Transformer with over-current, over-voltage and over-temperature protection functions
By installing a thermistor in the primary winding of the transformer, overcurrent, overvoltage, and overtemperature protection can be achieved, solving the problem of transformer damage caused by grid voltage fluctuations and improving the safety and reliability of the transformer.
Patent Information
- Application Number
- CN202520087121.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-14
AI Technical Summary
Existing transformers are prone to burnout due to overcurrent, overvoltage, and overtemperature when the grid voltage fluctuates, and lack effective protection mechanisms.
A thermistor is installed in the primary winding of the transformer to provide overcurrent, overvoltage, and overtemperature protection, thus preventing damage to the transformer.
This effectively prevents transformers from being damaged by overcurrent, overvoltage, and overtemperature, thus improving the safety and reliability of transformers.
Smart Images
Figure CN223842745U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer manufacturing technology, and in particular to a transformer with overcurrent, overvoltage and overtemperature protection functions. Background Technology
[0002] The mains voltage fluctuates by about 20%. In many places, due to cost considerations, voltage regulators are not added to the electrical front end for voltage stabilization. When the mains voltage is too high, the transformer input will experience overvoltage, and the current will also increase with the voltage increase. The transformer's own temperature will also increase with the current increase. When the transformer temperature reaches a certain level, the transformer will burn out. Utility Model Content
[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a transformer with overcurrent, overvoltage, and overtemperature protection functions, which can prevent the transformer from burning out under overtemperature, overcurrent, and over-temperature conditions.
[0004] A transformer with overcurrent, overvoltage, and overtemperature protection functions according to an embodiment of the present invention includes:
[0005] magnetic core;
[0006] The winding is wound on the outer surface of the magnetic core. The winding includes a primary winding and a secondary winding. The primary winding is connected to the secondary winding. The primary winding is provided with a thermistor, which increases the resistance of the winding.
[0007] A frame is symmetrically arranged on both sides of the winding and connected to the winding. The frame is used to fix the winding and the magnetic core.
[0008] According to some embodiments of the present invention, the surface of the winding is wound with insulating tape.
[0009] According to some embodiments of the present invention, the frame includes a first frame and a second frame, wherein the first frame is disposed on the side of the primary winding away from the secondary winding, and the second frame is disposed on the side of the secondary winding away from the primary winding.
[0010] According to some embodiments of the present invention, both the first frame and the second frame are provided with pins. The first frame is also provided with a plurality of wire hanging pins and wire routing grooves. The pins are provided on one side of the first frame and the second frame, and the wire hanging pins are provided on the outside of the first frame. The wire hanging pins are used to support the winding of the winding, and the pins are used to fix the winding.
[0011] According to some embodiments of the present invention, multiple silicon steel sheets are stacked on the outer sides of the first frame and the second frame.
[0012] According to some embodiments of the present invention, the first frame is provided with a first extending plane, the second frame is provided with a second extending plane, and both the first extending plane and the second extending plane are provided with a first protrusion and a second protrusion. The first extending plane and the second extending plane are used to place the silicon steel sheet, and the first protrusion and the second protrusion are used to limit the silicon steel sheet.
[0013] According to some embodiments of the present invention, the first frame and the second frame are further provided with a third protrusion and a fourth protrusion, which are used to limit the first frame and the second frame.
[0014] According to some embodiments of the present invention, the winding is further wound with enameled wire.
[0015] The transformer with overcurrent, overvoltage, and overtemperature protection functions according to the embodiments of this utility model has at least the following beneficial effects:
[0016] The transformer comprises a magnetic core and a winding, which is wound around the outer surface of the core. The winding includes a primary winding and a secondary winding, which are connected together. A thermistor is installed in the primary winding to increase its resistance. A frame is symmetrically arranged on both sides of the winding and connected to it. The frame is used to fix the winding and the magnetic core. According to the technical solution of this embodiment, by setting a thermistor at the input end of the transformer winding, the transformer can be protected against overcurrent, overvoltage, and overtemperature under power grid fluctuations, thus preventing the transformer from burning out due to overcurrent, overvoltage, and overtemperature.
[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0019] Figure 1 This is a schematic diagram of the overall structure of a transformer with overcurrent, overvoltage, and overtemperature protection functions according to an embodiment of the present utility model;
[0020] Figure 2 This is a schematic diagram of the transformer circuit according to an embodiment of the present invention;
[0021] Figure 3 This is a schematic diagram of the skeleton structure of an embodiment of the present utility model;
[0022] Figure 4 This is a schematic diagram of the structure of the hanging nail, the wiring channel, and the pin in an embodiment of this utility model;
[0023] Figure 5 This is a structural schematic diagram of the first extending plane, the first protrusion, and the second protrusion in an embodiment of the present utility model;
[0024] Figure 6 This is a schematic diagram of the structure of the second extending plane, the third protrusion, and the fourth protrusion in an embodiment of the present utility model. Detailed Implementation
[0025] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0028] Reference Figure 1 and Figure 2 This utility model embodiment provides a transformer with overcurrent, overvoltage, and overtemperature protection functions, including a magnetic core (not shown in the figure); a winding 100, which is wound on the outer surface of the magnetic core, the winding 100 including a primary winding 110 and a secondary winding 120, the primary winding 110 and the secondary winding 120 being connected, the primary winding 110 being provided with a thermistor R1, the thermistor R1 increasing the resistance of the winding 100; and a frame 200, which is symmetrically arranged on both sides of the winding 100 and connected to the winding 100, the frame 200 being used to fix the winding 100 and the magnetic core.
