Three-phase star connection irrigation type resonant transformer structure

Abstract

The utility model provides a three-phase star connection irrigation type resonant transformer structure which comprises a box body and a transformer assembly arranged in the box body. The transformer assembly comprises a plate body and three groups of transformer monomers fixedly connected with the plate body; each single transformer body comprises a magnetic core, an insulating sleeve arranged on the periphery of the magnetic core in a sleeving mode, a primary coil arranged on the periphery of the insulating sleeve in a winding mode and a secondary coil arranged on the periphery of the primary coil in a winding mode, insulating plates are arranged at the two ends of each insulating sleeve, and the insulating plates are arranged on the periphery of the magnetic core in a sleeving mode; the input end and the output end of the primary coil are respectively connected with a first terminal and a second terminal, the two ends of the secondary coil are respectively connected with a third terminal, the second terminal is conductively connected with the plate body, and the first terminals of the three groups of transformer monomers are respectively used for being electrically connected with three phase lines of a three-phase power supply. According to the utility model, through the three groups of transformer monomers in star connection, the service power is improved, and the hydrogen production efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production power supplies, and particularly relates to a three-phase star-connected irrigation type resonant transformer structure. Background Art

[0002] Electrolytic water hydrogen production is a method of decomposing water into hydrogen and oxygen using electrical energy. The working principle of the transformer in the electrolytic water hydrogen production equipment is based on the principle of electromagnetic induction. When the primary winding of the transformer is connected to an AC power supply, an alternating magnetic field will be generated in the winding. This alternating magnetic field will be conducted to the secondary winding through the magnetic core. Since the secondary winding is in the alternating magnetic field generated by the primary winding, according to the law of electromagnetic induction, an electromotive force will be induced in the secondary winding. The ratio of the number of turns of the secondary winding to the number of turns of the primary winding determines the magnitude of the output voltage of the secondary winding. If the number of turns of the secondary winding is more than that of the primary winding, the output voltage increases, which is called a step-up transformer; if the number of turns of the secondary winding is less than that of the primary winding, the output voltage decreases, which is called a step-down transformer. In the electrolytic water hydrogen production system, a step-down transformer is usually required to reduce the input higher voltage (such as the mains voltage) to a lower voltage suitable for the electrolytic cell to work.

[0003] In the prior art, a single-step-down transformer is generally used. When in use, multiple single transformers are connected in parallel and then used. At this time, although the power of the parallel use increases, the power loss is high, the power efficiency will decrease, and the hydrogen production efficiency will also decrease accordingly, and the hydrogen production cost is wasted. Summary of the Utility Model

[0004] Aiming at the defects in the prior art, the utility model provides a three-phase star-connected irrigation type resonant transformer structure to improve the hydrogen production efficiency.

[0005] To solve the above technical problems, a three-phase star-connected irrigation type resonant transformer structure provided by the utility model includes: a box body and a transformer assembly arranged in the box body; the transformer assembly includes a plate body and three groups of transformer monomers fixedly connected to the plate body; each transformer monomer includes a magnetic core, an insulating sleeve sleeved on the outer periphery of the magnetic core, a primary coil wound on the outer periphery of the insulating sleeve, and a secondary coil wound on the outer periphery of the primary coil. Insulating plates are arranged at both ends of the insulating sleeve, and the insulating plates are sleeved on the outer periphery of the magnetic core. A first terminal and a second terminal are respectively connected to the input end and the output end of the primary coil. Third terminals are connected to both ends of the secondary coil. The second terminal is electrically connected to the plate body. The first terminals of the three groups of transformer monomers are respectively used for electrical connection with the three phase lines of a three-phase power supply.

[0006] As can be seen from the above technical solutions, a three-phase star-connected irrigation resonant transformer structure provided by the present utility model has three second terminals on three single transformers all connected to the same board, while three first terminals of the three single transformers are respectively connected to three phase lines of a three-phase power supply to achieve the star connection of the transformer, effectively restricting zero-sequence current, reducing energy loss and heat generation, thereby improving the operating power of the transformer, and further being able to provide a larger current for the electrolytic cell. The increase in current intensity will accelerate the electrolytic reaction, enabling more water molecules to be decomposed into hydrogen and oxygen per unit time, thus improving the hydrogen production efficiency. Among them, the primary coil and the secondary coil are overlapped and wound, making the electromagnetic coupling closer, reducing the energy loss during transmission, enabling the transformer to better maintain the stability of the secondary output voltage, and the overlapping winding can reduce magnetic leakage, that is, the transformer monomer does not require an overly large magnetic core to confine the magnetic field, thereby reducing the volume of the transformer and facilitating the installation and layout of the electrolytic water equipment.

