CN101777844B - Resonant converter provided with phase shift output route - Google Patents
Resonant converter provided with phase shift output route Download PDFInfo
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- CN101777844B CN101777844B CN2009100001592A CN200910000159A CN101777844B CN 101777844 B CN101777844 B CN 101777844B CN 2009100001592 A CN2009100001592 A CN 2009100001592A CN 200910000159 A CN200910000159 A CN 200910000159A CN 101777844 B CN101777844 B CN 101777844B
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Abstract
The invention relates to a resonant converter provided with a phase shift output route. The resonant converter comprises a resonant conversion circuit, a switching unit, an electric power conversion circuit, a main output circuit, a resonant control unit, and at least one auxiliary output circuit, wherein the resonant conversion circuit acquires input electric power and modulates the input electric power into at least one resonant electric power; the switching unit switches the input electric power and conducts a period through the resonant conversion circuit; the electric power conversion circuit modulates the resonant electric power and outputs conversion electric power; the main output circuit is connected with the electric power conversion circuit and modulates the conversion electric power into main output electric power; the resonant control unit is electrically connected with the main output circuit to acquire a feedback signal and generate a resonant control signal, and the switching unit is driven by the resonant control signal; the at least one auxiliary output circuit is connected with the electric power conversion circuit and acquires the conversion electric power; the auxiliary output circuit is provided with a bridge type rectifying unit and a phase shift control unit; the phase shift control unit is electrically connected with the resonant control unit to acquire the resonant control signal and modulates the resonant control signal into a phase shift driving signal; and the bridge type rectifying unit is controlled by the phase shift driving signal to modulate the conversion electric power into auxiliary output electric power. Therefore, the conversion efficiency of the conventional circuit is enhanced and the deficiency of cross regulation is improved.
Description
Technical field
The present invention relates to a kind of resonance converter that possesses phase shift output route, is a kind of framework of power-switching circuit, particularly relates to a kind of resonance converter that possesses phase shift output route that utilizes resonance and phase shift control technology.
Background technology
Various countries' rules require to improve constantly for the conversion efficiency of power supply unit now; The 80PLUS standard (standard) of Energy Star (Energy star) promulgation is at present stipulated the efficient of the multiple-output electric power that is used for computer and server; 80plus standard (standard) is divided into four grades: 80plus E-star 4.0; 80plus bronze medal (bronze), 80plus silver medal (silver) and80plus gold medal (gold).Wherein 80plus gold medal (gold) requires the efficient of power supply under 20%, 50% and 100% load to be respectively 87%, 90% and 87%.The general structure of current computer and server power supply is PFC+multi-output DC/DC; Wherein the efficient of PFC when low level circuit (lowline) can reach 94% usually; For satisfying 80plus gold medal (gold) requirement, the conversion efficiency of back level DC/DC converter just requires greater than 96%.Can predict simultaneously; Along with further developing of electronic product towards miniaturization; Power density to computer power has requirements at the higher level, so the multi-output DC/DC transducer (converter) of high efficiency and high power density is very big challenge as far as the manufacturer that researches and develops power supply unit.
High efficiency, high voltage stability precision; Small size is three big requirements of the multi-output DC/DC transducer (converter) of high power density; At present ATX not to volume reduce further requirement is arranged, so high efficiency and high voltage stability precision are the main targets that power supply designs.It is a key factor must considering in the power supply design that the retention time of computer power (hold up time) requires.When input electric power, PFC will import power conversions and become adjustable direct voltage (such as 400V), after the input loss of power, require power supply to keep output voltage 20mS, and this 20mS is the retention time (hold up time).During the retention time (hold up time), the 400V voltage of PFC output constantly reduces, and up to minimum voltage, DC/DC turn-offs, and output voltage disappears.Output will keep stable during retention time (Hold up time), so require DC/DC under certain input voltage range, to work, concrete input voltage range is relevant with capacitor's capacity and power, can express with following formula:
Can be known that by following formula capacitor's capacity and voltage range are inversely proportional to, enlarge input voltage range and can reduce the electric capacity volume, increase power density, the input voltage range of broad selects for topology and circuit design is brought difficulty.This is an important research project very at present.
The key that improves conversion efficiency is to suppress the handoff loss of transducer; Existing convention transducer switches (direct-cut operation when curtage is all very high; Hard switching) can produce very high handoff loss; Therefore improvement is switched under zero current or zero-voltage state even for when curtage descends, switching (soft handover, soft switching) after.The following several types of circuit topologies with higher conversion efficiency are arranged at present: active is clamp (active clamp forward, ACF) circuit, LLC circuit and two active bridge-type (dual active bridge, DAB) circuit forward.Seeing also shown in Figure 1ly, is the initiatively circuit framework figure of clamp circuit forward of existing convention, and the circuit framework of ACF circuit and operating mode are known by this technical field, so repeat no more.The ACF circuit can partially or completely be realized the ZVT (ZVS) of primary switch pipe, thereby efficient is higher; Magnetic core of transformer is operated in one or three quadrants simultaneously, and the magnetic core utilance is high.But the ACF circuit has several inherent defects, as: the hard shutoff causes big turn-off power loss; Realize ZVS completely, need add extra inductance and reduce magnetizing inductance, increase the duty ratio that inductance can reduce equivalence, reduce magnetizing inductance and can increase exciting curent, cause big copper loss and switch conduction loss; There is intersection adjusting problem (cross regulation); (Pulse Width Modulation, PWM) ACF of control is difficult to satisfy simultaneously high efficiency and wide-voltage range job requirement to belong to traditional pulse width modulation.What therefore the efficient of ACF framework can not be done is very high, but because realized that ZVS is open-minded, its efficient is higher than general PWM framework such as double tube positive exciting, half-bridge circuit etc.ONNN (On-semi) company can satisfy 80plus E-star 4.0 based on the 250W ATX power supply of ACF design, makes the efficient of power supply under 20%, 50% and 100% load can be greater than 80%.
