CN106877671A - A kind of inductance capacitance connection in series-parallel combinational circuit and Switching Power Supply - Google Patents
A kind of inductance capacitance connection in series-parallel combinational circuit and Switching Power Supply Download PDFInfo
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- CN106877671A CN106877671A CN201710129221.2A CN201710129221A CN106877671A CN 106877671 A CN106877671 A CN 106877671A CN 201710129221 A CN201710129221 A CN 201710129221A CN 106877671 A CN106877671 A CN 106877671A
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Classifications
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- 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
- H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/4815—Resonant converters
-
- 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 kind of inductance capacitance connection in series-parallel combinational circuit and Switching Power Supply.Including：Second inductance is connected in series with primary coil, constitutes LT circuits, and LT circuits are connected in parallel with the second electric capacity, constitutes LC parallel circuits；LC parallel circuits are connected with the first inductance and the first capacitances in series, constitute LCLC series-parallel circuits；The two ends of LCLC series-parallel circuits connect signal input part respectively, the voltage excitation signals or current excitation signal of signal input part input predeterminated frequency, LCLC series-parallel circuits produce vibration, secondary coil output predeterminated voltage under voltage excitation signals or current excitation signal function.By implementing the present invention, the output voltage of exportable wide scope while exportable high current, also meets ZVT, and with electromagnetic interference it is small the characteristics of.
Description
Technical field
The present invention relates to field of switch power, more specifically to a kind of inductance capacitance connection in series-parallel combinational circuit and open
Powered-down source.
Background technology
In the application circuit of field of switch power：
As shown in figure 3, be a kind of traditional circuit of reversed excitation, exist efficiency it is low-transformer leakage inductance energy leans on RCD circuits completely
Absorb, i.e. the heating loss of resistance R falls；Volume is big-and transformer needs energy storage, radiates；The reverse high pressure of secondary commutation pipe-when low
When pressure output needs high current, the application conditions of wide scope input and output voltage are not suitable for ,-as in Switching Power Supply application,
Meet the requirement of USB-PD output voltage ranges (3V-21V), when meeting low-voltage, high-current again and filling technology (more than 3A) soon, together
When meet the application conditions of field of switch power newest efficiency requirement；
As shown in figure 4, being a kind of follow-on circuit of reversed excitation：Active clamp flyback.Although transformer leakage inductance energy is electric
Road effectively utilizes, but can't be completely secured it is various under the conditions of can also meet ZVT (Sofe Switch)；Same volume is big-
Transformer needs energy storage, radiating；The reverse high pressure of secondary commutation pipe-and when low pressure output needs high current, it is not suitable for model wide
The application conditions of input and output voltage are enclosed ,-as in Switching Power Supply application, met USB-PD output voltage ranges (3V-21V)
It is required that, when meeting low-voltage, high-current again and filling technology (more than 3A) soon, while meeting the newest efficiency requirement of field of switch power
Application conditions；
As shown in figure 5, being a kind of LLC half-bridge circuits, circuit efficiency is high, and secondary commutation pipe is reversely resistance to force down-only have output
The twice of voltage.When the input and output voltage of wide scope is needed, due to the voltage gain that LLC half-bridge circuits are limited, this electricity
Road cannot be applicable ,-as in Switching Power Supply application, met the requirement of USB-PD output voltage ranges (3V-21V).
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, there is provided a kind of inductance capacitance string
Parallel combination circuit, including：Signal input part, the first inductance, the second inductance, the first electric capacity, the second electric capacity, transformer, it is described
Transformer includes primary coil and secondary coil, wherein,
Second inductance is connected in series with the primary coil, constitutes LT circuits, the LT circuits and the described second electricity
Appearance is connected in parallel, and constitutes LC parallel circuits；
The LC parallel circuits are connected with first inductance and the first capacitances in series, constitute LCLC series-parallel circuits；
The two ends of the LCLC series-parallel circuits connect the signal input part respectively, and the signal input part input is default
The voltage excitation signals or current excitation signal of frequency, the LCLC series-parallel circuits swash in the voltage excitation signals or electric current
Generation vibration under signal function is encouraged, the secondary coil exports predeterminated voltage.
Preferably, inductance capacitance connection in series-parallel combinational circuit of the present invention, the signal input part includes：Control source
End, ON-OFF control circuit, half-bridge circuit, wherein,
The ON-OFF control circuit is connected and controls the half-bridge circuit；The half-bridge circuit connects the control source
End, obtains input voltage；The two ends of the LCLC series-parallel circuits connect the half-bridge circuit respectively.
Preferably, inductance capacitance connection in series-parallel combinational circuit of the present invention, the half-bridge circuit includes：First switch,
Second switch,
The ON-OFF control circuit connects the first switch and second switch respectively, and the ON-OFF control circuit controls institute
State the ON/OFF of first switch and second switch；
One end of the first switch connects the voltage input end, the other end connection described second of the first switch
One end of switch, the other end of the second switch connects one end of the LCLC series-parallel circuits, the LCLC connection in series-parallel electricity
The other end on road connects the tie point of the first switch and second switch.
