CN1355592A - Integrated multifunctional DC converter - Google Patents
Integrated multifunctional DC converter Download PDFInfo
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- CN1355592A CN1355592A CN 00134740 CN00134740A CN1355592A CN 1355592 A CN1355592 A CN 1355592A CN 00134740 CN00134740 CN 00134740 CN 00134740 A CN00134740 A CN 00134740A CN 1355592 A CN1355592 A CN 1355592A
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Abstract
An integrated multifunctional DC converter is composed of input capacitor, DC-AC converter, transformer, rectifier circuit (full bridge composed of 4 rectifying diodes), filter capacitor, and output voltage changer over switch connected between the co-anode of rectifying diodes, central tap of transformer and filter capacitor.
Description
The present invention relates to a kind of device of realizing direct current energy to conversion between the direct current energy, relate in particular to a kind of integrated multifunctional DC converter.
Fig. 1 is the soft switch DC of the existing a kind of full-bridge phase shifting formula circuit structure diagram of rheology parallel operation always.The direct voltage of input capacitor C11 becomes the high frequency square wave alternating voltage to deliver to transformer Tr through switching device S11～S14 switch change-over, the outlet side of transformer Tr is exported the square wave alternating-current voltage of two groups of identical amplitudes, reaches the filter circuit filtering of being made up of inductor Lo and capacitor C3 through rectifier diode D11, D12 rectification and obtains output dc voltage.In the converter of this structure, each comfortable 50% duty ratio square-wave signal control complementary switch work down of upper and lower two switching device S11 of first brachium pontis and upper and lower two switching device S13 of the S12 and second brachium pontis and S14.And being the phase difference of the control signal of the control signal by changing first brachium pontis and second brachium pontis, the adjusting of output voltage reaches, and utilize the energy storage among the equivalent inductance Lk in the transformer Tr input loop to realize the soft open-minded of switching device S11～S14, to improve the operating efficiency of converter.
Fig. 2 is the circuit structure diagram of existing a kind of asymmetrical half-bridge DC-DC converter.Direct voltage on the input capacitor C21 is up and down two switching device S21 and the work of S22 complementary switch in brachium pontis, output high frequency square wave alternating current, this output makes the input side of transformer Tr obtain square wave alternating-current voltage through block capacitor Cb filtering direct current part.Circuit of transformer Tr outlet side (comprising the filter circuit that rectifier diode D21, D22 and inductor Lo and capacitor C3 form) and operation principle and Fig. 1 prior art are similar.The square-wave pulse time of the control signal by changing switching device S21 or S22 in Fig. 2 prior art changes output end voltage, and utilize that the energy storage of the equivalent inductance Lk in transformer Tr input loop realizes switching device S21 and S22 softly open work.
Fig. 3 is the circuit structure diagram of existing a kind of full bridge structure series parallel resonance DC-DC converter.Direct voltage on the input capacitor C31 is transformed into square wave alternating-current voltage through switching device S31～S34.The series resonant tank that constitutes via series resonance inductor Ls and series resonance capacitor Cs and constitute shunt-resonant circuit resonance by the input magnetizing inductance of parallel resonance capacitor Cp and transformer Tr and obtain the input terminal voltage of sinusoidal voltage again as transformer Tr.Circuit of the output of transformer Tr (comprising the filter circuit that rectifier diode D31, D32 and inductor Lo and capacitor C3 form) and operation principle and Fig. 1 are similar.Thereby the adjusting of output voltage is to change transformer Tr input terminal voltage by the switch operating frequency that changes switching device S31～S34 to realize among Fig. 3.
Existing DC-DC converter is applicable to that all input direct voltage and output dc voltage all change the smaller applications occasion relatively among Fig. 1 to Fig. 3.And the service behaviour of converter and conversion efficiency are along with the rising of the reduction of output voltage and input voltage and descend.Therefore, when practical application related to different input voltages or output voltage condition, existing converter must carry out special design at obstructed service condition and just can reach.
Therefore, the object of the present invention is to provide a kind of integrated multifunctional DC converter with multiple input and output voltage mapping function, thereby realize the multifunction and the dexterityization of DC converter, reach and reduce the product variety specification, optimize product quality and further reduce product cost.
