Custom Power Supply Solutions from Schaefer

Schaefer is your Custom Power Supply Design Solution Partner.   With almost 50 years of experience and over 1,000 power custom designed products, you can rely on our engineering and manufacturing expertise for your specific application needs.

We easily can optimize our standard products by installing them into custom enclosures, adding meters, switches or any other required functionality.   Typically with little or no NRE!

Let us be your Engineering Department!   From concept to first articles to production, we research and provide testing for thermal analysis, FMECA, Halt, Hass, loop stability/optimization, MTBF, FIT, PDR, and CDR.


Examples of Schaefer's Extensive Custom Power Expertise

Custom Power Supply Capability

  Comprehensive Custom Project Management

  • For custom products, Schaefer specializes in handling all phases of project management, including engineering analysis and development of unique designs.
  • PDR, CDR, & FAT
  • ESS, FMECA, HASS, HALT, MBTF, Single Point of Failure, and Thermal Analysis
  • Phase gain and optimization

  Oil Drilling Platform Power System

  • Battery symmetry, temperature, & voltage alarms
  • Ground fault detection with alarms
  • N+1 power modules

  Utility Power System

  • N+1 power modules
  • Individual output voltage selection and trim function
  • Adjustable output voltages

  Rolling Stock Mounted Inverter

  • 8kVA, 230VAC/50Hz inverters for supplying onboard consumer AC loads
  • Extensive testing ensures a high degree of protection for shock/vibration, EMC, and environmental conditions, such as wide temperature and humidity

   40kW Multi Input / Output
   On-Board Power System

  • Hermetically sealed enclosure
  • Controlled air management
  • Battery charger & DC Bus supply
  • Rigorous environmental specifications
  • Engineered for robust shock & vibration
  • Self protecting; auto assessment of thermal and electrical parameters

   On-Board Rail Application
   AC/DC Power Supply

  • Handles high degree of shock/vibration
  • 100% autonomous design; turnkey solution
  • Custom client-specific interface
  • Continuous short circuit protection
  • Overvoltage protection
  • Manufacturing with industrial grade components

   RC2 Cargo Locomotive Refurbishment

  • 58VDC/100A charges on-board batteries and supplies on-board DC loads
  • Extensive testing ensures a high degree of protection for shock/vibration, EMC, and environmental conditions, such as wide temperature and humidity
High Density On-Board Train

   High Power Density
   On-Board Train Application

  • 24kW switch mode battery charger
  • IP66 dust and dirt protection
  • -40C to +80C operating temperature
  • Handles extreme shock / vibration
Multiple Input / Multiple Output Converter

   Multi Input/Output Converter
   Powers Mobile Measurement Systems -
Rail Test Drives

  • Intelligent energy management with battery back up and load simulation
  • Variety of AC and DC inputs
  • Variety of DC outputs and an optional AC output
  • CANbus interface
4.5kW Converter for Tram Applications

   4.5kW Converter for Tram Applications

  • Based on Schaefer C5000 Series (standard products)
  • Stainless steel enclosure
  • IP54 Protection
  • Under floor mounting
Switching Power Supply For Rail Industry

   Switch Mode Power for Rail Industry

  • High power density
  • Rated for up to 97% non-condensing humidity
  • Client specified interface and signals on front panel
  • 19" rack design; vertical convection cooling
  • SPS controller provides programmable output
DC/DC Power for Transportation 

   DC/DC Converter for Transportation Industry

  • 7 outputs
  • Engineered for extreme shock and vibration
  • Robust, yet compact design
  • -40C to +75C operating temperature
  • Short circuit and overvoltage protection
4kW Converter for Eurofighter Mains Simulation

   4kW Converter
   Eurofighter Mains Simulation

  • 400Hz mains simulation
  • 3-phase AC output or 3 individual DC outputs
  • Each output voltage and frequency independently RS232 programmable
Radar Defense Project Power Supply

   7KW Military Project

  • Fan cooled AC/DC power converter
  • Power Factor Corrected (PFC) three-phase input
Aircraft Test Mains Simulator Power Supply

   3.6kVA Power Supply
   Aircraft Test Applications

  • Designed for laboratory use / mains simulation
  • Adjustable frequency 40-400Hz
  • Adjustable output voltages 0-200VAC phase-to-phase or 0-115VAC phase-neutral
  • GBIB interface for remote programming and monitoring
  • Digital displays for output voltage, current, and frequency
Military Grade Inverter, Static Switch, Battery Charger

   Military Grade Integrated Inverter,
   Static Switch and Battery Charger

  • 6U, 19" rackmount mechanical
  • Robust design
  • Quality engineering matched to client's design parameters
5kW Military Grade Power Supply

   Military Grade 5kW Power Supply

  • Populate 5U rack with three vertically mounted units
  • Populate 3U rack with two horizontally mounted units
  • High power density
  • MIL-STD 810F / MIL-STD 461E / MIL-STD 1399 / MIL-STD 1322B
3kVA DC/AC Inverter with Parallel Function

   3kVA Inverter with Parallel Function
   On-Board Mobile Applications

  • DC Input from generator or battery power
  • MIL-STD 461E, MIL-STD 1322B, MIL-STD 810F
  • Rugged design handles extreme shock, vibration, temperatures and altitude changes
  • DSP controlled inversion for optimum power control
  • Application specific extremely compact design
  • Compressor application with 11x nominal load surges
Military Grade 19" Rack Power Supply

