CN200989938Y - Electric power type all automatic mutual inductor correcting device - Google Patents
Electric power type all automatic mutual inductor correcting device Download PDFInfo
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- CN200989938Y CN200989938Y CN 200620131149 CN200620131149U CN200989938Y CN 200989938 Y CN200989938 Y CN 200989938Y CN 200620131149 CN200620131149 CN 200620131149 CN 200620131149 U CN200620131149 U CN 200620131149U CN 200989938 Y CN200989938 Y CN 200989938Y
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Abstract
The utility model discloses a power supply type full automatic mutual inductor verifying unit comprising a device controller, a voltage current loading box, a mutual inductor verifying device; wherein, the device controller is connected with an electron source which is composed of a signal generator, a power amplifier and a switch power supply. The utility model detailedly solves the instability of a power output, distortion of power output waveform and troublesome regulation of 1.0 percent of points in a CT measurement.
Description
Technical field
The utility model relates to a kind of electric power mutual inductance calibration equipment, specifically, relates to a kind of power supply formula automatic instrument transformer calibrator.
Background technology
Traditional electrician's formula transducer check device generally is by Setup Controller; voltage, current loading case, mutual-inductor tester, input power supply, overcurrent protection, thick smart motor, thick accurate adjustment depressor are formed, and are connected the verification of realization to mutual inductor with (as up-flow/boost, tested CT/PT) and the microsystem (microcomputer, machine seal machine) of external unit respectively.Wherein " overcurrent protection, thick accurate adjustment depressor, thick smart motor, input power supply " is electrician source part.Its Setup Controller is passed to thick smart motor with the rise and fall signal, makes it when positive and negative rotation, drives thick accurate adjustment depressor and carries out pressure regulation.In current lifting device (or stepup transformer) part of the output pay standard of thick accurate adjustment depressor, thereby produce primary current (or voltage).When primary current (or voltage) flow through standard mutual inductor CT and tested mutual inductor CT simultaneously, their secondary coil induced secondary current (or secondary voltage).The electric current of standard (or voltage) turns back to mutual-inductor tester.
The electric current (or voltage) of tested mutual inductor CT (or PT) turns back to tester by load box.Verification is carried out the analysis of number percent and ratio angular difference to standard and tested binomial electric current (or secondary voltage), and the result that will analyze passes to Setup Controller again, again its number percent is carried out correct pressure regulation and sends instructions control electrode.When finding rules point, will there be error to pass to microcomputer.
Setup Controller drives thick smart motor, drives thick accurate adjustment depressor, by Single Chip Microcomputer (SCM) system control motor-driven pressure regulator, and the output voltage of manual or semi-automatic, full-automatic regulation pressure regulator.The driven by motor pressure regulator is rotated, the size and Orientation of pressing input command is regulated the output of pressure regulator, voltage, current detection circuit feed back to Single Chip Microcomputer (SCM) system in real time with the output voltage of pressure regulator, compare with the output valve that requires, by constantly according to the size adjustment of error amount control to motor, up to the output valve of pressure regulator within the acceptable range, stop control again, motor is stopped operating motor.Therefore, there is following defective in actual use:
1, because the input power supply of electrician source part is a civil power because the spread of voltage that civil power has only is 0.5%, the voltage fluctuation that causes device output to produce easily, cause the percentage point moment of surveying inaccurate.
2, also because civil power degree of distortion height is 3%, and spike and harmonic interference is arranged that output enters into check system through pressure regulator, causes the inaccurate of check results.
3, non-adjustable because of the adjusting fineness of pressure regulator.The driving element of pressure regulator is motor, thick, smart, the thin twin-channel design of motor, improved the pressure regulator output resolution ratio so to a certain extent, but the adjusting fineness of pressure regulator is non-adjustable, is the stepping of machinery, and total number of steps was 3000 steps.So at 1% point, pressure regulator is looked for a difficulty.
The utility model content
The purpose of this utility model is for addressing the above problem, and a kind of power supply formula automatic instrument transformer calibrator is provided.
Technical solution of the present utility model is finished like this: a kind of power supply formula automatic instrument transformer calibrator, comprise Setup Controller, voltage, current loading case, mutual-inductor tester, wherein it also has by signal generator, the electron source that Switching Power Supply and power amplifier are formed.
In this was novel, described signal generator was one and is connected to form by integrated circuit and D/A converter.
In this is novel, described Switching Power Supply, the capacitor C 1, the C2 that comprise and connect, its positive pole is connected to the collector of dc supply input and triode T1-T2, minus earth; The base stage of triode T1-T4 connects the output terminal of integrated circuit (IC) 1, and the emitter of triode T1 connects the collector of triode T3 and the primary winding of switch transformer TE respectively; The emitter of triode T2 connect respectively the collector of triode T4 and switch transformer TE primary winding, the grounded emitter of triode T3, T4; An output terminal of switch transformer TE secondary coil is connected to inductance L by diode D1, the center tap of switch transformer TE and diode D1 negative pole end also meet a diode D2 and are connected to the inductance L input end, and inductance L output terminal and switch transformer TE center tap also meet capacitor C 3, C4; The output terminal of inductance L is connected to integrated circuit (IC) 1 feedback input end by resistance R 16, and the stepup transformer signal connects integrated circuit (IC) 1 input end, meets a stake resistance R15 between integrated circuit (IC) 1 and the resistance R 16.
In this is novel, the circuit of described power amplifier comprises: input signal is connected to 6 pin of transport and placing device N1B by resistance R 1, the 5 pin ground connection of transport and placing device N1B, 7 pin of transport and placing device N1B output are connected to 6 pin of transport and placing device N1B by resistance R 3, and 7 pin of transport and placing device N1B are leaded up to resistance R 4 and are connected to 6 pin of a transport and placing device N2B; Another road is connected to 5 pin of transport and placing device N5B; The 5 pin ground connection of transport and placing device N2B, 7 pin one tunnel of transport and placing device N2B connect 5 pin of transport and placing device N3B; The resistance R 5 of leading up to connects 6 pin of transport and placing device N2B, and 7 pin of transport and placing device N3B are connected to field effect transistor TN by the R9 of resistance
0Grid, field effect transistor TN
0Drain electrode connect the primary winding of electromagnet TD, field effect transistor TN
0Drain electrode one end lead up to resistance R 10 ground connection, another road connects 5 pin of transport and placing device N4B by resistance R 8,6 pin of transport and placing device N4B are by resistance R 7 ground connection; 7 pin of transport and placing device N4B are connected to 6 pin of transport and placing device N3B, 7,6 pin and the connecting resistance R6 of transport and placing device N4B, and 7 pin of transport and placing device N5B are connected to field effect transistor TN by resistance R 11
1Grid, field effect transistor TN
1Drain electrode be connected to the primary winding of electromagnet TD, field effect transistor TN
1Drain electrode by resistance R 15 ground connection, field effect transistor TN
1Another road connect 5 pin of transport and placing device N6B by resistance R 14,6 pin of transport and placing device N6B are by resistance R 13 ground connection; 7 pin of transport and placing device N6B are connected to 6 pin of transport and placing device N5B, and 7,6 pin of transport and placing device N6B also connect a resistance R 12; The secondary coil of electromagnet TD meets power supply output TDA respectively, and Switching Power Supply feedback output TDB and TDC positive pole feed back to input 6 pin of transport and placing device N1B by resistance R 2.
Power supply formula automatic instrument transformer calibrator of the present utility model has good effect to be:
1, improved the degree of stability of power supply output.Amplifier power supply has adopted the Multi-Layer Feedback circuit, makes output stability 0.1%, and the standard feedback signal has adopted digital, has solved the anti-problem of polarity.Signal frequency adopts follows the civil power mode of frequency regulation, guarantees frequency stabilization and is not subjected to beat frequency to disturb the fluctuation of caused voltage output.
2, solved power supply output waveform degree of distortion.At first, drive signal has adopted the analog digital composite signal; Secondly, adopted high-power design of following Switching Power Supply and voltage-type power amplifier.
3, solved 10% bad adjustment problem.Why tradition electrician source apparatus exists the problem of 1.0% bad adjustment in the CT measurement, and its basic reason is by the pressure regulator output voltage, because automatic coupling voltage regulator output is not isolated and the unrestricted shortcoming of power output (being electric current output).And the quality of the mechanical index of pressure regulator also directly has influence on the solution of this key issue.Therefore therefore, it is insurmountable selecting pressure regulator for use in should tradition.
4, this novel degree of stability is 0.2%, degree of distortion is 3 ‰ (high-precision sine waves), fineness 0.1 ‰; Effectively utilized the voltage waveform tracking technique of Switching Power Supply, followed the tracks of output waveform, efficient is improved.
Description of drawings
Fig. 1 is this novel structured flowchart.
Fig. 2 is the block diagram of Fig. 1 signal generator.
Fig. 3 is the circuit theory diagrams of Fig. 1 Switching Power Supply.
Fig. 4 is the circuit theory diagrams of Fig. 1 power amplifier.
Embodiment
Below in conjunction with accompanying drawing embodiment to this novel being described in further detail.Should understand the accompanying drawing of giving only for reference this is novel with explanation, and be not used in this novel protection domain of restriction.
Comprised by power supply formula automatic instrument transformer calibrator shown in Figure 1: Setup Controller, voltage, current loading case, mutual-inductor tester, signal generator, Switching Power Supply and power amplifier are formed.The electron source part of being made up of signal generator, Switching Power Supply and power amplifier wherein, this is the key component that is different from traditional calibration equipment.By rectified three-phase circuit three-phase alternating current is rectified into the voltage input of direct current as Switching Power Supply.The three-phase power amplifier amplifies output adjustable current or voltage with the sinusoidal signal of three-phase signal generator.By changing the signal frequency of signal generator, can realize frequency conversion output.During output current, the two-phase power amplifier is sent into same signal, promotes stepup transformer after effect is amplified separately, and common series connection output makes three-phase power amplifier automatic current equalizing.
Fig. 2 has provided the block diagram of signal generator, and this signal generator is connected to a single-chip microcomputer, and one is terminated at the high-power signal input end, and its output termination D/A converter is output as the 5V sine wave.
Fig. 3 has provided the circuit theory diagrams of Switching Power Supply.The capacitor C that comprises and connect
1, C
2, its positive terminal is connected to the input end of direct supply, and triode T
1, T
2Collector, negative pole end ground connection; Triode T
1-T
4Base stage connect the output terminal of integrated circuit (IC) 1, the emitter of triode T1 is connected to triode T respectively
3Collector and the primary winding of switch transformer TE; Controllable silicon T
2Emitter be connected to triode T respectively
4Collector and the primary winding of switch transformer TE, triode T
3, T
4Grounded emitter; An output terminal of switch transformer TE secondary coil is by diode D
1Be connected to inductance L, another output terminal of switch transformer TE secondary is by diode D
3Be connected to center tap and the diode D of inductance L switch transformer TE
1Negative pole end also meets a diode D
2Be connected to the inductance L input end, inductance L output terminal and switch transformer TE center tap also connect capacitor C
3C
4The output terminal of inductance L passes through resistance R
16Be connected to the feedback input end of integrated circuit (IC) 1, its boost signal input connects the input end of integrated circuit (IC) 1, integrated circuit (IC) 1 and resistance R
16Between meet the R of a stake resistance
15
When the direct supply after the rectified three-phase circuit rectification through capacitor C
1C
2Behind the voltage regulation filtering, by triode T
1-T
4Be chopped into high-frequency signal, the frequency of signal and conducting are by integrated circuit (IC)
1Control.High-frequency signal is sent into the side of switch transformer TE, and the secondary of TE is surveyed electric current through diode D
1-D
3After the rectification, send into by inductance L, capacitor C
3C
4The filtering circuit of forming forms the required power supply VT of power amplifier, resistance R
15, R
16Form feedback circuit and send into feedback and the TOB signal of integrated circuit (IC) 1 as output voltage, VEF common modulation pwm signal makes power supply VT export automatic tracking power amplifier output voltage.
Fig. 4 has provided the circuit theory diagrams of power amplifier.Comprise that input signal passes through resistance R
1Connect 6 pin of transport and placing device N1B, the 5 pin ground connection of transport and placing device N1B, 7 pin of transport and placing device N1B output are connected to 6 pin of transport and placing device N1B by resistance R 3, and 7 pin of transport and placing device N1B are leaded up to resistance R
4Be connected to 6 pin of transport and placing device N2B; Another road is connected to 5 pin of transport and placing device N5B; The 5 pin ground connection of transport and placing device N2B, 7 pin one tunnel of transport and placing device N2B connect 5 pin of transport and placing device N3B; Lead up to resistance R
5Connect 6 pin of transport and placing device N2B; 7 pin of transport and placing device N3B pass through resistance R
9Be connected to field effect transistor TN
0Grid, field effect transistor TN
0Drain electrode connect the primary winding of stepup transformer electromagnet TD, TN
0Drain electrode one end lead up to resistance R
10Ground connection; Resistance R is passed through on another road
8Be connected to 5 pin of transport and placing device N4B; 6 pin of transport and placing device N4B pass through resistance R
7Ground connection; 7 pin of transport and placing device N4B are connected to 6 pin of transport and placing device N3B, and 7,6 pin of transport and placing device N4B are connected to resistance R
6, 7 pin of transport and placing device N5B are by the R of resistance
11Be connected to field effect transistor TN
1Grid, field effect transistor TN
1Drain electrode be connected to the primary winding of stepup transformer electromagnet TD, field effect transistor TN
1The R of drain electrode by resistance
15Ground connection, field effect transistor TN
1The R of another road by resistance
14Connect 5 pin of transport and placing device N6B, 6 pin of transport and placing device N6B pass through resistance R
13Ground connection; 7 pin of transport and placing device N6B are connected to 6 pin of transport and placing device N5B, and 7,6 pin of transport and placing device N6B are connected to resistance R
12The secondary coil of stepup transformer electromagnet TD is connected to power supply output TDA respectively, and Switching Power Supply feedback output TDB and TDC positive pole pass through resistance R
2Feed back to the input pin of transport and placing device N1B.
When input exchange signal and stepup transformer feedback signal via transport and placing device N1BR
1-R
3After the proportional amplifier circuit of forming amplified, the one tunnel through transport and placing device N2BR
4R
5The driver that the oppositely contrary transport and placing device N3BR7 of going into of the reverser of forming forms drives TN
0Another road is directly by transport and placing device N5BR
11Drive field effect transistor TN
1, push off amplification, make TD level of stepup transformer magnet coil that power supply output be arranged.Transport and placing device N4BR
6-R
8Form field effect transistor TN
0Feedback circuit, transport and placing device N6BR
12-R
14Constitute field effect transistor TN
1Feedback circuit, the common three groups of windings output of stepup transformer electromagnet TD is respectively power supply output TDA, the perpendicular thick TDC of Switching Power Supply feedback output TDB and feedback signal, wherein TDB is as the signal input of signal generator.Switching Power Supply is gathered stepup transformer TD voltage signal size, and makes the output of Switching Power Supply output tracking signal make field effect transistor TN
0With field effect transistor TN
1Keep in the 10V with tube voltage drop, with raise the efficiency, Comparative Examples amplifies.
Electron source in above-mentioned is to be connected with the threephase switch power supply respectively after adopting three phase rectifier, this three-phase supply is connected with the three-phase power amplifier respectively and is connected to magnet coil respectively, Setup Controller one tunnel is connected to the threephase switch power supply, another road is connected to signal generator, is connected to the three-phase power amplifier respectively by signal generator.
The automatic transducer check device of power supply formula in above-mentioned is connected use with external unit, microsystem respectively.
Claims (4)
1, power supply formula automatic instrument transformer calibrator comprises Setup Controller, voltage, current loading case, mutual-inductor tester, it is characterized in that it also has by signal generator, the electron source that Switching Power Supply and power amplifier are formed.
2,, it is characterized in that described signal generator is one and is connected to form by integrated circuit and D/A converter by the described power supply formula of claim 1 automatic instrument transformer calibrator.
3, by the described power supply formula of claim 1 automatic instrument transformer calibrator, it is characterized in that described switching power circuit comprises: and the capacitor C 1, the C2 that connect, its positive pole is connected to the collector of dc supply input and triode T1-T2, minus earth; The base stage of triode T1-T4 connects the output terminal of integrated circuit (IC) 1, and the emitter of triode T1 connects the collector of triode T3 and the primary winding of switch transformer TE respectively; The emitter of triode T2 connect respectively the collector of triode T4 and switch transformer TE primary winding, the grounded emitter of triode T3, T4; An output terminal of switch transformer TE secondary coil is connected to inductance L by diode D1, the center tap of switch transformer TE and diode D1 negative pole end also meet a diode D2 and are connected to the inductance L input end, and inductance L output terminal and switch transformer TE center tap also meet capacitor C 3, C4; The output terminal of inductance L is connected to integrated circuit (IC) 1 feedback input end by resistance R 16, and the stepup transformer signal connects integrated circuit (IC) 1 input end, meets a stake resistance R15 between integrated circuit (IC) 1 and the resistance R 16.
4, by the described power supply formula of claim 1 automatic instrument transformer calibrator, the circuit that it is characterized in that described power amplifier comprises: input signal is connected to 6 pin of transport and placing device N1B by resistance R 1, the 5 pin ground connection of transport and placing device N1B, 7 pin of transport and placing device N1B output are connected to 6 pin of transport and placing device N1B by resistance R 3, and 7 pin of transport and placing device N1B are leaded up to resistance R 4 and are connected to 6 pin of a transport and placing device N2B; Another road is connected to 5 pin of transport and placing device N5B; The 5 pin ground connection of transport and placing device N2B, 7 pin one tunnel of transport and placing device N2B connect 5 pin of transport and placing device N3B; The resistance R 5 of leading up to connects 6 pin of transport and placing device N2B, and 7 pin of transport and placing device N3B are connected to field effect transistor TN by the R9 of resistance
0Grid, field effect transistor TN
0Drain electrode connect the primary winding of electromagnet TD, field effect transistor TN
0Drain electrode one end lead up to resistance R 10 ground connection, another road connects 5 pin of transport and placing device N4B by resistance R 8,6 pin of transport and placing device N4B are by resistance R 7 ground connection; 7 pin of transport and placing device N4B are connected to 6 pin of transport and placing device N3B, 7,6 pin and the connecting resistance R6 of transport and placing device N4B, and 7 pin of transport and placing device N5B are connected to field effect transistor TN by resistance R 11
1Grid, field effect transistor TN
1Drain electrode be connected to the primary winding of electromagnet TD, field effect transistor TN
1Drain electrode by resistance R 15 ground connection, hand over and should manage TN
1Another road connect 5 pin of transport and placing device N6B by resistance R 14,6 pin of transport and placing device N6B are by resistance R 13 ground connection; 7 pin of transport and placing device N6B are connected to 6 pin of transport and placing device N5B, and 7,6 pin of transport and placing device N6B also connect a resistance R 12; The secondary coil of electromagnet TD meets power supply output TDA respectively, and Switching Power Supply feedback output TDB and TDC positive pole feed back to input 6 pin of transport and placing device N1B by resistance R 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620131149 CN200989938Y (en) | 2006-04-29 | 2006-08-29 | Electric power type all automatic mutual inductor correcting device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200620024273 | 2006-04-29 | ||
| CN200620024273.0 | 2006-04-29 | ||
| CN 200620131149 CN200989938Y (en) | 2006-04-29 | 2006-08-29 | Electric power type all automatic mutual inductor correcting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200989938Y true CN200989938Y (en) | 2007-12-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620131149 Expired - Lifetime CN200989938Y (en) | 2006-04-29 | 2006-08-29 | Electric power type all automatic mutual inductor correcting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200989938Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941216A (en) * | 2014-05-19 | 2014-07-23 | 李峰 | Automatic voltage transformer on-site inspection tester |
| CN104459589A (en) * | 2013-09-17 | 2015-03-25 | 比亚迪股份有限公司 | Automatic test system of current sensor |
| CN105022017A (en) * | 2015-07-22 | 2015-11-04 | 国家电网公司 | Portable CT circuit flow test instrument |
| CN107450042A (en) * | 2017-09-21 | 2017-12-08 | 国家电网公司 | A kind of current transformer detecting system |
-
2006
- 2006-08-29 CN CN 200620131149 patent/CN200989938Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459589A (en) * | 2013-09-17 | 2015-03-25 | 比亚迪股份有限公司 | Automatic test system of current sensor |
| CN103941216A (en) * | 2014-05-19 | 2014-07-23 | 李峰 | Automatic voltage transformer on-site inspection tester |
| CN105022017A (en) * | 2015-07-22 | 2015-11-04 | 国家电网公司 | Portable CT circuit flow test instrument |
| CN105022017B (en) * | 2015-07-22 | 2018-02-02 | 国家电网公司 | A kind of portable CT current injection of circuits tester |
| CN107450042A (en) * | 2017-09-21 | 2017-12-08 | 国家电网公司 | A kind of current transformer detecting system |
| CN107450042B (en) * | 2017-09-21 | 2023-07-04 | 国家电网公司 | Current transformer detecting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: He Xuesong Inventor after: Yang Baolin Inventor after: Liu Zhongxiao Inventor after: Jiang Hui Inventor after: Zhang Guoqing Inventor before: He Xuesong Inventor before: Jiang Hui Inventor before: Liu Zhongxiao |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: HE XUESONG; JIANG HUI; LIU ZHONGXIAO TO: HE XUESONG; YANG BAOLIN; LIU ZHONGXIAO; JIANG HUI; ZHANG GUOQING |
|
| C56 | Change in the name or address of the patentee |
Owner name: HAINA POWER MEASUREMENT + INSTRUMENTS INC. Free format text: FORMER NAME: QINHUANGDAO HAINA ELECTRICAL MEASUREMENT INC. |
|
| CP03 | Change of name, title or address |
Address after: 066004 Jing River Road, Qinhuangdao Economic Development Zone, Hebei, 5 Patentee after: Haina Power Measurement & Instruments Inc. Address before: 066004 Taihang Mountain Road No. 23, Qinhuangdao Development Zone, Hebei province (Haina electric measuring instrument Co., Ltd.) Patentee before: Qinhuangdao Haina Electrical Measurement Inc. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20071212 |
|
| EXPY | Termination of patent right or utility model |