CN104795876B - Intelligent charger based on multi-resonant topology - Google Patents
Intelligent charger based on multi-resonant topology Download PDFInfo
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- CN104795876B CN104795876B CN201510206259.6A CN201510206259A CN104795876B CN 104795876 B CN104795876 B CN 104795876B CN 201510206259 A CN201510206259 A CN 201510206259A CN 104795876 B CN104795876 B CN 104795876B
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
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- 239000004065 semiconductor Substances 0.000 claims description 44
- 238000005070 sampling Methods 0.000 claims description 42
- 230000005611 electricity Effects 0.000 claims description 19
- 239000003990 capacitor Substances 0.000 claims description 18
- 230000005622 photoelectricity Effects 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 15
- 230000007423 decrease Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
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Classifications
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- H02J7/027—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
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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
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention relates to a kind of intelligent charger based on multi-resonant topology; it includes AC/DC converter unit, DC/DC converter unit, controller, charge protection unit, accessory power supply; wherein, AC/DC converter unit includes inputting protection module, input filter module, surge suppression modules, AC/DC conversion rectification filtering module；Described DC/DC converter unit includes resonance modules, DC/DC conversion rectification filtering module；Charge protection unit includes output overcurrent protection module, output current limiting protection module, output over-voltage protection module, input overvoltage/undervoltage protection module.The present invention is simple to operate, highly versatile, can carry out intelligent charge to battery, and overall efficiency is higher than 90%.
Description
Technical field
The present invention relates to intelligent charge technique field and in particular to a kind of based on multi-resonant topology intelligent charger.
Background technology
At present, domestic charger adopts power frequency charger mostly, and this charger is made up of transformator and rectification circuit, though
So circuit is simple, but operating frequency is low, required transformator both bulk, and thermal losses is big, and therefore conversion efficiency is low, only
70% about, further, since the fluctuation of line voltage and frequency, output voltage current stability, not, affects charging performance；Its
Secondary, the noise feedback producing inside charger, to power supply grid, has serious harmonic wave to disturb to power supply grid；And, charger
Lack of wisdom controls and perfect defencive function, easily causes and overcharges or charge less, charging effect is undesirable, and security reliability is poor.
Content of the invention
It is an object of the invention to provide a kind of intelligent charger based on multi-resonant topology, this device is simple to operate,
Highly versatile, intelligent charge can be carried out to battery, overall efficiency is higher than 90%.
For achieving the above object, a kind of intelligent charger based on multi-resonant topology disclosed by the invention, its feature exists
In：It includes AC/DC converter unit, DC/DC converter unit, controller, charge protection unit, accessory power supply, wherein, AC/DC
Converter unit includes inputting protection module, input filter module, surge suppression modules, AC/DC conversion rectification filtering module；Described
DC/DC converter unit includes resonance modules, DC/DC conversion rectification filtering module；Charge protection unit includes output overcurrent protection
Module, output current limiting protection module, output over-voltage protection module, input overvoltage/undervoltage protection module；
Wherein, the signal output part of described input protection module is connected to surge suppression modules by input filter module
Input, the outfan of surge suppression modules connects AC/DC respectively and converts the input of rectification filtering module and accessory power supply
Input, described AC/DC converts the input of the outfan connection resonance modules of rectification filtering module, the outfan of resonance modules
Connect the input that DC/DC converts rectification filtering module；
Described accessory power supply protects to respectively controller, output overcurrent protection module, output current limiting protection module, output overvoltage
Shield module and input overvoltage/undervoltage protection module are powered；
The voltage sample outfan of described surge suppression modules connects the sampled signal input of input overvoltage/undervoltage protection module
End, the Surge suppression control signal outfan of overvoltage/undervoltage protection module connects the control end of surge suppression modules, and overvoltage/undervoltage is protected
The trigger outfan of module connects the signal input part of controller；
The current sampling signal outfan of described resonance modules connects output overcurrent protection module respectively and output current limiting is protected
The current sampling signal input of shield module, the overcurrent protection control signal outfan of described output overcurrent protection module connects control
The signal input part of device processed, the current-limiting protection control signal outfan of output current limiting protection module connects the signal input of controller
End, the voltage signal of the voltage sampling signal input connection DC/DC conversion rectification filtering module of output current limiting protection module is defeated
Go out end；
Described DC/DC converts the electricity of the voltage sampling signal outfan connection output over-voltage protection module of rectification filtering module
Pressure sampled signal input, the overvoltage protection control signal outfan of output over-voltage protection module connects the signal input of controller
End, the control signal outfan of described controller connects the control signal input of resonance modules.
The operation principle of the present invention is：The three-phase alternating current of input is through input protection module, input filter module, surge
Suppression module, AC/DC conversion rectification filtering module are converted into smooth high voltage direct current, and are transformed to high frequency friendship by resonance modules
Stream electricity, high-frequency alternating current is transformed to galvanic current by DC/DC conversion rectification filtering module.Controller sampling and outputting voltage,
After being processed through internal microprocessor, control the break-make of resonance modules switching tube, make output voltage keep stable.Exported
Stream and the current signal of output current limiting protection module sampling switch pipe, control output current through microprocessor after being processed.Defeated
Enter overvoltage/undervoltage protection module sample input voltage, compare with reference voltage afterwards to AC/DC conversion be controlled, simultaneously incited somebody to action
Under-voltage signal feeds back to controller, controls resonance modules switching tube to turn off through microprocessor.HVDC is changed by accessory power supply
For 5 road unidirectional currents be AC/DC conversion, control circuit, protection circuit provide working power.
