Power Conversion for Heavy Rail

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

Schaefer specializes in solutions for on-board and trackside heavy 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, including on-board electronics, as well as other transit vehicles, mining vehicles, and switches.

Schaefer's Product Features

  • 36VDC, 37.5VDC, 74VDC or 110VDC
  • Ultra-wide input ranges to handle extremes, such as the 74VDC bus.
  • Steady output power even during start-up or cranking conditions
  • Buck, boost, or isolated topology
  • DC/DC, DC/AC, AC/DC or AC/AC
  • Custom solutions, typically with no NRE
  • High efficiency for lower cost of ownership
  • Hermetically sealed solutions
  • Natural convection or water-cooled solutions
  • Extra rugged construction for use in the most demanding and harsh trackside and on-board environments
  • Redundant configurations for longer life operation in critical applications
  • Ultra-wide temperature ranges
  • Lightweight, high power density for smaller package designs

Schaefer Capabilities for Heavy Rail

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.

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.