Abstract: In a power grid stabilization system, a second energy storage system has a larger energy storage capacity than a first energy storage system. A bidirectional AC/DC converter is connected between an AC power grid and a pair of input and output terminals of the first energy storage system. A first bidirectional DC/DC converter is connected between the pair of input and output terminals of the first energy storage system and a pair of input and output terminals of the second energy storage system.

Abstract: An electric power control system includes a plurality of power converters connected in parallel. Each power converter, among the plurality of power converters, converts a direct-current power of an electricity storage device connected to the power converter into an alternating-current power, and outputs the alternating-current power to the power system. The electric power control system further includes: a power generator simulation unit to simulate characteristics of the synchronous generator based on an aggregate active power to generate a phase of the alternating-current voltage; a signal generation unit to generate a control signal for the power converter, based on the phase of the alternating-current voltage. The power generator simulation unit generates a first angular frequency based on a first difference between the aggregate active power and a target value for the aggregate active power, and generates, based on the first angular frequency, the phase of the alternating-current voltage.

Abstract: A power storage apparatus of one embodiment includes a storage bank including a plurality of power storage elements connected to each other; and one or plurality of first cells. The storage bank and the one or plurality of first cells are connected in series to each other. Each first cell includes a pair of input/output nodes, a bridge circuit including at least two semiconductor switching elements, and a power storage element connected to the pair of input/output nodes via the bridge circuit. A storage capacity of the power storage element of each first cell is smaller than a storage capacity of the storage bank.

Abstract: A sun shade apparatus of the present invention has a curtain capable of shielding a window portion of a door. The curtain can be stretched between a shielding state and an open state on the window portion. The apparatus has a motor, a cable provided so as to be capable of being forced out or drawn in by the operation of the motor, and a connector connecting the cable and the curtain to each other. The curtain is stretched with the operation for forcing out or drawing in the cable. The connector has a connection release mechanism that releases the cable and the curtain from the state of being connected when a load equal to or higher than a predetermined value is applied against the operation for forcing out or drawing in the cable.

Abstract: A sun shade apparatus of the present invention having a cable provided so as to be capable of being forced out or drawn in, a connector connecting the cable and a curtain to each other, a guide rail provided on a window portion, and a slide member attached to the curtain and slidable on the guide rail. The curtain is stretched with the operation for forcing out or drawing in the cable. The guide rail has a bracket for fixing the guide rail on a vehicle door panel. One end of the bracket is engaged with a flange portion of the door panel, while the other end is fixed on the door panel by a fixing member.

Abstract: A sun shade apparatus of the present invention has a pair of cables provided so as to be movable in outer tubes. A curtain has its opposite ends connected to ends of each cable and is stretched with the movement of the cables. At least one of the outer tubes is divided into a first tube and a second tube between which a length adjusting mechanism is interposed. The length adjusting mechanism consists of a first connecting member having a female thread formed therein, and a second connecting member having a male thread formed on its outer surface and having a cylindrical portion which is screwed into the female thread of the first connecting member. A fastening nut member which abuts against an end surface of the first connecting member is provided on the cylindrical portion.

Abstract: A sunshade device is configured to block light coming through a front window of a vehicle. The front window of the vehicle extends to an area above at least one of a driver seat and a front passenger seat of the vehicle. The front window configures a portion of a front side of a ceiling of the vehicle. A light-blocking member is disposed below the front window. The light-blocking member includes a front side member and a rear side member. The front side member is movable in a front-and-rear direction separately from the rear side member.

Abstract: A sun shade apparatus of the present invention has a pair of cables provided so as to be movable in outer tubes. A curtain has its opposite ends connected to ends of each cable and is stretched with the movement of the cables. At least one of the outer tubes is divided into a first tube and a second tube between which a length adjusting mechanism is interposed. The length adjusting mechanism consists of a first connecting member having a female thread formed therein, and a second connecting member having a male thread formed on its outer surface and having a cylindrical portion which is screwed into the female thread of the first connecting member. A fastening nut member which abuts against an end surface of the first connecting member is provided on the cylindrical portion.

Abstract: A sun shade apparatus of the present invention having a cable provided so as to be capable of being forced out or drawn in, a connector connecting the cable and a curtain to each other, a guide rail provided on a window portion, and a slide member attached to the curtain and slidable on the guide rail. The curtain is stretched with the operation for forcing out or drawing in the cable. The guide rail has a bracket for fixing the guide rail on a vehicle door panel. One end of the bracket is engaged with a flange portion of the door panel, while the other end is fixed on the door panel by a fixing member.

Abstract: A sun shade apparatus of the present invention has a curtain capable of shielding a window portion of a door. The curtain can be stretched between a shielding state and an open state on the window portion. The apparatus has a motor, a cable provided so as to be capable of being forced out or drawn in by the operation of the motor, and a connector connecting the cable and the curtain to each other. The curtain is stretched with the operation for forcing out or drawing in the cable. The connector has a connection release mechanism releases the cable and the curtain from the state of being connected when a load equal to or higher than a predetermined value is applied against the operation for forcing out or drawing in the cable.