What in the level DC/DC of back, have application prospect most at present is the LLC circuit; See also shown in Figure 2; Be the circuit framework figure of an existing convention LLC circuit, the LLC circuit is the resonant circuit that is constituted through two L (inductor) and a C (capacitor), through the cycle of one group of diverter switch, 301 controls, one input flow of power to a LLC loop 302; This input electric power is through delivering to secondary side output by a transformer 303 with power after the gain in this LLC loop 302; And produce a control impuls at primary side one control chip 304, by the cycle that this control impuls is switched through this diverter switch 301 of a driver 305 adjustment, each node waveform of circuit shown in Fig. 2 sees also Fig. 3, shown in Figure 4; Fig. 3 is the circuit node oscillogram of Fig. 2, and Fig. 4 is the resonance characteristic curve of Fig. 2 circuit.The capacitance that the LLC circuit has that zero voltage switching, turn-off power loss are little, operating voltage range extensively and not need be sacrificed just often conversion efficiency of input electric power, PFC electric capacity can reduce, volume can reduce, thereby improves advantage such as power density.
(Dual Active Bridge, DAB) circuit can be realized very high power density to be applied to two initiatively bridge-types of high power D C/DC.See also shown in Figure 5; Be the two initiatively bridge circuit Organization Charts of an existing convention; This circuit comprises the diverter switch 301 of two groups of full-bridge types, the transformer 303 that an inductor and is used for isolated power; And, see also shown in Figure 6ly by control chip 304 action with driver 305 these diverter switches 301 of control, be the circuit node oscillogram of Fig. 5; The rectifier switch conducting sequential of primary side and secondary side has a phase shift angle (Φ) among wherein visible Fig. 5; The circuit framework of Fig. 5 can be adjusted output gain (gain) through changing phase shift angle and changing switching frequency, moreover, can reach zero voltage switching and adjustment power output through the phase place of controlling primary side and secondary side switches conducting; But its characteristic is primary side and secondary side switches zero voltage switching, and can be operated in the efficient when not sacrificing operate as normal under the wide-voltage range input.The DAB circuit because of realizing the zero voltage switching of secondary side switches pipe, so more high pressure output occasion that is applied in the high efficiency requirement more.It is very little to be used for the inductance value of transmission of power in the DAB circuit, can use the leakage inductance of transformer to realize, so the DAB circuit can be realized very high power density.Output is used to the low pressure of computer power, and DAB circuit its turn-off power loss of comparing with the LLC circuit is bigger, but the DAB circuit is realized synchronous rectification more easily than LLC circuit.
Because the LLC circuit has the characteristics of high conversion efficiency, so be that the multi-output DC/DC transducer (converter) of body frame structure is a research focus with LLC.It is shown in Figure 7 that several kinds of representative frameworks are that LLC+ magamp (magamp) sees also, and is that existing convention utilizes magamp to adjust the enforcement state diagram of secondary output power; It is shown in Figure 8 that LLC utilizes the output of transformer coupled realization multichannel to see also, and being existing convention adjusts the enforcement state diagram of secondary output power according to voltage ratio, and LLC adds cascade buck and a plurality of independently LLC realizes multichannel output etc.More than these circuit pluses and minuses are respectively arranged, its application scenario is also respectively arranged.Shown in Figure 7 is the circuit framework of LLC+ magamp (magamp); This circuit has one group of diverter switch 301, a LLC loop 302, a transformer 303 1 control chips 304 and a driver 305; This LLC loop 302 provides main output, and these transformer 303 secondary sides more connect auxiliary circuits such as two magamps 307 (magamp) and control loop 306 auxiliary output is provided.Magamp 307 (magamp) is controlled so as to a switch, and the functional equivalent of magamp 307 (magamp) and the auxiliary circuit that connects thereof is in the buck circuit, and it is low to have a cost, and each road output is accurately regulated, and controls advantages such as simple.But its major defect is following: 1. saturation inductors has core loss, copper loss; 2. the conduction loss of rectifier diode, reverse recovery loss; 3.LLC it is bigger that the synchronous rectification of circuit is influenced by the magnetic saturation amplifying circuit; 4. the intrinsic dead time effect of saturable magnetic circuit makes its operating frequency limited.Therefore LLC+ magamp (magamp) circuit can not be realized very high efficient.