For example, in the communications field, DC converter commonly used has the DC converting of 48V to the DC converting of 24V and 24V to 48V.Be to realize corresponding mapping function respectively at present by two kinds of different converting means.The objective of the invention is to realize that a kind of new converting means can be directly used in above-mentioned two kinds of application scenarios.
Therefore, according to above-mentioned purpose of the present invention, the invention provides a kind of integrated multifunctional DC converter, it comprises:
Input capacitor is used to provide direct voltage;
The DC-AC translation circuit links to each other with described input capacitor, and the direct voltage that described input capacitor is provided converts high-frequency ac voltage to;
The switching device control-signals generator is used to produce control signal, controls the turn-on and turn-off of each switching device in the full-bridge switch set of devices of described DC-AC translation circuit;
Transformer links to each other with described DC-AC translation circuit, and described high-frequency ac voltage is carried out electrical isolation and transformation;
Rectification circuit links to each other with described transformer output, and the high-frequency ac voltage through transformation that described transformer is exported is rectified into direct voltage; And
Filtering capacitor links to each other with described rectification circuit;
The invention is characterized in, also comprise an output voltage change over switch, described rectification circuit is that the rectifier diode of four full bridge structures constitutes, one end of described output voltage change over switch is connected on the common anode tie point of full-bridge rectification diode, the other end is connected on the centre cap of described transformer, and the transfer point of described output voltage change over switch links to each other with described filtering capacitor.
Describe preferred embodiment of the present invention in detail below in conjunction with accompanying drawing, above and other objects of the present invention, advantage and effect will become more clear by following description.In the accompanying drawing:
Fig. 1-Fig. 3 shows three kinds of structures of the DC converter of prior art;
Fig. 4 shows the circuit structure diagram of integrated multifunctional DC converter of the present invention;
Fig. 5 is used to explain the operation principle of DC converter shown in Figure 4;
Fig. 6 shows the another kind of circuit structure diagram of integrated multifunctional DC converter of the present invention;
Fig. 7 is used to explain the operation principle of DC converter shown in Figure 6;
Fig. 8 shows another circuit structure diagram of multi-functional integration open form DC converter of the present invention.
As shown in Figure 4, the resonant circuit be made up of input capacitor C1, full-bridge switch set of devices S1-S4, resonant capacitor Cs and series resonance inductor Ls of integrated multifunctional DC converter of the present invention, transformer Tr, the output rectification circuit and the filtering capacitor C3 that are made of rectifier diode D1-D4 form.Input capacitor C1 is connected with full-bridge switch set of devices S1-S4, and full-bridge switch set of devices S1-S4 is the same with full-bridge switch set of devices in traditional DC converter, alternate conduction and shutoff.Thereby will convert high-frequency ac voltage to from the direct voltage that input capacitor C1 obtains.Full-bridge switch set of devices S1-S4 is connected with the capacitor Cs resonant circuit that series connection constitutes with inductor Ls, constitutes the DC-AC translation circuit.Wherein series resonance inductor Ls can be incorporated among the transformer Tr.
Transformer Tr carries out electrical isolation and transformation with the alternating voltage of DC-AC translation circuit output, and the ratio of transformation can be decided as required.The output rectification circuit that links to each other with the output of transformer Tr is made of with the full-bridge form four rectifier diode D1-D4.Sm among Fig. 4 is the output voltage change over switch, and the end of this change over switch Sm is connected on the centre cap of transformer Tr, and the other end is connected on the common anode tie point of full-bridge rectification diode.The transfer point of change over switch Sm links to each other with filtering capacitor C3.And the common cathode tie point of full-bridge rectification diode is connected to the other end of filtering capacitor C3.
