CN205490156U - Quasi -resonance is turned over and is swashed switching power supply - Google Patents
Quasi -resonance is turned over and is swashed switching power supply Download PDFInfo
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- CN205490156U CN205490156U CN201620235061.0U CN201620235061U CN205490156U CN 205490156 U CN205490156 U CN 205490156U CN 201620235061 U CN201620235061 U CN 201620235061U CN 205490156 U CN205490156 U CN 205490156U
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Abstract
The utility model relates to a quasi -resonance is turned over and is swashed switching power supply specifically includes accurate resonant switch power supply circuit, synchro control module, auxiliary power supply circuit, auxiliary power supply circuit has control system and includes three drive signal end for provide drive signal energy store, the grid of auxiliary switch pipe is connected to the drive signal end, and auxiliary winding and second electric capacity are connected to other both ends of auxiliary switch pipe, accurate resonant switch power supply circuit has the grid of main switch pipe and connects transformer primary winding and first condenser are connected to control system's drive signal end, other both ends of main switch pipe, accurate resonant switch power supply circuit still has the transformer is connected respectively to auxiliary switch pipe drain electrode and source electrode secondary and third condenser, the drive signal end of synchro control module input connection control system, the grid of auxiliary switch pipe is connected to synchro control module output.
Description
Technical field
The present invention relates to field of switch power, particularly a kind of quasi-resonance inverse-excitation type switch power-supply.
Background technology
Along with the development of electron electric power technology, Switching Power Supply is progressively risen.Wherein inverse-excitation type switch power-supply has the advantages such as simple in construction, volume be little.But, in the case of output voltage is higher, switch pipe turn-on consumption is relatively big, now greatly reduces the work efficiency of Switching Power Supply.
It is illustrated in figure 1 traditional inverse-excitation type switch power-supply circuit, the armature winding Np limit only having transformator T11 is provided with a switching tube Q11, PWM controls U1 output HIGH voltage, switching tube is open-minded, now the turning-on voltage of switching tube is the highest, bring the biggest turn-on consumption, seriously reduce the work efficiency of Switching Power Supply.
Utility model content
The utility model proposes a kind of quasi-resonance reverse exciting switching voltage regulator.
A kind of quasi-resonance reverse exciting switching voltage regulator, specifically includes Quasi-resonant switching power supply circuit, synchronization control module, auxiliary power supply circuit；Described auxiliary power supply circuit has control system and includes that three drive signal end, is used for providing driving signal to store energy, and described driving signal end connects the grid of auxiliary switch, and the another two ends of auxiliary switch connect auxiliary winding and the second electric capacity；Described Quasi-resonant switching power supply circuit has the driving signal end of the grid described control system of connection of main switch, main switch another two ends connection transformer armature winding and the first capacitor, described Quasi-resonant switching power supply circuit also has auxiliary switch drain electrode and the secondary windings of source electrode connection transformer respectively and the 3rd capacitor；The driving signal end of described synchronization control module input connection control system, synchronization control module outfan connects the grid of auxiliary switch.
Further, described Quasi-resonant switching power supply circuit comprises resistance, main switch, the armature winding of transformator and the secondary windings of transformator, diode, synchro switch pipe and the 3rd electric capacity, the drain electrode of described main switch is connected with the different name end of primary winding, the Same Name of Ends of armature winding is connected with input anode, the source electrode of main switch is connected with input negative terminal, the grid of main switch is connected with the driving signal end of control system, the second resistance in parallel between main switch source electrode and grid；The different name end of transformer secondary output winding is connected and terminating output plus terminal with one end of filtering the 3rd electric capacity, the drain electrode of termination synchro switch pipe of the same name, the source electrode of synchro switch pipe connects the other end of the 3rd capacitor and is connected with output negative terminal, the grid of synchro switch pipe connects synchronization control module, the driving signal end of the input connection control system of synchronization control module；Described synchronization control module connects power-feed section VCC and reference ground GND, power-feed section VCC and with reference to connecting the 4th capacitor between ground GND, and the 4th capacitor connection has been also connected with outfan-Vo with reference to one end of ground GND.
Further, above-mentioned auxiliary power supply circuit comprises auxiliary switch, the auxiliary winding of transformator, the first resistance, electric capacity, control system, the source electrode of described auxiliary switch is connected with the different name end of auxiliary winding, the termination input negative terminal of the same name of transformator auxiliary winding, the drain electrode of auxiliary switch is connected with the VCC end of electric capacity C2 and control system respectively, another termination input negative terminal of electric capacity C2, the grid of auxiliary switch is connected with the driving signal end G2 of control system, the first resistance in parallel between the grid of auxiliary switch Q2 and source electrode.
