CN106685235A - Bidirectional DC/DC power converter - Google Patents
Bidirectional DC/DC power converter Download PDFInfo
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- CN106685235A CN106685235A CN201710079584.XA CN201710079584A CN106685235A CN 106685235 A CN106685235 A CN 106685235A CN 201710079584 A CN201710079584 A CN 201710079584A CN 106685235 A CN106685235 A CN 106685235A
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- Prior art keywords
- rectification
- circuit
- pass switch
- resonance
- res1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33584—Bidirectional converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The present invention relates to a bidirectional DC/DC power converter. In the convertor, a first resonance circuit at the left side and a second resonance circuit at the right side are respectively connected in parallel to bypass switches. When the power is transmitted forwards, a resonant inductor and a resonant capacitor in the second resonance circuit are bypassed; when the power is transmitted backwards, a resonant inductor and a resonant capacitor in the first resonance circuit are bypassed. Therefore, the inductive loss and the capacitive loss can be reduced, the efficiency of the energy transmission can be improved, and the influence of the parasitic parameters can be inhibited to a certain degree. Whatever is the forward direction or the reverse direction of the topology, when the power is transmitted, the frequency gain curve is monotonous to ensure the controllability of the system and facilitate the design of the feedback loop.
Description
Technical field
The present invention relates to converters field, and in particular to a kind of two-way DC/DC (DC-DC) power conversion
Device.
Background technology
Simple reversible transducer is by two full-bridges or half-bridge circuit is mutually symmetrical constitutes, and it implements more letter
It is single, but shortcoming is also apparent from, and the switching tube on both sides all works in hard switching pattern, EMI (Electromagnetic
Interference, electromagnetic interference) characteristic and efficiency all seems relatively poor, by taking LLC resonant converter as an example, Traditional control side
Case is it is operated in lower resonance region, slightly below resonant frequency, such primary side MOS (Metal-Oxide-Semiconductor,
Metal oxide semiconductor) diode of pipe and secondary can realize that no-voltage is opened or zero point stream is closed, efficiency is relative
In it is hard open pattern and have greatly improve, if secondary side diode changes metal-oxide-semiconductor into, work in synchronous rectification pattern, then effect
Rate can be improved further.
Existing patent document CN104993707 (denominations of invention：The controlling party of the two-way DC/DC converters based on LLC resonance
Method, date of publication：2015.10.21) as shown in figure 1, the patent describes the reversible transducer based on LLC topologys, do not increasing
In the case of component, by giving a kind of control program in the text so that during power reverse transfer, i.e., be transferred to from right side
During left side, gain can be more than 1, but the program when not solving reverse transfer right-side switch pipe work in hard switching pattern
Problem, so as to cause efficiency comparison low.
The content of the invention
In order to solve above mentioned problem of the prior art, the present invention proposes a kind of two-way DC/DC power inverters, improves
The efficiency of energy transmission, and suppress the influence of parasitic parameter to a certain extent.
The present invention proposes a kind of two-way DC/DC power inverters, including the first rectification/inverter circuit, the first resonance circuit,
Transformer, the second rectification/inverter circuit, first resonance circuit are arranged at the AC of the first rectification/inverter circuit；Also wrap
Include the second resonance circuit, and by-pass switch group；
The DC side of first rectification/inverter circuit is the power input/output end of the power inverter, corresponding
The DC side of the second rectification/inverter circuit is the power supply input/output end of the power inverter；
Second resonance circuit is arranged at the AC of the second rectification/inverter circuit；
The by-pass switch group, is configured in forward direction conveying power, by the bypass of the second resonance circuit；In reversely conveying work(
During rate, by the bypass of the first resonance circuit.
Preferably, the by-pass switch group includes：First by-pass switch and the second by-pass switch；
First by-pass switch is in parallel with first resonance circuit；
Second by-pass switch is in parallel with second resonance circuit.
Preferably, during positive conveying power, first rectification/inverter circuit works in high-frequency inversion pattern, and described the
Two rectifications/inverter circuit works in high-frequency rectification pattern；First by-pass switch is cut-off state, second by-pass switch
It is conducting state.
