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VTTC精髓之二-灭弧部分
rb-sama
4年8个月前
回复于
高电压技术
内容:导致有效导通周期并不一定,而是呈现不规则变化,而这样就会导致电弧不
稳定。
,而如果实现红色波形区间导通,就可以做到跟随每个波开通而开通,并且还是零电压,零电流开通,很小规格的IGBT就可以实现对VTTC的开通和关闭,发热小,工作
稳定。
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fengyun
17年11个月前
发表于
大气科学
内容:③ 积云性层积云(Sc cug)--由积云、积雨云因上面有稳定气层而扩展或云顶下塌平衍而成的层积云。
硅光电二极管伽马射线探测器
黑体辐射
1年6个月前
发表于
核技术与核仪器
仪器仪表
动手实践: 实验报导,严肃内容: 预印本
内容:图21 闪烁体-硅光电二极管探测232Th输出脉冲为了验证该脉冲为232Th释放的伽马射线激发,设计了如下对比实验:1.在232Th放置时可观测到明显脉冲信号,待稳定工作一段时间(20min),期间可观察到大量且明显的脉冲信号
无脑线圈流,18级超便携全自动加速器~~
whd1982
10年8个月前
发表于
电磁炮
内容:按照不同加速段饶制不同参数的线圈,现在这个模块拆装非常方便,零件更换啥的,就算装好了再要换中间某级的线圈也是123的事情 弹丸使用7MM钢珠,使用牵引电磁铁和简单的结构就能实现自动上弹,实际效果不错,并能提供一个较为稳定的初速
闭环步进电机驱动
m24h
1年1个月前
回复于
极客DIY
内容:肯定不行啊 厂家手册里面都给出了非线性度 但是那都是轴对得非常准得情况 而且抖动的另一个可能是时间误差 光编几乎是立即响应 磁编里面需要采样时间 有滤波等计算 就会出现线性系统遇到容性滞后没有超前补偿的不稳定状态
[文献资料]波武器—电子系统强力毁伤.PDF
zx-16533
5年4个月前
发表于
EMP和强微波
内容:反雷达导弹作为控制对象 11.1.1 利用气动力实现控制 11.1.2 利用反作用力和力矩实现控制 11.2 反雷达导弹运动控制算法的最优化 11.3 反雷达导弹导引头器件结构和组成 11.3.1 具有稳定天线的自动导引系统功能示意图
来了!超省钱的氯酸盐电解制取
耶苏2009
3年7个月前
回复于
化学
内容:一般在3.6v电压下,电流稳定在16-22A,电解液温度上升到50-60度,这样的条件非常接近工业制备的电解池的温度,电压和电流,电解液发热大概3.6*20=72瓦,电解液始终澄清,而且在桌面离我仅50
基于DDS技术的智能超声波功率源的研制
mass_lynnxy
16年3个月前
发表于
电子技术
内容:上述研究需要超声波具有高分辨率、高稳定性、大功率、频率大范围可调等特点,为此,研制了一种基于DDS技术的超声波功率源,并已将其应用在实际的声学研究中。,本系统的主要特点有: (1)采用数字DDS技术产生波形信号,分辨率高、稳定性好、频率范围大,系统频率不会随工作时间出现漂移。,2 系统硬件实现 2.1 DDS原理及电路实现 2.1.1 008电路工作原理 DDS技术是一种用数字控制信号的相位增量技术,具有频率分辨率高、稳定性好、可灵活产生多种信号的优点。
KC901H第一次放量试生产完成,打总结
虎哥
12年5个月前
发表于
电子技术
内容:四、抓住核心,别东张西望美国人做东西有个特点:花哨功能不要,稳定可靠的功能才推出,凡是有的功能就一定很扎实。,最早901是做加法,想到什么好玩的功能就琢磨怎么加上,结果影响了效率,还不
