CN109586567A - A kind of topological structure of wide input voltage range multichannel High voltage output - Google Patents
A kind of topological structure of wide input voltage range multichannel High voltage output Download PDFInfo
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- CN109586567A CN109586567A CN201811326614.3A CN201811326614A CN109586567A CN 109586567 A CN109586567 A CN 109586567A CN 201811326614 A CN201811326614 A CN 201811326614A CN 109586567 A CN109586567 A CN 109586567A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—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 more than one ouput with independent control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—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 in push-pull configuration
- H02M3/3376—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 in push-pull configuration with automatic control of output voltage or current
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
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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 present invention provides a kind of topological structures of wide input voltage range multichannel High voltage output, it mainly recommends comprising prime BUCK or BOOST BUCK-BOOST topology and rear class or full-bridge or half-bridge topology two parts, the prime BUCK or BOOST BUCK-BOOST topology use closed-loop control, make BUCK output voltage stabilization in a fixed value, and rear class is recommended or full-bridge or half-bridge topology are using open loop expire duty ratio control, so that guaranteeing that each road exports all has low laod stability and low cross regulation rate.The beneficial effects of the present invention are: realizing wide scope input, multichannel High voltage output outputs and inputs isolation, and low laod stability (approximately less than 0.5%) and low cross regulation rate (approximately less than 2%) may be implemented using two kinds of topology cascades.Soft switch technique may be implemented simultaneously, improve whole power-efficient.
Description
Technical field
The present invention relates to opening up for high voltage power supply topological structure more particularly to a kind of wide input voltage range multichannel High voltage output
Flutter structure.
Background technique
With the development of power electronics technology, especially in military project or aerospace field, the market of high voltage power supply and
Demand is constantly increasing, and performance indicator requires and reliability requirement is also continuously improved, and needs multichannel high pressure defeated mostly
Out, or even up to 7 road High voltage outputs, such as certain high voltage power supply of space industry, output voltage range is between 700V~10KV, only
High voltage output number is 6 tunnels.It is existing both at home and abroad at present in face of the output voltage requirement of such numerous voltage class and power grade
Power source design majority both for per the individually designed converter of conditions of demand all the way, this scheme brings the very big disadvantage to be
Structure is complicated for integrated circuit, and device used is more, causes the volume and weight of equipment excessive, brings to whole structure design very big
Challenge.And numerous individual transform devices also will cause the interference of beat frequency from each other, cause to the stability of power supply system
It influences.And it is directed to the high voltage power supply of wide input voltage range multichannel High voltage output, its property is difficult to realize using current technology
The requirement (≤1%) of energy index request, especially laod stability.Multiple separately adjustable converters are integrated by the present invention
In one topological structure, the volume weight of whole equipment can be greatly reduced in this way and improves transfer efficiency.Simultaneously as
The High voltage output voltage that be a main Topology g eneration all, there is no what multiple converter working frequencies interfered with each other to ask in this way
Topic greatly reduces the EMI interference to power supply system, and the requirement of its performance indicator and reliability requirement may be implemented completely.