Preferably, reversely conveying power when, second rectification/inverter circuit works in high-frequency inversion pattern, described the
One rectification/inverter circuit works in high-frequency rectification pattern；First by-pass switch is conducting state, second by-pass switch
It is cut-off state.
Preferably, during positive conveying power, the switching frequency selection of the first rectification/inverter circuit is attached in circuit resonance point
Closely.
Preferably, when reversely conveying power, the switching frequency selection of the second rectification/inverter circuit is attached in circuit resonance point
Closely.
Preferably, first resonance circuit, including resonant inductance Lres1With resonant capacitance Cres1, Lres1And Cres1Series connection；
Second resonance circuit, including resonant inductance Lres2With resonant capacitance Cres2, Lres2And Cres2Series connection；
One end of first rectification/inverter circuit AC is being sequentially connected in series Lres1、Cres1Afterwards with the one of transformer primary side
End is connected；First rectification/other end of inverter circuit AC is connected with the other end of transformer primary side；
One end of second rectification/inverter circuit AC and Cres2、Lres2It is sequentially connected in series the one of rear and transformer secondary
End is connected；Second rectification/other end of inverter circuit AC is connected with the other end of transformer secondary；
First by-pass switch, with Lres1、Cres1The series circuit of composition is in parallel；
Second by-pass switch, with Lres2、Cres2The series circuit of composition is in parallel.
Preferably, during positive conveying power, the switching frequency of the first rectification/inverter circuit is selected in the first resonance circuit
Lower resonance range, less than resonance point 1/sqrt (Lres1*Cres1), but higher than resonance point 1/sqrt ((Lres1+Lm)*Cres1)), wherein
LmIt is the magnetizing inductance of transformer.
Preferably, when reversely conveying power, the switching frequency of the second rectification/inverter circuit is selected in the second resonance circuit
Lower resonance range, less than resonance point 1/sqrt (Lres2*Cres2), but higher than resonance point 1/sqrt ((Lres2+Lm)*Cres2)), wherein
LmIt is the magnetizing inductance of transformer.
Preferably, also including by-pass switch group control unit, the unit is configured to the power transmission according to the converter
Direction, control by-pass switch group bypass the first resonance circuit or the second resonance circuit.
Preferably, first by-pass switch and second by-pass switch are by the bypass circuit structure comprising switching tube
Into.
Preferably, first by-pass switch, by two switching tube S5、S6Differential concatenation is constituted, S5Source electrode connection S6's
Source electrode；By S5Drain electrode and S6Drain electrode be coupled with L in the first resonance circuitres1、Cres1The two ends of series circuit；
Or by S5And S6One diode of each differential concatenation, then compose in parallel；S5Source electrode connection diode D5Just
Pole, S6Source electrode connection diode D6Positive pole, S5Drain electrode connection diode D6Negative pole, S6Drain electrode connection diode D5's
Negative pole；By S5Drain electrode and S6Drain electrode be coupled with L in the first resonance circuitres1、Cres1The two ends of series circuit.
Preferably, second by-pass switch, by two switching tube S7、S8Differential concatenation is constituted, S7Source electrode connection S8's
Source electrode；By S7Drain electrode and S8Drain electrode be coupled with L in the second resonance circuitres2、Cres2The two ends of series circuit；
Or by S7And S8One diode of each differential concatenation, then compose in parallel；S7Source electrode connection diode D7Just
Pole, S7Source electrode connection diode D7Positive pole, S8Drain electrode connection diode D8Negative pole, S8Drain electrode connection diode D8's
Negative pole is by S7Drain electrode and S8Drain electrode be coupled with L in the second resonance circuitres2、Cres2The two ends of series circuit.
Preferably, first by-pass switch and the second by-pass switch are relay.
Preferably, first rectification/inverter circuit, is full-bridge or half bridge switching circuit.
Preferably, second rectification/inverter circuit, is full-bridge or half bridge switching circuit.
Preferably, the switching tube of first by-pass switch and second by-pass switch is constituted, is MOSFET (Metal
Oxide Semiconductor Field Effect Transistor, MOS type FET), IGBT
(Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), SIC (SIlicon Carbide, carbon
SiClx) or GAN (GAllium Nitride, gallium nitride) switching tube in any one.
