CN214748756U - Non-contact electromagnetic excitation system for power transmission line - Google Patents
Non-contact electromagnetic excitation system for power transmission line Download PDFInfo
- Publication number
- CN214748756U CN214748756U CN202121403852.7U CN202121403852U CN214748756U CN 214748756 U CN214748756 U CN 214748756U CN 202121403852 U CN202121403852 U CN 202121403852U CN 214748756 U CN214748756 U CN 214748756U
- Authority
- CN
- China
- Prior art keywords
- current
- power transmission
- carrying circular
- circular coil
- transmission line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model discloses a transmission line non-contact electromagnetic excitation system. The utility model comprises a signal generator, a power amplifier and a current-carrying circular coil; a signal generator is connected with a plurality of power amplifiers, and each power amplifier is connected with a current-carrying circular coil; permanent magnets with the same number as the current-carrying circular coils are uniformly arranged on the power transmission lead, and each current-carrying circular coil is positioned on the same side of the power transmission lead and is in non-contact one-to-one correspondence with each permanent magnet at a certain distance; and a video measuring instrument is arranged on the other side of the power transmission conductor and is in non-contact one-to-one correspondence with each permanent magnet at a certain distance. The utility model discloses both can carry out single excitation frequency's influence analysis, also can make up multiple excitation frequency in order to simulate complicated wind load operating mode, through simple parameter setting, can change frequency, amplitude and the phase place isoparametric of excitation to arouse the state of waving of the various differences of transmission line.
Description
Technical Field
The utility model belongs to the technical field of stride across overhead transmission line greatly and wave model test research, concretely relates to transmission line non-contact electromagnetic excitation system among model test.
Background
The large-span overhead transmission line galloping model test research generally adopts wind tunnel excitation or contact type simulation excitation. Because the span of the power transmission line is large, even if a small-scale model is adopted, the test requirement can be met by using a special wind tunnel, the realization is difficult, and the wind load applied in the wind tunnel test contains a lot of frequency components, so that the influence analysis of the excitation frequency on the power transmission line galloping is inconvenient. The contact type simulation excitation system generates redundant additional constraint while applying excitation, thereby changing the dynamic characteristic of the transmission line and being inconsistent with the actual galloping state.
Disclosure of Invention
An object of the utility model is to above-mentioned problem, provide a transmission line non-contact electromagnetic excitation system to for the transmission line dancing research provides a brand-new analogue test mode.
The above object of the present invention is achieved by the following technical solutions: the non-contact electromagnetic excitation system of the power transmission line comprises a signal generator, a power amplifier and a current-carrying circular coil; a signal generator is connected with a plurality of power amplifiers, and each power amplifier is connected with a current-carrying circular coil; permanent magnets with the same number as the current-carrying circular coils are uniformly arranged on the power transmission lead, and each current-carrying circular coil is positioned on the same side of the power transmission lead and is in non-contact one-to-one correspondence with each permanent magnet at a certain distance; and a video measuring instrument is arranged on the other side of the power transmission conductor and is in non-contact one-to-one correspondence with each permanent magnet at a certain distance.
Specifically, the current-carrying circular coil is a current-carrying circular coil that generates a uniform alternating magnetic field near its central axis.
Specifically, the permanent magnet is a neodymium iron boron permanent magnet.
The utility model discloses a transmission line non-contact electromagnetic excitation system both can carry out single excitation frequency's influence analysis, also can make up multiple excitation frequency in order to simulate complicated wind load operating mode. Through simple parameter setting, parameters such as frequency, amplitude, phase and the like of excitation can be changed, and therefore various different galloping states of the power transmission line are excited. Therefore, the utility model discloses electromagnetic excitation system can provide technical support for transmission line galloping mechanism and damping control research thereof.
Drawings
Fig. 1 is a schematic structural diagram of the non-contact electromagnetic excitation system of the power transmission line of the present invention.
Fig. 2 is a schematic diagram of the connection of a set of contactless electromagnetic excitation systems of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1 and fig. 2, the non-contact electromagnetic excitation system for power transmission line of the present embodiment includes: the device comprises a signal generator 1, a power amplifier 2 and a current-carrying circular coil 3; a signal generator 1 is connected with 3 power amplifiers 2, and each power amplifier 2 is connected with a current-carrying circular coil 3 which can generate a uniform alternating magnetic field near the central axis of the power amplifier; generating a single simple harmonic signal or a combination of multiple simple harmonic signals by inputting a desired waveform, frequency and amplitude through an adjusting knob in a control panel of the signal generator 1; the power amplifier 2 amplifies the signal generated by the signal generator 1, and can output enough power to drive the current-carrying circular coil 3 under the condition of ensuring that the signal is not distorted within a certain frequency range; the current-carrying circular coil 3 is a magnetic field generating device, signals are amplified by the power amplifier 2 and then input into the current-carrying circular coil 3, the current-carrying circular coil 3 generates an alternating magnetic field which is uniform and has the same frequency with the signals near a central axis, and when the permanent magnet is positioned in the alternating magnetic field, the alternating magnetic field can be acted by alternating electromagnetic force. 3 neodymium iron boron permanent magnets 4 with the same number as that of the current-carrying circular coils 3 are uniformly arranged on a certain phase of power transmission lead 5, and each current-carrying circular coil 3 is positioned on the same side of the power transmission lead 5 and is in non-contact one-to-one correspondence with each neodymium iron boron permanent magnet 4 at a certain distance (ensuring that the current-carrying circular coils are not touched when the maximum amplitude of the power transmission lead span after starting oscillation in an experiment); and a video measuring instrument 6 is arranged on the other side of the power transmission conductor 5 and serves as a testing system, and is in non-contact one-to-one correspondence with each neodymium iron boron permanent magnet 4 at a certain distance (the video measuring instrument is not touched when the maximum amplitude of the power transmission conductor across the medium after starting oscillation in the experiment is ensured).