Propose that a kind of using BOOST circuit or BUCK-BOOST circuit input voltage to be transformed to stable direct current defeated in document [1]
Voltage out, Lai Shixian wide range input, but this mode is relatively single.It is proposed in document [2] a kind of based on two-stage topology
Control program, preceding step voltage preconditioning unit controls voltage by the duty ratio of control upper tube S1 and preconditions cell node N1 electricity
Mean value is flattened, the boosting part that rear class output voltage adjusts in unit passes through the duty of control boosting part (BOOST) down tube S4
Than controlling intermediate bus bar capacitor C2 voltage, to realize wide-range input voltage.This scheme uses BOOST circuit, but increases
Voltage preconditions cell node N1, that is, increases the average value that two switching tubes carry out control node N1, and control is complicated, increases volume
With increase cost.Auto-adjusting circuit is increased in input terminal in document [3], is increased by the chain pressure regulation of resistance and metal-oxide-semiconductor
Input voltage range, but the method stability is poor, and impracticable.Auxiliary source is inputted by design high pressure and low pressure in document [4]
Realize the input of wide scope, wherein high input voltage accessory power supply 1 output voltage outline is higher than the defeated of low pressure input accessory power supply 2
Voltage out, at the same to make high input voltage accessory power supply 1 work when, low pressure input accessory power supply 2 should be at close or halted state,
High input voltage accessory power supply 1 passes through diode common cathode with the output of low pressure input accessory power supply 2 respectively and is connected.Such mode is
High pressure and low pressure auxiliary source are separately designed for input voltage range to realize that wide scope inputs, but need to design two in this way
Auxiliary source, overall volume increasing are twice, and are unfavorable for miniaturization, are increased design cost.Document [5] and [6] are simply using tradition
Flyback scheme realize that wide scope inputs, but flyback converter is difficult to take into account in high input voltage duty ratio very little at light load
Duty ratio control when high input voltage and low pressure input, and circuit of reversed excitation will take into account the bound of input voltage will make magnetic element
Design it is extremely difficult.Document [7] realizes height using traditional PWM pulse width modulator, high-tension transformer, sampling feedback circuit
Press direct current output.But the program uses secondary feedback, if the insulation pressure-resistant treatments of primary and secondary are improper, secondary side high pressure is easy to
Primary side is sealed in, causes primary circuit high-voltage breakdown to damage, there are security risks.Document [8] [9] [10] is all made of flyback converter
Topology, input stablize input voltage using voltage stabilizing chip 7809, by determining frequency oscillator circuit, transformer and secondary booster circuit phase
In conjunction with mode realize the High voltage output of secondary 1500V, and mainly apply to electric mosquito flap mosquito eradication.This 3 inventions may be implemented
High voltage output, but output electric current is but very small, is suitable only for such as mosquito eradication occasion, is not particularly suited for multichannel High voltage output
With the occasion of mA grades of load currents.Document [11] is realized using push-pull converter topology, secondary using six voltage-doubling boost circuits
High voltage output.But can only realize that low current exports by the way of six voltage-doubling boost circuits, and not be able to satisfy different voltages etc.
The multichannel High voltage output demand of grade.Document [12] stablizes DC input voitage using DC voltage booster circuit BOOST solid at one
Fixed value come realize wide scope input, using flyback converter Multiple coil realize multichannel High voltage output.But the program is using secondary
Grade opto-coupled feedback, if the insulation pressure-resistant treatments of primary and secondary are improper, secondary side high pressure is easy to seal in primary side, leads to primary circuit height
Punch through damage is pressed, there are security risks, and poor using its each road output loading stability of flyback topologies and cross regulation rate, right
Laod stability and the demanding occasion of cross regulation rate are simultaneously not suitable for.Document [13] is realized by a pressure stabilizing translation circuit
Wide-range input voltage, pressure stabilizing translation circuit are stabilized the output voltage as the defeated of secondary isolation high-voltage power translation circuit
Enter, secondary isolation high-voltage power translation circuit is realized using push-pull topology, and the mode for exporting rectification is all made of the side of two multiplication of voltages
Then formula realizes High voltage output by cascade mode.But to realize multichannel High voltage output, transformer winding quantity is inevitable
More, transformer parasitic parameter is big, i.e., parasitic capacitance is big and transformer leakage inductance is big, leads to the reduction of rear class topology efficiency, can not achieve
Efficient output.For document [14] by prime BUCK closed loop, rear class recommends the mode of open loop to realize that wide scope inputs high pressure
Output, and high load regulation is realized using the width circuit combination closed-loop control that disappears.Output is realized using four voltage multiplying rectifier modes
High voltage output, but such mode can only realize that low current exports, and not be able to satisfy the multichannel High voltage output of different voltages grade
Demand.
