High-temperature-resistant transformer

Abstract

The utility model discloses a high-temperature-resistant transformer, belongs to the technical field of transformers, and solves the problems that the cooling effect caused by a single fan is still limited, and the transformer cannot be rapidly cooled under the condition of continuous high temperature. Comprising a base frame, a plurality of iron core windings arranged on the base frame, a heat conduction sleeve fixedly connected to the base frame and arranged on the outer rings of the iron core windings in a sleeving mode, and a plurality of fan sets fixedly connected to the base frame, a flow channel communicated with the heat conduction sleeve is formed in the base frame, and the fan sets guide air into the flow channel. And the temperature control circuit is coupled with the plurality of fan sets. The temperature sensor is used for detecting the temperature of the iron core winding and outputting a signal to the multi-stage voltage comparator, the comparator outputs a comparison signal to the control circuit according to a threshold value, and the control circuit sends out a control signal to activate the fan set, start the fan stage by stage, guide air to flow through the air channel and take away heat, so that rapid cooling of the transformer is achieved.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a high-temperature resistant transformer. Background Technology

[0002] A transformer is an electrical device that uses the principle of electromagnetic induction to change alternating current voltage. It consists of main components such as an iron core and windings, and often includes auxiliary components such as an oil tank, oil conservator, insulating bushings, and tap changers. The main functions of a transformer include voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization. In power systems, transformers are used not only to boost voltage to reduce transmission losses but also to reduce voltage to meet the power demands of different applications.

[0003] The core of a transformer is typically made of laminated silicon steel sheets and is the main component of its magnetic circuit. The windings are the electrical part of the transformer, made of insulated flat wire or enameled round wire. Transformers achieve voltage transformation through the turns ratio of the windings. When alternating current passes through the primary winding, it generates an alternating magnetic flux in the core, which in turn induces a voltage in the secondary winding.

[0004] Current transformers use fans to cool themselves down. However, conventional transformer fans typically operate at standard power. Even with power adjustments, using only a single fan for air cooling means that the cooling effect of a single fan is still limited and cannot achieve rapid cooling of the transformer under sustained high temperatures.

[0005] Therefore, a high-temperature resistant transformer is proposed to solve or alleviate the above problems. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-temperature resistant transformer.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A high-temperature resistant transformer includes a base frame, several iron core windings mounted on the base frame, a heat-conducting sleeve fixedly connected to the base frame and fitted around the outer ring of the iron core windings, and several fan units fixedly connected to the base frame. The base frame has a flow channel communicating with the heat-conducting sleeve, and the fan units guide air into the flow channel. The transformer also includes a temperature control circuit coupled to the fan units. The temperature control circuit collects the temperature of the iron core windings and controls the operation of the fan units.

[0009] Preferably, the inner wall of the heat-conducting sleeve abuts against the outer peripheral wall of the iron core winding, and an air passage communicating with the flow channel is formed between the inner wall of the heat-conducting sleeve and the outer peripheral wall of the iron core winding.

[0010] Preferably, the temperature control circuit includes

[0011] A temperature sensor, which collects the temperature of the iron core winding and outputs a temperature signal;

[0012] A multi-stage voltage comparison circuit is provided, wherein the output terminal of the temperature sensor is coupled to the input terminal of the multi-stage voltage comparison circuit, and the multi-stage voltage comparison circuit receives the temperature signal, compares it within multiple threshold intervals, and outputs the corresponding comparison signal.

[0013] The control circuit has its output terminal coupled to the input terminal of the multi-stage voltage comparison circuit. The output terminal of the control circuit is coupled to each wind turbine unit through various switching circuits. In response to the corresponding comparison signal, the control circuit controls the switching circuit coupled to the corresponding wind turbine unit to be energized.

[0014] Preferably, the plurality of fan units include a first fan unit, a second fan unit, a third fan unit, a fourth fan unit, a fifth fan unit, and a sixth fan unit, and the plurality of switching circuits include a first switching circuit, a second switching circuit, a third switching circuit, a fourth switching circuit, a fifth switching circuit, and a sixth switching circuit.

[0015] Preferably, the control circuit includes an integrated circuit of an STM32F103RCT6 embedded microcontroller.

[0016] Preferably, the first switching circuit, the second switching circuit, the third switching circuit, the fourth switching circuit, the fifth switching circuit, and the sixth switching circuit all include transistor switching circuits.

[0017] Preferably, the multi-stage voltage comparison circuit includes a first voltage comparator, a second voltage comparator, a third voltage comparator, a fourth voltage comparator, a fifth voltage comparator, and a sixth voltage comparator. The output terminals of the first, second, third, fourth, fifth, and sixth voltage comparators are all coupled to the output terminal of the control circuit. The negative input terminals of the first, second, third, fourth, fifth, and sixth voltage comparators are all coupled to the output terminal of the temperature sensor. The positive input terminals of the first, second, third, fourth, fifth, and sixth voltage comparators are connected to resistor groups of different resistance values ​​before being powered on.

[0018] This utility model has the following beneficial effects:

[0019] In practical application, the temperature sensor equipped with this invention can monitor the temperature change of the iron core winding in real time through its probe and convert the detected temperature data into an electrical signal output. This electrical signal is then sent to a multi-stage voltage comparison circuit, which contains six voltage comparators in successive stages. The negative input terminal of each comparator receives this temperature signal, while the positive input terminal is connected to a group of resistors with different resistance values ​​to form its own unique threshold. Thus, when the temperature signal passes through these comparators with different threshold values, it will output a corresponding comparison signal according to its value. These comparison signals are then transmitted to the control circuit, which issues corresponding control commands based on the received signals. These commands are transmitted to the first to sixth switching circuits through the output terminal of the control circuit, thereby triggering the start of the corresponding first to sixth fan units to achieve the cooling function. Since the threshold values ​​of the voltage comparators are set incrementally, the fan units will start sequentially in a preset order, ensuring a gradual enhancement of the cooling process. As the fan units start one by one, they will guide the airflow through the flow channel and then through the air passage to effectively remove the heat generated by the iron core winding. This process not only improves the heat dissipation efficiency of the transformer, but also achieves rapid cooling, ensuring the stable operation of the transformer in high-temperature environments. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a structural block diagram of the present invention;

[0023] Figure 3 This is the wiring diagram of the multi-stage voltage comparison circuit in this utility model.

[0024] 1. Base frame; 2. Heat-conducting jacket; 3. First fan unit; 4. Second fan unit; 5. Third fan unit; 6. Fourth fan unit; 7. Fifth fan unit; 8. Sixth fan unit; 9. Temperature sensor; 10. Multi-stage voltage comparison circuit; 11. Control circuit; 12. First switching circuit; 13. Second switching circuit; 14. Third switching circuit; 15. Fourth switching circuit; 16. Fifth switching circuit; 17. Sixth switching circuit. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] A high-temperature resistant transformer, such as Figure 1As shown, the device includes a base frame 1, several iron core windings mounted on the base frame 1, a heat-conducting sleeve 2 fixedly connected to the base frame 1 and fitted around the outer ring of the iron core windings, and several fan units fixedly connected to the base frame 1. The base frame 1 has a flow channel communicating with the heat-conducting sleeve 2. The fan units guide air into the flow channel. The inner wall of the heat-conducting sleeve 2 abuts against the outer peripheral wall of the iron core windings. An air passage communicating with the flow channel is formed between the inner wall of the heat-conducting sleeve 2 and the outer peripheral wall of the iron core windings. The device also includes a temperature control circuit, which is coupled to the fan units. The temperature control circuit collects the temperature of the iron core windings and controls the operation of the fan units.

[0032] like Figure 2 and Figure 3 As shown, the temperature control circuit includes a temperature sensor 9, a multi-stage voltage comparison circuit 10, and a control circuit 11.

[0033] Temperature sensor 9 collects the temperature of the iron core winding and outputs a temperature signal; the output terminal of temperature sensor 9 is coupled to the input terminal of multi-stage voltage comparison circuit 10. After receiving the temperature signal, multi-stage voltage comparison circuit 10 compares it within multiple threshold intervals and outputs the corresponding comparison signal; the output terminal of multi-stage voltage comparison circuit 10 is coupled to the input terminal of control circuit 11. The output terminal of control circuit 11 is coupled to each fan unit through various switching circuits. After responding to the corresponding comparison signal, control circuit 11 controls the switching circuit coupled to the corresponding fan unit to be energized; several fan units include first fan unit 3, second fan unit 4, third fan unit 5, fourth fan unit 6, fifth fan unit 7, and sixth fan unit 8; several switching circuits include first switching circuit 12, second switching circuit 13, third switching circuit 14, fourth switching circuit 15, fifth switching circuit 16, and sixth switching circuit 17; control circuit 11 includes an STM32F103RCT6 embedded microcontroller integrated circuit; the first switching circuit... Switching circuits 12, 13, 14, 15, 16, and 17 all include transistor switching circuits. The multi-stage voltage comparison circuit 10 includes a first voltage comparator, a second voltage comparator, a third voltage comparator, a fourth voltage comparator, a fifth voltage comparator, and a sixth voltage comparator. The outputs of all six voltage comparators are coupled to the output of the control circuit 11. The negative inputs of all six voltage comparators are coupled to the output of the temperature sensor 9. The positive inputs of all six voltage comparators are connected to resistor groups of different resistance values ​​before being powered on.

