Power transformer with over-temperature protection

Abstract

The utility model belongs to the technical field of power transformers, particularly relates to a power transformer with an over-temperature protection function, and provides the following scheme aiming at the problem that the power transformer is easy to be damaged or has a fire risk due to overheating in the use process: the power transformer comprises a power transformer main body, a primary winding and a secondary winding of the power transformer main body are respectively used for connecting an input power supply and an output load, and an iron core of the power transformer main body is formed by laminating silicon steel sheets and is used for providing a magnetic circuit and reducing hysteresis and eddy-current loss. When the power transformer is used, heat generated in the operation process of the power transformer body is effectively reduced through the integrated cooling assembly, the overheating phenomenon is avoided, and therefore the operation stability and reliability of the power transformer are improved, and due to the introduction of the self-power-off assembly, a power source can be rapidly cut off when the temperature of the power transformer abnormally rises; safety accidents such as equipment damage or fire disasters caused by overheating are effectively prevented, and the safety performance of the equipment is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of power transformers, and particularly relates to a power transformer with over-temperature protection. Background Art

[0002] A power transformer is an electrical device mainly used to change the level of alternating voltage. It converts the input alternating voltage into the required output voltage through the principle of electromagnetic induction to meet the power requirements of different devices or systems. Power transformers are widely used in various electronic devices, household appliances, industrial equipment, and power systems. Currently, during the use of power transformers, they are prone to damage or fire risks due to overheating.

[0003] In view of the above problems, the present utility model document proposes a power transformer with over-temperature protection. Summary of the Utility Model

[0004] The utility model provides a power transformer with over-temperature protection, which solves the drawback that in the prior art, power transformers are prone to damage or fire risks due to overheating during use.

[0005] The utility model provides the following technical solutions:

[0006] A power transformer with over-temperature protection includes:

[0007] A power transformer main body, the primary winding and the secondary winding of the power transformer main body are respectively used to connect the input power supply and the output load, and the iron core of the power transformer main body is laminated by silicon steel sheets to provide a magnetic circuit and reduce hysteresis and eddy current losses;

[0008] A temperature reduction component is arranged on the power transformer main body to reduce the operating temperature of the power transformer main body and improve its operating stability;

[0009] An automatic power-off component is arranged on the power transformer main body to provide over-temperature protection for the power transformer main body and avoid damage or fire risks caused by overheating.

[0010] In a possible design, the temperature reduction component includes four cooling fans divided into two groups and arranged on both sides of the power transformer main body. The number of each group of cooling fans is two. Adjacent two cooling fans are fixedly connected by two connecting blocks. Four fixing rods are fixedly arranged at the four corners on one side of each group of cooling fans, and the other ends of the fixing rods are fixedly connected to the side wall of the power transformer main body.

[0011] In a possible design, the rotating shaft of the cooling fan penetrates through the outer wall of the mounting bracket and is fixedly provided with a transmission wheel. The same transmission belt is connected to adjacent transmission wheels in a transmission manner. One cooling fan in each group of cooling fans is electrically connected to the input power supply of the power transformer body through a wire.

[0012] In a possible design, the self-power-off component includes a thermal protector fixedly arranged on one side of the power transformer body and a temperature sensor used in a supporting manner. The thermal protector is connected in series in the power circuit.

[0013] In a possible design, a U-shaped mounting piece is fixedly arranged at the bottom of the power transformer body, and arc-shaped reserved holes for installation and fixation are provided at the four corners of the U-shaped mounting piece.

[0014] In a possible design, both the primary winding and the secondary winding of the power transformer body are wound with insulated copper wires.

[0015] In a possible design, an insulating coating made of phosphate material is coated on the silicon steel sheets in the power transformer body.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the present invention.

[0017] The working principle and usage process of this technical solution are as follows:

[0018] Before use, the power transformer body is firmly installed at the designated position through the U-shaped mounting piece and the arc-shaped reserved holes at its four corners. Then, the input end of the power transformer is connected to an external power supply, and the output end is connected to a load device. The power transformer body starts to work. The primary winding receives the input current. Through the magnetic circuit action of the iron core laminated by silicon steel sheets, an induced current is generated in the secondary winding to supply the load device.