[1] switching power source control circuit of a kind of wide scope of CN 201720210843.3 input
[2] a kind of novel wide scope input power translation circuit of CN 201710837799.3
[3] a kind of wide scope input switch power circuit of CN 201720999140.3
[4] a kind of wide scope of CN 201611156348.5 inputs airborne DCDC auxiliary power circuit
[5] Switching Power Supply of 201520968660.9 super wide range of CN input
[6] a kind of input of wide scope of CN 201610551674.X, Multiple isolated outputs flyback power supply
[7] a kind of high-voltage DC power supply of CN 201711481425.9
[8] a kind of high-voltage power circuit with voltage stabilizing function of CN 201711314344.X
[9] a kind of high-voltage power circuit with current detection function of CN 201711314111.X
[10] a kind of high-voltage power circuit of CN 201711314122.8
[11] 201310290872.1 low current high precision variable High voltage output device of CN
[12] a kind of input of the wide scope of CN 201110278155.8, Multiple isolated outputs high-voltage power circuit
[13] a kind of highly reliable magnetic deflection mass spectrometer multiple-channel output high-voltage power circuit of CN 201410307055.7
[14] low current of 201510068468.9 wide input voltage range high load regulation of CN exports high-voltage power circuit.
Summary of the invention
In order to solve the problems in the prior art, the present invention provides a kind of wide input voltage range multichannel High voltage outputs
Topological structure.
The present invention provides a kind of topological structures of wide input voltage range multichannel High voltage output, mainly include prime BUCK
Either BOOST BUCK-BOOST topology and rear class are recommended or full-bridge or half-bridge topology two parts, the prime BUCK
Either BOOST BUCK-BOOST topology uses closed-loop control, makes BUCK output voltage stabilization in a fixed value, then
Grade, which is recommended, or full-bridge or half-bridge topology are using open loop expire duty ratio control, so that guaranteeing that each road exports all has low load
Stability and low cross regulation rate.
As a further improvement of the present invention, the topological structure further includes surge restraint circuit, EMI circuit, intermediate mother
Line voltage, the input termination wide scope input of the surge restraint circuit, the output end of the surge restraint circuit and the EMI
The input terminal of circuit connects, the output end of the EMI circuit and the prime BUCK or BOOST or BUCK-BOOST topology
Input terminal connection, the output end of the prime BUCK or BOOST or BUCK-BOOST topology and the intermediate bus bar are electric
The input terminal of pressure connects, the output end of the intermediate-bus voltage recommended with the rear class or full-bridge or half-bridge topology it is defeated
Enter end connection, the rear class is recommended or the output of full-bridge or half-bridge topology termination rear class multiple-channel output.
As a further improvement of the present invention, the prime BUCK or BOOST BUCK-BOOST topology and described
Rear class is recommended or full-bridge is perhaps connected with synchronised clock prime BUCK or BOOST or BUCK- between half-bridge topology
BOOST topology and rear class are recommended or full-bridge or half-bridge topology are controlled using synchronised clock.
As a further improvement of the present invention, rear class recommend or full-bridge or half-bridge topology be prime BUCK or
2 times of BOOST BUCK-BOOST topology clock frequency.
The present invention also provides a kind of topological structures of wide input voltage range multichannel High voltage output, mainly include prime
Perhaps BOOST topology and rear class recommend two parts prime BUCK or BOOST topology using closed-loop control to BUCK, make
BUCK output voltage stabilization is in a fixed value, and rear class push-pull topology expires duty ratio control using open loop, to guarantee each
Road output all has low laod stability and low cross regulation rate.
The present invention also provides a kind of topological structures of wide input voltage range multichannel High voltage output, it is characterised in that: main
It to include prime BUCK topology and rear class push-pull topology two parts, the prime BUCK topology uses closed-loop control, keeps BUCK defeated
Voltage stabilization is in a fixed value out, and rear class push-pull topology expires duty ratio control using open loop, to guarantee each road output
All have low laod stability and low cross regulation rate.
As a further improvement of the present invention, the prime BUCK topology includes two pole of BUCK switching tube V5, BUCK afterflow
Pipe V6, BUCK inductance L3, BUCK output capacitance C3, resistance 4, resistance R5 and adjuster, the drain electrode of the BUCK switching tube V5 connect
Input voltage vin, the source electrode of the BUCK switching tube V5 are first followed by BUCK inductance L3, inductance L4, resonance grid, rear class and recommend and open up
It flutters, the plus earth of institute BUCK freewheeling diode V6, the cathode of the BUCK freewheeling diode V6 is connected to the BUCK switching tube
Between the source electrode of V5, BUCK inductance L3, one end of the BUCK output capacitance C3 is grounded, and the BUCK output capacitance C3's is another
It is terminated between BUCK inductance L3, inductance L4, institute in parallel with the BUCK output capacitance C3 after the resistance 4, resistance R5 series connection
The grid for stating BUCK switching tube V5 is connect with one end of the adjuster, the other end of the adjuster be connected to the resistance 4,
Between resistance R5.
As a further improvement of the present invention, the resonance grid includes tuning capacitance C4, and the one of the tuning capacitance C4
It is terminated between inductance L4, rear class push-pull topology, the other end ground connection of the tuning capacitance C4.
As a further improvement of the present invention, the prime BUCK topology includes two pole of BUCK switching tube V1, BUCK afterflow
Pipe V2, BUCK coupling inductance L1, BUCK output capacitance C1, BUCK output capacitance C2, the drain electrode of the BUCK switching tube V1 connects defeated
Entering voltage Vin, the source electrode of the BUCK switching tube V1 is first followed by BUCK coupling inductance L1, resonance grid, rear class push-pull topology,
The plus earth of the BUCK freewheeling diode V2, the cathode of the BUCK freewheeling diode V2, which is connected to, described states BUCK switching tube
Between the source electrode of V1, BUCK coupling inductance L1, the BUCK coupling inductance L1 is common-mode voltage, the BUCK output capacitance C1,
One end of BUCK output capacitance C2 is grounded respectively, the other end of BUCK output capacitance C1, the BUCK output capacitance C2 respectively with
Two output ends of BUCK coupling inductance L1 connect.
The beneficial effects of the present invention are: realizing wide scope input, multichannel High voltage output, input using two kinds of topology cascades
It is isolated with output, and low laod stability (approximately less than 0.5%) may be implemented and low cross regulation rate is (approximately less than
2%).Soft switch technique may be implemented simultaneously, improve whole power-efficient.
Detailed description of the invention
Fig. 1 is a kind of topological structure block diagram of wide input voltage range multichannel High voltage output of the present invention.
Fig. 2 is a kind of topological structure schematic diagram of wide input voltage range multichannel High voltage output of the present invention.
Fig. 3 is the resonant topology schematic diagram that the BUCK+ of exemplary embodiment of the present is recommended.
Fig. 4 is the key waveforms figure of the power conversion of exemplary embodiment of the present.
Fig. 5 is the measured waveform figure of the power conversion of exemplary embodiment of the present.
Fig. 6 is another resonant topology schematic diagram that the BUCK+ of exemplary embodiment of the present is recommended.
Specific embodiment
The invention will be further described for explanation and specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, being directed to the power supply of multichannel High voltage output, it is high that the present invention provides a kind of wide input voltage range multichannels
The topological structure of output is pressed, is mainly recommended or entirely comprising prime BUCK or BOOST or BUCK-BOOST topology 3 and rear class
Perhaps 5 two parts of half-bridge topology prime BUCK or BOOST or BUCK-BOOST topology 3 uses closed-loop control to bridge, makes
BUCK output voltage stabilization is in a fixed value, and rear class is recommended or full-bridge or half-bridge topology 5 are using open loop expires duty
Than control, to guarantee that each road output all has low laod stability and low cross regulation rate.
