CN204145035U - Novel low-cost MPPT charge controller - Google Patents
Novel low-cost MPPT charge controller Download PDFInfo
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- CN204145035U CN204145035U CN201420665561.9U CN201420665561U CN204145035U CN 204145035 U CN204145035 U CN 204145035U CN 201420665561 U CN201420665561 U CN 201420665561U CN 204145035 U CN204145035 U CN 204145035U
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Abstract
Novel low-cost MPPT charge controller comprises DC chopped-wave translation circuit, the first electromagnetic relay, the second electromagnetic relay, optical coupler, control circuit and sampling resistor; Solar panel is connected storage battery by the first electromagnetic relay K1, DC chopped-wave translation circuit with the second electromagnetic relay K2 successively, the negative pole of storage battery is by sampling resistor RR2 ground connection, and the first current detecting end of control circuit is connected between sampling resistor RR2 and storage battery; The control end controlling single channel connects the first electromagnetic relay K1 and the second electromagnetic relay K2; The pwm signal end of this control circuit connects DC chopped-wave translation circuit.Above-mentioned MPPT charge controller is conducive to the utilance improving solar energy, and cost is low.
Description
Technical field
The present invention relates to a kind of novel low-cost MPPT charge controller.
Background technology
MPPT(Maximum Power Point Tracking, MPPT maximum power point tracking) controller can the generating voltage of detecting real-time solar panels, and follow the trail of ceiling voltage current value (VI), the system Maximum Power Output of making charges a battery.MPPT controller real-time sampling PV input voltage and PV input current, then try to achieve the long-pending most value of input voltage and input current, think that now load and PV are optimum Match, will obtain the conversion of maximum solar energy, to reach the object of MPPT maximum power point tracking.
But, maximal power tracing due to existing MPPT controller is electric current and voltage based on following the trail of solar panel, and the power output of solar panel needs just to input to storage battery through circuit at different levels such as rectification circuit, for making up the error of therefore output, need set up other circuit or increase measurement data, make circuit structure complicated, with high costs, and solar energy utilization ratio is low.
Summary of the invention
For the deficiencies in the prior art, object of the present invention is intended to provide a kind of novel low-cost MPPT charge controller solved the problems of the technologies described above.
For achieving the above object, the present invention adopts following technical scheme:
A kind of MPPT charge controller, it comprises DC chopped-wave translation circuit, the first electromagnetic relay, the second electromagnetic relay, optical coupler, control circuit and sampling resistor;
Solar panel is connected storage battery by the first electromagnetic relay K1, DC chopped-wave translation circuit with the second electromagnetic relay K2 successively, the negative pole of storage battery is by sampling resistor RR2 ground connection, and the first current detecting end of control circuit is connected between sampling resistor RR2 and storage battery; The control end of control circuit connects the first electromagnetic relay K1 and the second electromagnetic relay K2;
This DC chopped-wave translation circuit comprises electric capacity C1 to electric capacity C5, field effect transistor Q1, diode D1 and inductance L; Electric capacity C1 is in parallel to electric capacity C3, the drain electrode of field effect transistor Q1 connects one end of electric capacity C1, also connect the first electromagnetic relay K1, the other end ground connection of electric capacity C1, the pwm signal end of the grid connection control circuit of field effect transistor Q1, the source electrode of field effect transistor Q1 connects the second electromagnetic relay K2 by inductance L, electric capacity C4 and electric capacity C5 is in parallel, one end of electric capacity C4 connects between inductance L and the second electromagnetic relay K2, the other end ground connection of electric capacity C4, the negative electrode of diode D1 connects the source electrode of field effect transistor Q1, the plus earth of diode D1.
Preferably, MPPT charge controller also comprises resistance R3 and resistance R4, and between the positive pole of one end connection storage battery of resistance R3 and the second electromagnetic relay K2, the other end of resistance R3 is by resistance R4 ground connection; First voltage detecting end of control circuit is connected between resistance R3 and resistance R4.
Preferably, MPPT charge controller also comprises resistance R1 and resistance R2, and between the positive output end of one end connection solar panel of resistance R1 and the first electromagnetic relay K1, the other end of resistance R1 is by resistance R2 ground connection; Second voltage detecting end of control circuit is connected between resistance R1 and resistance R2.
