CN105375807A - Direct current (DC)/alternating current (AC) conversion device, direct current/ direct current conversion device and constant current driving device - Google Patents
Direct current (DC)/alternating current (AC) conversion device, direct current/ direct current conversion device and constant current driving device Download PDFInfo
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- CN105375807A CN105375807A CN201510868740.1A CN201510868740A CN105375807A CN 105375807 A CN105375807 A CN 105375807A CN 201510868740 A CN201510868740 A CN 201510868740A CN 105375807 A CN105375807 A CN 105375807A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
- H02M7/53873—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with digital control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5383—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Rectifiers (AREA)
Abstract
The present invention discloses a direct current (DC)/alternating current (AC) conversion device. The direct current (DC)/alternating current (AC) conversion device comprises a charge pump circuit, a half-bridge resonance device and a control device; the charge pump circuit is suitable for receiving direct current input voltage and alternating current feedback from the half-bridge resonance device, and a DC bus voltage is output after power factor correction; the half-bridge resonance device is suitable for receiving the DC bus voltage, an AC output voltage is output through conversion, the half-bridge resonance device includes a half-bridge inversion circuit and a resonance tank circuit, and the half-bridge inversion circuit consists of a switch and is suitable for receiving the DC bus voltage and a switching signal from the control device so as to output a pulse voltage to the resonance tank circuit; the resonance tank circuit is suitable for receiving the pulse voltage, an AC output voltage is output through resonance, and the resonance tank circuit is also suitable for output AC feedback to the charge pump circuit; and the control device is suitable for generating the switching signal and controlling the AC output voltage according to the switching signal, wherein the switching signal is configured to indicate on and off of the switch. The present invention further discloses a direct current/ direct current conversion device and a constant current driving device.
Description
Technical field
The present invention relates to technical field of integrated circuits, particularly relate to a kind of DC/AC conversion equipment, DC/DC conversion equipment and constant current driving device.
Background technology
Along with power electronic technology, the developing rapidly of LED light source, features such as LED light source is high owing to having luminous efficiency, and power consumption is little, long service life, and security reliability is strong and being widely used in various lighting demand.But meanwhile, the power factor (PF value) to LED illumination product such as national standard, European standard has certain requirement, especially, higher to the power factor command of LED illumination product in the engineering project that number of applications is more.
At present, the LED drive scheme realizing High Power Factor comprises prime and adds Active Power Factor Correction (APFC) circuit and single-stage Active Power Factor Correction constant current scheme etc., but such scheme is along with the raising of power factor, also occurred that cost significantly rises and the problem of driving arrangement decrease in efficiency, and its circuit structure is usually comparatively complicated, be unfavorable for implementing.
Therefore, in the urgent need to proposing a kind of drive scheme that can realize one pole power factor correction, can raise the efficiency again, reduce costs.
Summary of the invention
For this reason, the invention provides one, to try hard to solve or at least alleviate at least one problem existed above.
According to an aspect of the present invention, provide a kind of DC/AC conversion equipment, the control device comprising charge pump circuit, the half-bridge resonance device be connected with charge pump circuit and be connected with half-bridge resonance device, wherein charge pump circuit is suitable for receiving DC input voitage and the AC regeneration from half-bridge resonance device, after power factor correction, export DC bus-bar voltage; Half-bridge resonance device is suitable for receiving this DC bus-bar voltage, through conversion output AC output voltage, half-bridge resonance device comprises half-bridge inversion circuit and resonant groove path, half-bridge inversion circuit comprises switch, and be suitable for receiving DC bus-bar voltage and the switching signal carrying out self-control device, voltage pulse output is to resonant groove path; Resonant groove path is suitable for received pulse voltage, through resonance output AC output voltage, is also suitable for output AC and feeds back to charge pump circuit; Control device is suitable for generating switching signal, controls ac output voltage, the conducting of switching signal indicator cock or cut-off according to this switching signal.
