CN202018885U

CN202018885U - Metallization film high-capacity capacitor with good vibration resistance performance

Info

Publication number: CN202018885U
Application number: CN2010206809553U
Authority: CN
Inventors: 杨文周
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-27
Filing date: 2010-12-27
Publication date: 2011-10-26
Anticipated expiration: 2020-12-27

Abstract

The present utility model discloses a metallization film high-capacity capacitor with good vibration resistance performance. The capacitor is composed of a box, a capacitor set arranged inside the box, leading-out wires for connecting the capacitor set, and an epoxy resin layer arranged between the box and the capacitor set. The capacitor is characterized in that the capacitor set is composed of a plurality of metallization film capacitor fuses which are connected in parallel or a plurality of capacitor sets which are connected in series. Heat-conducting medium layers are arranged inside places of the epoxy resin layer, where the epoxy resin layer borders with the metallization film capacitor fuses of the capacitor set. The front end face of the box is provided with a seal-capping, and the seal-capping is provided with supporting pins adjacently arranged with the leading-out wires. On the basis of retaining relevant superior performances of the prior metallization film capacitor, a part of common liquid state aluminum electrolytic capacitors are replaced, thus the application scope is effectively widened. Moreover, the problem of low capacity, low voltage and low current of the prior metallization film capacitor is solved, and the damage of external vibration on the capacitor can be kept away automatically and effectively.

Description

Metallized film large value capacitor with good resistance to shock

Technical field:

The utility model relates to a kind of large value capacitor, especially belongs to a kind of metallized film large value capacitor with good resistance to shock.

Background technology:

Country is in the development of clean energy resource, such as a large amount of development hybrid vehicles that use, and Electric power car is the variable frequency power supply that representative uses, the environment of its use is at-40 ℃～+ 85 ℃, but it must be jumbo capacitor that capacitor requires, capacitor at this type of requires to have good proof voltage, jumbo capacitor, and the capacity of at present single metallic film capacitor is big inadequately, does not satisfy the demand to large value capacitor such as hybrid vehicle and Electric power car.In powerful power electronic equipment, film capacitor has obtained using widely as the energy-storage travelling wave tube of important conversion and power controlling.The power capacitor that uses on rail vehicles such as urban light rail, subway, main line railway locomotive is high voltage withstanding except that requiring it to have, and self-inductance is low, and dielectric loss is little, and the reliability height outside the technical characteristics such as average life span length, also requires to have resistance to shock preferably.Yet film capacitor is not outstanding aspect resistance to shock, can't satisfy the requirement in the practical application fully.Under the prior art condition, film capacitor is directly installed in the frame, owing to be subjected to the restriction of locus special vibration absorber can't be installed, cause the film capacitor long-time running under the operational environment of vibration, therefore cause the damage of capacitor and connection bus easily.

Summary of the invention:

The purpose of this utility model is to provide a kind of simple in structure, economical and practical, super-large current, high voltage bearing a kind of metallized film large value capacitor with good resistance to shock, on the basis that keeps the relevant superior function of existing metallic film capacitor, substitute part ordinary liquid alminium electrolytic condenser, thereby effectively widen range of application.Solve the present situation of existing metallized film capacitor low capacity, low-voltage, little electric current, it can independently resist the infringement of external vibration to it effectively.

The purpose of this utility model is to realize like this, described metallized film large value capacitor with good resistance to shock, by box, capacitance group in the box, the lead-out wire and the epoxy resin layer between box and the capacitance group that connect capacitance group constitute, its design feature is that described capacitance group composes in parallel capacitance group by a plurality of metallized film capacitor fuses or formed through being connected in series by a plurality of described capacitance group again, is provided with the heat-conducting medium layer in the epoxy resin layer of the metallized film capacitor fuse of capacitance group and epoxy resin layer intersection; Front end face at box is provided with capping, and capping is provided with the supporting pins with the adjacent arrangement of lead-out wire.

The purpose of this utility model can also be achieved through the following technical solutions, described metallized film large value capacitor with good resistance to shock, and its characteristics are that the front end face of box is connected with capping by cushion.

