CN208432702U - A kind of motor ground fault detection warning device - Google Patents
A kind of motor ground fault detection warning device Download PDFInfo
- Publication number
- CN208432702U CN208432702U CN201820871068.0U CN201820871068U CN208432702U CN 208432702 U CN208432702 U CN 208432702U CN 201820871068 U CN201820871068 U CN 201820871068U CN 208432702 U CN208432702 U CN 208432702U
- Authority
- CN
- China
- Prior art keywords
- rotor
- insulating base
- sliding ring
- artifical resistance
- resistance bridge
- 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.)
- Expired - Fee Related
Links
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The utility model discloses a kind of motor ground fault detection warning devices, including insulating base and rotor, and the insulation rotor set and ground connection rotor set of insulating base are set, ground connection rotor set is internally provided with the ground wire across insulating base, the both ends of rotor are mounted on insulation rotor set by insulation bearing and ground connection rotor is put on, insulating base is internally provided with artifical resistance bridge, the both ends of rotor are respectively installed with sliding ring A and sliding ring B, and it is located on the inboard sliding ring A of insulation rotor set and is connected with multi-thread core magnet exciting coil, the lead of multi-thread magnet exciting coil passes through insulating base and is connected on artifical resistance bridge, artifical resistance bridge is connected on the inboard sliding ring B of node rotor set by lead, AC/DC module is additionally provided with inside insulating base, and the output end of AC/DC module is electrically connected on artifical resistance bridge, sliding ring It is connected with interior magnetic lead between A and sliding ring B, accurately judges motor ground fault, quickly alarms, and carry out certain compensation and restore automatically.
Description
Technical field
The utility model relates to motor field, specially a kind of motor ground fault detection warning device.
Background technique
The armature spindle of high-speed rotating motor device can generate certain shaft voltage when operating normally, if shaft voltage
Inhibit and safeguard procedures are not proper, circuit, will generate shaft current once being formed, and stronger shaft current can generate electric arc, make to moisten
Sliding rapid degradation, and cause the galvano-cautery of axle journal and bearing alloy, failure is caused, while stronger shaft current can also be brought seriously
Equipment magnetization, cause vibration etc. failures, lead to stopping accident.
Energized circuit voltage-to-ground will be increased after generator amature one point earth, under normal circumstances, energized circuit
Voltage-to-ground is about the half of excitation voltage, and when metallic earthing failure occurs for one end of energized circuit, the other end is electric over the ground
It is whole excitation voltage values that pressure, which will increase, i.e., is higher by one times than normal voltage value, runs in this case, when cutting excitation is returned
When the main circuit breaker of switch or primary circuit in road, transient overvoltage will be generated in energized circuit, under the effect of this voltage,
The weak place of insulation other in energized circuit may be punctured, so as to cause second point ground connection, when rotor one point to ground fault, turned
Even if metallic earthing failure occurs near class mid point for son, grounding monitor is there are dead zone, when rotor two points ground fault, grounding monitor
There is also dead zones, and grounding monitor dead zone is influenced by ground resistance.
Summary of the invention
In order to overcome the shortcomings of prior art, the utility model provides a kind of motor ground fault detection alarm dress
It sets, realizes and accurately judge motor ground fault, quickly alarm, and carry out certain compensation and restore automatically, it can be effective
Solve the problems, such as that background technique proposes.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of motor ground fault detection warning device, including insulating base and rotor, and be arranged in insulating base upper surface
The insulation rotors of two sides covers and ground connection rotor set, and the ground connection rotor set is internally provided with the ground wire across insulating base, and described turn
The both ends of son are mounted on insulation rotor set by insulation bearing and ground connection rotor is put on, and the insulating base is internally provided with simulation electricity
Bridge is hindered, the both ends of the rotor are respectively installed with sliding ring A and sliding ring B, and are located on the inboard sliding ring A of insulation rotor set
It is connected with multi-thread core magnet exciting coil, the lead of the multi-thread magnet exciting coil passes through insulating base and is connected on artifical resistance bridge, described
Artifical resistance bridge is connected on the inboard sliding ring B of node rotor set by lead, is additionally provided with inside the insulating base
AC/DC module, and the output end of the AC/DC module is electrically connected on artifical resistance bridge, the sliding ring A and sliding ring B
Between be connected with interior magnetic lead.
Further, the artifical resistance bridge is connected on ground wire by lead, and the AC/DC block coupled in series is in simulation electricity
It hinders on the lead between bridge and ground wire.
Further, voltage monitor, the voltage are parallel between the input terminal and output end of the artifical resistance bridge
Monitor is electrically connected with the single-chip microcontroller of model STC89C52, and ring peak device and LED light are provided on the single-chip microcontroller.
Further, the multi-thread core magnet exciting coil is that more single-core cable coilings form.
