Abstract: To reduce a total power amount required to drive an elevator by a commercial power supply during a peak power-consumption time period, for instance, afternoon in summer time, a control apparatus for this elevator is arranged by employing: a converter for rectifying AC electric power to be converted into DC electric power; and inverter for inverting the DC electric power into AC electric power having a variable voltage and a variable frequency; a motor driven by said AC electric power having the variable voltage and the variable frequency so as to operate an elevator; a power storage apparatus for charging thereinto electric power; and a power controller for using both the power storage apparatus and the commercial power supply so as to supply the electric power to the inverter, and for controlling at least any one of the power storage apparatus and the commercial power supply in order to supply electric power which is required for the inverter.

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: A controller of an elevator for stably controlling regenerated power by using a cheap secondary battery of a low capacity without damaging energy saving effects obtained by charging.

Abstract: An elevator control apparatus includes: a converter for rectifying AC power into DC power; an inverter for converting the DC power into AC power having a variable voltage and a variable frequency; a controller for controlling a motor based on the AC power having the variable voltage and the variable frequency, operating an elevator; a power storage unit for storing the DC power; a required power computing circuit for computing required power of the elevator based on a speed command of the controller; a charge/discharge control circuit for issuing a drive signal for changing charge current, supplied to the power storage unit, based on regenerative electric power so as to charge the power storage unit with the regenerative electric power if the required power of the elevator is negative, meaning that the regenerative electric power is available; and a charge/discharge circuit for charging the power storage unit with the regenerative electric power in accordance with the drive signal.

Abstract: An elevator controller for stably controlling charging and discharging of a power accumulating device by using a cheap secondary battery having a low capacity, without damaging energy saving effects obtained by charging.

Abstract: A controller of an elevator for smooth speed control, using a cheap power accumulating device having a low capacity, even during a power failure.

Abstract: A controller of an elevator for reducing the number of execution times of uniform charging of a power accumulating device and having higher energy saving effects. The controller has a converter, an inverter, a power accumulating device arranged between DC buses, a charging-discharging control circuit for controlling charging and discharging operations of the power accumulating device, and a charging-discharging state measuring device for measuring at least one of temperature, charging and discharging currents, and charging and discharging voltages of the power accumulating device. The charging-discharging control circuit sets the execution of uniform charging of the power accumulating device on the basis of an output of the charging-discharging state measuring device, and executes only the required uniform charging. Thus, an elevator with the power accumulating device having larger energy saving effects is constructed.

Abstract: There is provided an optical transmission system that can identify any transmitting stations generating optical beats found within the transmission band being used for optical signals so that any degradation in the quality of the signals being transmitted and adversely affected by the optical beats may be eliminated. The light sources of the transmitting stations giving rise to the optical beats generated in the detector as a result of the differences of the wavelengths of the optical signals coming from the light sources of the transmitting stations and adversely affecting the transmission band being used for the electric signals originating the modulated optical signals are identified by changing the state of polarization of light of the optical signals coming from the light sources of the plurality of transmitting stations.

Abstract: A thermal fatigue prevention apparatus for a high temperature pump which includes an impeller in a high temperature pump casing, a pump shaft rotatably supported by a journal of a submerged bearing and projecting from a shaft through hole of a casing cover, and a shaft sealing device. The shaft sealing device is enclosed with a shaft sealing chamber which is supplied with a low temperature seal purging liquid, and a part of the seal purging liquid flows into the pump casing through the shaft through hole. A heater is provided within the high temperature pump, the heater raises the temperature of the low temperature seal purging liquid before the seal purging liquid flows into the pump casing by using the high temperature pumping liquid.

Abstract: In order to enable formation of a smooth and dense oxide superconducting film with no clear appearance of grain boundaries in a fine structure even at a high film forming rate, a laser ablation method is employed to apply a laser beam 2 to a target 1 containing components of an oxide superconductive material and deposit particles, which are thus scattered from the target 1, on a substrate 3, while gaseous oxygen is supplied from a gaseous oxygen inlet 7 toward laser plasma 6, which is generated by the application of the laser beam 2.

Abstract: Power generation with a gas turbine using a gasified fuel of inferior quality is accomplished with high efficiency by a method which comprises bleeding part of highly compressed air emanating from an air compressor driven by a gas turbine and introducing the part of highly compressed air into an oxygen adsorbing tower containing an oxygen adsorbent thereby causing the oxygen from the highly compressed air to be adsorbed by the oxygen adsorbent and, at the same time, allowing the nitrogen gas from the highly compressed air to flow in a highly compressed state through the oxygen adsorbing tower, desorbing the adsorbed oxygen from the oxygen adsorbent under a vacuum, compressing the oxygen gas resulting from the desorption and gasifying a fuel of inferior quality with the compressed oxygen gas as an oxidizing agent, effecting combustion of the gasified fuel of inferior quality with the remainder of the compressed air produced by air compressor, mixing the gas arising from the combustion with the highly compresse

Abstract: A training simulator for selectively executing one of training items of simulation bases to be executed by the operation on a trainer console requesting the responsive operation on a trainee console of storing a current time and information of current training status in response to reception of a first command from the trainer console, and of reviewing the executed training item in accordance with the stored current time and information in response to reception of a second command from the trainer console.

Abstract: A training simulator for selecting one of the training items of simulation bases to be executed by the operation on a trainer console, requesting responsive operation on a trainee console, of reviewing the training from the beginning thereof when a first command to review the executed training item is given through the operation of the trainer console, and of executing another selected training item upon receiving a second command to convert the training item during the review operation of the preceding training item.