HITACHI : Easy Maintenance and Environmentally-friendly Train Traction System

Volume 53 Number 1 February 2004

AUTHORS

Takashi Kaneko	Rolling Stock Electrical Systems Design Dept., Mito Transportation Systems Product Div., Power & Industrial Systems, Hitachi, Ltd.
Motomi Shimada	Rolling Stock Development Center, Mito Transportation Systems Product Div., Power & Industrial Systems, Hitachi, Ltd.
Shinichiro Kujiraoka	Rolling Stock Electrical Systems Design Dept., Mito Transportation Systems Product Div., Power & Industrial Systems, Hitachi, Ltd.
Tetsuo Kojima	Rolling Stock Development Center, Mito Transportation Systems Product Div., Power & Industrial Systems, Hitachi, Ltd.

OVERVIEW

Hitachi, Ltd. has been developing converter-inverter systems and auxiliary power converters to which they have applied vector control techniques and high-voltage IGBTs (insulated gate bipolar transistors), airless line breakers, and electronic master controllers. These are applied to make train traction systems more functional, to make maintenance easier, and to reduce energy consumption. The need is growing for diesel-powered train traction systems that are easy to maintain, highly efficient, and environmentally friendly. Moreover, the demand exists for much smaller traction systems for electric trains. Therefore Hitachi developed hybrid propulsion systems for diesel-powered trains to which the traction systems techniques for electric trains was applied, and small cooling equipment that uses water circulation. Both of them were developed jointly with East Japan Railway Company (JR-East). In addition, Hitachi developed sensorless speed vector control that eliminates the need for a speed sensor, and an all-speed range electric brake that can stop a train without pneumatic braking along with technology that uses these two technologies together.

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See PDF file for details(PDFformat, r2004_01_103.pdf, 146KB)

RELEVANT SITES

	Mito Transportation Systems Product Division (Japanese Only)
	Hitachi Rail Systems
	Hybrid Propulsion System
	The Hitachi Hyoron (Japanese Only)

KEYWORDS

environmentally-friendly, energy storage, greenhouse gas free, water circulation cooling system

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