[0029] It should be noted that by connecting a PTC thermistor R1 in series with the primary winding 110 of the transformer, the transformer can be protected against overcurrent, overvoltage, and overtemperature under grid fluctuations, preventing the transformer from burning out in these situations. Specifically, when the transformer experiences overcurrent, overvoltage, or overtemperature conditions, the PTC thermistor R1 activates, increasing the resistance of the primary winding 110 to achieve automatic protection. When the transformer's voltage, current, and temperature drop to within the rated current, rated voltage, and preset temperature range, the PTC thermistor R1 returns to normal operation, and the transformer enters normal operating condition.
[0030] It should be noted that the PTC thermistor R1 can monitor the transformer's current and temperature in real time, and quickly activate the protection mechanism when the transformer's current and temperature are too high to prevent the transformer from burning out. Furthermore, the resistance and temperature values of the PTC thermistor R1 can be adjusted according to the different requirements of different transformers to adapt to different specifications and types of transformers.
[0031] The surface of winding 100 is wrapped with insulating tape (not shown in the figure). It should be noted that the insulating tape provides electrical insulation to winding 100, effectively isolating it from the external environment and preventing current leakage or short circuits. In high-voltage or high-current applications, the insulating tape enhances the withstand voltage of winding 100, ensuring the electrical safety of the transformer during long-term operation. During transformer operation, winding 100 may loosen due to mechanical vibration or external forces. The insulating tape adheres tightly to the surface of winding 100, providing additional fixation and preventing loosening. Furthermore, during transformer winding, the insulating tape can be easily wrapped around the surface of winding 100, providing additional fixation and support. This helps maintain the flatness and tightness of winding 100, improving winding efficiency and quality.
[0032] Reference Figure 3 The frame 200 includes a first frame 210 and a second frame 220. The first frame 210 is located on the side of the primary winding 110 away from the secondary winding 120, and the second frame 220 is located on the side of the secondary winding 120 away from the primary winding 110.
[0033] It should be noted that the first bobbin 210 and the second bobbin 220 are located on both sides of the primary winding 110 and the secondary winding 120, respectively, forming an effective electrical isolation layer. This prevents electrical short circuits between the primary winding 110 and the secondary winding 120, improving the electrical safety of the transformer. The first bobbin 210 and the second bobbin 220 increase the heat dissipation area of the transformer. During transformer operation, a certain amount of heat is generated, and the separation provided by the bobbin 200 makes it easier for the heat to dissipate through air convection or radiation, thereby reducing the operating temperature of the transformer. In addition, the first bobbin 210 and the second bobbin 220 provide a clear path and support for the winding 100, which helps to simplify the winding process and improve winding efficiency. At the same time, the precise dimensions and shape of the bobbin 200 can ensure the tightness and consistency of the winding 100, improving the electrical performance of the transformer. Furthermore, the separation provided by the bobbin 200 can ensure the precise positional relationship between the primary winding 110 and the secondary winding 120.
[0034] Reference Figure 4 Both the first frame 210 and the second frame 220 are provided with pins 211. The first frame 210 is also provided with multiple wire hanging pins 212 and wire routing grooves 213. The pins 211 are located on one side of the first frame 210 and the second frame 220, and the wire hanging pins 212 are located on the outside of the first frame 210. The wire hanging pins 212 are used to support the winding of the winding 100, and the pins 211 are used to fix the winding 100.
[0035] It should be noted that in this embodiment, the hanging pin 212 is located on the outside of the frame 200, providing a stable support point for the winding of the winding 100, ensuring the tightness and consistency of the winding 100 during the winding process, and preventing the winding of the winding 100 from becoming loose or misaligned. The pin 211 is located on the upper side of the frame 200, and the winding 100 is firmly fixed to the middle of the frame 200 by welding. The wiring groove 213 is used to guide the wiring direction when connecting the wires to the winding 100. When the transformer is wired, the wires need to be wound according to a specific path and sequence. Under the guidance of the wiring groove 213, the accuracy and stability of the winding 100 wiring are further improved. At the same time, the configuration of the pin 211, hanging pin 212, and wiring groove 213 together constitutes an optimized overall structure, which not only improves the manufacturing efficiency and accuracy of the winding 100, but also enhances the stability and reliability of the transformer during operation.
