CN208092119U - A kind of voltage dip on-Line Monitor Device - Google Patents
A kind of voltage dip on-Line Monitor Device Download PDFInfo
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- CN208092119U CN208092119U CN201820293668.3U CN201820293668U CN208092119U CN 208092119 U CN208092119 U CN 208092119U CN 201820293668 U CN201820293668 U CN 201820293668U CN 208092119 U CN208092119 U CN 208092119U
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Abstract
The utility model provides a kind of voltage dip on-Line Monitor Device, including babinet, and the babinet is enclosed by two top panel, lower panel, front panel, rear panel and left and right side panels；Guide-track groove is equipped on the babinet top panel and lower panel, the guide-track groove on the top panel and lower panel is symmetrically set, and multiple circuit boards are fixed in the guide-track groove.The utility model is small, is easily installed, and can be directly mounted on cabinet door for power distributing cabinet, easy to operation and observation.
Description
Technical field
The utility model is related to technical field of power systems more particularly to a kind of voltage dip on-Line Monitor Devices.
Background technology
With the development of power electronic devices, especially computer equipment, microelectronic device and power electronic equipment etc.
Sensitive load is continuously increased so that requirement of the power consumer to distribution system power supply quality increasingly improves.Meanwhile voltage dip
Various sensitive electrical equipment normal works are seriously affected, huge loss is caused.Frequency converter belongs to sensitive equipment, and supply side occurs
Voltage dip is easy to bring it about delay machine, and then influences the normal operation of load.Main circuit of frequency converter is by rectification circuit, filtered electrical
Road and inverter circuit composition, voltage dip will generate Different Effects for the links of main circuit of frequency converter, to make frequency conversion
Device output voltage also will produce influence to load, and current monitoring device is to monitor the supply side voltage of frequency converter, but supervise
The rectifying and wave-filtering voltage and inverter output voltage for surveying frequency converter have important application value.
Utility model content
Technical problem to be solved by the utility model is to provide it is a kind of it is small, be easily installed, easy to operation and see
The voltage dip on-Line Monitor Device examined.
In order to solve the above-mentioned technical problem, the utility model provides a kind of voltage dip on-Line Monitor Device, including babinet,
The babinet is enclosed by two top panel, lower panel, front panel, rear panel and left and right side panels；Above the babinet
Guide-track groove is equipped on plate and lower panel, the guide-track groove on the top panel and lower panel is symmetrically set, the guide-track groove
Inside it is fixed with multiple circuit boards.
Wherein, the circuit board includes：Master control borad, alternating voltage detection plate, the direct current being connected with each other by bus board
Press detection plate and inverter voltage detection plate；
The alternating voltage detection plate connects the input side of frequency converter by voltage transformer, for detecting the defeated of frequency converter
Enter side alternating voltage；
The DC voltage detection plate connects the rectifying and wave-filtering side of frequency converter by DC voltage transmitter, becomes for detecting
The rectifying and wave-filtering voltage of frequency device；
The inverter voltage detection plate connects the outlet side of frequency converter by transformer, and the inversion for detecting frequency converter is defeated
Go out voltage.
Wherein, the voltage dip on-Line Monitor Device further includes display board, the master control borad, alternating voltage detection plate,
DC voltage detection plate and inverter voltage detection plate are connect by bus board with the display board.
Wherein, the voltage dip on-Line Monitor Device further includes power panel, the master control borad, alternating voltage detection plate,
DC voltage detection plate and inverter voltage detection plate are connect by bus board with the power panel.
Wherein, the inverter voltage detection plate is equipped with central processing unit, LC filters and zero-crossing comparator, the LC filters
The input terminal of wave device connects the outlet side of the transformer, and the input side of the transformer connects inversion output voltage,
The input terminal of the central processing unit is separately connected the output end of the output end and the zero-crossing comparator of the LC filters, institute
The output end for stating central processing unit connects the master control borad.
