JPH029533Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a capacitor in which internal parts are arranged together with a capacitor element in a metal container.

Conventionally, when interior components such as a safety device are placed inside a metal container that houses a capacitor element, it is difficult to avoid stray capacitance that occurs between some or all of the metal parts and the metal container, or between the metal part and the capacitor element. Partial discharge may occur from the metal part due to potential sharing. Therefore, it is necessary to sufficiently insulate the metal part or to make a reliable electrical connection so that the potential is the same as that of the high voltage part or the metal container part.

Due to the above-mentioned background, metal parts disposed in a metal container together with a capacitor element are often attached to the inner wall of the container by a method such as welding, resulting in poor workability and high cost.

The present invention eliminates the above-mentioned drawbacks and provides a capacitor that can be electrically connected reliably and efficiently and inexpensively.

The present invention will be explained below with reference to embodiments shown in FIGS. 1 to 3.

Fig. 1 is a cutaway front view of the main parts of the capacitor, Fig. 2 is an electric circuit diagram of the capacitor, and Fig. 3 is an explanatory diagram of the assembly of the main parts of the internal parts, where 1 is the metal container of the capacitor, and 2 is the metal container. A capacitor element is housed in 1, 3 is an interior component, 4 is a bracket fixed to the inner wall of the metal container 1, and 5 is fixed to an insulating support plate 7 that fits into the bracket 4 and holds the interior component 3. The L-shaped locking metal fitting 6 has one end electrically connected to the locking metal fitting 5 by welding, crimping, etc., and the other end is interposed between the opening of the metal container 1 and the seaming part 10 of the upper lid 8. The flat conductive lead 9 is a metal rivet. The above-mentioned interior component 3 usually has a conductor provided with a weak point of the safety device, and the insulating support plate 7 is provided with a notch,
The conductor is configured to be cut when the internal pressure increases and reaches a predetermined pressure, and the conductor is cut from the weak point.

The capacitor of the present invention is constructed as described above.

Therefore, when manufacturing a capacitor, it is extremely easy to fix the insulating support plate 7, and the metal of the fitting portion of the receiving fitting 4 and the locking fitting 5 is connected to the tightening portion of the metal container 1 via the conductive lead 6. Since the electrical connection is made at 10, the occurrence of partial discharge from the metal part due to stray capacitance etc. is reliably suppressed, and there is no insulation deterioration caused by this, resulting in an extremely reliable capacitor.

Although the above-mentioned embodiment describes an example in which the insulating support plate 7 is used as a part of a component of a safety device, it is also possible to use the insulating support plate 7 for insulation between an upper capacitor element and a lower capacitor element without having a safety device. It has similar effects and can be applied as appropriate depending on the purpose.

As mentioned above, the capacitor of the present invention is extremely advantageous in terms of prevention of partial discharge and productivity, and has great practical value.

[Brief explanation of drawings]

Figure 1 is a cutaway front view of essential parts of an embodiment of the capacitor of the present invention, Figure 2 is an explanatory diagram of the circuit of the capacitor of the present invention, and Figure 3 is an assembly of the main parts of the internal parts of the capacitor of the present invention. It is an explanatory diagram. 2: capacitor element, 3: interior parts, 4: receiving metal fitting, 5: locking metal fitting, 6: conductive lead, 7: insulating support plate.

Claims (1)

[Scope of utility model registration request] A capacitor formed by fitting and tightening a top cover into the opening of a metal container that houses a capacitor element and interior parts includes an insulating support plate that holds the interior parts, and an L-shaped support plate that is fixed to the insulating support plate. A locking metal fitting, a receiving metal fitting that fits into the locking metal fitting and is fixed to the inner wall of the metal container, one end of which is electrically connected to the locking metal fitting, and the other end of which is a seam-fastening portion between the metal container and the top lid. A capacitor comprising a conductive lead interposed between the capacitor and the conductive lead.