Soft Switched DC DC Converter With Multiple Inputs
For many of years, switching systems through converters have been disturbing the electric power supply systems (renewable energy, telecommunication and electric vehicles). Although , renewable energy is getting attention worldwide due to environment issues like greenhouse gasses and environmen
2025-06-28 16:36:00 - Adil Khan
Soft Switched DC DC Converter With Multiple Inputs
Project Area of Specialization Electrical/Electronic EngineeringProject SummaryFor many of years, switching systems through converters have been disturbing the electric power supply systems (renewable energy, telecommunication and electric vehicles). Although , renewable energy is getting attention worldwide due to environment issues like greenhouse gasses and environment temperature issues, so that converter should also be accelerated along with.
Among the dc dc converter, the low voltage gain , low efficiency , large size , high ripple current , less power conversion capacity , large numbers of switches and large number of electronic equipment are the major technical issues. Among these switching losses are more likely present into these converter systems. Some previous soft switching dc dc converters still have excellent features but some technical problems still need to be resolved, like significant power losses in the auxiliary circuits inevitably appear. The beauty of electronics is in the versatility of electronic equipment. By the way, using of proper equipment and reducing the cardinality of switches will lead to solve these problems.
By considering these issues, the key purpose for designing and modeling an efficient power converter is to enhance the overall capacity and efficiency of converter through suitable circuitry for diversifying dc inputs like solar, fuel cell and batteries. That can be done by either changing the operation technology or by changing the equipment properties. Such an efficient converter will be used to increase the efficiency of whole system.
The suitable method to carry out this research is by using the MATLAB/ Simulink. Through which we can analyze and upgrade the models as per our requirement and choose the suitable model for the advanced and efficient soft switching converter. After all make the prototype and compare the results.
Project ObjectivesThe research project work aims to develop understanding of the factors and loss reduction techniques for the soft switching converters through the real time based simulation and comparison of results with prototype.
The General objective:
The modeling and designing the advanced types of soft switching dc dc converter.
The specific objectives:
- To reduce the switching losses.
- To increase the efficiency.
- To increase the power conversion capacity.
- To reduce the high ripple current.
- To increase the low voltage gain.
The project implementation can be summarised as follow:
- Step # 1: Properly designing the prototype of soft switched dc dc converter and making sure all the connections are as par diagram.
- Step # 2: Connect the 48 volts solar panel and 12 volts battery, as a dc source with soft switched converter.
- Step # 3: Attach the motor and lamp as a dc loads to this converter.
- Step # 4: Get the waveform and measurement through oscilloscope and meters.
- Step # 5: Analyze the switching waveforms across the switches, inductors, capacitors and loads. After all compare between the simulation and real time prototype.
- Step # 6: Make all the circuit connection permanent. Design the proper look for project.
Regarding the technical advantages of the project, the first and foremost benefit is that the soft switched dc dc converter will provide simplicity in design, lesser cost, lower number of switches and reduce noise. Along with this it also gives fast response to the transient.
In many industrial applications, the multiple-input dc–dc converter is useful to combine several input power sources whose voltage levels and/or power capacity are different and to get regulated output voltage for the load from them it is required to convert a fixed voltage DC source into variable voltage DC source. A DC DC converter can be considered as DC equivalent to an AC transformer with a continuously variable turns ratio. Like a transformer, it can be used to step-down or step-up a DC voltage source
Generally it can be used in solar grids, automobiles, stepping up the batteries, Pulse creation, laptop adaptor, domestic appliances or even in small machines it is also very beneficial for switching mode regulators to convert a DC voltage, normally unregulated, to a regulated DC output voltage. The regulation is normally achieved by PWM at fixed frequency and the switching device can be normally BJT, MOSFET and IGBT.
On the bottom line, its necessarily required to match the DC power requirements of load by different sources .
Technical Details of Final DeliverableThe Final Project will reduce the switching losses by making the zero voltage switching ZVS and zero current switching ZCS through the resonance tropology. Inductor ,used in the converter, provides the continuous conduction mode (CCM) to supply the smooth power..This proposed work will play pivotal role in renewable energy and sustainable development. Implementation of this project will be efficient and economical.
Final protype of designed converter will contain mosfet circuitry arrangement along with microcontroller mounted on PCB.
Final Deliverable of the Project HW/SW integrated systemCore Industry Energy Other Industries Others Core Technology OthersOther Technologies Clean TechSustainable Development Goals Affordable and Clean Energy, Industry, Innovation and InfrastructureRequired Resources| Item Name | Type | No. of Units | Per Unit Cost (in Rs) | Total (in Rs) |
|---|---|---|---|---|
| Total in (Rs) | 62170 | |||
| Photo copes, printouts and thesis book | Miscellaneous | 400 | 7 | 2800 |
| Stationary and designing materials for display | Miscellaneous | 2000 | 1 | 2000 |
| Transportation and visits expenditures. | Miscellaneous | 3 | 1300 | 3900 |
| Capacitor | Equipment | 12 | 200 | 2400 |
| Inductors | Equipment | 12 | 350 | 4200 |
| Power Diodes | Equipment | 11 | 390 | 4290 |
| Aurdino Due | Equipment | 1 | 2500 | 2500 |
| connectors | Equipment | 30 | 10 | 300 |
| Mosfets | Equipment | 10 | 350 | 3500 |
| Batteries as source | Equipment | 1 | 8000 | 8000 |
| solar panel 48 volts as source | Equipment | 1 | 25080 | 25080 |
| Dc Motor as Load | Equipment | 1 | 3200 | 3200 |