Title :
Voltage Control of a Bi-Directional Isolated DC/DC Converter for Medium-Voltage Motor Drives
Author :
Inoue, Shigenori ; Akagi, Hirofumi
Author_Institution :
Tokyo Inst. of Technol., Tokyo
Abstract :
This paper describes a next-generation 6.6-kV motor drive employing a bi-directional isolated dc/dc converter instead of a line-frequency transformer. It consists of cascaded six "converter cells" in each phase. Each converter cell includes a bi-directional isolated dc/dc converter and two single-phase PWM converters. On the focus is dc voltage control by the bidirectional isolated dc/dc converter, together with the implementation of the dc/dc converter. Small-signal analysis reveals that the control system can be described as a second-order system. The control scheme is confirmed by both computer simulation and experiment based on a dc/dc converter rated at 360 V, 10 kW, and 20 kHz. Simulation and experimental results verify effectiveness of the control method in both steady-state and transient characteristics.
Keywords :
DC-DC power convertors; PWM power convertors; machine control; motor drives; voltage control; bidirectional isolated dc/dc converter; converter cells; dc voltage control; medium-voltage motor drives; single-phase PWM converters; voltage 6.6 kV; Bidirectional control; Computational modeling; Computer simulation; Control system synthesis; Control systems; DC-DC power converters; Medium voltage; Motor drives; Pulse width modulation converters; Voltage control; Bi-directional isolated dc/dc converter; medium-voltage motor drive; voltage control;
Conference_Titel :
Power Conversion Conference - Nagoya, 2007. PCC '07
Conference_Location :
Nagoya
Print_ISBN :
1-4244-0844-X
Electronic_ISBN :
1-4244-0844-X
DOI :
10.1109/PCCON.2007.373125
