CN204945784U - Transformer Winding temperature controller temperature rise experimental provision - Google Patents
Transformer Winding temperature controller temperature rise experimental provision Download PDFInfo
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- CN204945784U CN204945784U CN201520581800.7U CN201520581800U CN204945784U CN 204945784 U CN204945784 U CN 204945784U CN 201520581800 U CN201520581800 U CN 201520581800U CN 204945784 U CN204945784 U CN 204945784U
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Abstract
The utility model disclose a kind of simple to operate, labour intensity is low, save the energy, can realize the Transformer Winding temperature controller temperature rise experimental provision of constant current output, have computing machine, computing machine connects with single-chip microcomputer; Alternating current 220V is connected with single-chip microcomputer by rectification circuit; The output of single-chip microcomputer connects with IGBT respectively by current control circuit and voltage control circuit, and IGBT connects with inverter circuit, and inverter circuit is leaded up to current feedback circuit and connected with single-chip microcomputer, and another road connects with output terminal.
Description
Technical field
The utility model relates to a kind of experimental provision for Transformer Winding temperature controller, especially a kind of simple to operate, labour intensity is low, save the energy, can realize the Transformer Winding temperature controller temperature rise experimental provision of constant current output.
Background technology
At present, Transformer Winding temperature controller is equipped with the current transformer connected with transformer current mutual inductor, and current transformer exports and connects with heating (resistance wire), and heating is placed in the copper body of inner chamber, has catch bar in the front end of copper body.When Transformer Winding temperature variation, the electric current that current transformer exports flows through the heating in copper body, and the heating-up temperature of heating makes the volumetric expansion of temperature sensing medium, and push pointer is rotated, and indicates tested winding temperature.When verifying Transformer Winding temperature controller, need to adopt temperature rise experimental provision.Existing temperature rise experimental provision adopts 2kVA250V pressure regulator to connect 1kW load (bulb, well heater etc.), exports the electric current of 0.5A ~ 5A, namely simulates the current transformer connected with transformer current mutual inductor winding and output signal.Connected with Transformer Winding temperature controller heating by exported electric current, realize simulation temperature rise, there are the following problems:
(1) necessary manual adjustments pressure regulator, and carry out monitoring current size by reometer A, because load resistance can fluctuate along with the voltage of pressure regulator output, output current then fluctuates thereupon, need constantly regulate and monitor all the time, just can carry out effective temperature rise experiment, complicated operation, labour intensity are high;
(2) 1kW bearing power is comparatively large, is converted into heat exhaustion merely, causes the waste of the energy.
Summary of the invention
The utility model is the above-mentioned technical matters in order to solve existing for prior art, provide a kind of simple to operate, labour intensity is low, save the energy, can realize the Transformer Winding temperature controller temperature rise experimental provision of constant current output.
Technical solution of the present utility model is: a kind of Transformer Winding temperature controller temperature rise experimental provision, and it is characterized in that: have computing machine, computing machine connects with single-chip microcomputer; Alternating current 220V is connected with single-chip microcomputer by rectification circuit; The output of single-chip microcomputer connects with IGBT respectively by current control circuit and voltage control circuit, and IGBT connects with inverter circuit, and inverter circuit is leaded up to current feedback circuit and connected with single-chip microcomputer, and another road connects with output terminal.
The parameters such as test figure are delivered to single-chip microcomputer by computing machine by the utility model, by Single-chip Controlling IGBT output current, and by the change of current feedback circuit Real-Time Monitoring output current, simple to operate and can realize constant current output; Because of without the need to high power load, save the energy; Do not need experimenter's monitored over time, reduce labour intensity.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described.As shown in Figure 1: have computing machine, computing machine connects with single-chip microcomputer; AC220V is connected with single-chip microcomputer by rectification circuit; The output of single-chip microcomputer is respectively by current control circuit and voltage control circuit and IGBT(IRFP460) connect, IGBT connects with inverter circuit, and inverter circuit is leaded up to current feedback circuit and connected with single-chip microcomputer, and another road connects with output terminal.Current control circuit and voltage control circuit adopt existing IGBT electric current, voltage control circuit.Current feedback circuit comprises rectification circuit, analog to digital conversion etc., converts by analog current signal the digital signal that single-chip microcomputer can receive to.
Principle of work:
During temperature rise experiment, output terminal is connected with Transformer Winding temperature controller heating.
The parameter such as current value and test period needed for test is set in computing machine, by 485 communication interfaces, parameter is sent in single-chip microcomputer; AC220V by rectification circuit for single-chip microcomputer provides working power; Single-chip microcomputer output signal, by current control circuit, voltage control circuit controls IGBT, is made the DC current of IGBT export from 0 slowly rising until setting, then becomes AC signal by inverter circuit and exported by output terminal.Whether single-chip microcomputer detects actual output current close to setting value by set current feedback circuit, has deviation then auto modification, thus realizes constant current output.
Claims (1)
1. a Transformer Winding temperature controller temperature rise experimental provision, it is characterized in that: have computing machine, computing machine connects with single-chip microcomputer; Alternating current 220V is connected with single-chip microcomputer by rectification circuit; The output of single-chip microcomputer connects with IGBT respectively by current control circuit and voltage control circuit, and IGBT connects with inverter circuit, and inverter circuit is leaded up to current feedback circuit and connected with single-chip microcomputer, and another road connects with output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520581800.7U CN204945784U (en) | 2015-08-05 | 2015-08-05 | Transformer Winding temperature controller temperature rise experimental provision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520581800.7U CN204945784U (en) | 2015-08-05 | 2015-08-05 | Transformer Winding temperature controller temperature rise experimental provision |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204945784U true CN204945784U (en) | 2016-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201520581800.7U Active CN204945784U (en) | 2015-08-05 | 2015-08-05 | Transformer Winding temperature controller temperature rise experimental provision |
Country Status (1)
| Country | Link |
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| CN (1) | CN204945784U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505521A (en) * | 2017-08-10 | 2017-12-22 | 中国科学院上海高等研究院 | The passive and wireless temperature rise sensor and detection method for temperature rise of a kind of power distribution network transformer |
-
2015
- 2015-08-05 CN CN201520581800.7U patent/CN204945784U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505521A (en) * | 2017-08-10 | 2017-12-22 | 中国科学院上海高等研究院 | The passive and wireless temperature rise sensor and detection method for temperature rise of a kind of power distribution network transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |