CN102769377B - Non-isolated variable flow topological structure based on phase shift control and application thereof - Google Patents
Non-isolated variable flow topological structure based on phase shift control and application thereof Download PDFInfo
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- CN102769377B CN102769377B CN201210235964.5A CN201210235964A CN102769377B CN 102769377 B CN102769377 B CN 102769377B CN 201210235964 A CN201210235964 A CN 201210235964A CN 102769377 B CN102769377 B CN 102769377B
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- 230000010363 phase shift Effects 0.000 title abstract description 4
- 239000003990 capacitor Substances 0.000 claims abstract description 103
- 230000001131 transforming effect Effects 0.000 claims description 18
- 238000002955 isolation Methods 0.000 claims description 13
- 230000000295 complement effect Effects 0.000 claims description 12
- 239000004065 semiconductor Substances 0.000 claims description 8
- 230000024241 parasitism Effects 0.000 description 8
- 230000000630 rising effect Effects 0.000 description 8
- 230000005611 electricity Effects 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Abstract
The invention provides a non-isolated variable flow topological structure based on phase shift control, comprising a switch capacitor circuit and a transformer circuit, wherein the switch capacitor circuit consists of two switching tubes, one high voltage capacitor, one resonant capacitor and one resonant inductor in a connection way; and the transformer circuit consists of two switching tubes, one high voltage capacitor and one filter inductor in a connection way. The invention also discloses a converter which adopts the topological structure. Through the control on the phase shift angles and the duty ratios of the various switching tubes, the control on the voltage balance of all the capacitors in the energy flowing direction and at the high voltage side is realized, and the adjustment of output voltage in a wide range, and the connection and disconnection of each switching tube with zero voltage are realized. With the adoption of a structure that multiple groups of switch capacitor circuits are connected in cascade, the converter disclosed by the invention realizes the output at a higher step-down ratio, so that the voltage stresses of all the components are reduced; and additionally, since the step-down ratio of the converter is further improved by the transformer circuit, not only is the voltage stress reduced, but also the adjustable output voltage is implemented.
Description
Technical field
The invention belongs to electric power Semiconductor Converting Technology field, be specifically related to a kind of non-isolation type unsteady flow topological structure and application thereof based on phase shifting control.
Background technology
In recent years, the shortage of the energy and the pollution of environment have become the focus in the world, and the development of regenerative resource and application are subject to the extensive concern of countries in the world.In renewable energy system, the electric energy that many regenerative resources are sent is all the direct current that voltage is lower, and need to grid transmission the direct current that voltage is higher, therefore need DC-DC converter that low voltage and direct current is converted to and is applicable to grid-connected high-voltage direct-current electricity, so low input ripple, high-gain, high efficiency converter have important effect in regenerative resource is generated electricity by way of merging two or more grid systems field; Some is lower by the operating voltage of electric loading simultaneously, also needs DC-DC converter high-voltage direct-current electricity to be converted to the low voltage and direct current being applicable to by electric loading.
Traditional BUCK current transformer as shown in Figure 1, it is simple in structure, be widely used, but the power switch pipe of this current transformer works in hard switching state, the voltage stress of switching loss and power switch pipe is all larger, and under the application scenario of high step-down ratio, input side current fluctuation is larger, outlet side uses larger series inductance further to increase cost and volume and reduced efficiency.
As shown in Figure 2, its topological structure can be realized high step-down ratio by transformer voltage ratio to traditional circuit of reversed excitation, but the transmission of all power all needs through magnetic core, has increased to a certain extent current transformer volume and has brought certain electromagnetic interference problem.
In succession occurred in recent years some switching capacity type current transformers, this quasi-converter, on the basis of equal die mould switching capacity code converter topology, increases and has resonance phase-shift circuit to realize the soft switch of power switch pipe; Its typical resonant switch capacitance convertor topological structure as shown in Figure 3, this topological structure has advantages of Zero Current Switch, but the output voltage of resonant switch capacitance convertor is determined by the concrete topological structure of circuit, cannot recently control output voltage by duty, limited to the adjustable extent of current transformer output voltage, and energy cannot two-way flow.
Summary of the invention
For the existing above-mentioned technological deficiency of prior art, the invention provides a kind of non-isolation type unsteady flow topological structure and application thereof based on phase shifting control, pressure drop ratio is high, simple in structure, and efficiency is high, and output voltage is adjustable.
