CN206595896U - 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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- CN206595896U CN206595896U CN201720214399.2U CN201720214399U CN206595896U CN 206595896 U CN206595896 U CN 206595896U CN 201720214399 U CN201720214399 U CN 201720214399U CN 206595896 U CN206595896 U CN 206595896U
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- 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 utility model is related 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 in series with the first inductance and the first electric capacity, 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 utility model, the output voltage of exportable wide scope, while exportable high current, also meets ZVT, and have the characteristics of electromagnetic interference is small.
Description
Technical field
The utility model is related to field of switch power, more specifically to a kind of inductance capacitance connection in series-parallel combinational circuit
And Switching Power Supply.
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,
USB-PD output voltage ranges (3V-21V) requirement is met, when meeting low-voltage, high-current again and filling technology (be 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 is effectively utilized, but can't be completely secured it is a variety of 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 wide model
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 (be 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
Twice of voltage.When needing the input and output voltage of wide scope, 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 USB-PD output voltage ranges (3V-21V) requirement.
Utility model content
The technical problems to be solved in the utility model is that the drawbacks described above for prior art is electric there is provided a kind of inductance
Hold connection in series-parallel combinational circuit, including：Signal input part, the first inductance, the second inductance, the first electric capacity, the second electric capacity, transformer,
The 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 in series with first inductance and the first electric capacity, composition LCLC connection in series-parallel electricity
Road；
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
Encourage and vibration is produced under signal function, the secondary coil exports predeterminated voltage.
Preferably, inductance capacitance connection in series-parallel combinational circuit described in the utility model, the signal input part includes：Voltage
Input, ON-OFF control circuit, half-bridge circuit, wherein,
The ON-OFF control circuit connects 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 described in the utility model, the half-bridge circuit includes：First opens
Pass, second switch,
The ON-OFF control circuit connects the first switch and second switch respectively, and the ON-OFF control circuit controls institute
State first switch and the ON/OFF of 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 described in the utility model, first electric capacity includes the 3rd electricity
Hold and the 4th electric capacity, the half-bridge circuit includes：First switch, second switch, wherein,
One end of the LC parallel circuits by the inductance L1 connections first switch and the tie point of second switch,
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 first switch and the ON/OFF of 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 described in the utility model, one end connection of the first switch
The positive pole of the voltage input end, the other end of the first switch connects one end of the second switch, the second switch
The other end connect the negative pole of the voltage input end.
Preferably, inductance capacitance connection in series-parallel combinational circuit described in the utility model, the signal input part includes：Voltage
Input, ON-OFF control circuit, full-bridge circuit, wherein,
The ON-OFF control circuit connects 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 described in the utility model, the full-bridge circuit includes：First opens
Pass, 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 3rd switch, the other end ground connection of the 4th switch.
Preferably, inductance capacitance connection in series-parallel combinational circuit described in the utility model, one end connection of the first switch
The positive pole of the voltage input end, the other end of the first switch connects one end of the second switch, the second switch
The other end connect 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 described in the utility model, the first switch, second switch,
3rd switch and the 4th switch be switching tube or metal oxide semiconductor field effect tube.
Another the utility model also constructs a kind of Switching Power Supply, and the Switching Power Supply includes above-mentioned inductance capacitance connection in series-parallel group
Close circuit.
