CN203055679U - A composite box bottom power capacitor - Google Patents

Abstract

Provided is a composite box bottom power capacitor. The composite box bottom power capacitor comprises a capacitor and a capacitor box bottom and is characterized in that a separating plate is disposed on the inner side of the capacitor box bottom, and that a hollow cavity is formed between the separating plate and the box bottom. A composite box bottom structure is formed by separating plate disposed on the inner side of the capacitor box bottom and the hollow cavity formed between the separating plate and the box bottom. The composite box bottom power capacitor has advantages of a simple structure, easy production, and an obvious noise-reducing effect. The noise at the power capacitor box bottom can be decreased by 3 to 5 dB through testing.

Description

Power capacitor at the bottom of multiple unit tube

Technical field

the utility model relates to electrical equipment technical field, particularly power capacitor at the bottom of a kind of multiple unit tube.

Background technology

when capacitor adds alternating voltage, between the electrode in condenser dielectric, will there is the effect of electrostatic force to produce, thereby make the element of capacitor internal produce vibration, the vibration of this element will be passed to shell and tank wall vibrated and form noise, from shell, radiate again, this noise belongs to compressional wave from propagation property, the noise of capacitor be mainly along at the bottom of case and the outlet casing tube direction propagate, with the noise testing result, match.Due to the outlet casing tube direction, be to adopt briquette structure between case lid and heart group, the vibrations of heart group have effectively been suppressed, and the top oil clearance is thicker, noise obtains decay to a certain extent, capacitor bottom other faces of noise ratio are serious, must take measures in the capacitor bottom, could reduce the noise of position, capacitor box bottom.

Summary of the invention

the purpose of this utility model is, reduces power capacitor at the bottom of the multiple unit tube of noise level of power capacitor.

the utility model is characterized in that the inboard at the bottom of capacitor box is provided with a dividing plate at the bottom of being achieved in that it comprises capacitor and capacitor box, forms cavity between at the bottom of dividing plate and case.

the utility model is because the inboard at the bottom of capacitor box is provided with a dividing plate, forms cavity between at the bottom of dividing plate and case, forms the multiple unit tube bottom structure, have simple in structure, easy to make, reduce the obvious advantage of noise result, can reduce the noise 3 ~ 5dB of position, power capacitor box bottom by test.

The accompanying drawing explanation

below in conjunction with accompanying drawing, the utility model is further described;

fig. 1 capacitor adopts the profile at the bottom of multiple unit tube,

fig. 2 is the local enlarged diagram of Fig. 1.

Embodiment

as shown in Figure 1-2, at the bottom of this multiple unit tube, power capacitor comprises at the bottom of capacitor 1, capacitor box 2 and dividing plate 3, and at the bottom of capacitor box, 2 inboard is provided with a dividing plate 3, at the bottom of dividing plate 3 and case, between 2, forms cavity.

Claims (1)

1. power capacitor at the bottom of a multiple unit tube, at the bottom of it comprises capacitor and capacitor box, is characterized in that the inboard at the bottom of capacitor box is provided with a dividing plate, forms cavity between at the bottom of dividing plate and case.

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