As shown in Figure 1, the topological structure further includes surge restraint circuit 1, EMI circuit 2, intermediate-bus voltage 4, it is described
The input termination wide scope input of surge restraint circuit 1, the output end of the surge restraint circuit 1 are defeated with the EMI circuit
Enter end connection, the input of the output end of the EMI circuit 2 and the prime BUCK or BOOST BUCK-BOOST topology 3
End connection, the output end and the intermediate-bus voltage 4 of the prime BUCK or BOOST BUCK-BOOST topology 3
Input terminal connection, output end and the rear class of the intermediate-bus voltage 4 are recommended or the input of full-bridge or half-bridge topology 5
End connection, the rear class is recommended or the output of full-bridge or half-bridge topology 5 termination rear class multiple-channel output.
As shown in Figure 1, may be implemented very by topological 3 closed-loop controls of prime BUCK or BOOST or BUCK-BOOST
Stable BUCK output voltage values, i.e. intermediate-bus voltage 4, are then recommended by rear class or full-bridge or half-bridge topology 5 again
Realize that duty ratio control is expired in open loop, constant duty ratio is 45% or so.
As shown in Figure 1, the prime BUCK or BOOST or BUCK-BOOST topology 3 and the rear class recommend or
Full-bridge be perhaps connected between half-bridge topology 5 synchronised clock 6 prime BUCK or BOOST or BUCK-BOOST topology 3 and after
Grade recommend or full-bridge perhaps half-bridge topology 5 controls that rear class is recommended or full-bridge or half-bridge topology 5 are using synchronised clock 6
2 times of topological 4 clock frequencies of prime BUCK or BOOST or BUCK-BOOST.Keep the working frequency of entire power supply synchronous, prevents
Only beat frequency interferes, and reduces EMI noise.Multichannel High voltage output may be implemented using Multiple coil in transformer secondary output, due to prime BUCK
(or BOOST or BUCK-BOOST) output voltage is a very stable voltage value, is exported by the open loop of rear class converter,
Good laod stability and cross regulation rate may be implemented in secondary multichannel High voltage output.
As shown in Fig. 2, being the topological structure schematic diagram of wide input voltage range multichannel High voltage output, prime topology can be adopted
With BUCK or BOOST, according to BUCK, output par, c has BUCK inductance, and output current ripple is small；If BOOST, input unit
Dividing has BOOST inductance, and input current ripple is small, in this example using BUCK topology.Rear class topology can using push-pull topology,
Or full-bridge topology or half-bridge topology, push-pull topology is used in this example, because only needing two MOSFET using push-pull topology
Low side driving signal needs to increase isolated drive circuit, will increase it is achieved that according to full-bridge or half-bridge with two
His peripheral circuit and cost.And to the rectifier system of multichannel High voltage output, secondary output can use the rectification square of two multiplication of voltages
Formula or bridge rectifier mode or two kinds of combination.For secondary output different loads electric current, to output electric current compared with
Small output road can use the rectifier system of two voltage doubling rectifying circuit 8, can use bridge to the output biggish output road of electric current
Then formula rectification circuit 7 realizes that high-pressure multi-path exports by cascade mode.Such as in present example, realize 700V,
The 6 road High voltage outputs of 2900V, 3350V, 3640V, 5050V, 9500V.
As shown in figure 3, the resonant topology schematic diagram recommended for BUCK+.This topology uses prime BUCK topology+rear class
Push-pull topology, V5 is BUCK switching tube in BUCK topology, and V6 is BUCK freewheeling diode, and L3 is BUCK inductance, C3 BUCK
Output capacitance.In push-pull topology, T2 is push-pull transformer, and V7 and V8 are the switching tube recommended, and Lk2 is the equivalent of transformer T2
Leakage inductance, Cp3 and Cp4 are that parasitic capacitance, Cds7 and the Cds8 of transformer T2 are respectively the equivalent parasitic capacitances of switching tube V7, V8.