Implement a kind of inductance capacitance connection in series-parallel combinational circuit of the present utility model and Switching Power Supply, with following beneficial effect
Really：The inductance capacitance connection in series-parallel combinational circuit includes：Second inductance is connected in series with primary coil, constitutes LT circuits, LT circuits
It is connected in parallel with the second electric capacity, constitutes LC parallel circuits；LC parallel circuits are connected in series with the first inductance and the first electric capacity,
Constitute LCLC series-parallel circuits；The two ends of LCLC series-parallel circuits connect signal input part respectively, and signal input part input is default
The voltage excitation signals or current excitation signal of frequency, LCLC series-parallel circuits are made in voltage excitation signals or current excitation signal
Vibration, secondary coil output predeterminated voltage are produced with lower.By implementing the utility model, the output voltage of exportable wide scope,
Exportable high current, also meets ZVT, and have the characteristics of electromagnetic interference is small simultaneously.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：
Fig. 1 a- Fig. 1 g are the circuit diagrams of the utility model inductance capacitance connection in series-parallel combinational circuit；
Fig. 2 a are the circuit diagrams that the utility model inductance capacitance connection in series-parallel combinational circuit output end is bridge rectifier；
Fig. 2 b are the circuit diagrams that the utility model inductance capacitance connection in series-parallel combinational circuit output end 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 the utility model inductance capacitance connection in series-parallel combinational circuit；
Fig. 7 to Fig. 8 is T0 periods current flow diagrams and corresponding voltage and current waveform in a complete working period；
Fig. 9 to Figure 10 is T1 periods current flow diagrams and corresponding voltage current waveform in a complete working period
Figure；
Figure 11 to Figure 12 is T2 periods current flow diagrams and corresponding voltage current waveform in a complete working period
Figure；
Figure 13 to Figure 14 is T3 periods current flow diagrams and corresponding voltage current waveform in a complete working period
Figure；
Figure 15 is the voltage oscillogram of the first embodiment of Fig. 2 b circuits；
Figure 16 is the voltage oscillogram of the second embodiment of Fig. 2 b circuits；
Figure 17 to Figure 19 is the circuit diagram of the embodiment of the utility model some deformation circuits of equal value.
Embodiment
In order to be more clearly understood to technical characteristic of the present utility model, purpose and effect, accompanying drawing is now compareed detailed
Illustrate embodiment of the present utility model.
The utility model 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, wherein,
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 induction reactance characteristic is presented in the second inductance L2 herein, can be by it
He has the electronic original part or circuit realiration of induction reactance characteristic, and it acts on the same, belongs to protection domain of the present utility model.Together
Capacitive reactance characteristic is presented in reason, the second electric capacity C2 herein, the electronic original part or circuit realiration can by other with capacitive reactance characteristic, and it is made
With the same, protection domain of the present utility model is belonged to.
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 induction reactance characteristic is presented in the first inductance L1 herein, can have by other
The electronic original part or circuit realiration of induction reactance characteristic, it acts on the same, belongs to protection domain of the present utility model.Similarly,
Capacitive reactance characteristic is presented in one electric capacity C1 herein, the electronic original part or circuit realiration can by other with capacitive reactance characteristic, and it acts on one
Sample, belong to protection domain of the present utility model.
It will be understood by those skilled in the art that on the basis of the technical program, other periphery electricity such as addition series resistance
Road, belonging to does not influence the circuit modifications of the technical program essence, belongs to protection domain of the present utility model.
It should be noted that the utility model 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 to shake
Swing, secondary coil T21 output predeterminated voltages.
Specifically, based on above-mentioned principle, circuit of the present utility model has various structures, as shown in Fig. 1 a- Fig. 1 g, is
The circuit diagram of some embodiments of the utility model inductance capacitance connection in series-parallel combinational circuit.
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 are according to above-mentioned principle, in specific implementation circuit, 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；The electronic original part with capacitive reactance characteristic can be passed through
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 illustrated, and is not used to limit the specific constructive form of circuit, circuit is entered based on the application principle
Capable equivalence transformation, belongs to protection domain of the present utility model.
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 difference of LCLC series-parallel circuits
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 first switch K1 and second switch K2 ON/OFF；
First switch K1 one end connection voltage input end, the one of first switch K1 other end connection second switch K2
End, the second switch K2 other end connects one end of LCLC series-parallel circuits, the other end connection first of LCLC series-parallel circuits
Switch K1 and second switch K2 tie point.
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
One end of four electric capacity C4, LC parallel circuits passes through inductance L1 connection first switch K1 and second switch K2 tie point, LC parallel connections
The other end of circuit connects the 3rd electric capacity C3 and the 4th electric capacity C4 one end, the 3rd electric capacity C3 other end connection second respectively
Switch K2, the 4th electric capacity C4 other end connection voltage input end；ON-OFF control circuit connects first switch K1 and second respectively
K2 is switched, ON-OFF control circuit controls first switch K1 and second switch K2 ON/OFF；First switch K1 one end connection voltage
Input, first switch K1 other end connection second switch K2 one end, the second switch K2 other end connects the 3rd electric capacity
C3。
Preferably, first switch K1 one end connects the positive pole of voltage input end, first switch K1 other end connection the
Two switch K2 one end, the second switch K2 other end 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 difference of LCLC series-parallel circuits
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 4th switch K4 ON/OFF；One end connection first of LCLC series-parallel circuits
K1 and second switch K2 tie point 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 the switches of first switch K1 and the 3rd K3 one end respectively；First switch K1 other end connection
Second switch K2 one end, second switch K2 other end ground connection；3rd switch K3 other end connection the 4th switchs K4, the 4th
Switch K4 other end ground connection.
Preferably, first switch K1 one end connects the positive pole of voltage input end, first switch K1 other end connection the
Two switch K2 one end, the second switch K2 other end connects the negative pole of voltage input end；3rd switch K3 one end connection electricity
The positive pole of input is pressed, the 3rd switch K3 other end connection the 4th switchs K4 one end, the 4th switch K4 other end connection
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, it also may be selected in first switch K1, second switch K2, the 3rd switch K3 and the 4th switch K4
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 present utility model and sheet are illustrated by specific embodiment
The technique effect that utility model can reach.
It is the circuit diagram that the utility model inductance capacitance connection in series-parallel combinational circuit output end is bridge rectifier such as Fig. 2 a；Such as
Fig. 2 b, are originally the circuit diagrams that the utility model inductance capacitance connection in series-parallel combinational circuit output end is full-wave rectification.
In Fig. 2 a and Fig. 2 b, the load circuit of transformer T1 secondary coil T21 connection output ends is used only to explanation
Integrality and the course of work of the present utility model, not the connection load to output end are limited, and those skilled in the art can root
According to specifically need set output end connection.
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, transformer T1 secondary coil T21 and T22, output commutation diode D1 and D2, output capacitance C5 and negative
Resistance R1 is carried, wherein,
ON-OFF control circuit connects and controls first switch K1 and second switch K2；First switch K1 one end connection voltage
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.
Primary coil T11 Same Name of Ends (having sign round dot) connection inductance L2 one end, constitutes LT circuits；Primary coil
The T11 other end connects the negative pole of voltage input end.Inductance L2 other end connection electric capacity C2 one end, the electric capacity C2 other end
The primary coil T11 other end is connected, lc circuit is constituted；Inductance L2 other end connection electric capacity C1 one end, electric capacity C1's is another
One end connection inductance L1 one end, constitutes LCLC series-parallel circuits；Inductance L1 other end connection first switch K1 and second is opened
Close K2 tie point.
Secondary coil T21 Same Name of Ends (having sign round dot) connection diode D1 positive pole, secondary coil T21's is another
End connection secondary coil T22 Same Name of Ends (having sign round dot), secondary coil T22 other end connection diode D2 positive pole；
Diode D1 negative pole connection diode D2 negative pole；Diode D1 negative pole is (defeated by parallel connection the 5th electric capacity C5 and resistance R1
Go out load resistance) connection secondary coil T22 Same Name of Ends.
It is appreciated that ON-OFF control circuit is used for the turn-on and turn-off for controlling first switch pipe K1 and second switch pipe K2,
So as to form pumping signal in LCLC series-parallel circuits.The utility model is not limited the specific implementation for controlling circuit
It is fixed, 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 of category oxide semiconductor field effect pipe is also shown 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 present utility model, now enumerate concrete numerical value and illustrate.
Input voltage uses 80VDC DC voltages, and ON-OFF control circuit control frequency is reached when first resistor R1 resistance
It is worth for 3 Ω, while when the magnitude of voltage at first resistor R1 two ends is 16.8V, obtaining the electricity of the main node of each in circuit or device
Current voltage waveform, with reference to Fig. 6, Fig. 6 is the voltage x current figure of the utility model inductance capacitance connection in series-parallel combinational circuit, wherein：
Vhb shows first switch pipe K1 and the voltage waveform at 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 current waveform flowed through in the first inductance L1, the first electric capacity C1；
IL2 shows the electric current flowed through in the second inductance L2, the current wave also as flowed through in transformer T1 primary coils T11
Shape；Wherein, met between IC2, Iin, 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 second commutation diode D2 two ends
Voltage waveform；
Vout shows the voltage waveform at the 5th electric capacity C5 (output capacitance) and first resistor R1 (output load resistance) two ends,
Described output voltage waveforms i.e. under ordinary meaning.
Further, it is complete to one at this for the operation principle of circuit described by the utility model is more clearly understood
The voltage current waveform of the different time sections of work period, carries out labor；With reference to Fig. 7 to Figure 16, wherein,
Fig. 7 to Fig. 8 is T0 periods current flow diagrams and corresponding voltage and current waveform in a complete working period；
Fig. 9 to Figure 10 is T1 periods current flow diagrams and corresponding voltage current waveform in a complete working period
Figure；
Figure 11 to Figure 12 is T2 periods current flow diagrams and corresponding voltage current waveform in a complete working period
Figure；
Figure 13 to Figure 14 is T3 periods current flow diagrams and corresponding voltage current waveform in a complete working period
Figure；
Figure 15 is the voltage oscillogram of the first embodiment of Fig. 2 b circuits；
Figure 16 is the voltage oscillogram of the second embodiment of Fig. 2 b circuits.
Specifically, such as Fig. 7 and Fig. 8, in the T0 periods：
Period shown by dash area：That is first switch pipe K1 and second switch pipe K2 control end input voltage are all
It is 0 for low potential, i.e. magnitude of voltage, first switch pipe K1 and second switch pipe K2 are off state；
In the T0 periods, the Iin senses of current be from LCLC combinational circuits flow to half-bridge mid point-continuity circuit in electric current side
To, formed to first switch pipe K1 junction capacity discharge and second switch pipe K2 junction capacity charge function；Complete to open to first
Pipe K1 and second switch pipe K2 junction capacity discharge and recharges are closed, is completed after the conversion of half-bridge mid point (tie point) point position from low to high,
Vhb- is that high potential-add equal to input voltage is presented in the midpoint of the half-bridge circuit of first switch pipe K1 and second switch pipe K2 compositions
The forward conduction voltage drop of upper first switch pipe K1 body diodes, i.e. Iin electric currents continue circuit state, pass through first switch pipe K1
Body diode flow through electric current；
In the T0 periods, the IL2 senses of current are to be flowed to and transformer from the second electric capacity C2 connection end
The trend reduced is presented in connection end, current absolute value.
In the T0 periods, in the secondary end of transformer, i.e. secondary coil T21, T22 Same Name of Ends formation low potential；Exist
First diode D1 two ends form 2 times that reverse bias voltage-its magnitude of voltage is output voltage values, without electric current, present
Open-circuit condition；Forward bias voltage is formed at the second diode D2 two ends, forward conduction state is presented, wherein there are electric current ID2 streams
Cross, and the trend of absolute value increase is presented.
In the T0 periods, LCLC series-parallel circuits are the stage released energy.The energy stored in LCLC series-parallel circuits
To the electric discharge of first switch pipe K1 junction capacity and the charging of second switch pipe K2 junction capacity, and there is portion of energy to flow back to input voltage source,
Supply of the energy to output end is maintained simultaneously.