Alternatively, in DC/AC conversion equipment according to the present invention, charge pump circuit is connected to DC input voitage inlet side and goes out between end, and comprises node N and node H, node N is suitable for receiving the AC regeneration from resonant groove path, and node H is suitable for exporting DC bus-bar voltage; Half-bridge inversion circuit is connected between node H and DC input voitage go out to hold, and comprises switch and node M, and this switch comprises the first switch and the second switch of serial connection, and this node M is positioned at the first switch and second switch serial connection mid point, is suitable for voltage pulse output; Resonant groove path is connected between node N and node M, and comprises isolating transformer T
main, isolating transformer primary side is suitable for feeding back to charge pump circuit through node N output AC, and primary side is suitable for output AC output voltage.
Alternatively, in DC/AC conversion equipment according to the present invention, switching signal comprises the first switching signal of control first switch conduction or cut-off and controls the second switch signal of second switch conducting or cut-off, and the first switching signal and second switch signal are the square-wave signal with duty ratio.
Alternatively, in DC/AC conversion equipment according to the present invention, the first switch is switching tube Q
1, second switch is switching tube Q
2, switching tube Q
2collector electrode is connected with node H, and emitter is through node M and switching tube Q
1collector electrode connects, switching tube Q
1emitter goes out to hold with DC input voitage and is connected, switching tube Q
1with switching tube Q
2base stage is all connected with control device, receives the first switching signal and second switch signal respectively.
Alternatively, in DC/AC conversion equipment according to the present invention, resonant groove path comprises electric capacity C
r, inductance L
rwith isolating transformer T
main, node N is through electric capacity C
r, inductance L
rbe connected with node M with isolating transformer primary side.
Alternatively, in DC/AC conversion equipment according to the present invention, charge pump circuit also comprises diode D
pull, diode D
push, electric capacity C
boostwith electric capacity C
ht, diode D
pullpositive pole is connected with DC input voitage inlet side, and negative pole is through node N and diode D
pushpositive pole connects, diode D
pushnegative pole is connected with node H, electric capacity C
boostbe connected between node N and DC input voitage go out to hold, electric capacity C
htbe connected between node H and DC input voitage go out to hold.
According to another aspect of the present invention, provide a kind of DC/DC conversion equipment, comprising: according to DC/AC conversion equipment of the present invention, and output rectifier, be suitable for receiving the ac output voltage from DC/AC conversion equipment, through rectification for load provides constant current to drive.
Alternatively, in DC/DC conversion equipment according to the present invention, output rectifier comprises diode D
out1, diode D
out2, electric capacity C
outwith node O, isolating transformer primary side two ends respectively with diode D
out1, diode D
out2positive pole connects, diode D
out1, diode D
out2negative pole is all connected with node O, node O also with electric capacity C
outpositive pole connects, and is suitable for output constant current driving, electric capacity C
outnegative pole is connected with isolating transformer primary side winding centre cap.
Also have an aspect according to of the present invention, provide a kind of constant current driving device, comprise input rectifying device, and according to DC/DC conversion equipment of the present invention, wherein input rectifying device is suitable for exporting DC/DC conversion equipment to by after line voltage rectification; DC/DC conversion equipment is suitable for the line voltage after receiving rectification, provides constant current to drive through being converted to load.
Alternatively, in constant current driving device according to the present invention, input rectifying device comprises rectifier bridge, and rectifier bridge comprises four rectifier diodes.
Alternatively, in constant current driving device according to the present invention, also comprise EMI circuit, EMI circuit is suitable for suppressing High-frequency Interference, is connected between civil power and described input rectifying device.
Alternatively, in constant current driving device according to the present invention, EMI circuit comprises electric capacity C
xwith common mode inductance L
cm.
Alternatively, in constant current driving device according to the present invention, also comprise filter circuit, filter circuit comprises electric capacity C
f1, electric capacity C
f2and inductance L
dm.