Beneficial effects of the present invention：
DC/DC converter unit employs multi-resonant and controls power conversion technology it is achieved that " Sofe Switch " of switching tube, resonance
Switching tube in circuit is switched when drain-source both end voltage is zero, and DC/DC converts the rectification in rectification filtering module simultaneously
Diode is also operated in " Sofe Switch " state, decreases switching loss, and the conversion efficiency of charger reaches more than 90%.Resonant mode
The operating frequency of block breaker in middle pipe is 20kHz, is 400 times of traditional charger operating frequency, the transformator of use, inductance, electricity
Hold volume and weight can ratio traditional power frequency charger reduce decades of times, therefore intelligent charging machine than traditional charger small volume,
Lightweight.Using computer controls, the parameters such as charging voltage, electric current of sampling, to charging voltage, electric current real-time control, make charging
Curve more meets the charge characteristic of battery, makes charging effect more preferably, battery i.e. not charge less, only fill, ensureing battery electricity
On the premise of amount abundance, can effectively extend the service life of battery.
Brief description
Fig. 1 is the structured flowchart of the present invention；
Fig. 2 is DC/DC mapped structure block diagram in the present invention；
Fig. 3 is the structured flowchart of output overcurrent protection module in the present invention；
Fig. 4 is the structured flowchart of output current limiting protection module in the present invention；
Fig. 5 is the structured flowchart of output over-voltage protection module in the present invention；
Wherein, 1 AC/DC converter unit, 1a input protection module, 1b input filter module, 1c Surge suppression
Module, 1d AC/DC conversion rectification filtering module, 2 DC/DC converter units, 2a resonance modules, 2b DC/DC conversion are whole
Stream filtration module, 3 controllers, 4 charge protection units, 4a output overcurrent protection module, 4b output current limiting protection mould
Block, 4c output over-voltage protection module, 4d input overvoltage/undervoltage protection module, 5 accessory power supplys.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail：
The present invention based on multi-resonant topology intelligent charger, as shown in figure 1, it include AC/DC converter unit 1,
DC/DC converter unit 2, controller 3, charge protection unit 4, accessory power supply 5, wherein, AC/DC converter unit 1 includes input to be protected
Shield module 1a, input filter module 1b, surge suppression modules 1c, AC/DC conversion rectification filtering module 1d；Described DC/DC conversion
Unit 2 includes resonance modules 2a, DC/DC conversion rectification filtering module 2b；Charge protection unit 4 includes output overcurrent protection module
4a, output current limiting protection module 4b, output over-voltage protection module 4c, input overvoltage/undervoltage protection module 4d；
Wherein, the signal output part of described input protection module 1a connects surge suppression modules by input filter module 1b
The input of 1c, the outfan of surge suppression modules 1c connects AC/DC respectively and converts the input of rectification filtering module 1d and auxiliary
Help the input of power supply 5, described AC/DC converts the input of the outfan connection resonance modules 2a of rectification filtering module 1d, humorous
The outfan of module 2a of shaking connects the input that DC/DC converts rectification filtering module 2b；
Described accessory power supply 5 gives controller 3, output overcurrent protection module 4a, output current limiting protection module 4b, output respectively
Overvoltage protective module 4c and input overvoltage/undervoltage protection module 4d are powered；
The voltage sample outfan of described surge suppression modules 1c connects the sampled signal of input overvoltage/undervoltage protection module 4d
Input, the Surge suppression control signal outfan of input overvoltage/undervoltage protection module 4d connects the control of surge suppression modules 1c
End, the trigger outfan of input overvoltage/undervoltage protection module 4d connects the signal input part of controller 3；
The current sampling signal outfan of described resonance modules 2a connects output overcurrent protection module 4a and output limit respectively
The current sampling signal input of stream protection module 4b, the overcurrent protection control signal output of described output overcurrent protection module 4a
End connects the signal input part of controller 3, and the current-limiting protection control signal outfan of output current limiting protection module 4b connects control
The signal input part of device 3, the voltage sampling signal input of output current limiting protection module 4b connects DC/DC conversion rectifying and wave-filtering mould
The voltage signal output end of block 2b；
The voltage sampling signal outfan that described DC/DC converts rectification filtering module 2b connects output over-voltage protection module 4c
Voltage sampling signal input, the overvoltage protection control signal outfan of output over-voltage protection module 4c connects controller 3
Signal input part, the control signal outfan of described controller 3 connects the control signal input of resonance modules 2a.
In technique scheme, input protection module 1a includes insurance, varistor and discharge tube, charger normal work
Electric current is less than the blowout current of insurance, insures normal work, when short circuit phenomenon in the devices such as charger rectifier bridge, switching tube
When, insure quick fuse, so that charger and power supply grid is disconnected, it is to avoid power supply grid causes bigger damage to circuit for charging machine
Bad, also avoid charger after short trouble occurs, power supply grid to be impacted simultaneously.Varistor and discharge tube can be with lightning protection
Hit and absorb instantaneous high pressure.
In technique scheme, input filter module 1b includes filter capacitor and differential mode inductance, it is possible to reduce differential mode interference
And common mode disturbances.
In technique scheme, surge suppression modules 1c includes relay and high-power resistance.Surge suppression modules 1c leads to
Cross internal resistance to limit charging current it is ensured that surge current will not be produced at the filter capacitor charging initial stage.To electricity after filtering
Pressure is sampled, when voltage reaches preset value, control relay action, and current-limiting resistance short circuit decreases power attenuation.
In technique scheme, AC/DC conversion rectification filtering module 1d includes rectifier bridge, Active PFC, filtered electrical
Hold, for three-phase alternating current is transformed to unidirectional current, and improve power factor (PF).
In technique scheme, resonance modules 2a includes switching tube, resonant inductance, transformator, resonant capacitance, resonance modules
It is high-frequency alternating current that 2a is used for DC power conversion.
