CN105490543A - Circuit and full-bridge converter - Google Patents
Circuit and full-bridge converter Download PDFInfo
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- CN105490543A CN105490543A CN201410475244.5A CN201410475244A CN105490543A CN 105490543 A CN105490543 A CN 105490543A CN 201410475244 A CN201410475244 A CN 201410475244A CN 105490543 A CN105490543 A CN 105490543A
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Abstract
The invention discloses a circuit and a full-bridge converter. The circuit includes an auxiliary circuit and a rectifier circuit; the auxiliary circuit includes a first connecting end, a second connecting end and a third connecting end, and the rectifier circuit includes a first access end, a second access end and a third access end; the first connecting end is connected with a positive electrode of a power supply, and is connected with the first access end of the rectifier circuit; the second connecting end is connected with a negative electrode of the power supply, and is connected with the second access end of the rectifier circuit; and the third connecting end of the auxiliary circuit is connected with the third access end of the rectifier circuit. According to the technical scheme of the circuit, through the addition of the auxiliary circuit, an auxiliary current is provided, and the current direction of the auxiliary current and the direction of a loop current in the circuit are kept the same, and thus the technical problem that when the loop current is relatively small, discharge of capacitors in the rectifier circuit is incomplete, and the capacitors are easy to damage in a working process of a system is solved.
Description
Technical field
The present invention relates to electronic circuit technology field, particularly relate to a kind of circuit and full-bridge converter.
Background technology
At present, when using the full-bridge converter circuit application of IGBT in the environment that loop current is less, when different switching tubes carries out conducting cut-out conversion, because loop current is little, electric charge on electric capacity corresponding with it on leading-bridge switching tube can not be taken out completely to the greatest extent, therefore leading-bridge switching tube is caused to lose the condition of zero voltage switch, and the Zero Current Switch condition that lagging leg switching tube loses.
Be illustrated in figure 1 the full-bridge converter circuit diagram of a use IGBT, switch S 1 ' and switch S 3 ' are leading-bridge switching tube, C1 ' is the electric capacity that arranges corresponding to S1 ', and C3 ' is the electric capacity that arranges corresponding to S3 ', and switch S 2 ' and switch S 4 ' are lagging leg switching tube.
For advanced arm switch pipe S3 ', owing to inevitably there is control time gap in practical work process, before S3 ' opens, exist in a Dead Time, S2 ' is for conducting state and S3 ' is off state, now can form the state that C1 ' discharges, but, due to when when loop current is less, the electric current put from C1 ' lower end outflow a ' is also less, therefore easily cause and C1 ' discharge off S3 ' can not be made then to be adjusted to opening state in Dead Time, now flow out the electric current that a ' puts and reduce to zero, cause C1 ' not discharge completely.
That is, when loop current is little, the electric charge of S1 ' and S3 ' when carrying out switch conduction cut-out conversion on electric capacity C1 ' and C3 ' can not be taken out to the greatest extent completely, S1 ' and S3 ' is carrying out the voltage at two ends when switch conduction cuts off conversion and non-vanishing, when S1 ' and S3 ' opens, the energy abrupt release that electric capacity C1 ' and C3 ' stores, not only add current stress and the loss of switch, electric capacity C1 ' and C3 ' is also easy to impaired, once C1 ' or C3 ' is breakdown, S1 ' or S3 ' will be shorted, thus cause the damage of circuit, reduce the reliability of Circuits System.
Therefore, rectification circuit of the prior art also exists when when loop current is little, electric charge on electric capacity in rectification circuit cuts off in conversion at switch conduction and can not be taken out completely to the greatest extent, thus the technical problem causing described electric capacity easily impaired in system work process.
Summary of the invention
The application provides a kind of circuit, also exist when when loop current is little in order to solve rectification circuit of the prior art, electric charge on the electric capacity that leading-bridge Switch Controller should be arranged cuts off in conversion at switch conduction and can not be taken out completely to the greatest extent, thus the technical problem causing the electric capacity in rectification circuit easily impaired in system work process.