See also shown in Figure 8; For LLC utilizes the transformer coupled multichannel output that realizes; The circuit framework that wherein a plurality of diverter switches 301 connect a LLC loop 302, a transformer 303 is identical with previous existing known techniques, but the work period through a proportion distributor circuit 92 and a coupling element 93 adjustment one driver 305, the greatest problem of this framework is an intersection adjusting problem; At first the number of turn ratio of second siding ring can not be equal to the ratio of output voltage, can influence degree of regulation like this.Secondly; If the only main output of control, then auxiliary output only depends on coupling to regulate, and precision is very poor; Adopt weighting control to improve; But weighting control is to let error two-way output share, like this since each road all can not accurately regulate, so this structure can only be applied in the less demanding occasion of voltage stabilizing.In order to improve the effect of intersect regulating and using a plurality of independently LLC circuit can reach high efficiency and precisely regulate, but cost, volume are excessive; If as the primary outlet road and the rear end connects this primary outlet road with step-down controller (buck converter) and forms secondary outlet line,, reduced whole conversion efficiency though each outlet line all can accurately be adjusted with the LLC circuit.
This shows that above-mentioned existing each circuit obviously still has inconvenience and defective, and demands urgently further improving 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 is developed completion, 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 resonance converter that possesses phase shift output route 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.
To the pluses and minuses of above each circuit, the present invention proposes a kind of high power density cheaply, multi-output DC/DC transducer (converter) framework of high voltage stability precision.This framework still is main output with LLC; Export as auxiliary with DAB; In conjunction with the high efficiency of LLC and DAB, the advantage of small size, the inductance of the resonant inductance of LLC, DAB transmission of power can utilize transformer leakage inductance to realize; So can realize very high power density, and each road is exported independent adjusting and can be realized the very high precision of voltage regulation.
Summary of the invention
The objective of the invention is to; Each circuit framework that overcomes existing convention probably is difficult to reach the defective of requirement target; And a kind of resonance converter that possesses phase shift output route of new structure is provided; Technical problem to be solved is to improve its circuit framework, reaches to improve conversion efficiency and reduce loss and have the beneficial effect of good interleave regulating power, is very suitable for practicality.
The object of the invention and solve its technical problem and adopt following technical scheme to realize.A kind of resonance converter that possesses phase shift output route according to the present invention's proposition; Switch this input electric power through the switch unit of the turn-on cycle of this harmonic conversion circuit, the power conversion circuit that a modulating resonance electric power is exported a power conversion comprising the harmonic conversion circuit, obtaining an input electric power and be modulated at least one resonance electric power; Wherein this harmonic conversion circuit comprises a resonant capacitance, a resonant inductance and shunt inductance; This shunt inductance is connected this resonant inductance with an end of this power conversion circuit parallel connection and this shunt inductance; And this resonance converter more comprises: one connects this power conversion circuit and modulates the main output circuit that this power conversion is a main output power; And the main output power that a resonance control unit electrically connects this main output circuit produces a resonance control signal to capture a feedback signal, and this switch unit is driven by this resonance control signal; And this power conversion circuit of at least one connection is obtained the secondary output circuit of this power conversion; This pair output circuit has a bridge rectifier unit and a phase shift control unit; This phase shift control unit electrically connects this resonance control unit obtaining this resonance control signal and to be modulated to a phase shift drive signal, and to receive this phase shift drive signal control and modulate this power conversion be a secondary output power in this bridge rectifier unit.
The object of the invention and solve its technical problem and also can adopt following technical measures further to realize.
The aforesaid resonance converter that possesses phase shift output route; Wherein said power conversion circuit is a transformer; This transformer has one lateral coils and a plurality of independently second siding ring, and wherein a plurality of second siding rings are connected to this main output circuit and a plurality of secondary output circuit.
The aforesaid resonance converter that possesses phase shift output route, wherein said a plurality of second siding rings have the different number of turn, and making in the secondary output power that this pair output circuit provides at least, one of which has the voltage level different with this main output power.
The aforesaid resonance converter that possesses phase shift output route, wherein said power conversion circuit comprises more than one transformer, and definition one main transformer connects this main output circuit and exports this main output power in more than one transformer.
The aforesaid resonance converter that possesses phase shift output route, wherein said power conversion circuit more comprise at least one teaser transformer that is different from this main transformer, and the secondary side of this teaser transformer connects at least one secondary output circuit.
The aforesaid resonance converter that possesses phase shift output route, the primary side of wherein said teaser transformer connects this harmonic conversion circuit.
The aforesaid resonance converter that possesses phase shift output route, the primary side of wherein said teaser transformer is parallelly connected with the primary side of this main transformer.
The aforesaid resonance converter that possesses phase shift output route, the primary side of wherein said teaser transformer connects this switch unit and parallelly connected with this harmonic conversion circuit, and is connected a capacity cell between the primary side of this teaser transformer and this switch unit.
The aforesaid resonance converter that possesses phase shift output route, wherein said phase shift drive signal receive this phase shift control unit modulation and have a phase difference with this resonance control signal.
