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这是示波器开枪，其中显示当前读的是不同的，可以粉碎之一，目前规模是4250年的A /理学系和时基20美/理学系。 Peak current around 13 kA. 峰值电流约13家。 The surprising thing is that the first current reversal is GREATER than the initial pulse. 令人称奇的是，第一次电流反转大于初始的脉搏。 This seems most likely due to inductance (L) reduction by a degree of interturn shorting. Note that the magnetic forces act to compress axially (lengthways) and expand radially (outwards). The consequences of this are that this should NOT recur if I prevent interturn shorting or movement. 这似乎是最可能的原因是电感（ 1 ）减少某种程度的股间短路。注意到，该磁部队法，以压缩轴向（纵向） ，并扩大呈辐射状（向外） 。后果，这是由于这不应该再发生，如果我阻止间短路或运动。
Version 3 used an aluminium disc in lieu of a coin. I setup the whole 5 turn coil and coin in a block of ice (made from relatively non- conductive deionised water). 第3版系统采用了铝制圆盘代替硬币，我的设置，整个五转线圈和钱币在一大块冰（从相对非导电去离子水） 。 The block of ice was shattered into small pieces but the coil was still enlarged and burnt out. The "coin" was shrunk by perhaps 0.5 mm with the blue circle being the tracing before and the red after. So no real success yet. I am told that a Japanese 1 yen coin is suitable for crushing being light and aluminium. 该座的冰山破碎成小块，但线圈仍在扩大，并烧毁了。 "钱币"缩水也许0.5毫米与蓝圈正在追查前和红色后，所以并没有取得真正的成功，但我告诉日本有一个1日元纪念币既然是适合破碎被轻和铝。 See the discussion of my coinshrinking on the 4HV forum . 见讨论，我的coinshrinking就 4hv论坛 。 Left photo is of the fibreglass and cloth and 4 inch PVC reinforced ice block housing the coil with inter-turn insulation above. 左图是该玻璃纤维及布和4英寸聚氯乙烯钢筋冰块房屋线圈间的绝缘以上。 It is shown after firing ( centre photo ) with a few ice shards that have cracked off in the shockwave. Right photo shows the current/time trace discussed below. 这表明经过射击（ 中心照片 ）与数冰shards已破获起飞冲击波。 右图示电流/时间追查下文讨论。
Incidentally I forgot and used plain tap water rather than deionised water (we use rainwater here for water supply). 顺便提一句我忘了，用普通的自来水，而不是去离子水（我们使用雨水这里的供水） 。 Unlikely to have made a difference. 不大可能作出了有差别。
Well the last 10 turn coil was fired in its block of ice. 以及过去10转线圈被辞退，在其座冰毒。 No exploding shards of ice just the bang of the spark gap. 没有爆炸shards冰刚好榜的火花间隙。 The ice developed cracks through it. 冰裂缝的发展，通过它。 After the shot I melted all the ice (similar to 'a watched kettle never boils') to get down to the coil. 后开枪i融化所有冰（类似'看着釜从未归结为' ） ，以脚踏实地线圈。 Unlike the previous attempts, there was no damage at all to the coil, no expansion and no inter-turn shorting. 不同于以往的尝试之后，有没有受到破坏，在所有向线圈，无膨胀，并没有跨转抛空。 Almost like it didn't fire (apart from the cracks in the ice) 几乎一样，它没有消防（除了从裂缝中的冰）
Unfortunately there was no shrinkage of my aluminium disc either. This is not a 'coin shrinker' yet. 不幸的是这并没有萎缩，我的铝制圆盘无论这是不是'硬币shrinker ' 。
Sadly, I now have to take apart the coil that took so much time to make so I can recover the disc. 可悲的是，我现在要考虑除了线圈发生了这么多时间，以这样我就可以收回光盘。
So, success in maintaining the integrity of the coil but not in shrinking the coin. 所以，要成功地保持了完整的线圈，而不是在缩小，金银纪念币。
So why didn't it work? The clue may be in the current time curve above. 那么为什么不工作？线索，可在目前的时间曲线以上。 Current scale is 4250 A/div and timebase 20 us/div as before. 现行比额表是4250 /理学系和时基20简介/广告如故。 Peak current is only 2.5 kA for the 10 turns. 峰值电流只有2.5家，为10转。 Which is much less than the 13 kA for 5 turns. 这是远低于13家， 5转。 The ringing is more prolonged and slower suggesting that energy is not being extracted well from the resonant circuit. I suppose this means a higher Q. 响当当的，是更为漫长而缓慢暗示能源是不能被提取，以及从谐振电路，我猜想，这意味着更高的问。
This suggests to me a couple of possibilities: 这表明，向我提出了几个可能性：
1 the longer coil of 10 thick turns is not as effective as the 5 thinner ones in concentrating the field near the coin. 一时间越长，线圈的10个厚厚的转折，是不是一样有效， 5天拿的，在集中场附近的金银纪念币。 The higher Q suggests this. 在较高的q表明这一点。
2 that interturn shorting is increasing the peak current and hence effectiveness of the coin crushing. 2间短路是提高峰值电流，因此成效银币破碎。 This means that simply winding magnet wire and expecting it to all explode and have some interturn shorting is important in getting the peak currents, greater than if the coil remained intact and well insulated and not expanded. Paradoxically I perhaps should have been encouraging my wire to short between turns rather than going to lengths to prevent it. 这意味着简单地缠绕电磁线，并期待着这一切发生爆炸，并有某种间短路是很重要的获取峰值电流，大于若线圈不变和幸福绝缘，并没有扩大。似非而是我可能要一直鼓励我的网短期之间轮流，而不是去长度，以防止它。  Coin shrinking results 2006 钱币萎缩， 2006年 结果
Normal coinshrinkers use a coil and some dowel but no external support. 正常coinshrinkers使用线圈和部分桩，但没有外部支持。
I wanted more of the force to be directed to the coin and to keep the work coil in proximity longer 我想要更多的部队能针对金银纪念币，并随时向工作线圈在接近更长
The work coil was still left over from last years experiments and is 10 turns of 2mm wire. 工作线圈仍遗留下来的，从过去几年的实验，是10转的2毫米线材。 The key is that it was interwoven with fiberglass cloth as the axial forces will slam the coil turns together and short them out. 关键在于，它是相互交织与玻纤布为轴向力将大满贯线圈轮流一起和短期出来。 Plastic would get squashed but I was hoping the fiberglass might do better. 塑料会得到squashed但我本来希望玻纤可能做得更好。
The whole thing was then wrapped in cloth from some garish print dress (not mine). 整个事情，然后裹在布从一些garish打印着装（不雷） 。 It was then placed in a PVC end cap and short pipe, filled with water and frozen. 它其后被放置在一个聚氯乙烯完帽和短管，灌满水和冻结。 That in turn went in another layer of end cap and pipe with the gap filled with water and frozen. 这反过来去，在另一层端盖和管道输送的石油与差距灌满水和冻结。 The hope was that the cloth would add strength to the ice like glass fiber does to epoxy to give fiberglass. 希望是布会增加实力，在冰面上像玻璃纤维是否以环氧给玻纤。
I was all enclosed in a wooden box. 我都已经密封在一个木箱。 I hid behind a blast shield and also had the setup monitoring current on the CRO with a Rogowski coil. So here are the setup photos and the damage done following a 5 kJ discharge. 隐藏背后的爆炸盾牌，也有设置监测电流对中CrO与Rogowski线圈，所以在这里设置的照片和所造成的损害，以下5千焦出院。 | 
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发表于 2008-3-21 22:35
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