The application on the one hand provides a kind of circuit, and described circuit comprises: auxiliary circuit and rectification circuit, and described rectification circuit is in order to being ac output current by the rectification of direct current input current;
Described auxiliary circuit comprises the first link, the second link and the 3rd link, and described rectification circuit comprises: the first incoming end, the second incoming end, the 3rd incoming end;
Described first link connects positive source, and described first link connects the first incoming end of described rectification circuit;
Described second link connects power cathode, and described second link connects described rectification circuit second incoming end;
3rd link of described auxiliary circuit connects the 3rd incoming end in described rectification circuit;
Wherein, described auxiliary circuit in order to provide an auxiliary current at predetermined time to described rectification circuit, to increase the loop current in described rectification circuit.
Preferably, described rectification circuit comprises the first lateral circuit and the second lateral circuit, described first lateral circuit comprise first with second, and described first with described second in parallel;
Described first comprises the first switching tube and the 3rd switching tube, and described first switching tube is connected with described 3rd switching tube, and the two ends of described first switching tube also the first electric capacity in parallel, two ends also second electric capacity in parallel of described 3rd switching tube;
Described second comprises second switch Guan Yu tetra-switching tube, and described second switch pipe is connected with described 4th switching tube;
Link between described first switching tube and described second switch pipe is described first incoming end;
Link between described 3rd switching tube and described 4th switching tube is described second incoming end;
Link between described first switching tube and described 3rd switching tube is described 3rd incoming end;
Described auxiliary circuit comprises the 3rd electric capacity, the 4th electric capacity, auxiliary induction circle, wherein, connect with one end of described 4th electric capacity in one end of described 3rd electric capacity, the other end of described 3rd electric capacity is described first link, and the other end of described 4th electric capacity is described second link;
One end of described auxiliary induction circle connects the line between described 3rd electric capacity and described 4th electric capacity, and the other end of described auxiliary induction circle is described 3rd link.
Preferably, described first switching tube, described second switch pipe, described 3rd switching tube and described 4th switching tube are insulated gate bipolar transistor;
Wherein, the emitter of described first switching tube is connected with the collector electrode of described 3rd switching tube, and the emitter of described second switch pipe is connected with the collector electrode of described 4th switching tube;
Link between the collector electrode of described first switching tube and the collector electrode of described second switch pipe is described first incoming end;
Link between the emitter of described 3rd switching tube and the emitter of described 4th switching tube is described second incoming end;
Link between the emitter of described first switching tube and the collector electrode of described 3rd switching tube is described 3rd incoming end.
Preferably, described 3rd electric capacity and described 4th electric capacity are electrochemical capacitor, and wherein, the negative electricity level of described 3rd electric capacity is connected with the positive electrode of described 4th electric capacity, very described first link of positive electricity of described 3rd electric capacity, the negative electricity level of described 4th electric capacity is described second link.
Preferably, described auxiliary circuit also comprises auxiliary switch, and described auxiliary switch is connected with described auxiliary induction circle;
Wherein, described auxiliary switch is arranged between described 3rd link and described 3rd incoming end; Or,
Described auxiliary switch is arranged between described auxiliary induction circle and the link between described 3rd electric capacity and described 4th electric capacity.
Preferably, described 3rd electric capacity is identical with the capacitance of described 4th electric capacity.
The embodiment of the present application additionally provides a kind of full-bridge converter on the other hand, comprises foregoing circuit.
The one or more technical schemes provided in the embodiment of the present application, at least have following technique effect or advantage:
Technical scheme in the embodiment of the present application is by increasing auxiliary circuit, provide an auxiliary current, the sense of current of this auxiliary current keeps identical with the loop current direction in rectification circuit, namely when loop current flows into node a, this auxiliary current also flows into node a, contrary, when loop current flows out node a, auxiliary current also flows out node a, this auxiliary current can play humidification to loop current, in Dead Time, jointly discharge and recharge is carried out to the electric capacity in rectification circuit, solve when loop current is less thus, capacitor discharge in rectification circuit is incomplete, technical problem easily impaired in system work process.
The embodiment of the present application at least also has following technique effect or advantage:
Further, in the embodiment of the present application technical scheme, described 3rd electric capacity and described 4th electric capacity are electrochemical capacitor, because the capacitance of electrochemical capacitor unit volume is larger, therefore its specified range of capacity is also larger, can be applied in the circuit of larger voltage range, and electrochemical capacitor is with low cost, therefore can preferably as the 3rd electric capacity in the embodiment of the present application and the 4th electric capacity, make the technical scheme in the embodiment of the present application can the applied widely and technique effect that application cost is cheap of realizing circuit.
