Traction systems for airport shuttles Chicago

Strukton Rail has equipped the airport shuttles at O’Hare airport in Chicago with new propulsion systems. The replacement of the outdated propulsion systems prolonged the life of the trains with 20 years.

O'Hare Airport Transportation System (OATS)
Chicago, IL, USA
Power electronics
United States

14 million passengers

US transit company O’Hare Airport Transit System (OATS) is responsible for connecting the terminals and the parking of Chicago’s O’Hare Airport. The shuttles carry over 14 million passengers a year.

Reuse of vital components

The traction systems of the trains had to be updated, since spare parts were no longer available. Strukton Rolling Stock reused vital components from the existing system for the new units. The modernised system should be integrated seamlessly with the Automatic Train control System (ATC) that operates the trains fully automatically, without interference of a human driver.

Customer fully satisfied

An extremely thorough design process was followed by successful tests during the summer of 2007. The first upgraded trains were in operation in November 2007 to the full satisfaction of the customer.  

Down-time kept to a minimum

The new equipment – an IGBT DC chopper with associated control system – was mounted in one single container. It replaced the existing 20 year old GTO-based motor control box. The use of existing interfaces and vehicle cabling led to easy installation. The vehicle down-time for installing the modernised system could therefore be kept to a minimum.

Strukton trained the OATS staff for the operation and maintenance of the new equipment. An eleborate documentation package and software monitoring tool were delivered for additional support.