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

fYear

2007

fDate

2-5 April 2007

Firstpage

1244

Lastpage

1250

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Conversion Conference - Nagoya, 2007. PCC '07

Conference_Location

Nagoya

Print_ISBN

1-4244-0844-X

Electronic_ISBN

1-4244-0844-X

Type

conf

DOI

10.1109/PCCON.2007.373125

Filename

4239315