A non-isolation type unsteady flow topological structure based on phase shifting control, comprises a switched-capacitor circuit and a transforming circuit;
Described switched-capacitor circuit is by two switching tube S
1～S
2, a high-voltage capacitance C
1, a resonant capacitance C
rwith a resonant inductance L
rcomposition; Wherein, switching tube S
1input and high-voltage capacitance C
1one end be connected, switching tube S
1output and switching tube S
2input and resonance inductance L
rone end be connected, switching tube S
2output and high-voltage capacitance C
1the other end be connected, resonant inductance L
rthe other end and resonant capacitance C
rone end be connected, resonant capacitance C
rthe other end be connected with transforming circuit;
Described transforming circuit is by two switching tube S
3～S
4, a high-voltage capacitance C
2with a filter inductance L
fcomposition; Wherein, switching tube S
3input and high-voltage capacitance C
2one end and switched-capacitor circuit mesohigh capacitor C
1the other end be connected, switching tube S
3output and switching tube S
4input, filter inductance L
fone end and switched-capacitor circuit in resonant capacitance C
rthe other end be connected, switching tube S
4output and high-voltage capacitance C
2the other end be connected;
The control end of described switching tube receives the control signal that external equipment provides.
High-voltage capacitance C
1one end and high-voltage capacitance C
2the other end form high-pressure side, filter inductance L
fthe other end and high-voltage capacitance C
2the other end form low-pressure side;
When high-pressure side as input low-pressure side as when output, described filter inductance L
fthe other end and high-voltage capacitance C
2the other end between be connected with output capacitance C
out.
Described switching tube S
1the control signal and the switching tube S that receive
2the control signal phase place that receives is complementary and have an interval, dead band; Switching tube S
3the control signal and the switching tube S that receive
4the control signal phase place that receives is complementary and have an interval, dead band; Switching tube S
1the control signal and the switching tube S that receive
3the control signal duty ratio that receives is identical and have a phase shifting angle.
Preferably, described switching tube is metal-oxide-semiconductor; Metal-oxide-semiconductor switching frequency is high, and device carries anti-and diode, and the topological structure volume that uses metal-oxide-semiconductor to build is less, and power density is high.
The principle of unsteady flow topological structure of the present invention is: by control switch pipe S
1control signal and switching tube S
3the phase shifting angle of control signal realize the balanced and power flow direction control of high-voltage capacitance; In the time that phase shifting angle is 0, high-voltage capacitance C
1with high-voltage capacitance C
2between transmitting energy not, electric voltage equalization; (S in the time that phase shifting angle is greater than 0
1have precedence over S
3conducting), C
1to C
2transmitting energy, system is from high side to low side transmitting energy; (S in the time that phase shifting angle is less than 0
1lag behind S
3conducting), C
2to C
1transmitting energy, system is from low-pressure side to high-pressure side transmitting energy.In the time of high side to low side through-put power, by capacitor C
2, switching tube S
3and S
4, filter inductance L
fwith output capacitance C
outform a BUCK circuit, adjust phase shifting angle, can make C
2upper voltage is the half of high-pressure side input voltage, and low-pressure side output voltage is C
2upper voltage and S
1the product of the duty ratio D of control signal.When low-pressure side is during to high-pressure side through-put power, capacitor C
2, switching tube S
3and S
4with filter inductance L
fform a BOOST circuit, C
2upper voltage be low-pressure side input voltage divided by duty ratio D, adjust phase shifting angle, can make on high-tension side output voltage is capacitor C
2the twice of voltage.
