UPS是英文Uninterruptible Power System的缩写,意为不间断电源系统。在广播电视安全播出工作中,作为一种常见的辅助设备,有着不可替代的重要作用。特别是针对信号源系统,当交流供电出现异常中断时,UPS系统能够通过蓄电池由逆变电路供电...UPS是英文Uninterruptible Power System的缩写,意为不间断电源系统。在广播电视安全播出工作中,作为一种常见的辅助设备,有着不可替代的重要作用。特别是针对信号源系统,当交流供电出现异常中断时,UPS系统能够通过蓄电池由逆变电路供电,保证信号不间断、高质量传送,切实满足广播电视安全播出工作中的零停播要求。本文通过综合分析系统线路,总结日常检修经验,对后备式UPS蓄电池的充电电路进行全面论述,分析归纳电路检修过程。由于本人能力有限,不妥之处敬请大家批评指正。展开更多
With the development of devices for high performance, the circuit technologies have been also studied. One of the main streams concerns a soft switching technology to mitigate switching stress, leading to the reductio...With the development of devices for high performance, the circuit technologies have been also studied. One of the main streams concerns a soft switching technology to mitigate switching stress, leading to the reduction in switching losses or electro-magnetic noise. On the other hand, as a characterized orthodox technology＇, the existing chopper circuit is used for the electric vehicles, etc.. Such technologies have a tendency to go out of vogue as power supplies for such vehicles. However, as a boost chopper for the battery charger for an electric vehicle, those technologies become a main stream, where a bilateral function is required. With the foregoing in mind, the authors have devised and analyzed the bilateral chopper using the soft-switch technology, which could be applied to a battery charger for an electric vehicle or similar.展开更多
The dependence of the organic solar cells parameters, e.g., the shirt circuit current Isc, open circuit voltage Vo,., the fill factor FF and the efficiency eta on temperature is investigated. By expressing the differe...The dependence of the organic solar cells parameters, e.g., the shirt circuit current Isc, open circuit voltage Vo,., the fill factor FF and the efficiency eta on temperature is investigated. By expressing the different equations which link the parameters with temperature, it is observed that the short circuit current Isc increases so monotonous with temperature and then saturates to a maximum value before decreasing at high temperatures. The open circuit voltage V∝ decreases linearly with the increasing of the temperature. The fill factor FF and the efficiency eta which are directly related with short circuit current Isc and the open circuit voltage V∝ follow their variations.展开更多
文摘UPS是英文Uninterruptible Power System的缩写,意为不间断电源系统。在广播电视安全播出工作中,作为一种常见的辅助设备,有着不可替代的重要作用。特别是针对信号源系统,当交流供电出现异常中断时,UPS系统能够通过蓄电池由逆变电路供电,保证信号不间断、高质量传送,切实满足广播电视安全播出工作中的零停播要求。本文通过综合分析系统线路,总结日常检修经验,对后备式UPS蓄电池的充电电路进行全面论述,分析归纳电路检修过程。由于本人能力有限,不妥之处敬请大家批评指正。
文摘With the development of devices for high performance, the circuit technologies have been also studied. One of the main streams concerns a soft switching technology to mitigate switching stress, leading to the reduction in switching losses or electro-magnetic noise. On the other hand, as a characterized orthodox technology＇, the existing chopper circuit is used for the electric vehicles, etc.. Such technologies have a tendency to go out of vogue as power supplies for such vehicles. However, as a boost chopper for the battery charger for an electric vehicle, those technologies become a main stream, where a bilateral function is required. With the foregoing in mind, the authors have devised and analyzed the bilateral chopper using the soft-switch technology, which could be applied to a battery charger for an electric vehicle or similar.
文摘The dependence of the organic solar cells parameters, e.g., the shirt circuit current Isc, open circuit voltage Vo,., the fill factor FF and the efficiency eta on temperature is investigated. By expressing the different equations which link the parameters with temperature, it is observed that the short circuit current Isc increases so monotonous with temperature and then saturates to a maximum value before decreasing at high temperatures. The open circuit voltage V∝ decreases linearly with the increasing of the temperature. The fill factor FF and the efficiency eta which are directly related with short circuit current Isc and the open circuit voltage V∝ follow their variations.