Further, described first switching tube in the embodiment of the present application technical scheme, described second switch pipe, described 3rd switching tube and described 4th switching tube are insulated gate bipolar transistor, because insulated gate bipolar transistor has higher withstand voltage and lower conduction loss, therefore, under the technical scheme in the embodiment of the present application can also be applied in high voltage and high-power environment.
Further, described 3rd electric capacity in the embodiment of the present application technical scheme and described 4th electric capacity are electrochemical capacitor, because the capacitance of electrochemical capacitor unit volume is larger, therefore its specified range of capacity is also larger, can to be applied in the circuit of larger voltage range and electrochemical capacitor with low cost, therefore, the technical scheme in the embodiment of the present application can realize being suitable for the wide and technique effect that application cost is cheap of voltage range.
Further, technical scheme in the embodiment of the present application is by the mode of an auxiliary switch of connecting in auxiliary induction circle La side, then this auxiliary switch is closed on the one hand when the loop current in rectification circuit is less than a predetermined threshold, auxiliary circuit unit is accessed this rectification circuit, this auxiliary switch is then disconnected on the other hand when the loop current in rectification circuit is adjusted to and is greater than predetermined threshold, auxiliary circuit unit and rectification circuit are cut off, plays the technique effect of the applicability of technical scheme when loop current is different promoted in the embodiment of the present application thus.
Accompanying drawing explanation
Fig. 1 is the full-bridge converter circuit diagram of a use IGBT;
The structure chart of a kind of circuit that Fig. 2 provides for the embodiment of the present invention;
The circuit diagram of a kind of circuit that Fig. 3 provides for the embodiment of the present invention.
Embodiment
The application provides a kind of full-bridge converter, also exist when when loop current is little in order to solve full-bridge converter of the prior art, electric charge on the electric capacity that leading-bridge Switch Controller should be arranged cuts off in conversion at switch conduction and can not be taken out completely to the greatest extent, thus the technical problem causing described electric capacity easily impaired in system work process.
Technical scheme in the embodiment of the present application is for solving the problems of the technologies described above, and general thought is as follows:
A kind of circuit, described circuit comprises: auxiliary circuit and rectification circuit, and described rectification circuit is in order to being ac output current by the rectification of direct current input current;
Described auxiliary circuit comprises the first link, the second link and the 3rd link, and described rectification circuit comprises: the first incoming end, the second incoming end, the 3rd incoming end;
Described first link connects positive source, and described first link connects the first incoming end of described rectification circuit;
Described second link connects power cathode, and described second link connects described rectification circuit second incoming end;
3rd link of described auxiliary circuit connects the 3rd incoming end in described rectification circuit;
Wherein, described auxiliary circuit in order to provide an auxiliary current at predetermined time to described rectification circuit, to increase the loop current in described rectification circuit.
Technical scheme in the embodiment of the present application is by increasing auxiliary circuit, provide an auxiliary current, the sense of current of this auxiliary current keeps identical with the loop current direction in rectification circuit, namely when loop current flows into node a, this auxiliary current also flows into node a, contrary, when loop current flows out node a, auxiliary current also flows out node a, this auxiliary current can play humidification to loop current, in Dead Time, jointly discharge and recharge is carried out to the electric capacity in rectification circuit, solve when loop current is less thus, capacitor charge and discharge in rectification circuit is incomplete, technical problem easily impaired in system work process.
Below by accompanying drawing and specific embodiment, technical scheme is described in detail, the specific features being to be understood that in the embodiment of the present application and embodiment is the detailed description to technical scheme, instead of the restriction to technical scheme, when not conflicting, the technical characteristic in the embodiment of the present application and embodiment can combine mutually.