Relative to the basis in prior art, above-mentioned technology is used to provide the benefit that: to add control system and synchronization control module on the basis of Quasi-resonant switching power supply, before the switching tube on armature winding limit is opened, the synchro switch pipe Q3 on secondary windings limit is the most open-minded, realize the reverse excitation of armature winding, produce negative phase current, it is achieved armature winding limit main switch Q1 no-voltage is open-minded, effectively reduce the turn-on consumption of main switch, improve the work efficiency of power supply.Add control signal to control synchro switch tube voltage height, and then control synchro switch pipe Q3 service time length, further increase the work efficiency of Switching Power Supply.
Accompanying drawing explanation
Fig. 1 is traditional inverse-excitation type switch power-supply circuit.
Fig. 2 is this utility model quasi-resonance reverse exciting switching voltage regulator circuit diagram.
Fig. 3 is utility model works voltage sequential chart.
Detailed description of the invention
In conjunction with accompanying drawing, this utility model is described further.
A kind of quasi-resonance reverse exciting switching voltage regulator, it specifically includes Quasi-resonant switching power supply circuit, synchronization control module U2, auxiliary power supply circuit；Described auxiliary power supply circuit has control system U1 and includes that three drive signal end G1, G2, G3, for providing driving signal to store energy, described driving signal end G2 connects the grid of auxiliary switch Q2, and the another two ends of auxiliary switch Q2 connect auxiliary winding Np2 and capacitor C2；Described Quasi-resonant switching power supply circuit has the driving signal end G1 of grid described control system U1 of connection of main switch Q1, main switch Q1 another two ends connection transformer T1 armature winding Np1 and capacitor C1, described Quasi-resonant switching power supply circuit also has auxiliary switch Q3 drain electrode and the secondary windings Ns1 and capacitor C3 of source terminal connection transformer T1 respectively；The driving signal end G3 of described synchronization control module U2 input connection control system U1, synchronization control module U2 outfan G31 connect the grid of auxiliary switch Q3.
Further, described Quasi-resonant switching power supply circuit specifically comprises resistance R2, main switch Ql, armature winding Np1 and secondary windings Nsl, diode Dl, synchro switch pipe Q3 and capacitor C3, the drain electrode of described main switch Ql is connected with the different name end of armature winding Np1, the Same Name of Ends of armature winding Np1 is connected with input anode+Vin, the source electrode of main switch Ql is connected with capacitor C2, reconnect input negative terminal-Vin, parallel discharge resistance R2 between main switch Ql source electrode and grid；The different name end of secondary windings Nsl is connected with one end of filter capacitor C3 and terminating output plus terminal+Vo, the drain electrode of the termination synchro switch pipe Q3 of the same name of secondary windings Nsl, the source electrode of synchro switch pipe Q3 connects the other end of capacitor C3 and is connected with output negative terminal-Vo, the grid of synchro switch pipe Q3 connects the outfan G31 of synchronization control module U2, and the input of described synchronization control module U2 connects driving signal end G3.Described synchronization control module U2 connects power-feed section VCC and reference ground GND, power-feed section VCC and has been also connected with outfan-Vo with reference to connecting capacitor C4, capacitor C4 connection one end with reference to ground GND between ground GND.Capacitor C4 is the filter capacitor of synchronous control system U2 feeder ear VCC, feeder ear VCC voltage is provided by outfan+Vo, when going between farther out, being introduced into external interference signals in lead-in wire, voltage is available to synchronous control system after C4 filters, it is thus achieved that the voltage that a comparison is clean, control system operationally internal circuit can carry out discharge and recharge simultaneously, capacitor C4 plays the effect of energy storage, is powered to late-class circuit by the energy of storage, improves the stability of synchronous control system.
Auxiliary power supply circuit, specifically comprises auxiliary switch Q2, the auxiliary winding Np2 of transformator T1, resistance R1, electric capacity C2, control system Ul；Described driving signal end G2 connects the grid of auxiliary switch Q2, the source electrode of auxiliary switch Q2 is connected with the different name end of auxiliary winding Np2, the termination input negative terminal of the same name of auxiliary winding Np2, the drain electrode of auxiliary switch Q2 is connected with the feeder ear VCC of capacitor C2 and control system Ul respectively, another termination input negative terminal-Vin of capacitor C2；Parallel resistance R1 between the grid of auxiliary switch Q2 and source electrode.
