CN102064702A - Bidirectionally isolating type series resonance DC/DC converter - Google Patents
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Abstract
The invention relates to a bidirectionally isolating type series resonance DC/DC converter (100) which comprises voltage-stabilizing capacitors (22, 32), high-frequency converters (20, 50), series resonance circuits (30, 40), a high-frequency transformer (28) and an energy storage unit (60), wherein the voltage-stabilizing capacitors (22, 32) are used for enhancing the stability of a DC voltage; the high-frequency converters (20, 50) have the same structure and comprise four switching elements inversely connected in parallel with a rapid diode and can be used for inversion and rectification; the series resonance circuits are used for converting three kinds of discrete levels output by corresponding high-frequency converters into sinusoidal waveforms and can be used for softly switching the switching elements of the corresponding high-frequency converters, at the same time, only one series resonance circuit (30 or 40) acts; and the high-frequency transformer (28) can be used for isolation and transformation. The transformer (100) can be used for greatly converting the DC voltage, has high efficiency, and can be applied to an electric vehicle power supply, standby power supplies of large-scale equipment, and the like.
Description
Technical field
The present invention relates to a kind of DC/DC converter, particularly relate to a kind of two-way, isolated, based on the DC/DC converter of series resonance soft switch.
Background technology
Two-way DC/DC converter has a very wide range of applications in the stand-by power supply of the energy-recuperation system of electric automobile, powerful device, powerful device.Energy-storage travelling wave tube adopts ultracapacitor or storage battery, by two-way its charging of DC/DC convertor controls and discharge.
At present, two-way DC/DC converter topology is divided into isolated and non-isolated converter, the structure that isolated converter adopted is comparatively complicated, consider the cost problem, adopt the topological structure of non-isolated BUCK/BOOST mostly, be subjected to the restriction of topological structure, in the prior art, mainly there is the problem of two aspects in two-way DC/DC converter.The first, the gain of BOOST converter is generally on the low side, and usually less than 5, energy-storage units needs more series connection, increases numerous and diverse equalizer circuit, causes the reliability of entire equipment to reduce greatly; The second, the charging process of energy-storage units is wayward, overlong time, and influence useful life of energy-storage units.
Find by prior art documents, the Chinese invention patent application number is 200810040359.6 patent, patent name is: a kind of high-power bidirectional DC/DC converter topology structure, this patent comprises: high-pressure side filter unit, bridge arm unit, energy storage and low-pressure side filter unit, energy storage units, described high-pressure side filter unit, bridge arm unit, energy storage and low-pressure side filter unit, energy storage units connect successively, and described bridge arm unit comprises three switching devices.This invention is a kind ofly to be used for the high-power energy recuperation of direct current and to utilize the energy-saving equipment topology of occasion again, can prevent effectively under the failure condition that electric current is out of control, finish overcurrent protection rapidly, is applicable to the two-way high-power engineering of high reliability application scenario.The two-way DC/DC converter of this invention is non-isolated, the filter unit that needs the design both sides, comparatively loaded down with trivial details, if Design of Filter is unreasonable, both sides can interact, and increase the harmonic wave harm between the both sides, and the voltage transformation amplitude is less, energy-storage units adopts and is connected in series, and needs equalizer circuit, and the energy storage is slower.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency of the prior art, propose a kind of two-way isolated series resonance DC/DC converter.This converter device do not need the filter unit of both sides, and the voltage transformation amplitude is very big by high frequency transformer isolation, transformation, and energy-storage units can parallelly connect; Voltage response is rapid, and the charging and the discharge process of energy-storage units are fast controllable, greatly prolong its useful life; The switching device of converter can reduce even eliminate switching loss significantly based on the control of series resonance soft switch, and the efficient of converter is very high.
The present invention is achieved by the following technical solutions, the present invention includes: primary side voltage regulation capacitor, primary side high-frequency converter, primary side series resonant circuit, high frequency transformer, primary side series resonant circuit, primary side high-frequency converter, primary side voltage regulation capacitor, energy-storage units, wherein, high frequency transformer is used for isolating and transformation; Series resonant circuit is used for three kinds of discrete levels of corresponding high-frequency converter output are converted to sinusoidal waveform, and can be used for soft switch and control corresponding high-frequency converter switching device; The voltage regulation capacitor of both sides is used to strengthen the stability of direct voltage; The high-frequency converter structure of both sides is identical, is made up of the switching device of four inverse parallel fast diodes, can be used for inversion and rectification.