The aforesaid resonance converter that possesses phase shift output route, wherein said phase shift control unit captures one second feedback signal to modulate the time distance of this phase shift drive signal from this pair output power.
The aforesaid resonance converter that possesses phase shift output route, wherein said switch unit are the full-bridge type loop that a plurality of switch element constituted, and the resonance control signal that each switch element is produced by this resonance control unit drives.
The aforesaid resonance converter that possesses phase shift output route, wherein said switch unit are the semibridge system loop that a plurality of switch element constituted, and the resonance control signal that each switch element is produced by this resonance control unit drives.
The aforesaid resonance converter that possesses phase shift output route, the corresponding capacity cell of switch element parallel connection of wherein said switch unit.
The aforesaid resonance converter that possesses phase shift output route, wherein said main output circuit have one be controlled by this resonance control signal the synchronous rectification unit, this synchronous rectification unit connects this power conversion circuit.
The aforesaid resonance converter that possesses phase shift output route, wherein said synchronous rectification unit are the full-bridge type rectification circuit that a plurality of switch elements constitute.
The aforesaid resonance converter that possesses phase shift output route, wherein said synchronous rectification unit are the band centre tap circuit that a plurality of switch elements constitute.
The aforesaid resonance converter that possesses phase shift output route, wherein said bridge rectifier unit are the full-bridge type rectification circuit that a plurality of switch elements constitute.
The aforesaid resonance converter that possesses phase shift output route, wherein said bridge rectifier unit are half bridge rectifier that a plurality of switch elements constitute.
The aforesaid resonance converter that possesses phase shift output route, polyphone one clamping capacitance is to adjust the voltage level of this bridge rectifier output between the switch element of wherein said bridge rectifier.
The present invention compared with prior art has tangible advantage and beneficial effect.Know by above; For achieving the above object; The invention provides a kind of resonance converter that possesses phase shift output route; Switch this input electric power through the switch unit of the turn-on cycle of this harmonic conversion circuit, the power conversion circuit that a modulating resonance electric power is exported a power conversion comprising the harmonic conversion circuit, obtaining an input electric power and be modulated at least one resonance electric power; Wherein this harmonic conversion circuit comprises a resonant capacitance, a resonant inductance and shunt inductance; This shunt inductance is connected this resonant inductance with an end of this power conversion circuit parallel connection and this shunt inductance, and this resonance converter more comprises a main output circuit and at least one secondary output circuit, and this main output circuit connects this power conversion circuit and modulates this power conversion is a main output power; And the main output power that a resonance control unit electrically connects this main output circuit produces a resonance control signal to capture a feedback signal, and this switch unit is driven by this resonance control signal; This pair output circuit connects this power conversion circuit and obtains this power conversion; This pair output circuit has a bridge rectifier unit and a phase shift control unit; This phase shift control unit electrically connects this resonance control unit obtaining this resonance control signal and to be modulated to a phase shift drive signal, and to receive this phase shift drive signal control and modulate this power conversion be a secondary output power in this bridge rectifier unit; Wherein above-mentioned harmonic conversion circuit has the shunt inductance that a resonant capacitance, a resonant inductance and are parallel to this power conversion circuit; Has the LLC resonant circuit to form one; Should then utilize phase shift control by the pair outlet line; By above-mentioned circuit framework can further improve conversion efficiency, conversion efficiency when reducing the wastage, importing electric power and under having the voltage adaptable degree of relative broad range, still not sacrificing operate as normal, and reach the advantage that the LLC circuit can provide many output powers.
By technique scheme, the resonance converter that the present invention possesses phase shift output route has advantage and beneficial effect at least:
1, the present invention can merge LLC circuit and phase shift and controls and improve conversion efficiency.
Conversion efficiency when 2, the present invention can still not sacrifice operate as normal under the input voltage of power permission of relative broad range.
3, the present invention provides multichannel output and can realize the very high precision of voltage regulation.
In sum; The invention relates to a kind of resonance converter that possesses phase shift output route; Switch this input electric power through the switch unit in this harmonic conversion circuit turn-on cycle, the power conversion circuit that a modulating resonance electric power is exported a power conversion comprising the harmonic conversion circuit, obtaining an input electric power and be modulated at least one resonance electric power; More comprise a main output circuit and at least one secondary output circuit; This main output circuit connects this power conversion circuit and modulates this power conversion is a main output power; And a resonance control unit electrically connects this main output circuit and produces a resonance control signal to capture a feedback signal; This pair output circuit connects this power conversion circuit and obtains this power conversion, and establishes a phase shift control unit and obtain this resonance control signal and be modulated to a phase shift drive signal, and should the pair output circuit to receive this phase shift drive signal control and modulate this power conversion be a secondary output power; Improve the conversion efficiency of existing convention circuit by this, improve the disappearance that intersection is regulated.The present invention has obvious improvement technically, and has tangible good effect, really is the new design of a novelty, progress, practicality.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention; Understand technological means of the present invention in order can more to know; And can implement according to the content of specification, and for let of the present invention above-mentioned with other purposes, feature and advantage can be more obviously understandable, below special act preferred embodiment; And conjunction with figs., specify as follows.
