CN205377783U - Maximum power point tracks control system - Google Patents
Maximum power point tracks control system Download PDFInfo
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- CN205377783U CN205377783U CN201521016949.7U CN201521016949U CN205377783U CN 205377783 U CN205377783 U CN 205377783U CN 201521016949 U CN201521016949 U CN 201521016949U CN 205377783 U CN205377783 U CN 205377783U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The utility model discloses a maximum power point tracks control system, including rectifier module (3), a rectifier circuit (301), the 2nd rectifier circuit (302) that rectifier module (3) poikilitic texture is the same, a rectifier circuit (301) are parallelly connected mutually with the 2nd rectifier circuit (302), a rectifier circuit (301) contain MOS pipe Q14, Q18, Q20, and the 2nd rectifier circuit (302) contain MOS pipe Q12, Q19, Q31, MOS pipe Q14 is as a rectifier circuit's (301) last bridge arm, and MOS manages Q18, the Q20 lower bridge arm as a rectifier circuit (301), in like manner, MOS pipe Q12 be as the 2nd rectifier circuit's (302) last bridge arm, and MOS manages Q19, the Q31 lower bridge arm as the 2nd rectifier circuit (302), this rectifier module adopts the two -way transmission for inside MOS pipe generate heat little, the transmission electric current is big, power transfer is efficient, rectifier module's lower bridge arm adopt two MOS pipe control mode improved the speed of switch, improved rectifier module the drive characteristic, reduced the EMI interference. Rectifier module adopts electric capacity to restrain spike, makes inside MOS be in control reliable protection.
Description
Technical field
This utility model relates to technical field of new energies, follows the trail of the system of maximum power point particularly to the solaode that controls based on BUCK circuit.
Background technology
Solar energy, because of the advantage such as resource is never exhausted, pollution-free, is just developed rapidly.MPPT (maximum power point tracking) controller, for the maximum power point of solar energy output is tracked, makes the efficiency of transmission that the maintenance of solar panel moment is maximum, improves the ROA of the energy.
But, existing MPPT controls system, and current carrying capability is little when transmitting electric energy for the switching tube in its internal BUCK circuit, easily generate heat, the efficiency of transmission of power of influence electric energy, and BUCK circuit is subject to electromagnetic interference, break-make speed is slow, have impact on maximum power point tracking efficiency.
Existing maximum power point tracking system or the protective measure not to solar panel and accumulator, system causes damage probably due to cross stream, adverse current or device reversal connection etc.；Or the MPPT possessing solar panel and accumulator protecting function controls system, its structure is complicated, service life is short.
Utility model content
For the deficiencies in the prior art, this utility model provides a kind of maximum power point tracking system, and maximum power point tracking system power efficiency of transmission is high, protective measure is complete.
To achieve these goals, technical solutions of the utility model are as follows:
A kind of maximum power point tracking system, including rectification module.Rectification module comprises: the first rectification circuit that structure is identical, the second rectification circuit；First rectification circuit and the second rectification circuit are in parallel.
First rectification circuit comprises metal-oxide-semiconductor Q14, Q18, Q20, and the second rectification circuit comprises metal-oxide-semiconductor Q12, Q19, Q31；Metal-oxide-semiconductor Q14 is as the upper brachium pontis of the first rectification circuit, and metal-oxide-semiconductor Q18, Q20 are as the lower brachium pontis of the first rectification circuit；In like manner, metal-oxide-semiconductor Q12 is as the upper brachium pontis of the second rectification circuit, and metal-oxide-semiconductor Q19, Q31 are as the lower brachium pontis of the second rectification circuit.The S pole of metal-oxide-semiconductor Q14 is connected with the S pole of metal-oxide-semiconductor Q12, and its junction point is the outfan of this rectification module.
In first rectification circuit, the S pole of metal-oxide-semiconductor Q14 is connected with the D pole of metal-oxide-semiconductor Q18, and the S pole of metal-oxide-semiconductor Q18 is connected with the S pole of metal-oxide-semiconductor Q20, the D pole ground connection of metal-oxide-semiconductor Q20；The G of metal-oxide-semiconductor Q14, Q18, Q20 extremely respectively connects a biasing resistor；Each divider resistance in parallel between the G pole of metal-oxide-semiconductor Q14, Q18 and S pole, and between the S pole of metal-oxide-semiconductor Q14, Q18 and D pole respectively in parallel one for eliminating the electric capacity of metal-oxide-semiconductor spike；The biasing resistor that the G of metal-oxide-semiconductor Q14 extremely goes up is in parallel with Schottky diode through a current-limiting resistance, the D pole of metal-oxide-semiconductor Q14 connects a filter capacitor, this filter capacitor is for carrying out prime filtering and a stabilivolt in parallel between G pole with S pole to the voltage of rectification module input；The G pole of metal-oxide-semiconductor Q18 is through a stabilivolt ground connection.In like manner, the connected mode of the second rectification circuit is identical with the connected mode of the first rectification circuit.