Described energy-storage units is storage battery, bank of super capacitors or other types electric energy accumulator spare, the voltage transformation amplitude of two-way DC/DC converter is very big, required primary side direct voltage is higher, when power is big, the voltage of energy-storage units also can be lower, can adopt parallel connection, greatly shorten the charging interval, do not need to increase the equalizer circuit of each energy-storage units.
Described two-way DC/DC converter can be divided into charging and discharge two states with the electric energy two-way flow.When energy-storage units was charged, the primary side high-frequency converter was in inverter mode, and the primary side series resonant circuit is in resonance condition; The primary side high-frequency converter is in rectification state, and four switching devices keep turn-offing, four fast diode effects, and the primary side series resonant circuit is not worked, and its resonant capacitor is used for filtering.During the energy-storage units discharge, the primary side high-frequency converter is in inverter mode, and the primary side series resonant circuit is in resonance condition; The primary side high-frequency converter is in rectification state, and four switching devices keep turn-offing, four fast diode effects, and the primary side series resonant circuit is not worked, and its resonant capacitor is used for filtering.
Described series resonant circuit is used for three kinds of discrete levels of corresponding high-frequency converter output are converted to sinusoidal waveform, and can be used for soft switch and control corresponding high-frequency converter switching device, the series resonant circuit of both sides is not worked simultaneously, one of them is used for resonance, and another resonant capacitor is used for filtering.Series resonant circuit is made up of the leakage inductance of extra resonance capacitor and high frequency transformer, if the leakage inductance deficiency, can outer coilloading, and the resonance frequency of primary side and primary side can be identical, also can be different, by resonant capacitor with add the adjustment of inductance resonance frequency.
Adopt the series resonance soft switch technique, when the direct current of a side was pressed with than great fluctuation process, it is stable that the output of opposite side still can keep, and the amplitude of accommodation of voltage is very big, and reduced switching loss.When the series resonant circuit effect of a side, the resonant capacitor of opposite side is used for filtering, and the value of selective resonance capacitor and the value of resonant inductance be at an order of magnitude, and the impedance of resonant capacitor that is used for filtering is less, and is very little to the landing influence of voltage.
When high-frequency converter is used for inversion, adopt the amplitude of regulating series resonance based on the compound modulation of series resonance soft switch and PWM serially, the continuable variation of the direct voltage of exporting after the uncontrollable rectification.
Described high-frequency converter comprises the switching device of 4 inverse parallel fast diodes, exportable just, the zero-sum negative level of the different conduction modes of 4 switches, the direction relations of the resonance current of 3 kinds of level and homonymy can be divided into three state, be respectively positive resonance, zero resonance and negative resonance, based on the control of series resonance soft switch is that the switching of every kind of state is the zero crossing at resonance current, thereby every kind of state action time be the integral multiple of half harmonic period, the switch periods during the high-frequency converter inversion also is the integral multiple of half harmonic period.Three kinds of resonance conditions are defined as: output level is zero, is zero resonance condition; Output level is identical all the time with direction of resonant current, is positive resonance condition; Output level is opposite all the time with direction of resonant current, is negative resonance condition.
The amplitude of series resonance can be by the level of output and the time control of level effect.In the harmonic period, direction of resonant current is opposite, each half period, and the output level of every kind of state is along with resonance current changes.During zero resonance, whole state output level is zero; Positive resonance or negative resonance condition must be two kinds of level of output in a harmonic period: positive level and negative level, the action time of positive level and negative level is identical.
PWM control is in half or a harmonic period positive resonance condition, negative resonance condition to be combined with zero resonance condition, by adjusting the width of output level the action time that changes positive resonance or negative resonance condition, positive resonance or negative resonance condition action time are t
On, be T modulation period, then duty ratio is t
On/ T.Three kinds of states are the control modes that disperse, and PWM control is a kind of successive control mode, three kinds of states are used for quick coarse tuning amplitude, PWM controls further accurate adjustment, both are in conjunction with realizing the amplitude of series resonance is carried out continuous control fast, and have only PWM control that switching loss is arranged, efficient is very high on the whole.
In half of resonance or one-period, the control mode that positive resonance condition and negative resonance condition combine is difficult to be realized, and available positive resonance condition or negative resonance condition combine with zero resonance condition and realize adjusting that it needs, so does not use this kind state of a control.