Be illustrated in figure 2 the structure chart of a kind of circuit of the embodiment of the present application, the embodiment of the present application specifically provides a kind of circuit, and described circuit comprises: auxiliary circuit and rectification circuit, and described rectification circuit is in order to being ac output current by the rectification of direct current input current;
Described auxiliary circuit comprises the first link A1, the second link B1 and the 3rd link C1, and described rectification circuit comprises: the first incoming end A2, the second incoming end B2, the 3rd incoming end C2; Described first link A1 connects power supply Vs positive pole, and described first link A1 connects the first incoming end A2 of described rectification circuit; Described second link B1 connects power supply Vs negative pole, and described second link B1 connects described rectification circuit second incoming end B2; 3rd link C1 of described auxiliary circuit connects the 3rd incoming end C2 in described rectification circuit; Wherein, described auxiliary circuit in order to provide an auxiliary current at predetermined time to described rectification circuit, to increase the loop current in described rectification circuit.
Because auxiliary circuit provides an auxiliary current, the sense of current of this auxiliary current keeps identical with the loop current direction in rectification circuit, namely when loop current flows into node a, this auxiliary current also flows into node a, contrary, when loop current flows out node a, auxiliary current also flows out node a, this auxiliary current can play humidification to loop current, in Dead Time, jointly discharge and recharge is carried out to the electric capacity in rectification circuit, solve when loop current is less thus, capacitor discharge in rectification circuit is incomplete, technical problem easily impaired in system work process.
Be illustrated in figure 3 the circuit diagram of a kind of circuit of the embodiment of the present application, particularly, described rectification circuit comprises the first lateral circuit and the second lateral circuit, described first lateral circuit comprise first with second, and described first with described second in parallel;
Described first comprises the first switching tube S1 and the 3rd switching tube S3, the output of described first switching tube S1 is connected with the input of described 3rd switching tube S3, and be also parallel with the first electric capacity C1 between the two ends of described first switching tube S1, be also parallel with the second electric capacity C3 between the two ends of described 3rd switching tube S3;
Described second comprises second switch pipe S2 and the 4th switching tube S4, and the output of described second switch pipe S2 is connected with the input of described 4th switching tube S4; Link between the input of described first switching tube S1 and the input of described second switch pipe S2 is described first incoming end;
Link between the output of described 3rd switching tube S3 and the output of described 4th switching tube S4 is described second incoming end;
Link between the output of described first switching tube S1 and the input of described 3rd switching tube S3 is described 3rd incoming end;
Described auxiliary circuit comprises the 3rd electric capacity Ca1, the 4th electric capacity Ca2, auxiliary induction circle La, wherein, connect with one end of described 4th electric capacity Ca2 in one end of described 3rd electric capacity Ca1, the other end of described 3rd electric capacity Ca1 is described first link, and the other end of described 4th electric capacity Ca2 is described second link;
One end of described auxiliary induction circle connects the line between described 3rd electric capacity Ca1 and described 4th electric capacity Ca2, and the other end of described auxiliary induction circle La is described 3rd link.
Described first switching tube S1 and described 3rd switching tube S3 forms leading-bridge switching tube, and described second switch pipe S2 and described 4th switching tube S4 forms lagging leg switching tube.
When the technical scheme in the application is middle in working order, for advanced arm switch pipe S3, from S3 turns off, owing to there is control gap, in a Dead Time, S2 is still opening state and S1, S3 and S4 is off state, now form the first electric capacity C1 to discharge and the state of the second electric capacity C3 and the 4th electric capacity Ca2 charging, auxiliary current Ia and loop current Ip flows into jointly (electric charge outflow) a point, be first electric capacity C1 discharge and be that the second electric capacity C3 and the 4th electric capacity Ca2 charge, under the acting in conjunction of auxiliary current Ia and loop current Ip, ensure in Dead Time, make the electric charge release on the first electric capacity C1 complete.After Dead Time, the charge discharge at the first electric capacity C1 two ends is complete, the anti-paralleled diode conducting of the first switching tube S1, and the no-voltage realizing the first switching tube S1 opens function.
Open and the 3rd switching tube S3 off period at the first switching tube S1, because the 4th switching tube S4 is also open-minded, therefore auxiliary current Ia becomes positive direction from negative direction gradually, is detached by the electric charge on the 4th electric capacity Ca2.
