CN2634613Y

CN2634613Y - Pulse transformer

Info

Publication number: CN2634613Y
Application number: CN 03255272
Authority: CN
Inventors: 宫龙
Original assignee: ZHAOFU ELECTRONIC CO Ltd SHANGHAI
Current assignee: ZHAOFU ELECTRONIC CO Ltd SHANGHAI
Priority date: 2003-07-02
Filing date: 2003-07-02
Publication date: 2004-08-18
Anticipated expiration: 2013-07-02

Abstract

This utility model discloses a pulse transformer, which is characterized in that an upper lifting plate is fixed on a casing cover,two mounting panels are separately fixed on the two sides of the upper lifting plate, a lower lifing plate is laterally fixed in the point near to the middle of the two mounting panels, two iron cores are arranged on the lower part of the left and the right mounting panels, an air gap is left between the two iron cores which are provided with a left and a right coil; and this utility model adopts new CD-shaped strip iron cores with air gaps strung in, because the magnetic bias compensation circuit is cut off, the system fault caused by the damage of biasing diodes because of phenomenons like sparking will never appear, moreover, structural parts are simplified, as the number of the parts has been reduced to 18 from the original 42, and the production efficiency of the products has been improved, as compared with the manual winding mode of the original CD-shaped iron core, the mechanized winding mode adopted by the CD-shaped iron core can improve the production efficiency greatly.

Description

A kind of pulse transformer

Technical field:

The utility model relates to the technical field of transformer equipment, a kind of specifically pulse transformer.

Background technology:

Pulse modulator is the chief component of pulse radar transmistter, product lines such as this external nuclear physics, medical electronics, industry CT, container detection also are used widely, in modulator, extensively adopt the pulse transformer of various power levels, it mainly acts on is to raise or the reduction pulse voltage, set up the impedance matching between load and the modulator, change the polarity of output pulse, the DC potential between isolation signals source and the load is eliminated the DC component that may exist in the elementary winding.

Original pulse transformer is owing to be subjected to the restriction of relevant condition, adopt OD shape iron core to make, coil windings can only adopt artificial craft wear around, work production efficiency is extremely low, can not produce in batch, be the requirement of assurance dielectric voltage withstand on the structural design, on the assembly form of coil rack, adopt v-shaped structure, cause the various complexity of part, difficulty is installed, in circuit design because the hysteresis of the characteristic of magnetization-iron core of core material is the relevant technologies parameter request that guarantees pulse transformer, reduce residual magnetic flux density, adopted the magnetic bias compensating circuit in product circuit, string is incorporated inductance coil in the elementary problem of pulse transformer, capacitor and diode are promptly after direct impulse finishes, this iron core degaussing of electric capacity back discharge electric current, reduce residual magnetic flux density, and improve available magnetic flux density increment, but sort circuit is too complicated.

On structural design, the fixing employing of iron core is gone up lower plate and is fixedly clamped, and coil adopts assembly unit V-arrangement skeleton, for guaranteeing the accurate of relative position, between V-arrangement skeleton upper end and train wheel bridge, adopt the tenon form to fix, for guaranteeing the dielectric voltage withstand requirement, pulse transformer adopts the oil immersed type working method, so the sealing of pulse transformer core coil is assemblied in the container with fuel tank and case lid, but in the pulse modulator system, often cause high spark phenomenon and electric current and voltage surge spike etc. because of accidental factor, very easily cause this moment the pulse transformer bias diode to damage, cause pulse modulator and whole system normally not to move, and want that in high-pressure system it is unlikely avoiding accidental phenomenons such as high voltage arc and surge.

Summary of the invention:

The purpose of this utility model is to provide a kind of pulse transformer, and it can overcome some shortcomings of the prior art.

