Thyristor Validation and Testing of 5kA/500V Rectifier Stack for Magnetic Confinement Application in Fusion machines
High Current Power Supplies (HCPS) fed to inductive coils are used for magnetic confinement of the hot plasma in fusion machines, such as ITER in southern France. The output current of the HCPS typically ranges from few kA up to 70kA, and employs thyristors and IGBTs as an elementary switching device. The press-pack (capsule) thyristor modules are commonly used in multi-pulse converters and has demonstrated very high reliability. 5kA/500V rectifier stack based on 3 Phase, full wave, full controlled thyristor bridge has been developed utilizing two thyristors in parallel in each arm. The DSP controller is used for implementing the control and protection functions. This paper presents the validation tests conducted on the selected high current press-pack thyristors along with test results of 5kA/500V Rectifier Stack on RL dummy load. The lessons from initial synchronous operation of Rectifier Stack (on RL load) during Aditya-U plasma pulse are also presented.
Authors
- H. Dhola (ORCID: https://orcid.org/0000-0001-8515-4129)
- Rohit Kumar (ORCID: https://orcid.org/0000-0002-0809-8626)
- Joydeep Ghosh (ORCID: https://orcid.org/0000-0002-4369-1900)
- Dishang Upadhyay (ORCID: https://orcid.org/0009-0009-4317-4426)
- U.K. Baruah (ORCID: https://orcid.org/0009-0000-6707-9110)
- P.R. Parmar (ORCID: https://orcid.org/0000-0003-4292-7923)
- Namita Singh (ORCID: https://orcid.org/0000-0002-6782-4288)
- Supriya A. Nair (ORCID: https://orcid.org/0009-0004-1367-6509)
- Rasesh Dave
- Motibhai Makwana
- Sandip Gajjar
- Darshan Parmar
- Niranjanpuri Goswami
- Kush Mehta
- Aruna Thakar
Institutions
- Institute for Plasma Research (IN)
- Ahmedabad University (IN)
Publication Details
- Published
- 2025-06-18
- DOI
- https://doi.org/10.1109/pectea61788.2025.11076237
- Primary Topic
- Superconducting Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00