Mutsuo Nakaoka

TL;DR: In this paper, the authors proposed analytical expressions of a deadbeat control system for the output LCL filter in a grid-connected inverter with a settling time of three sampling periods.

TL;DR: In this article, a simple control structure for a vector-controlled stand-alone induction generator (IG) used to operate under variable speeds is described. And the required reactive power for the variable-speed IG is supplied by means of the PWM converter and a capacitor bank to build up the voltage of the IG without the need for a battery.

TL;DR: A high-frequency link PFC rectifier, its related operating principle and control strategy, together with the steady-state and dynamic state performances of these types of UPSs developed from a practical point of view are presented.

TL;DR: In this article, the authors proposed a delta-sigma modulation circuit, which consists of two stage delta-Sigma modulators, in which the first stage adds a dither signal to the reference input signal and the second stage alters the feedback signal of the delta Sigma modulator to the continuous signal of DC-DC converter output.

TL;DR: In this article, the authors present a schematic review of a travelling-wave type ultrasonic motor (T-USM) and a newly-proposed weight-quality speed tracking controller for a TUSM on the basis of a computer software-based variable gain adjustment strategy.