摘要:
A power conversion apparatus includes serially connected arms U and X, serially connected arms V and Y, serially connected arms W and Z, and a capacitor, the pairs of serially connected arms and the capacitor all connected in parallel to one another. The input-side arms U and X and the output-side arms W and Z are subjected to PWM control so that the arms W and Z are controlled to have a voltage that is lower than that of the arms U and X, thereby providing a step down operation. A step up operation also can be provided by an opposite relation in which the arms W and Z are controlled to have a voltage that is higher than that of the arms U and X, thereby to expand the range within which the output voltage is controlled with the effect of reducing distortion.
摘要:
A power conversion apparatus includes serially connected arms U and X, serially connected arms V and Y, serially connected arms W and Z, and a capacitor, the pairs of serially connected arms and the capacitor all connected in parallel to one another. The input-side arms U and X and the output-side arms W and Z are subjected to PWM control so that the arms W and Z are controlled to have a voltage that is lower than that of the arms U and X, thereby providing a step down operation. A step up operation also can be provided by an opposite relation in which the arms W and Z are controlled to have a voltage that is higher than that of the arms U and X, thereby to expand the range within which the output voltage is controlled with the effect of reducing distortion.
摘要:
An uninterruptible power supply includes a first converter connected in parallel with an AC power system, a second converter series-connected to the first converter, and an energy accumulation device connected between the first and second converters. A control apparatus controls the first converter and the second converter so that when the voltage of the AC power system is within a first voltage range, the second converter switches at a frequency of the AC power system and the system voltage is output via the second converter. When the system voltage is within a second voltage range, outside the first voltage range, the second converter is used to compensate the voltage of the AC power system to output a reference voltage value, and when the system voltage is outside the second voltage range, the energy accumulation means and the second converter are used to generate and output the reference voltage value.
摘要:
A power-converting apparatus features the ability to achieve initial charging of a smoothing capacitor generating a minimum rush current by obviating the need for additional series connections in a battery, and also obviating the need for an initial charging circuit consisting of a charging resistor and switch in the capacitor. The power-converting apparatus includes a separating device that electrically separates an AC power-supply source from the input devices of the power-converting apparatus, an AC/AC converting circuit that initially rectifies AC current from an AC power-supply source and then causes a capacitor to smooth the rectified AC current, thereby converting the rectified AC current into DC current before again converting the DC current into AC current, a battery; and a DC/DC converting circuit that enables a capacitor to be charged with DC voltage delivered from the battery, and conversely enables the battery to be charged with a DC voltage delivered from the above capacitor bilaterally or unilaterally.
摘要翻译:功率转换装置具有通过消除对电池中的附加串联连接的需要来实现产生最小冲击电流的平滑电容器的初始充电的能力,并且还避免了对由充电电阻器和开关构成的初始充电电路的需要 在电容器中。 电力转换装置包括:分离装置,其将交流电源与电力转换装置的输入装置进行电气分离; AC / AC转换电路,其最初对来自交流电源的AC电流进行整流,然后使 电容器,用于平滑整流的交流电流,从而将整流的AC电流转换成直流电流,然后再将DC电流转换成AC电流;电池; 以及DC / DC转换电路,其使电容器能够从电池输送的DC电压充电,并且相反地使电池能够从双向或单向地从上述电容器传送的DC电压充电。
摘要:
An uninterruptible power supply system prevents an output voltage from dropping due to an operation delay of a relay for isolating an alternating-current power source side and avoids an unexpected current flowing between the alternating-current power source side and the uninterruptible power supply system side. When short circuit occurs, a parallel converter connected in parallel to input terminals connected to an alternating-current power source is made to operate so that the output voltage thereof becomes “0” or the input voltage Vin and a series inverter connected in series between an input relay and one of output terminals is made to carry out a compensating operation with a smoothing capacitor taken as a power source so that a value of an applied voltage to the output terminals becomes an output voltage command value Vout*. This makes the output voltage of the parallel converter become “0” or Vin to produce no electric potential difference between the alternating-current power source side and the output side of the parallel converter. Therefore, no current flows between the alternating-current power source side and the parallel converter, and a value of an applied voltage to the output terminals is to be continuously maintained at the output voltage command value Vout* by the series inverter.
摘要:
A power-converting apparatus features the ability to achieve initial charging of a smoothing capacitor generating a minimum rush current by obviating the need for additional series connections in a battery, and also obviating the need for an initial charging circuit consisting of a charging resistor and switch in the capacitor. The power-converting apparatus includes a separating device that electrically separates an AC power-supply source from the input devices of the power-converting apparatus, an AC/AC converting circuit that initially rectifies AC current from an AC power-supply source and then causes a capacitor to smooth the rectified AC current, thereby converting the rectified AC current into DC current before again converting the DC current into AC current, a battery; and a DC/DC converting circuit that enables a capacitor to be charged with DC voltage delivered from the battery, and conversely enables the battery to be charged with a DC voltage delivered from the above capacitor bilaterally or unilaterally.
摘要翻译:功率转换装置具有通过消除对电池中的附加串联连接的需要来实现产生最小冲击电流的平滑电容器的初始充电的能力,并且还避免了对由充电电阻器和开关构成的初始充电电路的需要 在电容器中。 电力转换装置包括:分离装置,其将交流电源与电力转换装置的输入装置进行电气分离; AC / AC转换电路,其最初对来自交流电源的AC电流进行整流,然后使 电容器,用于平滑整流的交流电流,从而将整流的AC电流转换成直流电流,然后再将DC电流转换成AC电流;电池; 以及DC / DC转换电路,其使电容器能够从电池输送的DC电压充电,并且相反地使电池能够从双向或单向地从上述电容器传送的DC电压充电。
摘要:
The present invention provides a composite optical element including a resin layer that is less susceptible to yellowing and has small cure shrinkage during formation. The present invention is a composite optical element including a resin layer obtained by polymerizing a resin composition containing a (meth)acrylate compound of a saturated aliphatic epoxy compound, a multifunctional isocyanurate compound, and a photopolymerization initiator.
摘要:
This invention relates to a composition characterized by containing, as essential components, deacetylated chitin and/or a deacetylated chitin derivative, and glyoxylic acid; a solution-containing gel formed from the composition; a water-insoluble chitosan coating; and a material obtained by treating a base material with the composition. According to the present invention, it is possible to provide a chitosan composition, which in a “one-pack” form, has a pot life. Even when dried at room temperature after coating or impregnation of a base material, the chitosan coating can be water-insolubilized with reduced yellowing.
摘要:
A water-based slurry composition contains (1) a water-based medium containing at least water as a polar solvent, (2) at least one polymer selected from cellulose derivatives, alginic acid derivatives, starch derivatives, chitin derivatives, chitosan derivatives, polyallylamine and polyvinylamine, (3) a hydrophobic filler, and (4) a polybasic acid or a derivative thereof. The composition has a water content of 30 mass % or higher. An electrode plate for an electricity storage device, and the electricity storage device are also disclosed.
摘要:
The present invention relates to a method for detecting an antibody against a small protein encoded by the intermediate stage transcript of HHV-6 (SITH-1) in a biological sample. The method of the present invention includes the following steps: 1) providing the SITH-1 protein; 2) binding the SITH-1 protein provided in step 1) to a carrier; and 3) contacting the biological sample with the SITH-1 protein-bound carrier prepared in step 2) to detect the SITH-1 protein antibody.