In technique scheme, DC/DC conversion rectification filtering module 2b includes commutation diode, filter inductance, filtered electrical
Hold, DC/DC conversion rectification filtering module 2b is used for for high-frequency alternating current being transformed to unidirectional current.
In technique scheme, the output voltage of charge requirement control charger and the electric current of battery pressed by controller 3.Control
Device 3 mainly realizes current sample, voltage sample, current control, voltage control, communication function, fault alarm function, charging curve
Selection function and defencive function.Output voltage is too high to cause catastrophic failure to electrical equipment, send out for preventing such situation
Raw, acquiescence overvoltage protection value is 63 ± 1V, charging auto-shut-off after output overvoltage, and carries out fault warning.Charger
Output current can not infinitely increase, maximum is limited to 1.05～1.15 times of output-current rating, if over loading, charger
Automatically turn down output voltage to protect charger.Charger output voltage and electric current and battery charging state pass through liquid crystal screen display
Show, user can be with the working condition of the understanding charger of intuitive and convenient.
In technique scheme, output overcurrent protection module 4a is used for the automatic shutdown when excessively stream in charger.Output
Current-limiting protection module 4b is used for limiting the output current of charger.Output over-voltage protection module 4c is used in charger outfan electricity
Automatic shutdown when pressing through high, can protect electrical equipment.Input overvoltage/undervoltage protection module 4d occurred in input three-phase alternating current
Pressure or under-voltage when, charger does not start, and can protect charger, and input voltage is less than 323VAC or during higher than 437VAC, by examining
Slowdown monitoring circuit sends stopping signal, and protection charger is without damage.Accessory power supply 5 is by control chip, switching tube, transformator, rectification
Diode forms, and is that charger control circuit, protection circuit are powered.
In technique scheme, resonance modules 2a as illustrated in figs. 1 and 2 includes metal-oxide-semiconductor S1, metal-oxide-semiconductor S2, resonant inductance
L1, transformator T1, resonant capacitance C5, resonant capacitance C6, electric capacity C1～electric capacity C4, wherein, the grid of metal-oxide-semiconductor S1 and metal-oxide-semiconductor S2
Grid connect the control signal outfan of controller 3, the drain electrode of metal-oxide-semiconductor S1 connects AC/DC and converts rectification filtering module 1d's
Outfan, one end of electric capacity C1 and electric capacity C3 connects the drain electrode of metal-oxide-semiconductor S1, and the other end of electric capacity C1 and electric capacity C3 connects metal-oxide-semiconductor
The source electrode of S1, the drain electrode of metal-oxide-semiconductor S2 connects the source electrode of metal-oxide-semiconductor S1, and the source electrode of metal-oxide-semiconductor S2 connects AC/DC conversion rectifying and wave-filtering mould
The outfan of block 1d, one end of electric capacity C2 and electric capacity C4 connects the drain electrode of metal-oxide-semiconductor S2, and the other end of electric capacity C2 and electric capacity C4 connects
The source electrode of metal-oxide-semiconductor S2, one end of described resonant inductance L1 connects the source electrode of metal-oxide-semiconductor S1, and the other end of resonant inductance L1 connects change
The primary one end of depressor T1, resonant capacitance C5 and resonant capacitance C6 that the primary other end of transformator T1 passes through series connection connect MOS
The source electrode of pipe S2, the other end of described resonant inductance L1 is provided with output overcurrent protection mould with the circuit of transformator T1 primary one end
Current signal sampling ring B of block 4a and current signal sampling ring A of output current limiting protection module 4b, described current signal sampling ring
B is the current sampling signal input of output overcurrent protection module 4a, and current signal sampling ring A is output current limiting protection module 4b
Current sampling signal input.
In technique scheme, described DC/DC conversion rectification filtering module 2b includes diode Z1, diode Z2, output
Filter capacitor C7, output filter capacitor C8 and output inductor L2, wherein, the positive pole of diode Z1 connects resonance modules 2a's
One end of T1 level of transformator, the positive pole of diode Z2 connects the other end of the T1 level of transformator of resonance modules 2a, diode
The negative pole of Z1 connects the positive pole of diode Z3, and the negative pole of diode Z2 connects the negative pole of diode Z1, output filter capacitor C7's
The negative pole of cathode connecting diode Z1, the tap of the negative pole T1 level of connection transformer of output filter capacitor C7, export filtered electrical
The tap of one end T1 level of connection transformer of sense L2, the negative pole of the cathode connecting diode Z1 of output filter capacitor C8, output
The negative pole of filter capacitor C8 connects the other end, the negative pole of described diode Z3 and the output inductor L2 of output inductor L2
The other end convert the outfan of rectification filtering module 2b for DC/DC, the two ends of described output filter capacitor C8 are DC/DC conversion
The voltage sampling signal outfan of rectification filtering module 2b.Controller 3 pumping signal drive respectively upper and lower two metal-oxide-semiconductor S1 and
Metal-oxide-semiconductor S2, makes metal-oxide-semiconductor S1, metal-oxide-semiconductor S2 alternate conduction and leaves certain interval time.When metal-oxide-semiconductor S1 turns on, metal-oxide-semiconductor S2
It is off state, the positive pole that electric current converts rectification filtering module 1d outfan Vi from AC/DC flows out, through metal-oxide-semiconductor S1, resonance electricity
Sense L1, transformator T1 armature winding, resonant capacitance C5, resonant capacitance C6, return AC/DC conversion rectification filtering module 1d outfan
The negative pole of Vi, in the process part energy exported through diode Z1 to secondary by transformer coupled, and another part energy
