CN104009645A - Series-parallel connection mixed type double-output LLC resonant converter - Google Patents
Series-parallel connection mixed type double-output LLC resonant converter Download PDFInfo
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- CN104009645A CN104009645A CN201410269620.5A CN201410269620A CN104009645A CN 104009645 A CN104009645 A CN 104009645A CN 201410269620 A CN201410269620 A CN 201410269620A CN 104009645 A CN104009645 A CN 104009645A
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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 invention discloses a series-parallel connection mixed type double-output LLC resonant converter and belongs to the technical field of power electronic converters. The series-parallel connection mixed type double-output LLC resonant converter comprises an input source, a primary side input filter capacitor, a primary side LLC resonance circuit, a transformer, an auxiliary side rectifying circuit, a first output filter capacitor, a second output filter capacitor, a first output load and a second output load. An input-output series-parallel connection mixed type structure is used, switching tube voltage and current stress can be effectively lowered, part of power can be directly output without being processed by the converter, and accordingly the efficiency of the converter can be effectively improved. The numbers of transformer output windings and power devices do not need to be increased, and two-voltage output is achieved. A key solution is provided for high-efficiency, high-power-density, low-cost multiple-path output direct-current power converting.
Description
Technical field
The present invention relates to a kind of dual output LLC controlled resonant converter, belong to converters technical field, especially belong to multi-channel output DC-DC transformation of electrical energy technical field.
Background technology
In the application of the technical fields such as Aeronautics and Astronautics, automobile, medical treatment, computer, communication system, in order to meet the demand of different loads supply power voltage, often need to adopt dual output power supply.How to reduce converter power device used quantity, reduce costs, improve transducer effciency and power density is the Important Problems that this technical field is paid close attention to always.
In the time that input voltage does not require isolation far above output voltage and input and output, adopting Buck converter is the most direct solution, but the switching device of Buck converter need to bear input voltage and output current, stress is higher, switching tube hard switching, switching loss are larger, and input and output voltage differ greatly also can cause the effective duty cycle of Buck converter to reduce, dynamic property variation.In addition, adopt single Buck converter to be difficult to realize multichannel output.
Utilize soft switch isolation converter also can realize non-isolated power conversion, for example adopt LLC controlled resonant converter, the soft switch that can realize all switching tubes, has the advantages such as high efficiency, high power density, high reliability, low cost, and can be relatively easy to realize multichannel output.Traditional dual output LLC converter increases output way by increasing transformer coupled winding, and as shown in Figure 1, the way of output is more, and the quantity of required Transformer Winding quantity and rectifier switch device is also more.This can make converter power device used relatively many, and cost is relatively high.Moreover, because all power all needs, through the processing of LLC converter, to be unfavorable for the further raising of efficiency.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, for dual output power conversion occasion provides a kind of series and parallel combined dual output LLC controlled resonant converter.
The object of the invention is to be achieved through the following technical solutions:
The series and parallel combined dual output LLC controlled resonant converter of described one is by input source (U
in), former limit input filter capacitor (C
1), former limit LLC resonant circuit (10), transformer (T), secondary side rectification circuit (20), the first output filter capacitor (C
o1), the second output filter capacitor (C
o2), the first output loading (R
o1) and the second output loading (R
o2) form, its limit, Central Plains LLC resonant circuit (10) is by former limit the first switching tube (S
p1), former limit second switch pipe (S
p2), former limit the 3rd switching tube (S
p3), former limit the 4th switching tube (S
p4), the first resonant inductance (L
r), the second resonant inductance (L
m) and resonant capacitance (Cr) composition, transformer (T) comprises a former limit winding (N
p) and two secondary winding (N
s1, N
s2), secondary side rectification circuit (20) is by secondary the first switching tube (S
s1), secondary second switch pipe (S
s2), secondary the 3rd switching tube (S
s3) and secondary the 4th switching tube (S
s4) composition; The former limit first switching tube (S of described former limit LLC resonant circuit (10)
p1) drain electrode be connected in former limit the 3rd switching tube (S
p3) drain electrode, former limit input filter capacitor (C
1) one end and input source (U
in) anode, former limit the first switching tube (S
p1) source electrode be connected in former limit second switch pipe (S