In such as Fig. 9 and Figure 10, in the T1 periods：
Period shown by dash area：I.e. first switch pipe K1 control end input voltage is high potential, i.e. voltage
It is worth for 1, first switch pipe K1 is conducting state；Second switch pipe K2 control end input voltage is that low potential, i.e. magnitude of voltage are
0, second switch pipe K2 are off state；Vhb- be first switch pipe K1 and second switch pipe K2 composition half-bridge circuit in
Point for high potential-be equal to input voltage.
In the T1 periods, the Iin senses of current form to flow to LCLC combinational circuits from half-bridge mid point and combine electricity to LCLC
Road and the process of transformer charging, input fill energy to whole circuit；
In the T1 periods, the IL2 senses of current are to be flowed to from the connection end of transformer with the second electric capacity C2's
Connection end, electric current is presented by just profound ripple trend-from less than zero, to zero passage, to maximum, to progressively reducing but be still more than zero
Process.
It is interval in the leading portion of T1 periods, when the electric current IL2 in the second inductance L2 is not equal in transformer
During exciting current, in transformer secondary coil T21, T22 Same Name of Ends formation 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, and 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 periods close to the interval terminated, in the primary side of transformer, when the electric current IL2 in the second inductance L2 is with becoming
After the equal intersection of exciting current in depressor primary coil, the induced electromotive force phase in transformer coil is inverted, secondary
Level coil T21, T22 Same Name of Ends formation 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 formation reverse bias voltage-its electricity
Pressure value is 2 times of output voltage values, without electric current, and open-circuit condition is presented；
The T1 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 periods：
Period shown by dash area：That is first switch pipe K1 and second switch pipe K2 control end input voltage are all
It is 0 for low potential, i.e. magnitude of voltage, first switch pipe K1 and second switch pipe K2 are off state；
In the T2 periods, the Iin senses of current form to flow to LCLC combinational circuits from half-bridge mid point and give first switch pipe K1
The function that junction capacity is charged and second switch pipe K2 junction capacity is discharged；Complete to tie to first switch pipe K1 and second switch pipe K2
Capacitor charge and discharge, is completed after the conversion of half-bridge mid point current potential from high to low, Vhb- is first switch pipe K1 and second switch pipe K2
Low potential-upper second switch pipe K2 bodies two also lower than input voltage negative reference point are presented in the midpoint of the half-bridge circuit of composition
The forward conduction voltage drop of pole pipe.I.e. Iin electric currents continue circuit state, and electricity is flowed through by second switch pipe K2 body diode
Stream；
In the T2 periods, the IL2 senses of current are to be flowed to from the connection end of transformer with the second electric capacity C2's
The trend reduced is presented in connection end, current absolute value.
In the T2 periods, in the secondary end of transformer, i.e. secondary coil T21, T22 Same Name of Ends formation 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 is 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 periods, LCLC series-parallel circuits are the stage released energy.The energy stored in LCLC series-parallel circuits
To the charging of first switch pipe K1 junction capacity and the electric discharge of second switch pipe K2 junction capacity, while maintaining supply of the energy to output end.
Such as Figure 13 and Figure 14, in the T3 periods：
Period shown by dash area：I.e. first switch pipe K1 control end input voltage is all low potential, i.e., electric
Pressure value is 0, and first switch pipe K1 is off state；Second switch pipe K2 control end input voltage is high potential, i.e. magnitude of voltage
For 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 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 periods, the IL2 senses of current are to be flowed to and transformer from the second electric capacity C2 connection end
Connection end, electric current is presented by just profound ripple trend-from less than zero, to zero passage, to maximum, to progressively reducing but be still more than zero
Process.