In Dead Time before the 3rd switching tube S3 opens, first first switching tube S1 turns off, now the 4th switching tube S4 is conducting state and second switch pipe S2 and the 3rd switching tube S3 is off state, now form the second electric capacity C3 to discharge and the state of the first electric capacity C1 and the 3rd electric capacity Ca1 charging, auxiliary induction circle La is formed the auxiliary current Ia with loop current Ip equidirectional, and auxiliary current Ia and loop current Ip flows out (electric charge inflow) a point jointly, be second electric capacity C3 discharge and be that the first electric capacity C1 and the 3rd electric capacity Ca1 charge, under the acting in conjunction of auxiliary current Ia and loop current Ip, ensure in Dead Time, make the electric charge release on the second electric capacity C3 complete.After Dead Time, the second electric capacity C3 discharge off, the anti-paralleled diode conducting of the 3rd switching tube S3, the no-voltage realizing the 3rd switching tube S3 opens function.
Open and the first switching tube S1 off period at the 3rd switching tube S3, because second switch pipe S2 is also open-minded, therefore auxiliary current Ia becomes negative direction from positive direction gradually, is detached by the electric charge on the 3rd electric capacity Ca1.
So far, a work period of auxiliary circuit terminates.
Visible, technical scheme in the embodiment of the present application is by increasing auxiliary circuit, provide an auxiliary current Ia, the sense of current of this auxiliary current Ia keeps identical with the sense of current of the loop current Ip in rectification circuit, namely when loop current Ip flows into node a, auxiliary current Ia also flows into node a, contrary, when loop current Ip flows out node a, auxiliary current Ia also flows out node a, this auxiliary current Ia can play humidification to loop current Ip, in Dead Time, jointly discharge and recharge is carried out to the electric capacity arranged corresponding on leading-bridge switching tube, the electric charge at the electric capacity two ends arranged corresponding on leading-bridge switching tube is taken out to the greatest extent completely, solve when loop current is less thus, in rectification circuit, on leading-bridge switching tube, the corresponding capacitor discharge arranged is incomplete, thus the technical problem causing described electric capacity easily impaired in system work process, expand the scope of application that leading-bridge switching tube S1 and S3 realizes zero voltage switch.
Particularly, described first switching tube, described second switch pipe, described 3rd switching tube and described 4th switching tube are insulated gate bipolar transistor; Wherein, the emitter of described first switching tube is connected with the collector electrode of described 3rd switching tube, and the emitter of described second switch pipe is connected with the collector electrode of described 4th switching tube; Link between the collector electrode of described first switching tube and the collector electrode of described second switch pipe is described first incoming end; Link between the emitter of described 3rd switching tube and the emitter of described 4th switching tube is described second incoming end; Link between the emitter of described first switching tube and the collector electrode of described 3rd switching tube is described 3rd incoming end.
Because insulated gate bipolar transistor has higher withstand voltage and lower conduction loss, therefore, under the technical scheme in the embodiment of the present application can also be applied in high voltage and high-power environment.
Particularly, described 3rd electric capacity and described 4th electric capacity are electrochemical capacitor, and wherein, the negative electricity level of described 3rd electric capacity is connected with the positive electrode of described 4th electric capacity, very described first link of positive electricity of described 3rd electric capacity, the negative electricity level of described 4th electric capacity is described second link.
Because the capacitance of electrochemical capacitor unit volume is larger, therefore its specified range of capacity is also larger, be generally 1 ~ 1000 μ F, rated operational voltage scope is 6.3 ~ 450V, can be applied in the circuit of larger voltage range, and electrochemical capacitor is with low cost, therefore can preferably as the 3rd electric capacity Ca1 in the embodiment of the present application and the 4th electric capacity Ca2, make the technical scheme in the embodiment of the present application can realize being suitable for the wide and technique effect that application cost is cheap of voltage range.
Particularly, described auxiliary circuit also comprises auxiliary switch, and described auxiliary switch is connected with described auxiliary induction circle La; Wherein, described auxiliary switch is arranged between described 3rd link and described 3rd incoming end; Or described auxiliary switch is arranged between the link between one end of described auxiliary induction circle La and described 3rd electric capacity Ca1 and described 4th electric capacity Ca2.