According to the solution of the present invention, by half-bridge resonance device and charge pump circuit, one pole achieves power factor correction, low harmony wave constant current output, and achieves the less Sofe Switch function of switching loss, and efficiency is higher, goes for driving high power load; Circuit topology is simple and easy to implement simultaneously, and component number is less, greatly reduces cost, reduces device volume, is convenient to miniaturization.In addition, also achieved the electrical isolation of load end and power end by isolating transformer wherein, fully ensure that use safety.
Accompanying drawing explanation
In order to realize above-mentioned and relevant object; combine description below and accompanying drawing herein to describe some illustrative aspect; these aspects indicate the various modes can putting into practice principle disclosed herein, and all aspects and equivalent aspect thereof are intended to fall in the scope of theme required for protection.Read detailed description below in conjunction with the drawings, above-mentioned and other object of the present disclosure, Characteristics and advantages will become more obvious.Throughout the disclosure, identical Reference numeral is often referred to for identical parts or element.
Fig. 1 shows the structured flowchart of the illuminator 100 according to an exemplary embodiment of the present invention;
Fig. 2 shows the structured flowchart of constant current driving device 200 according to one exemplary embodiment;
Fig. 3 shows the structured flowchart of DC/DC conversion equipment 300 according to one exemplary embodiment;
Fig. 4 shows the structured flowchart of DC/AC conversion equipment 400 according to one exemplary embodiment; And
Fig. 5 shows the circuit theory diagrams of constant current driving device 200 according to one exemplary embodiment.
Embodiment
Below with reference to accompanying drawings exemplary embodiment of the present disclosure is described in more detail.Although show exemplary embodiment of the present disclosure in accompanying drawing, however should be appreciated that can realize the disclosure in a variety of manners and not should limit by the embodiment set forth here.On the contrary, provide these embodiments to be in order to more thoroughly the disclosure can be understood, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
Fig. 1 shows the structured flowchart of illuminator 100 according to one exemplary embodiment.This illuminator 100 can comprise mains supply 110, constant current driving device 200 and load 130, and mains supply 110 can provide the different ac commercial power voltage without rectification according to various execution mode, such as 220V industrial frequency AC civil power.Load 130 can be LED-based lighting unit, such as, comprise the string of LED light source connected in series.Mains supply 110 can by constant current driving device 200 for load 130 provides constant current to drive.
Fig. 2 shows constant current driving device 200 according to one exemplary embodiment, and this constant current driving device 200 can comprise EMI circuit 210, input rectifying device 220, filter circuit 230 and DC/DC conversion equipment 300.EMI circuit 210 is connected with mains supply 110, be suitable for suppressing High-frequency Interference, such as can suppress the impact of AC network medium-high frequency interference on this constant current driving device 200, also can suppression equipment to the interference of AC network, EMI circuit 210 is generally the low-pass filter circuit be made up of series inductance and shunt capacitance.Input rectifying device 220 is connected with EMI circuit 210, is suitable for receiving the filtered line voltage of EMI, exports more level and smooth direct voltage after rectification.Input rectifying device 220 is generally the rectifier bridge be made up of several rectifier diodes.Filter circuit 230 is connected with input rectifying device 220, is generally made up of electric capacity and/or inductance, is suitable for the ripple in filtering commutating voltage, level and smooth output waveform.
DC/DC conversion equipment 300 is connected with filter circuit 230, receives the level and smooth DC input voitage that line voltage exports after rectification, filtering, i.e. the direct voltage of above-mentioned filter circuit 230 output, provides constant current to drive through being converted to load 130.DC/DC conversion equipment 300, the DC/DC conversion equipment 300 that Fig. 3 shows according to one exemplary embodiment can comprise DC/AC conversion equipment 400 and output rectifier 310.DC/AC conversion equipment 400 is suitable for receiving above-mentioned DC input voitage, is converted to ac output voltage and exports.Output rectifier 310 is connected with DC/AC conversion equipment 400, is suitable for receiving the ac output voltage from DC/AC conversion equipment 400, through rectification for load 130 provides constant current to drive.This output rectifier 310 carries out rectification by rectifier diode and electric capacity to alternating voltage usually, such as, can be the full-wave rectification bridge with Capacitive output filter or centre cap structure.