p2) drain electrode and the first resonant inductance (L
r) one end, the first resonant inductance (L
r) the other end be connected in one end of resonant capacitance (Cr), the other end of resonant capacitance (Cr) is connected in the second resonant inductance (L
m) one end and transformer (T) former limit winding (N
p) one end, the second resonant inductance (L
m) the other end be connected in transformer (T) former limit winding (N
p) the other end, former limit the 3rd switching tube (S
p3) source electrode and former limit the 4th switching tube (S
p4) drain electrode, former limit the 4th switching tube (S
p4) source electrode be connected in former limit second switch pipe (S
p2) source electrode, former limit input filter capacitor (C
1) the other end, the first output filter capacitor (C
o1) one end, the first output loading (R
o1) one end, secondary the first switching tube (S
s1) drain electrode and secondary second switch pipe (S
s2) drain electrode; Described secondary the first switching tube (S
s1) source electrode be connected in secondary second switch pipe (S
s2) drain electrode and transformer (T) the first secondary winding (N
s1) Same Name of Ends, transformer (T) the first secondary winding (N
s1) non-same polarity be connected in transformer (T) the second secondary winding (N
s2) Same Name of Ends, the second output filter capacitor (C
o2) one end and the second output loading (R
o2) one end, transformer (T) the second secondary winding (N
s2) non-same polarity be connected in secondary the 3rd switching tube (S
s3) source electrode and secondary the 4th switching tube (S
s4) drain electrode, secondary the 4th switching tube (S
s4) source electrode be connected in secondary second switch pipe (S
s2) source electrode, the first output filter capacitor (C
o1) the other end, the second output filter capacitor (C
o2) the other end, the first output loading (R
o1) the other end, the second output loading (R
o2) the other end and input source (U
in) negative terminal.
The series and parallel combined dual output LLC controlled resonant converter of described one is by input source (U
in), former limit input filter capacitor (C
1), former limit LLC resonant circuit (10), transformer (T), secondary side rectification circuit (20), the first output filter capacitor (C
o1), the second output filter capacitor (C
o2), the first output loading (R
o1) and the second output loading (R
o2) form, its limit, Central Plains LLC resonant circuit (10) is by former limit the first switching tube (S
p1), former limit second switch pipe (S
p2), former limit the 3rd switching tube (S
p3), former limit the 4th switching tube (S
p4), the first resonant inductance (L
r), the second resonant inductance (L
m) and resonant capacitance (Cr) composition, transformer (T) comprises a former limit winding (N
p) and two secondary winding (N
s1, N
s2), secondary side rectification circuit (20) is by secondary the first diode (D
s1), secondary the second diode (D
s2), secondary the 3rd diode (D
s3) and secondary the 4th diode (D
s4) composition; The former limit first switching tube (S of described former limit LLC resonant circuit (10)
p1) drain electrode be connected in former limit the 3rd switching tube (S
p3) drain electrode, former limit input filter capacitor (C
1) one end and input source (U
in) anode, former limit the first switching tube (S
p1) source electrode be connected in former limit second switch pipe (S
p2) drain electrode and the first resonant inductance (L
r) one end, the first resonant inductance (L
r) the other end be connected in one end of resonant capacitance (Cr), the other end of resonant capacitance (Cr) is connected in the second resonant inductance (L
m) one end and transformer (T) former limit winding (N
p) one end, the second resonant inductance (L
m) the other end be connected in transformer (T) former limit winding (N
p) the other end, former limit the 3rd switching tube (S
p3) source electrode and former limit the 4th switching tube (S
p4) drain electrode, former limit the 4th switching tube (S
p4) source electrode be connected in former limit second switch pipe (S
p2) source electrode, former limit input filter capacitor (C
1) the other end, the first output filter capacitor (C
o1) one end, the first output loading (R
o1) one end, secondary the first diode (D
s1) drain electrode and secondary the second diode (D
s2) drain electrode; Described secondary the first diode (D
s1) source electrode be connected in secondary the second diode (D
s2) drain electrode and transformer (T) the first secondary winding (N
s1) Same Name of Ends, transformer (T) the first secondary winding (N
s1) non-same polarity be connected in transformer (T) the second secondary winding (N
s2) Same Name of Ends, the second output filter capacitor (C
o2) one end and the second output loading (R
o2) one end, transformer (T) the second secondary winding (N
s2) non-same polarity be connected in secondary the 3rd diode (D
s3) source electrode and secondary the 4th diode (D
s4) drain electrode, secondary the 4th diode (D
s4) source electrode be connected in secondary the second diode (D
s2) source electrode, the first output filter capacitor (C
o1) the other end, the second output filter capacitor (C
o2) the other end, the first output loading (R
o1) the other end, the second output loading (R
o2) the other end and input source (U
in) negative terminal.
