About Our Business

Train information systems / Train safety systems

Toshiba provides train information systems incorporating highly reliable CPUs and high-speed data transmission systems.
These systems functionally integrate high-efficiency control of equipment for rolling stock, safe operation, and a better notification service for passengers.
Furthermore, we offer integrated systems enabling transmission of information on operation and maintenance between rolling stock and ground terminals for information sharing.
Toshiba's train safety systems include automatic train control (ATC), automatic train stop (ATS), and automatic train operation (ATO) equipment incorporating highly reliable fail-safe CPUs. Highly redundant configurations support stable operation. Regarding master controllers for mounting on operator consoles, we provide noncontact-type master controllers that are easy to maintain, highly reliable, and easy to use.

Air-conditioning systems

As a pioneer of air conditioners for railway vehicles, Toshiba has so far supplied more than 120,000 air-conditioning units for railway vehicle applications around the world. Various sizes and cooling capacities are available corresponding to vehicle and environmental requirements so as to create comfortable space suitable for the form of the rolling stock.
Toshiba uses the environmentally friendly HFC refrigerant (Note 1) for all its newly designed air-conditioning units.
Note 1: Hydrofluorocarbon (HFC), containing hydrogen but not chlorine, is a new alternative to chlorofluorocarbon and does not destroy the ozone layer.

Auxiliary power supply systems

Toshiba offers a wide variety of auxiliary power supply systems that meet various needs and support excellent passenger services. Toshiba has an extensive track record of deliveries in Japan and overseas. Toshiba's auxiliary power supply systems achieve not only high transient responses and stable control but also compactness, light weight, and low noise.

The product lineup includes:

• 1) Two-level auxiliary power unit (APU) covering the range from 70kVA to 260kVA
• 2) High-efficiency three-level APU
• 3) Standby dual APU incorporating redundant structure
• 4) Dual mode APU, which is ordinarily used for propulsion of the main motor, but used for supplying auxiliary electric power in the event of an APU failure

Propulsion systems for AC electrified lines

These products are propulsion systems for trains that travel on AC electrified lines.
Toshiba offers these propulsion systems for AC electrified lines for high-speed railways, including the Shinkansen, local trains, etc. in Japan and overseas.
Toshiba's propulsion systems for AC electrified lines consist of high-performance devices that realize compactness, light weight, low noise, and low energy consumption.
Toshiba offers a series of convertor/inverter (CI) products that are highly reliable and whose maintenance process has been simplified.

Propulsion systems for DC electrified lines

These products are propulsion systems for trains that travel on DC electrified lines. Drawing on its long history of involvement with propulsion systems for DC electrified lines, Toshiba offers a series of VVVF inverters whose features include ease of maintenance, compactness and light weight, low energy consumption, and high reliability.
Vector control technology is applied to realize quick response and accurate torque control.
In recent years, Toshiba has delivered many systems consisting of high-efficiency main electric motors such as permanent magnet synchronous motors (PMSM) and totally enclosed traction motors for commuter trains and subways.

Product Introduction

Toshiba manufactures products and systems and delivers them to railway transport business operators for their newly built or refurbished railway vehicles.
We mainly offer products and maintenance service for train systems.

Maintenance

Railway transport business operators conduct thorough examination and repair work on the equipment and devices, as well as the parts/components incorporated in them, in accordance with the pertinent laws and regulations.

Repair

We examine and diagnose failed devices or parts at railway transport business operators and repair them if requested to do so. We reflect the data on examination and repair of failed products in preventive maintenance and make a proposal to the railway transport business operator, if necessary.

Maintenance Planning Support

In order to offer proposals, we compile a list of nondurable parts in advance so that we can replace the parts in accordance with the maintenance cycle of railway transport business operators. This is done during the period from the introduction of devices until their renewal or disposal.

Deterioration Diagnosis

We inspect the train systems before preventive and maintenance planning support and check the status of their electrical parts.

Proposals

We propose and determine the final preventive maintenance options to railway transport business operators based on the deterioration survey, taking into considering the condition of deterioration, the status of failure, and the number of operating years.

Renewal

As an option of preventive maintenance, we may add new functions to the failed devices or parts or replace them with new ones incorporating the latest technologies.

Preventive Maintenance

The lifetime of railway systems is rather long and so the incorporated electrical devices and parts are used in most cases for a period of twenty years or more.
Nevertheless, the electrical/electronic parts used in the electrical devices mounted on train vehicles typically have an expected life of fifteen to twenty years. Therefore, such electrical/electronical parts need to be replaced prior to deterioration in order to extend the life of the electrical devices and help maintain safe and stable operation of train systems.
We propose preventive maintenance involving repair and/or replacement of the electrical/electronic parts to Japan Railway companies, other public and private railway companies in Japan, and overseas railway transport business operators.

Research and Development

We aim to offer products and services for the next generation that meet market needs. To accomplish this, we accord priority to the following two major approaches:

• 1) Anticipating the future market needs through our own efforts and developing the products and services for the next generation
• 2) Directly listening to railway transport business operators to identify their needs and concerns, and developing tailor-made products and services for the next generation.

Design

We design electrical circuits, including design to cope with changes or obsolescence of parts so that the electrical devices for railway vehicles may recover their original performance. We also design the architecture and/or software of the electrical devices, if necessary.

Procurement

We procure the parts and components necessary for manufacturing products.

Production

We manufacture products or make necessary engineering changes to them.

Testing and verification

We test and verify the products by checking whether they have the required specifications and functions.