Abstract

MORA, Jaime; VARGAS, Iván  and  ASENJO, José. Design of switched power supply for the SCR-1 Stellerator. Tecnología en Marcha [online]. 2017, vol.30, suppl.1, pp.21-29. ISSN 0379-3982.  http://dx.doi.org/10.18845/tm.v30i5.3220.

The stellarator of Costa Rica 1 (SCR-1) is a magnetic confinement device for high temperature plasma, designed, built and in implementation in the Costa Rica Institute of Technology. During operation, the plasma will be confined by the magnetic field (~43,8 mT) of 12 coils with six loops of copper wire AWG #4, and fed by a battery bank (150 Ah, 120 V) that should provide a constant current of 767,8 A for a period of 4 s to 10 s. The change of electric resistance made by the ohmic heating in the wire required to design, build and implement a current regulator that would supply a constant current of 767,8 A during the indicated period. This article presents the design of an electric circuit, powerful and low-cost, to regulate the electric current in the modular coils of the SCR-1. Additionally, it describes the design of the digital control of the electric circuit PID, with a velocity algorithm that decreases the magnitude of the harmonics to avoid issues within the magnetic field of the stellarator.

Keywords : Magnetic confinement; stellarator; current regulator; power electronics.

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