CN217280377U

CN217280377U - Coil structure of energy-saving frequency conversion transformer

Info

Publication number: CN217280377U
Application number: CN202123384157.3U
Authority: CN
Inventors: 潘海艳; 魏克普; 孙涛; 赵宏伟; 李振
Original assignee: Liaoning Huaye Group Development Co Ltd
Current assignee: Liaoning Huaye Group Development Co Ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-08-23
Anticipated expiration: 2031-12-29

Abstract

The utility model provides an energy-saving frequency conversion transformer's coil structure, frequency conversion transformer's low pressure coil structure include basic winding and phase shift winding, arrange from top to bottom phase shift winding and basic winding. The utility model is characterized in that: the phase-shifting winding comprises 2n wire cakes, each two adjacent wire cakes form a winding, the heads and the tails of n windings formed by the 2n wire cakes are respectively connected in parallel to form the output ends A1 and A2 of the phase-shifting winding of the coil together; the basic winding is a continuous coil structure formed by a plurality of wire cakes, and the head and the tail of the basic winding form output ends B1 and B2 of the basic winding of the coil. The utility model discloses improved frequency conversion transformer's low pressure coil structure, designed into different coiling structures respectively with basic winding and phase-shifting winding, phase-shifting winding changes multiunit parallel structure into by the continuous type coil, and basic winding still is continuous type coil structure, makes the whole electrical property of transformer good, simple process, material saving cost.

Description

Coil structure of energy-saving frequency conversion transformer

Technical Field

The utility model relates to an energy-saving transformer technical field, in particular to coil structure of energy-saving frequency conversion transformer.

Background

The existing frequency conversion transformer with a continuous structure and placed up and down has the disadvantages of complex winding process, poor mechanical strength, poor short-circuit resistance and high material cost.

Chinese patent publication No. CN 204407148U discloses a transformer with a double-pancake coil structure, which integrally adopts a double-pancake coil, and this design is suitable for conventional transformers and cannot be used in variable frequency transformers. A low-voltage coil of the variable-frequency transformer is provided with a basic coil and a phase-shifting coil, and a coil design aiming at an energy-saving structure of the variable-frequency transformer is needed.

Disclosure of Invention

In order to solve the technical problem that the background art provided, the utility model provides an energy-saving frequency conversion transformer's coil structure has improved frequency conversion transformer's low pressure coil structure, designs into different coiling structures with basic winding and phase shift winding respectively, and phase shift winding changes into the parallelly connected structure of multiunit by continuous type coil, and basic winding still is continuous type coil structure, makes the whole electrical property of transformer good, and simple process, material saving cost.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a low-voltage coil structure of an energy-saving frequency conversion transformer comprises a basic winding and a phase-shifting winding, wherein the phase-shifting winding and the basic winding are arranged up and down.

The utility model is characterized in that: the phase-shifting winding comprises 2n wire cakes, each two adjacent wire cakes form a winding, the heads and the tails of n windings formed by the 2n wire cakes are respectively connected in parallel to form output ends A1 and A2 of the phase-shifting winding of the coil; the basic winding is a continuous coil structure formed by a plurality of wire cakes, and the head and the tail of the basic winding form the output ends B1 and B2 of the basic winding of the coil.

Furthermore, the wire cake of each winding of the phase-shift winding is formed by winding a single transposed conductor.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the number of turns of the continuous wire cake of the original phase-shifting winding is an integer, which leads to radial high-speed line of the coil and poor filling coefficient, after the improvement design of the utility model, the radial high-speed line of the low-voltage winding is avoided, and the filling coefficient of the winding is good, thereby increasing the mechanical strength of the winding and improving the short-circuit resistance of the transformer; the winding process is simple, short circuit between the conductor strands is avoided, and the safety and reliability of the product are improved;

2) the turns of each screen of the basic winding are fractional turns and have no high radial line, so a continuous winding is still adopted, the winding method is simple, the operation is convenient, the mechanical performance is high, the heat dissipation performance is good, the welding points of the continuous winding are few, and the inter-turn working voltage is low;

3) after the design of the utility model is changed, the number of the low-voltage winding cakes is increased, the radial thickness is increased, the heat dissipation surface of the winding is increased, the temperature rise of the winding is reduced, and the transformer material is saved, thereby saving the manufacturing cost of the transformer;

4) the original continuous phase shifting coil structure has more parallel winding roots and larger lead section, the number of the changed coil cakes is increased, the total load flow is increased after the multiple cakes are connected in parallel, the number of the parallel winding roots of a single cake is reduced, the lead section is reduced, the operable space is increased, the lead is easy to connect, the construction difficulty is reduced, and the working hours are saved.

