摘要:
A baseband signal is used for transmission between a roadside antenna apparatus and a roadside apparatus. A setting tool, such as a personal computer, is connected to the roadside apparatus so that adjustment/setting of the roadside antenna apparatus may be remotely performed with the setting tool. The baseband signal and the remote control signal are compressed and transmitted on an ordinary transmission signal.
摘要:
There are provided with a ball given quantity supply apparatus for supplying a given quantity of balls to an apparatus using a given quantity of balls such as a bearing, a ball screw and a linear guide, and a method and apparatus for assembling a ball screw apparatus for use in a feed mechanism employed in various machines.
摘要:
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.
摘要:
An apparatus for controlling an elevator which has a high energy-saving effect based on charging while using a low-capacity and low-priced secondary battery. The apparatus has a converter for converting an alternating current from an ac power supply into a dc power by rectifying the alternating current, an inverter for driving an electric motor by converting the dc power from the converter into variable-voltage variable-frequency ac power, the motor being driven for the operation of the elevator, and a power accumulator connected to a dc bus between the converter and the inverter. The power accumulator accumulates dc power from the dc bus during regenerative operation of the elevator, and supplies the accumulated dc power to the dc bus during power-drive operation of the elevator. The apparatus also has charge/discharge control circuit for controlling charging/discharging of the power accumulator from or to the direct current bus, and a measuring device for measuring at least one of the temperature, current and voltage of the power accumulator. The charge/discharge control circuit adjusts the maximum value of the current for charging/discharging of the power accumulator according to an output from the measuring device.
摘要:
An elevator control apparatus includes a power storage unit for storing the DC power; a charge/discharge control circuit that controls a state of charge of the power storage unit, outputs a drive signal to charge the power storage unit with the DC power during a halt of the elevator based on operational information regarding the elevator received from the controller, and outputs a stop signal to stop charging when a voltage of the power storage unit reaches a preset voltage; and a charge/discharge circuit for starting charging the power storage unit with the DC power in response to the drive signal, and stopping the charging in response to the stop signal. This arrangement ensures landing of the elevator in case of a power failure, eliminates a peak in power consumption, and permits energy saving by effectively using power produced in a regenerative mode of the elevator.
摘要:
An elevator control device includes: a convertor which rectifies a.c. power and converts the a.c. power into d.c. power; an inverter which converts the d.c. power into a.c. power having a variable voltage and a variable frequency; an electric motor which is driven by the a. c. power having a variable voltage and a variable frequency to operate an elevator; a power storing unit which is charged with electric power; a required-power arithmetically operating circuit which calculates power required by the elevator, which is an electric power required for the operation of the elevator or an electric power caused by the operation of the elevator; and a charging/discharging control circuit which controls charging and discharging of the power storing unit based on the power required by the elevator.
摘要:
A power converter apparatus comprising an initial voltage-setting circuit by which a signal for generating a predetermined voltage on the alternating (A.C.) side of a converter is applied to a current negative-feedback circuit at the start of the converter.
摘要:
The inventory management system comprises a central control unit, a number of parts terminal units deposed at each parts container, and some guide terminal units arranged at each parts container shelf. A worker goes to a parts container in accordance with the guidance on the guide terminal units, performs parts storing, parts collecting or stocktaking jobs in accordance with a job display and parts quantity display on the parts terminal unit and can also correct a displayed parts quantity if the quantity displayed is not correct.
摘要:
A control apparatus for an A.C. elevator comprises resistances connected between an A.C. power source and a converter, a detection device to detect the build-up rate of the charged voltage of a smoothing capacitor, and control means to generate a signal for closing a contact interposed between the A.C. power source and the converter, when the output of the detection device is not greater than a predetermined value. The detection and control devices are preferably provided by a microcomputer.