[0019] As the power transformer body operates, the cooling component starts automatically. The four cooling fans are divided into two groups, with two in each group, located on both sides of the transformer body respectively. One of the cooling fans is electrically connected to the input power supply of the power transformer body through a wire and starts to rotate. Through the linkage of the transmission wheel and the transmission belt, it drives the other cooling fan in the same group to rotate, forming convective heat dissipation and effectively reducing the operating temperature of the transformer body.

[0020] The temperature sensor monitors the temperature of the power transformer body in real time and transmits the data to the thermal protector. When the monitored temperature exceeds the preset safety threshold, the thermal protector automatically acts to cut off the power circuit, causing the power transformer to stop working, thereby preventing damage or fire risk caused by overheating.

[0021] The present invention has the following beneficial effects:

[0022] The utility model effectively reduces the heat generated by the main body of the power transformer during operation by integrating a cooling component, avoids overheating, thereby improving its operation stability and reliability. The introduction of the power-off component enables the power transformer to quickly cut off the power when the temperature rises abnormally, effectively preventing safety accidents such as equipment damage or fire caused by overheating, and enhancing the safety performance of the equipment.

[0023] In the utility model, the cooling component adopts a grouped design. Two cooling fans in each group rotate synchronously through a transmission belt, forming a strong convective heat dissipation effect and significantly improving the heat dissipation efficiency.

[0024] In the utility model, an insulating coating made of phosphate material is coated on the silicon steel sheet in the main body of the power transformer, which not only enhances the insulation performance but also improves the heat resistance, further reducing the eddy current loss and enhancing the overall energy efficiency. The primary winding and the secondary winding are wound with insulated copper wires, which can withstand a larger current load, reduce the generation of heat at the same time, and extend the service life of the equipment. Description of the Drawings

[0025] Figure 1 It is a three-dimensional structural schematic diagram of a power transformer with over-temperature protection provided by an embodiment of the utility model;

[0026] Figure 2 It is a structural schematic diagram of another perspective of a power transformer with over-temperature protection provided by an embodiment of the utility model;

[0027] Figure 3 It is a structural schematic diagram of the cooling component of a power transformer with over-temperature protection provided by an embodiment of the utility model;

[0028] Figure 4 It is a structural schematic diagram of another perspective of the cooling component of a power transformer with over-temperature protection provided by an embodiment of the utility model.

[0029] Reference Signs: 1, main body of the power transformer; 2, U-shaped mounting piece; 3, arc-shaped reserved hole; 4, thermal protector; 5, temperature sensor; 6, cooling fan; 7, connecting block; 8, fixed rod; 9, transmission wheel; 10, transmission belt. Detailed Embodiment

[0030] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the utility model.

[0031] In the description of the present utility model, it should be understood that the terms "opening", "upper", "middle", "length", "inner", etc. indicating the orientation or positional relationship are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0032] In order to keep the following description of the embodiments of the present utility model clear and concise, the detailed descriptions of known functions and known components are omitted.

[0033] Embodiment 1

[0034] Please refer to Figures 1-4 , a power transformer with over-temperature protection, which is applied in the field of power transformers. It aims to ensure the efficient operation of the power transformer while effectively preventing damage or fire risks caused by overheating by integrating a cooling component and a self-power-off component, and includes:

[0035] The power transformer main body 1 is designed according to standards. Its core part is formed by laminating multiple layers of silicon steel sheets to form a strong and efficient magnetic circuit structure to reduce hysteresis and eddy current losses. In addition, the surface of the silicon steel sheets is specially coated with an insulating coating made of phosphate material. This design not only improves the insulation performance but also significantly enhances the heat resistance, further reducing the eddy current losses. The primary winding and secondary winding of the power transformer main body 1 are respectively carefully wound on the magnetic core, using high-purity insulated copper wire to ensure stable operation under high current loads while reducing heat generation;