Amount is then stored in resonant inductance L1, in resonant capacitance C5, resonant capacitance C6.Transformator T1 primary side current by resonant inductance L1,
Resonant capacitance C5, the resonance of resonant capacitance C6 determine, this electric current assumes sine curve in the LC network that above-mentioned device is constituted and becomes
Law, thus the electric current in transformer secondary output output also changes in sinusoidal rule, therefore, the switching mode commutation diode of secondary
It is that nature turns off, be operated in Sofe Switch state, the switch spike of outfan is minimum.Between the drain-source of metal-oxide-semiconductor S1 and have electric capacity
C3, because electric capacity both end voltage can not be mutated, so metal-oxide-semiconductor S1 is zero voltage turn-off, reduces turn-off power loss.Metal-oxide-semiconductor S1 closes
After disconnected, metal-oxide-semiconductor S2 will not turn on immediately, and the electric current due to inductance can not be mutated, so the electric current in network is in resonant inductance
Continue in the presence of L1, by the flowing of former direction, at this moment to form electric capacity C3 and charge, and electric capacity C4 electric discharge, until electric capacity C3 two ends electricity
Pressure charges to input voltage, and electric capacity C4 is discharged to zero, and metal-oxide-semiconductor S2 parasitic diode turns on clamp because bearing forward voltage, MOS
The both end voltage of pipe S2 is zero, and now drive signal makes metal-oxide-semiconductor S2 turn on.Electric current in network commutates after natural zero-crossing, opens
Begin reciprocal sinusoidal variation, exports reciprocal sinusoidal current in transformer secondary output, through diode Z2 output.Equally
The drain-source of metal-oxide-semiconductor S2 simultaneously has electric capacity C4, and metal-oxide-semiconductor S2 is zero voltage turn-off.Electric current in network is in the presence of resonant inductance L1
Continue by opposite direction flowing, electric capacity C3 discharges, and electric capacity C4 charges, when electric capacity C4 both end voltage charges to input voltage value, electricity
Hold C3 and be discharged to zero, the conducting of metal-oxide-semiconductor S1 parasitic diode clamps, and now drive signal makes metal-oxide-semiconductor S1 turn on (zero-pressure conducting), opens
Begun next switch periods.The characteristic impedance of LC resonant network determines the peak power output of changer.In fact, due to
The coupling of transformator T1, output filter capacitor C7, electric capacity C8, and output inductor L2 are dividing of resonant network
, referred to as multi-resonant.In order to reduce the current stress that single device bears, improve reliability and the technical specification of circuit, filter
Ripple electric capacity, resonant capacitance are by the way of multiple parallel connections.
In technique scheme, as shown in figure 3, described output overcurrent protection module 4a includes diode D101～diode
D106, resistance R101～resistance R107, electric capacity C201, electric capacity C202, operational amplifier IC1C, operational amplifier IC1D and photoelectricity
Bonder U1, wherein, the positive pole of described diode D101 connects current signal sampling ring B, and the positive pole of diode D103 connects electricity
Stream signal sampling ring B, the negative pole of diode D102 connects the positive pole of diode D101, and the negative pole of diode D104 connects diode
The positive pole of D103, the positive pole of the cathode connecting diode D104 of diode D102, the negative pole of diode D101 connects diode
The negative pole of D103, resistance R101 and resistance 102 are connected in parallel between the negative pole of diode D103 and the positive pole of diode D104, resistance
One end of R103 connects the negative pole of diode D103, and the other end of resistance R103 connects one end of electric capacity C201, electric capacity C201's
The other end connects the positive pole of diode D104, the reverse input end of one end concatenation operation amplifier IC1D of resistance R105, resistance
The other end of R105 connects the positive pole of diode D104, and one end of resistance R105 connects the confession of accessory power supply 5 by resistance R104
Electric end, one end of resistance R106 connects the other end of resistance R103, and the other end of resistance R106 connects the positive pole of diode D104,
One end of electric capacity C202 connects one end of resistance R106, and the other end of electric capacity C202 connects the positive pole of diode D104, diode
The plus earth of D104, the in-phase input end of the other end concatenation operation amplifier IC1D of resistance R103, operational amplifier IC1D
Inverting input connect resistance R105 one end, the outfan concatenation operation amplifier IC1C's of operational amplifier IC1D is anti-phase
Input, the in-phase input end of the reverse input end concatenation operation amplifier IC1C of operational amplifier IC1D, operational amplifier
The outfan of IC1C connects the input of photoelectrical coupler U1, and the input meeting photoelectrical coupler U1 connects also by resistance R107
The feeder ear of accessory power supply 5；
The in-phase input end of the negative pole concatenation operation amplifier IC1D of diode D105, the positive pole of diode D105 connects two
The positive pole of pole pipe D106, the positive pole of diode D106 is also connected with the inverting input of operational amplifier IC1C, diode D106's
The over-current signal outfan of negative pole and photoelectrical coupler U1 is all connected with the corresponding signal input part of controller 3, photoelectrical coupler
The earth terminal ground connection of U1.Output overcurrent protection module 4a makes charging auto-shut-off when excessively stream in charger.
During normal work：When charger output current is less than the overcurrent value setting, the voltage that output current sampling obtains, warp
Resistance R103 and resistance R106 partial pressure, the homophase input terminal voltage of operational amplifier IC1D is less than reverse voltage (the power supply electricity of 12V
Pressure is through resistance R104 and resistance R105 partial pressure), operational amplifier IC1D exports low level, does not have signal to deliver to pass generator terminal and (controls
Device 3 processed).Operational amplifier IC1C exports high level, does not therefore have over-current signal to export.