Preferably, inductance capacitance connection in series-parallel combinational circuit of the present invention, first electric capacity include the 3rd electric capacity and
4th electric capacity, the half-bridge circuit includes：First switch, second switch, wherein,
One end of the LC parallel circuits connects the tie point of the first switch and second switch by the inductance L1,
The other end of the LC parallel circuits connects one end of the 3rd electric capacity and the 4th electric capacity respectively, the 3rd electric capacity
The other end connects the second switch, and the other end of the 4th electric capacity connects the voltage input end；
The ON-OFF control circuit connects the first switch and second switch respectively, and the ON-OFF control circuit controls institute
State the ON/OFF of first switch and second switch；
One end of the first switch connects the voltage input end, the other end connection described second of the first switch
One end of switch, the other end of the second switch connects the 3rd electric capacity.
Preferably, inductance capacitance connection in series-parallel combinational circuit of the present invention, one end connection of the first switch is described
The positive pole of voltage input end, the other end of the first switch connects one end of the second switch, the second switch it is another
One end connects the negative pole of the voltage input end.
Preferably, inductance capacitance connection in series-parallel combinational circuit of the present invention, the signal input part includes：Control source
End, ON-OFF control circuit, full-bridge circuit, wherein,
The ON-OFF control circuit is connected and controls the full-bridge circuit；The full-bridge circuit connects the control source
End, obtains input voltage；The two ends of the LCLC series-parallel circuits connect the full-bridge circuit respectively.
Preferably, inductance capacitance connection in series-parallel combinational circuit of the present invention, the full-bridge circuit includes：First switch,
Second switch, the 3rd switch, the 4th switch, wherein,
The ON-OFF control circuit connects the first switch, second switch, third switch, the 4th switch respectively, described
ON-OFF control circuit controls the first switch, second switch, third switch, the ON/OFF of the 4th switch；
One end of the LCLC series-parallel circuits connects the tie point of the first switch and second switch, the LCLC strings
Other end connection the 3rd switch and the tie point of the 4th switch of parallel circuit；
The voltage input end connects one end of the first switch and the 3rd switch respectively；
The other end of the first switch connects one end of the second switch, the other end ground connection of the second switch；
Other end connection the 4th switch of the 3rd switch, the other end ground connection of the 4th switch.
Preferably, inductance capacitance connection in series-parallel combinational circuit of the present invention, one end connection of the first switch is described
The positive pole of voltage input end, the other end of the first switch connects one end of the second switch, the second switch it is another
One end connects the negative pole of the voltage input end；
One end of 3rd switch connects the positive pole of the voltage input end, the other end connection institute of the 3rd switch
One end of the 4th switch is stated, the other end of the 4th switch connects the negative pole of the voltage input end.
Preferably, inductance capacitance connection in series-parallel combinational circuit of the present invention, the first switch, second switch, the 3rd
Switch and the 4th switch are switching tube or metal oxide semiconductor field effect tube.
The another present invention also constructs a kind of Switching Power Supply, and the Switching Power Supply includes above-mentioned inductance capacitance connection in series-parallel combination electricity
Road.
Implement a kind of inductance capacitance connection in series-parallel combinational circuit of the invention and Switching Power Supply, have the advantages that：Should
Inductance capacitance connection in series-parallel combinational circuit includes：Second inductance is connected in series with primary coil, constitutes LT circuits, LT circuits and second
Electric capacity is connected in parallel, and constitutes LC parallel circuits；LC parallel circuits are connected with the first inductance and the first capacitances in series, composition
LCLC series-parallel circuits；The two ends of LCLC series-parallel circuits connect signal input part, signal input part input predeterminated frequency respectively
Voltage excitation signals or current excitation signal, LCLC series-parallel circuits are under voltage excitation signals or current excitation signal function
Produce vibration, secondary coil output predeterminated voltage.By implementing the present invention, the output voltage of exportable wide scope, while can be defeated
Go out high current, also meet ZVT, and with electromagnetic interference it is small the characteristics of.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 a- Fig. 1 g are the circuit diagrams of inductance capacitance connection in series-parallel combinational circuit of the present invention；
Fig. 2 a are the circuit diagrams that inductance capacitance connection in series-parallel combinational circuit output end of the present invention is bridge rectifier；
Fig. 2 b are the circuit diagrams that inductance capacitance connection in series-parallel combinational circuit output end of the present invention is full-wave rectification；
Fig. 3 is a kind of traditional circuit of reversed excitation；
Fig. 4 is a kind of follow-on circuit of reversed excitation；
Fig. 5 is a kind of LLC half-bridge circuits；
Fig. 6 is the voltage x current figure of an embodiment of inductance capacitance connection in series-parallel combinational circuit of the present invention；
Fig. 7 to Figure 16 is a complete working period T0-T3 time period voltage and current waveform of the invention；
Figure 17 to Figure 19 is the circuit diagram of the embodiment of some deformation circuits of equal value of the invention.
Specific embodiment
In order to be more clearly understood to technical characteristic of the invention, purpose and effect, now compare accompanying drawing and describe in detail
Specific embodiment of the invention.