[0007] Preferably, the box body is potted with heat-conducting silica gel. The silica gel can fill the gap between the magnetic core and the box body, eliminate the air gap, ensure uniform heat transfer, and avoid local overheating; and the silica gel has good heat-conducting performance, which can quickly conduct the heat generated by the magnetic core to the box body, thereby effectively improving the heat dissipation efficiency and keeping the transformer operating within a suitable temperature range.

[0008] Preferably, protective sleeves are sleeved on the outer peripheries of the connections between the first terminal and the second terminal and the primary coil, and between the third terminal and the secondary coil. The protective sleeves are heat-shrinkable tubes. Setting protective sleeves at the connections can effectively prevent short circuits at the connections between the terminals and the coils, avoid current leakage, improve the safety and stability of the circuit, and also prevent external wear and corrosion.

[0009] Preferably, the magnetic core is in a rectangular frame shape and includes two U-shaped parts arranged opposite to each other. Insulating sleeves are sleeved on the outer peripheries of the joints of the two parts. The primary coil and the secondary coil are arranged from the inside to the outside on the outer peripheries of the two insulating sleeves.

[0010] Preferably, within the same transformer monomer, two groups of the first terminals are fixedly connected, two second terminals are fixedly connected, and the number of turns of the two groups of primary coils and the two groups of secondary coils are respectively the same. Using one terminal for two groups of primary coils on a single transformer monomer reduces the wiring complexity and also reduces the use of one terminal, thereby reducing costs; fewer connection points mean fewer potential failure points, thus improving the reliability and stability of the transformer during operation. And the same number of turns of the two kinds of coils is conducive to ensuring stable input and output voltages, balancing the current distribution, and reducing electromagnetic interference.

[0011] Preferably, a fixing band is also sleeved on the outer periphery of the transformer monomer, an adjusting part is arranged on the fixing band, and a limiting groove adapted to the fixing band is arranged on the insulating plate. The design of the fixing band can prevent the magnetic core in the transformer monomer from coming off, and the adjusting part is used to adjust the tightness of the fixing band.

[0012] Preferably, the plate body includes a connecting plate and a conductive plate. The connecting plate is fixedly connected to the box body, the conductive plate is fixedly connected to the connecting plate, and the second terminal is fixedly connected to the conductive plate.

[0013] Preferably, the conductive plate is made of copper, aluminum or silver.

[0014] Preferably, the box body is made of aluminum, copper, stainless steel or galvanized steel plate. Materials such as aluminum and copper have good electrical conductivity, can effectively shield the electromagnetic field generated by the magnetic core, reduce the interference of electromagnetic radiation to the surrounding circuits and equipment; moreover, these materials have good thermal conductivity, can help the magnetic core dissipate heat, reduce the temperature of the transformer during operation, increase the service life. Secondly, the aluminum material helps to optimize the magnetic field distribution, improve the electromagnetic coupling efficiency of the transformer, and thus improve the performance of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally denoted by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0016] Figure 1 FIG. 18 is a schematic perspective view of a three-phase star-connected irrigation resonant transformer structure provided by an embodiment of the present invention;

[0017] Figure 2 FIG. 22 is a cross-sectional view of a three-phase star-connected irrigation resonant transformer structure provided by an embodiment of the present invention;

[0018] Figure 3 FIG. 26 is a schematic structural view of a transformer monomer of a three-phase star-connected irrigation resonant transformer structure provided by an embodiment of the present invention;

[0019] Figure 4 FIG. 30 is a cross-sectional view of the magnetic core of a three-phase star-connected irrigation resonant transformer structure provided by an embodiment of the present invention

[0020] Figure 5 FIG. 34 is a schematic structural view of the magnetic core, insulating sleeve and insulating plate of a three-phase star-connected irrigation resonant transformer structure provided by an embodiment of the present invention.