The essential distinction of technical solution of the present invention and existing technical scheme is, in the case of the transformer output winding and power device that do not increase LLC converter, constructs the second tunnel output by pull out secondary centre cap from transformer secondary bridge rectifier structure.The present invention adopts the accurate parallel way of input and output further to improve the efficiency of converter.The present invention can obviously reduce switch tube voltage stress in the LLC resonant circuit of former limit, reduces power device quantity, improve transducer effciency and power density.
The present invention has following beneficial effect:
(1) converter secondary adopts the mode of centre cap bridge rectifier, can realize doubleway output;
(2) reduce converter secondary power device quantity, reduce costs;
(3) converter secondary power semiconductor can be realized voltage clamp naturally, and device voltage stress is low;
(4) have that efficiency is high, power density advantages of higher;
(5) the accurate mode in parallel of input and output has reduced the voltage stress of switching tube in the LLC resonant circuit of former limit;
(6) the accurate mode in parallel of input and output allows input source directly provide Partial Power to output, further improves power-efficient;
Brief description of the drawings
Accompanying drawing 1 is traditional dual output LLC converter principle figure;
Accompanying drawing 2 is that the former limit of the present invention LLC resonant circuit adopts full-bridge LLC circuit topology, secondary side rectification circuit to adopt the series and parallel combined dual output LLC controlled resonant converter of the one schematic diagram of bridge synchronization rectification;
Accompanying drawing 3 is that the former limit of the present invention LLC resonant circuit adopts full-bridge LLC circuit topology, secondary side rectification circuit to adopt the series and parallel combined dual output LLC controlled resonant converter of the one schematic diagram of bridge diode rectification;
Accompanying drawing 4 is that the former limit of the present invention LLC resonant circuit adopts half-bridge LLC circuit topology, secondary side rectification circuit to adopt the series and parallel combined dual output LLC controlled resonant converter of the one schematic diagram of bridge synchronization rectification;
Accompanying drawing 5 is that the former limit of the present invention LLC resonant circuit adopts half-bridge LLC circuit topology, secondary side rectification circuit to adopt the series and parallel combined dual output LLC controlled resonant converter of the one schematic diagram of bridge diode rectification;
Accompanying drawing 6 is that former limit LLC resonant circuit adopts full-bridge LLC circuit topology, secondary side rectification circuit to adopt the groundwork waveform of a kind of series and parallel combined dual output LLC controlled resonant converter of bridge synchronization rectification;
Accompanying drawing 7～10th, former limit LLC resonant circuit adopts full-bridge LLC circuit topology, secondary side rectification circuit to adopt a kind of series and parallel combined dual output LLC controlled resonant converter of bridge synchronization rectification at the equivalent circuit diagram of each switch mode;
Designation in above accompanying drawing: 10 is former limit LLC resonant circuit; 20 is secondary side rectification circuit; T is transformer; N
p, N
s1and N
s2be respectively former limit winding, the first secondary winding and the second secondary winding of transformer (T); S
p1, S
p2, S
p3and S
p4be respectively former limit first, second, third and the 4th switching tube; S
s1, S
s2, S
s3and S
s4be respectively secondary first, second, third and the 4th switching tube; L
rit is the first resonant inductance; L
mit is the second resonant inductance; C
rfor resonant capacitance; C
1for input filter capacitor; C
o1and C
o2be respectively the first and second output filter capacitors; C
busfor bus capacitor; C
in1and C
in2for filter capacitor; R
o1and R
o2be respectively the first and second output loadings; U
infor input source; U
o1and U
o2be respectively the first and second output voltages; U
busfor busbar voltage; D
s1, D
s2, D
s3, D
s4, D
s5, D
s6, D
s7and D
s8for rectifier diode; L
o1, L
o2for filter inductance; S
s5, S
s6, S
s7and S
s8for switching tube; i
infor input source U
insupply current; i
lrfor flowing through the first resonant inductance (L
r) electric current, i
lmfor flowing through the second resonant inductance (L
m) electric current, u
crfor resonant capacitance (C
r) voltage at two ends; i
sP1, i
sP2, i
sP3and i
sP4be respectively and flow into switching tube S
p1, S
p2, S
p3and S
p4drain current; i
sS1, i
sS2, i
sS3and i
sS4be respectively and flow into switching tube S
s1, S
s2, S
s3and S
s4drain current; u
gSP1, u
gSP2, u
gSP3and u
gSP4be respectively switching tube S
p1, S
p2, S
p3and S
p4driving voltage; u
gSS1, u
gSS2, u
gSS3and u
gSS4be respectively switching tube S
s1, S
s2, S
s3and S
s4driving voltage; t
0, t
1, t
2, t
3and t
4for the time.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is elaborated.
