CN2341250Y - R type core transformer for railway signals - Google Patents

Abstract

The utility model relates to a special-purpose transformer for railway signals. An iron core is in a slotted shape and without cutting circular cross section and the iron core is wound by silicon strips with high magnetic flux density; a primary coil and a secondary coil are respectively wound on the stems of the long straight segments of the both sides of the iron core. Compared with the existing similar products, the utility model has the advantages of small size, light weight, small magnetic leakage, small iron loss, small copper loss, low cost, good electric property, etc.

Description

The special-purpose R sections of railway signal core transformer

The utility model belongs to the railway power technical field of electrical equipment, relates to a kind of railway signal dedicated transformer.

Though the railway signal dedicated transformer is similar on the whole to other various types of transformers, on electrical characteristic requires, its special character is arranged.The dedicated transformer of this area used various models in railway signals equipment still is EI type blade inserting transformer and C sections core type transformer at present, the existing major defect of this series products is: 1, iron loss and copper loss are big, magnetic loss is big, efficient is low---and EI blade inserting transformer core is to be formed by stacking by a fairly large number of silicon steel sheet, be difficult for contact, the gap is big, magnetic loss is big, though the contact-making surface of C sections core is better than EI sections core, but contact-making surface gets rusty easily, and be subjected to that contact-making surface skew or iron core are fastening not firmly to cause magnetic loss excessive, influence transformer efficiency; In addition, the core section of this two classes transformer is a square, leakage field is arranged, otch is arranged, copper loss is big; 2, temperature rise, noise are big---because EI type blade inserting and C sections core type transformer all have the gap that varies in size at contact-making surface, thereby produce magnetic resistance, the transformer temperature rise increased, and produce harsh noise; 3, volume and weight is bigger than normal---and the winding turns of EI type blade inserting and C sections core type transformer is long, and the consumption copper material is many, and securing member is also a lot, has increased volume, has strengthened weight, has all brought inconvenience for I﹠M.

The purpose of this utility model is to overcome the defective that prior art exists, and a kind of special-purpose R sections of railway signal core transformer with superior electrical performance characteristics and structural behaviour characteristics is provided.

Be used to realize that the technical solution of foregoing invention purpose is such: the EI type blade inserting iron core and the C sections core that utilize R sections core to replace the railway signal traditional transformer to use, the nothing cutting circular section iron core of this transformer core for forming with the coiling of high magnetic flux density silicon strip, the profile of iron core is a Long Circle, is wound with primary coil and secondary coil respectively on the long and straight section stem stem on iron core both sides.

Below with reference to accompanying drawing the utility model content is described further.

Fig. 1 is the structural representation of a kind of specific embodiment of the utility model.

Fig. 2 is a core section schematic diagram among Fig. 1.

Fig. 3 is the basic principle schematic of this transformer.

As shown in the figure, the special-purpose R sections of this railway signal core transformer is made up of iron core 1 and former and deputy magnet exciting coil 2,3, iron core 1 is to be round nothing cutting iron core with the cross section that the high B of high-quality (magnetic flux density) silicon strip turns to, its profile can be a Long Circle, also can be that circular, rectangle or other are close-shaped; Primary coil 2 of transformer and secondary coil 3 are wound on respectively on the both sides stem stem of iron core 1.Coil winding process using string and way of combining are finished, and interlayer adds polyester film, add 0.5 cable paper between group and insulate, after coil winding finishes, lead-out wire must utilize flexible cord to isolate respectively and draws, and its purpose mainly is one anti-tampering, and two anti-swinging cross cause defective insulation.Consider suitable minefield, every transformer adopting double layer screen makes it have shockproof effect.During overall package, earlier transformer is fixed on the base plate, on base plate, fixes four root posts then, again shell is fixed on the column, add terminal board at last.

The electrical characteristic of this transformer requires:

Input AC 220V/25Hz; No-load current≤0.015A;

Floating voltage allows ± 5%; Full load secondary voltage value 〉=90%;

Impedance angle 〉=75%; Short-circuit voltage rate of change≤8%.

Compare with EI type blade inserting transformer and the C sections core type transformer of existing railway signal special use, R shaped iron core transformer described in the utility model has following advantage:

1, because the R shaped iron core is that the circular section does not have the cutting overall structure, its characteristic is not affected by the external environment, can be true Protect magnetic flux Ф m and do not change, so the long service life of product, and EI type blade inserting and C shaped iron core transformer hold Easily because of between inserted sheet or cut surface corrosion influencing characterisitic change;

2, R shaped iron core transformer leakage field is little, no-load current average specific EI type blade inserting and C sections core type transformer Low by about 30%, and efficient can improve about 20%, is a comparatively ideal energy-conserving product therefore;

3,, and is furnished with special-purpose skeleton because R sections core is not have the cutting overall structure with the circular section that high performance material is made.Gap between iron core and skeleton is little, and coil windings so just can be saved copper material than EI type and C sections core average turn length about 1/3;

4, the overall structure of R sections core transformer can be out of shape, and is not fragile, and EI type blade inserting silicon steel sheet utilization rate is lower, damages easily yet, though C sections core is not fragile, volume is big, price is also high, can not show a candle to R sections core from durable degree;

5, R sections core transformer has reduced clamping plate and relevant accessory because be overall structure, has so both saved Master Cost, has saved again and has processed and assemble man-hour, can improve work efficiency greatly;

6, the volume of R sections core transformer is little, in light weight, is convenient to maintenance and replacing, has alleviated maintenance personal's various burdens.

In sum, produce R sections core transformer, be that materials recruitment or cost price all will be lower than EI type blade inserting transformer and C sections core type transformer, in serviceability, but advantages such as loss is little, efficient is high, long conservation of power of life-span that R sections core transformer also has, therefore, R sections core transformer is the very desirable power transformer product of railway signal special use, is worth promoting.

Claims (2)

1, the special-purpose R sections of a kind of railway signal core transformer, it is characterized in that the nothing cutting circular section iron core of transformer core (1) for forming with the coiling of high magnetic flux density silicon strip, the profile of iron core (1) is a Long Circle, is wound with primary coil (2) and secondary coil (3) on the long and straight section stem stem on iron core (1) both sides respectively.

2, the special-purpose R sections of railway signal as claimed in claim 1 core transformer, the profile that it is characterized in that iron core (1) is circle or rectangle.

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