Technical scheme in the embodiment of the present application is applicable in the little environment of loop current, when circuit environment change to loop current be greater than the situation of predetermined threshold time, if described auxiliary circuit unit still in running order middle time; could shunt circuit resource, and then whole circuit is impacted.
Therefore, technical scheme in the embodiment of the present application is by the mode of an auxiliary switch of connecting in auxiliary induction circle La side, then this auxiliary switch is closed on the one hand when the loop current in rectification circuit is less than a predetermined threshold, auxiliary circuit unit is accessed this rectification circuit, this auxiliary switch is then disconnected on the other hand when the loop current in rectification circuit is adjusted to and is greater than predetermined threshold, auxiliary circuit unit and rectification circuit are cut off, plays the technique effect of the applicability of technical scheme when loop current is different promoted in the embodiment of the present application thus.
Particularly, described 3rd electric capacity is identical with the capacitance of described 4th electric capacity.
Electric capacity its cost different due to capacity is also different, and because the circuit environment in the embodiment of the present application technical scheme has symmetry, the three electric capacity Ca1 different according to capacity and the 4th electric capacity Ca2, capacitance then can be caused to waste and improve the problem of application cost, therefore, technical scheme in the embodiment of the present application adopts the 3rd electric capacity Ca1 and the 4th electric capacity Ca2 that capacitance is identical, can also realize the technique effect saving electric capacity resource.
On the other hand, additionally provide a kind of full-bridge converter in the embodiment of the present application, this full-bridge converter comprises circuit as above.
Technical scheme in the embodiment of the present application is by increasing auxiliary circuit, provide an auxiliary current, the sense of current of this auxiliary current keeps identical with the loop current direction in rectification circuit, namely when loop current flows into node a, this auxiliary current also flows into node a, contrary, when loop current flows out node a, auxiliary current also flows out node a, this auxiliary current can play humidification to loop current, in Dead Time, jointly discharge and recharge is carried out to the electric capacity in rectification circuit, solve when loop current is less thus, capacitor discharge in rectification circuit is incomplete, technical problem easily impaired in system work process.
Further, in the embodiment of the present application technical scheme, described 3rd electric capacity and described 4th electric capacity are electrochemical capacitor, because the capacitance of electrochemical capacitor unit volume is larger, therefore its specified range of capacity is also larger, can be applied in the circuit of larger voltage range, and electrochemical capacitor is with low cost, therefore can preferably as the 3rd electric capacity in the embodiment of the present application and the 4th electric capacity, make the technical scheme in the embodiment of the present application can the applied widely and technique effect that application cost is cheap of realizing circuit.
Further, described first switching tube in the embodiment of the present application technical scheme, described second switch pipe, described 3rd switching tube and described 4th switching tube are insulated gate bipolar transistor, because insulated gate bipolar transistor has higher withstand voltage and lower conduction loss, therefore, under the technical scheme in the embodiment of the present application can also be applied in high voltage and high-power environment.
Further, described 3rd electric capacity in the embodiment of the present application technical scheme and described 4th electric capacity are electrochemical capacitor, because the capacitance of electrochemical capacitor unit volume is larger, therefore its specified range of capacity is also larger, can to be applied in the circuit of larger voltage range and electrochemical capacitor with low cost, therefore, the technical scheme in the embodiment of the present application can realize being suitable for the wide and technique effect that application cost is cheap of voltage range.
Further, technical scheme in the embodiment of the present application is by the mode of an auxiliary switch of connecting in auxiliary induction circle La side, then this auxiliary switch is closed on the one hand when the loop current in rectification circuit is less than a predetermined threshold, auxiliary circuit unit is accessed this rectification circuit, this auxiliary switch is then disconnected on the other hand when the loop current in rectification circuit is adjusted to and is greater than predetermined threshold, auxiliary circuit unit and rectification circuit are cut off, plays the technique effect of the applicability of technical scheme when loop current is different promoted in the embodiment of the present application thus.
Although described the preferred embodiment of the application, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the application's scope.
Obviously, those skilled in the art can carry out various change and modification to the application and not depart from the spirit and scope of the application.Like this, if these amendments of the application and modification belong within the scope of the application's claim and equivalent technologies thereof, then the application is also intended to comprise these change and modification.