As shown in Figure 2, the series and parallel combined dual output LLC controlled resonant converter of described one is by input source (U
in), former limit input filter capacitor (C
1), former limit LLC resonant circuit (10), transformer (T), secondary side rectification circuit (20), the first output filter capacitor (C
o1), the second output filter capacitor (C
o2), the first output loading (R
o1) and the second output loading (R
o2) form, its limit, Central Plains LLC resonant circuit (10) is by former limit the first switching tube (S
p1), former limit second switch pipe (S
p2), former limit the 3rd switching tube (S
p3), former limit the 4th switching tube (S
p4), the first resonant inductance (L
r), the second resonant inductance (L
m) and resonant capacitance (Cr) composition, transformer (T) comprises a former limit winding (N
p) and two secondary winding (N
s1, N
s2), secondary side rectification circuit (20) is by secondary the first switching tube (S
s1), secondary second switch pipe (S
s2), secondary the 3rd switching tube (S
s3) and secondary the 4th switching tube (S
s4) composition; The former limit first switching tube (S of described former limit LLC resonant circuit (10)
p1) drain electrode be connected in former limit the 3rd switching tube (S
p3) drain electrode, former limit input filter capacitor (C
1) one end and input source (U
in) anode, former limit the first switching tube (S
p1) source electrode be connected in former limit second switch pipe (S
p2) drain electrode and the first resonant inductance (L
r) one end, the first resonant inductance (L
r) the other end be connected in one end of resonant capacitance (Cr), the other end of resonant capacitance (Cr) is connected in the second resonant inductance (L
m) one end and transformer (T) former limit winding (N
p) one end, the second resonant inductance (L
m) the other end be connected in transformer (T) former limit winding (N
p) the other end, former limit the 3rd switching tube (S
p3) source electrode and former limit the 4th switching tube (S
p4) drain electrode, former limit the 4th switching tube (S
p4) source electrode be connected in former limit second switch pipe (S
p2) source electrode, former limit input filter capacitor (C
1) the other end, the first output filter capacitor (C
o1) one end, the first load (R
o1) one end, secondary the first switching tube (S
s1) drain electrode and secondary second switch pipe (S
s2) drain electrode; Described secondary the first switching tube (S
s1) source electrode be connected in secondary second switch pipe (S
s2) drain electrode and transformer (T) the first secondary winding (N
s1) Same Name of Ends, transformer (T) the first secondary winding (N
s1) non-same polarity be connected in transformer (T) the second secondary winding (N
s2) Same Name of Ends, the second output filter capacitor (C
o2) one end and the second output loading (R
o2) one end, transformer (T) the second secondary winding (N
s2) non-same polarity be connected in secondary the 3rd switching tube (S
s3) source electrode and secondary the 4th switching tube (S
s4) drain electrode, secondary the 4th switching tube (S
s4) source electrode be connected in secondary second switch pipe (S
s2) source electrode, the first output filter capacitor (C
o1) the other end, the second output filter capacitor (C
o2) the other end, the first output loading (R
o1) the other end, the second output loading (R
o2) the other end and input source (U
in) negative terminal.
