CN103021634A

CN103021634A - Rectangular-winding transformer

Info

Publication number: CN103021634A
Application number: CN 201110288349
Authority: CN
Inventors: 吴红平
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-26
Filing date: 2011-09-26
Publication date: 2013-04-03

Abstract

The invention relates to a rectangular-winding transformer, comprising a rectangular winding, wherein the rectangular winding comprises a low-voltage rectangular coil, a flux-leakage hollow channel and a high-voltage rectangular coil from inside to outside in sequence; the low-voltage rectangular coil and the high-voltage rectangular coil are packaged in epoxy resin; and an amorphous metal iron core is arranged in the rectangular winding to assemble a dual-winding transformer. According to the invention, the winding of the distribution transformer is rectangular and has the characteristics of low cost, low loss, small size, simple process and the like compared with the transformer with the common round winding; in order to meet indexes related to short-circuit impedance in transformer design, a simpler equation is adopted to calculate the short-circuit impedance of the distribution transformer with the rectangular winding, and when calculated to be improper, the short-circuit impedance can be regulated with methods of increasing the number of turns of winding of the transformer, increasing the average diameter of the winding, increasing inter-winding gaps, reducing design height of the winding and the like, so that inconvenience brought by only using experiments to check whether the short-circuit impedance meets a design standard and requirement or not is avoided.

Description

A kind of rectangle winding transformer

Technical field

The present invention relates to a kind of rectangle winding transformer.

Background technology

General transformer rectangle winding all is to do conglobately, and transformer iron-core piece needs multistage, and complex manufacturing technology and cost are high.

Chinese patent literature CN2459743 discloses a kind of core structure for three-phase oil-immersed non-crystalline transformer, it dwindles the width of coil with the square coil of indent by employing, and in alternate use insulating barrier insulation, thereby the width of iron core is shortened, realize reducing the consumption of amorphous alloy iron core.

Chinese patent literature CN2306556 discloses a kind of epoxy resin vacuum poured copper conductor square coil transformer, is comprised of iron core, high interior winding, castable, resin cushion block, arm-tie, clamping plate, suspension ring and pin.High, interior winding is rectangle, is sleeved on the iron core, and upper and lower clamping plate are fixed on arm-tie the both sides of iron core.

Chinese patent literature CN 2509696 discloses a kind of transformer, formed by iron core column, iron yoke and the coil that is enclosed within on the iron core column, the interior cross section of the interior loop of described coil is cydariform, the edge line of described cydariform cross section is the closed cydariform curve that is inscribed within rectangle, this closure cydariform curve is to be combined by the smooth curve of the smooth curve of outward bulge or outward bulge and local straight line, the ratio on boundary rectangle minor face and long limit is more than or equal to 0.5, be less than or equal to 0.9, cydariform curve and two cornerwise four intersection points of rectangle are positioned at the position outside the inner ellipse.

Chinese patent literature CN 2653655 discloses a kind of rectangular iron core/coil DVD dry transformer, and the iron core employing of transformer is cold rolling, the grain-oriented electrical silicon steel sheet is cut into slices as permeability magnetic material, and its cross section is rectangle; Interior loop adopts the paper tinsel winding construction, and its cross section is the rectangle with larger chamfering, adopts stay to support between interior loop and the iron core, to increase its anti-short circuit capability; Exterior loop places outside the interior loop, and its cross section is the rectangle with larger chamfering; It is MULTILAYER COMPOSITE insulating radiation air flue between the coil.

Chinese patent literature CN1244937 dry-type distribution transformer, comprise one basic for the coiling amorphous metal iron core of rectangle and one be the winding of the usefulness resin-encapsulated of rectangle substantially.Iron core has one substantially to be the iron core window of rectangle, and winding basically straight part just is in this window.After being assembled into distribution transformer, the shape of the shape of the basic flat segments of winding and iron core window matches.

Above-mentioned the deficiencies in the prior art part is, winding is rectangle, the short-circuit impedance of transformer can't calculate in the design of transformer, manufacture process, because the calculating of existing short-circuit impedance is all for circular winding, therefore for the transformer of rectangle winding, can only check short-circuit impedance whether to satisfy design standard and requirement according to experiment.Therefore, complicate fabrication process, cost is high, rate of finished products is low.

The equiva lent impedance of transformer input when the short-circuit impedance of transformer refers to that the load impedance of this transformer is zero.

Summary of the invention

The purpose of this invention is to provide a kind of rectangle winding transformer that can satisfy relevant short-circuit impedance index in the design of transformer.

