CN101499724B - Controller applied for resonance type DC/DC converter - Google Patents
Controller applied for resonance type DC/DC converter Download PDFInfo
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- CN101499724B CN101499724B CN2008100071139A CN200810007113A CN101499724B CN 101499724 B CN101499724 B CN 101499724B CN 2008100071139 A CN2008100071139 A CN 2008100071139A CN 200810007113 A CN200810007113 A CN 200810007113A CN 101499724 B CN101499724 B CN 101499724B
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Abstract
The invention relates to a controller which is applied to a resonance-typed DC/DC converter and used for controlling the shifting switch of the resonance-typed DC/DC converter. The controller comprises a pulse width modulation control unit, a high-frequency and fixed-frequency signal generation unit and a logic synthesis unit; the pulse width modulation control unit detects the output voltage of the resonance-typed DC/DC converter so as to generate a pulse width modulation signal; the high-frequency and fixed-frequency signal generation unit generates a high-frequency and fixed-frequency signal; the logic synthesis unit synthesizes the pulse width modulation signal and the high-frequency and fixed-frequency signal so as to generate a driving signal used for driving all shifting switches; the pulse width modulation control unit also detects the resonance current of the resonance-typed DC/DC converter simultaneously, so as to generate a pulse width modulation signal. The controller combines a first high-frequency and fixed-frequency signal and a second high-frequency and fixed-frequency signal of the fixed frequency with the pulse width modulation signal of the fixed width so as to control all shifting switches, thus ensuring that the resonance-typed DC/DC converter is at the best working point under all load conditions, simplifying the controller structure, reducing the loss of the shifting switch and improving the shifting frequency of the shifting switch.
Description
Technical field
The present invention relates to a kind of controller, particularly relate to a kind of controller that is applied to resonance type DC/DC converter that makes the resonance type DC converter under all loading conditions, all be in best operating point.
Background technology
With the half-bridge converter is example, sees also Fig. 1, shown in Figure 2, and Fig. 1 is the schematic diagram of the major control technology of the existing resonance type DC converter of explanation, and Fig. 2 is the waveform schematic diagram of the existing switch controlling signal of explanation.Present existing semibridge system inductance inductance capacitance (LLC) resonance type DC converter 11, its major control technology is to control by a frequency modulation control device 12, the output voltage that this frequency modulation control device 12 detects semibridge system inductance inductance capacitance (LLC) resonance type DC converter 11 changes switch controlling signal, and (signal is a signal, below all be called signal) frequency, the waveform of switch controlling signal as shown in Figure 2 so that output voltage meets the requirements.
Yet, cause loss to increase because the frequency of switch controlling signal is that the scope of its variation departs from the best operating point of system too greatly easily along with power output or output voltage change; Moreover its intrinsic high frequency starting characteristic has also increased the complexity of control.
This shows that above-mentioned existing resonance type DC converter obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of controller that is applied to resonance type DC/DC converter of new structure, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Because the defective that above-mentioned existing resonance type DC converter exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of controller that is applied to resonance type DC/DC converter of new structure, can improve general existing application in the resonance type DC converter, make it have more practicality.Through constantly research, design, and, create the present invention who has practical value finally through after studying sample and improvement repeatedly.
Summary of the invention
The objective of the invention is to, overcome the defective that existing resonance type DC converter exists, and provide a kind of controller that is applied to resonance type DC/DC converter of new structure, technical problem to be solved provides a kind of controller that is applied to resonance type DC/DC converter that makes the resonance type DC converter all be in best operating point under all loading conditions, is very suitable for practicality.
The object of the invention to solve the technical problems is to adopt following technical scheme to realize.A kind of controller that is applied to resonance type DC/DC converter according to the present invention's proposition, in order to control the diverter switch of described resonance type DC/DC converter, this controller comprises: a pulse width modulation controlled unit, a high frequency frequency-fixed signal generation unit and a logic synthesis unit, wherein: this pulse width modulation controlled unit, be the output voltage that detects described resonance type DC/DC converter, to produce a pulse-width signal; This high frequency frequency-fixed signal generation unit produces a high frequency frequency-fixed signal with described pulse-width signal; This logic synthesis unit is in order to described pulse-width signal and described high frequency frequency-fixed signal is synthetic to produce the drive signal that drives each described diverter switch.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Preferably, the aforesaid controller that is applied to resonance type DC/DC converter, wherein said high frequency frequency-fixed signal generation unit are that the rising edge with described pulse-width signal is the synchronizing signal that produces described high frequency frequency-fixed signal.
Preferably, the aforesaid controller that is applied to resonance type DC/DC converter, wherein said pulse width modulation controlled unit more detects the resonance current of described resonance type DC converter, to produce described pulse-width signal.
Preferably, the pulse width modulation controlled unit also detects the resonance current of resonance type DC/DC converter simultaneously, to produce described pulse-width signal.
Preferably, the aforesaid controller that is applied to resonance type DC/DC converter, the frequency of wherein said pulse-width signal is less than the frequency of described high frequency frequency-fixed signal.
Preferably, the aforesaid controller that is applied to resonance type DC/DC converter, the frequency of wherein said pulse-width signal is about 1/10 times of frequency of described high frequency frequency-fixed signal.
Preferably, the aforesaid controller that is applied to resonance type DC/DC converter, the frequency of wherein said pulse-width signal is less than 1/10 times of the frequency of described high frequency frequency-fixed signal.
The present invention compared with prior art has tangible advantage and beneficial effect.By technique scheme, the controller that the present invention is applied to resonance type DC/DC converter has following advantage and beneficial effect at least: the present invention has guaranteed that in conjunction with fixed frequency, first, second high frequency frequency-fixed signal of Fixed width and each diverter switch that pulse-width signal is controlled resonance type DC/DC converter resonance type DC/DC converter all is in best operating point under all loading conditions; And in the structure of simplifying controller, also reduced the loss of diverter switch, and improved the switching frequency of diverter switch.
In sum, the invention provides a kind of controller that is applied to resonance type DC/DC converter that makes the resonance type DC converter under all loading conditions, all be in best operating point.The present invention has above-mentioned plurality of advantages and practical value, no matter it all has bigger improvement on product structure or function, obvious improvement is arranged technically, and produced handy and practical effect, and more existing resonance type DC converter has the outstanding effect of enhancement, thereby being suitable for practicality more, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the schematic diagram of the major control technology of the existing resonance type DC converter of explanation.
Fig. 2 is the waveform schematic diagram of the existing switch controlling signal of explanation.
Fig. 3 is the configuration diagram that explanation the present invention is applied to the controller preferred embodiment of resonance type DC/DC converter.
Fig. 4 is the schematic diagram of waveform of the majority signal of explanation the present invention controller preferred embodiment of being applied to resonance type DC/DC converter.
Embodiment
Reach technological means and the effect thereof that predetermined goal of the invention is taked in order further to set forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of the controller that is applied to resonance type DC/DC converter, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Relevant aforementioned and other technology contents, characteristics and effect of the present invention can be known to present in the following detailed description that cooperates with reference to graphic preferred embodiment.By the explanation of embodiment, when can being to reach technological means that predetermined purpose takes and effect to get one more deeply and concrete understanding to the present invention, yet appended graphic only provide with reference to the usefulness of explanation, be not to be used for the present invention is limited.
Seeing also shown in Figure 3ly, is that explanation the present invention is applied to the configuration diagram of the controller preferred embodiment of resonance type DC/DC converter.The controller that is applied to resonance type DC/DC converter 23 of preferred embodiment of the present invention, comprise a pulse width modulation controlled unit 31, a high frequency frequency-fixed signal generation unit 32 and a logic synthesis unit 33, its effect is two diverter switches 21,22 in order to control resonance type DC/DC converter 2, so that the output voltage V o of resonance type DC/DC converter 2 meets institute's requirement.
In the present embodiment, resonance type DC/DC converter 2, be to belong to half-bridge symmetry inductance inductance capacitance (LLC) type, its element is except two diverter switches 21,22, also comprise an electric capacity 23, resonant inductance 24, a transformer 25 and be positioned at two synchronous rectifiers 26,27 of transformer 25 secondary sides, because this circuit is existing circuit, so be not described in detail in this its structure and function.Certainly, converter 2 except half-bridge symmetry inductance inductance capacitance (LLC) type, other all is the adaptable category of the present invention as the converter of asymmetric inductance inductance capacitance (LLC), full-bridge inductance inductance capacitance (LLC), half-bridge symmetry inductance capacitance (LC), asymmetric inductance capacitance (LC) or full-bridge inductance capacitance (LC) type.
Above-mentioned pulse width modulation controlled unit 31, be in order to detect the output voltage V o and the resonance current of resonance type DC/DC converter 2, producing a pulse-width signal shown in Fig. 4 (I), and send this pulse-width signal to high frequency frequency-fixed signal generation unit 32 and logic synthesis unit 33.
Above-mentioned high frequency frequency-fixed signal generation unit 32, please shown in Figure 4 in conjunction with consulting, it is the schematic diagram of waveform of the majority signal of explanation the present invention controller preferred embodiment of being applied to resonance type DC/DC converter, after high frequency frequency-fixed signal generation unit 32 receives this pulse-width signal, promptly the rising edge with pulse-width signal is that synchronizing signal produces first a high frequency frequency-fixed signal shown in Fig. 4 (II), and sends this first high frequency frequency-fixed signal to logic synthesis unit 33.
Above-mentioned logic synthesis unit 33, after receiving this first high frequency frequency-fixed signal, at first produce the second high frequency frequency-fixed signal shown in Fig. 4 (III) of opposite with identical, the high electronegative potential of the first high frequency frequency-fixed signal frequency (anti-phase), to make multiplication synthetic with pulse-width signal respectively with the first high frequency frequency-fixed signal and the second high frequency frequency-fixed signal then, with produce one as Fig. 4 (IV) shown in first drive signal and second drive signal as Fig. 4 (V) shown in and export to distinguish control its switch 21,22.
The output voltage that detects resonance type DC/DC converter 2 when pulse width modulation controlled unit 31 too hour, just the high potential pulse bandwidth that increases pulse-width signal is (owing to the cycle of pulse-width signal is fixed, so the pulse bandwidth of electronegative potential just narrows down accordingly), make the ON time of diverter switch 21,22 in the cycle of each pulse-width signal increase, so just can improve the output voltage of resonance type DC/DC converter 2.On the contrary, when pulse width modulation controlled unit 31 detects the output voltage of resonance type DC/DC converter 2 when too high, as long as the high potential pulse bandwidth of pulse-width signal is reduced, make the ON time of diverter switch 21,22 in the cycle of each pulse-width signal reduce, just can reduce the output voltage of resonance type DC/DC converter 2, can make output voltage maintain certain value whereby.
As shown in the above description, the output voltage of 31 detections in pulse width modulation controlled unit resonance type DC/DC converter 2 just can be modulated the pulse bandwidth of pulse-width signal according to this, in addition, more preferably, pulse width modulation controlled unit 31 also can detect the resonance current of resonance type DC/DC converter 2 simultaneously, to obtain the resonance current shown in Fig. 4 (VI), and produce pulse-width signal according to resonance current and output voltage simultaneously, for example can compare with the error regulated quantity of resonance current and output voltage, the control of formation dicyclo reaches the pulse bandwidth of modulating pulse-width signal.
What deserves to be mentioned is that the frequency of pulse-width signal approximately is 1/10 times of frequency of the first high frequency frequency-fixed signal, but also can less than; And first, second drive signal is except can be in order to drive the diverter switch 21,22, also can be in order to the synchronous rectifier 26,27 of driving transformer 25 secondary sides, but so simplified structure design.
In addition, since present embodiment be with in conjunction with fixed frequently, first, second drive signal of being produced of first, second high frequency frequency-fixed signal and pulse-width signal of Fixed width reaches the control to resonance type DC/DC converter 2, so guaranteed that resonance type DC/DC converter 2 all is in best operating point (i.e. Gu Ding resonance frequency) under all loading conditions; And come control its switch 21,22 by first, second drive signal with fixed frequency and pulsewidth, can be easy to realize the design optimization of magnetic elements such as resonant inductance 24 and transformer 25.
Moreover, see also shown in Figure 4, because present embodiment is that the rising edge with pulse-width signal is that synchronizing signal produces the first high frequency frequency-fixed signal, so can guarantee at the first high-frequency impulse width of the first high frequency frequency-fixed signal of each pulse-width signal in the cycle identical, so can guarantee the initial condition unanimity of resonance current, shown in Fig. 4 (VI).Though present embodiment is that the rising edge with pulse-width signal is that synchronizing signal produces the first high frequency frequency-fixed signal, yet, falling edge that also can pulse-width signal is that synchronizing signal produces the first high frequency frequency-fixed signal, and this changes the scope that still belongs to technical solution of the present invention and contained.
In sum, of the present invention simple in structure, and, guaranteed that resonance type DC/DC converter 2 all is in best operating point under all loading conditions in conjunction with fixed frequency, first, second high frequency frequency-fixed signal of Fixed width and the diverter switch 21,22 that pulse-width signal is controlled resonance type DC/DC converter 2; And when simplifying the structure of controller 3, also reduced the switching times of diverter switch 21,22 and reduced the loss of diverter switch 21,22, so can reach purpose of the present invention and effect really.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (6)
1. controller that is applied to resonance type DC/DC converter, in order to control the diverter switch of described resonance type DC/DC converter, this controller comprises: a pulse width modulation controlled unit, a high frequency frequency-fixed signal generation unit and a logic synthesis unit is characterized in that:
This pulse width modulation controlled unit is the output voltage that detects described resonance type DC/DC converter, to produce a pulse-width signal;
This high frequency frequency-fixed signal generation unit produces a high frequency frequency-fixed signal with described pulse-width signal;
This logic synthesis unit is in order to described pulse-width signal and described high frequency frequency-fixed signal is synthetic to produce the drive signal that drives each described diverter switch.
2. the controller that is applied to resonance type DC/DC converter as claimed in claim 1 is characterized in that wherein said high frequency frequency-fixed signal generation unit is that rising edge with described pulse-width signal is the synchronizing signal that produces described high frequency frequency-fixed signal.
3. the controller that is applied to resonance type DC/DC converter as claimed in claim 1 or 2 is characterized in that wherein said pulse width modulation controlled unit more detects the resonance current of described resonance type DC converter, to produce described pulse-width signal.
4. the controller that is applied to resonance type DC/DC converter as claimed in claim 3 is characterized in that the frequency of the frequency of wherein said pulse-width signal less than described high frequency frequency-fixed signal.
5. the controller that is applied to resonance type DC/DC converter as claimed in claim 4, the frequency that it is characterized in that wherein said pulse-width signal are about 1/10 times of frequency of described high frequency frequency-fixed signal.
6. the controller that is applied to resonance type DC/DC converter as claimed in claim 4, the frequency that it is characterized in that wherein said pulse-width signal is less than 1/10 times of the frequency of described high frequency frequency-fixed signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100071139A CN101499724B (en) | 2008-01-31 | 2008-01-31 | Controller applied for resonance type DC/DC converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100071139A CN101499724B (en) | 2008-01-31 | 2008-01-31 | Controller applied for resonance type DC/DC converter |
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| CN101499724A CN101499724A (en) | 2009-08-05 |
| CN101499724B true CN101499724B (en) | 2011-06-29 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102214997B (en) * | 2010-04-07 | 2013-11-06 | 光宝电子(广州)有限公司 | Control module and control method of resonant conversion device and resonant converter |
| CN107342688B (en) * | 2016-04-29 | 2020-01-17 | 华为技术有限公司 | Resonant power converter and frequency tracking method thereof |
| CN107666244B (en) * | 2016-07-29 | 2020-11-27 | 中兴通讯股份有限公司 | Control method and device of resonant converter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1222266A (en) * | 1996-06-06 | 1999-07-07 | 株式会社I-Hits研究所 | AC/AC converter |
| CN1595780A (en) * | 2003-09-08 | 2005-03-16 | 艾默生网络能源有限公司 | Control method and apparatus for series resonance DC/DC converter |
| CN1992493A (en) * | 2005-12-30 | 2007-07-04 | 艾默生网络能源系统有限公司 | Resonant DC/DC converter and control method thereof |
-
2008
- 2008-01-31 CN CN2008100071139A patent/CN101499724B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1222266A (en) * | 1996-06-06 | 1999-07-07 | 株式会社I-Hits研究所 | AC/AC converter |
| CN1595780A (en) * | 2003-09-08 | 2005-03-16 | 艾默生网络能源有限公司 | Control method and apparatus for series resonance DC/DC converter |
| CN1992493A (en) * | 2005-12-30 | 2007-07-04 | 艾默生网络能源系统有限公司 | Resonant DC/DC converter and control method thereof |
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| CN101499724A (en) | 2009-08-05 |
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Effective date of registration: 20170222 Address after: Wujin, Changzhou province high tech Industrial Development Zone, 88 Yang Lake Road, No. Patentee after: LITE-ON Technology (Chang Zhou) Co.,Ltd. Patentee after: Lite-On Technology Co.,Ltd. Address before: Taipei City, Taiwan, China Patentee before: Lite-On Technology Co.,Ltd. |
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Granted publication date: 20110629 Termination date: 20220131 |