As shown in Figure 4, the series and parallel combined dual output LLC controlled resonant converter of described one is by input source (U
in), former limit input filter capacitor (C
1), former limit LLC resonant circuit (10), transformer (T), secondary side rectification circuit (20), the first output filter capacitor (C
o1), the second output filter capacitor (C
o2), the first output loading (R
o1) and the second output loading (R
o2) form, its limit, Central Plains LLC resonant circuit (10) is by former limit the first switching tube (S
p1), former limit second switch pipe (S
p2), former limit the 3rd switching tube (S
p3), former limit the 4th switching tube (S
p4), the first resonant inductance (L
r), the second resonant inductance (L
m) and resonant capacitance (Cr) composition, transformer (T) comprises a former limit winding (N
p) and two secondary winding (N
s1, N
s2), secondary side rectification circuit (20) is by secondary the first diode (D
s1), secondary the second diode (D
s2), secondary the 3rd diode (D
s3) and secondary the 4th diode (D
s4) composition; The former limit first switching tube (S of described former limit LLC resonant circuit (10)
p1) drain electrode be connected in former limit the 3rd switching tube (S
p3) drain electrode, former limit input filter capacitor (C
1) one end and input source (U
in) anode, former limit the first switching tube (S
p1) source electrode be connected in former limit second switch pipe (S
p2) drain electrode and the first resonant inductance (L
r) one end, the first resonant inductance (L
r) the other end be connected in one end of resonant capacitance (Cr), the other end of resonant capacitance (Cr) is connected in the second resonant inductance (L
m) one end and transformer (T) former limit winding (N
p) one end, the second resonant inductance (L
m) the other end be connected in transformer (T) former limit winding (N
p) the other end, former limit the 3rd switching tube (S
p3) source electrode and former limit the 4th switching tube (S
p4) drain electrode, former limit the 4th switching tube (S
p4) source electrode be connected in former limit second switch pipe (S
p2) source electrode, former limit input filter capacitor (C
1) the other end, the first output filter capacitor (C
o1) one end, the first output loading (R
o1) one end, secondary the first diode (D
s1) drain electrode and secondary the second diode (D
s2) drain electrode; Described secondary the first diode (D
s1) source electrode be connected in secondary the second diode (D
s2) drain electrode and transformer (T) the first secondary winding (N
s1) Same Name of Ends, transformer (T) the first secondary winding (N
s1) non-same polarity be connected in transformer (T) the second secondary winding (N
s2) Same Name of Ends, the second output filter capacitor (C
o2) one end and the second output loading (R
o2) one end, transformer (T) the second secondary winding (N
s2) non-same polarity be connected in secondary the 3rd diode (D
s3) source electrode and secondary the 4th diode (D
s4) drain electrode, secondary the 4th diode (D
s4) source electrode be connected in secondary the second diode (D
s2) source electrode, the first output filter capacitor (C
o1) the other end, the second output filter capacitor (C
o2) the other end, the first output loading (R
o1) the other end, the second output loading (R
o2) the other end and input source (U
in) negative terminal.
In the present invention, the effect of described former limit LLC resonant circuit (10) is to produce Symmetrical resonance current, and is injected into the former limit winding (N of transformer (T)
p) in.In order to achieve this end, described former limit LLC resonant circuit (10) can be the circuit topology such as full-bridge LLC, half-bridge LLC.The effect of described secondary side rectification circuit (20) is to two secondary winding (N of transformer (T)
s1, N
s2) in Symmetrical pulse current carry out rectification, form dual output.In order to achieve this end, described secondary side rectification circuit (20) can adopt the rectification circuits such as bridge diode rectification, bridge synchronization rectification.Accompanying drawing 2 has provided former limit LLC resonant circuit and has adopted full-bridge LLC circuit topology, secondary side rectification circuit to adopt the series and parallel combined dual output LLC controlled resonant converter of the one schematic diagram of bridge synchronization rectification.Accompanying drawing 3 has provided former limit LLC resonant circuit and has adopted full-bridge LLC circuit topology, secondary side rectification circuit to adopt the series and parallel combined dual output LLC controlled resonant converter of the one schematic diagram of bridge diode rectification.Accompanying drawing 4 has provided former limit LLC resonant circuit and has adopted half-bridge LLC circuit topology, secondary side rectification circuit to adopt the series and parallel combined dual output LLC controlled resonant converter of the one schematic diagram of bridge synchronization rectification.Accompanying drawing 5 has provided former limit LLC resonant circuit and has adopted half-bridge LLC circuit topology, secondary side rectification circuit to adopt the series and parallel combined dual output LLC controlled resonant converter of the one schematic diagram of bridge diode rectification.
The object of the invention is to realize high efficiency, high power density, dual output conversion cheaply, in order to realize this object, the present invention pulls out secondary centre cap and constructs the second tunnel output in the transformer secondary bridge rectifier structure of LLC converter.The present invention adopts the accurate parallel way of input and output further to improve the efficiency of converter.The present invention can obviously reduce switch tube voltage stress in the LLC resonant circuit of former limit, reduces power device quantity, improve transducer effciency and power density.
Adopt full-bridge LLC circuit topology, secondary side rectification circuit to adopt the series and parallel combined dual output LLC controlled resonant converter of one of bridge synchronization rectification as example taking the former limit LLC resonant circuit shown in accompanying drawing 2 below, operation principle of the present invention is described.Accompanying drawing 6 has provided former limit LLC resonant circuit and has adopted full-bridge LLC circuit topology, secondary side rectification circuit to adopt the groundwork waveform of a kind of series and parallel combined dual output LLC controlled resonant converter of bridge synchronization rectification.