In addition, increasing inductance L4 and tuning capacitance C4 in this example to realize soft switch technique, the inductance of inductance L4 needs
Sufficiently large, it and BUCK stablize the voltage source exported and constitute a current source characteristic, realize LC resonance for rear class push-pull topology
Current source is provided, capacitor C4 is resonant capacitance.To realize multichannel High voltage output, transformer T2 winding quantity is inevitable more, causes to become
Depressor parasitic parameter (parasitic capacitance and leakage inductance) greatly, leads to the reduction of rear class topology efficiency, but this programme topology takes full advantage of
The parasitic parameter of transformer and the parasitic capacitance of switching tube participate in LC resonance, realize the Sofe Switch characteristic of converter switches pipe,
The no-voltage that primary side switch pipe can be thus achieved opens the zero-current switching (ZCS) of (ZVS) and secondary side rectifier diode.
As shown in figure 4, recommending the power conversion key waveforms of resonance topological for the exemplary BUCK+ of the present invention, Vg7 is switch
The drive waveforms of pipe V7, Vg8 are the drive waveforms of switching tube V8, and Vds-7 is the hourglass source electrode waveform of switching tube V7, and IL is primary side
The excitation current waveform of metal-oxide-semiconductor, Id are the rectified waveform of secondary side diode.
Realize that the no-voltage of primary side switch pipe opens the work of the zero-current switching (ZCS) of (ZVS) and secondary side rectifier diode
It is as follows to make process:
As shown in Figure 3-4, inductance L4(assume inductance L4 it is sufficiently large) and BUCK stablize export voltage source constitute an electric current
Source characteristic realizes that LC resonance provides current source for rear class push-pull topology, when switching tube V7 conducting, tuning capacitance C4 and parasitism electricity
Hold (Cp3, Cds7) and transformer leakage inductance Lk2 resonance, therefore the electric current of a sinusoidal pattern flows through switching tube V7 and output capacitance.?
Resonance current is just to zero after one section of turn-on time Ton, at this time the electric current of transformer secondary rectifier diode also resonance to zero,
The zero-current switching (ZCS) of secondary side rectifier diode, Simultaneous Switching pipe V7 shutdown.The magnetization energy being then store in transformer
For making the voltage reversal in transformer winding in magnetizing inductance and parasitic capacitance Cp3 resonance.Therefore the electricity on switching tube V7
Pressure rises to 2 times of input voltages, and the voltage drop on switching tube V8 is as low as zero, and switchs after by one section of dead time
Pipe V8 is open-minded, and the no-voltage for realizing switching tube V8 opens (ZVS).When switching tube V8 conducting, tuning capacitance C4 and parasitism electricity
Hold (Cp4, Cds8) and transformer leakage inductance Lk2 resonance, therefore the electric current of a sinusoidal pattern flows through switching tube V8 and output capacitance, it
After repeat above-mentioned identical resonant process, the no-voltage of the zero-current switching (ZCS) and switching tube V7 of realizing secondary side diode is opened
Logical (ZVS).
Fig. 5 is the power conversion measured waveform that the exemplary BUCK+ of the present invention recommends resonance topological, and channel 1 is switching tube V7
Drive waveforms, channel 2 be switching tube V7 hourglass source electrode waveform, channel 3 be primary side metal-oxide-semiconductor excitation current waveform, channel 4 is
The rectified waveform of secondary side diode.The no-voltage that primary side switch pipe V7 or V8 realization are demonstrated from actual test waveform is open-minded
(ZVS) and the zero-current switching (ZCS) of secondary side rectifier diode.
As shown in fig. 6, another the resonant topology schematic diagram recommended for BUCK+.This topology uses prime BUCK
Topology+rear class push-pull topology, V1 is BUCK switching tube in BUCK topology, and V2 is BUCK freewheeling diode, and L1 is BUCK coupling
Inductance, C1 and C2 are BUCK output capacitance.In push-pull topology, T1 is that push-pull transformer, V3 and V4 are the switching tube recommended,
Lk1 is the equivalent leakage inductance of transformer T1, and parasitic capacitance, Cds3 and the Cds4 that Cp1 and Cp2 are transformer T1 are respectively switching tube
The equivalent parasitic capacitances of V3, V4.Partially using weighting control BUCK output, pressure stabilizing is every to be exported the prime BUCK of this topology all the way,
Topology relatively shown in Fig. 3 reduces inductance L4 one big, and working principle is as it appears from the above, equally may be implemented primary side switch pipe
No-voltage open the zero-current switching (ZCS) of (ZVS) and secondary side rectifier diode.