Further, this maximum power point tracking system also includes solar panel protection module.Solar panel protection module comprises: prime voltage acquisition unit, instruction reception unit, switch control unit, rear class voltage acquisition unit.Prime voltage acquisition unit, switch control unit, rear class voltage acquisition unit are sequentially connected with；Instruction reception unit is connected with switch control unit.
Prime voltage acquisition unit comprises diode D33, electric capacity C97, resistance R14, R122, R121.Diode D33 is through resistance R14, R122 ground connection；Resistance R121 one end is connected with the points of common connection of resistance R14, R122, and the other end is the outfan of prime voltage acquisition unit；Resistance R121 is through electric capacity C97 ground connection.
Instruction reception unit comprises audion Q6, Q8, Q10, Q44, resistance R30, R34, R29, R25, R24, R147, R32, electric capacity C80, C79, diode D5, D6, D7, D8.The base stage of audion Q10 is connected with resistance R34, grounded emitter；The base stage of audion Q8 is connected with the colelctor electrode of resistance R30, audion Q10 respectively, and the colelctor electrode of audion Q8 is connected with the base stage of audion Q6 through resistance R29, diode D7；Resistance R25 is connected between the base stage of audion Q6, emitter stage；The base stage of audion Q44 is connected with the colelctor electrode of audion Q6, and the base stage of audion Q44 is connected with emitter stage through diode D8, R24, and the colelctor electrode of audion Q44 connects with resistance R32；Stabilivolt D10 is connected in parallel between emitter stage and the colelctor electrode of audion Q44；Diode D5, D6 are in parallel with C80 after connecting；The negative electrode of diode D6 is connected with the emitter stage of audion Q6, and the anode of diode D6 is connected with electric capacity C79.
Switch control unit comprises metal-oxide-semiconductor switches set, filter capacitor group, TVS pipe group.Metal-oxide-semiconductor switches set, for the break-make of control circuit, is made up of the metal-oxide-semiconductor of several parallel connections；Filter capacitor group is used for filtering, and is made up of the electric capacity of several parallel connections；TVS pipe group, for surge voltage is released, is made up of several TVS pipe；TVS pipe group is connected between input and the ground of metal-oxide-semiconductor switches set；Filter capacitor group is connected between outfan and the ground of metal-oxide-semiconductor switches set.
Rear class voltage acquisition unit comprises diode D13, electric capacity C87, resistance R62, R150, R149；Diode D13 is through resistance R62, R150 ground connection；Resistance R149 one end is connected with the points of common connection of resistance R62, R150, and the other end is the outfan of described rear class voltage acquisition unit (704)；Resistance R149 is through electric capacity C87 ground connection.
Further, this maximum power point tracking system also includes the anti-reverse module of accumulator.The anti-reverse module of accumulator comprises the control circuit, the on-off circuit that are sequentially connected with.
Control circuit comprises audion Q34, Q33, diode D23, resistance R95, R96, R97.The base stage of audion Q34 is connected with resistance R97, and the emitter stage of audion Q34 is directly grounded.The base stage of audion Q33 is connected with colelctor electrode through resistance R96；Resistance R96, diode D23 connect and are connected between the colelctor electrode of audion Q34 and the base stage of audion Q33.
On-off circuit comprises metal-oxide-semiconductor Q9, Q4, Q32, Q22, Q16, Q21, resistance R221, R145, R59, R61, R58, R60, R197.The D pole of metal-oxide-semiconductor Q9, Q4, Q32, Q22, Q16, Q21 is connected with each other, and S pole is ground connection respectively；Resistance R197 is connected respectively through the G pole of resistance R221, R145, R59, R61, R58, R60 with each metal-oxide-semiconductor Q9, Q4, Q32, Q22, Q16, Q21.
Further, this maximum power point tracking system also includes: main control module, driving module, output filtration module, current sample module, ice storing time module, solar panel, accumulator.Wherein, solar panel, solar panel protection module, rectification module, output filtration module, accumulator are sequentially connected with.Main control module is connected to rectification module through driving module.Current sample module is connected with output filtration module and is connected with accumulator.The anti-reverse module of ice storing time module, accumulator is connected with accumulator respectively；Current sample module, ice storing time module, the anti-reverse module of accumulator are also connected with main control module respectively.
The beneficial effects of the utility model:
(1) rectification module 3 of this maximum power point tracking system adopts two-way transmission so that internal metal-oxide-semiconductor heating is little, transmission electric current is big, electric energy efficiency of transmission is high；The lower brachium pontis of rectification module adopts double; two metal-oxide-semiconductor control mode to improve the speed of switch, improve the drive characteristic of rectification module, reduce EMI interference.Rectification module 3 adopts electric capacity that spike is suppressed, and makes internal metal-oxide-semiconductor be protected reliably.(2) the employing solar panel protection module 7 of this maximum power point tracking system, has and prevents solar panel reversal connection and prevent solar panel to be reversed charging dual-use function；And this solar panel protection module 7 simple in construction, surge voltage is released by internal employing TVS pipe group, reduces the instant high-voltage injury to this maximum power point tracking system.(3) the anti-reverse module 8 of the employing accumulator of this maximum power point tracking system, it is to avoid the generation of reverse connection of accumulator situation；The anti-reverse module of this accumulator 8 adopts many metal-oxide-semiconductors to realize on-off control, and simple in construction, long service life, efficiency are high.
Accompanying drawing explanation
Fig. 1 is the structural representation of this maximum power point tracking system.
Fig. 2 is the rectification module 3 principle schematic with output filtration module 4 of this maximum power point tracking system.
Fig. 3 is the principle schematic of the current sample module 5 of this maximum power point tracking system.
Fig. 4 is the principle schematic of the ice storing time module 6 of this maximum power point tracking system.
Fig. 5 is the principle schematic of the solar panel protection module 7 of this maximum power point tracking system.
Fig. 6 is the principle schematic of the anti-reverse module 8 of accumulator of this maximum power point tracking system.
Fig. 1 includes main control module 1, drives module 2, rectification module 3, output filtration module 4, current sample module 5, ice storing time module 6, solar panel protection module 7, the anti-reverse module 8 of accumulator, solar panel 9, accumulator 10.
Detailed description of the invention
As it is shown in figure 1, this maximum power point tracking system includes main control module 1, drives module 2, rectification module 3, output filtration module 4, current sample module 5, ice storing time module 6, solar panel protection module 7, the anti-reverse module 8 of accumulator, solar panel 9, accumulator 10.
Solar panel 9, solar panel protection module 7, rectification module 3, output filtration module 4, accumulator 10 are sequentially connected with; main control module 1 is connected with rectification module 3 through driving module 2; current sample module 5 is connected with output filtration module 4; the anti-reverse module 8 of ice storing time module 6, accumulator is connected with accumulator 10 respectively, and the anti-reverse module 8 of current sample module 5, ice storing time module 6, accumulator is also connected with main control module 1 respectively.
Main control module 1 is used for reception and the computing of data, sends control instruction etc., and main control module 1 sends PWMH, PWML signal, by the work of PWMH, PWML whistle control system.The high level of PWMH, PWML signal is 3.3V.Module 2 is driven to be driven the work of rectification module 3 by PWMH, PWML signal that main control module 1 sends.Rectification module 3 is for carrying out rectification by the energy after input filter unit 7.The voltage that rectification module 3 is exported by output filtration module 4 is filtered.Current sample module 5 is for the size of electric current in acquisition system.Ice storing time module 6 is for gathering the size of accumulator 10 voltage.Solar panel protection module 7 is used for preventing solar panel 9 reversal connection and preventing solar panel 9 by accumulator 10 reverse charging.The anti-reverse module 8 of accumulator is used for preventing reverse connection of accumulator.
The core parts of main control module 1 are MCU chip, and in the present embodiment, preferential selection model is the MCU chip of dsPIC33E, and the running voltage of this chip is 3.3V.The voltage collected, electric current are carried out computing by main control module 1, then pass through the dutycycle controlling PWMH, PWML signal to control the break-make of rectification module 3 internal switch pipe, realize the control to rectification module 3 output voltage and electric current, so that this maximum power point tracking system always works on maximum power point.Simultaneously; the signal collected also is judged by main control module 1; then control the relevant protection circuit of this maximum power point tracking system, make maximum power point tracking system realize reverse current protection, overcurrent protection, prevent accumulator 10 reversely charging, prevent solar panel plate 9 and accumulator 10 reversal connection etc..
Drive the core parts of module 2 for driving dynamic chip, employing ir281s driving chip in the present embodiment, two inputs of driving chip receive PWMH, PWML signal respectively, by internal processing and amplifying, PWMH, PWML signal are separately converted to HO, LO signal that can drive rectification module 3.HO, LO signal, for controlling the switch in rectification module 3, makes rectification module 3 realize energy transmission and control.