Wherein, the LC filters specifically include filter inductance, filter capacitor and sampling resistor, the Zero-cross comparator utensil
Body includes operational amplifier and current-limiting resistance, and one end of the filter inductance connects the first end of the outlet side of the transformer,
The other end connects the filter capacitor, and the other end of the filter capacitor connects the second end of the outlet side of the transformer, institute
It states sampling resistor and is connected in parallel on the both ends of filter capacitor, one end of the sampling resistor connects the fortune by the current-limiting resistance
The reverse input end of amplifier is calculated, the other end of the sampling resistor connects the noninverting input of the operational amplifier, described
The output end of operational amplifier connects the input terminal of the central processing unit in the inverter voltage detection plate.
Wherein, the master control borad is equipped with memory, described to deposit when voltage dip occurs for the input side alternating voltage
Reservoir stores the sampled data of the input side alternating voltage, rectifying and wave-filtering voltage and inverter output voltage.
Wherein, the babinet front panel is equipped with display window, indicator light and operation button, and the cabinet rear panel is equipped with
Multiple connecting terminals.
The advantageous effect of the utility model embodiment is：It is small, be easily installed, cabinet door for power distributing cabinet can be directly mounted at
On, easy to operation and observation.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the structural schematic diagram of the utility model voltage dip on-Line Monitor Device.
Fig. 2 is the rearview of the utility model voltage dip on-Line Monitor Device.
Fig. 3 is the sectional view of the utility model voltage dip on-Line Monitor Device.
Fig. 4 is the systematic schematic diagram of the utility model voltage dip on-Line Monitor Device.
Fig. 5 is the voltage waveform transition diagram of each voltage circuit of frequency converter.
Fig. 6 is detection principle diagram of the utility model voltage dip on-Line Monitor Device to inversion output voltage.
Fig. 7 is detection circuit figure of the utility model voltage dip on-Line Monitor Device to inversion output voltage.
Fig. 8 is waveform transition diagram of the utility model voltage dip on-Line Monitor Device to inversion output voltage.
Specific implementation mode
The explanation of following embodiment is refer to the attached drawing, can be to the particular implementation implemented to example the utility model
Example.
As shown in Fig. 1 ~ 3, the utility model voltage dip on-Line Monitor Device, including babinet 1, babinet 1 by top panel 8,
Two lower panel 9, front panel 2, rear panel 6 and left and right side panels（Left panel 14 and right panel 10）It encloses；Before babinet 1
Panel 2 is equipped with display window 3, multiple indicator lights 4 and multiple operation buttons 5；1 rear panel 6 of babinet is equipped with multiple connecting terminals
7, rear panel 6 is fixed on by fastening screw on babinet 1；It is equipped with guide-track groove 11 on 1 top panel 8 of babinet and lower panel 9, above
Guide-track groove 11 on plate 8 and lower panel 9 is symmetrically set, and circuit board 12 is fixed in the guide-track groove 11 being symmetrically set,
The side panel of babinet 1（Left panel 14 and right panel 10）Upper and lower two ends respectively by fastening screw with the upper of guide-track groove 11
Panel 8 and lower panel 9 are fixed.
As shown in figure 4, the utility model voltage dip on-Line Monitor Device include master control borad, it is alternating voltage detection plate, straight
Galvanic electricity presses detection plate, inverter voltage detection plate, display board and power panel；Master control borad, alternating voltage detection plate, DC voltage inspection
Drafting board, inverter voltage detection plate, display board and power panel are connected with each other by bus board；Alternating voltage detection plate passes through voltage
Mutual inductor（PT）The input side for connecting frequency converter, for detecting the input side three-phase voltage of frequency converter；DC voltage detection plate is logical
The rectifying and wave-filtering side for crossing DC voltage transmitter connection frequency converter, for detecting the rectifying and wave-filtering voltage of frequency converter；Inverter voltage
Detection plate connects the outlet side of frequency converter by transformer, for detecting inversion output voltage.Utility model device
Three detection plates（Alternating voltage detection plate, DC voltage detection plate and inverter voltage detection plate）Monitoring input AC electricity in real time
Pressure, rectifying and wave-filtering voltage and inverter output voltage, when voltage dip occurs for input side alternating voltage, the record of trigger device
Wave energy, device is simultaneously to three road voltages（Input ac voltage, rectifying and wave-filtering voltage and inverter output voltage）Carry out recording.This
Device by recording function can analysis voltage temporarily influence of the drop to each voltage circuit of frequency converter, and then when analyzing voltage dip
Influence of the frequency converter output voltage to load.
