CN201655478U

CN201655478U - Isolation transformer

Info

Publication number: CN201655478U
Application number: CN201020179346XU
Authority: CN
Inventors: 马英楠; 李建兵
Original assignee: TANGSHAN CREATIVEMIX ELECTRONICS CO Ltd
Current assignee: TANGSHAN CREATIVEMIX ELECTRONICS CO Ltd
Priority date: 2010-05-05
Filing date: 2010-05-05
Publication date: 2010-11-24
Anticipated expiration: 2020-05-05

Abstract

The utility model provides an isolation transformer which comprises a shell, an annular transformer contained in the shell and a guide needle extending out of the shell, wherein the shell adopts a metal shell; and a base, bonding glue for bonding the base and the annular transformer together and inert gas filled in the metal shell are arranged in the shell. The isolation transformer has the advantages of higher reliability, longer storage time and better high-frequency waveform parameters through being sealed by the metal shell.

Description

Isolating transformer

[technical field]

The utility model relates to a kind of isolating transformer, and it relates to a kind of isolating transformer with metal shell.

[background technology]

The MIL_STD_1553B bus standard is one of basis of the integrated and standardized management of U.S. Department of Defense's armament systems, be widely used in airplane synthetic avionics system, plug-in property management reason and integrated system, and progressively expand to fields such as flight system such as control and tank, naval vessel, space flight, it is used for airplane avionics system by USAF at first, be widely used in the US and European sea, land and sky army at present, and become a kind of international standard.The manufacturing process of 1553B bus device has satisfied variations in temperature and army's target requirement on a large scale. and be widely used in the middle of the project of severe rugged environment.This bus system is made up of bus, isolating transformer, terminal (receiver or reflector), isolation resistance, coupler (according to usable condition).Isolating transformer is that key is indispensable Primary Component.

The MIL-STD-1553B bus system is widely used in the military-civil weaponry of the U.S. and the space station, in satellite launch vehicle and the recipient, as long as use the MIL-STD-1553B bus that supporting with it pulse transformer of using as signal transmission, isolation, impedance matching that meets its standard will be arranged, common 1553B bus is the form that bakelite shell, epoxy glue perfusion seal with the packing forms of transformer.Though this packing forms can satisfy the Military Standards requirement, but because employing all is organic material, its storage cycle is shorter, can not satisfy the requirement of 30 years storage cycles of present military project, and owing to the epoxy glue and the bakelite shell of perfusion can produce the drift that mechanical stress causes electrical quantity to transformer when the variations in temperature, and the form of described bakelite shell, epoxy glue perfusion sealing also can influence the high frequency waveforms parameter.

In view of the above problems, be necessary to provide a kind of isolating transformer to solve above-mentioned deficiency.

[utility model content]

The technical problem that the utility model solved is to provide the novel isolation transformator that a kind of reliability is higher, storage cycle is longer.

For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of isolating transformer, it comprises shell, be contained in the described shell toroidal transformer and from the extended pin that draws of described shell, described shell is a metal shell, the bonded adhesives that be provided with a pedestal in it, described pedestal and described toroidal transformer is bonded together and be packed into inert gas in the described metal shell.

As the further improvement of the technical program, described isolating transformer also is provided with the described hermetic terminal that draws pin of plurality of fixed.

As the further improvement of the technical program, described hermetic terminal adopts the described pin that draws of glass elevated-temperature seal.

As the further improvement of the technical program, described isolating transformer also is provided with a metal cover board that is welded to connect with described metal shell.

Compared to prior art, isolating transformer described in the utility model carries out the mode of air-tight packaging by metal shell, makes isolating transformer have higher reliability and better performance.

[description of drawings]

Fig. 1 is the internal structure schematic diagram of isolating transformer described in the utility model.

[embodiment]

The utility model provide a kind of new packaging form, have high reliability more, have more premium properties and meet the military project three anti-MIL-STD-1553B bus isolating transformers 10 that require, this isolating transformer 10 not only satisfies the MIL-STD-1553B bus standard, also utilizing air-tightness metal shell 3 to seal, is Primary Component indispensable in the MIL-STD-1553 bus system.Isolating transformer 10 described in the utility model plays Fault Isolation and impedance matching in bus system, it comprises metal shell 3, hermetic terminal 2, draws pin 1, ring-shaped transformer 6, bonded adhesives 4, inert gas 7 and metal cover board 8.

Described metal shell 3 is accommodated described toroidal transformer 6 by the air-tight packaging mode; in order to make the internal and external pressure balance of metal shell 3; also for described toroidal transformer 6 being insulated and three anti-protections, also be added with inert gas 7 in the described metal shell 3 simultaneously.Therefore this isolating transformer 6 has better high frequency characteristics because adopted inert gas 7 to fill, and all is not more than the rise time of the waveform under requiring according to the MIL-STD-1553B bus standard and fall time 170ns.

Described hermetic terminal 2 adopts the glass elevated-temperature seal, and is arranged at the bottom of described metal shell 3, with the fixing described pin 1 that draws.

During assembling, elder generation's toroidal transformer 6 that coiling is good is packed into and is used hermetic terminal 2 elevated-temperature seals fixedly to draw in the metal shell 3 of pin 1, and the wire bonds of toroidal transformer 6 drawing on the pin 1 to correspondence; Perfusion bonded adhesives 4 (as epoxy glue or silicon gel) bonds to toroidal transformer 6 on the pedestal 5 in the metal shell 3 in metal shell 3 then, and this pedestal 5 is the expoxy glass material; After then metal shell 3 inside being evacuated, inject a certain amount of described inert gas 7; Adopt parallel seam welding to connect then a metal cover board 8 that is positioned at described metal shell 3 tops is carried out airtight sealing by fusing with described metal shell 3.

The utility model reliability is higher, performance parameter is better, can be widely used in adopting in the devices such as military, civil aircraft, satellite, ordnance missile of MIL-STD-1553B bus system, specifically, the utility model isolating transformer has following advantage with respect to the isolating transformer of prior art:

1. transformer is because adopt seldom organic material, therefore compares with transformer of the prior art to have the higher storage time.

2. transformer makes to have higher environment property on probation owing to adopt air-tightness metal shell packing forms, compares with transformer of the prior art to have higher anti-mechanical stress, the ability of temperature stress.

3. transformer has reduced the influence to the high frequency waveforms parameter owing to adopt air-tightness metal shell packing forms.

The above only is a most preferred embodiment of the present utility model, is not the utility model is done any pro forma restriction.Any those of ordinary skill in the art are not breaking away under the technical solutions of the utility model scope situation, utilize the method content of above-mentioned announcement that technical solutions of the utility model are made many possible changes and modification, all belong to the scope of claims protection.

Claims

1. isolating transformer, it comprises shell, be contained in the described shell toroidal transformer and from the extended pin that draws of described shell, it is characterized in that: described shell is a metal shell, the bonded adhesives that be provided with a pedestal in it, described pedestal and described toroidal transformer is bonded together and be packed into inert gas in the described metal shell.

2. isolating transformer according to claim 1 is characterized in that: described isolating transformer also is provided with the described hermetic terminal that draws pin of plurality of fixed.

3. isolating transformer according to claim 2 is characterized in that: described hermetic terminal adopts the described pin that draws of glass elevated-temperature seal.

4. isolating transformer according to claim 3 is characterized in that: described isolating transformer also is provided with a metal cover board that is welded to connect with described metal shell.