Fig. 2 is the rectification module 3 principle schematic with output filtration module 4 of this maximum power point tracking system.
Rectification module 3 in Fig. 2 comprises metal-oxide-semiconductor Q12, Q14, Q18, Q19, Q20, Q31, stabilivolt D3, D9, D22, D26, Schottky diode D70, D71, D12, resistance R46, R202, R131, R48, R201, R132, R56, R133, R57, R135, R93, R94, R44, R45, R52, R104, electric capacity C40, C41, C67, C85, electric capacity C38, C39.
The G pole of metal-oxide-semiconductor Q12, Q14 receives the HO signal that drive circuit unit 2 sends, and the D pole (node PV_POWER) of metal-oxide-semiconductor Q12, Q14 receives the energy of solar panel protection module 7 output.The G pole of metal-oxide-semiconductor Q18, Q19, Q20, Q31 receives the LO signal that drive circuit unit 2 sends simultaneously.Rectification module 3 adopts two-way rectification, and in the first rectification circuit, the S pole of metal-oxide-semiconductor Q14 is connected with the D pole of metal-oxide-semiconductor Q18, the S pole of metal-oxide-semiconductor Q18 is connected with the S pole of metal-oxide-semiconductor Q20；In like manner, in the second rectification circuit, the S pole of metal-oxide-semiconductor Q12 is connected with the D pole of metal-oxide-semiconductor Q19, the S pole of metal-oxide-semiconductor Q19 is connected with the S pole of metal-oxide-semiconductor Q31.The S pole of metal-oxide-semiconductor Q12 is connected with the S pole of metal-oxide-semiconductor Q14, and the D pole of metal-oxide-semiconductor Q20 is connected and ground connection with the D pole of metal-oxide-semiconductor Q31.
One end of electric capacity C38 is connected with the D pole of metal-oxide-semiconductor Q12, other end ground connection；In like manner, one end of electric capacity C39 be connected with the D pole of metal-oxide-semiconductor Q14, other end ground connection.Electric capacity C38, C39 are respectively used to be that the first rectification circuit, the second rectification circuit are filtered.The G pole of metal-oxide-semiconductor Q14 is connected with resistance R48, and resistance R48 is in parallel with Schottky diode D70 through resistance R201, and Schottky diode D70, for accelerating the cut-off speed of metal-oxide-semiconductor Q14, improves switch efficiency.Stabilivolt D9 and resistance R132 is connected in parallel between the G pole of metal-oxide-semiconductor Q14 and D pole respectively；Resistance R48, R132 starting voltage bias, stabilivolt D9 plays overvoltage protection effect.In like manner, the G pole of metal-oxide-semiconductor Q12 is connected with resistance R46, and resistance R46 is in parallel with Schottky diode D71 through resistance R46, and stabilivolt D3 and resistance 131 are connected in parallel between the G pole of metal-oxide-semiconductor Q12 and D pole respectively.The G pole of metal-oxide-semiconductor Q18 is connected with resistance R56, and resistance R133 is connected in parallel between the G pole of metal-oxide-semiconductor Q18 and D pole.The G pole of metal-oxide-semiconductor Q19 is connected with resistance R57, and resistance 135 is connected in parallel between the G pole of metal-oxide-semiconductor Q12 and D pole.The G pole of metal-oxide-semiconductor Q20 is connected with resistance R93；The G pole of metal-oxide-semiconductor Q31 is connected with resistance R94.Electric capacity C41 is connected in parallel between the D pole of metal-oxide-semiconductor Q14 and S pole through resistance R45, and electric capacity C41 can absorb the spike of metal-oxide-semiconductor Q14, improves EMI；In like manner, electric capacity C40 is connected in parallel between the D pole of metal-oxide-semiconductor Q12 and S pole through resistance R44；Electric capacity C85 is connected in parallel between the D pole of metal-oxide-semiconductor Q18 and S pole through resistance R52；Electric capacity C67 is connected in parallel between the D pole of metal-oxide-semiconductor Q12 and S pole through R104.Stabilivolt D22 is connected in parallel between the G pole of metal-oxide-semiconductor Q18 and the D pole of metal-oxide-semiconductor Q20, and stabilivolt D26 is connected in parallel between the G pole of metal-oxide-semiconductor Q19 and the D pole of metal-oxide-semiconductor Q31.The outfan of rectification module 3 is through Schottky diode D12 ground connection, and the direction controls the plus earth of diode.
