CN1089726A - A kind of transformer testing instrument - Google Patents
A kind of transformer testing instrument Download PDFInfo
- Publication number
- CN1089726A CN1089726A CN 93100800 CN93100800A CN1089726A CN 1089726 A CN1089726 A CN 1089726A CN 93100800 CN93100800 CN 93100800 CN 93100800 A CN93100800 A CN 93100800A CN 1089726 A CN1089726 A CN 1089726A
- Authority
- CN
- China
- Prior art keywords
- phase
- circuit
- power
- transformer
- meet
- 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.)
- Pending
Links
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention is a kind of transformer testing instrument that is used for measuring transformer wiring group and transformation ratio.The method of testing of this instrument comprises no-load voltage ratio, phase measuring circuit and single-chip microcomputer and display, former side a, b, the c end that the single-phase/three-phase power converting circuit of 220 volts of single-phase AC voltages formation balanced three-phase voltages can be located at power end and tested transformer B2.Single-phase/three-phase power converting circuit in this instrument is made up of transformer B1, phase-shift circuit and power amplification circuit.The present invention has on-the-spot easy to use, advantage such as function is many, simple in structure, compact and reasonable and cost are lower.
Description
The present invention is a kind of transformer testing instrument that is used for measuring transformer wiring group and transformation ratio.
Chinese patent 89214620 has been announced " a kind of transformation ratio auto testing instrument ", " comprise high precision VFC type A/D change-over circuit, promptly the phase sequence commutation circuit is measured the wiring change-over circuit; be the fluid drive circuit, and compositions such as the accurate quasi-peak detector and 8031 single-chip microcomputers in the design of this tester." because this tester can only be finished the automatic measurement and the demonstration of transformer voltage ratio, so the defective that function is few, range of application is narrow is arranged.
At present, a kind of improved no-load voltage ratio auto testing instrument of being produced by Wuhan special transformer factory, its principle of work is: earlier with three-phase voltage (380V three-phase voltage) through two or three transformer step-downs, isolation, be added to the former side of tested transformer then, phase measuring circuit takes out its former side, secondary square signal, deliver to that 8031 single-chip microcomputers are handled, computing, obtain tested group and phase relation.Although this tester has increased the function of " group measurement ", because this tester need be used three-phase supply, so following defective is arranged: the one, bring great inconvenience to the scene use; The 2nd, the power supply quality that is subject to three-phase supply influences, and can not guarantee the accuracy of measuring.
The objective of the invention is provides a kind of transformer testing instrument at above-mentioned defective, this tester not only can be exactly no-load voltage ratio, wiring group and the phase relation of measuring transformer automatically, and only can finish these functions with single-phase 220 volts of AC power.
The objective of the invention is to finish like this: comprise no-load voltage ratio metering circuit, phase measuring circuit and single-chip microcomputer and display, 1 single-phase/three-phase power converting circuit is located at power end and tested transformer B
2Former side between, this circuit with the three-phase voltage of 1 symmetry of 220 volts single-phase AC voltages formation, is added in B earlier then
2Former side a, b, c end, its voltage amplitude is 0.5～230
She Ji transformer testing instrument is provided with by transformer B according to the method described above
1, the single-phase/three-phase power converting circuit formed of phase-shift circuit and power amplification circuit, this circuit also can be made up of step-down rectifier stabilized voltage supply, three oscillator phases and power amplifier.
In the above-mentioned phase-shift circuit, can be by ic chip
1, resistance, adjustable resistance and electric capacity forms, its effect is with B
1The voltage U cb phase shift of output is amplified through power amplification circuit again, can obtain on, the phase place identical with the Ucb amplitude differing with Ucb 60 ° Uab.By the synthetic rule of vector as can be known voltage vector Uac equal Uab and subtract Ucb, the amplitude that is Uac is identical with the amplitude of Ucb, Uab, that is to say that Uab, Ubc, three voltage vectors of Uca constitute an equilateral triangle under higher precision, so just obtained needed three-phase testing power supply.
Above-mentioned phase measuring circuit can be made up of integrated package and corresponding resistance, for the wiring group and the phase relation of test transformer.
Advantage of the present invention is:
One because of having adopted the single-phase/three-phase power converting circuit, provide convenience so use for the scene, and its measurement accuracy improves greatly and not influenced by power supply quality.