The present invention provides a kind of inductance capacitance connection in series-parallel combinational circuit, including：Signal input part, the first inductance L1, second
Inductance L2, the first electric capacity C1, the second electric capacity C2, transformer T1, transformer T1 include primary coil T11 and secondary coil T21, its
In,
Second inductance L2 and primary coil T11 is connected in series, and constitutes LT circuits, and LT circuits are in parallel with the second electric capacity C2 even
Connect, constitute LC parallel circuits；It will be understood by those skilled in the art that the second inductance L2 is presented induction reactance characteristic herein, can be by it
He has the electronic original part or circuit realiration of induction reactance characteristic, as its effect, belong to protection scope of the present invention.Similarly,
Second electric capacity C2 is presented capacitive reactance characteristic herein, the electronic original part or circuit realiration can by other with capacitive reactance characteristic, its effect
The same, belong to protection scope of the present invention.
LC parallel circuits are connected in series with the first inductance L1 and the first electric capacity C1, constitute LCLC series-parallel circuits, this Shen
Please the series sequence not to LC parallel circuits, the first inductance L1, the first electric capacity C1 is defined, as long as it is series connection to meet three
Annexation.It will be understood by those skilled in the art that the first inductance L1 is presented induction reactance characteristic herein, can have by other
The electronic original part or circuit realiration of induction reactance characteristic, as its effect, belong to protection scope of the present invention.Similarly, the first electricity
Hold C1 and capacitive reactance characteristic is presented herein, can have the electronic original part or circuit realiration of capacitive reactance characteristic by other, as its effect,
Belong to protection scope of the present invention.
It will be understood by those skilled in the art that on the basis of the technical program, other peripheries such as addition series resistance are electric
Road, belongs to the circuit modifications for not influenceing the technical program essence, belongs to protection scope of the present invention.
It should be noted that the present invention is not to the first inductance L1, the second inductance L2, the first electric capacity C1, the second electric capacity C2
Occurrence is defined, and can carry out adaptation Sexual behavior mode according to specific embodiment.
The two ends of LCLC series-parallel circuits connect signal input part respectively, and the voltage of signal input part input predeterminated frequency swashs
Signal or current excitation signal are encouraged, LCLC series-parallel circuits are produced under voltage excitation signals or current excitation signal function and shaken
Swing, secondary coil T21 output predeterminated voltages.
Specifically, being based on above-mentioned principle, circuit of the invention has various structures, is the present invention as shown in Fig. 1 a- Fig. 1 g
The circuit diagram of inductance capacitance connection in series-parallel combinational circuit some embodiments.
Now illustrated by taking Fig. 1 a as an example, in fig 1 a, the second inductance L2 and primary coil T11 is connected in series, constitute LT
Circuit；The LT circuits are connected in parallel with the second electric capacity C2, constitute LC parallel circuits；One end of the LC parallel circuits is connected in series
One electric capacity C1 and the first inductance L1, constitutes LCLC series-parallel circuits；The two ends of the LCLC series-parallel circuits connect with signal input part
Connect.
Fig. 1 b- Fig. 1 g can similarly be obtained, and with specific reference to accompanying drawing, be repeated no more here.
The technical scheme that can be seen that the application from Fig. 1 a- Fig. 1 g is flexible and changeable, but its general principle is with essential function
The same.Those skilled in the art according to above-mentioned principle, in circuit is embodied, can be former by the electronics with induction reactance characteristic
Part or circuit substitute the inductance original paper in the application, such as inductance L1 and inductance L2；Can be by the electronic original part with capacitive reactance characteristic
Or circuit substitutes the capacitive reactance original paper in the application, such as electric capacity C1 and electric capacity C2；But the technical side of the circuit and the application after substituting
Case is of equal value, and essence is identical.So, Fig. 1 a- Fig. 1 g enumerated in the application only to the inductance capacitance string of the application simultaneously
Joint group closes circuit theory and illustrates, and is not used to limit the specific constructive form of circuit, and circuit is entered based on the application principle
Capable equivalence transformation, belongs to protection scope of the present invention.
Preferably, the signal input part of the application includes but is not limited to half-bridge circuit and full-bridge circuit etc., can produce default
Signal.Half-bridge circuit and full-bridge circuit are illustrated individually below.
A, for half-bridge circuit：
Signal input part includes：Voltage input end, ON-OFF control circuit, half-bridge circuit, wherein, ON-OFF control circuit connection
And control half-bridge circuit；Half-bridge circuit connects voltage input end, obtains input voltage；The two ends of LCLC series-parallel circuits connect respectively
Connect half-bridge circuit.
Half-bridge circuit includes：First switch K1, second switch K2, ON-OFF control circuit connect first switch K1 and respectively
Two switch K2, ON-OFF control circuit controls the ON/OFF of first switch K1 and second switch K2；
One end connection voltage input end of first switch K1, the one of the other end connection second switch K2 of first switch K1
End, the other end of second switch K2 connects one end of LCLC series-parallel circuits, the other end connection first of LCLC series-parallel circuits
Switch the tie point of K1 and second switch K2.
Preferably, according to the application general principle, the can be substituted using electronic original part or circuit with capacitive reactance characteristic
One electric capacity C1, those skilled in the art carry out accommodation.For example, the first electric capacity C1 includes the 3rd electric capacity C3 and the 4th
One end of electric capacity C4, LC parallel circuit connects the tie point of first switch K1 and second switch K2, LC electricity in parallel by inductance L1
The other end on road connects one end of the 3rd electric capacity C3 and the 4th electric capacity C4, the other end connection second switch of the 3rd electric capacity C3 respectively
The other end connection voltage input end of K2, the 4th electric capacity C4；ON-OFF control circuit connects first switch K1 and second switch respectively
K2, ON-OFF control circuit controls the ON/OFF of first switch K1 and second switch K2；One end connection control source of first switch K1
End, one end of the other end connection second switch K2 of first switch K1, the other end of second switch K2 connects the 3rd electric capacity C3.
Preferably, one end of first switch K1 connects the positive pole of voltage input end, the other end connection the of first switch K1
One end of two switch K2, the other end of second switch K2 connects the negative pole of voltage input end.
B, for full-bridge circuit：
Signal input part includes：Voltage input end, ON-OFF control circuit, full-bridge circuit, wherein, ON-OFF control circuit connection
And control full-bridge circuit；Full-bridge circuit connects voltage input end, obtains input voltage；The two ends of LCLC series-parallel circuits connect respectively
Connect full-bridge circuit.
Full-bridge circuit includes：First switch K1, second switch K2, the 3rd switch K3, the 4th switch K4, wherein, switch control
Circuit processed connects first switch K1, second switch K2, the 3rd switch K3, the 4th switch K4, ON-OFF control circuit control the respectively
One switch K1, second switch K2, the 3rd switch K3, the ON/OFF of the 4th switch K4；One end connection first of LCLC series-parallel circuits
The tie point of K1 and second switch K2 is switched, the other end connection the 3rd of LCLC series-parallel circuits switchs the switches of K3 and the 4th K4's
Tie point；Voltage input end connects one end of the switches of first switch K1 and the 3rd K3 respectively；The other end connection of first switch K1
One end of second switch K2, the other end ground connection of second switch K2；The other end connection the 4th of the 3rd switch K3 switchs K4, the 4th
Switch the other end ground connection of K4.
Preferably, one end of first switch K1 connects the positive pole of voltage input end, the other end connection the of first switch K1
One end of two switch K2, the other end of second switch K2 connects the negative pole of voltage input end；One end connection electricity of the 3rd switch K3
The other end connection the 4th of the positive pole of input, the 3rd switch K3 is pressed to switch one end of K4, the other end connection of the 4th switch K4
The negative pole of voltage input end.
Preferably, first switch K1, second switch K2, the 3rd switch K3 and the 4th switch K4 are switching tube or metal
Oxide semiconductor field effect pipe.It is appreciated that first switch K1, second switch K2, the 3rd switch K3 and the 4th switch K4
ON/OFF effect is played, therefore, first switch K1, second switch K2, the 3rd switch K3 and the 4th switch K4 also may be selected it
He has the electronic original part or on-off circuit of switching function, can realize switch.
With reference to Fig. 2 a, Fig. 2 b and Fig. 6 to Figure 19, principle of the invention and the present invention are illustrated by specific embodiment
The technique effect that can be reached.
It is that inductance capacitance connection in series-parallel combinational circuit output end of the present invention is the circuit diagram of bridge rectifier such as Fig. 2 a；Such as Fig. 2 b,
Originally it is that inductance capacitance connection in series-parallel combinational circuit output end of the present invention is the circuit diagram of full-wave rectification.
In Fig. 2 a and Fig. 2 b, the secondary coil T21 of transformer T1 connects the load circuit of output end, is used only to explanation
Integrality of the invention and the course of work, not the connection load to output end are limited, and those skilled in the art can be according to tool
Body needs to set the connection of output end.
Such as Fig. 2 b, circuit includes：Voltage input end, first switch pipe K1, second switch pipe K2 for input voltage, open
Close control circuit, the first inductance L1, the first electric capacity C1, the second electric capacity C2, the second inductance L2, transformer T1, transformer T1 just
Level coil T11, the secondary coil T21 and T22 of transformer T1, output commutation diode D1 and D2, output capacitance C5 and load
Resistance R1, wherein,
ON-OFF control circuit is connected and controls first switch K1 and second switch K2；One end connection voltage of first switch K1
The positive pole of input, obtains input voltage；The other end of first switch connects one end of second switch, the other end of second switch
The negative pole of voltage input end is connected, half-bridge circuit is constituted.
One end of Same Name of Ends (having sign round dot) the connection inductance L2 of primary coil T11, constitutes LT circuits；Primary coil
The other end of T11 connects the negative pole of voltage input end.One end of the other end connection electric capacity C2 of inductance L2, the other end of electric capacity C2
The other end of connection primary coil T11, constitutes lc circuit；One end of the other end connection electric capacity C1 of inductance L2, electric capacity C1's is another
One end connects one end of inductance L1, constitutes LCLC series-parallel circuits；The other end connection first switch K1 and second of inductance L1 is opened
Close the tie point of K2.
The positive pole of Same Name of Ends (having sign round dot) the connection diode D1 of secondary coil T21, the other end of secondary coil T21
The Same Name of Ends (having sign round dot) of connection secondary coil T22, the positive pole of the other end connection diode D2 of secondary coil T22；Two
The negative pole of the negative pole connection diode D2 of pole pipe D1；The negative pole of diode D1 is by the 5th electric capacity C5 of parallel connection and resistance R1 (outputs
Load resistance) connection secondary coil T22 Same Name of Ends.
It is appreciated that ON-OFF control circuit is used to control the turn-on and turn-off of first switch pipe K1 and second switch pipe K2,
So as to form pumping signal in LCLC series-parallel circuits.Specific implementation of the present invention not to controlling circuit is limited,
As long as can control the circuit or controller and its circuit of first switch pipe K1 and second switch pipe K2 break-makes can.
Preferably, first switch pipe K1 and second switch pipe K2 are substituted using metal oxide semiconductor field effect tube, gold
The parasitic body diode for belonging to oxide semiconductor field effect pipe also shows in circuit.
Preferably, the rectifying tube for full-wave rectification can be substituted with diode.
For Fig. 2 b, to further illustrate operation principle of the invention, now enumerate concrete numerical value and illustrate.
Input voltage uses 80VDC DC voltages, and ON-OFF control circuit control frequency is reached when the resistance of first resistor R1
It is 3 Ω to be worth, while when the magnitude of voltage at first resistor R1 two ends is 16.8V, obtaining the electricity of each main node or device in circuit
Current voltage waveform, with reference to Fig. 6, Fig. 6 is the voltage x current figure of inductance capacitance connection in series-parallel combinational circuit of the present invention, wherein：
Vhb shows the voltage waveform at first switch pipe K1 and second switch pipe K2 half-bridge circuits midpoint, and its maximum is
The magnitude of voltage 80V of input voltage；
Vc2 shows the voltage waveform at the second electric capacity C2 two ends, while that is to say the second inductance L2 and transformer
After series connection, the voltage waveform at its two ends；
IC2 shows the current waveform flowed through in the second electric capacity C2 devices；
Iin shows the first inductance L1, the current waveform flowed through in the first electric capacity C1；
IL2 shows the electric current flowed through in the second inductance L2, the current wave for also as being flowed through in transformer T1 primary coils T11
Shape；Wherein, IC2, Iin, meet between IL2 three：Iin=IC2+IL2.
ID1 shows the current waveform flowed through in the first diode D1；ID2 shows the current wave flowed through in the second diode D2
Shape；
Vgh shows the control waveform of first switch pipe K1 control ends；When its magnitude of voltage is 1, first switch pipe is represented
K1 is required conducting, and in low-impedance conducting state；When its magnitude of voltage is 0, represents first switch pipe K1 and be required shut-off,
And it is off state；
Vgl shows the control waveform of second switch pipe K2 control ends；When its magnitude of voltage is 1, second switch pipe is represented
K2 is required conducting, and in low-impedance conducting state；When its magnitude of voltage is 0, represents second switch pipe K2 and be required shut-off,
And it is off state；
VD1 shows the voltage waveform at the first commutation diode D1 two ends；VD2 shows the electricity at the second commutation diode D2 two ends
Corrugating；
Vout shows the voltage waveform at the 5th electric capacity C5 (output capacitance) and first resistor R1 (output load resistance) two ends,
Output voltage waveforms i.e. described under ordinary meaning.
Further, for the operation principle of circuit described in the invention is more clearly understood, at this to a complete job
The voltage current waveform of the different time sections in cycle, carries out labor；It is a complete work of the invention with reference to Fig. 7 to Figure 16
Make cycle T 0-T3 time period voltage and current waveforms.
Specifically, such as Fig. 7 and Fig. 8, in the T0 time periods：
Time period shown by dash area：That is the control end input voltage of first switch pipe K1 and second switch pipe K2 is all
It is low potential, i.e., magnitude of voltage is 0, first switch pipe K1 and second switch pipe K2 is off state；
In the T0 time periods, the Iin senses of current are the side that electric current in half-bridge mid point-continuity circuit is flowed to from LCLC combinational circuits
To, formed electric discharge to first switch pipe K1 junction capacity and second switch pipe K2 junction capacity charge function；Complete to be opened to first
Pipe K1 and second switch pipe K2 junction capacity discharge and recharges are closed, after completing the conversion from low to high of half-bridge mid point (tie point) point position,
Vhb- is that the midpoint of the half-bridge circuit of first switch pipe K1 and second switch pipe K2 compositions is presented high potential-add equal to input voltage
The forward conduction voltage drop of upper first switch pipe K1 body diodes, i.e. Iin electric currents continue circuit state, by first switch pipe K1
Body diode flow through electric current；
In the T0 time periods, the IL2 senses of current are from the connection end flow direction and transformer with the second electric capacity C2
Connection end, current absolute value is presented the trend for reducing.
In the T0 time periods, in the secondary end of transformer, i.e. secondary coil T21, the Same Name of Ends of T22 forms low potential；Exist
It is 2 times of output voltage values that first diode D1 two ends form reverse bias voltage-its magnitude of voltage, without electric current, is presented
Open-circuit condition；Forward bias voltage is formed at the second diode D2 two ends, forward conduction state is presented, wherein there is electric current ID2 to flow
Cross, and the trend of absolute value increase is presented.
In the T0 time periods, LCLC series-parallel circuits are the stage for releasing energy.The energy stored in LCLC series-parallel circuits
Charged to the electric discharge of first switch pipe K1 junction capacity and second switch pipe K2 junction capacity, and there is portion of energy to flow back to input voltage source,
Energy is maintained simultaneously to the supply of output end.
Such as in Fig. 9 and Figure 10, in the T1 time periods：
Time period shown by dash area：I.e. the control end input voltage of first switch pipe K1 is high potential, i.e. voltage
It is 1 to be worth, and first switch pipe K1 is conducting state；The control end input voltage of second switch pipe K2 is for low potential, i.e. magnitude of voltage
0, second switch pipe K2 are off state；Vhb- is the midpoint of the half-bridge circuit of first switch pipe K1 and second switch pipe K2 compositions
For high potential-be equal to input voltage.
In the T1 time periods, the Iin senses of current are to flow to LCLC combinational circuits from half-bridge mid point, are formed and give LCLC combinational circuits
The process charged with transformer, input fills energy to whole circuit；
In the T1 time periods, the IL2 senses of current are from the connection end flow direction and the second electric capacity C2 with transformer
Connection end, electric current is presented by just profound ripple trend-from less than zero, to zero passage, to maximum, to progressively reducing but still more than zero
Process.
It is interval in the leading portion of T1 time periods, in the electric current IL2 in the second inductance L2 is not equal to transformer
During exciting current, in transformer secondary coil T21, the Same Name of Ends of T22 forms low potential；That is the first diode D1 is formed reversely partially
It is 2 times of output voltage values to put voltage-its magnitude of voltage, without electric current, open-circuit condition is presented；Second diode D2 is formed just
To bias voltage, forward conduction state is presented, wherein there is electric current ID2 to flow through；
In the T1 time periods close to the interval terminated, in the primary side of transformer, when the electric current IL2 in the second inductance L2 and change
After the equal intersection of exciting current in depressor primary coil, the induced electromotive force phase in transformer coil is inverted, secondary
The Same Name of Ends of level coil T21, T22 forms high potential；Forward bias voltage is formed at the first diode D1 two ends, is presented positive
Conducting state, wherein there is electric current ID1 to flow through, and is presented the trend of increase；Second diode D2 forms reverse bias voltage-its electricity
Pressure value is 2 times of output voltage values, without electric current, open-circuit condition is presented；
The T1 time periods, the stage of storage energy is provided to LCLC series-parallel circuits for input voltage source.Energy is maintained simultaneously
To the supply of output end, to provide the main interval of energy to output end.
Such as Figure 11 and Figure 12, in the T2 time periods：
Time period shown by dash area：That is the control end input voltage of first switch pipe K1 and second switch pipe K2 is all
It is low potential, i.e., magnitude of voltage is 0, first switch pipe K1 and second switch pipe K2 is off state；
In the T2 time periods, the Iin senses of current are to flow to LCLC combinational circuits from half-bridge mid point, are formed and give first switch pipe K1
The function that junction capacity is charged and second switch pipe K2 junction capacity is discharged；Complete to be tied to first switch pipe K1 and second switch pipe K2
Capacitor charge and discharge, after completing the conversion from high to low of half-bridge mid point current potential, Vhb- is first switch pipe K1 and second switch pipe K2
The midpoint of the half-bridge circuit of composition is presented low potential-upper second switch pipe K2 bodies two also lower than input voltage negative reference point
The forward conduction voltage drop of pole pipe.I.e. Iin electric currents continue circuit state, and electricity is flowed through by the body diode of second switch pipe K2
Stream；
In the T2 time periods, the IL2 senses of current are from the connection end flow direction and the second electric capacity C2 with transformer
Connection end, current absolute value is presented the trend for reducing.
In the T2 time periods, in the secondary end of transformer, i.e. secondary coil T21, the Same Name of Ends of T22 forms high potential；Exist
First diode D1 two ends form forward bias voltage, and forward conduction state is presented, wherein there is electric current ID1 to flow through, and increasing are presented
Big trend；Reverse bias voltage is formed at the second diode D2 two ends, its magnitude of voltage is 2 times of output voltage values, wherein not having
There is electric current, open-circuit condition is presented.
In the T2 time periods, LCLC series-parallel circuits are the stage for releasing energy.The energy stored in LCLC series-parallel circuits
Charged to first switch pipe K1 junction capacity and the electric discharge of second switch pipe K2 junction capacity, while maintaining energy to the supply of output end.
Such as Figure 13 and Figure 14, in the T3 time periods：
Time period shown by dash area：I.e. the control end input voltage of first switch pipe K1 is all low potential, i.e. electricity
Pressure value is 0, and first switch pipe K1 is off state；The control end input voltage of second switch pipe K2 is high potential, i.e. magnitude of voltage
It is 1, second switch pipe K2 is conducting state；Vhb- be first switch pipe K1 and second switch pipe K2 composition half-bridge circuit in
Point for low potential-be equal to input voltage negative reference current potential.
