A Bidirectional Series-Resonant Converter With PWM Control And Load-Independent Voltage-Gain Characteristics

Project Title

A Bidirectional Series-Resonant Converter With PWM Control And Load-Independent Voltage-Gain Characteristics

Project Area of Specialization Wearables and ImplantableProject Summary

Bidirectional  series resonant (BSR) converter and its control stratedies have been developed Theoretical analysis and experimental results indicate that key features of the BSR converterare as follow:

1. ) Bidirectional voltage andpower flow regulation with a fixed frequency PWM control strategy, which makes the implementation and control of the BSR converter easily.
2. ) The normalizedvoltage  gain is only determined by the effective duty cycles of the primary and secondary switches and nothing to do with the amplitude and direction of the transferred power.
3. )Buck and Boost voltage conversion capabilities in both fowared and backward modes..which makes the  proposed converter  a promising candidate  for  bidirectional power conversion aplications with widevoltagerange,e.g. battery or super-capacitor energy storage systems in DC microgrids.
4. )Smooth and automatic mode transition has been achieved easily because of the simple control and unique voltage gain characteristics of the simple control and unique voltage gain characteristicsof the proposed BSR converter.
5. )Zero-voltage-switching of all the active switches within the entire voltage and load ranges with the help of an auxiliary inductor.The circulating energy for soft-switching is low because the converter always operates at the series resonant frequency.

Project Objectives

1)To implement a dual active bridge bidirectional series DC to DC converter in closed loop featuring zero voltage switching.

2)How to achieve high efficency, high power density by using bidirectional DC-DC power conversion in a wide voltage range for DC microgrid.

Project Implementation Method

Our project consists of two parts

1. Software

• Arduino
• proteous

       2.Hardware

• Arduino
• IGBTS
• PWM controller
• Power Capacitor
• Buck Converter
• Boost Converter
• Power Supply
•  

Benefits of the Project

1. Saving the domestic electrical energy consumed by the DC gadgets in thousands of AC to DC conversions by just doing one conversion in DC micro grid system.
2. The Bidirectional DC to DC converter can be used on HVDC level because bidirectional gain independent converters promise a feasible and reliable solution for energy conservation and sharing.
3. This project can be marketed in future when DC microgrid will be a part of distribution system due to the quality of bidrectional power flow ,this project can be used for power exchange between two countries on HVDC lines.

Technical Details of Final Deliverable

 First the power is transferring from primary side tothe secondary side of the converter showing the forward mode of operationan then the power is transferring from secondary side to primary sideof the converter showing the backword mode of operation.The waveform in the forward as well as in the backward mode are exactly the same due to symmetrical operationand the symmetry of the circuit. the only difference is the direction of the waveform of current through resonant inductor and in the waveform of voltage through resonant capacitor.A series LC tank is connectedd between the two sides of the bidirectional series resonant converter to resonant at the resonant frequency of the LC resonant tank.We use Arduino as a controller.

Final Deliverable of the Project HW/SW integrated systemType of Industry Energy Technologies Wearables and ImplantablesSustainable Development Goals Affordable and Clean EnergyRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	65590
IGBTS	Equipment	17	350	5950
Heat Sink	Equipment	10	50	500
DC Capacitor	Equipment	2	500	1000
Arduino	Equipment	2	1400	2800
Optocoupler	Equipment	22	160	3520
Buttons	Equipment	10	30	300
Buck Converter	Equipment	4	300	1200
Boost Converter	Equipment	2	400	800
Ac capacitor	Equipment	13	250	3250
Inductor	Equipment	2	1000	2000
Power supply(24V)	Equipment	1	6000	6000
Power supply(12V)	Equipment	1	4000	4000
Potentio meter	Equipment	2	8000	16000
Bulb	Equipment	6	75	450
PCB	Equipment	6	2500	15000
wires	Equipment	30	34	1020
Bottom board	Equipment	1	1000	1000
PWM	Equipment	400	2	800
Miscellianrous	Miscellaneous	0	0	0