An electromagnet

Abstract

The utility model discloses an electromagnet belongs to electromagnet technical field. In view of electromagnet can't measure temperature's problem among the prior art, the utility model discloses through setting the structure such as the first temperature sensor of card slot embedding in the inside of coil subassembly, the second temperature sensor of iron core end part blind hole installation and the third temperature sensor of shell inner wall attachment, realize the multi -point temperature monitoring from inside to outside, and the comprehensive perception electromagnet heat state. The integrated terminal box is fixed printed circuit board, and the multi -way sensor signal is concentratedly handled, and the external wiring is simplified. Terminal box panel sets up communication interface and analog output terminal simultaneously, and is compatible with different control systems. Coil and shell interval fill high heat conduction insulating filling adhesive, and combine the cold rolled low carbon steel shell with radiating fin, and optimize the radiating path. The high heat conduction insulating filler is filled in the blind hole of iron core, and the temperature measurement accuracy is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnet technology, and specifically relates to an electromagnet. Background Technology

[0002] When an electromagnet is energized for an extended period or under overload, its internal coil continuously generates heat due to the Joule effect, causing its temperature to rise. Current electromagnets generally lack direct monitoring methods for the temperature of their internal core components, typically relying on indirect and delayed overheat protection through a fixed energizing time or an external thermal relay. This external protection method cannot accurately sense the true temperature of the coil and core in real time, making it difficult to respond promptly in the early stages of temperature anomalies. This can easily lead to insulation aging, magnetic attenuation, or even burnout due to prolonged overheating, posing safety risks and reliability issues.

[0003] This invention attempts to solve or at least alleviate such problems by providing an electromagnet capable of measuring temperature. Utility Model Content

[0004] In view of one or more of the above-mentioned defects or improvement needs of the prior art, this utility model provides an electromagnet with the advantage of being able to measure temperature.

[0005] To achieve the above objectives, this utility model provides an electromagnet, comprising: a housing, a coil assembly disposed within the housing, and an iron core movable relative to the housing;

[0006] The coil assembly has a slot inside for mounting a first temperature sensor, which is fixed in the slot and wrapped by the coil winding.

[0007] The end of the iron core is machined with a blind hole, and a second temperature sensor is installed in the blind hole;

[0008] An integrated terminal box is fixedly connected to the rear of the housing, and a printed circuit board is fixed inside the terminal box.

[0009] The leads of both the first and second temperature sensors are connected to the printed circuit board.

[0010] The terminal box panel is equipped with power supply terminals and a communication interface connector for outputting temperature-related signals.

[0011] As a further improvement of this utility model, the communication interface connector is an industry-standard M-shaped circular connector or an RJ Ethernet connector.

[0012] As a further improvement of this utility model, the terminal box panel is also provided with an analog output terminal for outputting an analog temperature signal, and the analog output terminal is physically isolated from the power supply terminal.

[0013] As a further improvement of this utility model, a third temperature sensor is also attached to the inner wall of the housing, and the lead wire of the third temperature sensor is also connected to the printed circuit board.

[0014] As a further improvement of this utility model, the first temperature sensor is a thin-film platinum resistance thermometer or a chip-type negative temperature coefficient thermistor; the second temperature sensor is a sheathed thermocouple.

[0015] As a further improvement of this utility model, the blind hole at the end of the iron core is filled with a high thermal conductivity insulating filler, and the detection end of the second temperature sensor is in close contact with the wall of the blind hole through the filler.

[0016] As a further improvement of this utility model, the gap between the coil assembly and the outer shell is filled with a highly thermally conductive insulating potting compound.

[0017] As a further improvement of this utility model, the outer shell is made of cold-rolled low-carbon steel, and its outer surface is provided with heat dissipation fins.

[0018] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include:

[0019] This invention relates to an electromagnet that achieves multi-point, omnidirectional temperature monitoring from the internal heat source to the external heat dissipation surface by embedding a first temperature sensor in a slot inside the coil assembly, installing a second temperature sensor in a blind hole machined at the end of the iron core, and attaching a third temperature sensor to the inner wall of the outer shell. This overcomes the monitoring blind spots that may exist with single measuring points. An integrated terminal box houses a printed circuit board, integrating the processing functions of multiple sensor signals into the electromagnet body and simplifying the external wiring structure. The terminal box panel simultaneously features a communication interface and analog output terminals to adapt to the signal requirements of different control systems. A high thermal conductivity insulating potting compound is filled between the coil assembly and the outer shell, combined with a cold-rolled low-carbon steel outer shell and heat dissipation fin design, creating an effective thermal management path. The blind hole in the iron core is filled with a high thermal conductivity insulating filler, ensuring the accuracy and reliability of temperature measurement. The combination of these structures enhances the comprehensiveness of the electromagnet's thermal state assessment, the intelligence of its operation control, and its long-term stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an electromagnet structure according to the present invention;

[0021] Figure 2This is a schematic diagram showing the position of the second temperature sensor of this utility model;

[0022] Figure 3 This utility model Figure 2 Schematic diagram of the structure at point A in the middle;

[0023] Figure 4 This is a schematic diagram showing the location of the third temperature sensor of this utility model;

[0024] Figure 5 This utility model Figure 4 Schematic diagram of the structure at point B;

[0025] Figure 6 This is a schematic diagram of the coil assembly structure of this utility model.