[0021] Reference Signs:

[0022] 1 - Box body; 2 - Core; 3 - Insulating sleeve; 4 - Primary coil; 5 - Secondary coil; 6 - Insulating plate; 61 - Limiting groove; 7 - Third terminal; 8 - Fixing band; 801 - Adjusting part; 9 - Protective sleeve; 10 - Connecting plate; 11 - Conductive plate; 12 - First terminal; 13 - Second terminal. Detailed Embodiment

[0023] Hereinafter, embodiments of the technical solution of the present utility model will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, and thus are only examples and cannot be used to limit the protection scope of the present utility model.

[0024] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present utility model belongs.

[0025] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present utility model.

[0026] In this application, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In this application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0028] As Figures 1-5As shown, a three-phase star-connected irrigation resonant transformer structure provided in this embodiment includes a box body 1 and a transformer assembly disposed inside the box body 1. The box body 1 is potted with heat-conducting silicone. The silicone can fill the gap between the magnetic core and the box body, eliminate the air gap, ensure uniform heat transfer, and avoid local overheating. Moreover, the silicone has good heat-conducting performance and can quickly conduct the heat generated by the magnetic core to the box body, thereby effectively improving the heat dissipation efficiency and keeping the transformer operating within a suitable temperature range.

[0029] Specifically, the box body 1 is made of aluminum material. Since the aluminum material has good electrical conductivity, it can effectively shield the electromagnetic field generated by the magnetic core and reduce the interference of electromagnetic radiation on the surrounding circuits and equipment. Moreover, this material has good heat-conducting performance, can help the magnetic core dissipate heat, reduce the temperature of the transformer during operation, and increase the service life. Secondly, the aluminum material helps to optimize the distribution of the magnetic field, improve the electromagnetic coupling efficiency of the transformer, and thus enhance the performance of the transformer. In practical applications, the box body 1 can also be made of copper, stainless steel or galvanized steel sheet.

[0030] In this embodiment, the transformer assembly includes a plate body and three groups of transformer monomers fixedly connected to the plate body. Each transformer monomer includes a magnetic core 2, an insulating sleeve 3 sleeved on the outer periphery of the magnetic core 2, a primary coil 4 wound around the outer periphery of the insulating sleeve 3, and a secondary coil 5 wound around the outer periphery of the primary coil 4. Insulating plates 6 are provided at both ends of the insulating sleeve 3, and the insulating plates 6 are sleeved on the outer periphery of the magnetic core 2. The input end and the output end of the primary coil 4 are respectively connected with a first terminal 12 and a second terminal 13, and both ends of the secondary coil 5 are connected with a third terminal 7. The second terminals 13 of the primary coils 4 on the three groups of single transformers are all electrically connected to the same plate body, and the first terminals 12 of the three input ends of the primary coils 4 are respectively connected with the three phase lines of the three-phase power supply, thereby realizing the star connection of the transformer. The star-connected three groups of transformers can improve the power consumption and the hydrogen production efficiency. Among them, the magnetic core 2 is in a rectangular frame shape and includes two U-shaped parts arranged opposite to each other. Insulating sleeves 3 are sleeved on the outer periphery at the butt joint of the two parts. The primary coil 4 and the secondary coil 5 are arranged from the inside to the outside on the outer periphery of the two insulating sleeves 3, thereby realizing the overlapping winding of the primary coil 4 and the secondary coil 5, making the electromagnetic coupling closer, reducing the energy loss during the transmission process, enabling the transformer to better maintain the stability of the secondary output voltage, and the overlapping winding of the primary coil 4 and the secondary coil 5 can reduce the leakage magnetic field, that is, the single transformer does not require an overly large magnetic core to confine the magnetic field, so the volume of the transformer can be reduced, facilitating the installation and layout of the electrolytic water equipment.

[0031] Furthermore, protective sleeves 9 are sleeved on the outer peripheries of the connections between the first terminal 12 and the second terminal 13 and the primary coil 4, and on the outer periphery of the connection between the third terminal 7 and the secondary coil 5. The protective sleeve 9 is a heat-shrinkable tube, which can effectively prevent short circuits at the connections between the terminals and the coils, avoid current leakage, improve the safety and stability of the circuit, and also prevent external wear and corrosion.

[0032] Specifically, within the same transformer unit, the two first terminals 12 are fixedly connected, and the two second terminals 13 are fixedly connected, effectively reducing the complexity of wiring, reducing the use of one terminal, and lowering costs; fewer connection points mean fewer potential failure points, thus improving the reliability and stability of the transformer during operation. The number of turns of the two groups of primary coils 4 and the two groups of secondary coils 5 are respectively the same, which is beneficial to ensuring stable input and output voltages, balancing current distribution, and reducing electromagnetic interference.