In converter of the invention, in forward direction conveying power, by resonant inductance and resonance in the second resonance circuit
Capacitive bypass is fallen；Reversely during conveying power, the resonant inductance in the first resonance circuit and resonance capacitive bypass are fallen；Do so,
Perception loss and capacitive loss can be reduced, the efficiency of energy transmission is improve, and suppress parasitic parameter to a certain extent
Influence.No matter positive topology of the invention is or reversely, when power transmission is carried out, its frequency gain curve be all it is dull,
The controllability of system is ensure that, beneficial to the design of feedback control loop.
Scheme 1, a kind of two-way DC/DC power inverters, including the first rectification/inverter circuit, the first resonance circuit, transformer,
Second rectification/inverter circuit, first resonance circuit is arranged at the AC of the first rectification/inverter circuit；Characterized in that,
Also include the second resonance circuit, and by-pass switch group；
The DC side of first rectification/inverter circuit is the power input/output end of the power inverter, corresponding second
The DC side of rectification/inverter circuit is the power supply input/output end of the power inverter；
Second resonance circuit is arranged at the AC of the second rectification/inverter circuit；
The by-pass switch group, is configured in forward direction conveying power, by the bypass of the second resonance circuit；In reversely conveying power
When, by the bypass of the first resonance circuit.
Scheme 2, the converter according to scheme 1, it is characterised in that the by-pass switch group includes：First by-pass switch and
Second by-pass switch；
First by-pass switch is in parallel with first resonance circuit；
Second by-pass switch is in parallel with second resonance circuit.
Scheme 3, the converter according to scheme 2, it is characterised in that during forward direction conveying power, first rectification/inversion electricity
Road works in high-frequency inversion pattern, and second rectification/inverter circuit works in high-frequency rectification pattern；First by-pass switch
It is cut-off state, second by-pass switch is conducting state.
Scheme 4, the converter according to scheme 3, it is characterised in that reversely during conveying power, second rectification/inversion electricity
Road works in high-frequency inversion pattern, and first rectification/inverter circuit works in high-frequency rectification pattern；First by-pass switch
It is conducting state, second by-pass switch is cut-off state.
Scheme 5, the converter according to scheme 4, it is characterised in that during forward direction conveying power, the first rectification/inverter circuit
Switching frequency is selected near circuit resonance point.
Scheme 6, the converter according to scheme 5, it is characterised in that reversely during conveying power, the second rectification/inverter circuit
Switching frequency is selected near circuit resonance point.
Scheme 7, the converter according to scheme 6, it is characterised in that：
First resonance circuit, including resonant inductance Lres1With resonant capacitance Cres1, Lres1And Cres1Series connection；
Second resonance circuit, including resonant inductance Lres2With resonant capacitance Cres2, Lres2And Cres2Series connection；
One end of first rectification/inverter circuit AC is being sequentially connected in series Lres1、Cres1Afterwards with one end of transformer primary side
It is connected；First rectification/other end of inverter circuit AC is connected with the other end of transformer primary side；
One end of second rectification/inverter circuit AC and Cres2、Lres2It is sequentially connected in series one end of rear and transformer secondary
It is connected；Second rectification/other end of inverter circuit AC is connected with the other end of transformer secondary；
First by-pass switch, with Lres1、Cres1The series circuit of composition is in parallel；
Second by-pass switch, with Lres2、Cres2The series circuit of composition is in parallel.
Scheme 8, the converter according to scheme 7, it is characterised in that during forward direction conveying power, the first rectification/inverter circuit
Switching frequency selects the lower resonance range in the first resonance circuit, less than resonance point 1/sqrt (Lres1*Cres1), but higher than resonance
Point 1/sqrt ((Lres1+Lm)*Cres1)), wherein LmIt is the magnetizing inductance of transformer.
Scheme 9, the converter according to scheme 8, it is characterised in that reversely during conveying power, the second rectification/inverter circuit
Switching frequency selects the lower resonance range in the second resonance circuit, less than resonance point 1/sqrt (Lres2*Cres2), but higher than resonance
Point 1/sqrt ((Lres2+Lm)*Cres2)), wherein LmIt is the magnetizing inductance of transformer.
