155MMR400K

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Film capacitors are the most important part of electric and electronic engineering technology. The MR400K 155MM film capacitor is a type of capacitance technology widely used in power electronics, and is often referred to as a "superior film capacitor". Its application and working principle are as follows.

Applications

MR400K 155mm film capacitors are mainly used in power electronic systems. Generally, they are used as a means of compensation and current shunt. Typical applications include power electronic dc-dc converters, switching power supplies, uninterrupted power supplies, AC drives, power solar systems, wind turbine rectifier systems, large current capacitor banks and high voltage switching converters. MR400K 155mm film capacitors are also used in power equipment such as large capacitors and reactors.

Working Principle

MR400K 155mm film capacitors have three layers. The inner and outer sides are metallized aluminum, and the separation layer is placed in between. It is mainly used for the compensation of voltage, current and power changes in power electronic systems. Its working principle is as follows:

The outer metallized aluminum layer of the film capacitor is connected to the positive terminal of the circuit, and the inner metallized aluminum layer is connected to the negative terminal of the circuit. When a voltage is applied to the dielectric material, it will cause the particles to align with the electric field, resulting in a polarized electric field. In this situation, an electric current is created and flows through the circuit. The current flow is equal to the applied voltage multiplied by the capacitance value. Since the capacitance value is larger than that of the electrolytic capacitor, the current ripple is low.

In addition, the MR400K 155mm film capacitor can be used to reduce the power fluctuations of the power electronic system, such as high frequency or low frequency ripples. This can be done by adding an inductor and other passive components in series with the capacitor. The phase shift between the voltage and current provided by the inductor in combination with the capacitance of the capacitor can form a low pass filter circuit.

The MR400K 155mm film capacitor, with its high-precision, low-loss, and self-healing characteristics, provides a high level of reliability and performance when incorporated into a variety of power electronic systems. This, coupled with its superior vibration and shock resistance, allows for a wider operating range and smoother operation. Furthermore, its ability to withstand high current, surges, and voltage are also important features that makes this type of capacitor ideal for power electronic systems.

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