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DC-Link直流滤波电容器

DC-Link直流滤波电容器

  • 气候类别:40/85/21
  • 电容器公差:±5%
  • 标准:IEC 61071
  • 损耗:tg < 0.003
  • DC-Link铝壳干式直流滤波电容器

    内部构造Internal construction

    1、电介质

    该电容器是采用低损耗的金属化聚丙烯薄膜,该自愈式薄膜是采用进口基膜、应用专利技术蒸镀的渐变方阻安全膜。

    薄膜采用全自动化设备卷绕成圆柱形,应用无感卷绕技术,芯子内部采用薄铜片连接技术,使得电容器制作电感更小,过电流过电压能力更强。

    根据长期的使用与试验结果验证,我们的电容器电介质有非常好的自愈特性。

    我们采用在薄膜边缘加厚的形式,增大边缘接触面积,从而使薄膜与喷金面的接触部分更好,加大产品的过电流能力,减少边缘应力。

    2、溶剂

    电容器中填充的介质是为了隔离电极间的空气,没有填充介质的保护,金属镀层将会被氧化,金属化薄膜将会越来越多的被自愈,电容器的容量越来越小,损耗越来越大。

    因此,在我们将电容器放入铝壳中用聚氨酯进行灌注时,需要对电容器进行真空干燥处理,从而保护卷绕的芯子与其周围的环境,使得电容器在长期使用时容量非常稳定。

    电容器内部填充的是聚氨脂,因此该电容有很高的体积利用比,非常好的自愈特性和过压自动保护特性,当运行过程中发生意外状况或者电容器超负荷时,电容器内部会自动断开确保运行安全。

    技术与性能特性Technology and performance characteristics

    Compliance with Standards标准

    IEC 61071、IEC61881

    operating temperatures(Case)运行温度(外壳)

    -40°C to +70°C

    storing temperature存储温度

    -40 ... +85°C

    ΘHOTSPOT热点温度

    ≤85°C

    Capacitance tolerance电容器公差

    ± 5% or ± 10%

    tanδ0损耗

    2 x10-3(100Hz,20°C)

    Test voltage terminal to terminal UTT端子间测试电压

    1. RMSfor 10 seconds

    Test voltage terminal to case UTC端子与外壳间测试电压

    3kV - 50Hz for 60 seconds

    Permissible relative humidity允许的相对湿度

    75%Annual average≤95% on 30 days / year,年平均湿度75%,30天/年

    IEC climatic category IEC气候类别

    40 / 85 / 21

    Capacitance deviation in the operating temperature range of –25°C to +70°C在–25°C to +70°C温度下工作时允许容量变化值

    ±1.5% max on capacitance value measured at +20°C最大偏差±1.5%相对于20°C测量值

    Case components外壳成分

    Aluminium、plastic、304 stainless steel

    铝外壳、塑料外壳、304不锈钢外壳

    Terminals端子

    Tinned brass fastons or screws镀锡铜螺杆

    Installation安装位置

    Whatever Position任意位置

    Life Expectancy预期寿命

    ≥100.000 hours at Un

    Failure quota失效率

    50 FIT

    Recommended torque for screw connections推荐的连接扭矩

    内螺纹M6-3Nm,M8-6Nm

    特点Features

    应用于直流滤波电路中,可替代电解电容

    等效串联电阻小,能承受较大的纹波电流

    自感小

    有自愈性

    寿命长

    铝壳,树酯灌封

    应用场合Applications

    风能发电、太阳能发电用变频器上

    交通工具,如:电动车和混合动力车

    焊接设备,电梯,电机驱动 


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