稳定。
,有些功能虽然稳定,但是会增加使用中出错的可能,让人觉得很晕。
相变散热材料及其在电磁枪中的应用前景
三水合番
6年8个月前
发表于
电磁炮
严肃内容: 专著/论述
内容:而固-固相变材料不需要容器承装,可以直接加工成型,且性能更加
稳定。
,而且需要的试剂和设备较多,制备这类材料对电磁枪来说跑题跑得有点远……形状稳定的复合相变材料用不熔的固态材料包裹或者混合普通的固-液相变材料,可以得到类似固固相变特性的复合相变材料。
再论栅极谐振驱动的理论依据和应用范围
rb-sama
7年5个月前
发表于
高电压技术
严肃内容: 专著/论述
内容:采用上述这些方法,就能在稳定性、电路复杂度、工作带宽等方面取得平衡。,本文探讨了两种极端情况:(1)假设驱动频率完全固定,栅极谐振电路通过提供适当的增益和带宽来适应驱动频率,以便当栅极谐振电路的固有频率发生变化的时候,电路也能稳定可靠的工作;(2)假设驱动频率很大程度上是由后级
能提供低成本风电的新型风力机
1211
17年11个月前
发表于
电气电工
内容:考虑到扩散体的尺寸,需要一大型稳定的地基防止在大风载荷下和地震时倒伏。,这种布置提供了稳定的基础。
奴隶时代2.0——让动物给人类打工
玄明
15年3个月前
发表于
极客DIY
内容:比如捡垃圾——(大家可以上网搜索一下捡垃圾的狗,这样的动物确实是存在的)如果我们能设置这样一台机器,放入一个瓶子便会吐出一片狗饼干,那些流浪狗便会获得可靠稳定的工作保障了!
过氧化钾制取实验
zill25
13年8个月前
发表于
化学
内容:由于不是精密实验,无法避免实验中少量酸(我觉得即使有也会立即被中和)或水的存在,且由于是加热反应,产物又不稳定,产量难免有所损失,但应该不会一点也得不到所以特此将实验全过程分享,请大家发表议论和指责,并提出可能的猜想分析问题得出结论
设想利用压缩气体增加电磁枪初速(急盼)
baikafei
17年7个月前
回复于
电磁炮
内容:我们想通过电磁轨道,减少摩擦衰减,增加出口后的轨道稳定性。
【搬家清仓大处理】
ehco
12年6个月前
回复于
跳蚤市场
内容:360W半导体制冷模组 售价380元 库存1套(不含电源)采用工业级制片[TEC1-12709 90W]4片构成,供电12V 电流35A ,CNC铝制水循环导热块,本人加工了散热夹具和底座,性能可靠稳定制冷快速
做一个迷你功率升压电路 哈哈
老大119119119
10年6个月前
发表于
电子技术
内容:9013 或 8050 这两个三极管输出功率比9014大 电容最好选择耐操的电容 这是模拟的波形图 但是这个电路很不稳定
求一种塑料
okingkoom
13年10个月前
回复于
化学
内容:收缩小而
稳定。
常见植物药、矿物药、动物药等自然提取药物汇总
虎哥
3年10个月前
发表于
医学
内容:成分不稳定的混合物(常见例子:大部分中药)、生物制剂不属于本文范围,但过去取自自然界,当前已改为化学合成或生物工程等方法获取的药物,属于本汇总。
溴单质的制取的理论验证及制备方法 (实用便宜的实验室制法)
江都中学科创社
2个月29天前
发表于
化学
动手实践: 实验报导
内容:查阅资料可知,极其不稳定,易水解产生和,加热可促进此反应进行。,反应立即发生,现象与第一次类似,片刻后,烧瓶内壁附着大量红棕色液滴,液面温度稳定在95摄氏度,蒸馏颈温度略低于70摄氏度。
我的可调发射架方案
jrcsh
13年7个月前
回复于
喷气推进
内容:下孔盘(底座)既可采用竖直支脚方案,(三脚四脚都可)也可采用横向支脚方案,即等于加大了底盘直径来稳定.