A non-isolation type current transformer based on phase shifting control, comprises n switched-capacitor circuit and a transforming circuit, and n switched-capacitor circuit successively cascade forms, and n is greater than 1 natural number;
Described switched-capacitor circuit is by two switching tube S
1～S
2, a high-voltage capacitance C
1, a resonant capacitance C
rwith a resonant inductance L
rcomposition; Wherein, switching tube S
1input and high-voltage capacitance C
1one end be connected and be the first input end of switched-capacitor circuit, switching tube S
1output and switching tube S
2input and resonance inductance L
rone end be connected and be the second input of switched-capacitor circuit, switching tube S
2output and high-voltage capacitance C
1the other end be connected and be the first output of switched-capacitor circuit, resonant inductance L
rthe other end and resonant capacitance C
rone end be connected, resonant capacitance C
rthe other end second output that is switched-capacitor circuit;
The first output of i-1 switched-capacitor circuit is connected with the first input end of i switched-capacitor circuit, and the second output of i-1 switched-capacitor circuit is connected with the second input of i switched-capacitor circuit, and i is natural number and 2≤i≤n;
Described transforming circuit is by two switching tube S
3～S
4, a high-voltage capacitance C
2with a filter inductance L
fcomposition; Wherein, switching tube S
3input and high-voltage capacitance C
2one end and the first output of n switched-capacitor circuit be connected, switching tube S
3output and switching tube S
4input, filter inductance L
fone end and the second output of n switched-capacitor circuit be connected, switching tube S
4output and high-voltage capacitance C
2the other end be connected;
The control end of described switching tube receives the control signal that external equipment provides.
The first input end of the 1st switched-capacitor circuit and high-voltage capacitance C
2the other end form high-pressure side, filter inductance L
fthe other end and high-voltage capacitance C
2the other end form low-pressure side;
When high-pressure side as input low-pressure side as when output, described filter inductance L
fthe other end and high-voltage capacitance C
2the other end between be connected with output capacitance C
out.
Described switching tube S
1the control signal and the switching tube S that receive
2the control signal phase place that receives is complementary and have an interval, dead band; Switching tube S
3the control signal and the switching tube S that receive
4the control signal phase place that receives is complementary and have an interval, dead band; Switching tube S
1the control signal and the switching tube S that receive
3the control signal duty ratio that receives is identical and have a phase shifting angle.
The principle of current transformer of the present invention is: by control switch pipe S
1control signal and switching tube S
3the phase shifting angle of control signal realize the balanced and power flow direction control of high-voltage capacitance; In the time that phase shifting angle is 0, transmitting energy not between each high-voltage capacitance, also transmitting energy not of system;
(S in i-1 switched-capacitor circuit in the time that phase shifting angle is greater than 0
1have precedence over S in i switched-capacitor circuit
1conducting, S in the 5th switched-capacitor circuit
1have precedence over S
3conducting), C in i-1 switched-capacitor circuit
1to C in i switched-capacitor circuit
1transmitting energy, C in the 5th switched-capacitor circuit
1to C
2transmitting energy, system is from high side to low side transmitting energy;
(S in i-1 switched-capacitor circuit in the time that phase shifting angle is less than 0
1lag behind S in i switched-capacitor circuit
1conducting, S in the 5th switched-capacitor circuit
1lag behind S
3conducting), C in i switched-capacitor circuit
1to C in i-1 switched-capacitor circuit
1transmitting energy, C
2to C in the 5th switched-capacitor circuit
1transmitting energy, system is from low-pressure side to high-pressure side transmitting energy.
In the time of high side to low side through-put power, by capacitor C
2, switching tube S
3and S
4, filter inductance L
fwith output capacitance C
outform a BUCK circuit, adjust phase shifting angle, can make each high-voltage capacitance all press and be the 1/n+1 of high-pressure side input voltage, low-pressure side output voltage is C
2upper voltage and S
1the product of the duty ratio D of control signal, system no-load voltage ratio is D/n+1.When low-pressure side is during to high-pressure side through-put power, capacitor C
2, switching tube
s3 and S
4with filter inductance L
fform a BOOST circuit, C
2upper voltage be low-pressure side input voltage divided by duty ratio D, adjust phase shifting angle, can make each high-voltage capacitance all press, and on high-tension side output voltage is capacitor C
2doubly, system no-load voltage ratio is n+1/D to the n+1 of voltage.
Unsteady flow structure of the present invention, by the control to phase shifting angle between transforming circuit and switched-capacitor circuit, has realized the control of the each capacitance voltage balance of energy flow direction and high-pressure side; By the control to upper switching tube duty ratio in circuit, realize the adjusting of output voltage wide region; Utilize the parasitic capacitance of switching tube can realize the no-voltage shutoff of each switching tube simultaneously; Utilize the method for resonant circuit phase shifting control, the no-voltage that can realize each switching tube is open-minded.The higher step-down ratio output of converter is organized switched-capacitor circuit cascade structure more and has been realized in current transformer utilization of the present invention, reduces each device voltage stress, utilizes transforming circuit further to improve the step-down ratio of converter, reduce voltage stress, and it is adjustable to realize output voltage.
