First tests on power supplies for DTT in-vessel coils
The first components of the power supplies for the DTT in-vessel coils were manufactured and tested.
DTT is equipped with a system of 27 Non-Axisymmetric (NAS) In-Vessel Coils for the correction of the error fields and the suppression of the Edge Localized Modes (aka ELMs: these are energetic bursts of energy and particles that escape from the magnetic field surrounding the plasma and cause a loss of energy). Each coil can be independently controlled by a system of power supplies.
The contract for the procurement of these power supplies has been awarded to the company Equipaggiamenti Elettronici Industriali (EEI), located in Vicenza, Italy. The procurement is financed by the PNRR grant assigned to ENEA for the DTT-Upgrade project.
The power supply system receives all its power from the 20 kV grid through a customized 3-windings transformer. All the acceptance tests on this transformer were successfully performed in the factory of the manufacturer GBE with the attendance of the EEI and DTT and EEI staff.
The first unit of the 27 inverters supplying the NAS coils was manufactured in the EEI premises and is currently under test with a resistive-inductive dummy load, specifically designed to reproduce the behavior of the coils.
After the preliminary tests, the entire system will be assembled in EEI to undergo complete acceptance tests. Afterwards, the delivery of the system to the DTT site is expected by October 2025.
The DTT 27 Non-Axisymmetric (NAS) In-Vessel Coils.