T
0before moment, former limit the first switching tube S
p1with former limit the 4th switching tube S
p4conducting, former limit full-bridge circuit applies positive voltage by the first resonant inductance (L
r), the second resonant inductance (L
m), resonant capacitance (C
r) the resonant network two ends that are composed in series, secondary the first switching tube (S
s1) and secondary the 4th switching tube (S
s4) conducting, output voltage reflexes to transformer (T) former limit winding (N
p) the voltage clamp second resonant inductance (L at two ends
m), make the linear rising of its electric current, the first resonant inductance (L
r) and resonant capacitance (C
r) resonance, the first resonant inductance (L
r) and the second resonant inductance (L
m) in electric current be negative value, both difference between currents have been delivered to two winding (N of its secondary by transformer (T)
s1, N
s2) in, flow through respectively secondary the first switching tube (S
s1) and secondary the 4th switching tube (S
s4), former limit the first switching tube S
p1, former limit the 4th switching tube S
p4, secondary the first switching tube (S
s1) and secondary the 4th switching tube (S
s4) electric current be all negative value, resonant capacitance (C
r) voltage is negative value, resonant network is to input source (U
in) return to energy, provide power to two-way output loading, input source (U
in) pass through current i
indirectly to the first output loading (R
o1) Partial Power is provided; t
0moment, the first resonant inductance (L
r) current over-zero, resonant capacitance (C
r) voltage reaches reversed peak, the first resonant inductance (L
r) and resonant capacitance (C
r) continuation resonance, the second resonant inductance (L
m) continue to be output and reflex to transformer (T) former limit winding (N
p) voltage clamp at two ends, electric current is linear to rise, input source (U
in) providing power to resonant network and two-way output loading, this mode equivalent electric circuit is as shown in Figure 7.
T
1moment, former limit the first switching tube S
p1with former limit the 4th switching tube S
p4conducting, On current is on the occasion of, the first resonant inductance (L
r) electric current and the second resonant inductance (L
m) electric current equate, the first resonant inductance (L
r), the second resonant inductance (L
m) and resonant capacitance (C
r) three's resonance together, two winding (N of transformer (T) secondary
s1, N
s2) in electric current be zero, secondary the first switching tube (S
s1) and secondary the 4th switching tube (S
s4) zero-current switching, transformer (T) is thrown off with output, input source (U
in) provide energy to resonant network, the second output filter capacitor (C
o2) independent giving to the second output loading (R
o2) power supply, input source (U
in) and the first output filter capacitor (C
o1) together to the first output loading (R
o1) power supply, this mode equivalent electric circuit is as shown in Figure 8.
T
2moment, former limit the first switching tube S
p1with former limit the 4th switching tube S
p4turn-off, output voltage reflexes to transformer (T) former limit winding (N
p) the voltage clamp second resonant inductance (L at two ends
m), make the linear decline of its electric current, the first resonant inductance (L
r) and resonant capacitance (C
r) resonance, former limit the first switching tube S
p1with former limit second switch pipe S
p2the change of current, former limit the 4th switching tube S
p4with former limit the 3rd switching tube S
p3the change of current, secondary second switch pipe S
p2body diode and secondary the 3rd switching tube S
p3body diode zero current turning-on, former limit second switch pipe S
p2, former limit the 3rd switching tube S
p3, secondary second switch pipe S
s2with secondary the 3rd switching tube S
s3on current is all negative value, and resonant network is to input source (U
in) return to energy, provide power to two-way output loading, input source (U
in) pass through current i
indirectly to the first output loading (R
o1) Partial Power is provided, this mode equivalent electric circuit is as shown in Figure 9.