Scheme 10, the converter according to any one of scheme 2~9, it is characterised in that also controlled including by-pass switch group single
Unit, the unit is configured to the power transmission direction according to the converter, control by-pass switch group bypass the first resonance circuit or
Second resonance circuit.
Scheme 11, the converter according to scheme 10, it is characterised in that first by-pass switch and second bypass are opened
Close and constituted by the bypass circuit comprising switching tube.
Scheme 12, the converter according to scheme 11, it is characterised in that first by-pass switch, by two switching tube S5、
S6Differential concatenation is constituted, S5Source electrode connection S6Source electrode；By S5Drain electrode and S6Drain electrode be coupled with the first resonance circuit
Lres1、Cres1The two ends of series circuit；
Or by S5And S6One diode of each differential concatenation, then compose in parallel；S5Source electrode connection diode D5Positive pole, S6
Source electrode connection diode D6Positive pole, S5Drain electrode connection diode D6Negative pole, S6Drain electrode connection diode D5Negative pole；
By S5Drain electrode and S6Drain electrode be coupled with L in the first resonance circuitres1、Cres1The two ends of series circuit.
Scheme 13, the converter according to scheme 12, it is characterised in that second by-pass switch, by two switching tube S7、
S8Differential concatenation is constituted, S7Source electrode connection S8Source electrode；By S7Drain electrode and S8Drain electrode be coupled with the second resonance circuit
Lres2、Cres2The two ends of series circuit；
Or by S7And S8One diode of each differential concatenation, then compose in parallel；S7Source electrode connection diode D7Positive pole, S7
Source electrode connection diode D7Positive pole, S8Drain electrode connection diode D8Negative pole, S8Drain electrode connection diode D8Negative pole
By S7Drain electrode and S8Drain electrode be coupled with L in the second resonance circuitres2、Cres2The two ends of series circuit.
Scheme 14, the converter according to scheme 10, it is characterised in that first by-pass switch and the second by-pass switch are
Relay.
Scheme 15, the converter according to any one of scheme 1~9, it is characterised in that first rectification/inverter circuit,
It is full-bridge or half bridge switching circuit.
Scheme 16, the converter according to any one of scheme 1~9, it is characterised in that second rectification/inverter circuit,
It is full-bridge or half bridge switching circuit.
Scheme 17, the converter according to scheme 11, it is characterised in that by composition first by-pass switch and described second
The switching tube of way switch, is any one in MOSFET, IGBT, SIC or GAN switching tube.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of reversible transducer in existing patent document CN104993707；
Fig. 2 is the reversible transducer circuit theory diagrams in the present embodiment；
Fig. 3 (a)~Fig. 3 (c) is 3 kinds of optional by-pass switch structure principle charts in the present invention；
Fig. 4 is oscillogram of the reversible transducer in forward direction conveying power in the present embodiment；
Fig. 5 is oscillogram of the reversible transducer in reversely conveying power in the present embodiment.
Specific embodiment
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little implementation methods are used only for explaining know-why of the invention, it is not intended that limit the scope of the invention.
The present invention proposes a kind of two-way DC/DC power inverters, as shown in Fig. 2 including the first rectification/inverter circuit, the
One resonance circuit, transformer, the second rectification/inverter circuit, first resonance circuit are arranged at the first rectification/inverter circuit
AC；Additionally, also include the second resonance circuit, and by-pass switch group；
First rectification/inverter circuit is full-bridge circuit, including switching tube S1、S2、S3And S4；Second rectification/inverse
It is also full-bridge circuit to become circuit, including switching tube S9、S10、S11And S12；When the positive conveying power of the power inverter, institute
The DC side of the first rectification/inverter circuit is stated as input, the DC side of second rectification/inverter circuit is used as output
End；When the power inverter reversely conveys power, the DC side of first rectification/inverter circuit is used as output end, institute
The DC side of the second rectification/inverter circuit is stated as input；
Second resonance circuit is arranged at the AC of the second rectification/inverter circuit；
The by-pass switch group, is configured in forward direction conveying power, by the bypass of the second resonance circuit；In reversely conveying work(
During rate, by the bypass of the first resonance circuit.