Brief description of the drawings
Fig. 1 is the structural representation of traditional B UCK convertor circuit.
Fig. 2 is the structural representation of traditional inverse-excitation type convertor circuit.
Fig. 3 is the structural representation of resonant switch electric capacity convertor circuit.
Fig. 4 is the schematic diagram of unsteady flow topological structure of the present invention.
Working waveform figure when Fig. 5 is unsteady flow topological structure decompression mode of the present invention.
Working waveform figure when Fig. 6 is unsteady flow topological structure boost mode of the present invention.
Fig. 7 is the structural representation of current transformer of the present invention.
Embodiment
In order more specifically to describe the present invention, below in conjunction with the drawings and the specific embodiments, technical scheme of the present invention is elaborated.
As shown in Figure 4, a kind of non-isolation type unsteady flow topological structure based on phase shifting control, comprises a switched-capacitor circuit and a transforming circuit;
Switched-capacitor circuit is by two switching tube S
1～S
2, a high-voltage capacitance C
1, a resonant capacitance C
rwith a resonant inductance L
rcomposition; Wherein, switching tube S
1input and high-voltage capacitance C
1one end be connected, switching tube S
1output and switching tube S
2input and resonance inductance L
rone end be connected, switching tube S
2output and high-voltage capacitance C
1the other end be connected, resonant inductance L
rthe other end and resonant capacitance C
rone end be connected, resonant capacitance C
rthe other end be connected with transforming circuit;
Transforming circuit is by two switching tube S
3～S
4, a high-voltage capacitance C
2, an output capacitance C
outwith a filter inductance L
fcomposition; Wherein, switching tube S
3input and high-voltage capacitance C
2one end and switched-capacitor circuit mesohigh capacitor C
1the other end be connected, switching tube S
3output and switching tube S
4input, filter inductance L
fone end and switched-capacitor circuit in resonant capacitance C
rthe other end be connected, switching tube S
4output and high-voltage capacitance C
2the other end be connected; Filter inductance L
fthe other end and high-voltage capacitance C
2the other end between be connected with output capacitance C
out.
High-voltage capacitance C
1one end and high-voltage capacitance C
2the other end form high-pressure side external high voltage power supply or high-voltage load, filter inductance L
fthe other end and high-voltage capacitance C
2the other end form low-pressure side external low-tension supply or low-voltage load.
The control end of switching tube receives the control signal that external equipment provides; In present embodiment, switching tube S
1the control signal and the switching tube S that receive
2the control signal phase place that receives is complementary and have an interval, dead band; Switching tube S
3the control signal and the switching tube S that receive
4the control signal phase place that receives is complementary and have an interval, dead band; Switching tube S
1the control signal and the switching tube S that receive
3the control signal duty ratio that receives is identical and have a phase shifting angle.
Present embodiment is because the needs nature that powers on is all pressed, therefore C
1=C
2, switching tube employing N-type metal-oxide-semiconductor and each switching tube parameter are basic identical.
In the time that phase shifting angle is 0, resonant inductance L
relectric current is 0, C
1, C
2between transmitting energy not, electric voltage equalization;
(S in the time that phase shifting angle is greater than 0
1have precedence over S
3), as shown in Figure 5, C
1to C
2transmitting energy, system is from high side to low side transmitting energy, capacitor C
2, switching tube S
3and S
4, filter inductance L
fwith output capacitance C
outform a BUCK circuit, adjust phase shifting angle, can make C
2upper voltage is the half of high-pressure side input voltage, and low-pressure side output voltage is C
2the product of upper voltage and duty ratio D; Working state of system is as follows:
Stage 1 (t
0-t
1) S
1, S
2dead band, S
1parasitic capacitance discharge, S
2parasitic capacitance charging; S
4conducting, L
frelease energy to low-pressure side.S
2have no progeny in pass, resonant inductance L
rto S
1, S
2contact is filled with electric current, due to S
2parasitic capacitance exist, therefore the S that flows through
2electric current be zero, voltage rising is to V
c1, realize soft shutoff.
Stages 2 (t
1-t
2) S
1, S
4conducting, high-pressure side starts to C
rcharging.S
2parasitic capacitance voltage rise to V
c1after, S
1the anti-and diode current flow of parasitism, its drain-source voltage is 0, now opens switching tube S
1, realize no-voltage open-minded.
Stages 3 (t
2-t
3) S
1, S
4conducting, high-pressure side is to C
rcharging, C
relectric current just becomes, S
1forward conduction.
Stages 4 (t
3-t
4) S
3, S
4dead band, S
3parasitic capacitance discharge, S
4parasitic capacitance charging.S
4have no progeny in pass, resonant inductance L
rto S
3, S
4contact is filled with electric current, due to S
4parasitic capacitance exist, therefore the S that flows through
4electric current be zero, voltage rising is to V
c2, realize soft shutoff.
Stages 5 (t
4-t
5) S
1, S
3conducting, C
rstart to absorb C
1energy, its electric current is larger, C
1, C
2between isolated island absorb electric charge.S
4parasitic capacitance voltage rise to V
c2after, S
3the anti-and diode current flow of parasitism, its drain-source voltage is 0, now opens switching tube S
3, realize no-voltage open-minded.
Stages 6 (t
5-t
6) S
1, S
3conducting, C
rcontinue to absorb C
1energy, its electric current reduces, C
1, C
2between isolated island emit electric charge, S
3forward conduction.
Stages 7 (t
6-t
7) S
1, S
2dead band, S
2parasitic capacitance discharge, S
1parasitic capacitance charging.S
1have no progeny in pass, resonant inductance L
rfrom S
1, S
2contact absorbing current, due to S
1parasitic capacitance exist, therefore the S that flows through
1electric current be zero, voltage rising is to V
c2, realize soft shutoff.
Stages 8 (t
7-t
8) S
2, S
3conducting, C
rstart to release energy.S
1parasitic capacitance voltage rise to V
c1after, S
2the anti-and diode current flow of parasitism, its drain-source voltage is 0, now opens switching tube S
2, realize no-voltage open-minded.
Stages 9 (t
8-t
9) S
2, S
3conducting, C
rcontinue to release energy, C
relectric current becomes negative, S
2forward conduction.
Stages 10 (t
9-t
10) S
3, S
4dead band, S
4parasitic capacitance discharge, S
3parasitic capacitance charging.S
3have no progeny in pass, resonant inductance L
rfrom S
3, S
4contact absorbing current, due to S
3parasitic capacitance exist, therefore the S that flows through
3electric current be zero, voltage rising is to V
c2, realize soft shutoff.
Stages 11 (t
10-t
11) S
2, S
4conducting, C
rgive C
2release energy.S
3parasitic capacitance voltage rise to V
c2after, S
4the anti-and diode current flow of parasitism, its drain-source voltage is 0, now opens switching tube S
4, realize no-voltage open-minded;
(S in the time that phase shifting angle is less than 0
1lag behind S
3), as shown in Figure 6, C
2to C
1transmitting energy, system is from low-pressure side to high-pressure side transmitting energy, capacitor C
2, switching tube S
3and S
4with filter inductance L
fform a BOOST circuit and (remove output capacitance C
out), C
2upper voltage be low-pressure side input voltage divided by duty ratio D, adjust phase shifting angle, can make on high-tension side output voltage is capacitor C
2the twice of voltage; Working state of system is as follows:
Stage 1 (t
0-t
1) S
3, S
4dead band, S
3parasitic capacitance discharge, S
4parasitic capacitance charging.S
4have no progeny in pass, resonant inductance L
rto S
3, S
4contact is filled with electric current, due to S
4parasitic capacitance exist, therefore the S that flows through
4electric current be zero, voltage rising is to V
c2, realize soft shutoff.
Stages 2 (t
1-t
2) S
2, S
3conducting, C
rstart to release energy to L
r.S
4parasitic capacitance voltage rise to V
c2after, S
3the anti-and diode current flow of parasitism, its drain-source voltage is 0, now opens switching tube S
3, realize no-voltage open-minded.
Stages 3 (t
2-t
3) S
2, S
3conducting, C
rcontinue to release energy, C
relectric current becomes negative, S
3forward conduction.
Stages 4 (t
3-t
4) S
1, S
2dead band, S
1parasitic capacitance discharge, S
2parasitic capacitance charging.S
2have no progeny in pass, resonant inductance L
rto S
1, S
2contact is filled with electric current, due to S
2parasitic capacitance exist, therefore the S that flows through
2electric current be zero, voltage rising is to V
c1, realize soft shutoff.
Stages 5 (t
4-t
5) S
1, S
3conducting, C
rgive C
1release energy, L
felectric current is larger, C
1, C
2between isolated island absorb electric charge.S
2parasitic capacitance voltage rise to V
c1after, S
1the anti-and diode current flow of parasitism, its drain-source voltage is 0, now opens switching tube S
1, realize no-voltage open-minded.
Stages 6 (t
5-t
6) S
1, S
3conducting, C
rcontinue to C
1release energy, L
felectric current reduces, C
1, C
2between isolated island emit electric charge.
Stages 7 (t
6-t
7) S
3, S
4dead band, S
4parasitic capacitance discharge, S
3parasitic capacitance charging.S
3have no progeny in pass, resonant inductance L
rfrom S
3, S
4contact absorbing current, due to S
3parasitic capacitance exist, therefore the S that flows through
3electric current be zero, voltage rising is to V
c2, realize soft shutoff.
Stages 8 (t
7-t
8) S
1, S
4conducting, high-pressure side will be to C
rcharging.S
3parasitic capacitance voltage rise to V
c2after, S
4the anti-and diode current flow of parasitism, its drain-source voltage is 0, now opens switching tube S
4, realize no-voltage open-minded.
Stages 9 (t
8-t
9) S
1, S
4conducting, high-pressure side is to C
rcharging, C
relectric current just becomes, S
4forward conduction.
Stages 10 (t
9-t
10) S
1, S
2dead band, S
2parasitic capacitance discharge, S
1parasitic capacitance charging.S
1have no progeny in pass, resonant inductance L
rfrom S
1, S
2contact absorbing current, due to S
1parasitic capacitance exist, therefore the S that flows through
1electric current be zero, voltage rising is to V
c2, realize soft shutoff.
Stages 11 (t
10-t
11) S
2, S
4conducting, C
rabsorb C
2energy.S
1parasitic capacitance voltage rise to V
c1after, S
2the anti-and diode current flow of parasitism, its drain-source voltage is 0, now opens switching tube S
2, realize no-voltage open-minded.
In order to improve pressure drop ratio, according to the unsteady flow topological structure in above-mentioned example, expand the progression of switched-capacitor circuit; As shown in Figure 7, a kind of non-isolation type current transformer based on phase shifting control, comprises n switched-capacitor circuit and a transforming circuit, and n switched-capacitor circuit successively cascade forms, n=5 in present embodiment;
Switched-capacitor circuit is by two switching tube S
1～S
2, a high-voltage capacitance C
1, a resonant capacitance C
rwith a resonant inductance L
rcomposition; Wherein, switching tube S
1input and high-voltage capacitance C
1one end be connected and be the first input end of switched-capacitor circuit, switching tube S
1output and switching tube S
2input and resonance inductance L
rone end be connected and be the second input of switched-capacitor circuit, switching tube S
2output and high-voltage capacitance C
1the other end be connected and be the first output of switched-capacitor circuit, resonant inductance L
rthe other end and resonant capacitance C
rone end be connected, resonant capacitance C
rthe other end second output that is switched-capacitor circuit;
The first output of i-1 switched-capacitor circuit is connected with the first input end of i switched-capacitor circuit, and the second output of i-1 switched-capacitor circuit is connected with the second input of i switched-capacitor circuit, and i is natural number and 2≤i≤5;
Transforming circuit is by two switching tube S
3～S
4, an output capacitance C
outa high-voltage capacitance C
2with a filter inductance L
fcomposition; Wherein, switching tube S
3input and high-voltage capacitance C
2one end be connected with the first output of the 5th switched-capacitor circuit, switching tube S
3output and switching tube S
4input, filter inductance L
fone end be connected with the second output of the 5th switched-capacitor circuit, switching tube S
4output and high-voltage capacitance C
2the other end be connected; Filter inductance L
fthe other end and high-voltage capacitance C
2the other end between be connected with output capacitance C
out.