Claims (7)
1. a circuit, described circuit comprises: auxiliary circuit and rectification circuit, and described rectification circuit is in order to being ac output current by the rectification of direct current input current;
Described auxiliary circuit comprises the first link, the second link and the 3rd link, and described rectification circuit comprises: the first incoming end, the second incoming end, the 3rd incoming end;
Described first link connects positive source, and described first link connects the first incoming end of described rectification circuit;
Described second link connects power cathode, and described second link connects described rectification circuit second incoming end;
3rd link of described auxiliary circuit connects the 3rd incoming end in described rectification circuit;
Wherein, described auxiliary circuit in order to provide an auxiliary current at predetermined time to described rectification circuit, to increase the loop current in described rectification circuit.
2. circuit as claimed in claim 1, it is characterized in that, described rectification circuit comprises the first lateral circuit and the second lateral circuit, described first lateral circuit comprise first with second, and described first with described second in parallel;
Described first comprises the first switching tube and the 3rd switching tube, and described first switching tube is connected with described 3rd switching tube, and the two ends of described first switching tube also the first electric capacity in parallel, two ends also second electric capacity in parallel of described 3rd switching tube;
Described second comprises second switch Guan Yu tetra-switching tube, and described second switch pipe is connected with described 4th switching tube;
Link between described first switching tube and described second switch pipe is described first incoming end;
Link between described 3rd switching tube and described 4th switching tube is described second incoming end;
Link between described first switching tube and described 3rd switching tube is described 3rd incoming end;
Described auxiliary circuit comprises the 3rd electric capacity, the 4th electric capacity, auxiliary induction circle, wherein, connect with one end of described 4th electric capacity in one end of described 3rd electric capacity, the other end of described 3rd electric capacity is described first link, and the other end of described 4th electric capacity is described second link;
One end of described auxiliary induction circle connects the line between described 3rd electric capacity and described 4th electric capacity, and the other end of described auxiliary induction circle is described 3rd link.
3. circuit as claimed in claim 2, it is characterized in that, described first switching tube, described second switch pipe, described 3rd switching tube and described 4th switching tube are insulated gate bipolar transistor;
Wherein, the emitter of described first switching tube is connected with the collector electrode of described 3rd switching tube, and the emitter of described second switch pipe is connected with the collector electrode of described 4th switching tube;
Link between the collector electrode of described first switching tube and the collector electrode of described second switch pipe is described first incoming end;
Link between the emitter of described 3rd switching tube and the emitter of described 4th switching tube is described second incoming end;
Link between the emitter of described first switching tube and the collector electrode of described 3rd switching tube is described 3rd incoming end.
4. circuit as claimed in claim 2, it is characterized in that, described 3rd electric capacity and described 4th electric capacity are electrochemical capacitor, wherein, the negative electricity level of described 3rd electric capacity is connected with the positive electrode of described 4th electric capacity, very described first link of positive electricity of described 3rd electric capacity, the negative electricity level of described 4th electric capacity is described second link.
5. the circuit as described in as arbitrary in claim 2-4, it is characterized in that, described auxiliary circuit also comprises auxiliary switch, and described auxiliary switch is connected with described auxiliary induction circle;
Wherein, described auxiliary switch is arranged between described 3rd link and described 3rd incoming end; Or,
Described auxiliary switch is arranged between described auxiliary induction circle and the link between described 3rd electric capacity and described 4th electric capacity.
6. the circuit as described in claim 2-4, is characterized in that, described 3rd electric capacity is identical with the capacitance of described 4th electric capacity.
7. a full-bridge converter, is characterized in that, comprises circuit as claimed in claim 1.
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| CN201410475244.5A CN105490543A (en) | 2014-09-17 | 2014-09-17 | Circuit and full-bridge converter |
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| CN201410475244.5A CN105490543A (en) | 2014-09-17 | 2014-09-17 | Circuit and full-bridge converter |
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| CN101075784A (en) * | 2007-06-21 | 2007-11-21 | 艾默生网络能源有限公司 | Zero-voltage DC/DC switch circuit with phase-shift control |
| CN101340151A (en) * | 2007-07-03 | 2009-01-07 | 株式会社大亨 | Power source and arc component processing power source |
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Application publication date: 20160413 |