Fig. 4 shows the structured flowchart of DC/AC conversion equipment 400 according to one exemplary embodiment, the control device 430 that DC/AC conversion equipment 400 can comprise charge pump circuit 410, half-bridge resonance device 420 and be connected with half-bridge resonance device 420.
Charge pump circuit 410 is suitable for receiving above-mentioned DC input voitage, and receives the AC regeneration from half-bridge resonance device 420, after power factor correction, export DC bus-bar voltage.This charge pump circuit 410 is made up of at least one diode and electric capacity usually, can realize High Power Factor and regulate, meet small-sized, economic demand.
Half-bridge resonance device 420 is connected with charge pump circuit 410, is suitable for receiving this DC bus-bar voltage, through conversion output AC output voltage.This half-bridge resonance device 420 can be the resonant circuits such as such as LLC half-bridge resonance circuit, and have the advantages that topology is simple, operating efficiency is high, can realize the Sofe Switch function of zero voltage switching or zero current switching, switching loss is little, and cost is lower.
As shown in Figure 4, half-bridge resonance device 420 can comprise half-bridge inversion circuit 421 and resonant groove path 422, wherein half-bridge inversion circuit 421 comprises switch, and be suitable for receiving DC bus-bar voltage and the switching signal carrying out self-control device 430, voltage pulse output is to resonant groove path 422, its breaker in middle can be field-effect transistor (FET), such as metal oxide semiconductor field effect tube (MOSFET), also can be bipolar transistor, such as insulated gate bipolar transistors (IGBT) etc., the present invention is not restricted this.
Resonant groove path 422 is suitable for receiving this pulse voltage, and through resonance output AC output voltage, meanwhile, resonant groove path 422 is also suitable for output AC and feeds back to charge pump circuit 410.
Control device 430 is connected with half-bridge resonance device 420, is suitable for generating switching signal, and controls the ac output voltage of half-bridge resonance device 420 output according to switching signal, and wherein switching signal indicates conducting or the cut-off of half-bridge inversion circuit 421 breaker in middle.
According to an embodiment of the invention, charge pump circuit 410 is connected to DC input voitage inlet side and goes out between end, can comprise node N and node H, and node N is suitable for receiving the AC regeneration from resonant groove path 422, and node H is suitable for exporting DC bus-bar voltage.
Half-bridge inversion circuit 421 is connected between node H and DC input voitage go out to hold, and comprise switch and node M, this switch comprises the first switch and the second switch of serial connection, wherein the first switch and second switch all have control pole, the grid of such as MOSFET or the base stage of IGBT, first switch is extremely all connected with control device 430 with the control of second switch, be suitable for the switching signal that receiving control device 430 generates, this switching signal can comprise the first switching signal of control first switch conduction or cut-off and control the second switch signal of second switch conducting or cut-off, first switching signal and second switch signal are the square-wave signal with duty ratio, node M is positioned at this first switch and second switch serial connection mid point, and be suitable for voltage pulse output to resonant groove path 422, this pulse voltage waveform is generally square wave.
Resonant groove path 422 is connected between node N and node M, and comprises isolating transformer T
main, this isolating transformer T
mainprimary side is suitable for feeding back to charge pump circuit 410 through node N output AC, and primary side is suitable for the ac output voltage exporting high frequency.
Then, this isolating transformer T
mainthe ac output voltage that primary side exports, after output rectifier 310 rectification, can provide the constant current of low harmony wave, High Power Factor to drive for load 130.