Realize the rectangle winding transformer of the object of the invention, comprise a rectangle winding; The rectangle winding comprises the empty road of low pressure square coil, leakage field and the high pressure square coil that sets gradually from inside to outside; Described low pressure square coil and high pressure square coil encapsulate in epoxy resin; The amorphous metal iron core is located in the described rectangle winding, and is assembled into two winding transformer.

Realize the dry-type distribution transformer of the another kind of rectangle winding of the object of the invention, comprise the rectangle winding with a flat segments; The rectangle winding comprises and is provided with from inside to outside low-voltage coil and high-tension coil; Be wound on multilayer conductive material layer and insulation material layer on the rectangle coiling framework, each insulation material layer and electric conducting material are the rectangle concentric layer; Be provided with a plurality of cooling ducts between the neighboring concentric layer; The described rectangle winding of encapsulation is provided with the rectangle iron core window in the amorphous metal iron core in epoxy resin; The flat segments of described rectangle winding is in the described iron core window, and the flat segments of described winding and iron core window match, so that packaged described winding and amorphous metal iron core group are dressed up dry-type distribution transformer.

The present invention has positive effect: the winding of (1) this clearly demarcated distribution transformer is rectangle, for the transformer of typical circular winding, and the characteristics such as have that cost is low, loss is little, volume is little and technique is simple; For satisfying relevant short-circuit impedance index in the design of transformer, the present invention adopts better simply formula to calculate the short-circuit impedance of the distribution transformer of rectangle winding, calculating short-circuit impedance when improper, can adjust by methods such as the gap between the increase Transformer Winding number of turn or increase winding average diameter or increase winding or reduction Winding Design height, thereby avoided only checking by experiment short-circuit impedance whether to satisfy the inconvenience of design standard and requirement, simplify manufacture process, reduce cost, improved rate of finished products.(2) distribution transformer of this clearly demarcated rectangle winding has characteristics fire-retardant, explosion-proof, free from environmental pollution, can be installed in load center.Coil is nonhygroscopic.Iron core, folder is processed and can be moved in 100% relative humidity and other adverse circumstances through special process.Intermittent operation need not dehumidify.The lightning impulse level is high, and overload capacity is large.The type of cooling generally adopts the air natural cooling.

Embodiment

(embodiment 1)

The distribution transformer of the rectangle winding of the present embodiment comprises: a rectangle winding; The rectangle winding comprises the empty road of low pressure square coil, leakage field and the high pressure square coil that sets gradually from inside to outside; Described low pressure square coil and high pressure square coil encapsulate in epoxy resin; The amorphous metal iron core is located in the described rectangle winding, and is assembled into two winding transformer.

(embodiment 2)

The dry-type distribution transformer of the rectangle winding of the present embodiment comprises the rectangle winding with a flat segments; The rectangle winding comprises and is provided with from inside to outside low-voltage coil and high-tension coil; Be wound on multilayer conductive material layer and insulation material layer on the rectangle coiling framework, each insulation material layer and electric conducting material are the rectangle concentric layer; Be provided with a plurality of cooling ducts between the neighboring concentric layer; The described rectangle winding of encapsulation is provided with the rectangle iron core window in the amorphous metal iron core in epoxy resin; The flat segments of described rectangle winding is in the described iron core window, and the flat segments of described winding and iron core window match, so that packaged described winding and amorphous metal iron core group are dressed up dry-type distribution transformer.

Obviously, above-described embodiment only is for example of the present invention clearly is described, and is not to be restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all execution modes exhaustive.And these belong to apparent variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.

Claims

1. a rectangle winding transformer is characterized in that comprising: a rectangle winding; The rectangle winding comprises the empty road of low pressure square coil, leakage field and the high pressure square coil that sets gradually from inside to outside; Described low pressure square coil and high pressure square coil encapsulate in epoxy resin; The amorphous metal iron core is located in the described rectangle winding, and is assembled into two winding transformer.

2. a rectangle winding transformer is characterized in that comprising: the rectangle winding with a flat segments; The rectangle winding comprises and is provided with from inside to outside low-voltage coil and high-tension coil; Be wound on multilayer conductive material layer and insulation material layer on the rectangle coiling framework, each insulation material layer and electric conducting material are the rectangle concentric layer; Be provided with a plurality of cooling ducts between the neighboring concentric layer; The described rectangle winding of encapsulation is provided with the rectangle iron core window in the amorphous metal iron core in epoxy resin;

The flat segments of described rectangle winding is in the described iron core window, and the flat segments of described winding and iron core window match, so that packaged described winding and amorphous metal iron core group are dressed up dry-type distribution transformer.