Advantage of the present utility model: the utility model is in order to overcome the existing less shortcoming of metallic film capacitor capacity, by several metallized film capacitor fuses are composed in parallel capacitance group or some capacitance group are solidified with epoxy encapsulation again in coupled in series places box, thereby can provide the metallic film capacitor of 20 μ F～3000 μ F capacity, useful life was above 10 years when temperature range was used to-40 ℃～+ 70 ℃, nonpolarity dielectric requirement, in the capacity assurance and in proof voltage and miniaturization, played qualitative leap, replace electrochemical capacitor with the utility model, no longer exist electrochemical capacitor in the later leakage problem of long-term use, the occasion of using can expand railway illumination to, and big bridge lighting, in the illumination of air harbor and the hybrid power of modern development, the Electric power car industry gets on, for metallized capacitor has been expanded the scope of application.The utility model also can be applicable in the rail vehicle.This film capacitor with good resistance to shock can adapt to long-term vibration operational environment, and it can independently resist the infringement of external vibration to it effectively, protection pin, long service life, reliability height.This capacitor is specially adapted in the rail vehicle.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Among the figure: capacitor core 1,2,3, lead-out wire 4,5, epoxy resin layer 6, box 7, heat-conducting medium layer 8, supporting pins 9, capping 10, cushion 11.

Embodiment:

Below in conjunction with accompanying drawing and example, structure of the present utility model and operation principle are elaborated:

As shown in Figure 1, the metallized film large value capacitor with good resistance to shock described in the utility model, by box 7, the capacitance group in the box 7, the lead-out wire 4,5 and the epoxy resin layer between box 7 and the capacitance group 6 that connect capacitance group constitute.Capacitance group is formed capacitance group according to the capacitance requirement by the metallized film capacitor fuse 1,2 to N of some parallel connections, according to capacitance and voltage request, some capacitance group can be formed through coupled in series again.Front end face at box 7 is provided with capping 10, the front end face of box 7 is connected with capping 10 by cushion 11, lead-out wire 4,5 freely passes capping 10, capping 10 is provided with the supporting pins 9 with lead-out wire 4,5 adjacent arrangements, since increased on the box 7 capping 10 that is used for fixing capacitor and on supporting pins 9, thereby shared the stressing conditions of lead-out wire 4,5 in vibration environment, make it be not easy fracture.Make it under the environment of constantly vibration, to use.

The basement membrane that capacitor core 1,2 or N adopt is polyester film or polypropylene film, the thickness of basement membrane is at 1～4 μ m, the process evaporated metal layer is reeled later on, and the film of evaporation is aluminum metallization layers or zinc-aluminium metal level, the characteristics of this kind material: plate the layer of metal layer on the surface of film, metal level has good electrical conductivity and self-healing property, be difficult for oxidation and be easy to depositing, the uniformity of coating is better, the adhesive force jail, have excellent mechanicalness and electrical property, side's resistance of general coating is 2 Ω--12 Ω.

The capacitor core 1 of winding or N heat-treat and hot-forming after again its electrode tip is carried out metal spraying, make the both ends of the surface of fuse spray the metal level that does not contain lead, be pltine and Zinc-tin alloy metal level, metal layer thickness is 0.45 ± 0.1mm, can guarantee the strong bonded of fuse and metal level like this, fuse is carried out judging that by detection means the technical parameter of single fuse is controlled within the scope after direct current and the alternating voltage self-healing processing.

Among Fig. 1 capacitor core 1 to 3 assembled arrangement arranged side by side is got up, convert according to required capacity, the quantity that the mode of combination adopts can have various mode, lead-out wire 4,5 is welded on the two ends of capacitance group.

The capacitance group that welding is finished is put into 7 li in box, carry out cured after again epoxy resin being poured into.Owing to adopt a large amount of as thin-film capacitor fuse 1,2,3 and connect, be serially connected again after also can and connecing, be easy to generate heat, thereby in the epoxy resin layer 6 of metallized film capacitor fuse 1,2,3 and epoxy resin layer intersection, be provided with heat-conducting medium layer 8, heat-conducting medium layer 8 is realized the good heat radiating of thin-film capacitor fuse 1,2,3, the purpose that adds heat-conducting medium layer 8 is to utilize the good heat conductive effect of heat-conducting medium layer, heat is dispelled the heat by box 7 through epoxy resin layer 6 again, box 7 is the aluminium box, and radiating effect is preferable.

Claims

1. metallized film large value capacitor with good resistance to shock, by box (7), capacitance group in the box (7), the lead-out wire and the epoxy resin layer (6) between box (7) and the capacitance group that connect capacitance group constitute, it is characterized in that: described capacitance group composes in parallel capacitance group by a plurality of metallized film capacitor fuses or is formed through being connected in series by a plurality of described capacitance group again, is provided with heat-conducting medium layer (8) in the epoxy resin layer (6) of the metallized film capacitor fuse of capacitance group and epoxy resin layer intersection; Front end face at box (7) is provided with capping (10), and capping (10) is provided with the supporting pins (9) with the adjacent arrangement of lead-out wire.

2. the metallized film large value capacitor with good resistance to shock according to claim 1 is characterized in that: the front end face of box (7) is connected with capping (10) by cushion (11).