[0026] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0027] 1. Housing; 2. Coil assembly; 3. Iron core; 4. First temperature sensor; 5. Second temperature sensor; 6. Third temperature sensor; 7. Integrated terminal box; 8. Communication interface connector; 9. Analog output terminal. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0030] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0031] In the embodiments, by Figure 1-6An electromagnet is provided, comprising: a housing 1, a coil assembly 2 disposed within the housing 1, and an iron core 3 movable relative to the housing 1; the coil assembly 2 has a slot for mounting a first temperature sensor 4, the first temperature sensor 4 being fixed in the slot and wrapped by the coil winding; the end of the iron core 3 is machined with a blind hole, and a second temperature sensor 5 is installed in the blind hole; an integrated terminal box 7 is fixedly connected to the tail of the housing 1, and a printed circuit board (not shown in the figure) is fixed inside the terminal box 7; the leads of the first temperature sensor 4 and the second temperature sensor 5 are both connected to the printed circuit board; the panel of the terminal box 7 is provided with a power terminal (not shown in the figure) and a communication interface connector 8 for outputting temperature-related signals. The electromagnet wires are connected to the power supply terminals. By setting a first temperature sensor 4 inside the coil assembly 2 and a second temperature sensor 5 inside the blind hole at the end of the iron core 3, the temperature of the two core heating parts of the electromagnet can be directly and accurately monitored. The sensor signals are centrally processed by the printed circuit board in the integrated terminal box 7 and output through the communication interface connector 8, which enables the electromagnet to have real-time self-diagnosis and status feedback capabilities, significantly improving the reliability and safety of the equipment.

[0032] In a preferred embodiment of this invention, the communication interface connector 8 is an industry-standard M12 circular connector or an RJ45 Ethernet connector. The advantage of this is that it provides a standardized, highly reliable physical interface, enhances the compatibility and anti-interference capability of the electromagnet with the industrial control system, and facilitates integration into automated equipment.

[0033] In a preferred embodiment of this invention, the terminal box 7 also has an analog output terminal 9 for outputting an analog temperature signal on its panel. The analog output terminal 9 is physically isolated from the power supply terminals. The addition of the analog output terminal 9, isolated from the power supply terminals, to the terminal box 7 panel provides an analog signal output channel, enabling the electromagnet to meet modern digital communication requirements while remaining compatible with traditional analog control systems, thus expanding its application range.

[0034] In a preferred embodiment of this invention, a third temperature sensor 6 is also attached to the inner wall of the housing 1, and the leads of the third temperature sensor 6 are also connected to the printed circuit board. Attaching the third temperature sensor 6 to the inner wall of the housing 1 increases the overall monitoring points for the housing temperature, allowing for a more comprehensive assessment of the electromagnet's heat dissipation status and operating environment temperature, thus achieving more effective thermal management.

[0035] In a preferred embodiment of this invention, the first temperature sensor 4 is a thin-film platinum resistance thermometer or a surface-mount negative temperature coefficient thermistor; the second temperature sensor 5 is a sheathed thermocouple. The advantage of using the first temperature sensor 4 as a thin-film platinum resistance thermometer or a thermistor, and the second temperature sensor 5 as a sheathed thermocouple, lies in selecting the optimal sensor type to meet the different temperature measurement requirements (accuracy, temperature resistance, response speed) of the coil and the iron core, thus ensuring the accuracy and reliability of the overall temperature measurement solution.

[0036] In a preferred embodiment of this invention, the blind hole at the end of the iron core 3 is filled with a highly thermally conductive insulating filler, and the detection end of the second temperature sensor 5 is in close contact with the wall of the blind hole through this filler. The filling of the blind hole in the iron core 3 with a highly thermally conductive insulating filler ensures an efficient and stable heat conduction path between the second temperature sensor 5 and the iron core 3, while also guaranteeing electrical insulation, thereby obtaining an accurate measurement result reflecting the true temperature of the iron core.

[0037] In a preferred embodiment of this invention, the gap between the coil assembly 2 and the outer shell 1 is filled with a high thermal conductivity insulating potting compound. This filling of the gap between the coil assembly 2 and the outer shell 1 effectively reduces the thermal resistance of heat transfer from the coil 2 to the outer shell 1, improves overall heat dissipation performance, and also serves to fix the internal structure, prevent moisture and shock, and extend service life.

