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盘点4种测量高压瓷片电容好坏的方法
作者:红宝电容 来源:本站原创 日期:2020-07-13 09:12 浏览

  高压瓷片电容是一种以陶瓷材料为介质的电容器,一个主要的特点就是耐压高,2KV、3KV电压很常见。高压瓷片电容的工艺是在陶瓷表面涂覆一层金属薄膜,再经高温烧结后作为电极而成的电容器。瓷片电容应用在高稳定震荡回路中,因稳定,绝缘性好,耐压高而被大家广泛应用。

  High voltage ceramic capacitor is a kind of capacitor with ceramic material as dielectric. One of its main characteristics is high withstand voltage. 2KV and 3KV voltage are very common. The technology of high voltage ceramic chip capacitor is to coat a layer of metal film on the surface of ceramic, and then sintered at high temperature as the electrode. Ceramic capacitor is widely used in high stability oscillation circuit because of its stability, good insulation and high withstand voltage.

  选择一个好的高压瓷片电容需要经过严格的筛选测试才能找到合适的高压瓷片电容,这里山东红宝电子小编总结了以下4个方法可以准确测量出高压瓷片电容的好坏。我们常用的测量工具就是:数字万用表。

  To select a good high voltage ceramic capacitor, we need to go through strict screening test to find the appropriate high-voltage ceramic capacitor. Here, Shandong Hongbao electronic editor summarizes the following four methods to accurately measure the quality of high-voltage ceramic chip capacitor. Our common measuring tool is: digital multimeter.

高压瓷片电容.jpg

  方法一、检测10PF~0 01μF固定电容器是否有充电现象来判断其好坏。

  Method 1. Check whether there is charging phenomenon in 10pf-0.01 μ f fixed capacitor to judge whether it is good or bad.

  万用表选用1k挡,两只三极管的β值均为100以上,且穿透电流要小。可选用3DG6等型号硅三极管组成复合管。万用表的红和黑表笔分别与复合管的发射极e和集电极c相接。由于复合三极管的放大作用,把被测电容的充放电过程予以放大,使万用表指针摆幅度加大,从而便于观察。

  When the multimeter is 1K gear, the β value of both triodes is more than 100, and the penetration current should be small. 3DG6 and other silicon triodes can be selected to form the composite tube. The red and black probes of the multimeter are respectively connected with the emitter E and collector C of the composite tube. Because of the amplification effect of the composite triode, the charging and discharging process of the measured capacitance is amplified, and the pointer swing of the multimeter is increased, which is convenient for observation.

  方法二、检测10pF以下的小电容,因10pF以下的固定电容器容量太小,用万用表进行测量,只能定性的检查其是否有漏电,内部短路或击穿现象。测量时,可选用万用表10k挡,用两表笔分别任意接电容的两个引脚,阻值应为无穷大。若测出阻值(指针向右摆动)为零,则说明电容漏电损坏或内部击穿。

  The second method is to detect the small capacitance below 10PF. Because the capacity of the fixed capacitor below 10PF is too small, the multimeter can only qualitatively check whether there is leakage, internal short circuit or breakdown. When measuring, the 10K gear of the multimeter can be selected, and the two pins of the capacitance can be connected with two probes at random. The resistance value should be infinite. If the measured resistance (pointer swing to the right) is zero, it indicates that the capacitor is damaged by leakage or internal breakdown.

  方法三、对于0 01μF以上的固定电容,可用万用表的10k挡直接测试电容器有无充电过程以及有无内部短路或漏电,并可根据指针向右摆动的幅度大小估计出电容器的容量。

  Method 3. For the fixed capacitors above 0.01 μ F, the 10K gear of the multimeter can be used to directly test whether the capacitor has charging process and whether there is internal short circuit or leakage, and the capacity of the capacitor can be estimated according to the amplitude of the pointer swinging to the right.

  方法四、在测试操作时,特别是在测较小容量的电容时,要反复调换被测电容引脚接触A、B两点,才能明显地看到万用表指针的摆动。

  Method 4. In the test operation, especially when measuring the capacitance with small capacity, the pin of the capacitance to be tested should be repeatedly changed to contact a and B points, so that the swing of the multimeter pointer can be seen clearly.

  在测试过程中我们需要注意的是:数字万用表有带电容测试档位,可以直接测瓷片电容的容量。不带这个档位就不能测容量,只能用电阻档粗略判断通断。瓷片电容坏的较少,主要看看其是不是耐压不够,漏电等,普通万用表很难查到。如果万用表测有阻值就坏了,耐压够不够不好测,代换法是一个更好的方法。

  In the process of testing, we need to pay attention to the fact that the digital multimeter has capacitance test gear, which can directly measure the capacitance of ceramic chip. Without this gear, the capacity can not be measured, only the resistance can be used to roughly judge the on-off. Porcelain capacitor is less broken, mainly to see whether it is not enough withstand voltage, leakage, etc., ordinary multimeter is difficult to check. If the multimeter has resistance value, it will be broken. If the withstand voltage is not good enough, the substitution method is a better method.

  选择高品质的高压瓷片电容才能保证产品的正常运行,否则会给企业带来不必要的麻烦。山东红宝电子有限公司专业经营电容器元件22年,品类齐全,质量上乘,赢得了众多合作伙伴的青睐。

  The selection of high-quality high-voltage ceramic capacitor can ensure the normal operation of the product, otherwise it will bring unnecessary trouble to the enterprise. Shandong Hongbao Electronic Co., Ltd. has been specialized in capacitor components for 22 years, with complete categories and high quality, which has won the favor of many partners.

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