CN202183735U - High-effective and simple intelligent control circuit - Google Patents
High-effective and simple intelligent control circuit Download PDFInfo
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- CN202183735U CN202183735U CN2011202737315U CN201120273731U CN202183735U CN 202183735 U CN202183735 U CN 202183735U CN 2011202737315 U CN2011202737315 U CN 2011202737315U CN 201120273731 U CN201120273731 U CN 201120273731U CN 202183735 U CN202183735 U CN 202183735U
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Abstract
The utility model discloses a high-effective and simple intelligent control circuit. The control circuit comprises a main transformation module, a PWM/OVP (Pulse-Width Modulation/Over Voltage Protection) control module, a follow current rectifying filtering module and a voltage feedback module, wherein the external power source inputting into the main transformation module is output to the follow current rectifying filtering module after the voltage change of the main transformation module and is output to load for supplying power after the rectification filtering of the follow current rectifying filtering module; the PWM/OVP control module controls the main transformation module to work; the voltage feedback module detects the output voltage of the main transformation module and load power supply voltage to feed back to the PWM/OVP control module. The control reference of the feedback circuit is accurately adjusted through detecting the change of the output electric potential, so that the adjustment time is quick, and the ideal output voltage can be obtained according to the requirement of the terminal; in addition, the whole process is intelligently controlled, effective and cannot be damaged because of repeated work, so that the service life of the power source is long, the terminal user is convenient to use, and the investment cost is greatly reduced.
Description
Technical field
The utility model discloses a kind of switching power circuit, particularly a kind of efficient simple intelligence control circuit.
Background technology
Development along with Switching Power Supply; The application of Switching Power Supply in people life more and more widely, the output voltage of traditional switching power circuit all is changeless, if when wanting to change its output voltage; Has only the control benchmark of adjusting feedback circuit through the mode of serial connection potentiometer (being adjustable resistance); Thereby just can make output voltage obtain changing, this kind mode need be adjusted manually, and voltage adjustment precision is not high; Be difficult to doing the trick, and potentiometer is worked repeatedly and was lost efficacy easily and then useful life that influence is whole.
Summary of the invention
Adjust the size of output voltage through the mode of potentiometer to the above-mentioned Switching Power Supply of mentioning of the prior art; Awkward shortcoming; The utility model provides a kind of new efficient simple intelligence control circuit; It feeds back to the PWM/OVP control module through detecting output voltage with it, realizes automatic control output voltage.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of efficient simple intelligence control circuit; Control circuit comprises main transformer die change piece, PWM/OVP control module, afterflow rectification filtering module and Voltage Feedback module; External power supply input main transformer die change piece; After main transformer die change piece carries out voltage transformation, export to the afterflow rectification filtering module, after the afterflow rectification filtering module carries out rectifying and wave-filtering, export to load and supply power, the work of PWM/OVP control module control main transformer die change piece; The Voltage Feedback module detects main transformer die change piece output voltage and electric voltage simultaneously, and feeds back to the PWM/OVP control module.
The technical scheme that its technical problem that solves the utility model adopts further comprises:
Described control circuit also comprises rectification module, and external AC is exported to main transformer die change piece after being rectified into direct current through rectification module.
Described control circuit also comprises the EMI filtration module, after the filtering of external AC process EMI filtration module, exports to rectification module.
Described control circuit also comprises lightning protection and overcurrent protection module, and external AC is exported to the EMI filtration module through lightning protection and overcurrent protection module.
Described Voltage Feedback module comprises triode Q2, three terminal regulator U3 and optocoupler U2; Electric voltage feeds back to the base stage of triode Q2 through resistance R 23; The base stage of triode Q2 is through resistance R 24 ground connection; The grounded emitter of triode Q2, the collector electrode of triode Q2 is connected with the control end of three terminal regulator U3 through resistance R 21, and the base stage of triode Q2 is connected with the control end of three terminal regulator U3 through resistance R 22 simultaneously; The control end of three terminal regulator U3 is through resistance R 20 ground connection; The control end of three terminal regulator U3 is connected to the output of afterflow rectification filtering module through resistance R 18, and the input of afterflow rectification filtering module is through resistance R 14, optocoupler U2 and the three terminal regulator U3 ground connection of series connection successively, and optocoupler U2 is connected to the feedback end of PWM/OVP control module.
The beneficial effect of the utility model is: the utility model comes the accurately control benchmark of adjustment feedback circuit through the potential change that detects output; The adjustment time is fast; And can obtain desirable output voltage according to terminal requirements, whole process Based Intelligent Control efficiently and is repeatedly worked and can not damaged; Power supply useful life is prolonged, let the easy to use and input cost of terminal use reduce greatly.
