Abstract: A gate drive circuit including a drive-on element that applies an on-state voltage to a gate of a drive target semiconductor element and a drive-off element that applies an off-state voltage to the gate is such that a recovery switch, a reactor, and a capacitor are connected in series between output terminals of the gate drive circuit as a recovery circuit that can recover a charge accumulated in input capacitance of the drive target semiconductor element when turning on, and the drive-on element, the drive-off element, and the recovery switch are controlled by a control circuit, whereby power consumption of the gate drive circuit is reduced.

Abstract: A temperature estimation device calculates a first estimation temperature of a reactor on the basis of a reference estimation temperature to which a first lag period is provided and outputs from a temperature change amount calculation unit to which a second lag period is provided, predicts a second temperature change amount of the reactor over a predetermined period on the basis of the first estimation temperature, and then predicts a second estimation temperature of the reactor.

Abstract: This power conversion device includes: a rectification circuit; an inverter circuit having a full-bridge configuration, and having a DC capacitor, and first and second legs each of which has two switching elements connected in series to each other; a transformer; and a control circuit for controlling operation of the inverter circuit, wherein the control circuit controls an ON period for the first leg, thereby controlling increase/decrease in current flowing through a first rectification circuit from an AC input, and controls an ON period for the second leg and a phase shift amount between the ON period for the first leg and the ON period for the second leg, thereby controlling voltage of the DC capacitor to be constant. Thus, it becomes possible to achieve high-power-factor control and output power control at the same time by a single stage of full-bridge inverter circuit.

Abstract: An information processing apparatus includes: a registration unit configured to receive registration of action schedules from users and store the action schedules in action schedule information; a selection unit configured to extract, from the action schedule information, users who registered an action schedule of heading for a prescribed destination, and select the extracted users as ride-sharing candidate, users; and a notification unit configured to notify, the ride-sharing candidate users, of proposal information that includes proposal of moving to the prescribed destination by riding on a shared vehicle.

Abstract: An information processing device includes: a storage unit configured to store rental conditions of a vehicle presented by an owner of the vehicle and rental result information of the vehicle; an acquisition unit configured to acquire rental conditions and rental result information of the first vehicle from the storage unit; an analysis unit configured to extract rental result information of a second vehicle, the rental conditions of the first vehicle and rental conditions of the second vehicle being common in at least a part, compare and analyze the rental result information of the second vehicle and the rental result information of the first vehicle; a generation unit configured to generate, based on an analysis result, recommendation information on the rental conditions of the first vehicle for improving a rental result of the first vehicle; and an output unit configured to output the recommendation information.

Abstract: An information retrieval server includes a communication device and a processing device. The communication device communicates with servers of a plurality of business operators and a communication terminal of a user through a communication network, each of the plurality of business operators performing a car sharing service. The processing device presents information relevant to vehicles held by the plurality of business operators, to the user, acquires information input from the communication terminal, the information being information about a predetermined item included in a use condition for the car sharing service, causes the servers of the plurality of business operators to retrieve a vehicle satisfying a use condition determined by the acquired information, from the held vehicles, and sends information relevant to the retrieved vehicle, to the communication terminal.

Abstract: An information processing apparatus is provided that includes: a registration part that receives registration of a particular vehicle type and color from a user and stores the particular vehicle type and color as specified vehicle information; a vehicle place acquisition part that acquires a specified place where a vehicle according to the specified vehicle information is available; a positional information acquisition part that acquires positional information of the user; a judgment part that judges whether a distance between the specified place and a position indicated by the positional information is within a predetermined range, based on information acquired by the vehicle place acquisition part and the positional information acquisition part; and a notification part that notifies the user that the vehicle according to the specified vehicle information is available when the judgment part judges that the distance is within the predetermined range.

Abstract: An information processing apparatus includes an acquisition unit configured to acquire at least one of weather information and time information of a predetermined area as an environmental parameter, a use history unit configured to acquire a use history including a use section, a use time, and vehicle information of a vehicle previously used by a user, a prediction unit configured to perform a demand prediction of a vehicle to be used by the user based on correspondence information with the environmental parameter and the use history stored in association with each other, and a vehicle arrangement plan output unit configured to output a plan of arrangement locations of the vehicles planed based on the demand prediction of the vehicle performed by the demand prediction unit.

Abstract: A car sharing system includes at least one processor configured to: acquire an evaluation result of a user who uses a vehicle; and set contents of a car sharing service that the user can use from a next time, based on the acquired evaluation result.

Abstract: Disclosed is an information processing apparatus including a reception unit configured to receive a use reservation of car sharing including designation of any one of round-trip car sharing and one-way car sharing, designation of a pickup location, and designation of a drop-off location from a user and store the use reservation in a use reservation database, and a selection unit configured to select, as users who share a ride in a vehicle, both of a first user who has made a use reservation for designating round-trip car sharing and a second user who has made a use reservation for designating one-way car sharing among a plurality of users who have made a use reservation with a pickup location and a drop-off location satisfying a predetermined condition.

Abstract: A DC/DC converter enabling a step-up operation and a step-down operation in a bidirectional power transmission, and capable of adjusting transmission power amount with a good response. A DC/DC converter decreases a first phase shift amount and increases a second phase shift amount, as a first transmission power amount increases, when a first transmission power amount is larger than a first reference point.