MREO-WX II 模型火箭发动机
kc276644985
9年5个月前
发表于
喷气推进
内容: 之前有发过MREO-WX I 模型火箭发动机的帖子【XXXXXXXXXXXXXXXXXXXXXXXX/t/71517】,因为第一代机工艺复杂,安全性能也并不稳定,所以我没有写制作过程。
来看看哥都穷成什么样了
广东穷佬仔
9年4个月前
发表于
机械与工具
内容:说说配置吧:系统USB CNC CRL(买它是图便宜又简单,但是不稳定,还同时买了MACH3板,丫的不过是坏的,用不了) 驱动TB6600 1605滚珠丝杠,三轴57步进电机(两个57*76是买二手东方的
中国业余火箭执行标准
leeqingyang
12年1个月前
发表于
喷气推进
内容:难以控制压药力度,颗粒大小所带来的影响)等,不能通过设计预估到后果的燃料 Ⅲ类:属于低危险性燃料,主要包括具有成熟工艺或在制造过程中不受外界环境干扰或受干扰后对其产品影响很小,存在大量实验数据及文献佐证其安全性,稳定性的燃料,以在传统RNX燃料中添加二茂铁作为催化剂的实验,必须在制造前做好二茂铁与粘合剂,二茂铁与固化剂,二茂铁与添加剂,二茂铁与氧化剂等单相混合实验,期间需要考核混合后物的自身稳定性,高温稳定性等实验以验证在混合后不会导致剧烈的催化分解,3.此类燃料制造后,必须在试车前进行诸项稳定性实验(光稳定性,高温稳定性,撞击稳定性等),并进行燃料棒开放点燃实验,通过燃烧速度来评估药柱质地的均一性,对于在开放燃烧实验中出现剧烈燃烧变化的燃料棒,严禁进行发动机装机测试
DIY高精度电容电感表(LC METER)
novakon
10年0个月前
回复于
仪器仪表
内容:总结几条重要规律: 1 参考电容或者参考电感,一定要选非常稳定的。
《中国人民解放军全史》全10卷
苦读四年
2年0个月前
回复于
历史与考古
内容:后面是把这团发射药弄成固定大小的小颗粒,这样才能得到稳定、合格的燃烧。,在表面涂一层石墨,可以填塞它们,让发射药保持从外到内的稳定燃烧。
大学宿舍专用
cjc105808553
12年9个月前
回复于
极客DIY
内容:比较担心2个并联的HER308,作为buck电感续流的,功率余量不大,应该换mur几几的,to 220的以前做的模拟控制的,分段功率上升不好,零件也多,这次改成数控的,也没有uc3843控制的环路震荡问题,稳定性更好
模型火箭技术大全
大仙
16年4个月前
发表于
喷气推进
内容:也探讨模型火箭的稳定,风压中心与重心的关系,模型火箭的空气动力学。,重量公式 火箭的重心 火箭的重心 空氣動力學空气动力学 模型火箭的空氣動力學 模型火箭的空气动力学 空氣作用力 空气作用力 求出風壓中心 求出风压中心 風向雞效應 风向鸡效应 模型火箭的穩定 模型火箭的稳定
个人对于重心、压心确定的浅陋理解
蜂起4223
2年3个月前
发表于
喷气推进
严肃内容: 专著/论述
内容:火箭重心、压心的确定王舸帆[这是本人对于重心、压心的浅陋理解,文章中可能存在一些错误,如有发现还请大佬们指正] 在进行火箭稳定性调节的时候,常常涉及到两个关键词:重心和压心。,压心会随迎角改变而改变,而在此篇中仅考虑迎角为零的情况,因为本文目的重在火箭的平衡,所以要按火箭发动机工作阶段稳定向上飞行的情况考虑。
常压混酸法蒸馏发烟硝酸实验
zzdawp
11年2个月前
发表于
化学
内容:苦逼的说蒸馏出50ml烟硝的时候我妈来了个电话,吓了我一跳,把冷凝管碰碎了T_T...照片里就没冷凝管了) 接好仪器后,开始蒸馏 纯净的硝酸沸点应该是83℃ + -,于是首先尝试83℃蒸馏,等油温稳定后放入蒸馏烧瓶
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