Electromagnet on-line detection device

Abstract

The utility model belongs to the technical field of electromagnet on-line parameter detection, and particularly relates to an electromagnet on-line detection device which is connected in series between the positive end and the negative end of an electromagnet input power supply through an internal resistance monitoring loop composed of a first resistor and a second resistor. The change of the internal resistance of the electromagnet can be monitored; an insulation detection loop is formed by a third resistor and a fourth resistor, the fourth resistor is connected with an insulation resistor of an electromagnet in parallel, and when the insulation resistor of the electromagnet is reduced, shunt on the fourth resistor is reduced, so that the change of the insulation resistor of the electromagnet can be detected by monitoring the voltage change on the fourth resistor; according to the utility model, voltage signals are obtained through the processor, thereby effectively obtaining the change of internal resistance and insulation resistance of the electromagnet in real time, and reflecting the on-line real performance condition of the electromagnet.

Description

Technical Field

[0001] The utility model belongs to the technical field of on-line parameter detection of electromagnets, and particularly relates to an on-line detection device for electromagnets. Background Art

[0002] An electromagnet is a device that generates a magnetic field through an electric current, and its principle is based on the magnetic field generated around the electric current. When an electric current passes through a coil, the coil generates a magnetic field, and the intensity of this magnetic field is related to the magnitude of the electric current and the number of turns of the coil. Electromagnets have a wide range of applications in many fields including industrial production, power systems, medical equipment, and transportation.

[0003] If an electromagnet is damaged during on-line use, it may affect production or even cause safety accidents. Therefore, it is necessary to detect the performance of the electromagnet in real time. In the existing applications of electromagnets, manual detection is generally carried out when the electromagnet is powered off. However, this detection method is inefficient, difficult to reflect the real on-line performance of the electromagnet, and cannot realize real-time early warning of the performance of the electromagnet. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the defect of low efficiency of manual detection of the performance of electromagnets in the prior art, and thus provide an on-line detection device for electromagnets.

[0005] An on-line detection device for an electromagnet includes a processor, an internal resistance monitoring circuit, and an insulation detection circuit; the internal resistance monitoring circuit includes a first resistor and a second resistor. The first end of the first resistor is connected to the positive end of the input power supply of the electromagnet, the second end of the first resistor is connected to the first end of the second resistor, and the second end of the second resistor is connected to the negative end of the input power supply of the electromagnet; the insulation detection circuit includes a third resistor and a fourth resistor. The first end of the third resistor is connected to the positive end of the input power supply of the electromagnet, the second end of the third resistor is connected to the negative end of the input power supply of the electromagnet, the first end of the fourth resistor is connected to the second end of the third resistor, and the second end of the fourth resistor is grounded; the processor is respectively connected to the second end of the first resistor and the first end of the fourth resistor.

[0006] Further, it further includes a voltage isolation module, and the second end of the first resistor is connected to the processor through the voltage isolation module.

[0007] Further, it further includes a power supply module, and the power supply module provides power for the processor through the voltage isolation module.

[0008] Further, it further includes a battery block, and the battery block provides power for the voltage isolation module.

[0009] Further, the power input terminal of the power supply module is connected to the negative electrode of the first diode, the positive electrode of the first diode is connected to the second terminal of the first resistor, the power output terminal of the power supply module is connected to the second isolation input terminal of the voltage isolation module, the power ground terminal is connected to the positive electrode of the second diode, the negative electrode of the second diode is connected to the negative terminal of the electromagnet input power supply, the first capacitor is connected between the power input terminal and the power ground terminal of the power supply module, and the second capacitor is connected between the power output terminal and the power ground terminal of the power supply module.

[0010] Further, the first isolation input terminal of the voltage isolation module is connected to the second terminal of the first resistor, the first isolation output terminal is connected to the first input terminal of the processor, the second isolation output terminal is connected to the power input terminal of the processor, the isolation ground input terminal is connected to the power ground terminal of the power supply module, the isolation ground output terminal is connected to the ground terminal of the processor, the second isolation output terminal of the voltage isolation module is grounded through the third capacitor, and the second input terminal of the processor is connected to the first terminal of the fourth resistor.

[0011] Further, the processor includes a warning output terminal and an alarm output terminal, and the warning output terminal and the alarm output terminal are respectively connected to a light-emitting diode.

[0012] Further, a signal output module is further included. The input terminal of the signal output module is connected to the signal output terminal of the processor, and the output terminal outputs a contact signal.

[0013] Beneficial effects:

[0014] 1. The present utility model discloses an on-line detection device for an electromagnet. An internal resistance monitoring circuit composed of a first resistor and a second resistor is connected in series between the positive terminal and the negative terminal of the electromagnet input power supply, and a voltage signal is obtained by voltage division when the electromagnet is de-energized and released, so as to be able to monitor the change of the internal resistance of the electromagnet; through an insulation detection circuit composed of a third resistor and a fourth resistor, the fourth resistor is in parallel with the insulation resistance of the electromagnet. When the insulation resistance of the electromagnet decreases, the shunt on the fourth resistor decreases, so that the change of the insulation resistance of the electromagnet can be detected by monitoring the voltage change on the fourth resistor; the present utility model obtains the voltage signal through the processor, so as to effectively obtain the changes of the internal resistance and insulation resistance of the electromagnet in real time, and reflect the on-line real performance status of the electromagnet.

[0015] 2. The present utility model also provides power for the processor module through the setting of the voltage isolation module, and isolates the voltage signal from the electromagnet control system, avoiding the mutual interference between the voltage signal and the electromagnet control system, and improving the reliability of the detection device. By connecting the warning output terminal and the alarm output terminal on the processor to the light-emitting diode, the abnormal state detected by the detection device can be visually displayed, providing an effective alarm for personnel. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic block diagram of the overall structure of the present utility model;

[0018] Figure 2 It is a schematic diagram of the circuit structure of the present utility model.

[0019] Description of the reference numerals:

[0020] R0, internal resistance of the electromagnet; R1, the first resistor; R2, the second resistor; R3, the third resistor; R4, the fourth resistor; C1, the first capacitor; C2, the second capacitor; C3, the third capacitor; D1, the first diode; D2, the second diode; U1, the processor; U2, the voltage isolation module; U3, the power supply module; E1, the battery block. Detailed Embodiments

[0021] In order to make the above objects, features and advantages of the present application more obvious and understandable, the following will make a detailed description of the specific embodiments of the present application in conjunction with the drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0022] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0023] In this application, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] Referring to Figure 1 As shown, the power supply and signal conditioning module includes an internal resistance monitoring circuit, an insulation detection circuit, and a power supply module U3.

[0025] Referring to Figure 2 As shown, where P represents the positive terminal of the input power supply of the electromagnet, N represents the negative terminal of the input power supply of the electromagnet, R0 represents the internal resistance of the electromagnet, PE represents the outer shell of the electromagnet, and RS represents the actual insulation resistance of the electromagnet to the ground. This embodiment discloses an on-line detection device for an electromagnet, including a processor U1, an internal resistance monitoring circuit, and an insulation detection circuit; the internal resistance monitoring circuit includes a first resistor R1 and a second resistor R2. The first end of the first resistor R1 is connected to the positive terminal of the input power supply of the electromagnet, the second end of the first resistor R1 is connected to the first end of the second resistor R2, and the second end of the second resistor R2 is connected to the negative terminal of the input power supply of the electromagnet; the insulation detection circuit includes a third resistor R3 and a fourth resistor R4. The first end of the third resistor R3 is connected to the positive terminal of the input power supply of the electromagnet, the second end of the third resistor R3 is connected to the negative terminal of the input power supply of the electromagnet, the first end of the fourth resistor R4 is connected to the second end of the third resistor R3, and the second end of the fourth resistor R4 is grounded; the processor U1 is respectively connected to the second end of the first resistor R1 and the first end of the fourth resistor R4.

[0026] For the on-line detection device for an electromagnet disclosed in this embodiment, the internal resistance monitoring circuit composed of the first resistor R1 and the second resistor R2 is connected in series between the positive terminal and the negative terminal of the input power supply of the electromagnet, and a voltage signal is obtained by voltage division when the electromagnet is de-energized and released, so as to be able to monitor the change of the internal resistance R0 of the electromagnet; through the insulation detection circuit composed of the third resistor R3 and the fourth resistor R4, the fourth resistor R4 is in parallel with the insulation resistance of the electromagnet. When the insulation resistance of the electromagnet decreases, the shunt on the fourth resistor R4 decreases, so that the change of the insulation resistance of the electromagnet can be detected by monitoring the voltage change on the fourth resistor R4; the utility model obtains the voltage signal through the processor U1, so as to effectively obtain the changes of the internal resistance and insulation resistance of the electromagnet in real time, and reflect the on-line true performance status of the electromagnet.

[0027] As a further improvement of this embodiment, it further includes a voltage isolation module U2. The second end of the first resistor R1 is connected to the processor U1 through the voltage isolation module U2. It also includes a power supply module U3. The power supply module U3 supplies power to the processor U1 through the voltage isolation module U2. It further includes a battery block E1. The electromagnetic block supplies power to the voltage isolation module U2. Through the setting of the voltage isolation module U2, power is supplied to the processor U1 module, and the voltage signal is isolated from the electromagnet control system, avoiding the mutual interference between the voltage signal and the electromagnet control system, and improving the reliability of the detection device.

[0028] Specifically, the power input terminal of the power supply module U3 is connected to the negative electrode of the first diode D1. The positive electrode of the first diode D1 is connected to the second end of the first resistor R1. The power output terminal of the power supply module U3 is connected to the second isolation input terminal of the voltage isolation module U2. The power ground terminal is connected to the positive electrode of the second diode D2. The negative electrode of the second diode D2 is connected to the negative end of the electromagnet input power supply. The first capacitor C1 is connected between the power input terminal and the power ground terminal of the power supply module U3. The second capacitor C2 is connected between the power output terminal and the power ground terminal of the power supply module U3.

[0029] The first isolation input terminal of the voltage isolation module U2 is connected to the second end of the first resistor R1. The first isolation output terminal is connected to the first input terminal of the processor U1. The second isolation output terminal is connected to the power input terminal of the processor U1. The isolation ground input terminal is connected to the power ground terminal of the power supply module U3. The isolation ground output terminal is connected to the ground terminal of the processor U1. The second isolation output terminal of the voltage isolation module U2 is grounded through the third capacitor C3. The second input terminal of the processor U1 is connected to the first end of the fourth resistor R4.

[0030] The output of the power supply module U3 is DC5V, and the battery block E1 is a DC6V battery.

[0031] In this embodiment, the processor U1 includes a warning output terminal and an alarm output terminal. The warning output terminal and the alarm output terminal are respectively connected to a light-emitting diode. By connecting the light-emitting diodes to the warning output terminal and the alarm output terminal on the processor U1, the abnormal states detected by the detection device can be visually displayed, providing effective alarms for personnel.

[0032] It further includes a signal output module. The input terminal of the signal output module is connected to the signal output terminal of the processor U1, and the output terminal outputs a contact signal.

[0033] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0034] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several variations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An on-line detection device for an electromagnet, characterized in that, It includes a processor, an internal resistance monitoring circuit and an insulation detection circuit; the internal resistance monitoring circuit includes a first resistor and a second resistor, the first end of the first resistor is connected to the positive terminal of the electromagnet input power supply, the second end of the first resistor is connected to the first end of the second resistor, and the second end of the second resistor is connected to the negative terminal of the electromagnet input power supply; the insulation detection circuit includes a third resistor and a fourth resistor, the first end of the third resistor is connected to the positive terminal of the electromagnet input power supply, the second end of the third resistor is connected to the negative terminal of the electromagnet input power supply, the first end of the fourth resistor is connected to the second end of the third resistor, and the second end of the fourth resistor is grounded; the processor is respectively connected to the second end of the first resistor and the first end of the fourth resistor.

2. The on-line detection device for an electromagnet according to claim 1, characterized in that, It further includes a voltage isolation module, and the second end of the first resistor is connected to the processor through the voltage isolation module.

3. An on-line detection device for an electromagnet according to claim 2, characterized in that, It further includes a power supply module, and the power supply module provides power for the processor through the voltage isolation module.

4. An on-line detection device for an electromagnet according to claim 3, characterized in that, The power input terminal of the power supply module is connected to the negative electrode of the first diode, the positive electrode of the first diode is connected to the second end of the first resistor, the power output terminal of the power supply module is connected to the second isolation input terminal of the voltage isolation module, the power ground terminal is connected to the positive electrode of the second diode, the negative electrode of the second diode is connected to the negative terminal of the electromagnet input power supply, a first capacitor is connected between the power input terminal and the power ground terminal of the power supply module, and a second capacitor is connected between the power output terminal and the power ground terminal of the power supply module.

5. An on-line detection device for an electromagnet according to claim 4, characterized in that, The first isolation input terminal of the voltage isolation module is connected to the second end of the first resistor, the first isolation output terminal is connected to the first input terminal of the processor, the second isolation output terminal is connected to the power input terminal of the processor, the isolation ground input terminal is connected to the power ground terminal of the power supply module, the isolation ground output terminal is connected to the ground terminal of the processor, the second isolation output terminal of the voltage isolation module is grounded through a third capacitor, and the second input terminal of the processor is connected to the first end of the fourth resistor.

6. An on-line detection device for an electromagnet according to claim 2, characterized in that, It further includes a battery block, and the battery block provides power for the voltage isolation module.

7. An on-line detection device for an electromagnet according to claim 1, characterized in that, The processor includes a warning output terminal and an alarm output terminal, and the warning output terminal and the alarm output terminal are respectively connected to a light-emitting diode.

8. An on-line detection device for an electromagnet according to claim 1, characterized in that, It further includes a signal output module, the input terminal of the signal output module is connected to the signal output terminal of the processor, and the output terminal outputs a contact signal.

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