Described quasi-resonance flyback sourse operation principle is as follows: be illustrated in figure 3 the working timing figure of each module, and G2 is the driving signal of auxiliary switch Q2, and G1 is the driving signal of main switch Q1, and G31 is the driving signal of synchronous rectification switch pipe Q3.△ t1 is the time delay of the driving signal end G1 of main switch Ql, and △ t2 is the pulse width driving signal end G2, and open-minded in order to be able to realize no-voltage, △ t1 need to be more than △ t2.When driving signal end G1 to be in low level, the driving signal end G1 of control system U1 is become low level from height is flat.The now secondary windings Nsl polarity upset of transformator T1, synchro switch pipe Q3 turns on, the portion of energy that transformator T1 is stored is transferred to storage capacitor C3, and exports through output plus terminal and power to load resistance；Auxiliary winding Np2 polarity also overturns simultaneously, the auxiliary switch Q2 parasitic diode conducting being connected with auxiliary winding Np2, and the portion of energy in transformator T1 is transferred to electric capacity C2 energy storage by auxiliary winding Np2, and powers to control system.This process lasts till that in transformator T1, energy release is complete.
In the △ t2 time, the driving signal end G2 of control system U1 becomes high level, auxiliary switch Q2 turns on, in auxiliary power supply circuit, in electric capacity C2, the energy of storage carries out reverse excitation energy storage by switching tube Q2 to the auxiliary winding Np2 of transformator T1, secondary synchro switch pipe Q3 turns off, after △ t2 terminates, turn off auxiliary switch Q2, auxiliary winding Np2 polarity upset, bear just down in primary side winding Np1, the negative current produced flows to power supply input anode+Vin by the parasitic diode of main switch Ql, it is stored in the energy in accessory power supply electric capacity C2 the most effectively to feed back to input anode+Vin.
After the △ t2 time, sequential enters △ t1 time delay, and the most all switching tubes are all not turned on, and before negative current direction overturns, realize, for main switch Ql, the condition that no-voltage is opened.
After △ t1 time delay, sequential enters △ t3, at this moment G1 is that high level drives main switch Q1 conducting, supply voltage sends into transformator after C1 filters, making primary winding flow through electric current, the sense of current is upper just lower negative, now just upper negative under transformer secondary output winding, electric current can not be flow through, so being all stored in transformator in △ t3 time self-energy.
After sequential △ t3, main switch Q1 turns off, and has stored energy in transformator.Enter into △ t4 sequential, at this moment synchro switch pipe Q3 conducting, owing to polarity of transformer is reverse, secondary windings polarity becomes upper just lower negative, energy in transformator returns to secondary windings lower end through secondary windings upper end to capacitor C3 after load arrives synchro switch pipe Q3, and the energy in such transformator just can provide energy to successive load.
After sequential △ t4, main circuit has worked a complete cycle, until auxiliary switch Q2 turns on again, from this by above sequential circulation work.
Although technology contents of the present utility model is open as above with preferably example; but it is not limited to this utility model; if those skilled in the art; it is altered or modified at the unsubstantiality done without departing from spirit of the present utility model, all should belong to this utility model protective scope of the claims.
Claims (3)
1. a quasi-resonance reverse exciting switching voltage regulator, it is characterised in that include Quasi-resonant switching power supply circuit, synchronization control module (U2), auxiliary power supply circuit；Described auxiliary power supply circuit has control system (U1) and includes that three drive signal end (G1, G2, G3), for providing driving signal to store energy, described driving signal end (G2) connects the grid of auxiliary switch (Q2), and the another two ends of auxiliary switch (Q2) connect auxiliary winding (Np2) and capacitor (C2)；Described Quasi-resonant switching power supply circuit has the driving signal end (G1) of the grid described control system of connection (U1) of main switch (Q1), another two ends connection transformer (T1) armature winding (Np1) of main switch (Q1) and capacitor (C1), described Quasi-resonant switching power supply circuit also has auxiliary switch (Q3) drain electrode and the secondary windings (Ns1) of source terminal connection transformer (T1) respectively and capacitor (C3)；The driving signal end (G3) of described synchronization control module (U2) input connection control system (U1), synchronization control module (U2) outfan (G31) connects the grid of auxiliary switch (Q3).