Rectification module 3 adopts two-way rectification can reduce the heating of metal-oxide-semiconductor, improves transmission electric current, puies forward the ability of high energy transmission.The lower brachium pontis of the first rectification circuit is done in metal-oxide-semiconductor Q18, Q20 parallel connection, plays the effect of high-speed switch, can be effectively improved the drive characteristic of rectification module, reduces EMI interference.In like manner, the lower brachium pontis of the second rectification circuit is done in metal-oxide-semiconductor Q19, Q31 parallel connection.Metal-oxide-semiconductor Q14, Q12 make the upper brachium pontis of the first rectification circuit, the second rectification circuit respectively.First rectification circuit, the second rectification circuit upper brachium pontis receive the HO signal of drive circuit unit 2 simultaneously；First rectification circuit, the second rectification circuit lower brachium pontis receive the LO signal of drive circuit unit 2 simultaneously.Each stabilivolt in rectification module 3 prevents the level of HO, LO signal excessive and damages metal-oxide-semiconductor.
In Fig. 2 export filtration module 4 comprise be sequentially connected with inductance L3, sampling resistor, electric capacity C7, C48.The voltage that rectification module 3 is exported by output filtration module 4 by inductance L3, electric capacity C7, C48 is filtered, and the electric current transmitting energy in system is converted into voltage for the main control module 1 information to system by sampling resistor R50.In the present embodiment, being composed in parallel by resistance R49, R50, R55 in sampling resistor, the big I of sampling resistor is configured by adjusting the size of resistance R49, R50, R55.The outfan of output filtration module 4 is connected with accumulator.
Fig. 3 is current sample module 5 principle schematic of this maximum power point tracking system.Current sample module 5 comprises comparator U12A, PNP type triode Q29, switching tube D18, electric capacity C94, C95, C96, resistance R116, R117, R118, R119, R120.
Resistance R83, R79 are two inputs of current sample module 5.The in-phase input end of comparator U12A, inverting input are connected with resistance R83, R79 respectively；The outfan of comparator U12A is connected with the base stage of PNP type triode Q29；The inverting input of comparator U12A is connected with the emitter stage of PNP type triode Q29；The input of the running voltage of comparator U12A is through electric capacity C68 ground connection.Electric capacity C71 is connected in parallel between the base stage of PNP type triode Q29 and emitter stage；The colelctor electrode of PNP type triode Q29 sequentially passes through through switching tube D18, resistance R87, R89 ground connection；The outfan that points of common connection is this current sample module 5 of resistance R87 and resistance R89.Electric capacity C75 is in parallel with resistance 89.
The input of current sample module 5 is connected between sampling resistor and accumulator 10 negative pole, and the charging current in system is acquired, and collection information is passed to main control module 1.
When system be accumulator 10 charge time, comparator U12A is by judging the size of charging current, and export correspondingly sized voltage to control the conducting degree of PNP type triode Q29, the PNP type triode Q29 size according to comparator U12A Control of Voltage current sample module 5 output voltage exported.The output voltage of current sample module 5 carries the size of charging current and the information in direction, and the output voltage of current sample module 5 passes to main control module 1.The size of charging current is judged by the MCU chip of main control module 1, by control cutoff circuit or reduction charging current, system can be carried out adverse current, overcurrent protection.Diode D32 prevents electric current from pouring in down a chimney and burns current sample module 5.Resistance R79, R83 play metering function, reduce the power consumption of current sample module 5, play the effect of filtering with electric capacity C73 simultaneously.The output voltage of current sample module 5 is filtered so that current sample module 5 outfan charging current information is more accurate by electric capacity C75.
Fig. 4 is ice storing time module 6 principle schematic of this maximum power point tracking system.Ice storing time module 6 is for gathering the charging voltage size of accumulator 10, according to the voltage swing of the accumulator 10 that ice storing time module 6 collects, main control module 1 can judge whether accumulator 10 is full of, when accumulator 10 is full of, main control module 1 controls system and stops charging, it is prevented that accumulator 10 overcharges.
Ice storing time module 6 comprises comparator U17A, electric capacity C110, C111, C103, C104, resistance R222, R224, R226, R252, R250, R219.
Two inputs of resistance R222, R224 respectively this ice storing time module 6.The input of resistance R222, R224 connects resistance R252.The in-phase input end of comparator U17A, inverting input are connected with resistance R222, R224 respectively.Electric capacity C111 is connected in parallel between the in-phase input end of comparator U17A, inverting input.The in-phase input end of comparator U17A is through resistance R226 ground connection, and through electric capacity C110 ground connection.The outfan of comparator U17A is connected with resistance R219；Resistance R219 is the outfan of ice storing time module 6, and the outfan of resistance R219 is through electric capacity C104 ground connection.The outfan of comparator U17A is connected with inverting input through resistance R250, and electric capacity C103 is connected in parallel between outfan and the inverting input of comparator U17A.
