CN209342787U - A kind of voltage transformer integrated high pressure resitstance voltage divider - Google Patents
A kind of voltage transformer integrated high pressure resitstance voltage divider Download PDFInfo
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- CN209342787U CN209342787U CN201821986970.3U CN201821986970U CN209342787U CN 209342787 U CN209342787 U CN 209342787U CN 201821986970 U CN201821986970 U CN 201821986970U CN 209342787 U CN209342787 U CN 209342787U
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Abstract
The utility model relates to a kind of voltage transformer integrated high pressure resitstance voltage divider, solve the problems, such as that existing voltage transformer presence is unfavorable for mass production and stability is difficult to improve.The highvoltage resistance potential divider includes high-voltage arm resistance R1And low-voltage arm resistance, the high-voltage arm resistance R1It is formed with low-voltage arm resistance using the coiling on a ceramic rod of same resistance wire.
Description
Technical field
The utility model relates to voltage transformer fields, and in particular to a kind of voltage transformer integrated high pressure resistance point
Depressor.
Background technique
Voltage transformer is the critical elements that voltage measurement is used in electric system, and accuracy of measurement and reliability are to electricity
Force system is safe and stable and economical operation has important influence.Electromagnetic potential transformer, electricity are mainly used in electric system
Electromagnetic type voltage transformer has the advantages such as measurement accuracy height, manufacturing process maturation, method of inspection specification in the linear range.But by
The limitation of electromagnetic transformer mechanism, electromagnetic potential transformer is big with volume, dynamic range is small, is easy to happen ferromagnetic resonance
The disadvantages of so as to cause overvoltage and output terminal shortcircuit.On the other hand, with Microcomputer Protection technology and modern microelectronic technology
Fast development, relay protection and secondary device no longer need high-power driving, traditional voltage transformer secondary output 100V or
The voltage signal of person 100V/ √ 3 cannot directly be connected with microcomputer, it is difficult to adapt to Automation of Electric Systems, digitlization and intelligence
Development trend.Based on disadvantages described above, electronic type voltage transformer is applied and is given birth to.
As shown in Figure 1 and Figure 2, existing electronic type voltage transformer is mainly made of highvoltage resistance potential divider and debugging unit,
Wherein R1For high-voltage arm resistance, R2Voltage division formulas for low-voltage arm resistance, series resistance isSuch electricity
The main problem of minor voltage transformer is:
1. electronic type voltage transformer is debugged, amplitude is adjusted and phase compensation is both for R2Operation, amplitude adjust and
Phase compensation influences each other, and larger, debugging is complicated.Such as amplitude is transferred in precision, then by phase compensation to precision, at this moment
The amplitude regulated can have greatly changed, and need to readjust, and it is suitable that amplitude is adjusted, and phase may change, such as
This again and again increases debugging difficulty, reduces production efficiency；
2. electronic type voltage transformer amplitude is adjusted, resistance R is adjusted2Performance be affected to the precision of product, this
The quality requirement for just exchanging economize on electricity resistance is very high, and leading to product, the production cost increases；
3. the high-voltage arm and low-voltage arm of highvoltage resistance potential divider are not integral structures, nor one-pass molding.To single
The required precision of resistance value is higher, is unfavorable for resistance mass production；If the precision of single resistance is too low, band can be debugged to the later period
Carry out very big inconvenience, is unfavorable for the batch production of mutual inductor；
4. high-voltage arm used in electronic type voltage transformer and low-voltage arm are not same material, extraneous factor (temperature, electricity
Pressure etc.) variation when, the change rate of high-voltage arm and low-voltage arm resistance is inconsistent, be easy by extraneous factor interference, lead to mutual inductor
Stability be difficult to improve.
Utility model content
The purpose of this utility model is that the existing voltage transformer presence of solution is unfavorable for mass production and stability is difficult
The problem of to improve, provides a kind of voltage transformer integrated high pressure resitstance voltage divider, sensor stabilization with higher
Property and reliability.
