DC-Link直流滤波电容器
DC-Link直流滤波电容器
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 |
|
|
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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