In the present embodiment, the by-pass switch group includes：First by-pass switch and the second by-pass switch；
First by-pass switch is in parallel with first resonance circuit；
Second by-pass switch is in parallel with second resonance circuit.
In the present embodiment, during forward direction conveying power, first rectification/inverter circuit works in high-frequency inversion pattern, institute
State the second rectification/inverter circuit and work in high-frequency rectification pattern；First by-pass switch is cut-off state, second bypass
It is conducting state to switch.
In the present embodiment, reversely during conveying power, second rectification/inverter circuit works in high-frequency inversion pattern, institute
State the first rectification/inverter circuit and work in high-frequency rectification pattern；First by-pass switch is conducting state, second bypass
It is cut-off state to switch.
In Fig. 2, CpIt is transformer primary side parasitic capacitance, CsIt is transformer secondary parasitic capacitance.During forward direction conveying power, become
The magnetizing inductance L of depressormPositioned at primary side, reversely during conveying power, the magnetizing inductance L of transformermPositioned at secondary.
First resonance circuit, including resonant inductance Lres1With resonant capacitance Cres1, Lres1And Cres1Series connection；Described
Two resonance circuits, including resonant inductance Lres2With resonant capacitance Cres2, Lres2And Cres2Series connection；
One end of first rectification/inverter circuit AC is being sequentially connected in series Lres1、Cres1Afterwards with the one of transformer primary side
End is connected；First rectification/other end of inverter circuit AC is connected with the other end of transformer primary side；
One end of second rectification/inverter circuit AC and Cres2、Lres2It is sequentially connected in series the one of rear and transformer secondary
End is connected；Second rectification/other end of inverter circuit AC is connected with the other end of transformer secondary；
First by-pass switch, by two MOSFET pipes S5、S6It is reversely connected in series to form, with Lres1、Cres1The series connection of composition
Circuit in parallel；
Second by-pass switch, by two MOSFET pipes S7、S8It is reversely connected in series to form, with Lres2、Cres2The series connection of composition
Circuit in parallel.
In the present embodiment, also including by-pass switch group control unit, the unit is configured to the power according to the converter
Transmission direction, control by-pass switch group bypass the first resonance circuit or the second resonance circuit.
First by-pass switch and second by-pass switch are constituted by the bypass circuit comprising switching tube.Wherein
There is a damper diode between the source electrode of switch mosfet pipe and drain electrode, switch triode can be played a protective role.
In the present embodiment, during forward direction conveying power, first rectification/inverter circuit works in high-frequency inversion pattern, institute
State the second rectification/inverter circuit and work in high-frequency rectification pattern；Power is by the dc source V1It is transported to the dc source
V2, by controlling the drive signal of first by-pass switch and second by-pass switch, allow at first by-pass switch
It is in the conduction state in cut-off state, second by-pass switch；So as to the second resonance circuit be bypassed, make the first resonance electric
Road normal work.
Oscillogram during forward direction conveying power is as shown in Figure 4：
Vgs1And Vgs2Respectively S1And S2Drive signal, S4And S1Using identical drive signal, S3And S2Using identical
Drive signal, Vgs1And Vgs2Dutycycle is 50%, and complementary；Vgs7It is S7And S8Drive signal, it can be by described
By-pass switch group control unit sends independent digital switch signal, or will by the by-pass switch group control unit
Vgs1And Vgs2Do or computing obtained by signal；Vgs5It is S5And S6Drive signal, it can be controlled single by the by-pass switch group
Unit sends independent digital switch signal, or by the by-pass switch group control unit by Vgs1And Vgs2Do and computing institute
The signal for obtaining；Switching tube S5And S6Cut-off state is in this operation mode, it is ensured that first resonance circuit can be with correct
Mode work in combination, be inverter circuit (S1~S4) and rectification circuit (S9~S12) enough energy is provided realizes ZVS (Zero
Voltage Switch, ZVT) or ZCS (Zero Current Switch, Zero Current Switch).Simultaneous Switching pipe
S7And S8It is in the conduction state, bypass the resonant inductance L in second resonance circuitres2With resonant capacitance Cres2, to reduce
Perception loss and capacitive loss.