Ice storing time module 6 also comprises resistance R223, R213, R216 of being sequentially connected in series with resistance R222, with resistance R224 resistance R225, R214, R215 being sequentially connected in series, the resistance R253 connected with resistance R252, the resistance R218 connected with resistance R226, the resistance R217 connected with resistance R250.
Fig. 5 is the principle schematic of the solar panel protection module 7 of this maximum power point tracking system.Solar panel protection module 7 includes prime voltage acquisition unit 701, instruction reception unit 702, switch control unit 703, rear class voltage acquisition unit 704.Switch control unit 703 is for controlling the energy transmission of solar panel 9；Prime voltage acquisition unit 701 is for gathering the voltage of switch control unit 703 energy input end；Rear class voltage acquisition unit 701 is for gathering the voltage of switch control unit 703 energy outfan；Instruction reception unit 702 is for receiving the instruction controlling module 1 and controlling opening or closing of switch control unit 703.Prime voltage acquisition unit 701, rear class voltage acquisition unit 704 are connected on the energy input end of switch control unit 703, energy outfan respectively, and the outfan of instruction reception unit 702 is connected with the signal input part of switch control unit 703.
Prime voltage acquisition unit 701 includes diode D33, electric capacity C97, resistance R14, R122, R121.Diode D33 is through resistance R14, R122 ground connection；Resistance R121 one end is connected with the points of common connection of resistance R14, R122, and the other end is the outfan of prime voltage acquisition unit 701；Resistance R121 is through electric capacity C97 ground connection.Electric capacity C97 is used for filtering.Prime voltage acquisition unit 701 also includes the resistance R22 connected with resistance R14.The information of voltage of collection is passed to main control module 1 from PC_VI outfan by prime voltage acquisition unit 701.
Instruction reception unit 702 comprises audion Q6, Q8, Q10, Q44, resistance R30, R34, R220, R29, R25, R24, R147, R32, electric capacity C22, C80, C21, C64, C79, diode D5, D6, D7, D8.
The base stage of audion Q10 is connected with resistance R34, grounded emitter；The base stage of audion Q8 is connected with the colelctor electrode of resistance R30, audion Q10 respectively, and the colelctor electrode of audion Q8 is connected with the base stage of audion Q6 through resistance R220, R29, diode D7；Resistance R25 is connected between the base stage of audion Q6, emitter stage；The base stage of audion Q44 is connected with the colelctor electrode of audion Q6, and base stage is connected with emitter stage through diode D8, R24, the colelctor electrode of audion Q44 is connected with resistance R32, the input of resistance R32 connects with the positive pole of solar panel, and the base stage of audion Q44 is connected with solar panel 9 positive pole through resistance R147；Stabilivolt D10 is connected in parallel between emitter stage and the colelctor electrode of audion Q44.Diode D5, D6 are in parallel with electric capacity C22, C80 respectively after connecting, and the negative electrode of diode D6 is connected with the emitter stage of audion Q6, and the anode of diode D6 is connected with external drive chip through electric capacity C79, and electric capacity C21, C64 are in parallel with electric capacity C79 respectively.The outfan of the transmitting of audion Q44 extremely instruction reception unit 702.Audion Q8, Q10 are NPN type triode, triode Q6, Q44 is PNP type triode.Audion Q44 releases for the electric charge that the parasitic capacitance within metal-oxide-semiconductor is stored.CCP1, DR_PV, C1OUT port accepts the instruction of main control module 1 respectively.
Switch control unit 703 comprises metal-oxide-semiconductor switches set, filter capacitor group, TVS pipe group.Filter capacitor group is used for filtering, and comprises electric capacity C51, C52, C53, C81, C88, C101, C102 parallel with one another.TVS pipe group is for releasing to surge voltage, thus protection circuit, comprises TVS pipe TVS4 parallel with one another, TVS5, TVS6.
Metal-oxide-semiconductor switches set, for the break-make of control circuit, comprises metal-oxide-semiconductor Q13, Q3, Q7, Q15, Q17, Q23, resistance R43, R144, R102, R47, R51, R54.
Metal-oxide-semiconductor Q13, Q3, Q7, Q15, Q17, Q23 are in parallel；R43, R144, R102, R47, R51, R54 are connected on the G pole of metal-oxide-semiconductor Q13, Q3, Q7, Q15, Q17, Q23 respectively；The G pole node of metal-oxide-semiconductor Q13, Q3, Q7, Q15, Q17, Q23 is for the instruction of reception control unit 1, and S pole node is the energy input end of switch control unit 703, and D pole node is the energy outfan of switch control unit 703；The S pole of metal-oxide-semiconductor Q23 through TVS pipe group ground connection, the extremely filtered capacitance group ground connection of D.