The technical solution that the utility model solves the above problems is as follows:
A kind of voltage transformer integrated high pressure resitstance voltage divider, including high-voltage arm resistance R1And low-voltage arm resistance, institute
State high-voltage arm resistance R1It is formed with low-voltage arm resistance using the coiling on a ceramic rod of same resistance wire.
Further, the low-voltage arm resistance is provided with multiple taps.
Further, the low-voltage arm resistance includes concatenated first low-voltage arm resistance R2With the second low-voltage arm resistance R3；Institute
State high-voltage arm resistance R1First end connect with high voltage transmission line, high-voltage arm resistance R1Second end and the first low-voltage arm resistance R2
First end connection, the first low-voltage arm resistance R2Second end and the second low-voltage arm resistance R3First end connection, described the
Two low-voltage arm resistance R3Second end ground connection.
It further, further include having ground resistance, the first end of the ground resistance and the second low-voltage arm resistance R3?
The connection of two ends, the second end ground connection of the ground resistance.
Further, the low-voltage arm resistance further includes concatenated m third low-voltage arm resistance R4, m third low-voltage arm
Resistance R4It is connected on the second low-voltage arm resistance R3Second end, m >=1.
It further, further include having ground resistance, the first end and end third low-voltage arm resistance R of the ground resistance4
Second end connection, the ground connection of the second end of the ground resistance.
Further, the high-voltage arm resistance R1Resistance value between 30 megaohms~80 megaohms, the resistance value of low-voltage arm resistance
Between 15k Ω~25k Ω；The high-voltage arm resistance R1Resistance value ratio with low-voltage arm resistance is 3076:1 or 2659:1.
The utility model has the following beneficial effects:
1. voltage transformer provided by the utility model is by high-voltage arm resistance R1Integrated knot is set as with low-voltage arm resistance
Structure only requires the no-load voltage ratio precision of height piezoresistance, does not require the precision of single resistance, improves the yield rate of resistance, be conducive to
Mass production；Amplitude is adjusted simultaneously and phase compensation is adjusted and separately carried out, and is reduced influencing each other between the two, is facilitated tune
Section, improves production efficiency.
2. the high-voltage arm resistance R of the highvoltage resistance potential divider of the utility model electronic type voltage transformer1Exist with low-voltage arm
The same time is made of same material and same technique, in extraneous factor (voltage, temperature etc.) variation, high-voltage arm
Resistance R1It is consistent with low-voltage arm resistance change rate, product is reduced to the susceptibility of external environment, improves the stability of product.
3. the utility model electronic type voltage transformer mesohigh resitstance voltage divider segment signal output uses multi-tap side
Formula (increases and adjusts resistance R3), amplitude is adjusted and phase compensation separately carries out, and reduces influencing each other between the two, side
Just it adjusts, improves production efficiency, while by the high-voltage arm resistance R of highvoltage resistance potential divider1One is set as with low-voltage arm resistance
Body structure only requires the no-load voltage ratio precision of height piezoresistance, does not require the precision of single resistance, improves the yield rate of resistance,
Be conducive to mass production.
4. the amplitude metering needle of the utility model electronic type voltage transformer is to resistance R3It is operated, reduces adjusting electricity
The requirement and production cost of resistance, convenient for large-scale production.
5. the low potential of the output signal of the utility model electronic type voltage transformer has ground connection and earth-free two kinds realizations
Mode can both match DTU/FTU low potential earthed system, can also match the hanging system of low potential；After increasing ground resistance,
Both the system that can be used for low potential ground connection, can be used for the earth-free system of low potential.
Detailed description of the invention
Fig. 1 is existing electronic voltage transducer schematic illustration；
Fig. 2 is existing voltage sensor schematic diagram；
Fig. 3 is one schematic diagram of the utility model electricity multi-tap voltage transformer embodiment；
Fig. 4 is two schematic diagram of the utility model electricity multi-tap voltage transformer embodiment；
Fig. 5 is that amplitude adjusts circuit diagram；
Fig. 6 is phase compensating circuit schematic diagram.