Compared with prior art, the utility model has the beneficial effects that
Rotor one end in the utility model is by ground wire grounded, and when one point earth occurs in multi-thread magnet exciting coil,
Calibration balance is carried out to the voltage and current in multi-thread magnet exciting coil by artifical resistance bridge, occurs one in the excitation winding of rotor
When point ground connection, by AC/DC module, current potential midpoint applies neutral earthing voltage, while the artifical resistance in artifical resistance bridge
Voltage monitor is parallel between the input terminal and output end of bridge, the voltage monitor is electrically connected with the list of model STCC
Piece machine, and ring peak device and LED light are provided on the single-chip microcontroller, wherein artifical resistance bridge is obtained according to bridge balance principle
When the ratio between the voltage of excitation resistance of detection voltage and rotor on voltage monitor is between 0-0.5, always generate a bit
Ground connection, buzzer and LED light flashing alarm, voltage monitor will test signal and feed back to single-chip microcontroller, single-chip microcontroller control at this time
The output voltage of AC/DC module processed, so that the voltage of the excitation resistance of the output DC voltage and rotor of AC/DC module is at 2 times
Relationship, the dead zone monitored when to overcoming one point earth, while generating in ground connection and timely alarming, while multi-thread excitation is set
The earthing potential dynamic that coil carries out artifical resistance bridge central potential point compensates, and reduces failure residual current when one point earth.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Figure label:
1- insulating base；2- rotor；3- insulation rotor set；4- is grounded rotor set；5- ground wire；6- insulation bearing；7- simulation electricity
Hinder bridge；8- sliding ring A；9- sliding ring B；The multi-thread core magnet exciting coil of 10-；11-AC/DC module；12- single-chip microcontroller；Magnetic draws in 13-
Line；14- voltage monitor.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, the utility model provides a kind of motor ground fault detection warning device, including 1 He of insulating base
Rotor 2, and the insulation rotor set 3 and ground connection rotor set 4 of 1 upper surface two sides of insulating base are set, in the ground connection rotor set 4
Portion is provided through the ground wire 5 of insulating base 1, and the both ends of the rotor 2 are mounted on insulation rotor set 3 by insulation bearing 6 and connect
On ground rotor set 4, the insulating base 1 is internally provided with artifical resistance bridge 7, and the both ends of the rotor 2 are respectively installed with sliding ring
A8 and sliding ring B9, and be located on the inboard sliding ring A8 of insulation rotor set 3 and be connected with multi-thread core magnet exciting coil 10, it is described more
The lead of line magnet exciting coil 10 passes through insulating base 1 and is connected on artifical resistance bridge 7, and the artifical resistance bridge 7 is connected by lead
On being located at the inboard sliding ring B9 of node rotor set, AC/DC module 11, and the AC/ are additionally provided with inside the insulating base 1
The output end of DC module 12 is electrically connected on artifical resistance bridge 7, is connected with interior magnetic between the sliding ring A8 and sliding ring B9
Lead 13.
2 one end of rotor in the utility model is grounded by ground wire 5, and one point earth occurs in multi-thread magnet exciting coil 10
When, calibration balance is carried out to the voltage and current in multi-thread magnet exciting coil 10 by artifical resistance bridge 7, in the excitation winding of rotor 2
When middle generation one point earth, by AC/DC module 12, current potential midpoint applies neutral earthing voltage in artifical resistance bridge 7, simultaneously
Voltage monitor 14 is parallel between the input terminal and output end of the artifical resistance bridge 7, the voltage monitor 14 electrically connects
It is connected to the single-chip microcontroller 15 of model STC89C52, and is provided with ring peak device and LED light on the single-chip microcontroller 15, wherein mould
Quasi- resistance bridge 7 obtains the electricity when the excitation resistance of detection voltage and rotor 2 on voltage monitor 14 according to bridge balance principle
When the ratio between pressure is between 0-0.5, one point earth is always generated, at this time buzzer and LED light flashing alarm, voltage monitoring
Device 14 will test signal and feed back to single-chip microcontroller 15, and single-chip microcontroller 15 controls the output voltage of AC/DC module 12, so that AC/DC module
The voltage of the excitation resistance of 12 output DC voltage and rotor 2 monitors dead at 2 times of relationships, when to overcoming one point earth
Area, while generating in ground connection and timely alarming, while multi-thread magnet exciting coil 10 is set and carries out 7 central potential point of artifical resistance bridge
Earthing potential dynamic compensate, reduce one point earth when failure residual current.
The artifical resistance bridge 7 is connected on ground wire 5 by lead, and the AC/DC module 12 is connected on artifical resistance bridge 7
On lead between ground wire 5.