2. quasi-resonance reverse exciting switching voltage regulator as claimed in claim 1, it is characterised in that described Quasi-resonant switching power supply circuit comprises resistance (R2), main switch (Ql), armature winding (Np1) and secondary windings (Nsl), diode (Dl), synchro switch pipe (Q3) and capacitor (C3)；The drain electrode of described main switch (Ql) is connected with the different name end of armature winding (Np1), the Same Name of Ends of armature winding (Np1) is connected with input anode+Vin, the source electrode of main switch (Ql) is connected with capacitor (C2), reconnect input negative terminal-Vin, main switch (Ql) parallel discharge resistance (R2) between source electrode and grid；The different name end of secondary windings (Nsl) is connected with one end of filter capacitor (C3) and terminating output plus terminal+Vo, the drain electrode of termination synchro switch pipe (Q3) of the same name of secondary windings (Nsl), the source electrode of synchro switch pipe (Q3) connects the other end of capacitor (C3) and is connected with output negative terminal-Vo, the grid of synchro switch pipe (Q3) connects the outfan (G31) of synchronization control module (U2), and the input of described synchronization control module (U2) connects driving signal end (G3)；Described synchronization control module (U2) connects power-feed section VCC and connects capacitor (C4) with reference to ground GND, power-feed section VCC with between ground GND, and one end that capacitor (C4) connects with reference to ground GND has been also connected with outfan-Vo.
3. quasi-resonance reverse exciting switching voltage regulator as claimed in claim 2, it is characterised in that described auxiliary power supply circuit comprises auxiliary switch (Q2), auxiliary winding (Np2), resistance (R1), electric capacity (C2), control system (Ul)；The driving signal end (G2) of described control system (Ul) connects the grid of auxiliary switch (Q2), the source electrode of auxiliary switch (Q2) is connected with the different name end of auxiliary winding (Np2), the termination input negative terminal of the same name of auxiliary winding (Np2), the drain electrode of auxiliary switch (Q2) feeder ear VCC with capacitor (C2) and control system (Ul) respectively is connected, another termination input negative terminal-Vin of capacitor (C2)；Parallel resistance (R1) between the grid of auxiliary switch (Q2) and source electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620235061.0U CN205490156U (en) | 2016-03-25 | 2016-03-25 | Quasi -resonance is turned over and is swashed switching power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620235061.0U CN205490156U (en) | 2016-03-25 | 2016-03-25 | Quasi -resonance is turned over and is swashed switching power supply |
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| CN205490156U true CN205490156U (en) | 2016-08-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769575A (en) * | 2017-11-28 | 2018-03-06 | 苏州汇川技术有限公司 | Inverse-excitation type switch power-supply circuit |
| CN108512442A (en) * | 2017-11-27 | 2018-09-07 | 昂宝电子（上海）有限公司 | Switching power control system |
| WO2020034665A1 (en) * | 2018-08-17 | 2020-02-20 | 广州金升阳科技有限公司 | Coil control circuit of contactor |
| CN111917301A (en) * | 2020-06-17 | 2020-11-10 | 广州金升阳科技有限公司 | Positive and negative excitation auxiliary circuit and switching power supply circuit comprising same |
| CN113131746A (en) * | 2021-03-16 | 2021-07-16 | 广州金升阳科技有限公司 | Flyback converter control method and control device |
-
2016
- 2016-03-25 CN CN201620235061.0U patent/CN205490156U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108512442A (en) * | 2017-11-27 | 2018-09-07 | 昂宝电子（上海）有限公司 | Switching power control system |
| CN108512442B (en) * | 2017-11-27 | 2020-11-13 | 昂宝电子（上海）有限公司 | Switching power supply control system |
| CN107769575A (en) * | 2017-11-28 | 2018-03-06 | 苏州汇川技术有限公司 | Inverse-excitation type switch power-supply circuit |
| WO2020034665A1 (en) * | 2018-08-17 | 2020-02-20 | 广州金升阳科技有限公司 | Coil control circuit of contactor |
| CN111917301A (en) * | 2020-06-17 | 2020-11-10 | 广州金升阳科技有限公司 | Positive and negative excitation auxiliary circuit and switching power supply circuit comprising same |
| CN113131746A (en) * | 2021-03-16 | 2021-07-16 | 广州金升阳科技有限公司 | Flyback converter control method and control device |
| CN113131746B (en) * | 2021-03-16 | 2022-08-19 | 广州金升阳科技有限公司 | Flyback converter control method and control device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20210325 |