Description of drawings
Fig. 1 is the forward circuit framework figure of clamp circuit of existing convention active.
Fig. 2 is the circuit framework figure of an existing convention LLC circuit.
Fig. 3 is the circuit node oscillogram of Fig. 2.
Fig. 4 is the resonance characteristic curve of Fig. 2 circuit.
Fig. 5 is the two initiatively bridge circuit Organization Charts of an existing convention.
Fig. 6 is the circuit node oscillogram of Fig. 5.
Fig. 7 is that existing convention utilizes magamp to adjust the enforcement state diagram of secondary output power.
Fig. 8 is secondary output power is adjusted in existing convention according to voltage ratio enforcement state diagram.
Fig. 9 is the enforcement view of the present invention's first preferred embodiment.
Figure 10 is the enforcement view of the present invention's second preferred embodiment.
Figure 11 is the enforcement view of the present invention's the 3rd preferred embodiment.
Figure 12 is the power waveform figure that indicates among Figure 11.
Figure 13 is the enforcement view of the present invention's the 4th preferred embodiment.
Figure 14 is the circuit node oscillogram of Figure 13.
Figure 15 is the enforcement view of the present invention's the 5th preferred embodiment.
Figure 16 is the enforcement view of the present invention's the 6th preferred embodiment.
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention; Below in conjunction with accompanying drawing and preferred embodiment; To its embodiment of the resonance converter that possesses phase shift output route, structure, characteristic and the effect thereof that proposes according to the present invention, specify as after.
Relevant aforementioned and other technology contents, characteristics and effect of the present invention can be known to appear in the detailed description of graphic preferred embodiment is consulted in following cooperation.Through the explanation of embodiment, when can being to reach technological means that predetermined purpose takes and effect to obtain one more deeply and concrete understanding to the present invention, yet the appended graphic usefulness that only provides reference and explanation be not to be used for the present invention is limited.
Circuit framework of the present invention sees also shown in Figure 9; It is the enforcement view of the present invention's first preferred embodiment; A kind of resonance converter that possesses phase shift output route of preferred embodiment of the present invention is comprising a switching unit 3, a harmonic conversion circuit 1, a power conversion circuit 2
This power conversion circuit 2 is a transformer, and this transformer is arranged with independently second siding ring 202,203 of one lateral coils 201 and two; After the electric power source 101 that connects this circuit obtains an input electric power; Switch the turn-on cycle of this input electric power by this switch unit 3 through this harmonic conversion circuit 1; This switch unit 3 is the bridge type return that a plurality of switch element constituted; Control the cycle of input flow of power by the staggered conducting of a plurality of switch elements to this harmonic conversion circuit 1
This harmonic conversion circuit 1; Comprise a resonant capacitance 11, a resonant inductance 12 and shunt inductance 13; This shunt inductance 13 is connected this resonant inductance 12 with an end of these power conversion circuit 2 parallel connections and this shunt inductance 13; Modulate this input electric power formation resonance electric power and deliver to this power conversion circuit 2 by this harmonic conversion circuit 1 resonance characteristic own, this power conversion circuit 2 is modulated these resonance electric power and is exported a power conversion;
This switch unit 3; Can shown in figure, be the semibridge system loop that two switch elements are constituted; And this switch unit 3 more can be in the other parallelly connected corresponding capacity cell (C1 among the figure, C2) of those switch elements to bear direct voltage partly; Can reduce the direct voltage that this resonant capacitance 11 is born, further can select withstand voltage less capacity cell (for example MLCC, laminated ceramic electric capacity);
This resonance converter more comprises a main output circuit 10 and at least one secondary output circuit 20, wherein:
This main output circuit 10; Having a synchronous rectification unit 7 connects the second siding ring 202 of this power conversion circuit 2 and obtains this power conversion; And be modulated to a main output power 102 through the switching of a synchronous rectification unit 7; And a resonance control unit 4 electrically connects the main output power 102 of this main output circuit 10; This resonance control unit 4 captures first feedback signal of these main output power 102 generations and produces a resonance control signal according to this first feedback signal, and this resonance control signal drives these synchronous rectification unit 7 through a driver 52, adjusts the switching cycle of this synchronous rectification unit 7 by this; This resonance control signal forms the control signal of pulse kenel again through the modulation of a pulse modulation unit 54; And this control signal is sent to another driver 51 through an ancillary coil 91; Provide driven by power this switch unit 3 through this driver 51; The resonance control signal that makes each switch element of this switch unit 3 produced by this resonance control unit 4 drives, to control the cycle that this input electric power passes through;
Simultaneously; This pair output circuit 20; Be connected in another independently second siding ring 203; This pair output circuit 20 has the bridge rectifier unit 8 of this second siding ring 203 of electric connection; And one electrically connect this resonance control unit 4 to obtain the phase shift control unit 6 of this resonance control signal, and this bridge rectifier unit 8 also is made up of a plurality of switch element, and this phase shift control unit 6 is obtained this resonance control signal and modulation generation one phase shift drive signal; Has a phase difference between this phase shift drive signal and this resonance control signal; This phase shift drive signal equally drives these bridge rectifier unit 8 through a driver 53, and this bridge rectifier unit 8 receives this phase shift drive signal control and modulates this power conversion and form a secondary output power 103, this phase shift control unit 6 from this pair output power 103 acquisitions one second feedback signal to modulate the time distance of this phase shift drive signal; So, the mode of this pair output circuit 20 phase shifts controls capable of using and reaching changes the effect of output gain and zero voltage switching, minimizing turn-off power loss.