VABFor the voltage at A, B two ends, I are surveyed in the exchange of first rectification/inverter circuitres1It is Lres1And Cres1On electricity
Stream, ILmIt is static exciter inductance LmOn electric current.Vds1And Vds2Respectively S1And S2Drain electrode and source electrode between voltage, Ids1
And Ids2Respectively S1And S2On electric current；Ids9And Ids10Respectively S9And S10On electric current.
In the present embodiment, reversely during conveying power, second rectification/inverter circuit works in high-frequency inversion pattern, institute
State the first rectification/inverter circuit and work in high-frequency rectification pattern；Power is by the dc source V2It is transported to the dc source
V1, by controlling the drive signal of first by-pass switch and second by-pass switch, allow at first by-pass switch
Cut-off state is in conducting state, second by-pass switch；So as to the first resonance circuit be bypassed, make the second resonance electric
Road normal work.
Oscillogram reversely during conveying power is as shown in Figure 5：
Vgs9And Vgs10Respectively S9And S10Drive signal, S12And S9Using identical drive signal, S11And S10Using phase
Same drive signal, Vgs9And Vgs10Dutycycle is 50%, and complementary；Vgs5It is S5And S6Drive signal, it can be by institute
State the independent digital switch signal of by-pass switch group control unit transmission, or incited somebody to action by the by-pass switch group control unit
Vgs9And Vgs10Do or computing obtained by signal；Vgs7It is S7And S8Drive signal, it can be controlled single by the by-pass switch group
Unit sends independent digital switch signal, or by the by-pass switch group control unit by Vgs9And Vgs10Do and computing
The signal of gained；Switching tube S7And S8In this operation mode all in cut-off state, it is ensured that second resonance circuit can be with
Correct mode work in combination, is inverter circuit (S9~S12) and rectification circuit (S1~S4) provide enough energy realize ZVS or
Person ZCS.Simultaneous Switching pipe S5And S6It is in the conduction state, bypass the resonant inductance L in first resonance circuitres1It is harmonious
Shake electric capacity Cres1, it is lost with reducing perception loss and capacitive.
VCDFor the voltage at C, D two ends, I are surveyed in the exchange of second rectification/inverter circuitres2It is Lres2And Cres2On electricity
Stream, ILmIt is static exciter inductance LmOn electric current.Vds9And Vds10Respectively S9And S10Drain electrode and source electrode between voltage,
Ids9And Ids10Respectively S9And S10On electric current；Ids1And Ids2Respectively S1And S2On electric current.
In the present embodiment, during forward direction conveying power, the switching frequency of the first rectification/inverter circuit is selected in circuit resonance point
Near.
In the present embodiment, reversely during conveying power, the switching frequency of the second rectification/inverter circuit is selected in circuit resonance point
Near.
In the present embodiment, during forward direction conveying power, the switching frequency selection of the first rectification/inverter circuit is in the first resonance electricity
The lower resonance range on road, less than resonance point 1/sqrt (Lres1*Cres1), but higher than resonance point 1/sqrt ((Lres1+Lm)*Cres1)),
Wherein LmIt is the magnetizing inductance of transformer.
In the present embodiment, reversely during conveying power, the switching frequency selection of the second rectification/inverter circuit is in the second resonance electricity
The lower resonance range on road, less than resonance point 1/sqrt (Lres2*Cres2), but higher than resonance point 1/sqrt ((Lres2+Lm)*Cres2)),
Wherein LmIt is the magnetizing inductance of transformer.
In the present embodiment, first by-pass switch, shown in such as Fig. 3 (a), by two switching tube S5、S6Differential concatenation group
Into S5Source electrode connection S6Source electrode；By S5Drain electrode and S6Drain electrode be coupled with L in the first resonance circuitres1、Cres1Series connection
The two ends of circuit.
First by-pass switch, can also be using the structure as shown in Fig. 3 (b), by S5And S6Each differential concatenation one two
Pole pipe, then compose in parallel；S5Source electrode connection diode D5Positive pole, S6Source electrode connection diode D6Positive pole, S5Drain electrode
Connection diode D6Negative pole, S6Drain electrode connection diode D5Negative pole；By S5Drain electrode and S6Drain electrode be coupled with first
L in resonance circuitres1、Cres1The two ends of series circuit.
