CN103701332A - Intelligent power transformer on basis of PWM (Pulse Width Modulation) - Google Patents
Intelligent power transformer on basis of PWM (Pulse Width Modulation) Download PDFInfo
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- CN103701332A CN103701332A CN201310715978.1A CN201310715978A CN103701332A CN 103701332 A CN103701332 A CN 103701332A CN 201310715978 A CN201310715978 A CN 201310715978A CN 103701332 A CN103701332 A CN 103701332A
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Abstract
The invention discloses an intelligent power transformer on the basis of PWM (Pulse Width Modulation), which comprises a transformer. Three load leads, i.e. a lead I, a lead II and a lead III, are led out of a secondary coil of the transformer. The lead I is connected with one output end of the transformer and the lead II and the lead III are connected with the other output end of the transformer, so that the transformer outputs two different voltage values, wherein the lead II and the lead III are respectively connected in series with transistors; the side of the secondary coil of the transformer is provided with a voltage detection circuit, a current detection circuit, a load error amplification circuit and a PWM controller. The power transformer has a simple structure and reasonable and reliable design logic; current and voltage information at the load output end of the transformer is detected, is amplified and then is transmitted to the PWM controller, so that a generated pulse signal controls on-off of the transistors; automatic switching of different grades of voltages output by the transformer is implemented; the intelligent power transformer is safe and reliable.
Description
Technical field
The present invention relates to a kind of transformer, be specifically related to a kind of intelligent electric power transformer based on PWM.
Background technology
Power transformer is comprised of primary coil, iron core, secondary coil, and a transformer is only exported the magnitude of voltage of a grade conventionally, or several secondary coils are set, and by manual switchover, to export the voltage of different brackets; Function singleness or waste time and energy and have certain danger like this.Also released in the market some intelligent electric power transformers, but or structure is comparatively complicated, production cost is high, or can not reach people's requirement.
Pulse width modulation (PWM), it is the abbreviation of English " Pulse Width Modulation ", be called for short pulse-width modulation, be to utilize the numeral of microprocessor to export a kind of very effective technology that analog circuit is controlled, be widely used in many fields of controlling and convert from the power of measuring, communicate by letter.Pulse width modulation is a kind of analog control mode, and its variation according to respective loads carrys out the biasing of modulation transistor base stage or metal-oxide-semiconductor grid, realizes the change of transistor or metal-oxide-semiconductor ON time, thereby realizes the change of switching power supply output.This mode can make the output voltage of power supply keep constant when operation conditions change, is a kind of very effective technology of utilizing the digital signal of microprocessor to control analog circuit.But, also find no in the market in the Based Intelligent Control of the application of PWM technology and power transformer.
Summary of the invention
The object of the present invention is to provide a kind of intelligent electric power transformer based on PWM that can automatically control output voltage conversion.
To achieve these goals, the present invention has adopted following technical scheme:
An intelligent electric power transformer based on PWM, comprises transformer, and the secondary coil of transformer is drawn three load leads, is lead-in wire I, lead-in wire II and lead-in wire III; Described lead-in wire I is connecting an output of transformer, and another output of lead-in wire II and lead-in wire III connection transformer makes two different magnitudes of voltage of this transformer output; Wherein, described lead-in wire II and lead-in wire III are in series with respectively thyristor; Second coil side at transformer is provided with voltage detecting circuit, current detection circuit, load error amplifying circuit and PWM controller; The input of described voltage detecting circuit is connected with the output of transformer, and the signal output part of voltage detecting circuit is connected with load error amplifying circuit; The input of described current detection circuit is connecting an electric current induction coil, and signal output part is connected with load error amplifying circuit; Described electric current induction coil ring set is on a wherein load outlet line of transformer; The output of described load error amplifying circuit is connected with PWM controller; Described PWM controller is connected with the control line end of thyristor.
Intelligent electric power transformer of the present invention is received and is processed electric current, the information of voltage on output load line by PWM, and then send pulse signal, control conducting or the cut-out of thyristor, thereby realize the automatic conversion of transformer output voltage, without manually pulling diverter switch, safe and reliable.
Advantage of the present invention:
Simple in structure, design logic is rationally reliable, by detecting electric current, the information of voltage of transformer load output, after amplifying processing, flow to PWM controller, and then the pulse signal producing is controlled conducting or the cut-out of thyristor, realize the automatic switchover of transformer output different brackets voltage, safe and reliable.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention.