When charger output current is higher than the overcurrent value setting, the voltage that output current sampling obtains, through resistance R105
With R106 partial pressure, operational amplifier IC1D homophase input terminal voltage is higher than anti-phase input terminal voltage, and operational amplifier IC1D exports
High level, this high level signal delivers to shutdown port makes charger quit work.Operational amplifier IC1D once exports Gao Ping, should
Level feeds back to the in-phase end of operational amplifier IC1D through diode D105, at this moment operational amplifier IC1D in-phase end input electricity
, always above anti-phase input terminal voltage, charger is locked for pressure, only disconnects input, turns back on and could unlock.Operation amplifier
The output low level of device IC1C, photoelectrical coupler U1 sends over-current signal to controller 3.
In technique scheme, as shown in figure 4, described output current limiting protection module 4b include resistance R1～resistance R18, two
Pole pipe D1～D7, electric capacity C101～electric capacity C105, audion Q1, audion Q2, operational amplifier IC1A, wherein, described two poles
The positive pole of pipe D1 connects current signal sampling ring A, and the positive pole of described diode D3 connects current signal sampling ring A, diode D2
Negative pole connect the positive pole of diode D1, the negative pole of diode D4 connects the positive pole of diode D3, and the positive pole of diode D2 connects
The positive pole of diode D4, the negative pole of diode D1 connects the negative pole of diode D3, and resistance R1 and resistance R2 is connected in parallel on diode D3
Negative pole and the positive pole of diode D4 between, one end of resistance R3 connects the negative pole of diode D3, and one end of electric capacity C101 connects
The other end of resistance R3, the other end of electric capacity C101 connects the positive pole of diode D4, and the base stage of audion Q1 passes through the electricity of series connection
Resistance R4 and resistance R5 connects the positive pole of diode D4, and the colelctor electrode of audion Q1 connects the positive pole of diode D4, audion Q1's
Emitter stage connects the negative pole of diode D5, and the positive pole of diode D5 connects the feeder ear of accessory power supply 5, resistance R6 by resistance R7
One end connect the other end of resistance R3, the other end of resistance R6 connects the positive pole of diode D4, and operational amplifier IC1A's is same
Phase input connects the other end of resistance R3 by resistance R9, and the inverting input of operational amplifier IC1A passes through resistance R10 even
One end of connecting resistance R8, the other end of resistance R8 connects the positive pole of diode D4, and one end of resistance R8 connects the negative of diode D7
Pole, the negative pole of the cathode connecting diode D6 of diode D7, the positive pole of diode D6 connects resistance R7；
The base stage of one end connecting triode Q1 of electric capacity C102, the base stage of one end connecting triode Q1 of resistance R11, resistance
The base stage of one end connecting triode Q1 of R12, the other end of resistance R12 connects one end of resistance R13, the other end of resistance R13
It is all connected with the negative pole of electric capacity C104 with the other end of electric capacity C102, the other end of resistance R11 connects the positive pole of electric capacity C104, described
The positive pole of electric capacity C104 and negative pole connect the voltage signal output end that DC/DC converts rectification filtering module 2b, and resistance R13's is another
End connects the positive pole of diode D4；
It is connected in parallel on the inverting input of operational amplifier IC1A and defeated with resistance R14 after resistance R15 and electric capacity C103 series connection
Go out between end, the outfan of operational amplifier IC1A passes through the base stage of resistance R16 connecting triode Q2, the emitter stage of audion Q2
Connect one end of resistance R18, between the base stage of the other end of resistance R18 and audion Q2, be parallel with resistance R17 and electric capacity C105,
The colelctor electrode of described audion Q2 connects the signal input part of controller 3.
Above-mentioned output current limiting protection module 4b working condition is divided into normal power-up stage, current limliting stage and backrush stage, its
In, the normal power-up stage：When charger output current is less than the cut-off current setting, the voltage that output current sampling obtains, warp
Resistance R3 and resistance R6 partial pressure, when operational amplifier IC1A in-phase input end voltage be less than inverting input voltage (12V's
The conduction voltage drop through diode D6 and diode D7 for the supply voltage, then through resistance R7 and resistance R8 partial pressure), operational amplifier IC1A
Output low level, audion Q2 ends, and output voltage is constant, charger normal work.
The current limliting stage：Charger output current reaches the cut-off current of setting, if continuing to load, output current sampled voltage
(through overcurrent signal sampling ring A), through resistance R3 and R6 partial pressure, operational amplifier IC1A homophase input terminal voltage is higher than anti-phase defeated
Enter terminal voltage, operational amplifier IC1A exports high level.This level, through resistance R16 and resistance R17 partial pressure, is added to audion Q2's
So that be ties positively biased, audion Q2 begins to turn on base stage.Because the emitter stage of audion Q2 is connected to R18, audion Q2 is operated in
Amplification region, the collector voltage of audion Q2 reduces, and the pulse width modulator reference voltage in controller 3 is pulled low, at this moment pulsewidth
Manipulator reference voltage can promote output voltage to reduce less than output feedback voltage so that pulse width modulator adjustment pulsewidth, and defeated
Going out electric current keeps the cut-off current setting constant.
The backrush stage：If continuing to load, output voltage may proceed to reduce, when reaching the backrush magnitude of voltage of setting, output
Voltage delivers to audion Q1 base stage through resistance R11, resistance R4, resistance R5 partial pressure, when audion Q1 base voltage is less than diode
The voltage of D5 positive pole, audion Q1 begins to turn on, and diode D5 cathode voltage is pulled low, and then operational amplifier IC1A is anti-phase defeated
Enter terminal voltage to be pulled low, cut-off current reduces, and charger output current, voltage decline simultaneously.
