Double-coil transformer

Abstract

The utility model discloses a double coil transformer relates to transformer equipment field, including the iron core, the iron core is provided with the connecting hole in the transverse direction, the end portion of first screw rod outside the iron core is connected with the first clamping plate through the nut, the upper end of the iron core is provided with the second clamping plate that contacts with the first clamping plate, and the second clamping plate is provided with the second clamping plate. The second clamping plate is connected with the first clamping plate at the lower end through a second screw and a nut, a first coil and a second coil are wound around the left end of the iron core, a third coil and a fourth coil are wound around the right end of the iron core, and an insulating plate is arranged at the end, located outside the first clamping plate, of the first screw. According to the utility model, the input terminals are connected and rearranged, the second terminal and the third terminal which are adjacent to each other, or the first terminal and the second terminal, and the third terminal and the fourth terminal are connected through the short circuit piece, so that series connection or parallel connection can be realized, and the risk of cross connection of the connecting pieces is effectively avoided because the improved connecting terminals are located at adjacent positions.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer equipment, in particular to a double-coil transformer. Background Art

[0002] The voltage ranges vary greatly in different countries. For example, the main single-phase voltage in my country is 220V / 50Hz, and the main single-phase voltage in Japan is 110V / 60Hz. A 50Hz design transformer can cover the direct application of a 60Hz design transformer, but the voltage and current need to be converted. Conventional double-coil transformers achieve the purpose of changing the input rated voltage and current by changing the series / parallel connection on the input side. Usually, connecting one place can achieve the effect of series connection. Connecting two places can achieve the effect of parallel connection. At this time, the input is half the voltage of the series connection, the current carrying capacity is twice that of the series connection, and the total power capacity remains unchanged. When connected in parallel, the short-circuit needs to be crossed, and can only be short-circuited with a soft connection. The insulation strength at the intersection needs to be considered to prevent the risk of short circuit. In addition, the lengths of the short-circuit used in series and parallel are different. Two accessories need to be provided for customers to choose from, and customers are also prone to use them incorrectly. Utility Model Content

[0003] The utility model aims to provide a double-coil transformer to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A double-wire transformer comprises an iron core, wherein a connecting hole is opened in the transverse direction of the iron core, a first screw is passed through the connecting hole, a first clamping plate is connected to the end of the first screw outside the iron core through a nut, and is used to tightly clamp the iron core in the transverse direction, a second clamping plate in contact with the first clamping plate is arranged at the upper end of the iron core, the second clamping plate is connected to the first clamping plate at the lower end through a second screw and a nut, and is used to clamp the iron core in the vertical direction, a first coil and a second coil are wound around the left end of the iron core, and a third coil and a fourth coil are wound around the right end of the iron core, an insulating plate is arranged on one end of the first screw outside the first clamping plate, and a first terminal, a second terminal, a third terminal and a fourth terminal are arranged on the insulating plate in sequence from left to right, and the first terminal is electrically connected to the same-name end of the first coil, the second terminal is electrically connected to the same-name end of the third coil, the third terminal is electrically connected to the opposite-name end of the first coil, and the fourth terminal is electrically connected to the opposite-name end of the third coil, and adjacent terminals are connected by short-circuit pieces to achieve series or parallel connection.

[0006] Preferably, the iron core is a "mouth" shaped structure, the first clamping plate is located at the upper and lower ends of the iron core, the first coil and the third coil are respectively wound around the left and right ends of the iron core, and the second coil and the fourth coil are respectively wound around the outside of the first coil and the third coil.

[0007] Preferably, airway stays are provided on the sides of the first coil and the third coil that are in contact with the iron core, and airway stays are provided on the sides of the second coil and the fourth coil that are in contact with the first coil and the third coil, respectively.

[0008] Preferably, a support seat is provided at the lower end of the iron core, and the support seat is fixedly connected to the first clamping plate at the lower end.