As shown in figure 5, the waveform of frequency converter input voltage is AC sine wave, become direct current after current rectifying and wave filtering circuit
Then waveform becomes modulating pulse wave shape after inverter circuit.
As shown in fig. 6, inverter voltage detection plate is equipped with centre in the utility model voltage dip on-Line Monitor Device
Device CPU, LC filter and zero-crossing comparator are managed, the input side of transformer T connects inversion output voltage, transformer T's
Outlet side connects the input terminal of LC filters；The input terminal of the output end connection zero-crossing comparator of LC filters, inverter voltage inspection
CPU input terminals are separately connected the output end of LC filters and the output end of zero-crossing comparator in drafting board；CPU output ends connect master control
Plate.Inversion output voltage becomes the SPWM of small signal after transformer（Sinusoidal PWM, sinusoid pulse width modulation
Modulation）Waveform, small signal S PWM waveform become sine wave, sine wave side of becoming after zero-crossing comparator after LC filters
The CPU of wave, inverter voltage detection plate calculates the frequency of sine wave, resets sampling frequency by being counted to above-mentioned square wave
Rate, to reach frequency-tracking processing.
As shown in fig. 7, the input side of inversion output voltage connection transformer T, the first end of transformer T outlet sides
One end of filter inductance L is connected, the filter inductance L other ends connect filter capacitor C, and it is defeated that the filter capacitor C other ends connect transformer T
Go out the second end of side, sampling resistor R1 is connected in parallel on the both ends filter capacitor C, and the one end sampling resistor R1 is connected to by current-limiting resistance R2
The reverse input end of operational amplifier A, the sampling resistor R1 other ends are connected to the noninverting input of operational amplifier A, and operation is put
The output end of big device A connects CPU input terminals in inverter voltage detection plate, and CPU output ends connect master control in inverter voltage detection plate
Plate.
As shown in figure 8, inversion output voltage connects transformer, the waveform of inversion output voltage（Itself
For modulating pulse wave shape）After being converted into sine wave by LC filters, square wave, inverter voltage inspection are obtained using zero-crossing comparator
CPU counts square wave and calculates the frequency of current sinusoidal wave in drafting board, then adjusts the sample frequency to sine wave, from
And reach frequency-tracking.The impulse modulation waveform of inversion output voltage by being converted into sine by utility model device
It is monitored again after wave.
In conclusion compared with prior art, the utility model embodiment has the advantages that：
It is small, be easily installed, can be directly mounted on cabinet door for power distributing cabinet, it is easy to operation and observation；
The utility model is by detecting frequency converter input side alternating voltage, when voltage dip occurs while recording frequency converter
Input ac voltage, frequency converter rectifying and wave-filtering voltage and inversion output voltage pass through the further place to recorder data
Reason can analyze influence of the voltage dip to frequency converter rectifying and wave-filtering voltage and inversion output voltage, and then analyze
Influence of the frequency converter inverter output voltage to load when voltage dip；
The utility model voltage dip on-Line Monitor Device can be simultaneously to frequency converter input side alternating voltage, frequency converter rectification
Filtering voltage and inversion output voltage are monitored, and utility model device is by circuit design by inversion
The impulse modulation waveform of output voltage is converted into sine wave, to realize the monitoring to inversion output voltage.
Above disclosures are merely preferred embodiments of the utility model, with this utility model cannot be limited certainly
Interest field, therefore equivalent variations made according to the claim of the utility model still fall within the scope of the utility model.