First by-pass switch, can also be using the structure as shown in Fig. 3 (c), by S5Source electrode simultaneously connect two poles
Pipe D6Positive pole and diode D10Positive pole, S5Drain electrode connect diode D simultaneously5Negative pole and diode D9Negative pole；D5's
Positive pole and D6Negative pole be connected, and draw a terminal, D9Positive pole and D10Negative pole be connected, and draw a terminal, by two
The terminal of individual extraction is coupled with L in the first resonance circuitres1、Cres1The two ends of series circuit.
First by-pass switch, can also be combined using relay switch.
In the present embodiment, second by-pass switch, it is also possible to as first by-pass switch, using Fig. 3 (a)~
Structure shown in Fig. 3 (c), can also be that relay switch is combined.
In the present embodiment, first rectification/inverter circuit is full-bridge or half bridge switching circuit.
In the present embodiment, second rectification/inverter circuit is full-bridge or half bridge switching circuit.
In the present embodiment, constitute the switching tube of first by-pass switch and second by-pass switch, be MOSFET,
Any one in IGBT, SIC or GAN switching tube.
Those skilled in the art should be able to recognize that, the side of each example described with reference to the embodiments described herein
Method step, can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate electronic hardware and
The interchangeability of software, generally describes the composition and step of each example according to function in the above description.These
Function is performed with electronic hardware or software mode actually, depending on the application-specific and design constraint of technical scheme.
Those skilled in the art can realize described function to each specific application using distinct methods, but this reality
Now it is not considered that beyond the scope of this invention.
So far, combined preferred embodiment shown in the drawings describes technical scheme, but, this area
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
On the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to correlation technique feature, these
Technical scheme after changing or replacing it is fallen within protection scope of the present invention.
Claims (10)
1. a kind of two-way DC/DC power inverters, including the first rectification/inverter circuit, the first resonance circuit, transformer, second
Rectification/inverter circuit, first resonance circuit is arranged at the AC of the first rectification/inverter circuit；Characterized in that, also wrapping
Include the second resonance circuit, and by-pass switch group；
The DC side of first rectification/inverter circuit is the power input/output end of the power inverter, corresponding second
The DC side of rectification/inverter circuit is the power supply input/output end of the power inverter；
Second resonance circuit is arranged at the AC of the second rectification/inverter circuit；
The by-pass switch group, is configured in forward direction conveying power, by the bypass of the second resonance circuit；In reversely conveying power
When, by the bypass of the first resonance circuit.
2. converter according to claim 1, it is characterised in that the by-pass switch group includes：First by-pass switch and
Second by-pass switch；
First by-pass switch is in parallel with first resonance circuit；
Second by-pass switch is in parallel with second resonance circuit.
3. converter according to claim 2, it is characterised in that during forward direction conveying power, first rectification/inversion electricity
Road works in high-frequency inversion pattern, and second rectification/inverter circuit works in high-frequency rectification pattern；First by-pass switch
It is cut-off state, second by-pass switch is conducting state.
4. converter according to claim 3, it is characterised in that reversely during conveying power, second rectification/inversion electricity
Road works in high-frequency inversion pattern, and first rectification/inverter circuit works in high-frequency rectification pattern；First by-pass switch
It is conducting state, second by-pass switch is cut-off state.
5. converter according to claim 4, it is characterised in that during forward direction conveying power, the first rectification/inverter circuit
Switching frequency is selected near circuit resonance point.
6. converter according to claim 5, it is characterised in that reversely during conveying power, the second rectification/inverter circuit
Switching frequency is selected near circuit resonance point.
7. converter according to claim 6, it is characterised in that：
First resonance circuit, including resonant inductance Lres1With resonant capacitance Cres1, Lres1And Cres1Series connection；
Second resonance circuit, including resonant inductance Lres2With resonant capacitance Cres2, Lres2And Cres2Series connection；
One end of first rectification/inverter circuit AC is being sequentially connected in series Lres1、Cres1Afterwards with one end phase of transformer primary side
Even；First rectification/other end of inverter circuit AC is connected with the other end of transformer primary side；
One end of second rectification/inverter circuit AC and Cres2、Lres2One end phase after being sequentially connected in series with transformer secondary
Even；Second rectification/other end of inverter circuit AC is connected with the other end of transformer secondary；
First by-pass switch, with Lres1、Cres1The series circuit of composition is in parallel；
Second by-pass switch, with Lres2、Cres2The series circuit of composition is in parallel.
