CN203691037U - Solar energy charging controller based on ATmega128 single-chip microcomputer - Google Patents
Solar energy charging controller based on ATmega128 single-chip microcomputer Download PDFInfo
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- CN203691037U CN203691037U CN201420067766.7U CN201420067766U CN203691037U CN 203691037 U CN203691037 U CN 203691037U CN 201420067766 U CN201420067766 U CN 201420067766U CN 203691037 U CN203691037 U CN 203691037U
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- 238000002955 isolation Methods 0.000 claims abstract description 15
- 238000005070 sampling Methods 0.000 claims abstract description 14
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
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- 230000010355 oscillation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000013083 solar photovoltaic technology Methods 0.000 description 1
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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
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Abstract
The utility model relates to a solar energy charging controller based on an ATmega128 single-chip microcomputer and belongs to the solar energy charging equipment technology field. A technical scheme is characterized in that a solar cell panel (1), a Cuk circuit unit (2) and a storage battery (8) are successively connected; an output terminal of the ATmega128 single-chip microcomputer (6) is mutually connected with an input terminal of the Cuk circuit unit (2) through a PWM control circuit unit (3); an output terminal of the Cuk circuit unit (2) is mutually connected with the PWM control circuit unit (3) through an isolation feedback unit (4) and is mutually connected with an input terminal of the ATmega128 single-chip microcomputer (6) through a sampling unit (5); a liquid crystal display unit (7) is mutually connected with the output terminal of the ATmega128 single-chip microcomputer (6). The controller of the utility model takes an AVR single-chip microcomputer ATmega128 as a core; the storage battery is used to control a carrier; on-chip resources in the high-performance AVR single-chip microcomputer are fully used; through the ATmega128 single-chip microcomputer and 1602 liquid crystal, voltage sampling and display are performed; energy generated by a 75w photovoltaic cell panel can be fully used and solar energy can be effectively used.
Description
Technical field
The utility model relates to a kind of solar charging controller based on ATmega128 single-chip microcomputer, belongs to solar recharging equipment technical field.
Background technology
Worldwide high speed development of solar energy power generating in recent years, the R & D Level of China's solar-photovoltaic technology is also improving constantly, and China's family expenses photovoltaic generating system is mainly direct current system at present.The electric energy that photovoltaic cell sends charges a battery, and storage battery can directly be powered to all kinds of loads, and the equipment that urgent need can make full use of photovoltaic cell energy occurs.
Utility model content
The utility model object is to provide a kind of solar charging controller based on ATmega128 single-chip microcomputer, utilize Analog Electronics Technique, power electronic technology and single-chip microcomputer signal acquisition process technology to complete solar panel in the control procedure of charge in batteries, Cuk(copped wave) circuit realize buck change, isolation feedback realizes constant voltage charge, PWM(pulse width modulation) control and drive and can work according to feedback signal situation control Cuk circuit unit.Make full use of 75 w(watts) energy that produces of photovoltaic battery panel, solve the problems referred to above that exist in background technology.
The technical solution of the utility model is: a kind of solar charging controller based on ATmega128 single-chip microcomputer, comprise solar panel, Cuk circuit unit, pwm control circuit unit, isolation feedback unit, sampling unit, ATmega128 single-chip microcomputer, liquid crystal display and storage battery, described solar panel, Cuk circuit unit, storage battery connects successively, the output of ATmega128 single-chip microcomputer is connected to each other by the input of pwm control circuit unit and Cuk circuit unit, the output of Cuk circuit unit is connected to each other by isolation feedback unit and pwm control circuit unit respectively, input by sampling unit and ATmega128 single-chip microcomputer is connected to each other, the output of liquid crystal display and ATmega128 single-chip microcomputer is connected to each other.
Described pwm control circuit unit comprises TL494 integrated chip.
Described isolation feedback unit comprises optocoupler PC817 element.
Described sampling unit is A/D(analog/digital conversion after 1/4 dividing potential drop) sampled voltage unit.
Described solar panel is 75W photovoltaic battery panel.
