Title
Design and Prototyping of a DC Power Supply Based on Inductive Power Transfer
Author
Manur, Suraj (TU Delft Electrical Engineering, Mathematics and Computer Science)
Contributor
Ghaffarian Niasar, M. (mentor) 
Vaessen, P.T.M. (graduation committee)
Qin, Z. (graduation committee)
Degree granting institution
Delft University of Technology
Programme
Electrical Engineering | Electrical Power Engineering
Date
2023-08-04
Abstract
The integration of renewable energy systems into the grid brings new and unique propositions involving the integration of power electronic inverter based solutions into the High Voltage (HV) grid. Thus a need arises to test the HV components with unconventional waveforms which can be satisfied by the Arbitrary Waveshape Generator (AWG). Two such topologies have been shortlisted for the AWG, ie: Modular Multilevel Converter (MMC) & Cascaded H Bridge (CHB). The MMC requires a single insulated DC source while the CHB requires multiple insulated DC sources with isolation.
Developing insulated DC sources using traditional transformers requires oil, epoxy or other complex insulation materials. The insulation requirements are further exacerbated when HV > 5 kV is required at power levels greater than 1 kW. For this reason, Wireless Power Transfer methods are studied in this thesis to develop a DC Power Supply based on Inductive Power Transfer (IPT). The developed supply is capable of conducting DC breakdown tests and high frequency (>100 kHz) AC discharge tests on dielectrics.
The key requirements for developing such a system are Load Invariant Voltage, High Voltage Gain and Soft Switching. Considering these requirements the Series Parallel (S-P) topology is chosen to deliver 1.5 kW at a DC voltage of 5 kV from a 350 V input, with a diode rectifier. Using the Greinacher rectifier, 10 kV DC output is obtained. Different parameters of the developed resonant converter such as coupling coefficient, switching frequency, deadtime and overcurrent protection are analysed to find a suitable configuration for the DC Power Supply. An efficiency of 88% at rated load and load regulation of 18% is achieved for the developed power supply.
For the CHB, a multi-receiver IPT system is desirable to provide multiple isolated DC outputs. A 2-receiver and a 3-receiver IPT system is constructed and their coupling behaviour is studied. A conclusion is drawn that an ”n” receiver system has a coupling coefficient 𝑘𝑛 = √𝑛𝑘1 and accordingly a S-P IPT system can be developed to obtain multiple (n) isolated DC voltage sources.
Subject
Inductive power transfer
Series Parallel Topology
High Voltage Gain
Load Invariant Voltage
Power supply
To reference this document use:
http://resolver.tudelft.nl/uuid:7629e14c-be84-4de2-a105-3ecf52c2a4f1
Embargo date
2025-07-31
Part of collection
Student theses
Document type
master thesis
Rights
© 2023 Suraj Manur