[0036] To effectively control the operating temperature of the power transformer main body 1, two sets of cooling fans 6 are installed on each side. Each set contains two cooling fans 6, for a total of four. These cooling fans 6 are firmly connected by connecting blocks 7 to form a compact and efficient heat dissipation array. Fixed rods 8 are fixed at the four corners of each set of cooling fans 6, and the other ends of these fixed rods 8 are firmly connected to the side wall of the power transformer main body 1 to ensure that the cooling component is stable and does not shake during operation. The rotating shaft of the cooling fan 6 passes through the mounting frame and is equipped with a transmission wheel 9. Synchronous transmission is achieved between adjacent two transmission wheels 9 through a transmission belt 10. Only one cooling fan 6 needs to be connected to the input power supply, and the transmission mechanism can drive all the cooling fans 6 in this group to work synchronously to achieve efficient heat dissipation;

[0037] To prevent the power transformer from being damaged due to overheating, a thermal protector 4 (model KSD9700) and a temperature sensor 5 (model DS18B20) are integrated on one side of the power transformer body 1. The temperature sensor 5 monitors the operating temperature of the transformer in real time and transmits the data to the thermal protector 4. Once the temperature exceeds the preset safety threshold, the thermal protector will automatically cut off the power circuit and quickly stop the operation of the transformer, thus effectively avoiding potential dangers caused by overheating.

[0038] Embodiment 2

[0039] Based on Embodiment 1, the improvement is as follows:

[0040] Please refer to Figures 1-2 , for the convenience of installation and fixation, a U-shaped mounting plate 2 is provided at the bottom of the power transformer body 1. Four corners of this mounting plate are reserved with arc-shaped reserved holes 3, which are convenient for using bolts or other fasteners to firmly install it at the required position.

[0041] However, as is well known to those skilled in the art, the working principles and wiring methods of the power transformer body 1, the thermal protector 4, the temperature sensor 5 and the cooling fan 6 are common knowledge. They all belong to conventional means or well-known common sense, so they will not be elaborated here. Those skilled in the art can make arbitrary selections according to their needs or convenience.

[0042] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present utility model, and all of them should be covered by the protection scope of the present utility model; without conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A power transformer with over-temperature protection, characterized in that: include: A power transformer body (1), wherein the primary winding and the secondary winding of the power transformer body (1) are respectively used to connect an input power source and an output load, and the iron core of the power transformer body (1) is formed by stacking silicon steel sheets to provide a magnetic circuit and reduce hysteresis and eddy current losses; A cooling component is arranged on the power transformer body (1) and is used to reduce the operating temperature of the power transformer body (1) and improve its operating stability; The self-power-off component is arranged on the power transformer body (1) and is used to protect the power transformer body (1) from over-temperature, thereby avoiding damage or fire risk caused by overheating.

2. A power transformer with over-temperature protection according to claim 1, characterized in that: The cooling component comprises four cooling fans (6) divided into two groups and arranged on both sides of the power transformer body (1), each group of the cooling fans (6) having two fans, two adjacent cooling fans (6) being fixedly connected via two connecting blocks (7), and four corners of one side of each group of the cooling fans (6) being fixedly provided with fixing rods (8), the other end of the fixing rods (8) being fixedly connected to the side wall of the power transformer body (1).

3. A power transformer with over-temperature protection according to claim 2, characterized in that: The rotating shaft of the cooling fan (6) passes through the outer wall of the mounting frame and is fixedly provided with a transmission wheel (9); two adjacent transmission wheels (9) are connected to each other by a same transmission belt (10); and one cooling fan (6) in each group of cooling fans (6) is electrically connected to the input power supply of the power transformer body (1) through a wire.

4. A power transformer with over-temperature protection according to claim 1, characterized in that: The self-power-off component comprises a thermal protector (4) fixedly arranged on one side of a power transformer body (1) and a matching temperature sensor (5), wherein the thermal protector (4) is connected in series in a power circuit.

5. The power transformer with over-temperature protection according to claim 1, characterized in that: A U-shaped mounting plate (2) is fixedly arranged at the bottom of the power transformer body (1), and arc-shaped reserved holes (3) for mounting and fixing are arranged at the four corners of the U-shaped mounting plate (2).

6. A power transformer with over-temperature protection according to claim 1, characterized in that: The primary winding and the secondary winding of the power transformer body (1) are both wound from insulated copper wires.

7. The power transformer with over-temperature protection according to claim 1, characterized in that: The silicon steel sheets in the power transformer body (1) are coated with an insulating coating made of phosphate material.

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