摘要:
In a first-order complex band-pass filter, multiplexers are alternately switched over between time intervals of phases A and B, where the multiplexers includes two multiplexers provided at input and output stages, and a multiplexer provided in a feedback circuit of each of first-order filters and being switching over whether to invert a sign of a feedback signal. Then in a circuit part sandwiched between the multiplexers, a processing performed by an I circuit part and a processing performed by a Q circuit part are alternately switched over so that a sign of a signal inputted to an adder is inverted.
摘要:
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.
摘要:
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.
摘要:
A controller of an elevator for smooth speed control, using a cheap power accumulating device having a low capacity, even during a power failure. 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 of the power accumulating device, a power failure detector, a current measuring instrument and a voltage measuring instrument for respectively detecting an output current and an output voltage of the inverter, a car load measuring instrument, an encoder, and a speed control circuit for controlling operation of the inverter, which has a table with required power set according to speed and car load, and calculates the power required from the table on the basis of a measured car load and a detected speed during a power failure, and also calculates speed commands for controlling the speed of the elevator within a range of discharging ability of the power accumulating device on the basis of a comparison of the output power of the inverter, the power required, and the discharging ability.
摘要:
A fibrous sheet having the shape memory property which comprises a sheet made of natural fiber and/or synthetic fiber and a layer formed by applying a powder of shape memory polymer; and a method of imparting the shape memory property which comprises applying a powder of shape memory polymer to a desired part of a product of a sheet made of natural fiber and/or synthetic fiber by the aid of a resin adhesive.
摘要:
An anti-after-burning system in an internal combustion engine provided with a governor device, in which a governor spring is stretched between a governor lever and a governor control lever and the governor lever is connected to a carburetor throttle lever, and a stoppage device for stopping an engine by grounding a primary wire of an ignition circuit, is improved. The governor control lever is provided with a grounding section for grounding the primary wire of the ignition circuit as a result of the rotation of the lever to an engine stoppage position. The governor lever and one end of the governor spring are connected so as to be relatively rotatable and so as to have a freedom of movement with respect to the axial direction of the governor spring. Furthermore, the governor spring is constructed in such manner that when the governor control lever is at the stoppage position for grounding the primary wire of the ignition circuit, a coiled portion of the governor spring butts against the governor lever to constrain rotation of the governor lever in the direction which would cause the carburetor throttle valve to open.
摘要:
A web in the form of a thermal transfer carbon ribbon has a lead tape adhered to the leading end of the web, that is to the outermost end portion of the web wound upon a core. The lead tape includes a base and a pressure-sensitive adhesive layer backing the base. The lead tape is adhered to the surface of the outermost circumference of the carbon ribbon and the end of the lead tape tape is coextensive with the end of the carbon ribbon, which strengthens the then leading end of the carbon ribbon. In forming this carbon ribbon and lead tape combination, the carbon ribbon is let off from a thickly rolled raw ribbon and is taken up on a core. The lead tape is applied to the running surface of the carbon ribbon on the raw roll at the location immediately before the carbon ribbon has been fully taken up on the core. Then the carbon ribbon is cut at the trailing end of the lead tape when the carbon ribbon has been substantially fully taken up to make the ends of the carbon ribbon and of the lead tape coextensive.
摘要:
In a photographic device, there are provided (a) a means for measuring luminous intensity distribution on an object and (b) a screen means for controlling gradation of an image to be formed on a photosensitive material in accordance with the luminous intensity distribution and/or maximum/minimum luminous intensity difference of the object measured by the means (a).
摘要:
There is offered a signal processing device of touch panel using an electrostatic capacity, which realizes improvement in noise tolerance and linear detection. An excitation pad, a first touch pad and a second touch pad are disposed on a substrate in a way that the excitation pad is interposed between the first and second touch pads. On the other hand, an alternating current power supply that provides the excitation pad with an alternating voltage through a wiring is provided on a sensor IC side of the signal processing device of touch panel. Also, there is provided an electric charge amplifier. The first touch pad is connected to a non-inverting input terminal (+) of the electric charge amplifier through an wiring, while the second touch pad is connected to an inverting input terminal (−) of the electric charge amplifier through a wiring.
摘要:
To minimize the amount of air that may enter the damper chamber in a normally closed solenoid valve to stably maintain the damper capacity, the normally closed solenoid valve has a valve housing and a movable element. A cylinder having an open end is formed in one of the valve housing and the movable element. The cylinder has an inner diameter smaller than the outer diameter of a trunk of the movable element. A piston provided on the other of the valve chamber and the movable element is movable relative to the cylinder as the movable member moves. The piston is inserted into the cylinder through its open end to define a damper chamber between the piston and the cylinder. A restricted passage is formed between the damper chamber and the valve chamber through which hydraulic fluid can be moved between the valve chamber and the damper chamber.