CN204272444U - Bidirectional up-down pressure solar LED street lamp controller - Google Patents

Abstract

The utility model relates to a kind of Bidirectional up-down pressure solar LED street lamp controller, comprise photovoltaic panel, LED, storage battery, Bidirectional up-down volt circuit, field effect transistor drive circuit, PIC single chip microcomputer, it is characterized in that: photovoltaic panel, LED connect into loop by Bidirectional up-down volt circuit and storage battery; The input AD sampling end of PIC single chip microcomputer connects the output of photovoltaic panel, the output AD sampling end of PIC single chip microcomputer connects the output of LED, the PWM of PIC single chip microcomputer holds connection control field effect transistor drive circuit, and field effect transistor drive circuit drives each field effect transistor in Bidirectional up-down volt circuit.The utility model main feature is that maximum power charging circuit and constant current driver circuit for LED share a loop of power circuit, solar recharging and LED constant current is utilized to drive working hour differently to carry out different control strategies, realize maximal power tracing (MPPT) charging and LED constant current driving function, in the same circuit, realize the two-way flow of energy.

Description

Bidirectional up-down pressure solar LED street lamp controller

Technical field

The utility model relates to a kind of solar LED street lamp controller, and being specially adapted to photovoltaic panel boosting is the solar street lamp controller that charge in batteries and pressure storage battery step-down constant current supply LED are powered.

Background technology

With the key component that LED driving solar street lamp controller is in independent solar LED street lamp system, its effect photovoltaic panel electric energy is carried out maximal power tracing (MPPT) for charging a battery and storage battery electric energy being carried out constant-current driving LED light source.

Existing band LED drives solar street lamp controller generally to comprise two loops: first loop is maximal power tracing (MPPT) charging circuit, general use BUCK buck configuration or BOOST boost configuration; Second servo loop is constant-current discharge circuit, general use BUCK buck configuration or BOOST boost configuration.

Above-mentioned band constant current drives street lamp to use more components and parts to realize Street lamps control function, needs circuit more to simplify.

Summary of the invention

The purpose of this utility model provides a kind of Bidirectional up-down to press solar LED street lamp controller, the utility model and traditional band LED drive that solar street lamp controller is different to be: maximum power charging circuit and constant current driver circuit for LED share a loop of power circuit, solar recharging and LED constant current is utilized to drive working hour differently to carry out different control strategies, realize maximal power tracing (MPPT) charging and LED constant current driving function, in the same circuit, realize the two-way flow of energy.

Bidirectional up-down pressure solar LED street lamp controller, comprise photovoltaic panel, LED, storage battery, Bidirectional up-down volt circuit, field effect transistor drive circuit, PIC single chip microcomputer, it is characterized in that: photovoltaic panel, LED connect into loop by Bidirectional up-down volt circuit and storage battery; The input AD sampling end of PIC single chip microcomputer connects the output of photovoltaic panel, the output AD sampling end of PIC single chip microcomputer connects the output of LED, the PWM of PIC single chip microcomputer holds connection control field effect transistor drive circuit, and field effect transistor drive circuit drives each field effect transistor in Bidirectional up-down volt circuit;

Described Bidirectional up-down volt circuit, by the first field effect transistor Q1, second field effect transistor Q2, 3rd field effect transistor Q3, first electric capacity C1, second electric capacity C2, an inductance L 1 and the first diode D1, second diode D2, 3rd diode D3 forms, first diode D1 positive pole is connected with photovoltaic panel positive pole, first diode D1 negative pole and the first electric capacity C1 positive pole, LED positive pole, one end of inductance L 1 connects, the other end of inductance L 1 respectively with the source electrode of the second field effect transistor Q2, the drain electrode of the 3rd field effect transistor Q3, second diode D2 negative pole, the positive pole of the 3rd diode D3 connects, the source electrode of the 3rd field effect transistor Q3 respectively with the negative pole of the 3rd diode D3, second electric capacity C2 positive pole, battery positive voltage connects, the negative pole of photovoltaic panel respectively with the first electric capacity C1 negative pole, second electric capacity C2 negative pole, battery terminal negative, first field effect transistor Q1 drain electrode, second field effect transistor Q2 drain electrode, 3rd diode D3 positive pole connects, the negative pole of LED is connected with the first field effect transistor Q1 source electrode.

Described PIC single chip microcomputer comprises PWM circuit for generating and AD sample circuit, and PWM circuit for generating Main Function provides signal to field effect transistor drive circuit, and AD sample circuit is mainly sampled the electric current and voltage data in the input and output loop of Bidirectional up-down volt circuit.PWM circuit for generating and AD sample circuit are available circuit.

What described field effect transistor drive circuit was selected is high frequency transformer isolation drive, and pwm signal PIC single chip microcomputer produced drives the field effect transistor of electric discharge supply Bidirectional up-down volt circuit to power.

The utility model adopts Bidirectional up-down volt circuit to realize maximum power charging circuit and constant current driver circuit for LED shares a loop of power circuit, solar recharging and LED constant current is utilized to drive working hour differently to carry out different control strategies, realize maximal power tracing (MPPT) charging and LED constant current driving function, the two-way flow of energy is realized in the same circuit, the circuit structure of great simplification, reduces component number and reduces controller cost.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Embodiment

The utility model will be further described by reference to the accompanying drawings.

