An inductance value testing device for iron core reactor
By designing a core reactor inductance value testing device including monitoring components and anti-electrophoretic components, the error problem caused by different internal resistances when measuring the inductance value of existing equipment is solved, and accurate measurement and reliable test results of the core reactor inductance value are achieved.
Patent Information
- Application Number
- CN202421008727.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-05-10
AI Technical Summary
When the existing equipment measures the inductance value of the iron core reactor, the currents are different at the same level, resulting in a large difference in the test results, and there is a large error between the measured inductance value and the actual inductance value.
A iron core reactor inductance value testing device is designed, including a monitoring assembly and an anti-electrophoretic assembly. The monitoring component monitors and calculates the inductance value of the reactor in real time through the contactor, measurement and control unit, transformer and HMI human-computer interactive screen; the anti-electrophoresis component maintains a stable output current through the capacitor and a plastic case circuit breaker to prevent excessive current.
Through the use of this device, the inductance value of the iron core reactor can be accurately measured, errors can be reduced, and the reliability and accuracy of the test results can be ensured.
Smart Images
Figure CN222719641U_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of electrical measuring equipment, and in particular relates to an inductance value testing device for an iron core reactor. Background Art
[0002] Iron core reactors are widely used in low voltage power distribution systems for current limiting, filtering, reactive power compensation and improving voltage distribution. Therefore, the accuracy of the reactor inductance parameter affects the safety and reliability of the entire low voltage power distribution system. If the inductance deviation of the inverter's incoming line reactor is too large, the filtering effect will be deteriorated or there will be no filtering effect. The harmonic current generated by the inverter will flow into the power grid in large quantities and pollute the power grid. If the inductance deviation of the capacitor reactance filter branch is too large, the reactance rate will deviate greatly from the design value, and the system will have the risk of resonance, causing overvoltage and overcurrent in the system and burning equipment.
[0003] The conventional and simple test method is to use a digital bridge or a multimeter to measure the inductance of the iron core reactor. The inductance of the iron core is very sensitive to the magnetic field applied to it, and the magnetic field is proportional to the test signal current. If the internal resistance is different at the same level, the current will be different, and the test results will be very different. The inductance value measured by this method has a large error with the actual inductance value, and it is impossible to accurately measure the parameters of the iron core reactor. Summary of the invention
[0004] The technical problem to be solved by the present invention is that if the internal resistance of the existing equipment is different at the same electrical level, the current will be different, and the test results will be very different. There is a large error between the inductance value measured by this method and the actual inductance value.
[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a device for testing the inductance value of an iron core reactor, comprising a cabinet and a monitoring component arranged inside the cabinet, wherein the monitoring component is used to monitor the reactor circuit; it also includes an anti-electrophoresis component arranged in the cabinet, wherein the anti-electrophoresis component is used to maintain a stable output current, and a movable wheel arranged at the lower end of the cabinet.
[0006] Furthermore, the monitoring component includes a contactor, a measurement and control unit, a transformer and an HMI human-machine interaction screen. The shell is fixedly connected to the upper end of the cabinet, the contactor is fixedly connected to the right side of the cabinet, the measurement and control unit is fixedly connected to the right side of the cabinet, the transformer is fixedly connected to the bottom of the cabinet, the HMI human-machine interaction screen is fixedly connected to the upper part of the shell, and a clip is provided on one side of the transformer, and the clip is connected to the transformer through a wire.
[0007] Furthermore, the anti-electrophoresis component includes a shell, a molded case circuit breaker and a capacitor. The shell is fixed to the upper end of the cabinet, and a closed monitoring cavity is formed inside the shell. The molded case circuit breaker is fixed inside the monitoring cavity, and the capacitor is fixed to the bottom of the cabinet. An indicator light is provided on the upper part of the shell.
[0008] Furthermore, the moving wheel is fixedly connected to the bottom end outside the cabinet.
[0009] Furthermore, the molded case circuit breaker is connected to the capacitor via a wire, and the indicator light is connected in series into the circuit via the wire.
[0010] Furthermore, the contactor is connected to the measurement and control unit through a wire, and the transformer is connected to the measurement and control unit through a wire.
[0011] Furthermore, the contactor is connected to the inner wall of the cabinet via a guide rail, and the measurement and control unit is connected to the inner wall of the cabinet via a guide rail.
[0012] Furthermore, the transformer and capacitor are connected to the bottom of the cabinet by bolts.
[0013] After adopting the above structure, the beneficial effects of the present invention are as follows:
[0014] (1) Through the setting of the monitoring component, the reactor detection end adopts a clip, which is directly clamped on the reactor, so that the reactor can be powered on for detection.
[0015] (2) By setting up a surge discharge component, in order to prevent the output current of the device from being too large after the reactor is put into use, the test power supply is jumped, and the opposite characteristics of the capacitor and the reactance reactive power are used to maintain the output current of the entire device within a limited range. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.
[0017] Figure 1 It is a schematic diagram of the overall structure proposed by the present invention;
[0018] Figure 2 A partial structural diagram of the present invention;
[0019] Figure 3 This is a partial structural diagram of the present invention.
[0020] In the attached drawings: 1. cabinet, 2. monitoring component, 3. anti-electrophoresis component, 4. moving wheel, 5. contactor, 6. measurement and control unit, 7. transformer, 8. HMI human-machine interaction screen, 9. clip, 10. shell, 11. molded case circuit breaker, 12. capacitor, 13. indicator light. DETAILED DESCRIPTION
[0021] like Figure 1 As shown, a device for testing the inductance value of an iron core reactor comprises a cabinet 1, and a monitoring component 2 arranged inside the cabinet 1, the monitoring component 2 is used to monitor the reactor circuit; it also comprises an anti-electrophoresis component arranged in the cabinet 1, the anti-electrophoresis component 3 is used to maintain a stable output current, and a moving wheel 4 arranged at the lower end of the cabinet 1.