The first input end of the 1st switched-capacitor circuit and high-voltage capacitance C
2the other end form high-pressure side external high voltage power supply or high-voltage load, filter inductance L
fthe other end and high-voltage capacitance C
2the other end form low-pressure side external low-tension supply or low-voltage load;
The control end of switching tube receives the control signal that external equipment provides; Switching tube S
1the control signal and the switching tube S that receive
2the control signal phase place that receives is complementary and have an interval, dead band; Switching tube S
3the control signal and the switching tube S that receive
4the control signal phase place that receives is complementary and have an interval, dead band; Switching tube S
1the control signal and the switching tube S that receive
3the control signal duty ratio that receives is identical and have a phase shifting angle.
Present embodiment is because the needs nature that powers on is all pressed, therefore C
1=C
2, switching tube employing N-type metal-oxide-semiconductor and each switching tube parameter are basic identical.
Be similar to the operation principle of foregoing employing one-level switched-capacitor circuit in conjunction with the unsteady flow topological structure of transforming circuit: in the time that phase shifting angle is 0, resonant inductance L
relectric current is zero, transmitting energy not between each high-voltage capacitance, and system is transmitting energy not;
(S in i-1 switched-capacitor circuit in the time that phase shifting angle is greater than 0
1have precedence over S in i switched-capacitor circuit
1conducting, S in the 5th switched-capacitor circuit
1have precedence over S
3conducting), C in i-1 switched-capacitor circuit
1to C in i switched-capacitor circuit
1transmitting energy, C in the 5th switched-capacitor circuit
1to C
2transmitting energy, system is from high side to low side transmitting energy; By capacitor C
2, switching tube S
3and S
4, filter inductance L
fwith output capacitance C
outform a BUCK circuit, adjust phase shifting angle, can make each high-voltage capacitance all press and for high-pressure side input voltage 1/6, low-pressure side output voltage is C
2upper voltage and S
1the product of the duty ratio D of control signal, now low-pressure side load is from C
2with level V resonant capacitance C
ron absorb energy, and C
2with level V resonant capacitance C
rfrom level V high-voltage capacitance C
1with fourth stage resonant capacitance C
ron absorb energy, by that analogy, system no-load voltage ratio is D/6;
(S in i-1 switched-capacitor circuit in the time that phase shifting angle is less than 0
1lag behind S in i switched-capacitor circuit
1conducting, S in the 5th switched-capacitor circuit
1lag behind S
3conducting), C in i switched-capacitor circuit
1to C in i-1 switched-capacitor circuit
1transmitting energy, C
2to C in the 5th switched-capacitor circuit
1transmitting energy, system is from low-pressure side to high-pressure side transmitting energy; By capacitor C
2, switching tube S
3and S
4with filter inductance L
fform a BOOST circuit and (remove output capacitance C
out), C
2upper voltage be low-pressure side input voltage divided by duty ratio D, adjust phase shifting angle, can make each high-voltage capacitance all press, and on high-tension side output voltage is capacitor C
26 times of voltage, now high-pressure side load is from first order high-voltage capacitance C
1on absorb energy, low-pressure side power supply is to C
2with level V resonant capacitance C
renergy storage, level V high-voltage capacitance C
1with fourth stage resonant capacitance C
rdraw C
2with level V resonant capacitance C
ron energy, by that analogy, system no-load voltage ratio is 6/D.
Claims (6)
1. the non-isolation type unsteady flow topological structure based on phase shifting control, is characterized in that: comprise a switched-capacitor circuit and a transforming circuit;
Described switched-capacitor circuit is by two switching tube S
1～S
2, a high-voltage capacitance C
1, a resonant capacitance C
rwith a resonant inductance L
rcomposition; Wherein, switching tube S
1input and high-voltage capacitance C
1one end be connected, switching tube S
1output and switching tube S
2input and resonance inductance L
rone end be connected, switching tube S
2output and high-voltage capacitance C
1the other end be connected, resonant inductance L
rthe other end and resonant capacitance C
rone end be connected, resonant capacitance C
rthe other end be connected with transforming circuit;
Described transforming circuit is by two switching tube S
3～S
4, a high-voltage capacitance C
2with a filter inductance L
fcomposition; Wherein, switching tube S
3input and high-voltage capacitance C
2one end and switched-capacitor circuit mesohigh capacitor C
1the other end be connected, switching tube S
3output and switching tube S
4input, filter inductance L
fone end and switched-capacitor circuit in resonant capacitance C
rthe other end be connected, switching tube S
4output and high-voltage capacitance C
2the other end be connected;
Described switching tube S
1～S
4control end all receive the control signal that external equipment provides; Wherein, described switching tube S
1the control signal and the switching tube S that receive
2the control signal phase place that receives is complementary and have an interval, dead band; Switching tube S
3the control signal and the switching tube S that receive
4the control signal phase place that receives is complementary and have an interval, dead band; Described switching tube S
1the control signal and the switching tube S that receive
3the control signal duty ratio that receives is identical and have a phase shifting angle.