As shown in Figure 1, Bidirectional up-down pressure solar LED street lamp controller, comprise photovoltaic panel, LED, storage battery, Bidirectional up-down volt circuit, field effect transistor drive circuit, PIC single chip microcomputer, it is characterized in that: photovoltaic panel, LED connect into loop by Bidirectional up-down volt circuit and storage battery; The input AD sampling end of PIC single chip microcomputer connects the output of photovoltaic panel, the output AD sampling end of PIC single chip microcomputer connects the output of LED, the PWM of PIC single chip microcomputer holds connection control field effect transistor drive circuit, and field effect transistor drive circuit drives each field effect transistor in Bidirectional up-down volt circuit;

Described Bidirectional up-down volt circuit, by the first field effect transistor Q1, second field effect transistor Q2, 3rd field effect transistor Q3, first electric capacity C1, second electric capacity C2, an inductance L 1 and the first diode D1, second diode D2, 3rd diode D3 forms, first diode D1 positive pole is connected with photovoltaic panel positive pole, first diode D1 negative pole and the first electric capacity C1 positive pole, LED positive pole, one end of inductance L 1 connects, the other end of inductance L 1 respectively with the source electrode of the second field effect transistor Q2, the drain electrode of the 3rd field effect transistor Q3, second diode D2 negative pole, the positive pole of the 3rd diode D3 connects, the source electrode of the 3rd field effect transistor Q3 respectively with the negative pole of the 3rd diode D3, second electric capacity C2 positive pole, battery positive voltage connects, the negative pole of photovoltaic panel respectively with the first electric capacity C1 negative pole, second electric capacity C2 negative pole, battery terminal negative, first field effect transistor Q1 drain electrode, second field effect transistor Q2 drain electrode, 3rd diode D3 positive pole connects, the negative pole of LED is connected with the first field effect transistor Q1 source electrode.

Wherein Bidirectional up-down volt circuit major function is that photovoltaic panel voltage is promoted to charge in batteries and storage battery step-down constant current supply LED is powered.

When photovoltaic panel charges a battery, the first field effect transistor Q1, the 3rd field effect transistor Q3 close, PIC single chip microcomputer provides PWM drive singal to the second field effect transistor Q2, Bidirectional up-down volt circuit is equivalent to a boost booster circuit, to realize MPPT maximal power tracing charge function.

The first field effect transistor Q1 conducting when battery discharging, the second field effect transistor Q2 close, and PIC single chip microcomputer provides PWM drive singal to the 3rd field effect transistor Q3, and discharge loop is equivalent to a BUCK reduction voltage circuit, drive function to realize LED step-down constant current.

Described PIC single chip microcomputer comprises PWM circuit for generating and AD sample circuit, and PWM circuit for generating Main Function provides signal to field effect transistor drive circuit, and AD sample circuit is mainly sampled the electric current and voltage data in the input and output loop of Bidirectional up-down volt circuit.PWM circuit for generating and AD sample circuit are available circuit.

What described field effect transistor drive circuit was selected is high frequency transformer isolation drive, and pwm signal PIC single chip microcomputer produced drives the field effect transistor in electric discharge supply Bidirectional up-down volt circuit to power.

The utility model adopts Bidirectional up-down volt circuit to realize maximum power charging circuit and constant current driver circuit for LED shares a loop of power circuit, solar recharging and LED constant current is utilized to drive working hour differently to carry out different control strategies, realize maximal power tracing (MPPT) charging and LED constant current driving function, the two-way flow of energy is realized in the same circuit, the circuit structure of great simplification, reduces component number and reduces controller cost.

Claims (1)

1. Bidirectional up-down pressure solar LED street lamp controller, comprise photovoltaic panel, LED, storage battery, Bidirectional up-down volt circuit, field effect transistor drive circuit, PIC single chip microcomputer, it is characterized in that: photovoltaic panel, LED connect into loop by Bidirectional up-down volt circuit and storage battery; The input AD sampling end of PIC single chip microcomputer connects the output of photovoltaic panel, the output AD sampling end of PIC single chip microcomputer connects the output of LED, the PWM of PIC single chip microcomputer holds connection control field effect transistor drive circuit, and field effect transistor drive circuit drives each field effect transistor in Bidirectional up-down volt circuit;

Described Bidirectional up-down volt circuit, by the first field effect transistor Q1, second field effect transistor Q2, 3rd field effect transistor Q3, first electric capacity C1, second electric capacity C2, an inductance L 1 and the first diode D1, second diode D2, 3rd diode D3 forms, first diode D1 positive pole is connected with photovoltaic panel positive pole, first diode D1 negative pole and the first electric capacity C1 positive pole, LED positive pole, one end of inductance L 1 connects, the other end of inductance L 1 respectively with the source electrode of the second field effect transistor Q2, the drain electrode of the 3rd field effect transistor Q3, second diode D2 negative pole, the positive pole of the 3rd diode D3 connects, the source electrode of the 3rd field effect transistor Q3 respectively with the negative pole of the 3rd diode D3, second electric capacity C2 positive pole, battery positive voltage connects, the negative pole of photovoltaic panel respectively with the first electric capacity C1 negative pole, second electric capacity C2 negative pole, battery terminal negative, first field effect transistor Q1 drain electrode, second field effect transistor Q2 drain electrode, 3rd diode D3 positive pole connects, the negative pole of LED is connected with the first field effect transistor Q1 source electrode.