Influence of production of film capacitance on parameter

What are the effects of film capacitors on parameter variables, including these four factors, namely, capacitance, loss tangent, insulation resistance and withstand voltage. The production process of film capacitors is also closely related to the requirements of ensuring the four parameters. The production process causes the capacitance deviation of the capacitances. The capacitance of the film capacitance C = 0.177 e s / D is the effective area of the medium and the effective area of the plate is d. The thickness capacitance of the medium is proportional to the epsilon and s, and is inversely proportional to the D.

In the production process, these parameters will change, resulting in capacity error. The core of the technology is to reduce these errors and increase the hit rate of capacity. Winding process: film width, thickness or margin and other deviation itself. The variation of tension of membrane from big circle to small circle, the error of tension of winding machine. The pressure of the roller is too small. The winding process deviates from the error of the wrong side.

When the air humidity is large, the capacity of the core is larger. Hot pressing process: the thickness error of the core is not uniform in force, resulting in the loose core, the capacity dispersion, the hot plate unevenness, and the temperature error. Heat treatment time or temperature error includes immersion: Vacuum error, time error, and curing temperature error.