The operation principle of this full bridge rectifier is as follows: the upper and lower switching device S1 of first brachium pontis of full-bridge switch set of devices and S2 suspension control signal separately control and complementary turn-on and turn-off.The upper and lower switching device S3 of second brachium pontis and S4 also are subjected to corresponding signal control and complementary turn-on and turn-off (turn-on and turn-off of control switch set of devices about how all are known technologies, therefore, are not described in detail at this).The direct voltage of input capacitor C1 is through switching device S1～S4 conversion, between the mid point B1 of the mid point A1 of full-bridge switch set of devices first brachium pontis and second brachium pontis, obtain the high frequency square wave alternating voltage, this high frequency square wave alternating voltage is applied to by series resonance capacitor Cs, the series resonant tank that the input side winding of transformer Tr and series resonance inductor Ls constitute produces series resonance and obtain the sine wave AC electric current in the input side winding of transformer Tr.The sine wave alternating current transformer Tr that flows through is sent in upper and lower two windings of transformer outlet side.According to the residing position of output change-over switch Sm, electric current on the transformer outlet side can pass through rectifier diode element D1 and D2 (when output change-over switch Sm is in the A position) or D1～D4 (when output conversion beginning Sm is in the B position) and be sent on the output capacitor C3, obtains corresponding VD after capacitor C3 filtering.When change over switch Sm is connected to the A point (as Fig. 5 A), output dc voltage is that the voltage on upper and lower two identical windings of transformer Tr outlet side obtains through rectifier diode D1 and D2 rectification respectively.Therefore amplitude of output voltage is corresponding to the voltage amplitude of upper and lower two windings of transformer Tr outlet side.When change over switch is connected to the B point (shown in Fig. 5 B), output dc voltage is that upper and lower two identical windings in series stack of transformer Tr outlet side is after obtain after over commutation diode D1, D4 and D2, the D3 rectification.Therefore this moment, amplitude of output voltage was corresponding to the voltage sum on upper and lower two windings of transformer Tr outlet side.Therefore output dc voltage was change over switch Sm half of output dc voltage when being connected to the B point when change over switch Sm was connected to the A point.Output dc voltage when in other words, change over switch Sm is connected to the B point is the twice of change over switch Sm when being connected to the A point.Therefore, can obtain two kinds of different VD (as 24V and the 48V direct voltage of in communication power supply, using usually) by the link position that changes change over switch Sm and can obviously not influence the service behaviour of circuit.
In the embodiment of Fig. 4, the DC-AC translation circuit has adopted the full-bridge switch set of devices.This translation circuit should be appreciated that and also can adopt for example various types of DC-AC translation circuits such as half-bridge switch set of devices, normal shock switching device group, push-pull type switching device group, as long as can play direct current to the change action that exchanges.
Embodiment shown in Figure 4 is the function that reaches the conversion output voltage by the circuit structure of the output of conversion DC converter.Fig. 6 shows an alternative embodiment of the invention of knowing clearly.In this embodiment, be the function that reaches the conversion input voltage by the circuit structure of importation of conversion DC converter.
As shown in Figure 6, from the circuit structure of DC converter shown in Figure 6, it is identical with the structure of traditional DC converter shown in Figure 1.The two distinctive points is, control signal (control method) difference of control full-bridge switch set of devices.Traditional DC converter to the control mode of this full-bridge switch set of devices is: make two switching device alternate conduction and shutoff on two switching devices on first brachium pontis and second brachium pontis, promptly, make switching device S11 and the complementary turn-on and turn-off of S12 on first brachium pontis, make switching device S13 and the complementary turn-on and turn-off of S14 on second brachium pontis.The control method of DC converter of the present invention has increased a kind of on this basis again, promptly, make two switching device S1 and S2 complementation (replacing) turn-on and turn-off on first brachium pontis of full-bridge switch set of devices, and make fixing shutoff of last switching device S3 on second brachium pontis of full-bridge switch set of devices, make the fixedly conducting of following switching device S4 on second brachium pontis of full-bridge switch set of devices.That is to say that the full-bridge switch set of devices of DC converter of the present invention has two kinds of operating states, a kind of operating state is with traditional the same, and another kind of operating state is that the present invention has increased operating state newly.