Reference numeral: 1-transformer, 2-thyristor, 3-electric current induction coil, 4-voltage detecting circuit, 5-current detection circuit, 6-load error amplifying circuit, 7-PWM controller.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment 1:
As shown in Figure 1, a kind of intelligent electric power transformer based on PWM, comprises transformer 1, and the secondary coil of transformer 1 is drawn three load leads, is lead-in wire I, lead-in wire II and lead-in wire III; Described lead-in wire I is connecting an output of transformer 1, and another output of lead-in wire II and lead-in wire III connection transformer makes two different magnitudes of voltage of this transformer 1 output; Wherein, described lead-in wire II and lead-in wire III are in series with respectively thyristor 2; Second coil side at transformer is provided with voltage detecting circuit 4, current detection circuit 5, load error amplifying circuit 6 and PWM controller 7; The described input of voltage detecting circuit 4 and the output of transformer are connected, and the signal output part of voltage detecting circuit is connected with load error amplifying circuit 6; The input of described current detection circuit 5 is connecting an electric current induction coil 3, and signal output part is connected with load error amplifying circuit 6; Described electric current induction coil 3 ring sets are on a wherein load outlet line of transformer 1; The output of described load error amplifying circuit 6 is connected with PWM controller 7; Described PWM controller 7 is connected with the control line end of thyristor 2.
This structure of power transformer is simple, design logic is rationally reliable, by detecting electric current, the information of voltage of transformer load output, after amplifying processing, flow to PWM controller, and then the pulse signal producing is controlled conducting or the cut-out of thyristor, realize the automatic switchover of transformer output different brackets voltage, safe and reliable.
Claims (1)
1. the intelligent electric power transformer based on PWM, comprises transformer (1), and the secondary coil of transformer (1) is drawn three load leads, is lead-in wire I, lead-in wire II and lead-in wire III; Described lead-in wire I is connecting an output of transformer (1), and another output of lead-in wire II and lead-in wire III connection transformer, makes two different magnitudes of voltage of this transformer (1) output; It is characterized in that: described lead-in wire II and lead-in wire III are in series with respectively thyristor (2); Second coil side at transformer is provided with voltage detecting circuit (4), current detection circuit (5), load error amplifying circuit (6) and PWM controller (7); The input of described voltage detecting circuit (4) is connected with the output of transformer, and the signal output part of voltage detecting circuit is connected with load error amplifying circuit (6); The input of described current detection circuit (5) is connecting an electric current induction coil (3), and signal output part is connected with load error amplifying circuit (6); Described electric current induction coil (3) ring set is on a wherein load outlet line of transformer (1); The output of described load error amplifying circuit (6) is connected with PWM controller (7); Described PWM controller (7) is connected with the control line end of thyristor (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715978.1A CN103701332A (en) | 2013-12-23 | 2013-12-23 | Intelligent power transformer on basis of PWM (Pulse Width Modulation) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715978.1A CN103701332A (en) | 2013-12-23 | 2013-12-23 | Intelligent power transformer on basis of PWM (Pulse Width Modulation) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103701332A true CN103701332A (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310715978.1A Pending CN103701332A (en) | 2013-12-23 | 2013-12-23 | Intelligent power transformer on basis of PWM (Pulse Width Modulation) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103701332A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002071589A1 (en) * | 2001-03-05 | 2002-09-12 | Sony Corporation | Switching power source circuit with drive frequency variably controlled by switching element |
| US6469921B2 (en) * | 2000-03-21 | 2002-10-22 | Sansha Electric Manufacturing Company, Limited | Power supply apparatus |
| CN1455981A (en) * | 2001-01-19 | 2003-11-12 | 索尼公司 | Switch power supply device |
| JP2004208379A (en) * | 2002-12-24 | 2004-07-22 | Canon Inc | Multi-output switching power supply |
| CN1742423A (en) * | 2004-02-03 | 2006-03-01 | 株式会社村田制作所 | Switching power supply |
-
2013
- 2013-12-23 CN CN201310715978.1A patent/CN103701332A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6469921B2 (en) * | 2000-03-21 | 2002-10-22 | Sansha Electric Manufacturing Company, Limited | Power supply apparatus |
| CN1455981A (en) * | 2001-01-19 | 2003-11-12 | 索尼公司 | Switch power supply device |
| WO2002071589A1 (en) * | 2001-03-05 | 2002-09-12 | Sony Corporation | Switching power source circuit with drive frequency variably controlled by switching element |
| JP2004208379A (en) * | 2002-12-24 | 2004-07-22 | Canon Inc | Multi-output switching power supply |
| CN1742423A (en) * | 2004-02-03 | 2006-03-01 | 株式会社村田制作所 | Switching power supply |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140402 |