The operation principle of constant current driving device 200 is described with concrete circuit embodiments below.
Fig. 5 shows the circuit theory diagrams of constant current driving device 200 according to one exemplary embodiment.As shown in Figure 5, EMI circuit 210 comprises electric capacity C
xwith common mode inductance L
cm, electric capacity C
xtwo ends are connected with live wire L, zero line N respectively, also with common mode inductance L
cmconnect.Input rectifying device 220 is for comprising rectifier diode D
b1, D
b2, D
b3and D
b4rectifier bridge, rectifier diode D
b1negative pole and rectifier diode D
b2negative pole connects, rectifier diode D
b2positive pole and rectifier diode D
b4negative pole, common mode inductance Lcm connect, rectifier diode D
b4positive pole and rectifier diode D
b3positive pole connects, rectifier diode D
b3negative pole and rectifier diode D
b1positive pole, common mode inductance Lcm connect.Filter circuit 230 comprises electric capacity C
f1, electric capacity C
f2and inductance L
dm, be towering type LC filter circuit, electric capacity C
f1with electric capacity C
f2be connected in parallel on rectifier diode D successively
b4positive pole and rectifier diode D
b2between negative pole, inductance L
dmbe connected on electric capacity C
f1with electric capacity C
f2between, one end and rectifier diode D
b2negative pole connects, the other end and electric capacity C
f2connect.Understandably, the 220V power frequency ac voltage that live wire exports is after EMI circuit 210, input rectifying device 220 and filter circuit 230, and in DC/DC conversion equipment 300, DC/AC conversion equipment 400 provides DC input voitage.Here, electric capacity C
f2with inductance L
dmone end is DC input voitage inlet side, with rectifier diode D
b4it is that DC input voitage goes out end that positive pole connects one end.
In DC/AC conversion equipment 400, charge pump circuit 410 comprises diode D
pull, diode D
push, electric capacity C
boostwith electric capacity C
ht, diode D
pullpositive pole is connected with above-mentioned DC input voitage inlet side, and negative pole is through node N and diode D
pushpositive pole connects, this diode D
pushnegative pole is connected with node H, electric capacity C
boostbe connected between node N and DC input voitage go out to hold, electric capacity C
htbe connected between node H and DC input voitage go out to hold.
In half-bridge resonance device 420, in half-bridge inversion circuit 421, the first switch is switching tube Q
1, second switch is switching tube Q
2, switching tube Q
2collector electrode is connected with node H, and emitter is through node M and switching tube Q
1collector electrode connects, switching tube Q
1emitter goes out to hold with DC input voitage and is connected, switching tube Q
1with switching tube Q
2base stage is all connected with control device 430, receives the first switching signal and second switch signal respectively, and the first switching signal and second switch signal are square-wave signal, and the two duty ratio is identical, phase 180 °.
Resonant groove path 422 comprises electric capacity C
r, inductance L
rwith isolating transformer T
main, node N is through electric capacity C
r, inductance L
rwith isolating transformer T
mainprimary side is connected with node M.Output rectifier 310 comprises diode D
out1, diode D
out2, electric capacity C
outwith node O, isolating transformer T in resonant groove path 422
mainprimary side two ends respectively with diode D
out1, diode D
out2positive pole connects, diode D
out1, diode D
out2negative pole is all connected with node O, node O also with electric capacity C
outpositive pole connects, this electric capacity C
outnegative pole and isolating transformer T
mainprimary side winding centre cap connects.Wherein, node O and electric capacity C
outbe connected with load (not shown) between negative pole, the constant current of low harmony wave, High Power Factor can be provided to drive for load.