A kind of topological structure of wide input voltage range multichannel High voltage output provided by the invention, takes full advantage of transformer
Parasitic parameter and the parasitic capacitance of switching tube participate in LC resonance, realize primary side switch pipe no-voltage open it is (ZVS) and secondary
The zero-current switching (ZCS) of side rectifier diode.
A kind of topological structure of the wide input voltage range multichannel High voltage output provided through the invention, can solve existing
The laod stability difference of the wide input voltage range multichannel High voltage output of technology and the problem of cross regulation rate difference, while can be real
Existing soft switch technique, improves whole power-efficient.And specific example of the invention, laod stability < 0.5% may be implemented,
The superior function index of cross regulation rate < 2%, the efficiency of power supply full load (output power 500W) are up to 94%.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (9)
1. a kind of topological structure of wide input voltage range multichannel High voltage output, it is characterised in that: mainly comprising prime BUCK or
Person BOOST or BUCK-BOOST topology and rear class are recommended or full-bridge or half-bridge topology two parts, the prime BUCK or
Person's BOOST or BUCK-BOOST topology uses closed-loop control, makes BUCK output voltage stabilization in a fixed value, and rear class
It recommends or full-bridge or half-bridge topology is using open loop expire duty ratio control, to guarantee that each road exports that all have low load steady
Fixed degree and low cross regulation rate.
2. the topological structure of wide input voltage range multichannel High voltage output according to claim 1, it is characterised in that: described
Topological structure further includes surge restraint circuit, EMI circuit, intermediate-bus voltage, and the input of the surge restraint circuit terminates wide
Range input, the output end of the surge restraint circuit are connect with the input terminal of the EMI circuit, the output of the EMI circuit
It holds and connect the prime BUCK or BOOST with the input terminal of the prime BUCK or BOOST perhaps BUCK-BOOST topology
Or the output end of BUCK-BOOST topology is connect with the input terminal of the intermediate-bus voltage, the intermediate-bus voltage it is defeated
Outlet is recommended with the rear class or the input terminal of full-bridge perhaps half-bridge topology connect the rear class and recommends or full-bridge or half
The output of bridge topology terminates rear class multiple-channel output.
3. the topological structure of wide input voltage range multichannel High voltage output according to claim 2, it is characterised in that: described
Prime BUCK or BOOST or BUCK-BOOST topology and the rear class recommend or full-bridge or half-bridge topology between connect
There is a synchronised clock, prime BUCK or BOOST BUCK-BOOST topology and rear class are recommended or full-bridge or half-bridge topology
It is controlled using synchronised clock.
4. the topological structure of wide input voltage range multichannel High voltage output according to claim 3, it is characterised in that: rear class
It recommends or full-bridge or half-bridge topology is 2 times of prime BUCK or BOOST BUCK-BOOST topology clock frequency.
5. a kind of topological structure of wide input voltage range multichannel High voltage output, it is characterised in that: mainly comprising prime BUCK or
Person BOOST topology and rear class recommend two parts, and the prime BUCK or BOOST topology use closed-loop control, export BUCK
Voltage stabilization is in a fixed value, and rear class push-pull topology expires duty ratio control using open loop, to guarantee that each road output is equal
With low laod stability and low cross regulation rate.
6. a kind of topological structure of wide input voltage range multichannel High voltage output, it is characterised in that: mainly opened up comprising prime BUCK
It flutters and uses closed-loop control with rear class push-pull topology two parts, the prime BUCK topology, make BUCK output voltage stabilization at one
Fixed value, and rear class push-pull topology expires duty ratio control using open loop, so that it is steady to guarantee that each road output all has low load
Fixed degree and low cross regulation rate.