Claims (3)
1. A non-contact electromagnetic excitation system of a power transmission line is characterized in that: the device comprises a signal generator, a power amplifier and a current-carrying circular coil; a signal generator is connected with a plurality of power amplifiers, and each power amplifier is connected with a current-carrying circular coil; permanent magnets with the same number as the current-carrying circular coils are uniformly arranged on the power transmission lead, and each current-carrying circular coil is positioned on the same side of the power transmission lead and is in non-contact one-to-one correspondence with each permanent magnet at a certain distance; and a video measuring instrument is arranged on the other side of the power transmission conductor and is in non-contact one-to-one correspondence with each permanent magnet at a certain distance.
2. The non-contact electromagnetic excitation system of the power transmission line according to claim 1, characterized in that: the current-carrying circular coil is a current-carrying circular coil which generates a uniform alternating magnetic field near the central axis of the current-carrying circular coil.
3. The non-contact electromagnetic excitation system of the power transmission line according to claim 1, characterized in that: the permanent magnet is a neodymium iron boron permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121403852.7U CN214748756U (en) | 2021-06-23 | 2021-06-23 | Non-contact electromagnetic excitation system for power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121403852.7U CN214748756U (en) | 2021-06-23 | 2021-06-23 | Non-contact electromagnetic excitation system for power transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214748756U true CN214748756U (en) | 2021-11-16 |
Family
ID=78630642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121403852.7U Active CN214748756U (en) | 2021-06-23 | 2021-06-23 | Non-contact electromagnetic excitation system for power transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214748756U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418669A (en) * | 2021-06-23 | 2021-09-21 | 湖南科技大学 | Method for determining parameters of non-contact electromagnetic excitation system of power transmission line |
-
2021
- 2021-06-23 CN CN202121403852.7U patent/CN214748756U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418669A (en) * | 2021-06-23 | 2021-09-21 | 湖南科技大学 | Method for determining parameters of non-contact electromagnetic excitation system of power transmission line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214748756U (en) | Non-contact electromagnetic excitation system for power transmission line | |
| CN105571961A (en) | Electromagnetic induction type Hopkinson torsion and pressure bar loading device and experimental method | |
| CN103994922A (en) | Stretching and compression stress wave generator based on electromagnetic force and experimental method | |
| CN108649833A (en) | Self-powered friction nanometer power generator wireless sensing emission system with identity information | |
| CN103105844B (en) | Detection method and detection system of generator sub-synchronous resonance generator terminal damping controller | |
| CN105928713A (en) | Signal reproduction system for real-car ABS four wheel speed sensor | |
| CN109508480A (en) | A kind of construction low-frequency harmonics electric current calculates the semi-analytic method of motor high frequency electromagnetic force | |
| Qiu et al. | Multi-directional electromagnetic vibration energy harvester using circular Halbach array | |
| CN201600442U (en) | Magnetic field sensor based on magnetic induction effect of amorphous ribbons | |
| CN201522365U (en) | Non-contact sound-pressure excitation device | |
| CN204758245U (en) | A shaking table for testing automobile sensor anti -seismic performance | |
| CN107509156A (en) | Sound equipment tuning device, tuning system and method with audio analysis writing function | |
| CN113418669B (en) | Method for determining parameters of non-contact electromagnetic excitation system of power transmission line | |
| CN203849435U (en) | Weak signal detection platform for detecting nuclear magnetic resonance water detector | |
| CN203941068U (en) | A kind of suspension electric magnetization resonant mode fatigue experimental device | |
| CN104034809B (en) | A kind of 128 channel ultrasound phased array driving pulses produce system and method | |
| CN102868462A (en) | Inter-modulation signal detecting system and method | |
| CN202818313U (en) | Detection system for intermodulation signal | |
| CN206975199U (en) | A kind of railway system's low-frequency AC magnetic fields test system | |
| Wei et al. | Study of a magnetostrictive energy harvester for harvesting transient shock vibration | |
| CN108344494A (en) | Low frequency electromagnetic shake table movement velocity detection device based on induction coil | |
| Xian-ling | The virtual Instrument based on labVIEW and Sound Card | |
| CN104034500B (en) | damper function test system device | |
| Zhou et al. | Analysis of Transmission Characteristics on FSK-based Rotating-magnet Based Mechanical Antenna | |
| Jing et al. | Design and Implementation of Vibration Energy Harvester Based on MSMA Cantilever Beam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |