CN204649852U - A kind of improved automatic Multifunctional transformation ratio test device - Google Patents
A kind of improved automatic Multifunctional transformation ratio test device Download PDFInfo
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- CN204649852U CN204649852U CN201520302970.7U CN201520302970U CN204649852U CN 204649852 U CN204649852 U CN 204649852U CN 201520302970 U CN201520302970 U CN 201520302970U CN 204649852 U CN204649852 U CN 204649852U
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Abstract
The utility model discloses a kind of improved automatic Multifunctional transformation ratio test device, belong to electric and electronic technical field, solve the problem that traditional transformer transformation ratio test device detection perform reading error is large, time-consuming and cost performance is low.Mainly comprise Power Entry Module, connection set phase sequence handover module, CPLD control module, droop amplifier, A/D converter, outside described CPLD control module, be arranged with Keysheet module, relay driving A, relay driving B and MCU microcontroller etc.The utility model Performance Detection reading is accurate, error is little, low cost of manufacture, adopts modular design, and be easy to debugging and improve, cost performance is high, and practical value is high, can be widely used in transformer voltage ratio technical field of measurement and test.
Description
Technical field
The utility model belongs to electric and electronic technical field, specifically, particularly relates to a kind of improved automatic Multifunctional transformation ratio test device.
Background technology
Measure transformation ratio object to be: (1) checks whether transformation ratio conforms to nameplate, to ensure to meet the requirements of voltage transformation; (2) voltage tap situation is checked; (3) correctness of Transformer Winding turn ratio is checked; (4), after transformer breaks down, conventional transformation ratio checks whether transformer exists turn-to-turn short circuit; (5) order of accuarcy of transformation ratio is provided, to judge that can transformer parallel running.The domestic performance test to power transformer at present is substantially still in the stage of hand dipping, every performance index are all measured by special instrument, a lot of test event still adopts some pointer instruments, there is the problem that reading error is large, time-consuming, and the repeatability measured, confidence level are also poor; Certainly along with the development of science and technology, emerge intelligent tester on the market, as Chinese patent CN201163291Y, the name of innovation and creation is called Multifunctional transformation ratio test device, and its cost is high, and inapplicable common popularization, cost performance is lower.
Summary of the invention
The utility model discloses a kind of improved automatic Multifunctional transformation ratio test device, for solving the problem that traditional transformer transformation ratio test device detection perform reading error is large, time-consuming and cost performance is low.
The utility model is achieved through the following technical solutions:
A kind of improved automatic Multifunctional transformation ratio test device, comprise Power Entry Module, connection set phase sequence handover module, CPLD control module, described Power Entry Module is connected with connection set phase sequence handover module wire, described connection set phase sequence handover module input end is connected with tested transformer wire, described connection set phase sequence handover module output terminal is connected with droop amplifier electric signal, and described droop amplifier is connected with A/D converter through amplifying follower A; Described Power Entry Module is also connected with A/D converter electric signal by divider resistance module, current transformer module and amplification follower B; Keysheet module, relay driving A, relay driving B and MCU microcontroller is arranged with outside described CPLD control module, described CPLD control module switches electric signal by relay driving A with connecting group grade phase sequence and is connected, described CPLD control module is connected with the two-way electric signal of MCU microcontroller, described MCU microcontroller is connected with PC host computer electric signal through serial communication module, and described MCU microcontroller is also connected with LCD display electric signal; Described A/D converter is connected with MCU microcontroller.
Described Power Entry Module input voltage is alternating voltage 220V.
The control chip model that described CPLD control module adopts is EPM7128ELC84.
The model of described MCU microcontroller is P80C51BH.
Described A/D converter model is max194A/D converter.
Compared with prior art, the beneficial effects of the utility model are:
1. the utility model adopts Programmable logical controller chip CPLD, and Performance Detection reading is accurate on the one hand, error is little, simplifies circuit design on the other hand, reduces manufacturing cost;
2. the utility model considers data sampling and processing, simplify circuit design, have employed max194A/D converter, the two paths of signals (former limit, secondary voltage signal) that will measure passes to A/D converter simultaneously, although two paths of signals in testing all time be engraved in change, but because transformation ratio is a ratio, so do not affect test result;
3. the utility model adopts modular design, and be easy to debugging and improve, cost performance is high, and practical value is high, can be widely used in transformer voltage ratio technical field of measurement and test.
Accompanying drawing explanation
Accompanying drawing is the utility model Circuits System block diagram.
In figure: 1. Power Entry Module; 2. connection set phase sequence handover module; 3.CPLD control module; 4. tested transformer; 5. droop amplifier; 6. amplify follower A; 7.A/D converter; 8. divider resistance module; 9. current transformer module; 10. amplify follower B; 11.LCD display screen; 12. Keysheet modules; 13. relays drive A; 14. relays drive B; 15.MCU microcontroller; 16. serial communication modules; 17.PC host computer.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated:
A kind of improved automatic Multifunctional transformation ratio test device, comprise Power Entry Module 1, connection set phase sequence handover module 2, CPLD control module 3, described Power Entry Module 1 is connected with connection set phase sequence handover module 2 wire, described connection set phase sequence handover module 2 input end is connected with tested transformer 4 wire, described connection set phase sequence handover module 2 output terminal is connected with droop amplifier 5 electric signal, and described droop amplifier 5 is connected with A/D converter 7 through amplifying follower A6; Described Power Entry Module 1 is also connected with A/D converter 7 electric signal by divider resistance module 8, current transformer module 9 and amplification follower B10; Keysheet module 12, relay driving A13, relay driving B14 and MCU microcontroller 15 is arranged with outside described CPLD control module 3, described CPLD control module 3 switches 2 electric signal by relay driving A13 with connecting group grade phase sequence and is connected, described CPLD control module 3 is connected with the two-way electric signal of MCU microcontroller 15, described MCU microcontroller 15 is connected with PC host computer 17 electric signal through serial communication module 16, and described MCU microcontroller 15 is also connected with LCD display 11 electric signal; Described A/D converter 7 is connected with MCU microcontroller 15.
Described Power Entry Module 1 input voltage is alternating voltage 220V.
The control chip model that described CPLD control module 3 adopts is EPM7128ELC84.
The model of described MCU microcontroller 15 is P80C51BH.
Described A/D converter 7 model is max194A/D converter.
Adopt voltmeter method, when rated voltage ratio is little (KN < 5), from low pressure winding excitation, directly can measure low pressure and high tension voltage with voltage table simultaneously.When high voltage induction voltage compare high (KN > 5) directly can not be measured with voltage table, adopt from high-pressure side excitation, coordinate voltage table to measure high pressure with mutual inductor, and induced voltage measured by low pressure direct electricity consumption pressure table.Measuring transformer transformation ratio, at the voltage of tested transformer primary side input 220V, and gathers secondary output voltage, after former limit and secondary voltage amount are all converted into digital quantity, can calculate the transformation ratio of transformer to be measured.The utility model selects by instrument internal three-phase voltage source, high-pressure side test voltage the signal conditioning circuit that CPLD control module 3, low voltage experiment voltage select CPLD control module 3, droop amplifier 5, circuit such as amplification follower A6 and A/D converter 7 etc. forms.Connection set phase sequence handover module 2, this module mainly completes connection set and phase sequence and selects, and controls the corresponding actuating of relay, the measurement of the accurate transformation ratio realized under corresponding connected mode.
In sum, be only preferred embodiment of the present utility model, not be used for limit the utility model implement scope, all equalizations of doing according to shape, structure, feature and the spirit described in the utility model right change and modify, and all should be included in right of the present utility model.
Claims (5)
1. an improved automatic Multifunctional transformation ratio test device, it is characterized in that: comprise Power Entry Module (1), connection set phase sequence handover module (2), CPLD control module (3), described Power Entry Module (1) is connected with connection set phase sequence handover module (2) wire, described connection set phase sequence handover module (2) input end is connected with tested transformer (4) wire, described connection set phase sequence handover module (2) output terminal is connected with droop amplifier (5) electric signal, described droop amplifier (5) is connected with A/D converter (7) through amplifying follower A (6), described Power Entry Module (1) is also connected with A/D converter (7) electric signal by divider resistance module (8), current transformer module (9) and amplification follower B (10), Keysheet module (12) is arranged with outside described CPLD control module (3), relay drives A (13), relay drives B (14) and MCU microcontroller (15), described CPLD control module (3) drives A (13) to switch (2) electric signal with connecting group grade phase sequence by relay to be connected, described CPLD control module (3) is connected with MCU microcontroller (15) two-way electric signal, described MCU microcontroller (15) is connected with PC host computer (17) electric signal through serial communication module (16), described MCU microcontroller (15) is also connected with LCD display (11) electric signal, described A/D converter (7) is connected with MCU microcontroller (15).
2. a kind of improved automatic Multifunctional transformation ratio test device according to claim 1, is characterized in that: described Power Entry Module (1) input voltage is alternating voltage 220V.
3. a kind of improved automatic Multifunctional transformation ratio test device according to claim 1, is characterized in that: the control chip model that described CPLD control module (3) adopts is EPM7128ELC84.
4. a kind of improved automatic Multifunctional transformation ratio test device according to claim 1, is characterized in that: the model of described MCU microcontroller (15) is P80C51BH.
5. a kind of improved automatic Multifunctional transformation ratio test device according to claim 1, is characterized in that: described A/D converter (7) model is max194A/D converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520302970.7U CN204649852U (en) | 2015-05-09 | 2015-05-09 | A kind of improved automatic Multifunctional transformation ratio test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520302970.7U CN204649852U (en) | 2015-05-09 | 2015-05-09 | A kind of improved automatic Multifunctional transformation ratio test device |
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| Publication Number | Publication Date |
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| CN204649852U true CN204649852U (en) | 2015-09-16 |
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| CN201520302970.7U Expired - Fee Related CN204649852U (en) | 2015-05-09 | 2015-05-09 | A kind of improved automatic Multifunctional transformation ratio test device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124875A (en) * | 2016-06-13 | 2016-11-16 | 国家电网公司 | A kind of separate switching circuit measured for transformer voltage ratio |
| CN107356828A (en) * | 2017-06-16 | 2017-11-17 | 国家电网公司 | Transformer voltage ratio simulation and training device |
| CN109669081A (en) * | 2018-12-14 | 2019-04-23 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of method for real-time monitoring of sine and cosine resolver voltage change ratio |
-
2015
- 2015-05-09 CN CN201520302970.7U patent/CN204649852U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124875A (en) * | 2016-06-13 | 2016-11-16 | 国家电网公司 | A kind of separate switching circuit measured for transformer voltage ratio |
| 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 |
| CN109669081A (en) * | 2018-12-14 | 2019-04-23 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of method for real-time monitoring of sine and cosine resolver voltage change ratio |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 Termination date: 20210509 |
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| CF01 | Termination of patent right due to non-payment of annual fee |