Abstract: A dryer includes: a conveyor belt having a shape of an endless loop to convey a sheet in a conveyance direction; a drying unit facing an absorption surface of the conveyor belt to dry the sheet on the absorption surface; and an absorber including multiple suction members inside the endless loop of the conveyor belt, the suction members arrayed in the conveyance direction to absorb the sheet onto the absorption surface of the conveyor belt, and at least one suction member of the multiple suction members to generate a suction force different from suction forces of other suction members.

Abstract: A heating device includes a heater and a cover to cover the heater. In the heating device, the cover includes a first cover disposed in a first direction of the heater and a second cover disposed in the first direction, and the second cover is adjacent to the first cover. In the heating device, the first cover and the second cover have a gap in between, and the gap has a length greater than an amount of thermal deformation of either one of the first cover or the second cover or a total amount of thermal deformation of the first cover and the second cover.

Abstract: An attachment mechanism includes a first holding member and a second holding member. The first holding member is configured to hold a device side plate of a belt device to attach a main body side plate of an apparatus in which the belt device is incorporated. The second holding member is configured to be fixed to the first holding member. The first holding member and the second folding member are configured to adjust a posture of the device side plate with respect to the main body side plate in assembly of the belt device.

Abstract: A power conversion device includes a power converter connected to a power storage element, and a control device. The control device includes a generator simulating unit to generate a voltage command value, and a signal generating unit to generate a control signal for the power converter based on the voltage command value. The generator simulating unit includes a first characteristics simulating unit to generate a first command value by simulating characteristics of a first synchronous generator, a second characteristics simulating unit to generate a second command value by simulating characteristics of a second synchronous generator different from the characteristics of the first synchronous generator, an adder to perform addition of the first command value and the second command value, and a voltage command generating unit to generate the voltage command value, based on an addition result of the first command value and the second command value.

Abstract: A control device includes a generator simulating unit to generate a phase of output voltage of a power converter by simulating characteristics of a synchronous generator, a first voltage command generating unit to generate a first voltage command value of output voltage of the power converter so that an AC voltage of a power grid attains a target voltage, a setting unit to set an overcurrent level, and a second command generating unit to generate a second voltage command value by limiting the first voltage command value based on the overcurrent level. The control device further includes a signal generating unit to generate a control signal for the power converter, based on the phase generated by the generator simulating unit and the second voltage command value.

Abstract: A power conversion device includes a power converter and a control device. The power converter converts a DC power output from a power storage element into an AC power. The control device includes a phase synchronizing unit to estimate a reference phase of an output voltage of the power converter synchronized with a phase of an AC voltage at an interconnection point, a characteristics simulating unit to generate an active power command value based on a phase difference between a reference phase and the phase of the AC voltage at the interconnection point, a DC voltage command generating unit to generate a DC voltage command value, a voltage command generating unit to generate an AC voltage command value so that an output current of the power converter becomes less than a threshold, and a signal generating unit to generate a control signal based on the AC voltage command value.

Abstract: A power converter interchanges electric power between a power storage device and a power grid as the power storage device is charged and discharged. A control device controls active power inputted and outputted between the power grid and the power converter. The control device generates a command value indicating an amount of output of active power for increase in grid frequency or an amount of input of active power for lowering in grid frequency, in accordance with an amount of frequency variation calculated from a frequency detection value of the power grid. Furthermore, the control device restricts output of active power in accordance with the command value when the frequency detection value is larger than a frequency reference value of the power grid and restricts input of active power in accordance with the command value when the frequency detection value is smaller than the frequency reference value.

Abstract: An open and close device, a sheet conveyor, and an image forming apparatus. The open and close device includes an open and close portion to open or shut, a biasing mechanism to bias the open and close portion in an opening direction, and a holder to hold the open and close portion shut. The biasing mechanism includes a first spring whose biasing force is invariable regardless of a stroke of the first spring, and a second spring whose biasing force is variable due to a stroke of the second spring. The sheet conveyor includes the open and close device, and the open and close portion includes a conveyor to convey a sheet. The image forming apparatus includes the sheet conveyor.

Abstract: A storage battery system includes a first storage battery unit. First storage battery unit includes a first converter that converts alternating current and direct current, a first storage battery, and a first controller that controls first converter, and first storage battery unit is interconnected to a system for supplying power. The first controller detects a frequency of the system, and controls first converter such that first storage battery outputs constant active power to the system on the basis of the frequency of the system falling below a first threshold value.

Abstract: A motor-driven compressor for a vehicle includes a control device and a detection circuit. The detection circuit includes an AD conversion circuit. The AD conversion circuit converts an on-voltage from an analog signal to a digital signal. The control device is configured to determine that a battery is in an overvoltage state and stop the motor-driven compressor for the vehicle when a value of the on-voltage detected from the digital signal is larger than an overvoltage determination threshold value.

Abstract: In an energy storage system connected to a power line of a power grid, electric energy is input and output to and from at least one energy storage device. At least one power converter is provided between the power line and the at least one energy storage device. A power detector detects active power flowing through the power line. A control unit controls an operation of the at least one power converter, thereby causing active power either to be output from the at least one energy storage device to the power line or to be input to the at least one energy storage device from the power line such that a variation in active power detected by the power detector is compensated.

