B32656S7105J561

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Film Capacitors, such as B32656S7105J561, are typically available for applications in power factor correction (PFC), filtering, decoupling, etc. Film Capacitors have become the industry standard for many industrial and high power applications because of their low impedance, low capacitance losses, high ripple current capability, and low temperature coefficients. In addition, they can be used in a variety of configurations including single layer, multiple layers, and multi-tap designs.

B32656S7105J561 is a type of film capacitor specifically designed for DC-Link applications that supply power to the motor inverter. It is a 35mm diameter ‘slow-rise’ metalized polycarbonate capacitor with an operational temperature range of -25 to 125℃ and an operational voltage of 1000Vdc.

The construction of this type of capacitor involves the layering of two materials: a metallizing film and a plastic film. The metallizing film is formed by vapor-depositing a thin layer of aluminum onto a plastic substrate. This layer acts as the outer layer of the capacitor, protecting it from abrasion or corrosion. The plastic substrate is then often impedance matched to further reduce capacitance loss. The plastic film has high dielectric strength, enabling it to withstand higher voltages.

The working principle of a film capacitor is based on three components. Firstly, the outer metallized film functions by storing electrical charge. Secondly, the dielectric film acts as an insulator and isolates the outer layer from the inner layer. Lastly, an electrically conductive material, such as silver impregnated carbon, serves as a connection between the two layers. When a voltage is applied across the capacitor’s plates, the outer metallized film will store electrical charge. This charge and the dielectric film together form an electric field, which is the primary source of capacitance.

Film capacitors are typically used in three main applications. Firstly, they are used in DC-Link applications in motor inverters to reduce the input current harmonics and improve the power factor. Secondly, they are used in active filter circuits to reduce the ripple current and noise. Lastly, they are used in switch-mode power supplies (SMPS) to filter and decouple the input and output of the system.

In summary, B32656S7105J561 is a type of film capacitor specifically designed for DC-Link applications in motor inverters. The construction of this capacitor involves the metallizing and plastic film, and its working principle is based on three components of charge storage, dielectric insulation and conductivity. Film capacitors are used in motor inverters, active filters and SMPS for power factor correction, filtering and decoupling.

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