Preferably, MPPT charge controller also comprises resistance RR1, and the negative output terminal of solar panel is by resistance RR1 ground connection, and the second current detecting end of control circuit connects between solar panel and resistance RR1.
Preferably, MPPT charge controller also comprises temperature sensor and the buzzer of connection control circuit.
Preferably, MPPT charge controller also comprises LCDs and the keyboard scanning circuit of connection control circuit.
Preferably, MPPT charge controller also comprises real-time timepiece chip and the flash memory of connection control circuit.
Beneficial effect of the present invention at least comprise following some:
Above-mentioned MPPT charge controller adopts DC chopped-wave translation circuit, and the charging current by Real-time Collection storage battery regulates the optimal charge power of storage battery, be conducive to the utilance improving solar energy, and cost is low.Above-mentioned first electromagnetic relay K1 and the second electromagnetic relay K2 plays input polarity and input short protective effect.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of the better embodiment of MPPT charge controller of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described further:
Refer to 1, the present invention relates to a kind of MPPT charge controller, its better embodiment comprises DC chopped-wave translation circuit 10, first electromagnetic relay K1, the second electromagnetic relay K2, optical coupler, control circuit and sampling resistor RR2.
Solar panel is connected storage battery BAT by the first electromagnetic relay K1, DC chopped-wave translation circuit 10 with the second electromagnetic relay K2 successively, the negative pole of storage battery is by sampling resistor RR2 ground connection, and the first current detecting end of control circuit is connected between sampling resistor RR2 and storage battery.The control end of control circuit connects the first electromagnetic relay K1 and the second electromagnetic relay K2.
This DC chopped-wave translation circuit 10 comprises electric capacity C1 to electric capacity C5, field effect transistor Q1, diode D1 and inductance L.Electric capacity C1 is in parallel to electric capacity C3, the drain electrode of field effect transistor Q1 connects one end of electric capacity C1, also connect the first electromagnetic relay K1, the other end ground connection of electric capacity C1, the pwm signal end of the grid connection control circuit of field effect transistor Q1, the source electrode of field effect transistor Q1 connects the second electromagnetic relay K2 by inductance L, electric capacity C4 and electric capacity C5 is in parallel, one end of electric capacity C4 connects between inductance L and the second electromagnetic relay K2, the other end ground connection of electric capacity C4, the negative electrode of diode D1 connects the source electrode of field effect transistor Q1, the plus earth of diode D1.
The charging voltage that solar panel produces and electric current supply to charge a battery by DC chopped-wave translation circuit 10, charging current flows through sampling resistor RR2 and produces sampled voltage, control circuit sends PWM(Pulse Width Modulation based on MPPT algorithm by optical coupler according to sampled voltage, pulse width modulation) signal is to the field effect transistor Q1 of DC chopped-wave translation circuit 10, to regulate the output voltage of DC chopped-wave translation circuit 10, thus improve the charge efficiency of storage battery, improve the utilance of solar energy.Above-mentioned MPPT algorithm can be known by prior art, without the need to improving.
Above-mentioned MPPT charge controller adopts this DC chopped-wave translation circuit, and the charging current by real-time tracing storage battery regulates the optimal charge power of storage battery, be conducive to the utilance improving solar energy, and cost is low.Above-mentioned first electromagnetic relay K1 and the second electromagnetic relay K2 plays input polarity and input short protective effect.
MPPT charge controller also comprises resistance R3 and resistance R4, and between the positive pole of one end connection storage battery of resistance R3 and the second electromagnetic relay K2, the other end of resistance R3 is by resistance R4 ground connection.First voltage detecting end of control circuit is connected between resistance R3 and resistance R4, to detect the charging voltage of storage battery.
MPPT charge controller also comprises resistance R1 and resistance R2, and between the positive output end of one end connection solar panel of resistance R1 and the first electromagnetic relay K1, the other end of resistance R1 is by resistance R2 ground connection.Second voltage detecting end of control circuit is connected between resistance R1 and resistance R2, to detect the output voltage of solar panel.
