Power Conversion for Transit / Light Rail

Subway Train
ON BOARD		 Railroad Tracks
TRACKSIDE		 Bus
IN CAB		 Subway Train
UNDER CAR

Schaefer specializes in solutions for on-board and trackside light rail applications. Our unique design and manufacturing allows flexibility in power conversion for an endless combination of input and output voltages. Extra rugged construction ensures long-life, reliable operation in even the most demanding applications.

Schaefer's Product Features

  • 24 , 36, 37.5, 600, 750VDC or higher voltages on request
  • Buck, boost, or isolated topology
  • DC/DC, DC/AC, AC/DC or AC/AC
  • Custom solutions, typically with no NRE
  • Ultra-wide input ranges to handle extremes, including transients from 3rd rail or catenary
  • High efficiency for lower cost of ownership
  • Hermetically sealed solutions
  • Natural convection or water-cooled solutions
  • Redundant configurations for longer life operation in critical applications
  • Ultra-wide temperature ranges
  • Reverse polarity protection option
  • Lightweight, high power density for smaller package designs

Schaefer Capabilities for Transit / Light Rail

PROBLEM:  Locomotives in yard need to be moved for service or put into operation.

Dead Start Power Supply

SCHAEFER SOLUTION:  Dead Start DC/DC energizes batteries, allowing for immediate start-up of locomotive in yard.

PROBLEM:  Onboard systems must be operational during engine cranking when battery voltage drops below 20VDC.

Wide DC Input Power Supply

SCHAEFER SOLUTION:  Wide DC input allows for full power during cranking or at system start up.