The described circuit framework of Fig. 9 is the most basic example of the present invention; And the present invention more comprises the form with a plurality of secondary output circuits 20; See also shown in Figure 10; It is the enforcement view of the present invention's second preferred embodiment; Wherein this power conversion circuit 2 still is one to be wound with a plurality of coil transformers; This transformer has one lateral coils 201 and a plurality of independently second siding ring 202,203,204; Wherein this second siding ring 202 connects this main output circuit 10; Still this imports flow of power to the cycle of this harmonic conversion circuit 1 by these switch unit 3 controls for 203,204 a plurality of secondary output circuits 20 of connection out of the ordinary of other second siding rings, these power conversion circuit 2 front ends (primary side of this transformer), and switch unit 3 shown in Figure 10 then is the most basic semibridge system loop shape; The resonance control signal that is controlled by this resonance control unit 4 that the action of this switch unit 3 is same (being sent to this switch unit 3) through this pulse modulation unit 54, ancillary coil 91 and this driver 51; And the main output circuit 10 of these power conversion circuit 2 rear ends (secondary side of this transformer) also the framework with shown in Figure 9 is identical, and enforcement state shown in Figure 10 is to connect a plurality of secondary output circuits 20 through a plurality of second siding rings of this transformer winding 203,204 to form a plurality of secondary output powers 103, and in these a plurality of secondary output powers 103 at least one of which have the voltage level different with this main output power 102; These a plurality of secondary output powers 103 more can have different voltage level, and each secondary output power 103 has many groups of secondary output powers 103 of identical or different voltage level through the output independent with driver 53 of phase shift control unit 6 independently; Therefore this electric power framework can be set output quantity and voltage according to the needs of power supply unit; In addition; The bridge rectifier unit 8 of the switch unit 3 in the enforcement state of above-mentioned Fig. 9 and Figure 10, synchronous rectification unit 7 and secondary output circuit 20; Can be full-bridge type or half bridge circuit that a plurality of switch elements constitute respectively; And this synchronous rectification unit 7 can be and has centre tapped circuit (as shown in Figure 9), and the technology that between a plurality of switch elements, obtains electric power by centre cap is known by the those skilled in the art of this technical field, thus only with Fig. 9 as representative.
See also shown in Figure 11 again; It is the enforcement view of the present invention's the 3rd preferred embodiment; Switch unit shown in this Fig 3 and bridge rectifier unit 8 are all the form of semibridge system, and that each power waveform that is indicated among Figure 11 sees also is shown in Figure 12, are the power waveform figure that indicates among Figure 11; A wherein visible resonance control signal waveform 401 and a phase shift control signal waveform 402 have a phase shift angle (Φ), can adjust output gain (gain) by this phase shift angle of control (Φ); Please consult shown in Figure 13 again; Be the enforcement view of the present invention's the 4th preferred embodiment, circuit framework shown in Figure 13 is identical with Figure 11 haply, but in the bridge rectifier unit 8 of the secondary output circuit 20 of Figure 13 a clamping capacitance 81 is set more; The voltage level of these these bridge rectifier unit 8 outputs of clamping capacitance 81 adjustment improves or reduces; Position to adjust 103 outputs of this pair output power is accurate, sees also shown in Figure 14ly, is the circuit node oscillogram of Figure 13; The operation principles of this clamping capacitance 81 is known by the those skilled in the art of this technical field, so repeat no more.
See also shown in Figure 15; It is the enforcement view of the present invention's the 5th preferred embodiment; Power conversion circuit 2 in the foregoing circuit also can comprise more than one transformer, and in more than one transformer, defines a main transformer 21, and all the other transformers are defined as one or more teaser transformers 22; Wherein this main transformer 21 and this teaser transformer 22 all have one lateral coils 211,221 and a second siding ring 212,222; The first siding ring 211 of this main transformer 21 connects this harmonic conversion circuit 1, and this shunt inductance 13 is parallelly connected with this first siding ring 211, and 212 of the second siding rings of this main transformer 21 connect this main output circuit 10; 221 of the primary sides of this teaser transformer 22 connect this resonant inductance 12 and parallelly connected with this shunt inductance 13; 222 of these teaser transformer 22 second siding rings connect at least one secondary output circuit 20; 8 the controls in the bridge rectifier unit of this pair output circuit 20 according to this phase shift control unit 6 and this driver 53, this phase shift control unit 6 more captures one second feedback signal to modulate the time distance of this phase shift drive signal from this pair output power 103 except connecting this resonance control unit 4; And the form with a plurality of transformers also can be shown in figure 16; It is the enforcement view of the present invention's the 6th preferred embodiment; Also distinguish in a plurality of transformers and be at least one main transformer 21 and at least one teaser transformer 22 (this main transformer 21 and teaser transformer 22 are example with all among Figure 16); Its main circuit framework is all identical with Figure 15; And the embodiment of Figure 16 and Figure 15 different places be that the first siding ring 221 of this teaser transformer 22 is connected in this switch unit 3 and parallelly connected with this harmonic conversion circuit 1; And be connected a capacity cell (Cb1) between the first siding ring 221 of this teaser transformer 22 and this switch unit 3; The output of the secondary output circuit 20 that the second siding ring 222 of this teaser transformer 22 connects then receives the control of this phase shift control unit 6, and wherein this phase shift control unit 6 more captures one second feedback signal to modulate the time distance of this phase shift drive signal from this pair output power 103 except connecting this resonance control unit 4.