The needed amount of two-way DC/DC convertor controls is: primary side direct voltage, primary side resonance current, primary side resonant capacitor voltage, primary side resonant capacitor voltage, primary side resonance current and primary side direct voltage.Primary side resonance current and primary side resonance current are respectively the input and output electric currents of high frequency transformer, are linear relationship between the two, can only sample one of them; Condenser voltage is current related with it, thereby primary side resonant capacitor voltage and primary side resonant capacitor voltage, also is linear relationship between the two, can sample one of them.When two-way DC/DC converter is in the charge or discharge state, only need sampling primary side direct voltage, primary side direct voltage, resonance current and four amounts of resonance condenser voltage, do not increase with respect to the isolated needed sampling quantity of unidirectional DC/DC converter.Synchronization, the high-frequency converter of both sides only need get final product one control, and therefore, this isolated two-way DC/DC converter can not increase the complexity of its controller and sampling hardware circuit.
Compared with prior art, the present invention has following beneficial effect: the first, high frequency transformer is isolated both sides, and the voltage transformation amplitude is very big; The second, the energy storage monomer can adopt parallel-connection structure, and charging is rapid, and charging voltage and electric current can improve the useful life of energy-storage units fast according to the optimal charge curvilinear motion, and the voltage fluctuation during discharge does not influence the stability of output voltage; Three, during the high-frequency converter inversion based on series resonance soft switch control switch device, reduced switching loss, improved the efficient of two-way DC/DC converter; Four, because input, the output relation of transformer, the required sampling quantity of this controller does not increase, and the high-frequency converter of both sides do not need to control simultaneously, can not increase the complexity of controller and sampling hardware circuit thereof.
Description of drawings
Fig. 1 is for according to one embodiment of present invention;
Fig. 2 is the compound modulation of three kinds of states and PWM, the output level of 1-high-frequency converter, 2-resonance current.The I-positive status; II-bears state; The III-nought state; The IV-positive status, duty ratio 40% (be a harmonic period modulation period); V-bears state, duty ratio 40% (be a harmonic period modulation period).
Fig. 3 is the structure chart that two-way DC/DC converter is in charged state, and the switching device of primary side high-frequency converter turn-offs, and utilizes fast diode to make it to be in rectification state;
Fig. 4 is the structure chart that two-way DC/DC converter is in discharge condition, and the switching device of primary side high-frequency converter turn-offs, and utilizes fast diode to make it to be in rectification state.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment has provided detailed execution mode and process being to implement under the prerequisite with the technical solution of the present invention, but protection scope of the present invention is not limited to following embodiment.Therefore, should be understood that appended claim is intended to contain all such modifications and the change that falls into true spirit of the present invention.
As shown in Figure 1, present embodiment comprises: primary side voltage regulation capacitor 22, primary side high-frequency converter 20, primary side series resonant circuit 30, high frequency transformer 28, primary side series resonant circuit 40, primary side high-frequency converter 50, primary side voltage regulation capacitor 32 and energy-storage units 60, and wherein: capacitor 22 and 32 strengthens the stability of direct voltage; High- frequency converter 20 and 50 is used for high-frequency inversion or rectification, and operating state depends on the flow of electrical power direction of two-way DC/DC converter; Series resonant circuit 30 and 40 is used for three kinds of discrete levels are converted to sinusoidal waveform, so that transformer boosts or decompression transformation; The effect of high frequency transformer 28 is to isolate and voltage transformation; Energy-storage units 60 is used for storage or discharges electric energy.
High- frequency converter 20 and 50 adopts the mixing control based on series resonance soft switch and PWM.Exportable just, the zero-sum negative level of the different conduction modes of 4 switches, the direction relations of 3 kinds of level and resonance current can be divided into three state, be respectively positive resonance, zero resonance and negative resonance, be a harmonic period every kind of state action time, and the switching of every kind of state is the zero crossing at resonance current, thereby every kind of state action time be the integral multiple of half harmonic period, the switch periods during the high-frequency converter inversion also is the integral multiple of half harmonic period.Output level is zero, is zero resonance condition; Output level is identical all the time with direction of resonant current, is positive resonance condition; Output level is opposite all the time with direction of resonant current, is negative resonance.With high-frequency converter 20 is example, and during zero resonance condition, resonance current is for just, switching device 2 or 8 conductings, if switching device 2 conductings, diode 16 conductings and series resonant circuit 30 form the loop, if switching device 8 conductings, diode 14 conductings and series resonant circuit 30 form the loop; Resonance current is negative, switching device 4 or 6 conductings, if switching device 4 conductings, diode 18 conductings and series resonant circuit 30 form loops, if switching device 6 conductings, diode 12 conductings and series resonant circuit 30 formation loops.During positive resonance condition, high-frequency converter 20 injects electric energy to series resonant circuit 30, and resonance current is being for just, switching device 2 and 8 conductings; Resonance current is for bearing switching device 4 and 6 conductings.During negative resonance condition, the electric energy feedback in the series resonant circuit 30, switching device all turn-offs, and resonance current is being for just, diode 14 and 16 conductings; Resonance current is for bearing diode 12 and 18 conductings.
As shown in Figure 2, the control mode of high-frequency converter 20, the amplitude of series resonance can be by the level of output and the time control of level effect.In the harmonic period of three kinds of State Control, the inevitable direction of resonance current is opposite, each half period, and the output level of every kind of state is inevitable along with resonance current changes.During zero resonance condition, whole state output level is zero; Positive resonance or negative resonance condition must be two kinds of level of output in a harmonic period: positive level and negative level, the action time of positive level and negative level is identical.PWM control is in a harmonic period positive resonance or negative resonance condition to be combined with zero resonance condition, and by adjusting the width of output level the action time that changes positive resonance or negative resonance condition, just resonance or negative resonance condition action time are t
On, harmonic period is T, then duty ratio is t
On/ T, and duty ratio changes in 0～50%.Three kinds of states are the control modes that disperse, and PWM control is a kind of successive control mode, and both are in conjunction with realizing the amplitude of series resonance is carried out continuous control.
Energy-storage units 60 is storage battery, bank of super capacitors, the voltage transformation amplitude of two-way DC/DC converter 100 is very big, required primary side direct voltage is higher, when power is big, the voltage of energy-storage units 60 also can be lower, can adopt parallel connection, greatly shorten the charging interval, do not need to increase the equalizer circuit of each energy storage monomer.
Two-way DC/DC converter 100 can be divided into charging and discharge two states with the electric energy two-way flow.Shown in Figure 3, during to energy-storage units 60 chargings, primary side high-frequency converter 20 is in inverter mode, and primary side series resonant circuit 30 is in resonance condition; Primary side high-frequency converter 50 is in rectification state, and four switching devices 42,44,46 and 48 keep turn-offing, four fast diodes 52,54,56 and 58 effects, and primary side series resonant circuit 40 is not worked, and its resonant capacitor 34 is used for filtering.Shown in Figure 4, during energy-storage units 60 discharges, primary side high-frequency converter 50 is in inverter mode, and primary side series resonant circuit 40 is in resonance condition; Primary side high-frequency converter 20 is in rectification state, and four switching devices 2,4,6 and 8 keep turn-offing, four fast diodes 12,14,16 and 18 effects, and primary side series resonant circuit 30 is not worked, and its resonant capacitor 24 is used for filtering.
Series resonant circuit 30 is made up of the leakage inductance of capacitor 24 and high frequency transformer 28, if the leakage inductance deficiency, and can outer coilloading; Series resonant circuit 40 is made up of the leakage inductance of capacitor 34 and high frequency transformer 28, if the leakage inductance deficiency, can outer coilloading.During energy-storage units 60 chargings, series resonant circuit 30 effects, by the resonance amplitude of high-frequency converter 20 control resonant circuits 30, this moment, resonant circuit 40 did not act on, and capacitor 34 only plays the effect of filtering; During energy-storage units 60 discharges, series resonant circuit 40 effects, by the resonance amplitude of high-frequency converter 50 control resonant circuits 40, this moment, resonant circuit 30 did not act on, and capacitor 24 only plays the effect of filtering.
The capacitance of primary side resonant circuit 30 is C
1, inductance value is L
1, the capacitance of primary side resonant circuit 40 is C
2, inductance value is L
2, the primary side resonance frequency omega
1For
The primary side resonance frequency omega
2For
When the capacitor 24 in the primary side resonant circuit 30 was used as filtering, its impedance was 1/ ω
2C
1, be
When the capacitor 34 in the primary side resonant circuit 40 was used as filtering, its impedance was 1/ ω
1C
2, be
During the capacity of selective resonance capacitor and inductance, as long as guarantee to be in an order of magnitude, just can guarantee that the impedance when resonant capacitor is used for filtering is less, the pressure drop affects that causes is very little, and capacitor itself can consumed power, therefore be not used in resonance, and it is very little to the influence of two-way DC/DC converter to be used for the capacitor of filtering.