Particularly, electric capacity C in charge pump circuit 410
htdC bus-bar voltage is exported to half-bridge resonance device 420, half-bridge inversion circuit 421 breaker in middle pipe Q through node H
1with switching tube Q
2the first switching signal received according to it and conducting or the cut-off successively of second switch signal, square wave pulse voltage is exported to resonant groove path 422 through node M, therefore high-frequency ac voltage and high-frequency ac current is produced in resonant groove path 422, and export above-mentioned ac output voltage to output rectifier 310, so that for load provides constant current to drive after output rectifier 310 rectification, wherein, switching tube Q1 and switching tube Q2 is according to its switching signal received and the alternating current flowed through on it, Zero Current Switch can be realized, reduce switching loss, improve conversion efficiency.
In addition, resonant groove path 422 also exports high-frequency ac current as AC regeneration to charge pump circuit 410 through node N, and charge pump circuit 410 utilizes this AC regeneration to achieve power factor emendation function, improves power factor, and circuit structure is simple, and cost is lower.Particularly, due to switching tube Q
1with switching tube Q
2switching frequency is higher, and the frequency of this high-frequency ac current is much larger than the frequency of node H place voltage, and switch periods interior nodes H place's voltage fluctuation is less, can be considered DC constant voltage source, and electric capacity C
htcapacity is comparatively large, and node H place voltage is larger.
When high-frequency alternating current flow path direction is isolating transformer T dorsad
maindirection (namely from node M to node N direction), diode D
pushconducting, node N place voltage equals node H place voltage, and this high-frequency alternating current flows through diode D
pushto electric capacity C
htcharging, until when this high-frequency ac current is decreased to 0 gradually, diode D
pushcut-off; Then high-frequency alternating current flow path direction becomes isolating transformer T
maindirection (namely from node N to node M direction), electric capacity C
boostelectric discharge, node N place voltage reduces, until be low to moderate diode D
pullduring the DC input voitage that positive pole receives, diode D
pullconducting, node N place voltage equals this DC input voitage, and this DC input voitage provides energy for high-frequency ac current, until when high-frequency ac current is decreased to 0 gradually, diode D
pullcut-off; Then high-frequency alternating current flow path direction becomes isolating transformer T dorsad again
maindirection, because now node N place voltage still equals this DC input voitage, is less than node M place voltage, diode D
pushstill remain off, high-frequency alternating current flows to electric capacity C simultaneously
boostcharging, node N place voltage raises, until when height is to node M place voltage, diode D
pushconducting again.Charge pump circuit 410 is according to above-mentioned diode D
pushwith diode D
pullconducting successively and cut-off and electric capacity C
boostdischarge and recharge, effectively can improve power factor, simultaneously through the DC bus-bar voltage of node H stable output to half-bridge resonance device 420.
In sum, by the DC/AC conversion equipment 400 based on LLC half-bridge resonance circuit and charge pump circuit, DC/DC conversion equipment 300 achieves power factor correction, low harmony wave constant current output with constant current driving device 200 one pole comprising this device 300, and efficiency is higher, go for driving high power load; Circuit topology is simple and easy to implement simultaneously, and component number is less, greatly reduces cost, reduces device volume, is convenient to miniaturization.In addition, also achieved the electrical isolation of load end and power end by isolating transformer wherein, fully ensure that use safety.
Be to be understood that, in order to simplify the disclosure and to help to understand in each inventive aspect one or more, in the description above to exemplary embodiment of the present invention, each feature of the present invention is grouped together in single embodiment, figure or the description to it sometimes.But, the method for the disclosure should be construed to the following intention of reflection: namely the present invention for required protection requires than the feature more multiple features clearly recorded in each claim.Or rather, as claims below reflect, all features of disclosed single embodiment before inventive aspect is to be less than.Therefore, the claims following embodiment are incorporated to this embodiment thus clearly, and wherein each claim itself is as independent embodiment of the present invention.
Those skilled in the art are to be understood that the module of the equipment in example disclosed herein or unit or assembly can be arranged in equipment as depicted in this embodiment, or alternatively can be positioned in one or more equipment different from the equipment in this example.Module in aforementioned exemplary can be combined as a module or can be divided into multiple submodule in addition.
