to acquire an input/output electrical characteristic of the designated power conditioner during execution of the first output control.

Abstract: A motor drive apparatus that can continue operation within the upper limit of system control even if a voltage drop of an AC power source occurs during operation of a motor used for a hoist or a crane is provided. The inverter control unit of the motor drive apparatus includes a speed reference setting means for setting the rotation speed of the motor, means for detecting a speed deviation between the output of the rotation speed detection means for detecting the rotation speed of the motor and the output of the speed reference setting means, means for controlling the output current of the inverter according to the output of the speed deviation. The speed reference setting means includes a correction circuit for correcting an external speed command given from outside.

Abstract: A two fluid spray equipment includes: two fluid nozzles of a plurality of systems; a water supply apparatus for supplying the pressurized water at common pressure; a compressed air supply apparatus for supplying the compressed gas at common pressure; and a plurality of spray control units for controlling spray of the two fluid nozzle of each of the plurality of systems, wherein each of the plurality of spray control units includes a water pressure control unit for performing control to reduce pressure of the pressurized water supplied from the water supply apparatus based on a spray command value without pressurization, and an air pressure control unit for controlling pressure of the compressed gas supplied from the compressed air supply apparatus based on the spray command value.

Abstract: A power conversion system includes: a power converter connected between a DC power source and an AC power source; an AC switch connected between the power converter and the AC power source; an AC capacitor connected on the power converter side relative to the AC switch, on an output side of the power converter; and a control device configured to, in a state in which the AC switch is open, recognize a voltage of the AC capacitor and control the power converter to bring an output voltage of the power converter close to a voltage of the AC power source from the voltage of the AC capacitor gradually or in a step-by-step manner, and then close the AC switch. The power conversion system can suppress overcurrent at a time of start-up of a power converter and inrush current at a time of interconnection to an AC power source.

Abstract: A squirrel-cage induction rotating electrical machine comprises: a solid rotor, a stator, and bearings. The solid rotor includes a shaft part, a columnar-shaped rotor core part integrally formed with the shaft part and having rotor slots formed therein, and a plurality of conductor bars passing through the respective rotor slots and coupled together at both axial ends outside the rotor core part. The stator includes a cylindrical stator core provided radially outside the rotor core part, and stator windings passing through a plurality of respective stator slots which are formed in the radially inner surface of the stator core. An outer wall and an inner wall of each rotor slot are tilted at a predetermined angle or more with respect to a plane including a rotation axis of the shaft part.

Abstract: According to an embodiment of the invention, a coating head of a mist coating film formation apparatus including a main body is provided. The main body includes a top plate in which a supply port capable of supplying one of a cleaning liquid or a mist of a source material solution is provided, a bottom plate provided below the top plate in a vertical direction, and a sidewall provided between the top plate and the bottom plate; and the sidewall includes an upper end and a lower end connected respectively to the top plate and the bottom plate and forms an interior space with the top plate and the bottom plate. The sidewall includes a slit spraying the mist externally from the interior space, and a recovery port capable of recovering the supplied cleaning liquid or a mist coalescing in the interior space. The bottom plate includes a slope having a height becoming lower from an inner perimeter of the sidewall toward the recovery port.

Abstract: A power conversion apparatus includes: a first stage on which a first module is mounted, a second stage stacked on the first stage and on which a second module is mounted, and a coolant circulation circuit allowing a coolant to circulate through the first and second modules. The coolant circulation circuit includes a first cooling pipe disposed on the first stage, a second cooling pipe disposed on the second stage, a first connecting member provided at an opening end of the first cooling pipe, a second connecting member provided at an opening end of the second cooling pipe, a connecting pipe connecting the first connecting member and the second connecting member, a first coupler that couples a first end portion of the connecting pipe to the first connecting member, and a second coupler that couples a second end portion of the connecting pipe to the second connecting member.

Abstract: A state estimation system for a power conversion semiconductor apparatus in an embodiment includes an analysis processing unit and an estimation processing unit. The analysis processing unit projects points indicating a combination of a voltage detection value in first time history data of a voltage between the pair of main terminals detected when the pair of main terminals are forward-biased and when the pair of main terminals are reverse-biased and a current detection value in second time history data of detection values of both a forward current and a reverse current between the pair of main terminals onto a coordinate plane including a voltage axis and a current axis on the basis of the first time history data and the second time history data in the power conversion semiconductor apparatus including the pair of main terminals and derives a distribution of the projected points on the coordinate plane.

Abstract: A power conversion apparatus includes a power conversion circuit configured to convert DC power into three-phase AC power; and a control device configured to generate a two-phase negative-phase current from a three-phase AC current output from the power conversion circuit, and to detect an open phase on an output side of the power conversion circuit based on a magnitude of an amplitude of the two-phase negative-phase current. The control device may be configured to determine an occurrence of the open phase when the magnitude of the amplitude of the two-phase negative-phase current increases, and an electric current of at least one phase of the three-phase AC current decreases.