Abstract: A management apparatus periodically transmits information for setting a first voltage range and a second voltage range smaller than the first voltage range to a distribution power supply apparatus. The distribution power supply apparatus removes, from an interconnection point voltage at an interconnection point with the distribution system, a voltage fluctuation component with a cycle shorter than a cycle in which the information is transmitted from the management apparatus to thereby generate a voltage command value of the interconnection point, and performs reactive power control for eliminating a voltage deviation of the interconnection point voltage with respect to the voltage command value. In the reactive power control, the generation of the reactive power is started when an absolute value of the voltage deviation exceeds the first voltage range, and the reactive power is adjusted until the absolute value falls below the second voltage range.

Abstract: A device attaches and detaches at least one of rollers in a belt conveyor in which an endless belt is wound around the rollers between a front plate and a rear plate of the belt conveyor. The device includes a guide and a roller holder. The guide has a base end and extends along a longitudinal direction of the detachable roller and includes a guide groove. The roller holder holds the detachable roller and includes an engagement portion, another engagement portion, and a guided portion. The engagement portion detachably engages with the front plate. The other engagement portion detachably engages with the rear plate. The guided portion slides along the guide groove toward the rear side or the front side of the device to engage or disengage the engagement portion with or from the front plate and engage or disengage the other engagement portion with or from the rear plate.

Abstract: A storage battery system includes a first storage battery unit. First storage battery unit includes a first converter that converts alternating current and direct current, a first storage battery, and a first controller that controls first converter, and first storage battery unit is interconnected to a system for supplying power. The first controller detects a frequency of the system, and controls first converter such that first storage battery outputs constant active power to the system on the basis of the frequency of the system falling below a first threshold value.

Abstract: A cooling device includes a cooling member to absorb heat from a conveyed sheet and a plurality of cooling units to cool the cooling member. Each of the cooling units includes a coolant channel through which a coolant flows and a liquid-cooling device configured to cool the coolant that flows in the coolant channel. The coolant channels are disposed on or inside the cooling member and arranged side by side in a sheet conveyance direction. The coolant channels includes a downstream coolant channel being downstream from at least one of the plurality of coolant channels in the sheet conveyance direction, and an upstream coolant channel being upstream from the downstream coolant channel in the sheet conveyance direction. One of the liquid-cooling devices coupled to the downstream coolant channel has a cooling capacity higher than a cooling capacity of another of the liquid-cooling devices coupled to the upstream coolant channel.

Abstract: In a storage battery system charging control device, on the basis of estimated temperature data until the end of life of a storage battery calculated by a power estimation unit, an ambient temperature estimation unit, and a temperature estimation unit, and a deterioration coefficient stored in a data storage unit, a capacity retention calculation unit sequentially calculates capacity retention data with respect to each state of charge until the end of life of the storage battery, using the state of charge as a parameter. A cumulative capacity calculation unit calculates a cumulative capacity corresponding to each state of charge, on the basis of the rated capacity of the storage battery and the capacity retention data. A charging control voltage determination unit determines charging control voltage on the basis of the cumulative capacities calculated by the cumulative capacity calculation unit.

Abstract: A sheet correcting device includes a plurality of curved surface members including curved surfaces, respectively, to deform a sheet along the curved surfaces, the plurality of curved surface members disposed along a conveyance direction of the sheet, a plurality of pressing members disposed facing the curved surfaces of the plurality of curved surface members, respectively, to press the sheet against the curved surfaces of the plurality of curved surface members, respectively, a sheet tensioner to apply tension to the sheet, and a heater to heat the sheet that is bent by the curved surfaces of the plurality of curved surface members.

Abstract: A power conversion device includes: a power converter circuit which converts a direct-current power, output from a decentralized power supply, into an alternating-current power, and outputs the alternating-current power to a power distribution grid; a voltage target value generation unit which removes a high-frequency variation from a root mean square of a voltage detected by a voltage detection unit to generate a voltage target value; a correction unit which corrects the voltage target value when the correction unit detects that the automatic voltage regulator has performed an action; and a command unit which, if the voltage at the point of interconnection detected by the voltage detection unit deviates from a voltage control deadband referenced to the voltage target value, commands the power converter circuit to output a reactive power based on a magnitude of the deviated amount of voltage.

Abstract: An attachment mechanism includes a first holding member and a second holding member. The first holding member is configured to hold a device side plate of a belt device to attach a main body side plate of an apparatus in which the belt device is incorporated. The second holding member is configured to be fixed to the first holding member. The first holding member and the second folding member are configured to adjust a posture of the device side plate with respect to the main body side plate in assembly of the belt device.

Abstract: A power conversion device includes: a power converter circuit which converts a direct-current power, output from a decentralized power supply, into an alternating-current power, and outputs the alternating-current power to a power distribution grid; a voltage target value generation unit which removes a high-frequency variation from a root mean square of a voltage detected by a voltage detection unit to generate a voltage target value; a correction unit which corrects the voltage target value when the correction unit detects that the automatic voltage regulator has performed an action; and a command unit which, if the voltage at the point of interconnection detected by the voltage detection unit deviates from a voltage control deadband referenced to the voltage target value, commands the power converter circuit to output a reactive power based on a magnitude of the deviated amount of voltage.