T
3moment, former limit second switch pipe S
p2with former limit the 3rd switching tube S
p3no-voltage is open-minded, and On current is negative value, and former limit full-bridge circuit applies negative voltage by the first resonant inductance (L
r), the second resonant inductance (L
m), resonant capacitance (C
r) the resonant network two ends that are composed in series, secondary second switch pipe (S
s2) and the 3rd switching tube (S
s3) no-voltage is open-minded, output voltage reflexes to transformer (T) former limit winding (N
p) the voltage clamp second resonant inductance (L at two ends
m), make the linear decline of its electric current, the first resonant inductance (L
r) and resonant capacitance (C
r) resonance, the first resonant inductance (L
r) and the second resonant inductance (L
m) in electric current be on the occasion of, both difference between currents have been delivered to two winding (N of its secondary by transformer (T)
s1, N
s2) in, flow through respectively secondary second switch pipe (S
s2) and secondary the 3rd switching tube (S
s3), former limit second switch pipe S
p2, former limit the 3rd switching tube S
p3, secondary second switch pipe (S
s2) and secondary the 3rd switching tube (S
s3) in electric current be all negative value, resonant capacitance (C
r) voltage be on the occasion of, resonant network is to input source (U
in) return to energy, provide power to two-way output loading, input source (U
in) pass through current i
indirectly to the first output loading (R
o1) Partial Power is provided, this mode equivalent electric circuit is as shown in Figure 10.
T
4in the moment, lower half switch periods starts, and the course of work is similar, no longer repeated description.
Known according to the description of the above-mentioned course of work, input source (U of the present invention
in) can directly provide Partial Power to load, can realize doubleway output, realize the soft switch of all switching tubes.The present invention can effectively reduce power device quantity, improve power conversion efficiency and power density.
Claims (2)
1. a series and parallel combined dual output LLC controlled resonant converter, is characterized in that:
The series and parallel combined dual output LLC controlled resonant converter of described one is by input source (U
in), former limit input filter capacitor (C
1), former limit LLC resonant circuit (10), transformer (T), secondary side rectification circuit (20), the first output filter capacitor (C
o1), the second output filter capacitor (C
o2), the first output loading (R
o1) and the second output loading (R
o2) form, its limit, Central Plains LLC resonant circuit (10) is by former limit the first switching tube (S
p1), former limit second switch pipe (S
p2), former limit the 3rd switching tube (S
p3), former limit the 4th switching tube (S
p4), the first resonant inductance (L
r), the second resonant inductance (L
m) and resonant capacitance (Cr) composition, transformer (T) comprises a former limit winding (N
p) and two secondary winding (N
s1, N
s2), secondary side rectification circuit (20) is by secondary the first switching tube (S
s1), secondary second switch pipe (S
s2), secondary the 3rd switching tube (S
s3) and secondary the 4th switching tube (S
s4) composition; The former limit first switching tube (S of described former limit LLC resonant circuit (10)
p1) drain electrode be connected in former limit the 3rd switching tube (S
p3) drain electrode, former limit input filter capacitor (C
1) one end and input source (U
in) anode, former limit the first switching tube (S
p1) source electrode be connected in former limit second switch pipe (S
p2) drain electrode and the first resonant inductance (L
r) one end, the first resonant inductance (L
r) the other end be connected in one end of resonant capacitance (Cr), the other end of resonant capacitance (Cr) is connected in the second resonant inductance (L
m) one end and transformer (T) former limit winding (N
p) one end, the second resonant inductance (L
m) the other end be connected in transformer (T) former limit winding (N
p) the other end, former limit the 3rd switching tube (S
p3) source electrode and former limit the 4th switching tube (S
p4) drain electrode, former limit the 4th switching tube (S
p4) source electrode be connected in former limit second switch pipe (S
p2) source electrode, former limit input filter capacitor (C
1) the other end, the first output filter capacitor (C
o1) one end, the first output loading (R
o1) one end, secondary the first switching tube (S
s1) drain electrode and secondary second switch pipe (S
s2) drain electrode; Described secondary the first switching tube (S
s1) source electrode be connected in secondary second switch pipe (S
s2) drain electrode and transformer (T) the first secondary winding (N
s1) Same Name of Ends, transformer (T) the first secondary winding (N
s1) non-same polarity be connected in transformer (T) the second secondary winding (N
s2) Same Name of Ends, the second output filter capacitor (C
o2) one end and the second output loading (R
o2) one end, transformer (T) the second secondary winding (N
s2) non-same polarity be connected in secondary the 3rd switching tube (S
s3) source electrode and secondary the 4th switching tube (S
s4) drain electrode, secondary the 4th switching tube (S
s4) source electrode be connected in secondary second switch pipe (S
s2) source electrode, the first output filter capacitor (C
o1) the other end, the second output filter capacitor (C
o2) the other end, the first output loading (R
o1) the other end, the second output loading (R
o2) the other end and input source (U
in) negative terminal.