As stated; The beneficial functional that foregoing circuit can reach is: the high efficiency that has both had the LLC circuit; Can effectively adjust the power of a plurality of output circuits again by phase shift control, this case is to merge LLC circuit and two active bridge-type (Dual active bridge, DAB) advantage of circuit; Each secondary output circuit then can be according to these phase shift control unit 6 independent controls to realize accurate adjusting; Possess LLC circuit high conversion efficiency, well-to-do input voltage range, and have the outstanding rear end of two initiatively bridge-type (dual active bridge) circuit concurrently and regulate (POST REGULATION) ability, reach the advantage that whole conversion efficiency is higher, have accurate adjusting.
Though the present invention discloses as above with preferred embodiment; Yet it is not in order to limit the present invention; Wherein, Above-mentioned switch unit 3 can be full-bridge type loop, semibridge system loop or by three kinds of kenels (above-mentioned three kinds of kenels are all the rectification circuit that those skilled in the art knew in this technical field) such as semibridge system loop collocation capacity cells, and this bridge rectifier unit 8 also can be full-bridge type loop, semibridge system loop or the semibridge system loop clamping capacitance 81 of arranging in pairs or groups; In addition; Though above-mentioned shunt inductance 13 with one independently inductance element be shown among the figure; But this harmonic conversion circuit 1 more can use the equivalent magnetizing inductance of this main transformer 21 to be regarded as shunt inductance 13; That is this harmonic conversion circuit 1 need not connect the inductance element of entity, and through being connected with this main transformer 21 and producing the effect that resonance can reach expection with the equivalent magnetizing inductance of this main transformer 21; Anyly be familiar with the professional and technical personnel; In not breaking away from technical scheme scope of the present invention; When the technology contents of above-mentioned announcement capable of using 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 scheme of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.
Claims (19)
1. resonance converter that possesses phase shift output route; Switch this input electric power through the switch unit (3) of the turn-on cycle of this harmonic conversion circuit (1), the power conversion circuit (2) that a modulating resonance electric power is exported a power conversion comprising the harmonic conversion circuit (1), obtaining an input electric power and be modulated at least one resonance electric power; Wherein this harmonic conversion circuit (1) comprises a resonant capacitance (11), a resonant inductance (12) and shunt inductance (13); This shunt inductance (13) is connected this resonant inductance (12) with an end of this power conversion circuit (2) parallel connection and this shunt inductance (13), and it is characterized in that this resonance converter more comprises:
One connects this power conversion circuit (2) and modulates the main output circuit (10) that this power conversion is a main output power (102); And the main output power (102) that a resonance control unit (4) electrically connects this main output circuit (10) produces a resonance control signal to capture a feedback signal, and this switch unit (3) is driven by this resonance control signal; And
This power conversion circuit of at least one connection (2) is obtained the secondary output circuit (20) of this power conversion; This pair output circuit (20) has a bridge rectifier unit (8) and a phase shift control unit (6); This phase shift control unit (6) electrically connects this resonance control unit (4) obtaining this resonance control signal and to be modulated to a phase shift drive signal, and to receive this phase shift drive signal control and modulate this power conversion be a secondary output power (103) in this bridge rectifier unit (8).
2. the resonance converter that possesses phase shift output route according to claim 1; It is characterized in that wherein said power conversion circuit (2) is a transformer; This transformer has one lateral coils (201) and a plurality of independently second siding ring (202,203,204), and wherein a plurality of second siding rings (202,203,204) are connected to this main output circuit (10) and a plurality of secondary output circuit (20).
3. the resonance converter that possesses phase shift output route according to claim 2; It is characterized in that wherein said a plurality of second siding ring (203,204) has the different number of turn, in the secondary output power (103) that order should pair output circuit (20) provides at least one of which have and the different voltage level of this main output power (102).
4. the resonance converter that possesses phase shift output route according to claim 1; It is characterized in that wherein said power conversion circuit (2) comprises more than one transformer, and definition one main transformer (21) connects this main output circuit (10) and this main output power (102) of output in more than one transformer.
5. the resonance converter that possesses phase shift output route according to claim 4; It is characterized in that wherein said power conversion circuit (2) more comprises at least one teaser transformer that is different from this main transformer (21) (22), and the secondary side of this teaser transformer (22) connects at least one secondary output circuit (20).