In the T3 time periods, the Iin senses of current are to flow to half-bridge mid point from LCLC combinational circuits, and LCLC combinational circuits are by becoming
Depressor releases energy to output end；
In the T3 time periods, the IL2 senses of current are from the connection end flow direction and transformer with the second electric capacity C2
Connection end, electric current is presented by just profound ripple trend-from less than zero, to zero passage, to maximum, to progressively reducing but still more than zero
Process.
It is interval in the leading portion of T3 time periods, in the electric current IL2 in the second inductance L2 is not equal to transformer
During exciting current, in transformer secondary coil T21, the Same Name of Ends of T22 forms high potential；That is the first diode D1 forms forward bias
Voltage is put, forward conduction state is presented, wherein there is electric current ID1 to flow through；Second diode D2 forms reverse bias voltage, its voltage
It is 2 times of output voltage values to be worth, and without electric current, open-circuit condition is presented；
In the T3 time periods close to the interval terminated, in the primary side of transformer, when the electric current IL2 in the second inductance L2 and change
After the equal intersection of exciting current in depressor primary coil, the induced electromotive force phase in transformer coil is inverted, secondary
The Same Name of Ends of level coil T21, T22 forms low potential；Reverse bias voltage, its magnitude of voltage are formed at the first diode D1 two ends
It is 2 times of output voltage values, without electric current, open-circuit condition is presented；Second diode D2 forms forward bias voltage, presents
Forward conduction state, wherein there is electric current ID2 to flow through, and is presented the trend of increase；
In the T3 time periods, LCLC series-parallel circuits are the stage for releasing energy.The T3 time periods are similar with the T1 time periods, be to
Output end provides another main interval of energy.
After the T3 time periods terminate, that is, start the process of T0 time periods, start the circulation of next cycle.
Further, in order to the operation principle of circuit described in the invention is more clearly understood, according to the circuit such as Fig. 2 b,
List input voltage to use compared with low dc voltage, and be output as high voltage；Input voltage is used compared with High Level DC Voltage, and is output as
The work wave of low-voltage；Wherein：
Vhb shows the voltage waveform at first switch pipe K1 and second switch pipe K2 half-bridge circuits midpoint.Its maximum is
The magnitude of voltage of input voltage；
VC1 shows the voltage waveform at the first electric capacity C1 two ends；
Vc2 shows the voltage waveform at the second electric capacity C2 two ends, while that is to say the second inductance L2 and transformer
After series connection, the voltage waveform at its two ends；
Vout shows the voltage waveform at the 5th electric capacity C5 (output capacitance) and first resistor R1 (output load resistance) two ends,
Output voltage waveforms i.e. described under ordinary meaning.
Figure 15-one kind is based under Fig. 2 b circuits, and input voltage is 50V, and output voltage reaches 93.7V, the first electric capacity C1's
Ceiling voltage is 1.09KV, and the ceiling voltage of the second electric capacity C2 is 805V.
Figure 16-one kind is based under Fig. 2 b circuits, and input voltage is 400V, and output voltage reaches 3.19V, the first electric capacity C1's
Ceiling voltage is 504V, and the ceiling voltage of the second electric capacity C2 is 216V.
Further, in order to be more clearly understood in LCLC series-parallel circuits described in the invention between each inductance capacitance
The possibility arrangement of location swap, in fig. 17, lists the connected mode that electric capacity C1 is positioned over bottom；This circuit modifications do not have
There are the primary operating characteristics for changing whole circuit.
Further, in for Figure 17, when electric capacity C1 is positioned over bottom, due in the equivalent method of circuit analysis,
Input voltage is a kind of imaginary short state to whole circuit, and then electric capacity C1 can be split as two：C3 and C4, such as institute in Figure 18
Show, this circuit modifications do not change the primary operating characteristics of whole circuit；
Further, for the possibility change being more clearly understood in LCLC series-parallel circuits described in the invention, Figure 19-
Based under Fig. 2 b circuits, the half-bridge input circuit change being made up of first switch K1 and second switch K2 is by first switch to one kind
The circuit modifications that the full-bridge input circuit of K1, second switch K2, the 3rd switch K3 and the 4th switch K4 compositions is obtained；This circuit
It is that the groundwork that the voltage x current under switching frequency is encouraged is provided for LCLC series-parallel circuits to deform without input circuit is changed
Characteristic；
The another present invention also constructs a kind of Switching Power Supply, and Switching Power Supply includes above-mentioned inductance capacitance connection in series-parallel combinational circuit.
By implementing the present invention, whole circuit is being applicable input wide, output voltage range, the condition of work of big output current
Under, moreover it is possible to reach efficiently, energy-conservation produces small electromagnetic interference, small size, the characteristic of high power density.
Above example only technology design and feature to illustrate the invention, its object is to allow person skilled in the art
Scholar will appreciate that present disclosure and implement accordingly, can not limit the scope of the invention.It is all to be wanted with right of the present invention
The impartial change that scope is done and modification are asked, the covering scope of the claims in the present invention all should be belonged to.
