High Power Factor Converter Control by Instantaneous Single-phase Current for a Maglev System Linear Generator

Abstract

A linear generator, which utilizes the harmonic magnetic field by ground coils, has been developed as an on-board power source for the Maglev system. The linear generator is composed of generator coils, which are in the state of three-phase unbalance, and a PWM converter, which can compensate for the reactive power by detecting instantaneous currents. This paper proposes an improved instantaneous current control, which utilizes only each single-phase current to compensate unbalanced three-phase reactive powers. We analyze the characteristics of this control and verify its performance by numerical simulation and bench tests.