The beneficial effects of the utility model are: take AVR single chip computer AT mega128 as core, with storage battery control carrier, make full use of the interior resource of sheet of high-performance AVR single-chip microcomputer, main Cuk circuit unit and the optocoupler Voltage Feedback of adopting, and utilize TL494 to realize PWM and control, LM393 adds complementary power amplifier and realizes driving, carries out voltage sample and demonstration by ATmega128 single-chip microcomputer and 1602 liquid crystal, the energy that 75 w photovoltaic battery panels produce can be made full use of, solar energy can be more effectively utilized.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is the schematic diagram of Cuk circuit unit of the present utility model;
Fig. 3 is the schematic diagram of the utility model isolation feedback unit;
In figure: solar panel 1; Cuk circuit unit 2; Pwm control circuit unit 3; Isolation feedback unit 4; Sampling unit 5; ATmega128 single-chip microcomputer 6; Liquid crystal display 7; Storage battery 8.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the utility model is described in further detail.
A kind of solar charging controller based on ATmega128 single-chip microcomputer, comprise solar panel 1, Cuk circuit unit 2, pwm control circuit unit 3, isolation feedback unit 4, sampling unit 5, ATmega128 single-chip microcomputer 6, liquid crystal display 7 and storage battery 8, described solar panel 1, Cuk circuit unit 2, storage battery 8 connects successively, the output of ATmega128 single-chip microcomputer 6 is connected to each other by pwm control circuit unit 3 and the input of Cuk circuit unit 2, the output of Cuk circuit unit 2 is connected to each other with pwm control circuit unit 3 by isolation feedback unit 4 respectively, be connected to each other by sampling unit 5 and the input of ATmega128 single-chip microcomputer 6, liquid crystal display 7 is connected to each other with the output of ATmega128 single-chip microcomputer 6.
Described pwm control circuit unit 3 comprises TL494 integrated chip.
Described isolation feedback unit 4 comprises optocoupler PC817 element.
Described sampling unit 5 is A/D(analog/digital conversion after 1/4 dividing potential drop) sampled voltage unit.
Described solar panel 1 is 75W photovoltaic battery panel.
DC/DC(DC-DC) selection of transformation topology structure adopts Cuk circuit unit, and in fact this circuit is exactly Boost-Buck circuit, can recently realize by the conducting of power ratio control switching tube and time the conversion of voltage, can also realize buck.And this circuit continuous input current, switching tube common end grounding.PWM controls and adopts special integrated chip as TL494.Integrated circuit has stable performance, higher, the self-powered benchmark of precision, is easy to realize closed-loop control, required peripheral cell pwm signal frequency few, that produce high and do not need the advantages such as complicated programming.Feedback circuit Scheme Choice adopts the form of light-coupled isolation TIA31.This feedback number is isolated with output signal, and feedback accuracy is high, is easy to reach requirement.Adopt the special integrated chip of metal-oxide-semiconductor to drive as IR2110.This chip gate drive voltage wide ranges (10～20 V), Schmidt's logic input, incoming level and TTL and COMS level compatibility, Dead Time is built-in, and output, input homophase, after Dead Time adjustment is exported on low limit and input inversion.And special integrated chip performance is good, volume is little, therefore select the special integrated chip IR2110 of metal-oxide-semiconductor to drive.
1, DC-DC change-over circuit--Cuk circuit unit
Cuk circuit unit is a kind of DC converter circuit of can ascending, descending pressing, and it can regard a kind of switching circuit that booster circuit and reduction voltage circuit combine substantially as, and its schematic diagram as shown in Figure 2.Its input and output voltage closes and is in theory:, regulate duty ratio D, conducting and the recently regulation output voltage of turn-off time of the joint switching tube that withers.
2, the pwm control circuit based on TL494
TL494 is the pulse width modulation circuit of 1 fixed frequency, and frequency of oscillation is decided by 5,6 pin external resistance and electric capacity, f
osc=1.1/RC, its upper limiting frequency is 400 kHz; 14 pin ground connection are Single-end output mode in parallel.
3, feedback circuit
Voltage feedback circuit effect is that to guarantee that charge controller is exported to battery tension stable, and optocoupler PC817 realizes the isolation of input and output.When output voltage becomes large, R
19Athe voltage of upper point just becomes the voltage higher than TL431 reference edge greatly, so that TL431 is open-minded, and optocoupler input current is larger, and in optocoupler, light-operated triode is saturated, passes through R
19Dhigher current potential is given to the l end of TL494.1 pin is the input in the same way of TL494 internal error amplifier, changes the pwm signal of control signal by TL494, thereby makes output voltage stabilization.
4, the design of sampling output display
Because the excursion that is input to 12 V storage battery both end voltage should be controlled at 11.8～14.7 V.Reach after 14.7 V maximum limit voltages in charging voltage, keep this voltage to continue to fill 2-4 h and just reach capacity.So the input of storage battery two ends is sampled after 1/4 dividing potential drop by resistance, specifically adopts 6.0 pins of MSP430 single-chip microcomputer to complete sampling.And by MSP430 single-chip microcomputer and 1602 liquid crystal, programming realizes the input voltage that shows the front storage battery of dividing potential drop two ends.And complete voltage by program and exceed 14.7 V upper limit Times warning lamps flickers, 1602 show " VOLTAGE HIGH ".When voltage also glimmers lower than 11.8 V lower limit Times warning lamps, 1602 show " VOLTAGE LOW ".Because maximum charging current is about 8 A, adopt 8 A fuses to realize the overcurrent protection of hardware circuit at this.
Claims (5)
1. the solar charging controller based on ATmega128 single-chip microcomputer, it is characterized in that: comprise solar panel (1), Cuk circuit unit (2), pwm control circuit unit (3), isolation feedback unit (4), sampling unit (5), ATmega128 single-chip microcomputer (6), liquid crystal display (7) and storage battery (8), described solar panel (1), Cuk circuit unit (2), storage battery (8) connects successively, the output of ATmega128 single-chip microcomputer (6) is connected to each other by pwm control circuit unit (3) and the input of Cuk circuit unit (2), the output of Cuk circuit unit (2) is connected to each other by isolation feedback unit (4) and pwm control circuit unit (3) respectively, be connected to each other by sampling unit (5) and the input of ATmega128 single-chip microcomputer (6), liquid crystal display (7) is connected to each other with the output of ATmega128 single-chip microcomputer (6).
2. a kind of solar charging controller based on ATmega128 single-chip microcomputer according to claim 1, is characterized in that: described pwm control circuit unit (3) comprises TL494 integrated chip.
3. a kind of solar charging controller based on ATmega128 single-chip microcomputer according to claim 1, is characterized in that: described isolation feedback unit (4) comprises optocoupler PC817 element.
4. a kind of solar charging controller based on ATmega128 single-chip microcomputer according to claim 1, is characterized in that: described sampling unit (5) is A/D sampled voltage unit after 1/4 dividing potential drop.
5. a kind of solar charging controller based on ATmega128 single-chip microcomputer according to claim 1, is characterized in that: described solar panel (1) is 75W photovoltaic battery panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420067766.7U CN203691037U (en) | 2014-02-17 | 2014-02-17 | Solar energy charging controller based on ATmega128 single-chip microcomputer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420067766.7U CN203691037U (en) | 2014-02-17 | 2014-02-17 | Solar energy charging controller based on ATmega128 single-chip microcomputer |
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| Publication Number | Publication Date |
|---|---|
| CN203691037U true CN203691037U (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420067766.7U Expired - Lifetime CN203691037U (en) | 2014-02-17 | 2014-02-17 | Solar energy charging controller based on ATmega128 single-chip microcomputer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106602996A (en) * | 2016-11-28 | 2017-04-26 | 徐海恩 | Solar cell controller based on AVR single-chip microcomputer |
-
2014
- 2014-02-17 CN CN201420067766.7U patent/CN203691037U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106602996A (en) * | 2016-11-28 | 2017-04-26 | 徐海恩 | Solar cell controller based on AVR single-chip microcomputer |
| CN106602996B (en) * | 2016-11-28 | 2019-03-19 | 浙江向日葵光能科技股份有限公司 | A kind of solar-electricity pool controller based on AVR single chip |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140702 |
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| CX01 | Expiry of patent term |