Rear class voltage acquisition unit 704 includes diode D13, electric capacity C87, resistance R62, R150, R149.The connection of the same step voltage collecting unit 701 is identical, and diode D13 is through resistance R62, R150 ground connection；Resistance R149 one end is connected with the points of common connection of resistance R62, R150, and the other end is the outfan of rear class voltage acquisition unit 704；Resistance R149 is through electric capacity C87 ground connection.Electric capacity C87 is used for filtering.Rear class voltage acquisition unit 704 also includes the resistance R65 connected with resistance R62.The information of voltage of collection is passed to main control module 1 from PC_VIC outfan by rear class voltage acquisition unit 704.
Solar panel protects module 7 prevent solar panel 9 reversal connection and prevent accumulator 10 for two kinds of functions of solar panel 9 reversely charging.Solar panel protection module 7 is connected between solar panel 9 and rectification module 3 (in figure, PV+ connects solar panel 9, PV_POWER connects rectification module 3).Prime voltage acquisition unit 701, rear class voltage acquisition unit 704 energy input end and energy outfan to switch control unit 703 respectively carries out voltage acquisition, and then information of voltage sends to main control module 1.Switch control unit 703 is unidirectional conducting switch, and when solar panel 9 correctly connects or the energy of solar panel 9 normally exports, electric current can directly flow through from switch control unit 703.When solar panel 9 reversal connection, or when night accumulator voltage cause that accumulator 10 is reversely energized to solar panel 9 higher than the voltage of solar panel 9 time, the voltage of the energy input end of switch control unit 703 is lower than the voltage of energy outfan, main control module 1(is by DR_PV, C1OUT pin in figure) send control signal to instruction reception unit 702, instruction reception unit 702 controls switch control unit 703 backward stop.
Fig. 6 is accumulator anti-reverse module 8 principle schematic of this maximum power point tracking system.The anti-reverse module 8 of accumulator comprises the control circuit 801, the on-off circuit 802 that are sequentially connected with.Instruction that control circuit 801 sends for receiving main control module 1 and control opening or closing of on-off circuit 802.On-off circuit 802 is for controlling conducting and the cut out of accumulator 10 charging.
Control circuit 801 comprises audion Q34, Q33, diode D23, resistance R95, R96, R97.The base stage of audion Q34 is connected with resistance R97, and the emitter stage of audion Q34 is directly grounded.The base stage of audion Q33 is connected through resistance R96 and 12V electricity power supply, and the colelctor electrode of audion Q33 is connected with 12V power supply.Resistance R96, diode D23 connect and are connected between the colelctor electrode of audion Q34 and the base stage of audion Q33.Resistance R96 is used for dividing potential drop, and diode D23 prevents the reverse conducting of electric current.
On-off circuit 802 comprises metal-oxide-semiconductor Q9, Q4, Q32, Q22, Q16, Q21, resistance R221, R145, R59, R61, R58, R60, R197.The D pole of metal-oxide-semiconductor Q9, Q4, Q32, Q22, Q16, Q21 is connected on the negative pole end of accumulator respectively, S pole is held with being connected on respectively, and resistance R197 is connected respectively through the G pole of resistance R221, R145, R59, R61, R58, R60 with each metal-oxide-semiconductor Q9, Q4, Q32, Q22, Q16, Q21.Resistance R197 is used for dividing potential drop.
To the rate of exchange of accumulator 10 both end voltage, main control module 1 is by detecting whether accumulator connects correctly.When accumulator 10 correctly connects, main control module 1 provides high level signal for resistance R97, audion Q34, Q33 turn on, 12V voltage is powered through the G pole that audion Q33 is each metal-oxide-semiconductor in on-off circuit 802, each metal-oxide-semiconductor conducting in on-off circuit 802, forming loop between solar panel 9 and accumulator 10, accumulator 10 can charge normal.When accumulator 10 reversal connection, main control module provides low level signal for resistance R97, audion Q34 ends, the base voltage of audion Q33 is driven high, audion Q33 is also switched off, each metal-oxide-semiconductor in on-off circuit 802 is because the voltage of G pole is pulled low so ending, and solar panel plate 9 is separated with accumulator 10.So, just cannot be electrically charged during accumulator 10 reversal connection, thus protecting accumulator 10.
The method for tracing of the peak power of this maximum power point tracking system is:
1, charge closing: detect that solar panel voltage ratio storage battery needs when forcing down the abnormal conditions such as (evening), overtemperature to close charging, PWMH and PMWL equal output low level during closedown.