2. the non-isolation type unsteady flow topological structure based on phase shifting control according to claim 1, is characterized in that: when high-pressure side as input low-pressure side as when output, described filter inductance L
fthe other end and high-voltage capacitance C
2the other end between be connected with output capacitance C
out.
3. the non-isolation type unsteady flow topological structure based on phase shifting control according to claim 1, is characterized in that: described switching tube S
1～S
4be metal-oxide-semiconductor.
4. the non-isolation type current transformer based on phase shifting control, is characterized in that: comprise n switched-capacitor circuit and a transforming circuit, n switched-capacitor circuit successively cascade forms, and n is greater than 1 natural number;
Described switched-capacitor circuit is by two switching tube S
1～S
2, a high-voltage capacitance C
1, a resonant capacitance C
rwith a resonant inductance L
rcomposition; Wherein, switching tube S
1input and high-voltage capacitance C
1one end be connected and be the first input end of switched-capacitor circuit, switching tube S
1output and switching tube S
2input and resonance inductance L
rone end be connected and be the second input of switched-capacitor circuit, switching tube S
2output and high-voltage capacitance C
1the other end be connected and be the first output of switched-capacitor circuit, resonant inductance L
rthe other end and resonant capacitance C
rone end be connected, resonant capacitance C
rthe other end second output that is switched-capacitor circuit;
The first output of i-1 switched-capacitor circuit is connected with the first input end of i switched-capacitor circuit, and the second output of i-1 switched-capacitor circuit is connected with the second input of i switched-capacitor circuit, and i is natural number and 2≤i≤n;
Described transforming circuit is by two switching tube S
3～S
4, a high-voltage capacitance C
2with a filter inductance L
fcomposition; Wherein, switching tube S
3input and high-voltage capacitance C
2one end and the first output of n switched-capacitor circuit be connected, switching tube S
3output and switching tube S
4input, filter inductance L
fone end and the second output of n switched-capacitor circuit be connected, switching tube S
4output and high-voltage capacitance C
2the other end be connected;
Described switching tube S
1～S
4control end all receive the control signal that external equipment provides; Wherein, described switching tube S
1the control signal and the switching tube S that receive
2the control signal phase place that receives is complementary and have an interval, dead band; Switching tube S
3the control signal and the switching tube S that receive
4the control signal phase place that receives is complementary and have an interval, dead band; Described switching tube S
1the control signal and the switching tube S that receive
3the control signal duty ratio that receives is identical and have a phase shifting angle.
5. the non-isolation type current transformer based on phase shifting control according to claim 4, is characterized in that: when high-pressure side as input low-pressure side as when output, described filter inductance L
fthe other end and high-voltage capacitance C
2the other end between be connected with output capacitance C
out.
6. the non-isolation type current transformer based on phase shifting control according to claim 4, is characterized in that: described switching tube S
1～S
4be metal-oxide-semiconductor.
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| CN201210235964.5A CN102769377B (en) | 2012-07-10 | 2012-07-10 | Non-isolated variable flow topological structure based on phase shift control and application thereof |
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| CN102769377B true CN102769377B (en) | 2014-07-16 |
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Cited By (2)
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| EP3506481A1 (en) * | 2017-12-26 | 2019-07-03 | Silergy Semiconductor Technology (Hangzhou) Ltd | Direct current-direct current converter |
| US11784560B2 (en) | 2021-07-13 | 2023-10-10 | Delta Electronics, Inc. | Power conversion circuit |
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| CN107634655B (en) * | 2017-08-07 | 2019-12-31 | 北京交通大学 | Direct current power electronic transformer topology with fault self-cutting capability |
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| Publication number | Publication date |
|---|---|
| CN102769377A (en) | 2012-11-07 |
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