Specific embodiment
It is described in further detail below in conjunction with content of the drawings and specific embodiments to the utility model:
The utility model provides a kind of voltage transformer integrated high pressure resitstance voltage divider, including high-voltage arm resistance R1With
Low-voltage arm resistance, high-voltage arm resistance R1It is formed with low-voltage arm resistance using the coiling on a ceramic rod of same resistance wire.It is low
Pressure arm resistance is provided with multiple taps.
As shown in figure 3, the voltage transformer integrated high pressure resitstance voltage divider of the utility model includes high-voltage arm resistance
R1And low-voltage arm resistance；Low-voltage arm resistance includes the first low-voltage arm resistance R of series connection2, the second low-voltage arm resistance R3；High-voltage arm resistance
R1First end connect with high voltage transmission line, high-voltage arm resistance R1Second end and the first low-voltage arm resistance R2First end connection,
First low-voltage arm resistance R2Second end and the second low-voltage arm resistance R3First end connection, the second low-voltage arm resistance R3Second
End ground connection.Adjusting unit includes that amplitude adjusts circuit and phase compensating circuit, the second low-voltage arm resistance R3Both ends connect amplitude
Adjust circuit；First low-voltage arm resistance R2First end and the second low-voltage arm resistance R3Second end connect phase compensating circuit, or
Person's phase compensating circuit is connected to the second low-voltage arm resistance R3Both ends.
In other embodiments, resitstance voltage divider further includes having ground resistance, the first end of ground resistance and the second low pressure
Arm resistance R3Second end connection, the ground connection of the second end of ground resistance.
As shown in Figure 4, Figure 5, amplitude metering needle is to the second low-voltage arm resistance R3Operation, phase compensation are directed to R2+R3Operation or
For resistance R3Operation.Amplitude adjusts circuit and phase compensating circuit is available circuit, and it includes multiple strings that amplitude, which adjusts circuit,
The resistance of connection, phase compensating circuit include the capacitor of multiple parallel connections, and amplitude, which adjusts circuit, to be existed with the resistor coupled in parallel of suitable resistance value
Second low-voltage arm resistance R3Resistance both ends, are adjusted amplitude；Phase compensating circuit is in parallel using the capacitor of suitable capacitance
In R2+R3Both ends compensate phase.
The high-voltage arm resistance R of highvoltage resistance potential divider1It is integrated with low-voltage arm resistance, specially high and low pressure arm
For resistance using same resistance wire using being wound on above a ceramic rod by the way of noninductive, the resistance of low-voltage arm resistance is from total
Resistance wire in separate the resistance values of needs, the voltage division formulas of series resistance are as follows:
Alternatively,
The high-voltage arm resistance R of the utility model voltage transformer1It is integrated with low-voltage arm resistance, only requires height
The no-load voltage ratio precision of piezoresistance, it is lower for the required precision of single resistance, the yield rate of resistance is improved, batch metaplasia is conducive to
It produces.High-voltage arm resistance R1It with low-voltage arm in the same time, is made of same material and same technique, extraneous factor (electricity
Pressure, temperature etc.) variation when, high-voltage arm resistance R1It is consistent with low-voltage arm resistance change rate, product is reduced to the quick of external environment
Sensitivity improves the stability of product.
Specifically, high-voltage arm resistance R1Resistance value between 30 megaohms~80 megaohms, the resistance value of low-voltage arm resistance is in 15k Ω
Between~25k Ω.High-voltage arm resistance R1Be decided according to the actual requirements with the resistance value ratio of low-voltage arm resistance, for example, 3070:1 or
2659:1。
The utility model electronic type voltage transformer mesohigh resitstance voltage divider segment signal output uses three tap modes
It (increases and adjusts resistance R3), amplitude is adjusted and phase compensation separately carries out, and reduces influencing each other between the two, convenient
It adjusts, improves production efficiency, amplitude metering needle is to resistance R3It is operated, reduces the resistance requirement and production of adjusting
Cost, convenient for large-scale production.