Abstract: An information processing device include: a first accepting unit that accepts, from an owner, setting of conditions for renting his or her vehicle; a second accepting unit that accepts, from each of a plurality of users, setting of preferred conditions for using a vehicle; and a selecting unit that combines two or more of the preferred conditions for using a vehicle, which include at least a preferred condition that the user wants to use the one-way car sharing, compares the combined two or more preferred conditions for using a vehicle with the conditions for renting the vehicle, and if the combined two or more preferred conditions for using a vehicle match the conditions for renting the vehicle, selects each user having set the preferred conditions that match the conditions for renting the vehicle as users permitted to use the vehicle.

Abstract: An electric power converter including an electric-power conversion circuit that performs bidirectional conversion of a voltage between a DC power source and a motor and outputs the voltage, a first voltage detector that detects an inter-terminal voltage at the DC power source side of the electric-power conversion unit, a second voltage detector that detects an inter-terminal voltage at the motor side of the electric-power conversion unit, and a controller. The controller includes a first calculator that calculates a main duty, based on a target voltage and the inter-terminal voltage at the motor side, and a second calculator that calculates a sub-duty, based on the main duty, the inter-terminal voltage at the motor side, and the inter-terminal voltage, at the DC power source side, detected by the second voltage detection unit. The controller calculates a duty amount for operating the electric-power conversion unit, based on the main duty and the sub-duty.

Abstract: A medium processing apparatus includes a sensor that is intermittently energized and detects a predetermined physical quantity and outputs the detection value in the energization period, the sensor stabilizing its output after an output stabilization period, which is shorter than the energization period, has lapsed, a storage unit that stores the detection value that has been detected by the sensor before the lapse of the energization period and after the lapse of the output stabilization period, and a controller that reads the detection value from the storage unit and performs a predetermined process by using the detection value read.

Abstract: A parallel power supply device includes a plurality of DC/DC converters connected in parallel, and each DC/DC converter includes: first and second switching circuits with a transformer therebetween; first and second reactors; and a control circuit. The control circuit generates a duty cycle so that a deviation between voltage of a load and target voltage becomes 0. Correction is performed such that, when the magnitude of the duty cycle is smaller than a set value Vth, the magnitude is fixed at 0, and otherwise, the magnitude is decreased by the set value Vth. Then, the phase shift amounts for drive signals for the first and second switching circuits are determined, and the first and second switching circuits are subjected to phase shift control.

Abstract: A transformer is composed of three or more windings magnetically coupled. An AC/DC converter (2) for converting AC power of an AC power supply (1), a capacitor (3), and a switching circuit (4) are connected to one winding (6a), and a switching circuit (8) or (30) for power conversion of a DC power supply is connected to at least one of the other windings. Voltage of the capacitor (3) or the AC power supply (1) is detected. On the basis of the detected value thereof, the operation state of each switching circuit (4), (8), (30) is determined by an operation state determination circuit (101). On the basis of a result of the determination, the power supply is switched among the AC power supply (1) and the DC power supplies (11) and (34) by an output switch circuit (103).

Abstract: A power conversion device includes a reactor, a single-phase inverter, and a single-phase converter which are connected in series to each other between an AC power supply and a smoothing capacitor, and performs power conversion between AC voltage of the AC power supply and DC voltage of the smoothing capacitor. The power conversion device includes a control unit which controls switch elements of the single-phase inverter and switch elements of the single-phase converter so that charging operation and discharging operation of the DC capacitor are performed in one switching cycle of the single-phase inverter and the charging amount and the discharging amount thereof are equal to each other.

Abstract: A printer has a printing mechanism for printing on roll paper; RAM storing font data for multiple languages having at least some character codes in common, and the starting address of the font data for each of the multiple languages; a communicator that receives a command specifying starting addresses and character codes; and a controller that reads font data corresponding to the character codes received by the communicator from RAM based on the starting address specified by the command, and controlling the printing mechanism to print based on the read font data.

Abstract: A first winding, a second winding, a fourth winding, and a fifth winding functioning as a transformer are wound around respective side legs of a three-leg core. Third windings functioning as a DC reactor are wound around a center leg. Winding directions of the first winding, the second winding, and the third windings are set so that magnetic fluxes generated by DC currents flowing through the respective windings merge in the same direction at the center leg, and winding directions of the fourth winding and the fifth winding are set so that magnetic fluxes generated by AC currents flowing through the respective windings cancel each other at the center leg. Thus, the transformer and the DC reactor are integrated using the three-leg core, whereby size reduction and loss reduction of the integrated magnetic component are achieved.

Abstract: A power conversion device includes a reactor, a single-phase inverter, and a single-phase converter which are connected in series to each other between an AC power supply and a smoothing capacitor, and performs power conversion between AC voltage of the AC power supply and DC voltage of the smoothing capacitor. The power conversion device includes a control unit which controls switch elements of the single-phase inverter and switch elements of the single-phase converter so that charging operation and discharging operation of the DC capacitor are performed in one switching cycle of the single-phase inverter and the charging amount and the discharging amount thereof are equal to each other.