High-resistivity capacitor

Abstract

The utility model provides a high resistivity capacitor, which comprises an insulating shell, a ceramic core and two metal electrodes led out from the two ends of the ceramic core, the ceramic core is arranged in the insulating shell, the insulating shell comprises a shell, a left cover and a right cover, a plurality of insulating support columns are arranged between the ceramic core and the insulating shell, and the insulating support columns are connected with the ceramic core. An insulating layer is filled between the shell and the ceramic core, a plurality of heat dissipation silica gel columns are arranged on each surface of the outer side of the ceramic core, the heat dissipation silica gel columns penetrate through the insulating layer and are attached to the inner wall of the insulating shell, and a shock pad is arranged at the lower end of the outer side of the insulating shell. The beneficial effects of the utility model are that the plurality of heat dissipation silica gel columns are arranged between each surface of the outer side of the ceramic core and the insulating housing, so that the heat dissipation performance of the capacitor is improved, and the loss of the capacitor is reduced; the ceramic core is adopted, so that the ceramic core has high resistivity; and a shock pad is arranged on the outer side of the lower end of the insulating shell, so that the device works in a vibration environment, and vibration force is effectively buffered.

Description

Technical Field

[0001] This invention belongs to the field of electronic components technology, and is particularly suitable for a high resistivity capacitor. Background Technology

[0002] High resistivity capacitors typically refer to capacitors with high insulation performance or special resistive-capacitive characteristics, commonly used in high-voltage, high-frequency, or precision circuits. In motor drive applications, the low cathode resistivity of capacitors leads to an increase in the inductor circuit, undoubtedly increasing inductor losses; vibration can also cause the capacitor mounting points to loosen, posing a safety hazard. Utility Model Content

[0003] The purpose of this invention is to provide a high resistivity capacitor that has high resistivity, improves its shock absorption effect, and has heat dissipation function, making it particularly suitable for motor drives.

[0004] The technical solution of this utility model is as follows: a high resistivity capacitor includes an insulating shell, a ceramic core, and two metal electrodes extending from both ends of the ceramic core. The insulating shell contains the ceramic core and includes an outer shell, a left cover, and a right cover. The outer shell has openings at its left and right ends, and the left cover and right cover are fixed to the openings at their respective ends. Multiple insulating support pillars are provided between the ceramic core and the insulating shell. An insulating layer is filled between the outer shell and the ceramic core. Multiple heat-dissipating silicone pillars are provided on each side of the outer surface of the ceramic core, and the heat-dissipating silicone pillars pass through the insulating layer and are set against the inner wall of the insulating shell. The two metal electrodes pass through the insulating layer and pass through the perforations of the left cover and the right cover, respectively, and are located on the outer surface of the insulating shell. A shock-absorbing pad is provided at the lower outer end of the insulating shell.

[0005] Preferably, the ceramic core is made of stacked ceramic dielectric films, which are sintered to form a monolithic structure with metal electrodes at both ends, and the ceramic dielectric is barium titanate-based ceramic.

[0006] Preferably, the left and right covers are provided with mounting holes, and the left and right ends of the outer shell are provided with threaded holes that mate with the mounting holes. The fixing bolts pass through the mounting holes, and the threads are located inside the threaded holes.

[0007] Preferably, the insulating layer is epoxy resin, which has good insulation effect.

[0008] The advantages and positive effects of this utility model are as follows: due to the adoption of the above technical solution, multiple heat dissipation silicone pillars are provided between each side of the ceramic core and the insulating shell, which improves its heat dissipation and reduces capacitor loss; the use of ceramic core can make it have high resistivity; a shock-absorbing pad is provided on the lower outer side of the insulating shell, which enables it to work in a vibration environment and effectively buffers the vibration force. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] Figure 2 This is an internal top view of the present invention.

[0011] In the picture:

[0012] 1. Insulating outer shell; 2. Ceramic core; 3. Metal electrodes

[0013] 4. Insulating support column; 5. Insulating layer; 6. Heat-dissipating silicone column.

[0014] 7. Shock-absorbing pads Detailed Implementation

[0015] like Figure 1 , 2 As shown, the technical solution of this utility model includes an insulating shell 1, a ceramic core 2, and two metal electrodes 3 extending from both ends of the ceramic core 2. The insulating shell 1 houses the ceramic core 2 and includes an outer shell, a left cover, and a right cover. The outer shell has openings at its left and right ends, and the left and right covers are fixed to these openings respectively. Multiple insulating support pillars 4 are provided between the ceramic core 2 and the insulating shell 1. An insulating layer 5 is filled between the outer shell and the ceramic core 2. Multiple heat-dissipating silicone pillars 6 are provided on each side of the outer surface of the ceramic core 2, passing through the insulating layer 5 and fitting against the inner wall of the insulating shell 1. The heat generated by the ceramic core 2 is transferred through the multiple heat-dissipating silicone pillars 6, improving its heat dissipation. The two metal electrodes 3 both pass through the insulating layer 5 and through perforations in the left and right covers respectively, and are located on the outer surface of the insulating shell 1.

[0016] The lower outer side of the insulating shell 1 is provided with a shock-absorbing pad 7. The capacitor is installed inside the motor through the shock-absorbing pad 7 and the contact parts, which can effectively buffer the vibration of the motor to the capacitor. This prevents the capacitor from falling off due to loose fixing screws when the capacitor is working under vibration for a long time, and avoids leakage caused by long-term impact, thus preventing safety accidents.

[0017] In this embodiment, the ceramic core 2 is made of stacked ceramic dielectric films, which are sintered to form a monolithic structure with metal electrodes at both ends. The ceramic dielectric is barium titanate-based ceramic.

[0018] In this embodiment, the left and right covers are respectively provided with mounting holes, and the left and right openings of the outer shell are respectively provided with threaded holes that mate with the mounting holes. The fixing bolts pass through the mounting holes, and the threads are provided in the threaded holes.

[0019] In this embodiment, the insulating layer 5 is epoxy resin, which has good insulation effect.

[0020] The working process and principle of this example: When in use, the capacitor with shock-absorbing pad 7 is fixedly connected to the motor through a contact to make it shock-absorbing; at the same time, the heat dissipation rubber column 6 improves its heat dissipation.

[0021] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A high resistivity capacitor characterized by: The application relates to an insulating shell, a ceramic core and two metal electrodes drawn from both ends of the ceramic core, the ceramic core is arranged in the insulating shell, the insulating shell comprises a shell, a left cover and a right cover, the left and right ends of the shell are open, the left and right covers are respectively fixed on the left and right end openings of the shell, a plurality of insulating support columns are arranged between the ceramic core and the insulating shell, an insulating layer is filled between the shell and the ceramic core, a plurality of heat-dissipating silica gel columns are arranged on each side of the outer side of the ceramic core, the heat-dissipating silica gel columns pass through the insulating layer and are arranged on the inner wall of the insulating shell, the two metal electrodes pass through the insulating layer and respectively pass through the perforations of the left cover and the right cover, and the two metal electrodes are arranged on the outer side of the insulating shell, and a shock-absorbing pad is arranged on the lower end of the outer side of the insulating shell.

2. A high resistivity capacitor as defined in claim 1, wherein: The ceramic core is stacked by ceramic dielectric diaphragms.

3. A high resistivity capacitor as defined in claim 1, wherein: The left cover and the right cover are respectively provided with mounting holes, the left and right end openings of the shell are respectively provided with screw holes matched with the mounting holes, and fixing bolts pass through the mounting holes and are screwed in the screw holes.

4. A high resistivity capacitor as defined in claim 1, wherein: The insulating layer is epoxy resin.

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