[0009] Preferably, the second terminal and the third terminal are connected via a shorting piece to realize series connection, or the first terminal and the second terminal are connected via a shorting piece, and the third terminal and the fourth terminal are connected via a shorting piece to realize parallel connection.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model can realize series connection or parallel connection by rearranging the input terminal connection, connecting the adjacent second terminal and the third terminal, or connecting the first terminal and the second terminal, and the third terminal and the fourth terminal through a short-circuit piece. Since the improved connection terminals are in adjacent positions, the risk of cross-connection of the connectors is effectively avoided. At the same time, the distance between adjacent terminals is short, which saves wiring materials and optimizes material costs. Moreover, a short-circuit special for short-circuiting is used between two adjacent terminals, which further improves safety and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle A area;

[0014] Figure 3 This is a schematic diagram of the parallel operation of transformers of the utility model;

[0015] Figure 4 This is a transformer parallel circuit diagram of the utility model;

[0016] Figure 5 This is a schematic diagram of the series operation of the transformers of the utility model;

[0017] Figure 6 This is a transformer series circuit diagram of the utility model;

[0018] In the figure: 1 iron core, 2 first screw, 3 first clamping plate, 4 second clamping plate, 5 second screw, 6 second coil, 7 third coil, 8 fourth coil, 9 insulating plate, 10 first terminal, 11 second terminal, 12 third terminal, 13 fourth terminal, 14 airway stay, 15 support seat, 16 short-circuit piece. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-6 , the utility model provides a technical solution:

[0021] A double-wire transformer comprises an iron core 1, wherein the iron core 1 is provided with a connecting hole in the horizontal direction, a first screw rod 2 is passed through the connecting hole, and a first clamping plate 3 is connected to the end of the first screw rod 2 located outside the iron core 1 through a nut, so as to tightly clamp the iron core 1 in the horizontal direction. In the technical scheme of this embodiment, two groups of first screw rods 2 are arranged in the horizontal direction at the upper end of the iron core 1, and two groups are arranged at the lower end thereof. The first clamping plates 3 are symmetrically arranged on the front and rear sides of the iron core 1, and are arranged at both upper and lower ends of the iron core 1; a second clamping plate 4 in contact with the first clamping plate 3 is arranged in the horizontal direction at the upper end of the iron core 1, and the second clamping plate 4 is connected to the first clamping plate 3 at the lower end through second screw rods 5 and nuts at both ends, so as to clamp the iron core 1 in the vertical direction. Specifically, the upper end of the second screw rod 5 is connected to the end of the second clamping plate 4 through a nut and a gasket, and the lower end of the second screw rod 5 is threadedly connected to the connecting seat on the lower first clamping plate 3 through a thread;

[0022] The left end of the iron core 1 is wound with a first coil and a second coil 6, and the right end thereof is wound with a third coil 7 and a fourth coil 8. An insulating plate 9 is provided on one end of the first screw rod 2 located outside the first clamping plate 3, and a first terminal 10, a second terminal 11, a third terminal 12 and a fourth terminal 13 are sequentially provided on the insulating plate 9 from left to right, and the first terminal 10 is electrically connected to the same-name end of the first coil, the second terminal 11 is electrically connected to the same-name end of the third coil 7, the third terminal 12 is electrically connected to the opposite-name end of the first coil, and the fourth terminal 13 is electrically connected to the opposite-name end of the third coil 7. Adjacent terminals are connected by a short-circuit 16 to achieve series connection or parallel connection. Specifically, the second terminal 11 is connected to the third terminal 12 by the short-circuit 16 to achieve series connection, or the first terminal 10 is connected to the second terminal 11 by the short-circuit 16, and the third terminal 12 is connected to the fourth terminal 13 by the short-circuit 16 to achieve parallel connection;

[0023] A support seat 15 is provided at the lower end of the core 1, and the support seat 15 is fixedly connected to the first clamping plate 3 at the lower end;

[0024] It can be seen from the above structural description that by rearranging the input terminal connection, the adjacent second terminal 11 and the third terminal 12, or the first terminal 10 and the second terminal 11, the third terminal 12 and the fourth terminal 13 are connected through the short-circuit 16, so that series connection or parallel connection can be achieved. Since the improved connection terminals are in adjacent positions, the risk of cross-connection of the connectors is effectively avoided; at the same time, the distance between adjacent terminals is short, which saves wiring materials and optimizes material costs; and a short-circuit dedicated for short-circuiting is used between the adjacent two terminals, which further improves safety and convenience.

