Seung-Ki Sul

TL;DR: In this paper, a position sensorless control scheme for synchronous reluctance motors using high frequency current injection is presented, which gives robust and dynamic estimation of the rotor angle independent of the operating condition including standstill and light and heavy loading.

TL;DR: In this paper, a rotor position controller for sensorless vector control of permanent magnet synchronous machines (PMSM) based on a synchronous d-q frame phase-locked loop (PLL) is presented.

TL;DR: In this article, a new pulsewidth modulation (PWM) method for the matrix converter is proposed to generally use these three virtual dc-link voltages, which can create the identical switching sequences to those created by the conventional space vector PWM (SVPWM), and a new switching sequence that reduces output current switching ripple can be easily adopted within the proposed PWM method.

TL;DR: In this article, a three-phase high power factor rectifier for an electrolytic capacitor-less inverter based on the current injection scheme is described, where the rectifier injects the machine side zero sequence current into the grid side through three bi-directional switches.

TL;DR: In this paper, an interior permanent magnet synchronous machine (IPMSM) with an asymmetric rotor and search coils is proposed to eliminate the initial motion of the rotor, and the information of the absolute position is included in the voltage signals at the search coils.