When output short-circuit, due to the reference voltage of pulse width modulator in controller 3 have audion Q2 PN junction pressure drop and
The pressure drop of resistance R18, without being pulled low to zero, so module output voltage will not drop to zero, typically in 1V about.In addition
Because output voltage is not zero, the pressure drop that formed on resistance R4 and resistance R5 along with the base current of audion Q1, so
Audion Q2 base voltage also will not be zero, and therefore, output current also will not be zero, typically the 15% of output current rating
Within.After short circuit releases, charger output voltage can automatically restore to setting value.
In technique scheme, as shown in figure 5, described output over-voltage protection module 4c includes electric capacity C301～electric capacity
C303, resistance R201～resistance R206, diode D201～diode D203, operational amplifier IC1E, operational amplifier IC1F,
Photoelectrical coupler U101, wherein, the two ends of described electric capacity C301 connect the output filtered electrical that DC/DC converts rectification filtering module 2b
Hold C8 two ends, resistance R201 one end connects the anode of electric capacity C301, the resistance R201 other end connects one end of electric capacity C302, electric capacity
The other end of C302 connects the negative terminal of electric capacity C301, and one end of resistance R202 connects one end of electric capacity C302, and resistance R202's is another
One end connects the other end of electric capacity C302 by resistance R203, and the other end of resistance R202 connects the positive pole of diode D201, and two
The in-phase input end of the negative pole concatenation operation amplifier IC1F of pole pipe D201, the reverse input end of operational amplifier IC1F connects electricity
One end of resistance R205, the other end ground connection of resistance R205, one end of electric capacity C303 connects one end of resistance R205, electric capacity C303's
The other end is grounded, and the reverse input end of operational amplifier IC1F connects the feeder ear of accessory power supply 5 by resistance R204, and computing is put
The in-phase input end of big device IC1F connects the negative pole of diode D202, the positive pole concatenation operation amplifier IC1F's of diode D202
Outfan, the inverting input of the outfan concatenation operation amplifier IC1E of operational amplifier IC1F, operational amplifier IC1F's
The in-phase input end of inverting input concatenation operation amplifier IC1E, the outfan of operational amplifier IC1E connects photoelectrical coupler
The input of U101, the input of photoelectrical coupler U101 connects the feeder ear of accessory power supply 5, diode by resistance R206
The over-pressed signal output of the positive pole of the cathode connecting diode D202 of D203, the negative pole of diode D203 and photoelectrical coupler U101
End is all connected with the corresponding signal input part of controller 3, the earth terminal ground connection of photoelectrical coupler U101.Output over-voltage protection module 4c
Make charging auto-shut-off when overvoltage in charger outfan, electrical equipment can be protected.
Charger output voltage is followed by the homophase of operational amplifier IC1F through resistance R201, R202, R203 electric resistance partial pressure
Input, the 12V reference voltage of accessory power supply 5 is followed by the anti-of operational amplifier IC1F through resistance R204, resistance R205 partial pressure
Phase input, when charger output exceedes setting value, operational amplifier IC1F exports high level, and this level is through diode D202
Feed back to the in-phase input end of operational amplifier IC1F, at this moment the homophase input terminal voltage of operational amplifier IC1F is always than anti-phase
Input terminal voltage is high, and charger is locked, only disconnects input, turns back on and could unlock.The output of operational amplifier IC1F
High level is connected to the inverting input of operational amplifier IC1E, makes operational amplifier IC1E export low level, by photoelectric coupling
Device U101 sends over voltage alarm signal to controller 3.
The content that this specification is not described in detail belongs to prior art known to professional and technical personnel in the field.
Claims (5)
1. a kind of based on multi-resonant topology intelligent charger it is characterised in that：It includes AC/DC converter unit (1), DC/
DC converter unit (2), controller (3), charge protection unit (4), accessory power supply (5), wherein, AC/DC converter unit (1) includes
Input protection module (1a), input filter module (1b), surge suppression modules (1c), AC/DC conversion rectification filtering module (1d)；
Described DC/DC converter unit (2) includes resonance modules (2a), DC/DC conversion rectification filtering module (2b)；Charge protection unit
(4) include output overcurrent protection module (4a), output current limiting protection module (4b), output over-voltage protection module (4c), inputted
Under-voltage protective module (4d)；
Wherein, the signal output part of described input protection module (1a) connects surge suppression modules by input filter module (1b)
(1c) input, the outfan of surge suppression modules (1c) connects the input that AC/DC converts rectification filtering module (1d) respectively
End and the input of accessory power supply (5), the outfan that described AC/DC converts rectification filtering module (1d) connects resonance modules (2a)
Input, the outfan of resonance modules (2a) connects the input that DC/DC converts rectification filtering module (2b)；
Described accessory power supply (5) respectively give controller (3), output overcurrent protection module (4a), output current limiting protection module (4b),
Output over-voltage protection module (4c) and input overvoltage/undervoltage protection module (4d) power supply；
The voltage sample outfan of described surge suppression modules (1c) connects the sampled signal of input overvoltage/undervoltage protection module (4d)
Input, the Surge suppression control signal outfan of input overvoltage/undervoltage protection module (4d) connects the control of surge suppression modules (1c)
End processed, the trigger outfan of input overvoltage/undervoltage protection module (4d) connects the signal input part of controller (3)；
The current sampling signal outfan of described resonance modules (2a) connects output overcurrent protection module (4a) and output limit respectively
The current sampling signal input of stream protection module (4b), the overcurrent protection control signal of described output overcurrent protection module (4a)
Outfan connects the signal input part of controller (3), the current-limiting protection control signal outfan of output current limiting protection module (4b)
Connect the signal input part of controller (3), the voltage sampling signal input of output current limiting protection module (4b) connects DC/DC and becomes
Change the voltage signal output end of rectification filtering module (2b)；
The voltage sampling signal outfan that described DC/DC converts rectification filtering module (2b) connects output over-voltage protection module (4c)
Voltage sampling signal input, the overvoltage protection control signal outfan of output over-voltage protection module (4c) connects controller
(3) signal input part, the control signal outfan of described controller (3) connects the control signal input of resonance modules (2a)
End；
Described resonance modules (2a) include metal-oxide-semiconductor S1, metal-oxide-semiconductor S2, resonant inductance L1, transformator T1, resonant capacitance C5, resonance electricity
Hold C6, electric capacity C1～electric capacity C4, wherein, the grid of the grid of metal-oxide-semiconductor S1 and metal-oxide-semiconductor S2 connects the control signal of controller (3)
Outfan, the outfan of drain electrode connection AC/DC conversion rectification filtering module (1d) of metal-oxide-semiconductor S1, the one of electric capacity C1 and electric capacity C3
End connects the drain electrode of metal-oxide-semiconductor S1, and the other end of electric capacity C1 and electric capacity C3 connects the source electrode of metal-oxide-semiconductor S1, and the drain electrode of metal-oxide-semiconductor S2 connects
The source electrode of metal-oxide-semiconductor S1, the source electrode of metal-oxide-semiconductor S2 connects outfan, electric capacity C2 and the electric capacity that AC/DC converts rectification filtering module (1d)
One end of C4 connects the drain electrode of metal-oxide-semiconductor S2, and the other end of electric capacity C2 and electric capacity C4 connects the source electrode of metal-oxide-semiconductor S2, described resonance electricity
One end of sense L1 connects the source electrode of metal-oxide-semiconductor S 1, one end of the other end connection transformer T1 primary of resonant inductance L1, transformator
The primary other end of T1 passes through the source electrode of the resonant capacitance C5 and resonant capacitance C6 connection metal-oxide-semiconductor S2 of series connection, described resonant inductance
The circuit of the other end of L1 and transformator T1 primary one end is provided with current signal sampling ring B of output overcurrent protection module (4a)
With current signal sampling ring A of output current limiting protection module (4b), described current signal sampling ring B is output overcurrent protection module
(4a) current sampling signal input, current signal sampling ring A is the current sampling signal of output current limiting protection module (4b)
Input.
2. according to claim 1 based on multi-resonant topology intelligent charger it is characterised in that：Described DC/DC becomes
Change rectification filtering module (2b) and include diode Z1～diode Z2, output filter capacitor C7, output filter capacitor C8 and output
Filter inductance L2, wherein, the positive pole of diode Z1 connects one end of the T1 level of transformator of resonance modules (2a), diode Z2's
Positive pole connects the other end of the T1 level of transformator of resonance modules (2a), and the negative pole of diode Z1 connects the positive pole of diode Z3,
The negative pole of diode Z2 connects the negative pole of diode Z1, the negative pole of the cathode connecting diode Z1 of output filter capacitor C7, output
The tap of the negative pole T1 level of connection transformer of filter capacitor C7, one end T1 level of connection transformer of output inductor L2
Tap, the negative pole of the cathode connecting diode Z1 of output filter capacitor C8, the negative pole of output filter capacitor C8 connects output filtering
The other end of inductance L2, the negative pole of described diode Z3 and the other end of output inductor L2 convert rectifying and wave-filtering for DC/DC
The outfan of module (2b), the voltage that the two ends of described output filter capacitor C8 convert rectification filtering module (2b) for DC/DC is adopted
Sample signal output part.
3. according to claim 1 based on multi-resonant topology intelligent charger it is characterised in that：Described output overcurrent
Protection module (4a) include diode D101～diode D106, resistance R101～resistance R107, electric capacity C201, electric capacity C202,
Operational amplifier IC1C, operational amplifier IC1D and photoelectrical coupler U1, wherein, the positive pole of described diode D101 connects electric current
The positive pole of signal sampling ring B, diode D103 connects current signal sampling ring B, and the negative pole of diode D102 connects diode
The positive pole of D101, the negative pole of diode D104 connects the positive pole of diode D103, the cathode connecting diode of diode D102
The positive pole of D104, the negative pole of diode D101 connects the negative pole of diode D103, and resistance R101 and resistance 102 are connected in parallel on diode
Between the positive pole of the negative pole of D103 and diode D104, one end of resistance R103 connects the negative pole of diode D103, resistance R103
The other end connect one end of electric capacity C201, the other end of electric capacity C201 connects the positive pole of diode D104, the one of resistance R105
The inverting input of end concatenation operation amplifier IC1D, the other end of resistance R105 connects the positive pole of diode D104, resistance
One end of R105 connects the feeder ear of accessory power supply (5) by resistance R104, and one end of resistance R106 connects the another of resistance R103
One end, the other end of resistance R106 connects the positive pole of diode D104, and one end of electric capacity C202 connects one end of resistance R106, electricity
The other end holding C202 connects the positive pole of diode D104, the plus earth of diode D104, and the other end of resistance R103 connects
The in-phase input end of operational amplifier IC1D, the inverting input of operational amplifier IC1D connects one end of resistance R105, computing
The inverting input of the outfan concatenation operation amplifier IC1C of amplifier IC1D, the reverse input end of operational amplifier IC1D is even
Connect the in-phase input end of operational amplifier IC1C, the outfan of operational amplifier IC1C connects the input of photoelectrical coupler U1,
The input meeting photoelectrical coupler U1 connects the feeder ear of accessory power supply (5) also by resistance R107；
The in-phase input end of the negative pole concatenation operation amplifier IC1D of diode D105, the cathode connecting diode of diode D105
The positive pole of D106, the positive pole of diode D106 is also connected with the inverting input of operational amplifier IC1C, the negative pole of diode D106
It is all connected with the corresponding signal input part of controller (3) with the over-current signal outfan of photoelectrical coupler U1, photoelectrical coupler U1's
Earth terminal is grounded.