Abstract: A converter controller configured to control a firing phase of a converter includes an integral element integrating a deviation of DC current from a current command value and generates a voltage command value of output voltage of the converter by performing control calculation of the deviation. In a first mode of performing commutation of an inverter by intermittently setting DC current to zero, the converter controller sets DC current to zero for a predetermined pause time by narrowing a phase control angle simultaneously with a commutation command for the inverter. When the control calculation is resumed immediately after the pause time, the converter controller uses a control amount calculated in control calculation immediately before the pause time as a preset value of the integral element immediately after the pause time.

Abstract: A power conversion system includes plural power conversion apparatuses and a server connected to each of the plural power conversion apparatuses. Each of the plural power conversion apparatuses includes a power conversion circuit interconnected with a power system, a calculating unit configured to calculate, based on an output current and an output voltage of the power conversion circuit, at least one information of reactive power and a reactive current output by the power conversion circuit, a storing unit configured to accumulate, in a storage device, time-series reactive power information which is information associating time and the at least one information calculated by the calculating unit, and a communication interface configured to transmit the time-series reactive power information stored in the storage device to the server. The server is constructed to collect the time-series reactive power information of each of the plural power conversion apparatuses via the communication interface.

Abstract: There is provided a manufacturing facility diagnosis support apparatus that can support efficient diagnosis of a manufacturing facility even when past operation information on the manufacturing facility is not present. The diagnosis support apparatus includes a storage unit configured to store operation information in each of processes of a manufacturing facility for processing a material and information on a position of the material in association with each other, and an extraction unit configured to extract, when a range including the position of the material is designated, operation information changed at a position corresponding to the designated range, from the operation information stored in the storage unit. According to the diagnosis support apparatus, it is possible to support efficient diagnosis of the manufacturing facility even when the past operation information on the manufacturing facility is not present.

Abstract: A power converter according to an aspect of an embodiment includes: a diode converter; an inverter; a smoothing capacitor; a resistor; a current sensor; an estimation unit; and a control unit. The diode converter rectifies an alternating current from a power supply. The inverter is formed such that a DC side is connected to a DC output of the diode converter and an AC side is connected to an electric motor and includes a semiconductor switching element which converts DC power on the DC side into AC power and a reverse connection diode which is connected in antiparallel with the semiconductor switching element. The smoothing capacitor is provided in the DC output of the diode converter. The resistor is connected in parallel with the smoothing capacitor. The current sensor detects a load current flowing between the inverter and the electric motor. The estimation unit calculates an estimation value of the DC voltage Vdc on the DC side on the basis of a current value I detected by the current sensor.

Abstract: A master controller controls a plurality of uninterruptible power supply apparatuses each including a slave controller and detection circuits that detect at least a DC input voltage, an AC output voltage, and an output current of an inverter. The master controller generates a first voltage command value and a second voltage command value common to the plurality of uninterruptible power supply apparatuses based on detection values from the detection circuits transmitted from the slave controller of each of the uninterruptible power supply apparatuses. The master controller transmits the generated first and second voltage command values to the slave controller of each of the uninterruptible power supply apparatuses. The slave controller generates a first control signal for controlling a converter in accordance with the received first voltage command value. The slave controller generates a second control signal for controlling the inverter in accordance with the received second voltage command value.

Abstract: In this power conversion device, first three-phase AC voltages generated by an inverter and an AC filter are divided by first to third voltage dividers to generate second three-phase AC voltages, and third three-phase AC voltages that are line-to-line voltages of the second three-phase AC voltages and a neutral point voltage of the first three-phase AC voltages are detected. Then, DC components of the third three-phase AC voltages resulting from errors of voltage ratios of the first to third voltage dividers are obtained based on the detection results and contents in a storage unit, the DC components are removed from the third three-phase AC voltages to generate fourth three-phase AC voltages, and the inverter is controlled such that DC components of the fourth three-phase AC voltages are eliminated.

Abstract: A gas ejector of a gas supply apparatus includes a nozzle portion. The opening of a first-stage restricting cylinder constituting the nozzle portion has a circular cross-sectional shape with a diameter r1. A second-stage restricting cylinder is continuously formed with the first-stage restricting cylinder along a Z direction. The opening of the second-stage restricting cylinder has a circular cross-sectional shape with a diameter r2, and supplies a source gas supplied from the first-stage restricting cylinder to a low-vacuum processing chamber below. At this time, the diameter r2 is set to satisfy “r2>r1”.

Abstract: A power conversion device includes first to fourth switching elements, and first to eighth diodes. The first to fourth diodes are electrically connected in inverse parallel to the first to fourth switching elements, respectively. The seventh diode is electrically connected in parallel to the second diode. The eighth diode is electrically connected in parallel to the third diode. The second diode is housed in a first package. The seventh diode is housed in a second package, which is different from the first package, and which does not include the switching elements. The eighth diode is housed in the second package, or alternatively, the eighth diode is housed in another package, which is different from the first package and the second package, and which does not include the switching elements.