Its two, function is many, both no-load voltage ratios of measuring transformer automatically, again can be accurately the wiring group and the phase relation of measuring transformer automatically.
Its three, simple in structure, compact and reasonable, and cost is lower.
Fig. 1 is a circuit block diagram of the present invention,
Fig. 2 is single-phase/three-phase power conversion and the phase measuring circuit schematic diagram of Fig. 1;
Fig. 3 is the another kind of single-phase/three-phase power converting circuit block scheme of Fig. 1.
The invention will be further described below in conjunction with drawings and Examples:
As shown in Figure 1, the present invention includes no-load voltage ratio, phase measuring circuit and single-chip microcomputer, display.It is without the three-phase supply civil power, and employing single-phase/three-phase power converting circuit, with single-phase (220
) civil power is transformed to required three-phase testing power supply, this circuit is located at power end and tested transformer B
2Former side a, b, c end.
As shown in Figure 2, the single-phase/three-phase power converting circuit is by transformer B
1, phase-shift circuit and power amplification circuit form.Power amplification circuit can be an integrated circuit, also can be the circuit that is made of discrete component.
In the phase-shift circuit, ic chip
1Inverting input meets divider resistance R
2, R
3Common point; IC
1In-phase output end is through capacitor C ground connection, through adjustable resistance R
1Meet R
2The other end and R
1Pair side's non-ground-end, tested transformer B
2Former side C end; IC
1Output termination R
3The other end and power amplification circuit input end.B
2Former side b end ground connection.
B shown in Fig. 2
2Former side's phase measuring circuit is by three ic chips
2, IC
3, IC
4Form with corresponding resistance.Its structure is: IC
2, IC
3, IC
4In-phase input end respectively through R
5, R
7, R
11Ground connection; Inverting input is respectively through R
6, R
9, R
13Ground connection; Output terminal then connects the input port of single-chip microcomputer respectively.IC
2In-phase input end is again through R
4, R
12Meet IC
4Inverting input, IC
4In-phase input end is through R
10, R
8Meet IC
3Anti-phase input unit.R
4And R
12Common point connect the output terminal of power amplification circuit and meet B through relay J
2Former side a end.R
8And R
10Common point meets B
1Pair side's non-ground-end and meet B through J
2Former side C end.Relay J (monolithic processor controlled switch) is also joined with the no-load voltage ratio metering circuit.The same prior art of no-load voltage ratio metering circuit.
B shown in Fig. 2
2Pair side a ', b ', c ' are by relay J and no-load voltage ratio metering circuit and by IC
5, IC
6, IC
7The circuit theory synoptic diagram that the phase measuring circuit of forming is connected.Remove B
2Pair side b ' is earth-free, is respectively through R by the J contact
14, R
15Meet IC
5Inverting input, IC
6Outside the in-phase input end, remainder is identical with former side's phase measuring circuit.
Above IC
2～IC
6Play the waveform shaping operation, sine wave is converted to the square-wave signal of representing its phase relation.
The brief description course of work of the present invention once.
One, no-load voltage ratio is measured:
When the needs measuring transformer (is B
2) no-load voltage ratio the time, the moving contact J of Single-chip Controlling switch (relay J)
1, J
2, J
3, J
4, J
5, J
6Be connected to J respectively
1", J
2", J
3", J
4", J
5", J
6" locate, i.e. B
2Former and deputy Fang Jun be communicated with the no-load voltage ratio metering circuit, so with the same no-load voltage ratio surveying work that carries out of prior art.
Two, the measurement of group and phase place
When needs are measured B
2Wiring group, exponential sum phase relation the time, the moving contact J of J then
1～J
6Be connected to J respectively
1'～J
6', promptly single-phase/three-phase power converting circuit and phase measuring circuit are in running order.Wherein, earlier by the single-phase/three-phase power converting circuit with single phase poaer supply (220
) by B
1Step-down, B
1The voltage of output adds to B on the one hand
2Former side b, c go up mutually that (b is by ground wire and B
1Link to each other), as voltage vector
Cb on the other hand by the phase-shift circuit phase shift, amplifies through power amplification circuit, obtains differing 60 °
Ab, and |
Ab|=|
So cb| is voltage vector
Ca is synthesized, and under higher precision, these three voltage vectors have constituted an equilateral triangle, have just formed a needed three-phase testing power supply, and its voltage amplitude is 0.5～230
Between.
Then, by phase measuring circuit with tested transformer B
2The input voltage signal of the output voltage signal of pair side a ', b ', c ' and former side a, b, c is changed, and the signal after the conversion is added on the single-chip microcomputer and handles, computing, can obtain B
2Wiring group, exponential sum phase relation.
Claims (6)
1, the measuring method of a kind of transformer voltage ratio and group, comprise no-load voltage ratio metering circuit, phase measuring circuit and single-chip microcomputer and display, it is characterized in that between the former side of power end and tested transformer B2, being provided with 1 single-phase/three-phase power converting circuit, this circuit is added in former side a, b, the c end of B2 then with the three-phase voltage of 1 symmetry of 220 volts of single-phase AC voltages formation.
2, measuring method according to claim 1 is characterized in that the three-phase voltage of described symmetry, and its voltage amplitude is 0.5～230
3, measuring method according to claim 1 and 2 and a kind of transformer testing instrument of designing is characterized in that the single-phase/three-phase power converting circuit, by transformer B
1, phase-shift circuit and power amplification circuit form B
1Former side's order phase power supply (220
), pair side's one end ground connection, the input end of another termination phase-shift circuit and meet B through relay J (being monolithic processor controlled switch)
2Former side c end, phase-shift circuit output termination power amplification circuit input end, power amplification circuit is exported the termination phase measuring circuit and is met B through J
2Former side A end, B
2Former side B end is through J ground connection.
4, method according to claim 1 and 2 and a kind of transformer testing instrument of designing, it is characterized in that the single-phase/three-phase power converting circuit, form step-down rectifier voltage-stabilized power supply circuit input end order phase power supply 220 by step-down rectifier voltage-stabilized power supply circuit, three oscillator phases and power amplifier
, output termination three-phase oscillator, power amplifier, power amplifier output termination B
2Former square end, the three-phase oscillator output end connects the power amplifier input end.
5, according to the described tester of claim 3, it is characterized in that in the phase-shift circuit resistance R
2, R
3Be connected to ic chip
1Inverting input, R
2Another termination B
1The non-ground-end of pair side and through adjustable resistance R
1Meet IC
1In-phase input end, IC
1In-phase input end is through capacitor C ground connection, R
3Another termination IC
1Output terminal, power amplification circuit input end.
6, tester according to claim 3 is characterized in that in the phase measuring circuit R
2Former side's phase measuring circuit is by IC
2, IC
3, IC
4Form IC
2, IC
3, IC
4In-phase input end respectively through R
5, R
7, R
11Ground connection, inverting input are respectively through R
6, R
9, R
13Ground connection, output terminal then meet the input port of single-chip microcomputer, IC respectively
2In-phase input end is through R
4, R
12Meet IC
4Inverting input, IC
3Inverting input is through R
8, R
10Meet IC
4In-phase input end, R
4And R
12Common point connect the output terminal of power amplification circuit and meet B through relay J
2Former side a end, R
8And R
10Common point meets B
1Pair side's non-ground-end and meet B through J
2Former side C end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93100800 CN1089726A (en) | 1993-01-09 | 1993-01-09 | A kind of transformer testing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93100800 CN1089726A (en) | 1993-01-09 | 1993-01-09 | A kind of transformer testing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1089726A true CN1089726A (en) | 1994-07-20 |
Family
ID=4983239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93100800 Pending CN1089726A (en) | 1993-01-09 | 1993-01-09 | A kind of transformer testing instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1089726A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1942770B (en) * | 2004-03-04 | 2011-01-12 | 哈贝尔有限公司 | Method and apparatus for characterizing a three phase transformer using a single phase power supply |
| CN102565557A (en) * | 2012-02-22 | 2012-07-11 | 明珠电气有限公司 | Method and device for testing transformation ratio of dry type transformer |
| CN103235231A (en) * | 2013-04-26 | 2013-08-07 | 广东新昇电业科技股份有限公司 | Circuit and method of bi-directionally testing phase of three-phase transformer |
| CN104880616A (en) * | 2015-05-19 | 2015-09-02 | 苏州市华安普电力工程有限公司 | Transformation ratio automatic tester |
| CN107271830A (en) * | 2017-05-25 | 2017-10-20 | 保定丰源电子科技有限公司 | A kind of no-load voltage ratio quick calculation method under special transformer non-equilibrium state |
| CN107356828A (en) * | 2017-06-16 | 2017-11-17 | 国家电网公司 | Transformer voltage ratio simulation and training device |
| CN108732430A (en) * | 2018-05-23 | 2018-11-02 | 安徽省神虹变压器股份有限公司 | A kind of twin voltage detection method of transformer cartridge type umber of turn |
-
1993
- 1993-01-09 CN CN 93100800 patent/CN1089726A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1942770B (en) * | 2004-03-04 | 2011-01-12 | 哈贝尔有限公司 | Method and apparatus for characterizing a three phase transformer using a single phase power supply |
| CN102565557A (en) * | 2012-02-22 | 2012-07-11 | 明珠电气有限公司 | Method and device for testing transformation ratio of dry type transformer |
| CN103235231A (en) * | 2013-04-26 | 2013-08-07 | 广东新昇电业科技股份有限公司 | Circuit and method of bi-directionally testing phase of three-phase transformer |
| CN103235231B (en) * | 2013-04-26 | 2015-04-22 | 广东新昇电业科技股份有限公司 | Circuit and method of bi-directionally testing phase of three-phase transformer |
| CN104880616A (en) * | 2015-05-19 | 2015-09-02 | 苏州市华安普电力工程有限公司 | Transformation ratio automatic tester |
| CN107271830A (en) * | 2017-05-25 | 2017-10-20 | 保定丰源电子科技有限公司 | A kind of no-load voltage ratio quick calculation method under special transformer non-equilibrium state |
| CN107271830B (en) * | 2017-05-25 | 2019-12-20 | 保定丰源电子科技有限公司 | Method for rapidly calculating transformation ratio of special transformer in unbalanced state |
| CN107356828A (en) * | 2017-06-16 | 2017-11-17 | 国家电网公司 | Transformer voltage ratio simulation and training device |
| CN107356828B (en) * | 2017-06-16 | 2023-10-27 | 国家电网公司 | Transformer transformation ratio simulation training device |
| CN108732430A (en) * | 2018-05-23 | 2018-11-02 | 安徽省神虹变压器股份有限公司 | A kind of twin voltage detection method of transformer cartridge type umber of turn |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6147484A (en) | Device for measuring power using switchable impedance | |
| CN101419254B (en) | Uhv transmission line parameter measuring systems and method | |
| CN102053203A (en) | Detection method and device for high-voltage power quality | |
| CN1089726A (en) | A kind of transformer testing instrument | |
| CN106992532A (en) | Hybrid three-phase power balance device and method based on capacitive coupling | |
| US4937520A (en) | Instrument to measure the errors of apparent power meters | |
| CN1808151A (en) | Three-phase electric energy metering head | |
| US6429643B1 (en) | Device for measuring power using switchable impedance | |
| JPH06245531A (en) | Frequency converter, controlling method thereof, and method for controlling motor by the frequency converter | |
| CN2152217Y (en) | Comprehensive test device for transformer performance | |
| CN109709481A (en) | DCR of Transformer and load ratio bridging switch comprehensive test device | |
| Arri et al. | Measurement of transformer power losses and efficiency in real working conditions | |
| CN103954869A (en) | Cable power frequency parameter testing device based on PXI system | |
| CN1125526C (en) | Multifunctional triphase power factor controllable current transformer | |
| CN106843020B (en) | General power load management terminal | |
| RU2115131C1 (en) | Device determining loss tangent of dielectric | |
| CN2888455Y (en) | Three-phase electrical power meter | |
| CN111289938A (en) | Current transformer error calibration equipment | |
| CN111220837A (en) | Output voltage detector of broadband PWM frequency converter | |
| CN216013495U (en) | Electricity inspection appearance with low pressure four ways primary current measurement | |
| CN86208293U (en) | Intelligent electrical load tester | |
| Domijan Jr et al. | Challenges in electrical power measurements of adjustable speed drives and motors | |
| CN105548643B (en) | Novel multi-functional electric parameter tester | |
| CN1039118A (en) | Power equipment dielectric loss and electric capacity automatic measuring instrument | |
| SU1483387A1 (en) | Method for determining active power of sine current in impedance electric circuit with |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |