The application of Sanying aluminum electrolytic capacitors in the electronic industry is becoming increasingly widespread, and the ripple current of aluminum electrolytic capacitors plays an important role in their characteristics. So what is the ripple current of an electrolytic capacitor? What are the characteristics of ripple current? How to maintain it correctly in daily use? Let's take a look at the following article with these questions.

　　1、铝电解电容纹波电流因素

　　Ripple current factor of aluminum electrolytic capacitors

　　当交流电受到脉动电压或纹波电压的影响流经设备时，使用rms值表示纹波电流。最大允许纹波电流取决于环境温度、电容器表面积(例如散热区域)、损耗角正切tanδ(或者ESR)以及交流频率。

　　When alternating current flows through the device under the influence of pulsating or ripple voltage, the RMS value is used to represent the ripple current. The maximum allowable ripple current depends on the ambient temperature, capacitor surface area (such as heat dissipation area), and loss angle tangent tan δ (or ESR) and communication frequency.

　　由于热应力对于铝电解电容器寿命有决定性作用，由纹波电流产生的热量就是影响使用寿命的重要因数。

　　Due to the decisive effect of thermal stress on the service life of aluminum electrolytic capacitors, the heat generated by ripple current is an important factor affecting the service life.

　　这些热量因数暗示，在特定环境下，必须选用比常规条件耐压更优及电容更高的电解电容器来对应不同应用。

　　These heat factors imply that in specific environments, electrolytic capacitors with better withstand voltage and higher capacitance than conventional conditions must be selected to correspond to different applications.

　　2、纹波电流的频率特性

　　Frequency characteristics of ripple current

　　铝电解电容的损耗角正切(与ESR有关)随施加电压的频率不同而不同。因此，纹波电流也依赖于频率。在单独的规格书中，电容器的纹波电流能力通常是在100或者120Hz条件下，或者在某些个例中为10或者10kHZ。其他工作频率下的转化因数以图表的形式给出。

　　The loss tangent of aluminum electrolytic capacitors (related to ESR) varies with the frequency of applied voltage. Therefore, the ripple current also depends on frequency. In separate specifications, the ripple current capacity of capacitors is usually at 100 or 120Hz, or in some cases at 10 or 10kHz. The conversion factors at other operating frequencies are presented in the form of charts.

　　3、纹波电流的温度特性

　　Temperature characteristics of ripple current

　　针对每种电容器型号的上限类别温度，相应规格书明确了最大允许纹波电流。针对多数类别温度超过85℃的型号，规格书还给出了85℃时的纹波电流以做比较。

　　The corresponding specifications specify the maximum allowable ripple current for the upper limit category temperature of each capacitor model. For most types of models with temperatures exceeding 85 ℃, the specification also provides the ripple current at 85 ℃ for comparison.

　　在每种电容器的规格书中，还列出了其他环境温度以及纹波电流条件下持续工作的限值表。

　　In the specifications of each type of capacitor, a limit table for continuous operation under other environmental temperature and ripple current conditions is also listed.

　　4、铝电解电容的使用维护

　　Use and maintenance of aluminum electrolytic capacitors

　　铝电解电容器维护最重要的几点：安全要求和措施。有内部热量设备内的安装。过压损坏，火灾。并联和串联电容器电路。

　　The most important points for maintaining aluminum electrolytic capacitors are safety requirements and measures. Installation within internal heat equipment. Overpressure damage, fire. Parallel and series capacitor circuits.

　　对工业应用设备用电解电容器应进行周其性检查。在检查前，要确保关闭电源并仔细对电容放电。要检查电容器，在使用电压——欧姆表测量时要确保电容极性正确，另外，切勿在电解电容端子上施加任何机械应力，周期性检查要包括以下项目：

　　Electrolytic capacitors used in industrial application equipment should undergo a physical inspection. Before checking, make sure to turn off the power and carefully discharge the capacitor. To check the capacitor, ensure that the polarity of the capacitor is correct when measuring with a voltage ohmmeter. Additionally, do not apply any mechanical stress to the terminals of the electrolytic capacitor. Periodic checks should include the following items:

　　严重的外觉破损：是否弯曲。电解液是否泄漏等。

　　Severe external damage: whether it is bent. Check for electrolyte leakage, etc.

　　电气参数：漏电流、电容、tanδ及产品系列或产品规格中规定的其它特性。

　　Electrical parameters: leakage current, capacitance, tan δ And other characteristics specified in the product series or product specifications.

　　如果发现存在上述任何一种问题，要立即进行更换或采取适当措施。检查过程中不能用手触摸端子，因为有电容带较高的余电。

　　If any of the above problems are found, immediate replacement or appropriate measures should be taken. During the inspection process, do not touch the terminals with your hands because there is high residual electricity in the capacitor strip.

　　相信大家对三莹电解电容有了进一步的了解和认知，如果您正好需要采购铝电解电容的可以随时咨询山东宏明电子。

　　I believe everyone has a further understanding and understanding of Sanying electrolytic capacitors. If you happen to need to purchase aluminum electrolytic capacitors, please feel free to consult Shandong Hongming Electronics at any time.