CN2162702Y - Dry transformer - Google Patents

Abstract

The utility model discloses a dry transformer with small heat resistance, slow temperature rise and quick heat radiation. The utility model is composed of an iron core, winding coils and a casing. The utility model is characterized in that a heat conducting medium is filled in the contact part between the iron core and the casing, and the heat conducting medium is preferred to be heat conductive silicone grease material. The utility model can be widely used in the occasions which require the dry transformer with small heat resistance, slow temperature rise and quick heat radiation.

Description

Dry transformer

The utility model relates to a kind of power transformation transformer, especially a kind of dry-type transformer.

Existing dry-type transformer is made up of iron core, winding coil and housing, and iron core directly contacts with housing, owing to be subjected to the restriction of mechanical processing technique, have the space in the contact-making surface of iron core and housing, cause dry-type transformer when work temperature rise fast, thermal resistance is big, and radiating effect is bad.

The purpose of this utility model provides that a kind of thermal resistance is little, temperature rise is slow, the dry-type transformer of good heat dissipation.

Implementation of the present utility model is: dry-type transformer is made up of iron core, winding coil and housing, the heat-conducting medium of in the contact portion of iron core and housing, filling a vacancy, and heat-conducting medium preferably adopts heat conductive silicon grease material.Like this, space in the contact-making surface of iron core and housing is filled up by heat-conducting medium, during dry-type transformer work, the heat energy that the resistance loss of winding coil produces is passed to iron core, add the heat energy that the iron loss of iron core own is produced, can both pass to housing well by heat-conducting medium, housing outwards dispels the heat, reach that thermal resistance is little, temperature rise is fast, the effect of good heat dissipation, simultaneously again because reduced the temperature rise of dry-type transformer, improved radiating condition, thereby can reduce insulating requirements, and then reduced the volume weight and the manufacture difficulty of dry-type transformer winding coil.The utility model is implemented easily, and cost is low, and technology is easy, and is effective.

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

Fig. 1 is the schematic diagram of a kind of concrete structure of the utility model.

Fig. 2 is the partial enlarged drawing at Fig. 1 dry-type transformer A place.

With reference to Fig. 1, the dry-type transformer by iron core 1, winding coil 2 and metal shell 3 are formed is filled with heat-conducting silicone grease 4 in iron core 1 and metal shell 3 contact portions.With reference to Fig. 2, the space between iron core 1 and the metal shell 3 has been full of heat-conducting silicone grease 4.Heat energy on the iron core 1 is passed to metal shell 3 by heat-conducting silicone grease 4 preferably and is dispelled the heat, and it is little to play thermal resistance, the effect of rapid heat dissipation.

Claims (2)

1, a kind of dry-type transformer, by iron core 1, winding wire enclose 2, housing 3 forms, it is characterized in that in the contact portion of iron core 1 and housing 3, being filled with heat-conducting medium 4.

2,, it is characterized in that heat-conducting medium 4 adopts heat conductive silicon grease material according to the described dry-type transformer of claim 1.

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