4. according to claim 1 based on multi-resonant topology intelligent charger it is characterised in that：Described output current limiting
Protection module (4b) includes resistance R1～resistance R18, diode D1～D7, electric capacity C101～electric capacity C105, audion Q1, three poles
Pipe Q2, operational amplifier IC1A, wherein, the positive pole of described diode D1 connects current signal sampling ring A, described diode D3's
Positive pole connects current signal sampling ring A, and the negative pole of diode D2 connects the positive pole of diode D1, and the negative pole of diode D4 connects two
The positive pole of pole pipe D3, the positive pole of the cathode connecting diode D4 of diode D2, the negative pole of diode D1 connects the negative of diode D3
Pole, resistance R1 and resistance R2 are connected in parallel between the negative pole of diode D3 and the positive pole of diode D4, and one end of resistance R3 connects two
The negative pole of pole pipe D3, one end of electric capacity C101 connects the other end of resistance R3, and the other end of electric capacity C101 connects diode D4's
Positive pole, the base stage of audion Q1 passes through the positive pole of the resistance R4 and resistance R5 connection diode D4 of series connection, the current collection of audion Q1
Pole connects the positive pole of diode D4, and the emitter stage of audion Q1 connects the negative pole of diode D5, and the positive pole of diode D5 passes through electricity
Resistance R7 connects the feeder ear of accessory power supply (5), and one end of resistance R6 connects the other end of resistance R3, and the other end of resistance R6 connects
The positive pole of diode D4, the in-phase input end of operational amplifier IC1A connects the other end of resistance R3 by resistance R9, and computing is put
The inverting input of big device IC1A connects one end of resistance R8 by resistance R10, and the other end of resistance R8 connects diode D4's
Positive pole, one end of resistance R8 connects the negative pole of diode D7, the negative pole of the cathode connecting diode D6 of diode D7, diode D6
Positive pole connect resistance R7；
The base stage of one end connecting triode Q1 of electric capacity C102, the base stage of one end connecting triode Q1 of resistance R11, resistance R12
One end connecting triode Q1 base stage, the other end of resistance R12 connects one end, the other end of resistance R13 and the electricity of resistance R13
The other end holding C102 is all connected with the negative pole of electric capacity C104, and the other end of resistance R11 connects the positive pole of electric capacity C104, described electric capacity
The positive pole of C104 and negative pole connect the voltage signal output end that DC/DC converts rectification filtering module (2b), the other end of resistance R13
Connect the positive pole of diode D4；
It is connected in parallel on inverting input and the outfan of operational amplifier IC1A with resistance R14 after resistance R15 and electric capacity C103 series connection
Between, the outfan of operational amplifier IC1A passes through the base stage of resistance R16 connecting triode Q2, and the emitter stage of audion Q2 connects
One end of resistance R18, is parallel with resistance R17 and electric capacity C105 between the base stage of the other end of resistance R18 and audion Q2, described
The colelctor electrode of audion Q2 connects the signal input part of controller (3).
5. according to claim 1 based on multi-resonant topology intelligent charger it is characterised in that：Described output overvoltage
Protection module (4c) include electric capacity C301～electric capacity C303, resistance R201～resistance R206, diode D201～diode D203,
Operational amplifier IC1E, operational amplifier IC1F, photoelectrical coupler U101, wherein, the two ends of described electric capacity C301 connect DC/DC
The output filter capacitor C8 two ends of conversion rectification filtering module (2b), resistance R201 one end connects the anode of electric capacity C301, resistance
One end of R201 other end connection electric capacity C302, the negative terminal of the other end connection electric capacity C301 of electric capacity C302, the one of resistance R202
End connects one end of electric capacity C302, and the other end of resistance R202 connects the other end of electric capacity C302, resistance by resistance R203
The other end of R202 connects the positive pole of diode D201, the homophase input of the negative pole concatenation operation amplifier IC1F of diode D201
End, the reverse input end of operational amplifier IC1F connects one end of resistance R205, the other end ground connection of resistance R205, electric capacity C303
One end connect one end of resistance R205, the other end ground connection of electric capacity C303, the reverse input end of operational amplifier IC1F passes through
Resistance R204 connects the feeder ear of accessory power supply (5), and the in-phase input end of operational amplifier IC1F connects the negative of diode D202
Pole, the outfan of the positive pole concatenation operation amplifier IC1F of diode D202, the outfan concatenation operation of operational amplifier IC1F
The inverting input of amplifier IC1E, the homophase input of the inverting input concatenation operation amplifier IC1E of operational amplifier IC1F
End, the outfan of operational amplifier IC1E connects the input of photoelectrical coupler U101, and the input of photoelectrical coupler U101 leads to
Cross the feeder ear that resistance R206 connects accessory power supply (5), the positive pole of the cathode connecting diode D202 of diode D203, diode
The negative pole of D203 is all connected with the corresponding signal input part of controller (3), photoelectricity with the over-pressed signal output part of photoelectrical coupler U101
The earth terminal ground connection of bonder U101.
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| CN109672257B (en) * | 2018-12-28 | 2022-10-28 | 长园深瑞继保自动化有限公司 | Flexible control method and system for auxiliary power supply of direct current charging module |
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| CN110932555A (en) * | 2019-11-06 | 2020-03-27 | 青岛航天半导体研究所有限公司 | Power supply direct current output method |
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