It is interval in the leading portion of T3 periods, when the electric current IL2 in the second inductance L2 is not equal in transformer
During exciting current, in transformer secondary coil T21, T22 Same Name of Ends formation high potential；That is the first diode D1 formation forward bias
Voltage is put, forward conduction state is presented, wherein there is electric current ID1 to flow through；Second diode D2 formation reverse bias voltages, its voltage
It is worth for 2 times of output voltage values, without electric current, open-circuit condition is presented；
In the T3 periods close to the interval terminated, in the primary side of transformer, when the electric current IL2 in the second inductance L2 is with becoming
After the equal intersection of exciting current in depressor primary coil, the induced electromotive force phase in transformer coil is inverted, secondary
Level coil T21, T22 Same Name of Ends formation low potential；Reverse bias voltage, its magnitude of voltage are formed at the first diode D1 two ends
For 2 times of output voltage values, without electric current, open-circuit condition is presented；Second diode D2 formation forward bias voltages, are presented
Forward conduction state, wherein there is electric current ID2 to flow through, and is presented the trend of increase；
In the T3 periods, LCLC series-parallel circuits are the stage released energy.The T3 periods are similar with the T1 periods, for
Output end provides another main interval of energy.
After the T3 periods terminate, that is, start the process of T0 periods, start the circulation of next cycle.
Further, in order to which the operation principle of circuit described by the utility model is more clearly understood, according to such as Fig. 2 b
Circuit, lists input voltage and uses compared with low dc voltage, and is output as high voltage；Input voltage is used compared with High Level DC Voltage, and
It is output as the work wave of low-voltage；Wherein：
Vhb shows first switch pipe K1 and the voltage waveform at 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,
Described output voltage waveforms i.e. 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 second electric capacity C2 ceiling voltage 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 second electric capacity C2 ceiling voltage is 216V.
Further, in order to each inductance capacitance in LCLC series-parallel circuits described by the utility model is more clearly understood
Between location swap possibility arrangement, in fig. 17, list the connected mode that electric capacity C1 is positioned over bottom；This circuit becomes
Shape does not change the primary operating characteristics of whole circuit.
Further, in 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 by the utility model,
Figure 19-one kind is based under Fig. 2 b circuits, and the half-bridge input circuit change being made up of first switch K1 and second switch K2 is by the
The circuit modifications that the full-bridge input circuit of one switch K1, second switch K2, the 3rd switch K3 and the 4th switch K4 compositions is obtained；
It is that the voltage x current provided for LCLC series-parallel circuits under switching frequency is encouraged that this circuit modifications, which do not change input circuit,
Primary operating characteristics；
Another the utility model also constructs a kind of Switching Power Supply, and Switching Power Supply includes above-mentioned inductance capacitance connection in series-parallel combination electricity
Road.
By implementing the utility model, whole circuit is being applicable wide input, output voltage range, the work of big output current
Under the conditions of, moreover it is possible to reach efficiently, energy-conservation produces small electromagnetic interference, small size, the characteristic of high power density.
Above example is only to illustrate technical concepts and features of the present utility model, and its object is to allow be familiar with technique
Personage can understand content of the present utility model and implement accordingly, protection domain of the present utility model can not be limited.It is all with
The equivalent changes and modifications that the utility model right is done, all should belong to the utility model claim covers model
Enclose.
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, the LT circuits and second electric capacity are simultaneously
Connection connection, constitutes LC parallel circuits；
The LC parallel circuits are connected in series with first inductance and first electric capacity, 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 inputs 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 connects 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 is described by the inductance L1 connections first switch and the tie point of second switch
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 connects 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
Circuit is controlled to control 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 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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| CN106877671A (en) * | 2017-03-06 | 2017-06-20 | 郭志邦 | A kind of inductance capacitance connection in series-parallel combinational circuit and Switching Power Supply |
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| CN106877671A (en) * | 2017-03-06 | 2017-06-20 | 郭志邦 | A kind of inductance capacitance connection in series-parallel combinational circuit and Switching Power Supply |
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