Claims (7)
1. a kind of voltage dip on-Line Monitor Device, it is characterised in that：Including babinet, the babinet is by top panel, lower panel, preceding
Two panel, rear panel and left and right side panels enclose；It is equipped with guide-track groove on the babinet top panel and lower panel, institute
The guide-track groove stated on top panel and lower panel is symmetrically set, and multiple circuit boards are fixed in the guide-track groove；
The circuit board includes：By bus board be connected with each other master control borad, alternating voltage detection plate, DC voltage detection plate and
Inverter voltage detection plate；
The alternating voltage detection plate connects the input side of frequency converter, the input side for detecting frequency converter by voltage transformer
Alternating voltage；
The DC voltage detection plate connects the rectifying and wave-filtering side of frequency converter by DC voltage transmitter, for detecting frequency converter
Rectifying and wave-filtering voltage；
The inverter voltage detection plate connects the outlet side of frequency converter by transformer, and the inversion for detecting frequency converter exports electricity
Pressure.
2. voltage dip on-Line Monitor Device according to claim 1, which is characterized in that further include display board, the master
Plate, alternating voltage detection plate, DC voltage detection plate and inverter voltage detection plate is controlled to connect by bus board and the display board
It connects.
3. voltage dip on-Line Monitor Device according to claim 1, which is characterized in that further include power panel, the master
Plate, alternating voltage detection plate, DC voltage detection plate and inverter voltage detection plate is controlled to connect by bus board and the power panel
It connects.
4. voltage dip on-Line Monitor Device according to claim 1, which is characterized in that in the inverter voltage detection plate
Equipped with central processing unit, LC filters and zero-crossing comparator, the input terminal of the LC filters connects the output of the transformer
The input side of side, the transformer connects inversion output voltage, and the input terminal of the central processing unit is separately connected institute
The output end of the output end and the zero-crossing comparator of LC filters is stated, the output end of the central processing unit connects the master control
Plate.
5. voltage dip on-Line Monitor Device according to claim 4, which is characterized in that the LC filters specifically include
Filter inductance, filter capacitor and sampling resistor, the zero-crossing comparator specifically include operational amplifier and current-limiting resistance, the filter
One end of wave inductance connects the first end of the outlet side of the transformer, and the other end connects the filter capacitor, the filtered electrical
The other end of appearance connects the second end of the outlet side of the transformer, and the sampling resistor is connected in parallel on the both ends of filter capacitor,
One end of the sampling resistor connects the reverse input end of the operational amplifier, the sampling resistor by the current-limiting resistance
The other end connect the noninverting input of the operational amplifier, the output end of the operational amplifier connects the inverter voltage
The input terminal of central processing unit in detection plate.
6. voltage dip on-Line Monitor Device according to claim 1, which is characterized in that the master control borad is equipped with storage
Device, when voltage dip occurs for the input side alternating voltage, the memory is to the input side alternating voltage, rectifying and wave-filtering
The sampled data of voltage and inverter output voltage is stored.
7. voltage dip on-Line Monitor Device according to claim 1, which is characterized in that the babinet front panel is equipped with
Display window, indicator light and operation button, the cabinet rear panel are equipped with multiple connecting terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820293668.3U CN208092119U (en) | 2018-03-02 | 2018-03-02 | A kind of voltage dip on-Line Monitor Device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820293668.3U CN208092119U (en) | 2018-03-02 | 2018-03-02 | A kind of voltage dip on-Line Monitor Device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208092119U true CN208092119U (en) | 2018-11-13 |
Family
ID=64061389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820293668.3U Active CN208092119U (en) | 2018-03-02 | 2018-03-02 | A kind of voltage dip on-Line Monitor Device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208092119U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054529A (en) * | 2020-08-31 | 2020-12-08 | 广东电网有限责任公司 | Voltage support equipment and control method thereof |
| CN112291984A (en) * | 2020-11-04 | 2021-01-29 | 南京巴斯勒自动化设备有限公司 | Voltage sag monitoring device |
-
2018
- 2018-03-02 CN CN201820293668.3U patent/CN208092119U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054529A (en) * | 2020-08-31 | 2020-12-08 | 广东电网有限责任公司 | Voltage support equipment and control method thereof |
| CN112291984A (en) * | 2020-11-04 | 2021-01-29 | 南京巴斯勒自动化设备有限公司 | Voltage sag monitoring device |
| CN112291984B (en) * | 2020-11-04 | 2022-04-22 | 南京巴斯勒自动化设备有限公司 | Voltage sag monitoring device |
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