[0025] The iron core 1 is a "mouth" shaped structure, the first clamping plate 3 is located at the upper and lower ends of the iron core, the first coil and the third coil 7 are respectively wound on the left and right ends of the iron core 1, and the second coil 6 and the fourth coil 8 are respectively wound outside the first coil and the third coil 7;

[0026] An airway support bar 14 is provided on the side where the first coil and the third coil 7 are in contact with the iron core 1, and an airway support bar 14 is provided on the side where the second coil 6 and the fourth coil 8 are in contact with the first coil and the third coil 7 respectively. The advantage of such a configuration is that, by providing the airway support bar 14, airways for airflow are formed between the first coil and the third coil 7 and the iron core 1, and between the second coil 6 and the fourth coil 8 and the first coil and the third coil 7 respectively, which is beneficial to heat dissipation of the entire transformer.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-coil transformer, characterized in that: The invention comprises an iron core (1), wherein a connecting hole is provided in the transverse direction of the iron core (1), a first screw rod (2) is passed through the connecting hole, a first clamping plate (3) is connected to the end of the first screw rod (2) located outside the iron core (1) through a nut, and is used to tightly clamp the iron core (1) in the transverse direction, a second clamping plate (4) in contact with the first clamping plate (3) is provided at the upper end of the iron core (1), the second clamping plate (4) is connected to the first clamping plate (3) at the lower end through a second screw rod (5) and a nut, and is used to clamp the iron core (1) in the vertical direction, a first coil and a second coil (6) are wound around the left end of the iron core (1), and a third coil is wound around the right end (7) and a fourth coil (8), an insulating plate (9) is provided on one end of the first screw rod (2) located outside the first clamping plate (3), and the insulating plate (9) is provided with a first terminal (10), a second terminal (11), a third terminal (12) and a fourth terminal (13) from left to right, and the first terminal (10) is electrically connected to the same-name end of the first coil, the second terminal (11) is electrically connected to the same-name end of the third coil (7), the third terminal (12) is electrically connected to the opposite-name end of the first coil, and the fourth terminal (13) is electrically connected to the opposite-name end of the third coil (7), and adjacent terminals are connected by a short-circuit (16) to achieve series connection or parallel connection.

2. A double-coil transformer according to claim 1, characterized in that: The iron core (1) is of a "mouth"-shaped structure, the first clamping plate (3) is located at the upper and lower ends of the iron core, the first coil and the third coil (7) are respectively wound on the left and right ends of the iron core (1), and the second coil (6) and the fourth coil (8) are respectively wound outside the first coil and the third coil (7).

3. A double-coil transformer according to claim 2, characterized in that: An airway support bar (14) is provided on the side where the first coil and the third coil (7) are in contact with the iron core (1), and an airway support bar (14) is provided on the side where the second coil (6) and the fourth coil (8) are in contact with the first coil and the third coil (7), respectively.

4. A double-coil transformer according to claim 1, characterized in that: A support seat (15) is provided at the lower end of the iron core (1), and the support seat (15) is fixedly connected to the first clamping plate (3) at the lower end.

5. The double-coil transformer according to claim 1, characterized in that: The second terminal (11) and the third terminal (12) are connected via a short-circuit (16) to achieve series connection, or the first terminal (10) and the second terminal (11) are connected via a short-circuit (16), and the third terminal (12) and the fourth terminal (13) are connected via a short-circuit (16) to achieve parallel connection.

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