CN202003816U

CN202003816U - Inverse transformer

Info

Publication number: CN202003816U
Application number: CN2011200755056U
Authority: CN
Inventors: 张伟; 郭跃光; 周杰
Original assignee: Jiangsu Sunel Transformer Co Ltd
Current assignee: Jiangsu Sunel Transformer Co Ltd
Priority date: 2011-03-22
Filing date: 2011-03-22
Publication date: 2011-10-05
Anticipated expiration: 2021-03-22

Abstract

The utility model discloses an inverse transformer, which comprises a transformer core, a reactor core, a primary coil and a secondary coil. The transformer core and the reactor core are separated by an insulation partition board and are fixed together by a bolt. The secondary coil winds round the transformer core. The transformer core wound with the secondary coil and the reactor core are integrated and the primary coil winds round the integrity. The reactor core comprises at least two sections and space is reserved in each section. The inverse transformer is high in efficiency, low in copper loss and saving in materials.

Description

Contravariant transformer

Technical field

The utility model relates to a kind of contravariant transformer.

Background technology

The conventional inversion transformer adopting be to be around with one group of low-voltage coil at transformer core, on iron core of electric reactor, be wound with reactor winding and then the two made the as a whole primary winding of coiling thereon, this structure realization can realize the effect that filtering and voltage, current transitions are pressed, but because many, the material usage of coil quantity causes greatly that transformer loss is big, efficient is low, temperature rise, the while makes that also cost is too high.

Summary of the invention

The purpose of this utility model is that the contravariant transformer that a kind of efficient height, copper loss are little, save material will be provided.

The utility model realizes that the technical scheme of above-mentioned purpose is, a kind of contravariant transformer, comprise transformer core, core of reactor, primary winding and secondary coil, separate by insulating press boards between described transformer core and core of reactor and be fixed together by core through screw rod, its innovative point is: described secondary coil is on transformer core, described transformer core and the core of reactor that is wound with secondary coil is around with primary winding as a whole and at it, described core of reactor has at least two sections, and has air gap between every section.

Described air gap is formed by the every intersegmental insulating board that is lined with of core of reactor.

The thickness of described insulating board is 3 ~ 7mm.

The utility model has reduced by one group of coil than original contravariant transformer in the periphery of transformer core, secondary coil as low-voltage coil on transformer core, described transformer core and the core of reactor that is wound with secondary coil is around with primary winding as a whole and at it, the primary winding here not only played transformer core high-tension coil effect but also play effect to the reactance coil of core of reactor, so not only saved material but also reduced the efficient that copper loss has improved contravariant transformer.The utility model according to electromagnetic induction principle owing to adopt reactor and two kinds of iron cores of transformer, make that inducing two voltages in the transformer primary winding is reactor voltage and transformer voltage, and in the transformer secondary coil, also induce the two resultant voltage, realized best-of-breed functionality.

Description of drawings

Fig. 1 is an iron-core coil arrangement schematic diagram of the present utility model;

Fig. 2 is the structural representation of core of reactor of the present utility model;

Fig. 3 is a schematic diagram of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is done and to be described in further detail.

As shown in Figure 1, 2, 3, a kind of contravariant transformer, comprise transformer core 1, core of reactor 2, primary winding 3 and

secondary coil

4,2 of described transformer core 1 and core of reactor separate by insulating press boards and are fixed together by core through screw rod, described secondary coil 4 is on transformer core 1, and described transformer core 1 and the core of reactor 2 that is wound with secondary coil 4 is around with primary winding 3 as a whole and at it.

As shown in Figure 2, described core of reactor 2 has at least two sections, and has air gap between every section.Certainly multistage preferably, inductance value just realizes than being easier to like this, has also reduced noise simultaneously.

Described air gap is formed by the every intersegmental insulating board that is lined with 6 of core of reactor 2.For the ease of the adjustment air gap, thus insulating board 6 used, thus adjust the size of air gap by the thickness of adjusting insulating board 6.Insulating board 6 is selected NOMEX paper for use.

The thickness of described insulating board 6 is 3 ~ 7mm.Be preferably 4mm, this is to come flexible according to required corresponding index.

Claims

1. contravariant transformer, comprise transformer core (1), core of reactor (2), primary winding (3) and secondary coil (4), separate by insulating press boards between described transformer core (1) and core of reactor (2) and be fixed together by core through screw rod, it is characterized in that: described secondary coil (4) is on transformer core (1), described transformer core (1) and the core of reactor (2) that is wound with secondary coil (4) is around with primary winding (3) as a whole and at it, described core of reactor (2) has at least two sections, and has air gap between every section.

2. contravariant transformer according to claim 1 is characterized in that: described air gap is formed by the every intersegmental insulating board that is lined with (6) of core of reactor (2).

3. contravariant transformer according to claim 2 is characterized in that: the thickness of described insulating board (6) is 3 ~ 7mm.