2. a series and parallel combined dual output LLC controlled resonant converter, is characterized in that:
The series and parallel combined dual output LLC controlled resonant converter of described one is by input source (U
in), former limit input filter capacitor (C
1), former limit LLC resonant circuit (10), transformer (T), secondary side rectification circuit (20), the first output filter capacitor (C
o1), the second output filter capacitor (C
o2), the first output loading (R
o1) and the second output loading (R
o2) form, its limit, Central Plains LLC resonant circuit (10) is by former limit the first switching tube (S
p1), former limit second switch pipe (S
p2), former limit the 3rd switching tube (S
p3), former limit the 4th switching tube (S
p4), the first resonant inductance (L
r), the second resonant inductance (L
m) and resonant capacitance (Cr) composition, transformer (T) comprises a former limit winding (N
p) and two secondary winding (N
s1, N
s2), secondary side rectification circuit (20) is by secondary the first diode (D
s1), secondary the second diode (D
s2), secondary the 3rd diode (D
s3) and secondary the 4th diode (D
s4) composition; The former limit first switching tube (S of described former limit LLC resonant circuit (10)
p1) drain electrode be connected in former limit the 3rd switching tube (S
p3) drain electrode, former limit input filter capacitor (C
1) one end and input source (U
in) anode, former limit the first switching tube (S
p1) source electrode be connected in former limit second switch pipe (S
p2) drain electrode and the first resonant inductance (L
r) one end, the first resonant inductance (L
r) the other end be connected in one end of resonant capacitance (Cr), the other end of resonant capacitance (Cr) is connected in the second resonant inductance (L
m) one end and transformer (T) former limit winding (N
p) one end, the second resonant inductance (L
m) the other end be connected in transformer (T) former limit winding (N
p) the other end, former limit the 3rd switching tube (S
p3) source electrode and former limit the 4th switching tube (S
p4) drain electrode, former limit the 4th switching tube (S
p4) source electrode be connected in former limit second switch pipe (S
p2) source electrode, former limit input filter capacitor (C
1) the other end, the first output filter capacitor (C
o1) one end, the first output loading (R
o1) one end, secondary the first diode (D
s1) drain electrode and secondary the second diode (D
s2) drain electrode; Described secondary the first diode (D
s1) source electrode be connected in secondary the second diode (D
s2) drain electrode and transformer (T) the first secondary winding (N
s1) Same Name of Ends, transformer (T) the first secondary winding (N
s1) non-same polarity be connected in transformer (T) the second secondary winding (N
s2) Same Name of Ends, the second output filter capacitor (C
o2) one end and the second output loading (R
o2) one end, transformer (T) the second secondary winding (N
s2) non-same polarity be connected in secondary the 3rd diode (D
s3) source electrode and secondary the 4th diode (D
s4) drain electrode, secondary the 4th diode (D
s4) source electrode be connected in secondary the second diode (D
s2) source electrode, the first output filter capacitor (C
o1) the other end, the second output filter capacitor (C
o2) the other end, the first output loading (R
o1) the other end, the second output loading (R
o2) the other end and input source (U
in) negative terminal.
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| CN201410269620.5A CN104009645B (en) | 2014-06-16 | 2014-06-16 | A kind of series and parallel combined dual output LLC resonant converter |
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| CN104638932A (en) * | 2015-03-06 | 2015-05-20 | 南京航空航天大学 | Multi-resonant converter |
| CN104935178A (en) * | 2014-12-12 | 2015-09-23 | 武汉绿鼎天舒科技发展有限公司 | Lighting device with adjustable height |
| CN106712541A (en) * | 2016-12-30 | 2017-05-24 | 深圳英飞源技术有限公司 | Power source converter |
| CN108616215A (en) * | 2016-12-13 | 2018-10-02 | 深圳职业技术学院 | a kind of resonance circuit |
| CN111404388A (en) * | 2020-04-13 | 2020-07-10 | 剑桥大学南京科技创新中心有限公司 | Series cascade type switch transformer direct current converter and working method thereof |
| CN113678358A (en) * | 2019-01-24 | 2021-11-19 | 麦格纳国际公司 | Method and system for driving synchronous rectifier of LLC DC-DC converter using noise filter |
| US11437915B2 (en) | 2020-06-24 | 2022-09-06 | Delta Electronics, Inc. | Converter |
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| US11437915B2 (en) | 2020-06-24 | 2022-09-06 | Delta Electronics, Inc. | Converter |
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|---|---|
| CN104009645B (en) | 2016-09-07 |
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