2, start charging process, detect that solar panel voltage exceedes battery tension (daytime) and without exception, start charging process, it is desirable to as follows: a. manages up and down and all retains dead band and the delayed PWMH of PWML；B.PWMH keeps dutycycle minimum, and frequency is 40KHZ；C.PWML keeps dutycycle minimum, and frequency is 4KHZ.
3, starting tracing process, after process 2 completes, main control unit 1 is automatically into starting tracing process, and output PWM exports according to the following rules in the process: a. manages all reservation delayed PWMH of dead band PWML up and down；B.PWML keeps dutycycle minimum, and frequency is 4KHZ；C.PWMH keeps dutycycle progressively to be strengthened by step-length by minimum, and frequency is 40KHZ.
4, tracing process, after process 3 completes, main control unit 1 automatically continues tracing process, and output PWM exports according to the following rules in the process: a. manages up and down and all retains dead band and the delayed PWMH of PWML；B.PWML keeps dutycycle minimum, and frequency is 4KHZ；C.PWMH keeps dutycycle to strengthen by step-length, and frequency is 40KHZ；D. the output current value in tracing process is recorded.
5, tracing process terminates, and after PWMH dutycycle increases to setting maximum duty cycle, will terminate tracing process, and output PWM exports according to the following rules in the process: a. manages up and down and all retains dead band and the delayed PWMH of PWML；B.PWML keeps dutycycle minimum, and frequency is 4KHZ；C.PWMH dutycycle increases to maximum, and frequency is 40KHZ.
Above-described is only preferred implementation of the present utility model, and this utility model is not limited to above example.Other being appreciated that those skilled in the art directly derive under the premise without departing from basic conception of the present utility model or associate improves and change is all considered as being included within protection domain of the present utility model.
Claims (1)
1. a maximum power point tracking system, including rectification module (3), it is characterised in that:
Described rectification module (3) comprises identical the first rectification circuit (301) of structure, the second rectification circuit (302)；
First rectification circuit (301) and the second rectification circuit (302) are in parallel；
First rectification circuit (301) comprises metal-oxide-semiconductor Q14, Q18, Q20, and the second rectification circuit (302) comprises metal-oxide-semiconductor Q12, Q19, Q31；Metal-oxide-semiconductor Q14 is as the upper brachium pontis of the first rectification circuit (301), and metal-oxide-semiconductor Q18, Q20 are as the lower brachium pontis of the first rectification circuit (301)；In like manner, metal-oxide-semiconductor Q12 is as the upper brachium pontis of the second rectification circuit (302), and metal-oxide-semiconductor Q19, Q31 are as the lower brachium pontis of the second rectification circuit (302)；
The S pole of metal-oxide-semiconductor Q14 is connected with the S pole of metal-oxide-semiconductor Q12, and its junction point is the outfan of this rectification module (3)；
In first rectification circuit (301), the S pole of metal-oxide-semiconductor Q14 is connected with the D pole of metal-oxide-semiconductor Q18, and the S pole of metal-oxide-semiconductor Q18 is connected with the S pole of metal-oxide-semiconductor Q20, the D pole ground connection of metal-oxide-semiconductor Q20；The G of metal-oxide-semiconductor Q14, Q18, Q20 extremely respectively connects a biasing resistor；Each divider resistance in parallel between the G pole of metal-oxide-semiconductor Q14, Q18 and S pole, and between the S pole of metal-oxide-semiconductor Q14, Q18 and D pole respectively in parallel one for eliminating the electric capacity of metal-oxide-semiconductor spike；The biasing resistor that the G of metal-oxide-semiconductor Q14 extremely goes up is in parallel with Schottky diode through a current-limiting resistance, the D pole of metal-oxide-semiconductor Q14 connects a filter capacitor, this filter capacitor carries out prime filtering and a stabilivolt in parallel between G pole with S pole for the voltage that rectification module (3) is inputted；The G pole of metal-oxide-semiconductor Q18 is through a stabilivolt ground connection；
In like manner, the connected mode of the second rectification circuit (302) is identical with the connected mode of the first rectification circuit (301).
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| CN201521016949.7U CN205377783U (en) | 2015-12-09 | 2015-12-09 | Maximum power point tracks control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111030315A (en) * | 2019-12-03 | 2020-04-17 | 广东电科院能源技术有限责任公司 | Wireless charging system of underwater equipment, coil of wireless charging system and maximum power tracking method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111030315A (en) * | 2019-12-03 | 2020-04-17 | 广东电科院能源技术有限责任公司 | Wireless charging system of underwater equipment, coil of wireless charging system and maximum power tracking method |
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