Claims (10)
1. a kind of inductance capacitance connection in series-parallel combinational circuit, it is characterised in that including：Signal input part, the first inductance, the second electricity
Sense, the first electric capacity, the second electric capacity, transformer, the transformer include primary coil and secondary coil, wherein,
Second inductance is connected in series with the primary coil, constitutes LT circuits, and the LT circuits are with second electric capacity simultaneously
Connection connection, constitutes LC parallel circuits；
The LC parallel circuits are connected with first inductance and first capacitances in series, constitute LCLC series-parallel circuits；
The two ends of the LCLC series-parallel circuits connect the signal input part respectively, and the signal input part is input into predeterminated frequency
Voltage excitation signals or current excitation signal, the LCLC series-parallel circuits believe in the voltage excitation signals or current excitation
Number effect is lower produces vibration, and the secondary coil exports predeterminated voltage.
2. inductance capacitance connection in series-parallel combinational circuit according to claim 1, it is characterised in that the signal input part bag
Include：Voltage input end, ON-OFF control circuit, half-bridge circuit, wherein,
The ON-OFF control circuit is connected and controls the half-bridge circuit；The half-bridge circuit connects the voltage input end, obtains
Take input voltage；The two ends of the LCLC series-parallel circuits connect the half-bridge circuit respectively.
3. inductance capacitance connection in series-parallel combinational circuit according to claim 2, it is characterised in that the half-bridge circuit includes：
First switch, second switch,
The ON-OFF control circuit connects the first switch and second switch respectively, the ON-OFF control circuit control described the
The ON/OFF of one switch and second switch；
One end of the first switch connects the voltage input end, and the other end of the first switch connects the second switch
One end, the other end of the second switch connects one end of the LCLC series-parallel circuits, the LCLC series-parallel circuits
The other end connects the tie point of the first switch and second switch.
4. inductance capacitance connection in series-parallel combinational circuit according to claim 2, it is characterised in that first electric capacity includes the
Three electric capacity and the 4th electric capacity, the half-bridge circuit include：First switch, second switch, wherein,
One end of the LC parallel circuits connects the tie point of the first switch and second switch by the inductance L1, described
The other end of LC parallel circuits connects one end of the 3rd electric capacity and the 4th electric capacity respectively, the 3rd electric capacity it is another
The end connection second switch, the other end of the 4th electric capacity connects the voltage input end；
The ON-OFF control circuit connects the first switch and second switch respectively, the ON-OFF control circuit control described the
The ON/OFF of one switch and second switch；
One end of the first switch connects the voltage input end, and the other end of the first switch connects the second switch
One end, the other end of the second switch connects the 3rd electric capacity.
5. the inductance capacitance connection in series-parallel combinational circuit according to claim 3 or 4, it is characterised in that the first switch
One end connects the positive pole of the voltage input end, and the other end of the first switch connects one end of the second switch, described
The other end of second switch connects the negative pole of the voltage input end.
6. inductance capacitance connection in series-parallel combinational circuit according to claim 1, it is characterised in that the signal input part bag
Include：Voltage input end, ON-OFF control circuit, full-bridge circuit, wherein,
The ON-OFF control circuit is connected and controls the full-bridge circuit；The full-bridge circuit connects the voltage input end, obtains
Take input voltage；The two ends of the LCLC series-parallel circuits connect the full-bridge circuit respectively.
7. inductance capacitance connection in series-parallel combinational circuit according to claim 6, it is characterised in that the full-bridge circuit includes：
First switch, second switch, third switch, the 4th switch, wherein,
The ON-OFF control circuit connects the first switch, second switch, third switch, the 4th switch, the switch respectively
Control circuit controls the first switch, second switch, third switch, the ON/OFF of the 4th switch；
One end of the LCLC series-parallel circuits connects the tie point of the first switch and second switch, the LCLC connection in series-parallel
Other end connection the 3rd switch and the tie point of the 4th switch of circuit；
The voltage input end connects one end of the first switch and the 3rd switch respectively；
The other end of the first switch connects one end of the second switch, the other end ground connection of the second switch；
Other end connection the 4th switch of the 3rd switch, the other end ground connection of the 4th switch.
8. inductance capacitance connection in series-parallel combinational circuit according to claim 7, it is characterised in that one end of the first switch
The positive pole of the voltage input end is connected, the other end of the first switch connects one end of the second switch, described second
The other end of switch connects the negative pole of the voltage input end；
One end of 3rd switch connects the positive pole of the voltage input end, the other end connection of the 3rd switch described the
One end of four switches, the other end of the 4th switch connects the negative pole of the voltage input end.
9. inductance capacitance connection in series-parallel combinational circuit according to claim 7, it is characterised in that the first switch, second
Switch, the 3rd switch and the 4th switch are switching tube or metal oxide semiconductor field effect tube.
10. a kind of Switching Power Supply, it is characterised in that the Switching Power Supply includes the inductance electricity described in claim any one of 1-9
Hold connection in series-parallel combinational circuit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022170574A1 (en) * | 2021-02-10 | 2022-08-18 | 华为数字能源技术有限公司 | Direct-current converter, electronic device and charger |
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