Internal series capacitance element of power capacitor

Abstract

The invention discloses an internal series capacitance element of power capacitor, which comprises a first pole plate (1), insulating films (2), at least one middle pole plate (3) and a second pole plate (4). The at least one middle pole plate (3) is arranged between the first pole plate (1) and the second pole plate (4). Insulating films (2) are arranged between the first pole plate (1) and the middle pole plate (3), among the middle pole plates (3) and between the second pole plate (4) and the middle pole plate (3). The middle pole plate (3) serves as the common pole plate for the first pole plate (1) and the second pole plate (4). The first pole plate (1) and the second pole plate (4) form an internal series capacitance element through the middle pole plates (3) and the edges of the first pole plate (1) and the second pole plate (4) that are longer than those of the insulating films (2) are used as the lead-out pole of the internal series capacitance element. Since the external series capacitance elements are combined as an independent internal series capacitance element, the thickness of the internal series capacitance element is increased, which reduces the difficulty in processing, and at the same time, the use amount of aluminum foils can be reduced, thus putting the manufacturing cost down.

Description

technical field [0001] The invention relates to the technical field of power capacitors, in particular to an internal series capacitor element of a power capacitor. Background technique [0002] In power capacitors, the capacitive element is the most critical and important part in the manufacture of capacitors, and its quality directly affects the quality of the capacitor. At present, the capacitive element structure commonly used by domestic capacitor manufacturers is the traditional structure, such as figure 1 As shown, a pole plate 1 is arranged on the top and bottom of the insulating film 2, and its electrical connection is as follows figure 2 As shown, multiple capacitive elements are connected in parallel and then in series. [0003] In order to meet the selection principle of the internal fuse, each series section must ensure that more than 8 capacitive elements are connected in parallel. In this way, when the capacitor capacity is small and the voltage is high, th...

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Problems solved by technology

[0003] In order to meet the selection principle of the internal fuse, each series section must ensure that more than 8 capacitive elements are connected in parallel. In this way, when the capacitor capacity is small and the voltage is high, the capacitive element must be processed very thin, which increases the difficulty of processing the capacitive element. , at the same time, it also increases the labor cost

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