Those skilled in the art are appreciated that and adaptively can change the module in the equipment in embodiment and they are arranged in one or more equipment different from this embodiment.Module in embodiment or unit or assembly can be combined into a module or unit or assembly, and multiple submodule or subelement or sub-component can be put them in addition.Except at least some in such feature and/or process or unit be mutually repel except, any combination can be adopted to combine all processes of all features disclosed in this specification (comprising adjoint claim, summary and accompanying drawing) and so disclosed any method or equipment or unit.Unless expressly stated otherwise, each feature disclosed in this specification (comprising adjoint claim, summary and accompanying drawing) can by providing identical, alternative features that is equivalent or similar object replaces.
In addition, those skilled in the art can understand, although embodiments more described herein to comprise in other embodiment some included feature instead of further feature, the combination of the feature of different embodiment means and to be within scope of the present invention and to form different embodiments.Such as, in the following claims, the one of any of embodiment required for protection can use with arbitrary compound mode.
In addition, some in described embodiment are described as at this can by the processor of computer system or the method implemented by other device performing described function or the combination of method element.Therefore, there is the device of processor formation for implementing the method or method element of the necessary instruction for implementing described method or method element.In addition, the element described herein of device embodiment is the example as lower device: this device is for implementing the function performed by the element of the object in order to implement this invention.
As used in this, unless specifically stated so, use ordinal number " first ", " second ", " the 3rd " etc. to describe plain objects and only represent the different instances relating to similar object, and be not intended to imply the object be described like this must have the time upper, spatially, sequence aspect or in any other manner to definite sequence.
Although the embodiment according to limited quantity describes the present invention, benefit from description above, those skilled in the art understand, in the scope of the present invention described thus, it is contemplated that other embodiment.In addition, it should be noted that the language used in this specification is mainly in order to object that is readable and instruction is selected, instead of select to explain or limiting theme of the present invention.Therefore, when not departing from the scope and spirit of appended claims, many modifications and changes are all apparent for those skilled in the art.For scope of the present invention, be illustrative to disclosing of doing of the present invention, and nonrestrictive, and scope of the present invention is defined by the appended claims.
Claims (13)
1. a DC/AC conversion equipment, the control device comprising charge pump circuit, the half-bridge resonance device be connected with described charge pump circuit and be connected with described half-bridge resonance device, wherein
Described charge pump circuit is suitable for receiving DC input voitage and the AC regeneration from described half-bridge resonance device, after power factor correction, export DC bus-bar voltage;
Described half-bridge resonance device is suitable for receiving described DC bus-bar voltage, through conversion output AC output voltage, described half-bridge resonance device comprises half-bridge inversion circuit and resonant groove path, described half-bridge inversion circuit comprises switch, and the switching signal being suitable for receiving described DC bus-bar voltage and carrying out self-control device, voltage pulse output is to described resonant groove path; Described resonant groove path is suitable for receiving described pulse voltage, exports described ac output voltage through resonance, is also suitable for exporting described AC regeneration to described charge pump circuit;
Described control device is suitable for generating described switching signal, controls described ac output voltage according to described switching signal, and described switching signal indicates conducting or the cut-off of described switch.
2. DC/AC conversion equipment according to claim 1, described charge pump circuit is connected to described DC input voitage inlet side and goes out between end, and comprise node N and node H, described node N is suitable for receiving the AC regeneration from described resonant groove path, and described node H is suitable for exporting described DC bus-bar voltage; Described half-bridge inversion circuit is connected between described node H and described DC input voitage go out to hold, and comprise described switch and node M, described switch comprises the first switch and the second switch of serial connection, described node M is positioned at described first switch and second switch serial connection mid point, is suitable for exporting described pulse voltage; Described resonant groove path is connected between described node N and node M, and comprises isolating transformer T
main, described isolating transformer primary side is suitable for exporting described AC regeneration to charge pump circuit through described node N, and primary side is suitable for exporting described ac output voltage.