[0038] In a preferred embodiment of this invention, the outer shell 1 is made of cold-rolled low-carbon steel, and its outer surface is provided with heat dissipation fins. The effect of the outer shell 1 being made of cold-rolled low-carbon steel and having heat dissipation fins is that it utilizes the high thermal conductivity of cold-rolled low-carbon steel and the structural advantage of the heat dissipation fins to increase the heat dissipation area, significantly improving the passive heat dissipation efficiency of the electromagnet and fundamentally suppressing temperature rise structurally.

[0039] Working principle: During operation, the first temperature sensor 4 embedded in the slot inside the coil assembly 2, the second temperature sensor 5 installed in the blind hole at the end of the iron core 3, and the third temperature sensor 6 attached to the inner wall of the outer casing 1 respectively collect the temperature signals of the coil winding, the working end of the iron core, and the heat dissipation surface of the outer casing in real time. All sensor signals are transmitted through leads to the printed circuit board integrated in the terminal box 7 for centralized processing and analysis (leads are not shown to avoid clutter in the attached diagram). The printed circuit board outputs the processed temperature data and equipment status information through the communication interface connector 8 or analog output terminal 9 on the panel (the above temperature signal transmission process is existing technology and the principle is not described here), thereby realizing comprehensive, real-time monitoring and intelligent feedback of the overall thermal state of the electromagnet.

[0040] In summary, this invention achieves multi-point, all-around temperature monitoring of the electromagnet from its internal heat source to its external heat dissipation surface by embedding a first temperature sensor in a slot inside the coil assembly, installing a second temperature sensor in a blind hole machined at the end of the iron core, and attaching a third temperature sensor to the inner wall of the outer shell. This overcomes the monitoring blind spots that may exist with a single measuring point. The integrated terminal box houses a printed circuit board, integrating the processing functions of multiple sensor signals into the electromagnet body and simplifying the external wiring structure. The terminal box panel simultaneously features a communication interface and analog output terminals to adapt to the signal requirements of different control systems. A high thermal conductivity insulating potting compound is filled between the coil assembly and the outer shell, combined with the cold-rolled low-carbon steel outer shell and heat dissipation fin design, creating an effective thermal management path. The blind hole in the iron core is filled with a high thermal conductivity insulating filler, ensuring the accuracy and reliability of temperature measurement. The combination of these structures enhances the comprehensiveness of the electromagnet's thermal state assessment, the intelligence of its operation control, and its long-term stability.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. An electromagnet, characterized in that, include: The outer casing (1), the coil assembly (2) disposed inside the outer casing (1), and the iron core (3) movable relative to the outer casing (1); The coil assembly (2) has a slot for installing a first temperature sensor (4) inside. The first temperature sensor (4) is fixed in the slot and wrapped by the coil winding. The end of the iron core (3) is machined with a blind hole, and a second temperature sensor (5) is installed in the blind hole. An integrated terminal box (7) is fixedly connected to the tail of the outer casing (1), and a printed circuit board is fixed inside the terminal box (7). The leads of the first temperature sensor (4) and the second temperature sensor (5) are both connected to the printed circuit board; The terminal box (7) has a power supply terminal and a communication interface connector (8) for outputting temperature-related signals on its panel.

2. The electromagnet of claim 1, wherein: The communication interface connector (8) is an industry-standard M12 circular connector or an RJ45 Ethernet connector.

3. The electromagnet of claim 1, wherein: The terminal box (7) is also provided with an analog output terminal (9) for outputting analog temperature signals. The analog output terminal (9) is physically isolated from the power supply terminal.

4. The electromagnet according to claim 1, characterized in that: A third temperature sensor (6) is also attached to the inner wall of the housing (1), and the leads of the third temperature sensor (6) are also connected to the printed circuit board.

5. The electromagnet according to claim 1, characterized in that: The first temperature sensor (4) is a thin-film platinum resistance thermometer or a chip negative temperature coefficient thermistor; the second temperature sensor (5) is a sheathed thermocouple.

6. The electromagnet according to claim 1, characterized in that: The blind hole at the end of the iron core (3) is filled with a high thermal conductivity insulating filler, and the detection end of the second temperature sensor (5) is in close contact with the wall of the blind hole through the filler.

7. The electromagnet of claim 1, wherein: The gap between the coil assembly (2) and the outer shell (1) is filled with a highly thermally conductive insulating potting compound.

8. The electromagnet according to claim 1, characterized in that: The outer shell (1) is made of cold-rolled low-carbon steel and has heat dissipation fins on its outer surface.

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