Under first kind of state, under promptly traditional operating state, the last switch S 3 complementary turn-on and turn-off of the following switch S 2 of the last switch S 1 of first brachium pontis of full-bridge switch set of devices and the following switch S 4 of second brachium pontis and first brachium pontis and second brachium pontis.Output voltage is a square wave alternating-current voltage between the central point A1 of first brachium pontis and the central point B1 of second brachium pontis.The amplitude of this square wave alternating-current voltage equates with the input direct voltage amplitude of input capacitor C1.If under nominal working conditions, series resonance capacitor Cs and series resonance inductor Ls are designed in and work under the complete resonance condition, and then the voltage of transformer Tr input side equals the voltage between an A1 and the B1, and voltage amplitude equals the input direct voltage amplitude.
When the full-bridge switch set of devices of DC converter of the present invention is operated in another kind of state, be two switching device S1 and S2 complementation (replacing) turn-on and turn-off on first brachium pontis of full-bridge switch set of devices, turn-off and the last switching device S3 on second brachium pontis of full-bridge switch set of devices is fixing, following switching device S4 on second brachium pontis of full-bridge switch set of devices fixedly during conducting, can be drawn as circuit structure shown in Figure 7 to the circuit structure of Fig. 6.This time point A2 is the square wave pulse voltage that contains input direct voltage one half amplitude point DC component to output voltage between the B2, excludes DC component through series resonance capacitor Cs, and with the complete resonance of series resonance inductor Ls.The input side acquisition amplitude of transformer Tr is half a square-wave voltage of input direct voltage.That is to say, at the condition glance sideways of safeguarding identical output voltage, the output voltage condition glance sideways that this operating state can make converter of the present invention be operated in to double state shown in Figure 6.Thereby this circuit can adapt to two kinds of different input voltages, keeps output voltage constant.
Therefore, by changing the switch condition of work of the upper and lower switching device S3 of second brachium pontis, S4, DC converter is applicable to two kinds of different input DC condition, and the service behaviour of not obvious change circuit.
The same with traditional DC converter, the control signal of full-bridge switch set of devices is provided by the switching device control-signals generator.Control method according to full-bridge switch set of devices of the present invention described above, control-signals generator CT of the present invention can comprise two control-signals generator: first control-signals generator produces traditional control signal, makes two switching device alternate conduction and shutoff on two switching devices on first brachium pontis of full-bridge switch set of devices and second brachium pontis; Second control-signals generator produces another kind of control signal of the present invention, make two switching device alternate conduction and shutoff on first brachium pontis of full-bridge switch set of devices, and make fixing shutoff of last switching device on second brachium pontis of full-bridge switch set of devices, make the fixedly conducting of following switching device on second brachium pontis of full-bridge switch set of devices.These two control-signals generator are controlled them by change over switch (perhaps conversion equipment) and are worked respectively.
As mentioned above, embodiment shown in Figure 4 is the function that reaches translation circuit by the output circuit structure of conversion DC converter, and embodiment shown in Figure 6 is the function that reaches translation circuit by the input circuit structure of conversion DC converter.In a new embodiment, can combine the output circuit structure of Fig. 4 with input circuit structure shown in Figure 6, its concrete circuit structure as shown in Figure 8 can be with reference to the description of Fig. 4 and Fig. 6 for its operation principle.
Describe each preferred embodiment of the present invention above in detail.But should be appreciated that above-mentioned these are not limitation of the scope of the invention.For the those skilled in the art in present technique field, can under the situation that does not break away from spirit of the present invention, make many variations and modification.Therefore, scope of the present invention should be decided by appended claims.
Claims (3)
1, a kind of integrated multifunctional DC converter, it comprises:
Input capacitor is used to provide direct voltage;
The DC-AC translation circuit links to each other with described input capacitor, and the direct voltage that described input capacitor is provided converts high-frequency ac voltage to;
The switching device control-signals generator is used to produce control signal, controls the turn-on and turn-off of each switching device in the full-bridge switch set of devices of described DC-AC translation circuit;
Transformer links to each other with described DC-AC translation circuit, and described high-frequency ac voltage is carried out transformation;
Rectification circuit links to each other with described transformer output, and the high-frequency ac voltage through transformation that described transformer is exported is rectified into direct voltage; And
Filtering capacitor links to each other with described rectification circuit;
It is characterized in that, also comprise an output voltage change over switch, described rectification circuit is that the rectifier diode of four full bridge structures constitutes, one end of described output voltage change over switch is connected on the common anode tie point of full-bridge rectification diode, the other end is connected on the centre cap of described transformer, and the transfer point of described output voltage change over switch links to each other with described filtering capacitor.
