行业组件数据 · 2026

电容器单元

繁體:電容器單元

电容器单元是电力电容器组中的基本组件,用于在由介电材料隔开的导电板之间的静电场中存储电能。

技术定义与适配语境
典型 电容器单元 会按材料、尺寸公差、适配关系和失效风险在 电气设备制造 中评估。

电容器单元是电力电容器组中的基本组件,设计用于在由介电材料隔开的导电板之间的静电场中存储电能。它们被设计用于在工业电气系统中提供无功补偿、功率因数校正、电压稳定和谐波滤波。这些单元通过连接到电源时积累电荷并在需要时释放电荷来工作,有助于提高能源效率和系统可靠性。 电容器单元基于电容原理工作,其中电能存储在由介电绝缘体隔开的两个导电板(电极)之间产生的静电场中。当施加电压时,正负电荷分别积累在相应的板上,产生电场。存储的能量与电容值(以法拉为单位)和施加电压的平方成正比。在交流系统中,它们持续充电和放电,提供无功功率以抵消感性负载。

组件规格

定义
电容器单元是电力电容器组中的基本组件,设计用于在由介电材料隔开的导电板之间的静电场中存储电能。它们被设计用于在工业电气系统中提供无功补偿、功率因数校正、电压稳定和谐波滤波。这些单元通过连接到电源时积累电荷并在需要时释放电荷来工作,有助于提高能源效率和系统可靠性。

电容器单元基于电容原理工作,其中电能存储在由介电绝缘体隔开的两个导电板(电极)之间产生的静电场中。当施加电压时,正负电荷分别积累在相应的板上,产生电场。存储的能量与电容值(以法拉为单位)和施加电压的平方成正比。在交流系统中,它们持续充电和放电,提供无功功率以抵消感性负载。
工作原理
Capacitor units function based on the principle of capacitance, where electrical energy is stored in an electrostatic field created between two conductive plates (electrodes) separated by a dielectric insulator. When voltage is applied, positive and negative charges accumulate on the respective plates, creating an electric field. The stored energy is proportional to the capacitance value (measured in farads) and the square of the applied voltage. In AC systems, they continuously charge and discharge, providing reactive power to offset inductive loads.
材料
电极:铝或金属化聚丙烯薄膜介电材料:聚丙烯薄膜、浸渍介电液体的纸或陶瓷封装:环氧树脂、聚氨酯或金属外壳端子:铜或铝镀锡或镀银内部连接:铝箔或铜箔绝缘:聚酯薄膜或纸。
Lifetime
100,000 hours at rated conditions
Frequency
50 Hz or 60 Hz
Tolerance
±5% to ±10%
Capacitance
1 μF to 1000 μF
Rated Voltage
230 V to 15 kV
Temperature Range
-40°C to +85°C
Dissipation Factor
<0.001
标准
ISO 9001IEC 60831UL 810DIN EN 60831

行业分类与别名

电容器单元 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Overvoltage exceeding rated limits->Dielectric breakdown leading to short circuit->Install overvoltage protection devices (e.g., surge arresters), use units with higher voltage ratings, and implement voltage monitoring systems.
Inadequate cooling or high ambient temperature->Thermal runaway causing overheating and potential fire->Ensure proper ventilation, use cooling fans or heat sinks, monitor temperature with sensors, and select units rated for the operating environment.
Harmonic distortion in the power supply->Premature aging and reduced lifespan due to excessive stress->Install harmonic filters, use capacitors designed for harmonic-rich environments, and conduct regular power quality analysis.

工业生态与工程逻辑

0
Dielectric breakdown from overvoltage
1
Thermal runaway due to excessive current or poor cooling
2
Short circuits from internal faults
3
Fire hazard if failed catastrophically
4
Environmental contamination from dielectric fluids

合规与检测

tolerance
Capacitance tolerance within ±5% to ±10% as per IEC 60831; voltage tolerance must not exceed 110% of rated voltage continuously.
test method
Testing includes capacitance measurement using LCR meters, dielectric withstand test (high-pot test) per IEC 60831, dissipation factor measurement, and thermal cycling tests to ensure reliability under operational conditions.

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采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the primary function of a capacitor unit in a power capacitor bank?

The primary function is to store and release electrical energy to provide reactive power compensation, which improves power factor, reduces energy losses, and stabilizes voltage in industrial electrical systems.

How do capacitor units differ from batteries?

Capacitor units store energy electrostatically in an electric field and can charge/discharge rapidly, while batteries store energy chemically and provide longer-term energy storage but with slower charge/discharge cycles.

What are common failure modes of capacitor units?

Common failures include dielectric breakdown due to overvoltage, thermal runaway from excessive heat, electrolyte drying in wet types, and terminal corrosion, often mitigated through proper sizing, cooling, and protective circuits.

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CNFX Industrial Component Index · 电气设备制造

数据基础

CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。

初步技术归类
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