6. the resonance converter that possesses phase shift output route according to claim 5 is characterized in that the primary side of wherein said teaser transformer (22) connects this harmonic conversion circuit (1).
7. the resonance converter that possesses phase shift output route according to claim 5 is characterized in that the primary side of wherein said teaser transformer (22) is parallelly connected with the primary side of this main transformer (21).
8. the resonance converter that possesses phase shift output route according to claim 5; The primary side that it is characterized in that wherein said teaser transformer (22) connects this switch unit (3) and parallelly connected with this harmonic conversion circuit (1), and is connected a capacity cell between the primary side of this teaser transformer (22) and this switch unit (3).
9. the resonance converter that possesses phase shift output route according to claim 1 is characterized in that wherein said phase shift drive signal receives this phase shift control unit (6) modulation and has a phase difference with this resonance control signal.
10. the resonance converter that possesses phase shift output route according to claim 1 is characterized in that wherein said phase shift control unit (6) should capture one second feedback signal to modulate the time distance of this phase shift drive signal by pair output power (103) certainly.
11. the resonance converter that possesses phase shift output route according to claim 1; It is characterized in that wherein said switch unit (3) is the full-bridge type loop that a plurality of switch element constituted, and the resonance control signal that each switch element is produced by this resonance control unit (4) drives.
12. the resonance converter that possesses phase shift output route according to claim 1; It is characterized in that wherein said switch unit (3) is the semibridge system loop that a plurality of switch element constituted, and the resonance control signal that each switch element is produced by this resonance control unit (4) drives.
13. the resonance converter that possesses phase shift output route according to claim 12 is characterized in that the corresponding capacity cell of switch element parallel connection of wherein said switch unit (3).
14. the resonance converter that possesses phase shift output route according to claim 1; It is characterized in that wherein said main output circuit (10) have one be controlled by this resonance control signal synchronous rectification unit (7), this synchronous rectification unit (7) connects this power conversion circuit (2).
15. the resonance converter that possesses phase shift output route according to claim 14 is characterized in that the full-bridge type rectification circuit that wherein said synchronous rectification unit (7) constitutes for a plurality of switch elements.
16. the resonance converter that possesses phase shift output route according to claim 14 is characterized in that the band centre tap circuit that wherein said synchronous rectification unit (7) constitutes for a plurality of switch elements.
17. the resonance converter that possesses phase shift output route according to claim 1 is characterized in that the full-bridge type rectification circuit that wherein said bridge rectifier unit (8) constitutes for a plurality of switch elements.
18. the resonance converter that possesses phase shift output route according to claim 1 is characterized in that half bridge rectifier that wherein said bridge rectifier unit (8) constitutes for a plurality of switch elements.
19. the resonance converter that possesses phase shift output route according to claim 18 is characterized in that polyphone one clamping capacitance (81) is to adjust the voltage level of this bridge rectifier unit (8) output between the switch element of wherein said bridge rectifier unit (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100001592A CN101777844B (en) | 2009-01-13 | 2009-01-13 | Resonant converter provided with phase shift output route |
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| CN2009100001592A CN101777844B (en) | 2009-01-13 | 2009-01-13 | Resonant converter provided with phase shift output route |
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| CN101777844B true CN101777844B (en) | 2012-04-25 |
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| TWI576680B (en) * | 2015-07-06 | 2017-04-01 | 台達電子工業股份有限公司 | Power converter |
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| EP2445098B1 (en) * | 2010-10-25 | 2019-08-07 | STMicroelectronics Srl | Control device for a resonant converter. |
| US20130329464A1 (en) * | 2012-06-06 | 2013-12-12 | System General Corp. | Digital power control circuit for power converter and control circuit for power converter |
| US11036269B2 (en) | 2014-09-02 | 2021-06-15 | Delta Electronics (Shanghai) Co., Ltd. | Power module and manufacturing method thereof |
| CN105449987B (en) | 2014-09-02 | 2019-06-25 | 台达电子工业股份有限公司 | Power supply device |
| US10447166B2 (en) | 2015-08-31 | 2019-10-15 | Delta Electronics, Inc. | Power module |
| CN109660125A (en) * | 2017-10-12 | 2019-04-19 | 首利实业股份有限公司 | The circuit structure of high power power power supply unit |
| CN108539982A (en) * | 2018-05-02 | 2018-09-14 | 石家庄通合电子科技股份有限公司 | A kind of two-way crisscross parallel LLC current equalizing methods and its circuit |
| CN109004702B (en) * | 2018-07-16 | 2021-10-26 | 成都安普利菲能源技术有限公司 | Battery partial pressure system that discharges |
| CN111654190B (en) * | 2019-03-04 | 2021-09-21 | 台达电子工业股份有限公司 | Resonant conversion device with extended hold time and method of operating the same |
| CN112054691B (en) * | 2020-09-04 | 2021-07-20 | 武汉大学 | Single-stage voltage-regulating conversion circuit sharing rectification structure and control method |
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| CN101777844A (en) | 2010-07-14 |
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