2, integrated multifunctional DC converter as claimed in claim 1, it is characterized in that, described DC-AC translation circuit comprises the full-bridge switch set of devices, described switching device control-signals generator comprises first control-signals generator and second control-signals generator, the signal that described first control-signals generator produces makes two switching device alternate conduction and the shutoff on two switching devices on first brachium pontis of described full-bridge switch set of devices and second brachium pontis, the signal that described second control-signals generator produces makes two switching device alternate conduction and the shutoff on first brachium pontis of described full-bridge switch set of devices, make fixing shutoff of last switching device on second brachium pontis of described full-bridge switch set of devices, make the fixedly conducting of following switching device on second brachium pontis of described full-bridge switch set of devices, described first control-signals generator and described second control-signals generator are worked respectively by change over switch.
3, integrated multifunctional DC converter as claimed in claim 1, it is characterized in that, described DC-AC translation circuit comprises the full-bridge switch set of devices, described full-bridge switch set of devices has two kinds of operating states, two switching device alternate conduction on two switching devices on first brachium pontis that first kind of operating state is described full-bridge switch set of devices and second brachium pontis and shutoff; Two switching device alternate conduction on first brachium pontis that second kind of operating state is described full-bridge switch set of devices and shutoff, last switching device on second brachium pontis of described full-bridge switch set of devices is fixing to be turn-offed, fixedly conducting of following switching device on second brachium pontis of described full-bridge switch set of devices, two kinds of operating states of described full-bridge switch set of devices are changed by change over switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001347403A CN1141778C (en) | 2000-12-01 | 2000-12-01 | Integrated multifunctional DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001347403A CN1141778C (en) | 2000-12-01 | 2000-12-01 | Integrated multifunctional DC converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1355592A true CN1355592A (en) | 2002-06-26 |
| CN1141778C CN1141778C (en) | 2004-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001347403A Expired - Lifetime CN1141778C (en) | 2000-12-01 | 2000-12-01 | Integrated multifunctional DC converter |
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| CN (1) | CN1141778C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916584A (en) * | 2012-10-29 | 2013-02-06 | 华为技术有限公司 | Method and device for controlling current of converter and UPS (uninterruptible power supply) |
| CN103904901A (en) * | 2014-03-28 | 2014-07-02 | 成都芯通科技股份有限公司 | Phase-shift full-bridge converter circuit and control method |
| CN105356755A (en) * | 2015-11-05 | 2016-02-24 | 刘文明 | Variable turn ratio output DC-DC converter |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101534054B (en) * | 2009-04-14 | 2012-04-18 | 福州大学 | Single-isolation combination pressure increase and reduction type multi-input direct current converter |
-
2000
- 2000-12-01 CN CNB001347403A patent/CN1141778C/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916584A (en) * | 2012-10-29 | 2013-02-06 | 华为技术有限公司 | Method and device for controlling current of converter and UPS (uninterruptible power supply) |
| CN102916584B (en) * | 2012-10-29 | 2015-01-21 | 华为技术有限公司 | Method and device for controlling current of converter and UPS (uninterruptible power supply) |
| CN103904901A (en) * | 2014-03-28 | 2014-07-02 | 成都芯通科技股份有限公司 | Phase-shift full-bridge converter circuit and control method |
| CN103904901B (en) * | 2014-03-28 | 2017-07-28 | 成都芯通科技股份有限公司 | A kind of phase-shifting full-bridge translation circuit and control method |
| CN105356755A (en) * | 2015-11-05 | 2016-02-24 | 刘文明 | Variable turn ratio output DC-DC converter |
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| Publication number | Publication date |
|---|---|
| CN1141778C (en) | 2004-03-10 |
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Granted publication date: 20040310 |