To combine accompanying drawing and embodiment that the utility model is further specified below.
Description of drawings
Fig. 1 is the utility model circuit block diagram.
Fig. 2 is the utility model circuit theory diagrams.
Fig. 3 is the utility model integrated circuit schematic diagram.
Embodiment
Present embodiment is the utility model preferred implementation, and other all its principles are identical with present embodiment or approximate with basic structure, all within the utility model protection range.
Please referring to accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, the utility model comprises main transformer die change piece, PWM/OVP control module, afterflow rectification filtering module and Voltage Feedback module, in the present embodiment; Adopt external AC to supply power, control circuit also comprises rectification module, EMI filtration module and lightning protection and overcurrent protection module, in the present embodiment; On the input live wire, be serially connected with protective tube F1, be used for overcurrent protection, piezo-resistance is arranged at input live wire and the cross-over connection of zero line support; Be used for lightning protection, external AC is exported to the EMI filtration module through lightning protection and overcurrent protection module, in the present embodiment; The EMI filtration module comprises inductance L F1, capacitor C X1 and the inductance L F2 that " H " shape connects, and is used for the EMI of external input power supply is carried out filtering, after the filtering of external AC process EMI filtration module; Export to rectification module, in the present embodiment, rectification module adopts bridge rectifier or adopts rectifier bridge; External AC is exported to main transformer die change piece after being rectified into direct current through rectification module.In the present embodiment, main transformer die change piece is mainly switching tube Q1, and the PWM/OVP control module is mainly PWM chip U1; The work of the GATE pin of PWM chip U1 output control signal control main transformer die change piece, the i.e. break-make of control switch pipe Q1, the break-make through the switching tube Q1 direct current conversion high-frequency alternating current after with rectification; Carry out exporting to the afterflow rectification filtering module after the transformation through transformer T1 then; In the present embodiment, the afterflow rectification filtering module mainly comprises afterflow inductance L 1, capacitor C 11, capacitor C 12, capacitor C 13 and capacitor C 14, and afterflow inductance L 1 is serially connected on the bus; Capacitor C 11, capacitor C 12, capacitor C 13 and capacitor C 14 are connected across respectively between bus and the ground; Convert high-frequency alternating current to direct current through the afterflow rectification filtering module and export to load, in the present embodiment, motor coil is adopted in load.In the present embodiment, also include the Voltage Feedback module, the Voltage Feedback module detects main transformer die change piece output voltage and electric voltage simultaneously; And feeding back to the PWM/OVP control module, in the present embodiment, the Voltage Feedback module mainly comprises triode Q2, three terminal regulator U3 and optocoupler U2; Electric voltage, promptly PG (the POWER GOOD signal in the power supply) holds the base stage that feeds back to triode Q2 through resistance R 23, and the base stage of triode Q2 is through resistance R 24 ground connection; The grounded emitter of triode Q2; The collector electrode of triode Q2 is connected with the control end of three terminal regulator U3 through resistance R 21, and the base stage of triode Q2 is connected with the control end of three terminal regulator U3 through resistance R 22 simultaneously, and the control end of three terminal regulator U3 is through resistance R 20 ground connection; The control end of three terminal regulator U3 is connected to the output of afterflow rectification filtering module through resistance R 18; Be the output of afterflow inductance L 1, the input of afterflow rectification filtering module is in the present embodiment; Be resistance R 14, optocoupler U2 and the three terminal regulator U3 ground connection of input through connecting successively of afterflow inductance L 1, optocoupler U2 is connected to the feedback end of PWM/OVP control module.In the secondary winding of transformer T1, be provided with auxiliary winding, in the present embodiment, on the auxiliary winding of transformer T1, be connected with voltage-stabiliser tube ZD2, give PWM chip U1 power supply through auxiliary winding.
In the utility model, when selecting the AC mains-supplied, but the voltage Based Intelligent Control of output; Voltage range 3.0V ~ 48.0V (control signal comes from the CPU of load), the load of this circuit is a motor coil, when the oepration at full load of output motor; The PG end produces high level (being generally 5V), after amplifying through driving resistor R23, resistance R 24 and triode Q2, this control signal is sent to three terminal regulator U3; When its reference voltage reduces; The FB that feeds back to PWM chip U1 through optocoupler U2 holds, and the duty that strengthens main switch circuit recently promotes output voltage, drives load motor; The load motor rotating speed is improved; When output motor standby or low-speed running, the PG end produces low level (0V), through driving resistor R23; After resistance R 24 is amplified with triode Q2; This control signal is sent to three terminal regulator U3,, feeds back to the FB end of PWM chip U1 through optocoupler U2 when its reference voltage raises; The duty that reduces main switch circuit recently reduces output voltage, and the load motor rotating speed reduces.