[0036] Reference Figure 4Multiple silicon steel sheets 214 are stacked on the outer sides of the first frame 210 and the second frame 220. It should be noted that the silicon steel sheets 214 have high magnetic permeability. By stacking multiple silicon steel sheets 214 on the outer sides of the first frame 210 and the second frame 220, the magnetic flux density of the winding 100 is further increased, and the magnetic permeability of the magnetic circuit is improved. Furthermore, the multiple silicon steel sheets 214 stacked together form an integral structure, which can significantly improve the mechanical strength and shock resistance of the transformer. This is crucial to ensuring the stable operation of the transformer in harsh environments. At the same time, the stacking of silicon steel sheets 214 also helps to enhance the structural stability of the frame 200, preventing deformation or damage to the frame 200 during long-term use.
[0037] Reference Figure 5 and Figure 6 The first frame 210 and the second frame 220 are both provided with a first extension plane 230 and a second extension plane 240. The first extension plane 230 and the second extension plane 240 are both provided with a first protrusion 231 and a second protrusion 232. The first extension plane 230 and the second extension plane 240 are used to place the silicon steel sheet 214, and the first protrusion 231 and the second protrusion 232 are used to limit the silicon steel sheet 214.
[0038] It should be noted that the first extending plane 230 and the second extending plane 240 provide a clear positioning reference for the silicon steel sheets 214. When stacking the silicon steel sheets 214, each sheet is accurately placed in its preset position on the first extending plane 230 and the second extending plane 240, preventing misalignment or displacement between the sheets. Through the limiting effect of the first protrusion 231 and the second protrusion 232, the silicon steel sheets 214 maintain a stable structure during stacking. Even under external force, the silicon steel sheets 214 are not prone to loosening or falling off. This ensures the reliability and safety of the transformer during long-term use.
[0039] Reference Figure 6 The first frame 210 and the second frame 220 are also provided with a third protrusion 250 and a fourth protrusion 260, which are used to limit the first frame 210 and the second frame 220.
[0040] It should be noted that the third protrusion 250 and the fourth protrusion 260 ensure the precise positioning of the first frame 210 and the second frame 220 during assembly. The limiting protrusions effectively prevent the frame 200 from loosening during long-term use through physical contact and restriction. The guidance of the limiting protrusions reduces the error during transformer installation.
[0041] Winding 100 is also wound with enameled wire (not shown in the figure). It should be noted that enameled wire maintains stable performance at high temperatures, effectively reducing energy loss. Furthermore, the good insulation properties of enameled wire effectively prevent electrical faults, thereby improving the operational safety of the transformer.
[0042] In the description of this specification, references to terms such as "one embodiment," "further embodiment," "some specific embodiments," or "some examples," etc., indicate that a specific feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0043] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A transformer with overcurrent, overvoltage, and overtemperature protection functions, characterized in that, include: magnetic core; The winding is wound on the outer surface of the magnetic core. The winding includes a primary winding and a secondary winding. The primary winding is connected to the secondary winding. The primary winding is provided with a thermistor, which increases the resistance of the winding. A frame is symmetrically arranged on both sides of the winding and connected to the winding. The frame is used to fix the winding and the magnetic core.
2. The transformer with overcurrent, overvoltage, and overtemperature protection functions according to claim 1, characterized in that, The surface of the winding is wrapped with insulating tape.
3. The transformer with overcurrent, overvoltage, and overtemperature protection functions according to claim 1, characterized in that, The frame includes a first frame and a second frame, wherein the first frame is disposed on the side of the primary winding away from the secondary winding, and the second frame is disposed on the side of the secondary winding away from the primary winding.
4. The transformer with overcurrent, overvoltage, and overtemperature protection functions according to claim 3, characterized in that, Both the first frame and the second frame are provided with pins. The first frame is also provided with multiple wire hanging pins and wire routing grooves. The pins are provided on one side of the first frame and the second frame, and the wire hanging pins are provided on the outside of the first frame. The wire hanging pins are used to support the winding of the winding, and the pins are used to fix the winding.
5. The transformer with overcurrent, overvoltage, and overtemperature protection functions according to claim 3, characterized in that, Multiple silicon steel sheets are stacked on the outer sides of the first and second frames.
6. The transformer with overcurrent, overvoltage, and overtemperature protection functions according to claim 5, characterized in that, The first frame is provided with a first extending plane, and the second frame is provided with a second extending plane. Both the first extending plane and the second extending plane are provided with a first protrusion and a second protrusion. The first extending plane and the second extending plane are used to place the silicon steel sheet, and the first protrusion and the second protrusion are used to limit the silicon steel sheet.
7. The transformer with overcurrent, overvoltage, and overtemperature protection functions according to claim 3, characterized in that, The first frame and the second frame are further provided with a third protrusion and a fourth protrusion, which are used to limit the first frame and the second frame.
8. The transformer with overcurrent, overvoltage, and overtemperature protection functions according to claim 1, characterized in that, The winding is also wound with enameled wire.