Abstract: An elevator control apparatus includes a converter, an inverter, a controller for controlling a motor based on AC power having a variable voltage and a variable frequency supplied from the inverter and operating an elevator; a power storage unit for storing DC power; a charge/discharge control circuit that issues a drive signal such that discharge from the power storage unit increases within a range of power that can be discharged when an elevator is driven immediately following completion of uniform charging; and a charge/discharge circuit for charging the power storage unit in accordance with the drive signal. This arrangement permits quick discharging while effectively using discharge electric power until a state of charge is reached wherein regenerative electric power can be used for charging.

Abstract: An elevator control apparatus includes a converter, an inverter, a controller for controlling a motor based on AC power having a variable voltage and a variable frequency supplied from the inverter and operating an elevator; a power storage unit for storing DC power; a charge/discharge control circuit that issues a drive signal such that discharge from the power storage unit increases within a range of power that can be discharged when an elevator is driven immediately following completion of uniform charging; and a charge/discharge circuit for starting uniform charging of the power storage unit in accordance with the drive signal. This arrangement permits quick discharging while effectively using discharge electric power until a state of charge is reached wherein regenerative electric power can be used for charging.

Abstract: An elevator control apparatus solves a major problem with a conventional elevator control apparatus in that a state of charge of a battery is not always maintained at 100% because of the need for securing an allowance for charging regenerative electric power, causing generation of an inert material in the battery with a resultant decrease in an apparent charging capacity of the battery and a shortened life of the battery.

Abstract: An elevator control apparatus solves a major problem with a conventional elevator control apparatus in that a state of charge of a battery is not always maintained at 100% because of the need for securing an allowance for charging regenerative electric power, causing generation of an inert material in the battery with a resultant decrease in an apparent charging capacity of the battery and a shortened life of the battery.

Abstract: An elevator control apparatus includes a converter, an inverter, a controller for controlling a motor based on AC power having a variable voltage and a variable frequency supplied from the inverter and operating an elevator; a power storage unit for storing DC power; a charge/discharge control circuit that issues a drive signal such that discharge from the power storage unit increases within a range of power that can be discharged when an elevator is driven immediately following completion of uniform charging; and a charge/discharge circuit for discharging the power storage unit in accordance with the drive signal. This arrangement permits quick discharging while effectively using discharge electric power until a state of charge is reached wherein regenerative electric power can be used for charging.

Abstract: An elevator control apparatus includes a converter; an inverter; a controller for controlling a motor based on the AC power having a variable voltage and a variable frequency supplied from the inverter and operating an elevator; a power storage unit for storing the DC power; a thermistor for detecting temperature of the power storage unit; a charge/discharge control circuit for controlling a charging and discharging of the power storage unit based on the detected temperature and issuing a drive signal; and a charge/discharge circuit for charging and discharging the power storage unit based on the drive signal. The elevator control apparatus estimates a charging and discharging capability of the power storage unit and protecting the power storage unit, restraining sudden deterioration of the power storage unit.

Abstract: An elevator control apparatus solves a problem in that charging and discharging characteristics of a battery used for a power storage unit changes with temperatures, and charging all regenerative electric power of the elevator may cause a sudden rise in the temperature of the battery especially at a low temperature, and a gas may be generated in the battery, leading to significant deterioration of the battery. The elevator control apparatus includes: a converter; an inverter; a controller for controlling a motor based on the AC power of a variable voltage and a variable frequency supplied from the inverter so as to operate an elevator; a power storage unit for storing the DC power; a thermistor for detecting a temperature of the power storage unit; a charge/discharge control circuit for controlling a charging and discharging electric energy based on the detected temperature and issuing a drive signal; and a charge/discharge circuit for charging and discharging the power storage unit based on the drive signal.

Abstract: An elevator control apparatus solves a major problem with a conventional elevator control apparatus in that a state of charge of a battery is not always maintained at 100% because of the need for securing an allowance for charging regenerative electric power, causing generation of an inert material in the battery with a resultant decrease in an apparent charging capacity of the battery and a shortened life of the battery.

Abstract: A camera provided with an aperture controllable shutter capable of determining exposure by varying aperture movement, and a photographic lens capable of varying focal length. In accordance with the focal length of the photographic lens, an aperture size or an aperture characteristic of the aperture controllable shutter is determined. A diaphragm of the aperture controllable shutter is driven based on the determined aperture size, aperture characteristic and object brightness.

Abstract: A camera system is capable of operating in a number of different photographic modes and includes a display system which provides information relevant to each of the modes. The camera system also includes an automatic film rewinding mechanism that has two modes of operation. In a first, automatic, mode, the tensioning of the film during winding is detected to indicate the end of the roll of film. Upon such detection, the film is automatically and fully rewound into the film cartridge. In a second, user selectable, mode a signal is manually provided by the user to initiate film rewinding. Rewinding of the film is stopped just prior to the time the end of the film enters the cartridge, so that a portion of the film leader remains extended outside of the cartridge.