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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
The reaction of molten Al-2.5 pct Li alloy or pure aluminum with water was studied by the exploding wire technique incorporating a crowbar switch current interruptor and an inductive energy store.
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During this process, the stiff hamulus (the pollinia stalk protruding prominently towards the lip) acted as a crowbar when it was brushed downwards by the toppled fly and lifted the pollinia out of the anther.
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Expansion of spark channels in air and possibilities of plasma crowbar in high pulsed current and magnetic field technique
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The second version employs the crowbar regime and makes it possible to form unipolar current pulses with a 190-kA amplitude and a 500-μs duration in the load circuit.
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Without the crowbar, an external overvoltage fault could act through parasitic diodes in Q1 and the interface IC to lift the main supply voltage.
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| | The operation voltage of high voltage DC power supply of plasma filled high power microwave source PASOTRON is from -70kV up to -150kV, the total current is about 300A, while the modulator(current 60A, pulse width 60~120μs) is operating suspended on the HV DC. In practice, if the strike arc occurs, there is a strong potential to destroy the microwave tube, high voltage DC power supply, modulator or/and modular circuit of the system. The protection system of the power supply, therefore, plays an important ... | | 充等离子体高功率微波源 PASOTRON的高压直流电源工作电压为 -70 k V~-1 50 k V、电流为 30 0 A左右 ,而调制器又悬浮于此高压上工作 (电流为 60 A,脉宽 60~ 1 2 0 μs)。在工作中 ,一旦出现管子打火 ,很容易打坏管子、高压直流电源、调制器或控制柜的电路模块。因此 ,其控保系统就显得尤为重要。为此采用一种专门研制的高压撬棒 ,利用简单的自触发电路 ,达到了满意的保护效果。实验证明 ,从管子打火到撬棒管作出分流仅滞后 1 50 ns,可以分流掉滤波电容中 98%以上的储能 ,工作稳定可靠 | | 文摘来源 | | Fast protection technology of crowbar base of ignitron is described in this article which apply in the high-voltage power supply on the microwave amplifier (3~30 MW/35~100 kV), the fault current can be transfer from the klystron to the ignitron which protect the tube from arcing in a few micro-seconds, according to circuit analysis for consumption of load energy and fault energy bypassed by crowbar circuit, ignitions are series-parallel connected with certain mode as well as anti-jamming trigger... | | 介绍了以高压引燃管为核心的撬棒快速保护技术,它用来满足功率直流高压电源(3~30MW/35~100kV)场合下以μs级快速转移微波放大管负载故障电流的需要。通过对负载吸能极限的必要分析和对撬棒回路旁路故障能量的具体计算,选择相应的引燃管串并联方式和抗干扰触发电路,并按核聚变装置中功率速调管的保护要求给出撬棒快速保护技术线路。实验结果表明撬棒回路在32μs内可完全转移高功率微波管的故障电流。 | | 文摘来源 | | To avoid the faults arising from hot board insertion,which may lead to the damage of the board and the backplane and even give rise to the collapse of the system in the worst-case scenario,a hot swap controller IC is developed to ensure the safe insertion and removal of a circuit board from a live backplane.To prevent over current/over voltage and surge current faults,multi protections for both the board and backplane,including a limit on the automatic starting current,a circuit breaker that triggers in the... | | 为保证系统在热插拔过程中安全工作,避免因之导致系统崩溃及系统与部件的损坏,提出一种热插拔控制芯片的设计.针对热插拔过程中可能产生的浪涌电流和过流、过压等故障现象,芯片设计中设置了多重保护功能,包括自动限制启动电流,过流时切断电路以及过压时断电,长时过压触发SCR为负载提供撬棒保护等.另外,设计了低压诊断、负载电压等检测功能.由于芯片工作中涉及较高电压和较大电流,电路采用BCD工艺(bipolar-CMOS-DMOS)实现,并对系统、电路和版图进行了优化.制得的芯片面积约为2·5mm×2·0mm,可在4·5~16·5V电压范围内正常工作,12·0V电源电压下芯片功耗约为18mW.对芯片的测试结果表明,所设计的电路功能和特性已成功实现. | | 文摘来源 | |   | | << 更多相关文摘 |
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