7. the topological structure of wide input voltage range multichannel High voltage output according to claim 6, it is characterised in that: described
Prime BUCK topology includes BUCK switching tube V5, BUCK freewheeling diode V6, BUCK inductance L3, BUCK output capacitance C3, resistance
4, resistance R5 and adjuster, the drain electrode of the BUCK switching tube V5 connect input voltage vin, and the source electrode of the BUCK switching tube V5 is first
It is followed by BUCK inductance L3, inductance L4, resonance grid, rear class push-pull topology, the plus earth of institute BUCK freewheeling diode V6 is described
The cathode of BUCK freewheeling diode V6 is connected between the source electrode of the BUCK switching tube V5, BUCK inductance L3, the BUCK output
One end of capacitor C3 is grounded, and the another of the BUCK output capacitance C3 is terminated between BUCK inductance L3, inductance L4, the resistance
4, in parallel with the BUCK output capacitance C3 after resistance R5 series connection, the grid of the BUCK switching tube V5 and the one of the adjuster
End connection, the other end of the adjuster are connected between the resistance 4, resistance R5.
8. the topological structure of wide input voltage range multichannel High voltage output according to claim 7, it is characterised in that: described
Resonance grid includes tuning capacitance C4, and an end of the tuning capacitance C4 is connected between inductance L4, rear class push-pull topology, the tune
The other end of humorous capacitor C4 is grounded.
9. the topological structure of wide input voltage range multichannel High voltage output according to claim 6, it is characterised in that: described
Prime BUCK topology include BUCK switching tube V1, BUCK freewheeling diode V2, BUCK coupling inductance L1, BUCK output capacitance C1,
BUCK output capacitance C2, the drain electrode of the BUCK switching tube V1 connect input voltage vin, and the source electrode of the BUCK switching tube V1 is first
It is followed by BUCK coupling inductance L1, resonance grid, rear class push-pull topology, the plus earth of the BUCK freewheeling diode V2 is described
The cathode of BUCK freewheeling diode V2 is connected between the source electrode for stating BUCK switching tube V1, BUCK coupling inductance L1, described
BUCK coupling inductance L1 is common-mode voltage, and one end of BUCK output capacitance C1, the BUCK output capacitance C2 is grounded respectively, described
The other end of BUCK output capacitance C1, BUCK output capacitance C2 is connect with two output ends of BUCK coupling inductance L1 respectively.
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| CN110212777A (en) * | 2019-06-19 | 2019-09-06 | 杰华特微电子（杭州）有限公司 | The control circuit and control method for cascading circuit of reversed excitation, cascading circuit of reversed excitation |
| CN112117909A (en) * | 2020-08-24 | 2020-12-22 | 北京机械设备研究所 | Closed-loop control method of Buck + LLC cascade topology |
| CN112187039A (en) * | 2020-09-23 | 2021-01-05 | 郑州嘉晨电器有限公司 | Wide-range input power supply structure |
| CN112583273A (en) * | 2020-07-01 | 2021-03-30 | 株洲中车时代电气股份有限公司 | Double-output power supply for magnetic suspension vehicle and control method thereof |
| WO2021179888A1 (en) * | 2020-03-12 | 2021-09-16 | Oppo广东移动通信有限公司 | Power conversion circuit and charging device |
| CN115955121A (en) * | 2022-12-27 | 2023-04-11 | 广东志成冠军集团有限公司 | Auxiliary power supply for wide-input high-electrical isolation underwater special converter |
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| CN112187039A (en) * | 2020-09-23 | 2021-01-05 | 郑州嘉晨电器有限公司 | Wide-range input power supply structure |
| CN115955121A (en) * | 2022-12-27 | 2023-04-11 | 广东志成冠军集团有限公司 | Auxiliary power supply for wide-input high-electrical isolation underwater special converter |
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