To achieve these goals, the technical solution of the utility model is: a kind of pulse transformer, it mainly comprises transformer-cabinet, be arranged on the case lid on transformer-cabinet top, be placed on iron core and coil in the fuel tank, it is characterized in that: be fixed with boatswain chair under the case lid, last boatswain chair both sides respectively are fixed with a mounting panel, two mounting panels are having boatswain chair near the center crosswise fixed, be equiped with an iron core at the left side mounting panel near lower end, also be equiped with an iron core at the right side mounting panel near lower end, between two iron cores air-gap arranged, on two iron cores, be respectively arranged with a left coil and a right coil.

The utility model has adopted novel C D shape strip iron core, in iron core, seal in air-gap, because removed the magnetic bias compensating circuit, therefore cause the system failure with regard to not existing because of phenomenons such as sparking cause bias diode to damage, have again, part simplifies the structure, the part item number reduces to present 18 from original 42, moreover, improved production efficiency of products, CD shape iron core can adopt mechanization row around mode, wears by hand around coming production efficiency to improve greatly compared with original OD shape iron core.

Description of drawings:

Fig. 1 is the prior art constructions schematic diagram

Fig. 2 is the utility model structural representation

Fig. 3 is the circuit theory diagrams of prior art

Fig. 4 is circuit theory diagrams of the present utility model

Embodiment:

The utility model will be further described below in conjunction with drawings and Examples.

The utility model mainly comprises transformer-cabinet 1, be arranged on the case lid 2 on transformer-cabinet top, be placed on iron core and coil in the fuel tank, it is characterized in that: be fixed with boatswain chair 3 under the case lid, last boatswain chair both sides respectively are fixed with a mounting panel 4, two mounting panels are having boatswain chair 5 near the center crosswise fixed, be equiped with an iron core 6 at the left side mounting panel near lower end, also be equiped with an iron core at the right side mounting panel near lower end, between two iron cores air-gap is arranged, on two iron cores, be respectively arranged with a left coil 7 and a right coil 8, this type of structure Design can significantly reduce the quantity that part is installed, reduced the difficulty of construction of installing, iron core is similar to and is CD shape, the iron core air-gap is 0.5mm～0.7mm, the coil turn of left coil and right coil is 40～50 circles, because after in iron core, sealing in air-gap, equivalence magnetic hysteresis loop permeability has reduced, and non-saturated region has been expanded, need corresponding reinforcement saturation magnetic field intensity, at selected core volume, corresponding adjustment increases coil turn after the parameters such as the length of magnetic path, be increased to 40～50 circles from 12 original circles, this iron core is a CD shape iron core, when the OD fabrication of iron core pulse transformer of original employing, the magnetic bias compensating circuit is absolutely necessary, after using CD shape iron core instead, in iron core, seal in air-gap, changed the iron core magnetic parameter, just there is no need to adopt the magnetic bias compensating circuit, thereby cancellation magnetic bias compensating circuit, simplified the pulse transformer circuit, after iron-core coil was realized CD shape structure, fit on iron core and boatswain chair just adopted the steel band banding, boatswain chair is being connected with case lid, iron-core coil is put into fuel tank, the part that simplifies the structure greatly, the part item number reduces to present 18 from original 42.

In the utility model accompanying drawing be labeled as train wheel bridge 9, lower plate 10, band ironcore choke 11 is prior art.

Claims

1, a kind of pulse transformer, it mainly comprises transformer-cabinet, be arranged on the case lid on transformer-cabinet top, be placed on iron core and coil in the fuel tank, it is characterized in that: be fixed with boatswain chair under the case lid, last boatswain chair both sides respectively are fixed with a mounting panel, two mounting panels are having boatswain chair near the center crosswise fixed, be equiped with an iron core at the left side mounting panel near lower end, also be equiped with an iron core at the right side mounting panel near lower end, between two iron cores air-gap is arranged, on two iron cores, be respectively arranged with a left coil and a right coil.

2, by the described a kind of pulse transformer of claim 1, it is characterized in that: iron core is approximate to be CD shape, and the iron core air-gap is 0.5mm～0.7mm.

3, by the described a kind of pulse transformer of claim 1, it is characterized in that: the coil turn of left coil and right coil is 40～50 circles.