MPPT charge controller also comprises resistance RR1, and the negative output terminal of solar panel is by resistance RR1 ground connection, and the second current detecting end of control circuit connects between solar panel and resistance RR1, to detect the output current of solar panel.
MPPT charge controller also comprises temperature sensor and the buzzer of connection control circuit, to realize excess temperature monitoring function.
MPPT charge controller also comprises LCDs and the keyboard scanning circuit of connection control circuit, to realize human-computer interaction function.
MPPT charge controller also comprises real-time timepiece chip and the flash memory of connection control circuit, to realize log recording function.
For a person skilled in the art, according to technical scheme described above and design, other various corresponding change and distortion can be made, and all these change and distortion all should belong within the protection range of the claims in the present invention.
Claims (7)
1. a MPPT charge controller, is characterized in that: it comprises DC chopped-wave translation circuit, the first electromagnetic relay, the second electromagnetic relay, optical coupler, control circuit and sampling resistor;
Solar panel is connected storage battery by the first electromagnetic relay K1, DC chopped-wave translation circuit with the second electromagnetic relay K2 successively, the negative pole of storage battery is by sampling resistor RR2 ground connection, and the first current detecting end of control circuit is connected between sampling resistor RR2 and storage battery; The control end of control circuit connects the first electromagnetic relay K1 and the second electromagnetic relay K2;
This DC chopped-wave translation circuit comprises electric capacity C1 to electric capacity C5, field effect transistor Q1, diode D1 and inductance L; Electric capacity C1 is in parallel to electric capacity C3, the drain electrode of field effect transistor Q1 connects one end of electric capacity C1, also connect the first electromagnetic relay K1, the other end ground connection of electric capacity C1, the pwm signal end of the grid connection control circuit of field effect transistor Q1, the source electrode of field effect transistor Q1 connects the second electromagnetic relay K2 by inductance L, electric capacity C4 and electric capacity C5 is in parallel, one end of electric capacity C4 connects between inductance L and the second electromagnetic relay K2, the other end ground connection of electric capacity C4, the negative electrode of diode D1 connects the source electrode of field effect transistor Q1, the plus earth of diode D1.
2. MPPT charge controller as claimed in claim 1, it is characterized in that: MPPT charge controller also comprises resistance R3 and resistance R4, between the positive pole of one end connection storage battery of resistance R3 and the second electromagnetic relay K2, the other end of resistance R3 is by resistance R4 ground connection; First voltage detecting end of control circuit is connected between resistance R3 and resistance R4.
3. MPPT charge controller as claimed in claim 1, it is characterized in that: MPPT charge controller also comprises resistance R1 and resistance R2, between the positive output end of one end connection solar panel of resistance R1 and the first electromagnetic relay K1, the other end of resistance R1 is by resistance R2 ground connection; Second voltage detecting end of control circuit is connected between resistance R1 and resistance R2.
4. MPPT charge controller as claimed in claim 1, it is characterized in that: MPPT charge controller also comprises resistance RR1, the negative output terminal of solar panel is by resistance RR1 ground connection, and the second current detecting end of control circuit connects between solar panel and resistance RR1.
5. MPPT charge controller as claimed in claim 1, is characterized in that: MPPT charge controller also comprises temperature sensor and the buzzer of connection control circuit.
6. MPPT charge controller as claimed in claim 1, is characterized in that: MPPT charge controller also comprises LCDs and the keyboard scanning circuit of connection control circuit.
7. MPPT charge controller as claimed in claim 1, is characterized in that: MPPT charge controller also comprises real-time timepiece chip and the flash memory of connection control circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420665561.9U CN204145035U (en) | 2014-11-10 | 2014-11-10 | Novel low-cost MPPT charge controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420665561.9U CN204145035U (en) | 2014-11-10 | 2014-11-10 | Novel low-cost MPPT charge controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108123533A (en) * | 2016-11-30 | 2018-06-05 | 镇江石鼓文智能化系统开发有限公司 | A kind of solar charging controller system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108123533A (en) * | 2016-11-30 | 2018-06-05 | 镇江石鼓文智能化系统开发有限公司 | A kind of solar charging controller system |
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