The needed amount of two-way DC/DC converter 100 controls is: primary side direct voltage U
1, primary side resonance current 25, the voltage of primary side resonant capacitor 24, voltage, primary side resonance current 35 and the primary side direct voltage U of primary side resonant capacitor 34
2Primary side resonance current 25 and primary side resonance current 35 are respectively the input and output electric currents of high frequency transformer 28, are linear relationship between the two, can only sample one of them; The voltage of capacitor is current related with it, thereby the voltage of the voltage of primary side resonant capacitor 24 and primary side resonant capacitor 34, also is linear relationship between the two, can sample one of them.When two-way DC/DC converter 100 is in the charge or discharge state, only need sampling primary side direct voltage U
1, primary side direct voltage U
2, the resonance current of one of them and four amounts of resonance condenser voltage, do not increase with respect to the isolated needed sampling quantity of unidirectional DC/DC converter.Synchronization, the high-frequency converter of both sides only need get final product one control, and therefore, this isolated two-way DC/DC converter 100 can not increase the complexity of its controller and sampling hardware circuit.
The element tabulation
(2) switching device
(4) switching device
(6) switching device
(8) switching device
(12) fast diode
(14) fast diode
(16) fast diode
(18) fast diode
(20) primary side high-frequency converter
(22) primary side voltage regulation capacitor
(24) primary side resonant capacitor
(25) primary side resonance current
(28) high-frequency isolation transformer
(30) primary side series resonant circuit
(32) primary side voltage regulation capacitor
(34) primary side resonant capacitor
(35) primary side resonance current
(40) primary side series resonant circuit
(42) switching device
(44) switching device
(46) switching device
(48) switching device
(50) primary side high-frequency converter
(52) fast diode
(54) fast diode
(56) fast diode
(58) fast diode
(60) energy-storage units
Claims (9)
1. two-way, isolated, series resonance DC/DC converter (100), comprise: voltage regulation capacitor (22,32), high-frequency converter (20,50), series resonant circuit (30,40), high frequency transformer (28), energy-storage units (60), wherein, voltage regulation capacitor (22,32) is used to strengthen the stability of direct voltage; High-frequency converter (20) is identical with (50) structure, is made up of the switching device of four inverse parallel fast diodes, can be used for inversion and rectification; Series resonant circuit is used for three kinds of discrete levels of corresponding high-frequency converter output are converted to sinusoidal waveform, and can be used for soft switch and control corresponding high-frequency converter switching device, and synchronization has only a series resonant circuit effect (30 or 40); High frequency transformer (28) is used for isolating and transformation.
2. two-way DC/DC converter according to claim 1 (100), it is characterized in that, energy-storage units (60) is storage battery, bank of super capacitors or other types electric energy accumulator spare, the voltage transformation amplitude of two-way DC/DC converter is very big, energy-storage units (60) can adopt parallel connection, greatly shorten the charging interval, do not need to increase the equalizer circuit of each energy-storage units.
3. two-way DC/DC converter according to claim 1 (100), it is characterized in that, can be with the electric energy two-way flow, be divided into charging and discharge two states, when energy-storage units (60) is charged, primary side high-frequency converter (20) is in inverter mode, primary side series resonant circuit (30) is in resonance condition, primary side high-frequency converter (50) is in rectification state, four switching devices keep turn-offing, four fast diode effects, primary side series resonant circuit (40) is not worked, and its resonant capacitor (34) is used for filtering; During energy-storage units (60) discharge, primary side high-frequency converter (50) is in inverter mode, primary side series resonant circuit (40) is in resonance condition, primary side high-frequency converter (20) is in rectification state, four switching devices keep turn-offing, four fast diode effects, primary side series resonant circuit (30) is not worked, and its resonant capacitor (24) is used for filtering.
4. two-way DC/DC converter according to claim 1 (100), it is characterized in that, series resonant circuit (30) is made up of the extra resonance capacitor (24) and the leakage inductance of high frequency transformer (28), series resonant circuit (40) is made up of the extra resonance capacitor (34) and the leakage inductance of high frequency transformer (28), if leakage inductance deficiency, can outer coilloading, the resonance frequency of series resonant circuit (30) and (40) can be identical, also can be different, by resonant capacitor with add the adjustment of inductance resonance frequency, do not work simultaneously in series resonant circuit (30) and (40), one of them is used for resonance, and another resonant capacitor is used for filtering, and the value of selective resonance capacitor and the value of resonant inductance are at an order of magnitude, the impedance of resonant capacitor that is used for filtering is less, and is very little to the landing influence of voltage.
