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access icon free High-voltage pulse transformer for IOT modulators

© The Institution of Engineering and Technology
Received 18/10/2019, Accepted 05/08/2020, Revised 26/02/2020, Published 12/08/2020

Neutron sources like European Spallation Source consist of linear proton accelerator and beam target. The linear accelerator is supplied by inductive output tubes (IOTs) or klystrons that require high-voltage DC supply (40 kV). This study describes the design and experimental evaluation of high-voltage dry-isolation pulse transformer design evaluation prototype for interleaved IOT supply modules. In order to withstand high-voltage stress, a modular secondary winding module with multistage voltage field equalisation are designed. Inter-winding connections are realised in the air as the separate winding outputs are routed together through common high-voltage isolators. The novelties of the current manuscript are new pulse transformer design and the experimental work. Experiments with full-scale prototype verified the advantages and revealed, also, some drawbacks of this construction. Proposed transformer design could be used not only in IOT or klystron power supplies but also in high-voltage DC/DC or AC/AC converters and power electronic transformers, used in the medium-voltage distribution grids.

Inspec keywords: power supplies to apparatus; transformer windings; DC-DC power convertors; neutron sources; proton accelerators; pulse transformers; power electronics; linear accelerators; klystrons; power transformers; AC-AC power convertors

Other keywords: high-voltage isolators; klystrons; multistage voltage field equalisation; medium-voltage distribution grids; high-voltage dry-isolation pulse transformer design evaluation prototype; IOT modulators; linear proton accelerator; klystron power supplies; neutron sources; high-voltage stress; interleaved IOT supply modules; power electronic transformers; voltage 40.0 kV; inter-winding connections; experimental evaluation; high-voltage DC supply; modular secondary winding module; European Spallation Source; high-voltage pulse transformer; linear accelerator; separate winding outputs; beam target

Subjects: Microwave tubes; DC-DC power convertors; Transformers and reactors; Power electronics, supply and supervisory circuits; Neutron sources; Control of electric power systems; Power convertors and power supplies to apparatus; AC-AC power convertors; Linear accelerators

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