[0034] In practical application, the temperature sensor 9 can detect the temperature of the iron core winding through its probe, and outputs a temperature signal. This temperature signal is sent to the multi-stage voltage comparison circuit 10. The negative input terminals of the first, second, third, fourth, fifth, and sixth voltage comparators in the multi-stage voltage comparison circuit 10 can receive the temperature signal. Since the positive input terminals of the first, second, third, fourth, fifth, and sixth voltage comparators are connected to resistor groups of different resistance values, the threshold values ​​of each voltage comparator are different. The temperature signal is then compared within multiple threshold ranges, and a corresponding comparison signal is output. After the corresponding comparison signal is sent to the control circuit 11, the control circuit 11 can output a corresponding control signal. The signal is coupled from the output terminal of the corresponding control circuit 11 and then sent to the first switch circuit 12, the second switch circuit 13, the third switch circuit 14, the fourth switch circuit 15, the fifth switch circuit 16, or the sixth switch circuit 17. This causes the first fan group 3, the second fan group 4, the third fan group 5, the fourth fan group 6, the fifth fan group 7, or the sixth fan group 8 to start working. Since the threshold values ​​of the first voltage comparator, the second voltage comparator, the third voltage comparator, the fourth voltage comparator, the fifth voltage comparator, and the sixth voltage comparator increase step by step, the first fan group 3, the second fan group 4, the third fan group 5, the fourth fan group 6, the fifth fan group 7, and the sixth fan group 8 can work one by one. This allows the fan group to guide air into the flow channel and then blow it through the air channel, so that the heat on the iron core winding is carried away by the air, thereby completing the rapid cooling of the transformer.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-temperature resistant transformer, characterized in that, The device includes a base frame (1), several iron core windings mounted on the base frame (1), a heat-conducting sleeve (2) fixedly connected to the base frame (1) and fitted around the outer ring of the iron core windings, and several fan units fixedly connected to the base frame (1). The base frame (1) has a flow channel communicating with the heat-conducting sleeve (2). The fan units guide air into the flow channel. The device also includes a temperature control circuit, which is coupled to the fan units. The temperature control circuit collects the temperature of the iron core windings and controls the operation of the fan units. The temperature control circuit includes Temperature sensor (9), the temperature sensor (9) collects the temperature of the iron core winding and outputs a temperature signal; The multi-stage voltage comparison circuit (10) is coupled to the input of the temperature sensor (9). After receiving the temperature signal, the multi-stage voltage comparison circuit (10) compares the signals in multiple threshold ranges and outputs the corresponding comparison signals. The output terminal of the multi-stage voltage comparison circuit (10) is coupled to the input terminal of the control circuit (11). The output terminal of the control circuit (11) is coupled to each wind turbine unit through each switching circuit. The control circuit (11) controls the switching circuit coupled to the corresponding wind turbine unit to be energized after responding to the corresponding comparison signal.

2. A high-temperature resistant transformer according to claim 1, characterized in that, The inner wall of the heat-conducting sleeve (2) abuts against the outer peripheral wall of the iron core winding, and an air passage communicating with the flow channel is formed between the inner wall of the heat-conducting sleeve (2) and the outer peripheral wall of the iron core winding.

3. A high-temperature resistant transformer according to claim 1, characterized in that, The plurality of said fan units include a first fan unit (3), a second fan unit (4), a third fan unit (5), a fourth fan unit (6), a fifth fan unit (7), and a sixth fan unit (8), and the plurality of said switching circuits include a first switching circuit (12), a second switching circuit (13), a third switching circuit (14), a fourth switching circuit (15), a fifth switching circuit (16), and a sixth switching circuit (17).

4. A high-temperature resistant transformer according to claim 1, characterized in that, The control circuit (11) includes an integrated circuit of an STM32F103RCT6 embedded microcontroller.

5. A high-temperature resistant transformer according to claim 3, characterized in that, The first switch circuit (12), the second switch circuit (13), the third switch circuit (14), the fourth switch circuit (15), the fifth switch circuit (16), and the sixth switch circuit (17) all include transistor switch circuits.

6. A high-temperature resistant transformer according to claim 1, characterized in that, The multi-stage voltage comparator circuit (10) includes a first voltage comparator, a second voltage comparator, a third voltage comparator, a fourth voltage comparator, a fifth voltage comparator, and a sixth voltage comparator. The output terminals of the first voltage comparator, the second voltage comparator, the third voltage comparator, the fourth voltage comparator, the fifth voltage comparator, and the sixth voltage comparator are all coupled to the output terminal of the control circuit (11). The negative input terminals of the first voltage comparator, the second voltage comparator, the third voltage comparator, the fourth voltage comparator, the fifth voltage comparator, and the sixth voltage comparator are all coupled to the output terminal of the temperature sensor (9). The positive input terminals of the first voltage comparator, the second voltage comparator, the third voltage comparator, the fourth voltage comparator, the fifth voltage comparator, and the sixth voltage comparator are connected to resistor groups of different resistance values ​​and then powered on.

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