Abstract
The three port series resonant converter (3pSRC) is a promising topology especially for grid applications and onboard chargers. It offers galvanic isolation, high efficiency and enables a power dense design via the common multiport transformer structure. Typically, power flow is controlled by means of the switching frequency and/or the relative phase between the excitation of each transformer port. However a unique solution for the optimal combination of control variables for any unique set of port voltages and powers is non trivial. This paper proposes a control loop for naturally approximating such optimal control variables. The mathematical model used for calculating the power flow between the three ports is presented and a method for finding the switching frequency that best balances zero-voltage-switching (ZVS) and high efficiency for a given operation point is given. The control approach is demonstrated with a Silicon Carbide (SiC) based prototype for an on-board charger application.
| Original language | German (Austria) |
|---|---|
| Title of host publication | 2021 IEEE 22nd Workshop on Control and Modelling of Power Electronics (COMPEL) |
| Pages | 1-7 |
| Number of pages | 7 |
| DOIs | |
| Publication status | Published - 5 Nov 2021 |