As shown in figure 4, the high-voltage arm resistance R of the highvoltage resistance potential divider of mutual (biography) sensor of electronic type voltage1, the first low pressure
Arm resistance R2、R3, ground resistance RGround connectionIt can be replaced with the concatenated mode of multiple resistance.Amplitude adjusting can also pass through multi-tap
It adjusts, debugging when only needs to be adjusted for one of resistor tap, also can achieve this purpose.?
That is low-voltage arm resistance can also include m third low-voltage arm resistance R4, m >=1；M third low-voltage arm resistance R4Resistance value
It may be the same or different, amplitude adjusting is electrically connected to the second low-voltage arm resistance R3Or any third low-voltage arm resistance R4's
Both ends；Phase compensating circuit is connected to the first low-voltage arm resistance R2First end and end third low-voltage arm resistance R4Second end；
Or phase compensating circuit is connected to the second low-voltage arm resistance R3Or any third low-voltage arm resistance R4Both ends.
The utility model is directed to any resistance adjustment in low-voltage arm resistance, rather than is directed to entire low-voltage arm resistance tune
Section, so phase compensation and amplitude compensation influence each other and can be ignored, and adjustment process becomes simply, fast when debugging.Width
Value complement is repaid to be carried out just in any resistance, and debugging resistance influences very little for the precision of product, selects conventional, electric-resistance
It meets the requirements.
Claims (7)
1. a kind of voltage transformer integrated high pressure resitstance voltage divider, it is characterised in that: including high-voltage arm resistance R1And low-voltage arm
Resistance, the high-voltage arm resistance R1It is formed with low-voltage arm resistance using the coiling on a ceramic rod of same resistance wire.
2. voltage transformer integrated high pressure resitstance voltage divider according to claim 1, it is characterised in that: the low-voltage arm
Resistance is provided with multiple taps.
3. voltage transformer integrated high pressure resitstance voltage divider according to claim 2, it is characterised in that: the low-voltage arm
Resistance includes concatenated first low-voltage arm resistance R2With the second low-voltage arm resistance R3；The high-voltage arm resistance R1First end and high
Press power transmission line connection, high-voltage arm resistance R1Second end and the first low-voltage arm resistance R2First end connection, first low-voltage arm
Resistance R2Second end and the second low-voltage arm resistance R3First end connection, the second low-voltage arm resistance R3Second end ground connection.
4. voltage transformer according to claim 3 integrated high pressure resitstance voltage divider, it is characterised in that: further include having
Ground resistance, the first end of the ground resistance and the second low-voltage arm resistance R3Second end connection, the of the ground resistance
Two ends ground connection.
5. voltage transformer according to claim 3 integrated high pressure resitstance voltage divider, it is characterised in that: the low pressure
Arm resistance further includes concatenated m third low-voltage arm resistance R4, m third low-voltage arm resistance R4It is connected on the second low-voltage arm resistance
R3Second end, m >=1.
6. voltage transformer according to claim 5 integrated high pressure resitstance voltage divider, it is characterised in that: further include having
Ground resistance, the first end and end third low-voltage arm resistance R of the ground resistance4Second end connection, the ground resistance
Second end ground connection.
7. the integrated high pressure resitstance voltage divider of the voltage transformer according to claim 4 or 6, it is characterised in that: described
High-voltage arm resistance R1Resistance value between 30 megaohms~80 megaohms, the resistance value of low-voltage arm resistance is between 15k Ω~25k Ω；Institute
State high-voltage arm resistance R1Resistance value ratio with low-voltage arm resistance is 3076:1 or 2659:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821986970.3U CN209342787U (en) | 2018-11-29 | 2018-11-29 | A kind of voltage transformer integrated high pressure resitstance voltage divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821986970.3U CN209342787U (en) | 2018-11-29 | 2018-11-29 | A kind of voltage transformer integrated high pressure resitstance voltage divider |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209342787U true CN209342787U (en) | 2019-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821986970.3U Active CN209342787U (en) | 2018-11-29 | 2018-11-29 | A kind of voltage transformer integrated high pressure resitstance voltage divider |
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| Country | Link |
|---|---|
| CN (1) | CN209342787U (en) |
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2018
- 2018-11-29 CN CN201821986970.3U patent/CN209342787U/en active Active
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