8. converter according to claim 7, it is characterised in that during forward direction conveying power, the first rectification/inverter circuit
Switching frequency selects the lower resonance range in the first resonance circuit, less than resonance point 1/sqrt (Lres1*Cres1), but higher than resonance
Point 1/sqrt ((Lres1+Lm)*Cres1)), wherein LmIt is the magnetizing inductance of transformer.
9. converter according to claim 8, it is characterised in that reversely during conveying power, the second rectification/inverter circuit
Switching frequency selects the lower resonance range in the second resonance circuit, less than resonance point 1/sqrt (Lres2*Cres2), but higher than resonance
Point 1/sqrt ((Lres2+Lm)*Cres2)), wherein LmIt is the magnetizing inductance of transformer.
10. the converter according to any one of claim 2~9, it is characterised in that also controlled including by-pass switch group single
Unit, the unit is configured to the power transmission direction according to the converter, control by-pass switch group bypass the first resonance circuit or
Second resonance circuit.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710079584.XA CN106685235A (en) | 2017-02-14 | 2017-02-14 | Bidirectional DC/DC power converter |
| PCT/CN2018/074800 WO2018149295A1 (en) | 2017-02-14 | 2018-01-31 | Bidirectional dc/dc power converter |
| TW107105569A TW201841460A (en) | 2017-02-14 | 2018-02-14 | Bi-directional DC/DC Power Converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710079584.XA CN106685235A (en) | 2017-02-14 | 2017-02-14 | Bidirectional DC/DC power converter |
Publications (1)
| Publication Number | Publication Date |
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| CN106685235A true CN106685235A (en) | 2017-05-17 |
Family
ID=58862136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710079584.XA Pending CN106685235A (en) | 2017-02-14 | 2017-02-14 | Bidirectional DC/DC power converter |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN106685235A (en) |
| TW (1) | TW201841460A (en) |
| WO (1) | WO2018149295A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018149295A1 (en) * | 2017-02-14 | 2018-08-23 | 上海蔚来汽车有限公司 | Bidirectional dc/dc power converter |
| CN111355381A (en) * | 2020-03-31 | 2020-06-30 | 惠州拓邦电气技术有限公司 | Bidirectional bridge type resonant converter |
| CN111404379A (en) * | 2019-01-02 | 2020-07-10 | 卡任特照明解决方案有限公司 | Resonant converter and DC/DC power converter |
| CN112865544A (en) * | 2021-02-20 | 2021-05-28 | 阳光电源股份有限公司 | Bidirectional DCDC power supply and charging pile |
| CN113271018A (en) * | 2021-06-28 | 2021-08-17 | 上海电气集团股份有限公司 | Bidirectional isolation type three-phase direct current converter with bypass circuit |
| CN113489334A (en) * | 2021-07-09 | 2021-10-08 | 北方工业大学 | High-voltage direct-current converter based on secondary side active loop and control method thereof |
| WO2022088256A1 (en) * | 2020-10-30 | 2022-05-05 | 深圳市思倍生电子科技有限公司 | Bidirectional inverter circuit and bidirectional inverter charging apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112398346B (en) * | 2019-08-16 | 2022-10-04 | 联合汽车电子有限公司 | Bidirectional converter topology |
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| KR101314903B1 (en) * | 2012-04-25 | 2013-10-04 | 카코뉴에너지 주식회사 | Bidirectional dc/dc converter |
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| CN112865544A (en) * | 2021-02-20 | 2021-05-28 | 阳光电源股份有限公司 | Bidirectional DCDC power supply and charging pile |
| CN113271018A (en) * | 2021-06-28 | 2021-08-17 | 上海电气集团股份有限公司 | Bidirectional isolation type three-phase direct current converter with bypass circuit |
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Also Published As
| Publication number | Publication date |
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| TW201841460A (en) | 2018-11-16 |
| WO2018149295A1 (en) | 2018-08-23 |
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