The multi-thread core magnet exciting coil 10 is that more single-core cable coilings form.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
Claims (4)
1. a kind of motor ground fault detection warning device, it is characterised in that: including insulating base (1) and rotor (2), and setting
Insulation rotor set (3) and ground connection rotor set (4) in insulating base (1) upper surface two sides, the internal setting of the ground connection rotor set (4)
There is the ground wire (5) across insulating base (1), the both ends of the rotor (2) are mounted on insulation rotor set (3) by insulation bearing (6)
On ground connection rotor set (4), the insulating base (1) is internally provided with artifical resistance bridge (7), the both ends difference of the rotor (2)
Be set with sliding ring A (8) and sliding ring B (9), and be located on the sliding ring A (8) of insulation rotor set (3) inboard be connected with it is multi-thread
Core magnet exciting coil (10), the lead of the multi-thread core magnet exciting coil (10) pass through insulating base (1) and are connected to artifical resistance bridge (7)
On, the artifical resistance bridge (7) is connected on the inboard sliding ring B (9) of node rotor set by lead, the insulating base
(1) internal to be additionally provided with AC/DC module (11), and the output end of the AC/DC module (11) is electrically connected at artifical resistance bridge
(7) on, interior magnetic lead (13) is connected between the sliding ring A (8) and sliding ring B (9).
2. a kind of motor ground fault detection warning device according to claim 1, it is characterised in that: the artifical resistance
Bridge (7) is connected on ground wire (5) by lead, the AC/DC module (11) be connected on artifical resistance bridge (7) and ground wire (5) it
Between lead on.
3. a kind of motor ground fault detection warning device according to claim 1, it is characterised in that: the artifical resistance
It is parallel between the input terminal and output end of bridge (7) voltage monitor (14), the voltage monitor (14) is electrically connected with type
Number it is the single-chip microcontroller (12) of STC89C52, and is provided with ring peak device and LED light on the single-chip microcontroller (12).
4. a kind of motor ground fault detection warning device according to claim 1, it is characterised in that: the multi-thread core is encouraged
Magnetic coil (10) is that more single-core cable coilings form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820871068.0U CN208432702U (en) | 2018-06-06 | 2018-06-06 | A kind of motor ground fault detection warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820871068.0U CN208432702U (en) | 2018-06-06 | 2018-06-06 | A kind of motor ground fault detection warning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208432702U true CN208432702U (en) | 2019-01-25 |
Family
ID=65101239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820871068.0U Expired - Fee Related CN208432702U (en) | 2018-06-06 | 2018-06-06 | A kind of motor ground fault detection warning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208432702U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521938A (en) * | 2020-05-06 | 2020-08-11 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | One-point grounding diagnosis method and device for generator excitation system |
-
2018
- 2018-06-06 CN CN201820871068.0U patent/CN208432702U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521938A (en) * | 2020-05-06 | 2020-08-11 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | One-point grounding diagnosis method and device for generator excitation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101799518B (en) | Online monitoring and grounding protection methods of insulation of generator stator core tightening screw rods | |
| JP2003079102A (en) | Protective monitor for generator and method for using such protective monitor | |
| CN101988945A (en) | Method for diagnosing interturn short circuit of rotor winding | |
| CN110514902A (en) | Generator excitation watt insulator resistor detecting device | |
| CN208432702U (en) | A kind of motor ground fault detection warning device | |
| Moosavi et al. | Fault detection in 3-phase traction motor using artificial neural networks | |
| CN203396916U (en) | Generator rotating rectifier detection device | |
| Srivastava et al. | Simulation models for different power system faults | |
| CN108919123B (en) | Brushless excitation generator measuring device and measuring method thereof | |
| CN114563670A (en) | On-line monitoring device and method for insulation of impact capacitor in generator outlet circuit breaker | |
| Barater et al. | Diagnosis of incipient faults in PMSMs with coaxially insulated windings | |
| Deeb et al. | Fault diagnosis of 3-phase induction machine using harmonic content of stator current spectrum | |
| JP2006200898A (en) | Interrupt insulation measuring device | |
| CN103770650B (en) | Locomotive traction and aid system Integral grounding protection device | |
| CN208257390U (en) | A kind of device preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine | |
| CN203350397U (en) | Abnormal noise inspection device of high voltage sealed switch cabinet or sealed bus bar | |
| CN202190057U (en) | Generator grounding protective device | |
| CN214953952U (en) | Capacitor power-taking switch with fault diagnosis function | |
| CN201813146U (en) | Shaft current relay protection device of hydro-generator | |
| CN211786025U (en) | Station power supply system direct current bus ring network detection device | |
| CN209488166U (en) | A kind of generator neutral point earthing or grounding means | |
| CN209419316U (en) | A kind of power distribution network low pressure quickly turns power supply unit | |
| CN216056716U (en) | Improved through-flow hydraulic generator neutral point grounding device | |
| CN221007835U (en) | Novel alarm structure in withstand voltage AC/DC test overcurrent hardware | |
| CN215267641U (en) | Generator shaft voltage peak suppression device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190125 Termination date: 20190606 |