5. two-way DC/DC converter according to claim 1 (100), it is characterized in that, high-frequency converter (20 or 50) is when being used for inversion, employing is regulated the amplitude of series resonance, the continuable variation of the direct voltage of exporting after the uncontrollable rectification serially based on the compound modulation of series resonance soft switch and PWM.
6. two-way DC/DC converter according to claim 5 (100), it is characterized in that, high-frequency converter (20 or 50) comprises the switching device of four inverse parallel fast diodes, the different conduction modes of four switches are just exportable, the zero-sum negative level, the direction relations of the resonance current of three kinds of level and homonymy can be divided into three kinds of states, be respectively positive resonance, zero resonance and negative resonance, based on the control of series resonance soft switch is that the switching of every kind of state is the zero crossing at resonance current, thereby be the integral multiple of half harmonic period every kind of state action time, switch periods during high-frequency converter (20 or 50) inversion also is the integral multiple of half harmonic period, three kinds of resonance conditions are defined as: output level is zero, is zero resonance condition; Output level is identical all the time with direction of resonant current, is positive resonance condition; Output level is opposite all the time with direction of resonant current, is negative resonance condition.
7. two-way DC/DC converter according to claim 5 (100), it is characterized in that, the amplitude of series resonance can be by the level of output and the time control of level effect, in the harmonic period, direction of resonant current is opposite, each half period, the output level of every kind of state is along with resonance current changes, during zero resonance, whole state output level is zero, positive resonance or negative resonance condition must be two kinds of level of output in a harmonic period: positive level and negative level, the action time of positive level and negative level is identical.
8. two-way DC/DC converter according to claim 5 (100), it is characterized in that, PWM control is in half or a harmonic period positive resonance condition, negative resonance condition to be combined with zero resonance condition, by adjusting the width of output level the action time of controlling positive resonance or negative resonance condition, positive resonance or negative resonance condition action time are t
On, be T modulation period, then duty ratio is t
On/ T.Three kinds of states are the control modes that disperse, and PWM control is a kind of successive control mode, three kinds of states are used for quick coarse tuning amplitude, PWM controls further accurate adjustment, both are in conjunction with realizing the amplitude of series resonance is carried out continuous control fast, control based on the series resonance soft switch can be eliminated switching loss, has only PWM control that switching loss is arranged, and efficient is very high on the whole.
9. two-way DC/DC converter according to claim 1 (100) is characterized in that, controls needed amount to be: primary side direct voltage U
1, primary side resonance current (25), the voltage of primary side resonant capacitor (24), voltage, primary side resonance current (35) and the primary side direct voltage U of primary side resonant capacitor (34)
2, that can do is reduced to: primary side resonance current (25) and primary side resonance current (35) are respectively the input and output electric currents of high frequency transformer (28), are linear relationship between the two, can only sample one of them; Condenser voltage is current related with it, thereby the voltage of the voltage of primary side resonant capacitor (24) and primary side resonant capacitor (34), also be linear relationship between the two, can sample one of them, when two-way DC/DC converter (100) is in the charge or discharge state, only need sampling primary side direct voltage U
1, primary side direct voltage U
2, the resonance current of one of them and four amounts of resonance condenser voltage, do not increase with respect to the isolated needed sampling quantity of unidirectional DC/DC converter, synchronization, the high-frequency converter of both sides only need get final product one control, therefore, this isolated two-way DC/DC converter (100) can not increase the complexity of its controller and sampling hardware circuit.
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Cited By (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185480A (en) * | 2011-04-13 | 2011-09-14 | 中电普瑞科技有限公司 | Bidirectional isolation direct-current converter |
| CN102201739A (en) * | 2011-05-27 | 2011-09-28 | 华北电力大学（保定） | Symmetrical half-bridge LLC resonant bidirectional DC-DC converter |
| CN102723870A (en) * | 2012-06-21 | 2012-10-10 | 中国矿业大学(北京) | Input-series and output-series full-bridge high-frequency isolated bidirectional direct current / direct current (DC/DC) converter |
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