[0022] like Figure 1-3 As shown, the monitoring component 2 includes a contactor 5, a measurement and control unit 6, a transformer 7 and an HMI human-machine interaction screen 8. The shell 10 is fixedly connected to the upper end of the cabinet 1, the contactor 5 is fixedly connected to the right side of the cabinet 1, the measurement and control unit 6 is fixedly connected to the right side of the cabinet 1, the transformer 7 is fixedly connected to the bottom of the cabinet 1, the HMI human-machine interaction screen 8 is fixedly connected to the upper part of the shell 10, and a clip 9 is provided on one side of the transformer 7, and the clip 9 is connected to the transformer 7 through a wire.
[0023] like Figure 2-3 As shown, the anti-electrophoresis component 3 includes a shell 10, a molded case circuit breaker 11 and a capacitor 12. The shell 10 is fixedly connected to the upper end of the cabinet 1. A closed monitoring cavity is formed inside the shell 10. The molded case circuit breaker 11 is fixedly connected to the inside of the monitoring cavity. The capacitor 12 is fixedly connected to the bottom of the cabinet 1. An indicator light 13 is provided on the upper part of the shell 10.
[0024] Among them, the moving wheel 4 is fixed to the outer bottom end of the cabinet 1, the molded case circuit breaker is connected to the capacitor 12 through a wire, the indicator light 13 is connected in series to the circuit through a wire, the contactor 5 is connected to the measurement and control unit 6 through a wire, the transformer 7 is connected to the measurement and control unit 6 through a wire, the contactor 5 is connected to the inner wall of the cabinet 1 through a guide rail, the measurement and control unit 6 is connected to the inner wall of the cabinet 1 through a guide rail, and the transformer 7 and the capacitor 12 are connected to the bottom of the cabinet 1 through bolts.
[0025] The usage and principle of this device are as follows:
[0026] Before testing the reactor, first clamp the two ends of the reactor to be tested with the clamps 9 connected to the transformer 7 through the wire, close the test molded case circuit breaker 11, connect the main circuit, and the indicator light 13 will light up.
[0027] On the HMI human-machine interaction screen 8, click to start the test. The HMI human-machine interaction screen 8 controls the measurement and control unit 6 to issue a closing command to close the main circuit contactor 5. The indicator light 13 of the transformer 7 lights up. At this time, the measurement and control unit 6 monitors the front-end data of the transformer 7 in real time. If the current is too large, the capacitor molded case circuit breaker 11 can be manually closed to put in capacitors to neutralize the current. The capacitor indicator light 13 lights up.
[0028] The output terminal of transformer 7 is connected to the iron core reactor under test as the terminal voltage of the reactor. The measurement and control unit 6 collects the terminal voltage of the reactor and the current flowing through the reactor in real time, and calculates the inductive reactance XL=U / I of the circuit in real time through Ohm's law on the HMI screen. At the same time, XL=2ΠfL. Based on this formula, the inductance value L is calculated in real time on the screen and displayed. Click the cancel button on the screen to separate the main circuit contactor 5, the indicator light 13 of transformer 7 goes out, and then the molded case circuit breaker 11 is disconnected in sequence.
[0029] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents. In short, if those skilled in the art are inspired by them and design structural modes and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they shall all fall within the scope of protection of the present invention.
Claims
1. An iron core reactor inductance value testing device, characterized in that: It includes a cabinet, and a monitoring component arranged inside the cabinet, the monitoring component is used to monitor the reactor circuit; it also includes an anti-electrophoresis component arranged in the cabinet, the anti-electrophoresis component is used to maintain a stable output current, and a moving wheel arranged at the lower end of the cabinet.
2. The iron core reactor inductance test device according to claim 1, characterized in that: The moving wheel is fixedly connected to the outer bottom end of the cabinet.
3. The iron core reactor inductance test device according to claim 1, characterized in that: The monitoring component includes a contactor, a measurement and control unit, a transformer and an HMI human-machine interaction screen. The contactor is fixedly connected to the right side of the cabinet, the measurement and control unit is fixedly connected to the right side of the cabinet, the transformer is fixedly connected to the bottom of the cabinet, the HMI human-machine interaction screen is fixedly connected to the upper part of the shell, and a clip is provided on one side of the transformer, and the clip is connected to the transformer through a wire.
4. The iron core reactor inductance test device according to claim 3, characterized in that: The contactor is connected to the measurement and control unit through a wire, and the transformer is connected to the measurement and control unit through a wire.
5. The iron core reactor inductance test device according to claim 3, characterized in that: The contactor is connected to the inner wall of the cabinet through a guide rail, and the measurement and control unit is connected to the inner wall of the cabinet through a guide rail.
6. The iron core reactor inductance test device according to claim 3, characterized in that: The anti-electrophoresis component includes a shell, a molded case circuit breaker and a capacitor. The shell is fixed to the upper end of the cabinet, and a closed monitoring cavity is formed inside the shell. The molded case circuit breaker is fixed inside the monitoring cavity, and the capacitor is fixed to the bottom of the cabinet. An indicator light is provided on the upper part of the shell.
7. The iron core reactor inductance test device according to claim 6, characterized in that: The molded case circuit breaker is connected to the capacitor through a wire, and the indicator light is connected in series into the circuit through a wire.
8. The iron core reactor inductance test device according to claim 6, characterized in that: The transformer and the capacitor are connected to the bottom of the cabinet by bolts.