[0033] In this embodiment, a fixing band 8 is sleeved outside the transformer unit. An adjusting portion 801 is provided on the fixing band 8 to facilitate adjusting the tightness of the fixing band 8 on the transformer unit and prevent the magnetic core within the transformer unit from coming loose. In addition, a limiting groove 61 adapted to the fixing band is provided on the insulating plate 6 to prevent the fixing band 8 from slipping off.

[0034] In this embodiment, the plate body includes a connecting plate 10 and a conductive plate 11 fixedly connected to the connecting plate 10. The connecting plate 10 is fixedly connected to the box body 1. The second terminal 13 at the output end of the primary coil 4 is fixedly connected to the conductive plate 11.

[0035] Specifically, the conductive plate 11 is made of copper. This material has good electrical conductivity, can efficiently transmit current, and can quickly dissipate heat to maintain the stable operation of the device.

[0036] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A three-phase star-connected irrigation resonant transformer structure, characterized in that: include: A box body (1) and a transformer assembly arranged in the box body (1); The transformer assembly includes a plate body and three groups of transformer monomers fixedly connected to the plate body; The transformer monomers each comprise a magnetic core (2), an insulating sleeve (3) sleeved on the outer periphery of the magnetic core (2), a primary coil (4) wound around the outer periphery of the insulating sleeve (3), and a secondary coil (5) wound around the outer periphery of the primary coil (4); both ends of the insulating sleeve (3) are provided with an insulating plate (6), the insulating plate (6) sleeved on the outer periphery of the magnetic core (2); the input end and the output end of the primary coil (4) are respectively connected to a first terminal (12) and a second terminal (13); both ends of the secondary coil (5) are connected to a third terminal (7); the second terminal (13) is conductively connected to the plate body; the first terminals (12) of the three groups of transformer monomers are respectively used to electrically connect to the three phase lines of a three-phase power supply.

2. A three-phase star-connected irrigation resonant transformer structure according to claim 1, characterized in that: The box body (1) is filled with heat-conducting silica gel.

3. A three-phase star-connected irrigation resonant transformer structure according to claim 1, characterized in that: The outer peripheries of the connection points between the first terminal (12) and the second terminal (13) and the primary coil (4), and the outer peripheries of the connection points between the third terminal (7) and the secondary coil (5) are both covered with protective sleeves (9), and the protective sleeves (9) are heat shrinkable tubes.

4. A three-phase star-connected irrigation resonant transformer structure according to claim 1, characterized in that: The magnetic core (2) is in the shape of a rectangular frame and comprises two U-shaped parts arranged opposite to each other, the insulating sleeves (3) are sleeved on the outer circumferences of the joints of the two parts, and the primary coils (4) and the secondary coils (5) are arranged on the outer circumferences of the two insulating sleeves (3) from the inside to the outside.

5. A three-phase star-connected irrigation resonant transformer structure according to claim 4, characterized in that: In the same transformer unit, the two first terminals are fixedly connected, the two second terminals are fixedly connected, and the number of turns of the two groups of primary coils (4) and the two groups of secondary coils (5) are respectively consistent.

6. A three-phase star-connected irrigation resonant transformer structure according to claim 1, characterized in that: A fixing belt (8) is also sleeved on the outer periphery of the transformer unit, an adjusting portion (801) is provided on the fixing belt (8), and a limiting groove (61) adapted to the fixing belt (8) is provided on the insulating plate (6).

7. The three-phase star-connected irrigation resonant transformer structure according to claim 1 is characterized in that: The plate body comprises a connecting plate (10) and a conductive plate (11), the conductive plate (11) being fixedly connected to the connecting plate (10), the connecting plate (10) being fixedly connected to the box body (1), and the second terminal (13) being fixedly connected to the conductive plate (11).

8. The three-phase star-connected irrigation resonant transformer structure according to claim 7 is characterized in that: The conductive plate (11) is made of copper, aluminum or silver.

9. The three-phase star-connected irrigation resonant transformer structure according to claim 1, characterized in that: The box body (1) is made of aluminum, copper, stainless steel or galvanized steel plate.

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