In this project a multi-input interleaved DC-DC converter with low current ripple is proposed. In this project we are using solar and transformer as multi-inputs to the interleaved DC-DC converter. In this project we are using solar energy into the rechargeable battery through charging circuit as well as step down transformer which can converts 230VAC to 12VAC and this 12AC coverts into 12V DC is uses to charging the battery. This battery power is fed as input to the interleaved DC-DC converter. Arduino will generate the PWM signals in buck and boost modes depending on the load selected by the user. Interleaved closed loop DC-DC converter will adjust the voltage either in buck (24v to 12v) or boost (12v to 24v) mode. The circuits consist of DC source, inductors, MOSFETS, capacitors and resistors. The converter operates in two modes. In this we are using interleaved Buck Boost Converter which converts variable DC voltage to required DC voltage. Buck-Boost converter is used to get DC output voltage greater than input voltage or lesser than the input voltage. Closed loop control is a process by which the output voltage is stabilized by obtaining the feedback of the loop. In this to gain constant output DC voltage, closed loop control is required. Closed loop control of Buck Boost Converter is used to obtain a constant DC output voltage. The switching frequency and duty cycle decides the output voltage. In the closed loop process the output voltage is compared with a set voltage and the error value is reduced by controlling the switching pulse. Based on input voltages arduino will generate the PWM signals to the mosfets for buck –bust operations. This project consists of two DC loads by using selection switch user can operate the loads. Arduino will continuously read the input voltages of solar, battery and interleaved converter will be display on LCD module. In this we are using two DC motors which is operated with 12V,24V DC as a load. To achieve this task microcontroller loaded program written in embedded C language.

       

The main features of the project:

1. Using multiple inputs.
2. Using solar renewable energy from sun.
3. Design an interleaved DC-DC converter.
4. Monitoring solar, battery and interleaved converter output voltages on LCD display.
5. Selection switch-based Buck and Boost of operating system.
6. Using arduino UNO to achieve this task.

The major building blocks of this project are:

1. Solar panel.
2. Battery.
3. Transformer.
4. Interleaved DC-DC converter.
5. Selection switch.
6. Arduino uno.
7. Regulated power supply.
8. LCD display.
9. Voltage Sensors.
10. Charging circuits.

Software’s used:

1. Arduino IDE for dump the code into the microcontroller.
2. Embedded C language.
3. Express SCH for Circuit Design.

     

   

Block Diagram:  

 

   

 

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