The utility model comes the accurately control benchmark of adjustment feedback circuit through the potential change that detects output; The adjustment time is fast; And can obtain desirable output voltage according to terminal requirements, whole process Based Intelligent Control efficiently and is repeatedly worked and can not damaged; Power supply useful life is prolonged, let the easy to use and input cost of terminal use reduce greatly.
Claims (5)
1. efficient simple intelligence control circuit; It is characterized in that: described control circuit comprises main transformer die change piece, PWM/OVP control module, afterflow rectification filtering module and Voltage Feedback module; External power supply input main transformer die change piece; After main transformer die change piece carries out voltage transformation, export to the afterflow rectification filtering module, after the afterflow rectification filtering module carries out rectifying and wave-filtering, export to load and supply power, the work of PWM/OVP control module control main transformer die change piece; The Voltage Feedback module detects main transformer die change piece output voltage and electric voltage simultaneously, and feeds back to the PWM/OVP control module.
2. efficient simple intelligence control circuit according to claim 1, it is characterized in that: described control circuit also comprises rectification module, external AC is exported to main transformer die change piece after being rectified into direct current through rectification module.
3. efficient simple intelligence control circuit according to claim 2, it is characterized in that: described control circuit also comprises the EMI filtration module, after the filtering of external AC process EMI filtration module, exports to rectification module.
4. efficient simple intelligence control circuit according to claim 3, it is characterized in that: described control circuit also comprises lightning protection and overcurrent protection module, external AC is exported to the EMI filtration module through lightning protection and overcurrent protection module.
5. according to any described efficient simple intelligence control circuit in the claim 1 to 4; It is characterized in that: described Voltage Feedback module comprises triode Q2, three terminal regulator U3 and optocoupler U2; Electric voltage feeds back to the base stage of triode Q2 through resistance R 23; The base stage of triode Q2 is through resistance R 24 ground connection; The grounded emitter of triode Q2, the collector electrode of triode Q2 is connected with the control end of three terminal regulator U3 through resistance R 21, and the base stage of triode Q2 is connected with the control end of three terminal regulator U3 through resistance R 22 simultaneously; The control end of three terminal regulator U3 is through resistance R 20 ground connection; The control end of three terminal regulator U3 is connected to the output of afterflow rectification filtering module through resistance R 18, and the input of afterflow rectification filtering module is through resistance R 14, optocoupler U2 and the three terminal regulator U3 ground connection of series connection successively, and optocoupler U2 is connected to the feedback end of PWM/OVP control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202737315U CN202183735U (en) | 2011-07-30 | 2011-07-30 | High-effective and simple intelligent control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202737315U CN202183735U (en) | 2011-07-30 | 2011-07-30 | High-effective and simple intelligent control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202183735U true CN202183735U (en) | 2012-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202737315U Expired - Lifetime CN202183735U (en) | 2011-07-30 | 2011-07-30 | High-effective and simple intelligent control circuit |
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| CN (1) | CN202183735U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103546017A (en) * | 2013-10-29 | 2014-01-29 | 大连生容享科技有限公司 | Power adaption system |
| CN104518711A (en) * | 2013-09-30 | 2015-04-15 | 贵州航天电子科技有限公司 | Coding technology based stepless speed regulating circuit of motor |
| CN105048823A (en) * | 2015-09-17 | 2015-11-11 | 航天长峰朝阳电源有限公司 | Multi-winding series-connection fly-back type extra-high voltage output wide range adjustable power module |
| CN109327018A (en) * | 2017-08-01 | 2019-02-12 | 深圳市暗能量电源有限公司 | LED street lamp driving power lightning protection circuit |
| WO2019134123A1 (en) * | 2018-01-05 | 2019-07-11 | 孟加顷 | Switch power supply circuit |
-
2011
- 2011-07-30 CN CN2011202737315U patent/CN202183735U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518711A (en) * | 2013-09-30 | 2015-04-15 | 贵州航天电子科技有限公司 | Coding technology based stepless speed regulating circuit of motor |
| CN103546017A (en) * | 2013-10-29 | 2014-01-29 | 大连生容享科技有限公司 | Power adaption system |
| CN105048823A (en) * | 2015-09-17 | 2015-11-11 | 航天长峰朝阳电源有限公司 | Multi-winding series-connection fly-back type extra-high voltage output wide range adjustable power module |
| CN109327018A (en) * | 2017-08-01 | 2019-02-12 | 深圳市暗能量电源有限公司 | LED street lamp driving power lightning protection circuit |
| WO2019134123A1 (en) * | 2018-01-05 | 2019-07-11 | 孟加顷 | Switch power supply circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120404 |