Switched-Mode Power Supply for high input voltage at Converdan A/S

Do you know how many skills that is needed to make a Switched-Mode Power Supply? Are you interested in analytical modelling of power electronics, safety, magnetics design, analog or digital regulation design, simulation models, EMC or electronics in general?

Then this is a great opportunity to combine all of what you have learned.

Switched-Mode Power Supplies is in nowadays the only way to convert voltage from one level to another. There exists many Power Supplies in the industry that is not design for the purpose where it is used. This project is a great opportunity to understand what it takes to make a Switched-Mode Power Supply by constructing an analytical- & simulation- & prototype-model and matching them. A power supply is an impressive and complex piece of engineering where it is a compromise of every decision you make, every choice interact with the previous choice.

This SMPS is normally supplied by a high DC voltage of 1kV, but under startup it needs to be supplied by a second input AC input voltage of 480Vrms.

Following research needs to be covered in order to understand a SMPS:

  • Selection of proper topology
  • Modeling of power supply in order to make a simulation model.
  • Magnetic design of transformer & inductors.
    • Core - Eddy currents, hysteresis, saturation
    • Winding – Proximity, fringing and conduction.
    • Parasitic capacitive coupling
    • Magnetization inductance
    • Leakage inductance
  • Selection of components – Account for the different construction types of a component.
  • Efficiency analysis
  • Temperature impact analysis
  • Regulation (Analog or Digital)
    • Gain & Phase investigation
    • Input impedance
    • Output impedance
    • Startup investigation – large signal model.
  • EMI filter
    • Interaction with the regulation of the Regulation
    • Interaction with the source
  • EMC (if the project time allows it)
    • Conducted immunity & emission
    • Radiated immunity & emission

The requirements for the Switched-Mode Power Supply are as follows:

  • Input voltage range 400-1200 Vdc
  • Startup on mains supply (without PFC) 300-500 Vac.
  • Output voltage 24 Vdc
  • Output power 20W
  • EMI filter included for residential limits
  • Efficiency 95%
  • Regulation - Gain & Phase margin of 12 dB and 60°
  • Dynamic Output Impedance <200mR

Converdan - we are experts in Power Electronics

We have more than 10 years of experience in developing customized products for our customers, based on our uniquely developed and refined technology platforms. These Converdan technology platforms are the building blocks for our platform based product development.
Integrated into our platforms are strategically selected components, optimized manufacturing processes and capabilities. Add to this extensive power electronics know-how, the use of best practices and field proven designs.

We have a team of focused and passionate power electronics professionals who all have our customers needs at heart. Furthermore Converdan has very well equipped development, test and manufacturing facilities.

See more about Converdan on www.converdan.com

If you have questions regarding the project, kindly contact Søren Juul on email: sj@converdan.com

Send your application on job@converdan.com


Attention: Often you need a pre-approval from your university or study counselor, to ensure that projects or thesis found on DTU Job Bank will be accepted as part of your education. Please contact the right entity in due time to ensure that you're picking the right project.