3. DC/AC conversion equipment according to claim 2, described switching signal comprises the first switching signal of control first switch conduction or cut-off and controls the second switch signal of second switch conducting or cut-off, and described first switching signal and second switch signal are the square-wave signal with duty ratio.
4. DC/AC conversion equipment according to claim 3, described first switch is switching tube Q
1, described second switch is switching tube Q
2, described switching tube Q
2collector electrode is connected with described node H, and emitter is through described node M and described switching tube Q
1collector electrode connects, described switching tube Q
1emitter goes out to hold with described DC input voitage and is connected, described switching tube Q
1with switching tube Q
2base stage is all connected with described control device, receives described first switching signal and second switch signal respectively.
5. DC/AC conversion equipment according to claim 4, described resonant groove path comprises electric capacity C
r, inductance L
rwith described isolating transformer T
main, described node N is through described electric capacity C
r, inductance L
rbe connected with described node M with described isolating transformer primary side.
6. DC/AC conversion equipment according to claim 5, described charge pump circuit also comprises diode D
pull, diode D
push, electric capacity C
boostwith electric capacity C
ht, described diode D
pullpositive pole is connected with described DC input voitage inlet side, and negative pole is through described node N and described diode D
pushpositive pole connects, described diode D
pushnegative pole is connected with described node H, described electric capacity C
boostbe connected between described node N and described DC input voitage go out to hold, described electric capacity C
htbe connected between described node H and described DC input voitage go out to hold.
7. a DC/DC conversion equipment, comprising:
DC/AC conversion equipment according to any one of claim 2-6, and
Output rectifier, is suitable for receiving the ac output voltage from described DC/AC conversion equipment, through rectification for load provides constant current to drive.
8. DC/DC conversion equipment according to claim 7, described output rectifier comprises diode D
out1, diode D
out2, electric capacity C
outwith node O, described isolating transformer primary side two ends respectively with diode D
out1, diode D
out2positive pole connects, described diode D
out1, diode D
out2negative pole is all connected with described node O, described node O also with described electric capacity C
outpositive pole connects, and is suitable for output constant current driving, described electric capacity C
outnegative pole is connected with described isolating transformer primary side winding centre cap.
9. a constant current driving device, comprises input rectifying device, and the DC/DC conversion equipment according to claim 7 or 8, wherein
Described input rectifying device is suitable for export described DC/DC conversion equipment after line voltage rectification to; Described DC/DC conversion equipment is suitable for the line voltage after receiving rectification, provides constant current to drive through being converted to load.
10. constant current driving device according to claim 9, described input rectifying device comprises rectifier bridge, and described rectifier bridge comprises four rectifier diodes.
11. constant current driving devices according to claim 9, also comprise EMI circuit, and described EMI circuit is suitable for suppressing High-frequency Interference, is connected between civil power and described input rectifying device.
12. constant current driving devices according to claim 11, described EMI circuit comprises electric capacity C
xwith common mode inductance L
cm.
13. constant current driving devices according to claim 9, also comprise filter circuit, and described filter circuit comprises electric capacity C
f1, electric capacity C
f2and inductance L
dm.
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|---|---|---|---|
| CN201510868740.1A CN105375807A (en) | 2015-12-01 | 2015-12-01 | Direct current (DC)/alternating current (AC) conversion device, direct current/ direct current conversion device and constant current driving device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510868740.1A CN105375807A (en) | 2015-12-01 | 2015-12-01 | Direct current (DC)/alternating current (AC) conversion device, direct current/ direct current conversion device and constant current driving device |
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| CN201510868740.1A Pending CN105375807A (en) | 2015-12-01 | 2015-12-01 | Direct current (DC)/alternating current (AC) conversion device, direct current/ direct current conversion device and constant current driving device |
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Application publication date: 20160302 |