Dry-type direct-current filter capacitor suitable for being used in wet tropical zone
A technology of DC filtering and capacitors, which is applied in the direction of capacitors, electrical components, etc., can solve the problems of capacitor performance degradation, epoxy resin surface cracking, unusable and other problems, and achieve stable performance, small holes, and ensure reliability and stability. Effect
Inactive Publication Date: 2014-01-01
ANHUI SAFE ELECTRONICS
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Problems solved by technology
[0003] However, after several years of use of dry-type DC filter capacitors in a humid tropical environment with high humidity and high temperature, some capacitors will have epoxy resin potting material separated from the shell, and the exposed epoxy resin surface will crack, and the performance of the capacitor will deteriorate and cannot continue to be used. The phenomenon
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[0013] The content of the present invention will be described below in conjunction with specific embodiments.
[0014] Such as figure 1 As shown, it is a structural schematic diagram of the humid-tropical dry-type DC filter capacitor according to the present invention. The humid tropical dry type DC filter capacitor of the present invention comprises: a capacitor core group 1, an insulating layer 2, a potting material 3, a metal shell 4, a shell cover 5, and a lead terminal 6, and the capacitor core group 1 is arranged on the metal Inside the casing 4, the insulating layer 2 is provided between the capacitor core group 1 and the metal casing 4, the potting material 3 is filled in the gap in the metal casing 4, and the cover shell is fastened on the On the metal shell 4, the lead-out terminal 6 is fixed on the cover shell, and the lead-out terminal 6 is electrically connected to the capacitor core group 1, and the shell cover 5 is provided with a A tightly fitted filling open...
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The invention discloses a dry-type direct-current filter capacitor suitable for being used in a wet tropical zone. The filter capacitor comprises a capacitor core set, an insulating layer, pouring materials, a metal shell, a shell cover and a lead-out terminal, wherein the capacitor core set is arranged in the metal shell, the insulating layer is arranged between the capacitor core set and the metal shell, the pouring materials are injected in a gap in the metal shell, the shell cover is buckled to the metal shell, the lead-out terminal is fixedly arranged on the shell cover, the lead-out terminal and the capacitor core set are electrically connected, the shell cover is provided with a pouring port tightly matched with the lead-out terminal, and the lead-out terminal penetrates through the pouring port to seal the pouring materials. According to the dry-type direct-current filter capacitor, in a wet tropical zone environment which is high in humidity and temperature, the phenomena that the pouring materials are separated from the shell, the surface of exposed epoxy resin cracks, and performance of the capacitor is degraded cannot occur, and reliability and stability of operation of the capacitor are guaranteed.
Description
technical field [0001] The invention relates to a humid-tropical dry-type DC filter capacitor, which belongs to the technical field of electric connectors. Background technique [0002] DC filter capacitors are widely used in high-voltage direct current transmission (HVDC), static var compensation (SVC), wind power generation, electric locomotive traction, AC and DC power transmission, excitation, high-voltage soft start, high-voltage frequency conversion, rectifiers, various mechanical lifting The inverter of the device. It can effectively filter the additional ripple cost of the voltage and smooth the waveform. Dry-type DC filter capacitors generally use epoxy resin as the potting material, which has been widely used because it will not cause liquid leakage and is easy to install. [0003] However, after several years of use of dry-type DC filter capacitors in a humid tropical environment with high humidity and high temperature, some capacitors will have epoxy resin pott...
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IPC IPC(8): H01G2/10
Inventor 周涛周峰
Owner ANHUI SAFE ELECTRONICS