Drawings

Fig. 1 is a front view of a low-voltage coil structure of a frequency conversion transformer of the present invention;

fig. 2 is a top view of the low-voltage coil structure of the variable frequency transformer of the present invention;

FIG. 3 is a front view of a low-voltage coil structure of a frequency conversion transformer in the prior art;

FIG. 4 is a cross-sectional view of a phase shift winding wound wire of the prior art;

fig. 5 is a cross-sectional view of the phase-shift winding wire of the present invention.

In the figure: 1-wire cake 2-end ring 3-insulation partition 4-transposed conductor.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 3, the low-voltage coil structure of the frequency conversion transformer in the prior art includes a basic winding formed by a coil block (1) E and a phase-shifting winding formed by a coil block (1) D, both the basic winding and the phase-shifting winding are in a continuous coil structure mode, and the number of turns of the continuous coil block is an integer, which results in radial high-speed coil and poor filling factor.

As shown in fig. 1-2, the utility model discloses an energy-saving frequency conversion transformer's coil structure, frequency conversion transformer's low voltage coil structure include the basic winding that comprises line cake (1) E and the phase shift winding that comprises line cake (1) D1-D12, divide into upper and lower two sets of, cut off with insulating wall (3) between two sets of, the top and bottom still are equipped with end circle (2). The upper group comprises a basic winding-wire cake (1) E and a phase-shifting winding-wire cake (1) D1-D6, the lower group comprises the basic winding-wire cake (1) E and the phase-shifting winding-wire cake (1) D7-D12, the two groups have the same structure, and the phase-shifting winding and the basic winding are arranged up and down. The following description will be given by taking the above group as an example.

The phase-shifting winding of the upper group comprises 6 line cakes (1) D1-D6, every two adjacent line cakes (1) form a winding, three heads A1 and three tails B1 of 3 windings formed by the 6 line cakes (1) are respectively connected in parallel to form output ends A1 and A2 of the phase-shifting winding of the coil; the basic winding is a continuous coil structure formed by a plurality of wire cakes (1) E, and the head B1 and the tail B2 of the basic winding form the output ends B1 and B2 of the basic winding of the coil.

As shown in FIG. 4, in the design of the continuous coil of the original phase-shift winding, the wire cake is wound by two or more transposed conductors (4) and is wound in parallel. As shown in fig. 5, the improved multi-cake parallel phase-shifting winding of the present invention has a single transposed conductor (4) wound on a cake of each winding. The original continuous coil structure has more parallel winding number and larger lead section, the number of the changed coil cakes is increased, the total load flow is increased after the multiple cakes are connected in parallel, the number of the parallel winding of a single cake is reduced, the lead section is reduced, the operable space is increased, the lead connection is easy, the construction difficulty is reduced, and the working hours are saved.

After the design of the utility model is changed, the phase-shifting winding avoids the radial high line of the low-voltage winding, and the filling coefficient of the winding is good, thereby increasing the mechanical strength of the winding and improving the short-circuit resistance of the transformer; the winding process is simple, short circuit between the conductor strands is avoided, and the safety and reliability of the product are improved; the number of turns of each screen of the basic winding is fractional turns, and the radial direction is not high, so that a continuous winding is still adopted, the winding method is simple, the operation is convenient, the mechanical performance is high, the heat dissipation performance is good, the number of welding points of the continuous winding is small, and the inter-turn working voltage is low. The number of the low-voltage winding cakes is increased, the radial thickness is increased, the heat dissipation surface of the winding is increased, the temperature rise of the winding is reduced, and the transformer material is saved, so that the manufacturing cost of the transformer is saved. The number of coil cakes is increased, the number of parallel winding is reduced, the section of a lead wire is reduced, the operable space is increased, the lead wire is easy to connect, the construction difficulty is reduced, and the working hours are saved.

The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation and specific operation processes are given, but the protection scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.

Claims

1. A coil structure of an energy-saving frequency conversion transformer comprises a basic winding and a phase-shifting winding, wherein the phase-shifting winding and the basic winding are arranged up and down;

the phase-shifting winding is characterized by comprising 2n wire cakes, wherein every two adjacent wire cakes form a winding, the heads and the tails of n windings formed by the 2n wire cakes are respectively connected in parallel to form output ends A1 and A2 of the phase-shifting winding of the coil;

the basic winding is a continuous coil structure formed by a plurality of wire cakes, and the head and the tail of the basic winding form the output ends B1 and B2 of the basic winding of the coil.

2. The coil structure of an energy-saving frequency conversion transformer according to claim 1, wherein the coil cake of each phase shift winding is formed by winding a single transposed conductor.