   Military Grade 19" Rack Power Supply

  • Battery charger and inverter in one 19" rack
  • Robust design with increased mechanical strength
  • Installed in a highly demanding environment within a suit of armor
KTA3507 Certified Power Generation Industry Power Supply

   KTA 3507 Certified Power Supply
   Power Generation Industry

  • Evaluates reactor core temperature
  • Highly reliable, redundant fault tolerant
  • 19" rack mechanical solution with enhanced design
  • Client interface for programmable output parameters
Static Switch for Sub Station

  Electronic Static Switch
  Critical Sub Station Application

  • Dual redundant AND fault tolerant configuration; N+2 design
  • Input from multiple, independent DC and AC sources
  • Automatic AND manual bypass system
  • Integrated and isolated AC bypass
22kV UPS for Power Plant Switchgear

   Power Plant 22kV Switchgear Control

  • 48VDC UPS system for high voltage mains power switchgear management
  • Cabinet includes UPS system and batteries
1kVA Inverter for Nuclear Power Plant

   1kVA Inverter for Nuclear Power Plant

  • 220VAC/50Hz inverter
  • Powers reactor emergency cooling system
  • Swiss nuclear power authority approved design
200kW DC Power Network

   200kW DC Power Network

  • 110VDC power system
  • Dual 800A configuration
  • Full operation up to +55C
  • IP42 Rated
 10kW Power Supply for Automation Industry

   10kW Power Supply for Automation Industry

  • 24 output voltages from -120VDC to +120VDC
  • 10kW total output power
  • Output voltage monitoring
  • 14 pluggable modules
  • <10mVp-p ripple on outputs
AC/DC Power for Automation Industry

   Rugged AC/DC Power Supply
   Automation Industry

  • Variety of output voltages available
  • Withstands high degree of shock and vibration
  • Voltage and current indicators
  • Remote on/off (inhibit)
  • Continuous short circuit protection
  • Overvoltage protection
Digital Controlled Generator

   Digitally Controlled Generator

  • Adjustable power source: 0-30A
  • Synchronized output at Uout=300V; adjustable frequency from 200Hz to 300KHz
  • Unique pluggable system; installation on water cooled heat sinks via pressure rails
  • Communication via EtherCat (PC generator)
Subsea Exploration Power Supply

   Integrated Switch Mode Power Supply
   Subsea Mineral Exploration Application

  • Withstands extreme environmental challenges
  • Wide range of AC inputs
  • Robust heat sink design integrates into sealed pipe
  • Highly reliable, redundant, fault tolerant capability
Subsea Power Supply

   DC/DC Converter
   Heavy Industrial Application

  • Input voltage range up to 3000VDC  (maximum)
  • Pigtail connection
  • Galvanic isolation
"Paperback Size" 500W Power Supply

  "Paperback Size" 500W Power Supply
   Mobile Telecommunications Network Application

  • UMTS/GSM/DCS Applications
  • Compact and robust design
  • Thermal discharge through heat pipes
 Multi Input/Output Converter for Marine Environment

   Multi Input / Multi Output Converter
   Marine Environment

  • Wide range input voltage from multiple sources
  • Integrated charger / inverter
  • Expansion through direct parallel configuration on DC bus and AC bus
  • Micro controller and monitoring function
  • Designed for maximum client integration flexibility
  • Engineered for maximum degree of shock and vibration
Fiber Optic Laser Power Supply

   15kW Power Supply
   Fiber Optic Laser Application

  • Liquid cooled power supply
  • Integrated charger / inverter
  • Hermetically sealed enclosure
  • Indicators for voltage and current
  • Interfaces for voltage, current, and temperature
Airport Security Power Supply

   7kVA Power Supply
   Airport Security Application

  • Wide 208VAC-400VAC input
  • Temperature controlled fans
  • 4U plug in module design
Substation 2.5kW DC/AC Inverter

   2.5kVA Inverter
   Substation Application

  • 4U module with integrated static switch
  • Inhibit (open load fail safe) on static switch
  • Power scaled display
  • Common alarm
Marine Buoy Power Supply

   Power Supply
   Heavy Industrial Application

  • 2000VDC galvanic isolated output voltage
  • Programmable output
  • Reduced power during turn-on
  • Handles extreme environmental demands
  • Designed for extreme shock, vibration, and temperature conditions
40kW Power Supply for Laser Application

   40kW Power Supply
   Laser Equipment Application

  • Liquid cooled, hermetically sealed enclosure, rated to IP54
  • Inrush current limiting via phase controlled modulator
  • Voltage, current, and temperature indication via isolation amplifier
  • Voltage and current LED indicators
  • CAN-Bus indicators
400kW Aircraft Starter System

   400kW Aircraft Starter System

  • 290VDC Power Supply System
  • Dual 700A configuration
  • Powers a highly inductive turbine load
Optimized Raptor Power Supply

   Optimized Raptor

  • 115VAC Input (3-Phase Available)
  • 1800W Output Power (12VDC-32VDC)
  • Digital Meters
  • Mil Connectors & Quick Connect Output Terminals
Military Base Battery Charging System

   Military Base Battery Charging System
   Secure, Safe Chemical Shelter

  • 36+ Battery Chargers in One Enclosure
  • 12VDC and 24VDC Batteries
  • Features:  Breakers, Fuses, Reverse Polarity Protection, Battery Voltage Sensing, Incorrect Mode, Power and Failure Indicators, Front Panel Voltage Adjustment
Programmable & Optimized Power Supplies

   SLPS Series
   Programmable and Optimized Power Supplies

  • 20KW Modules  - Can Be Used Up to 6 Modules in Parallel - Up to 120KW!!
  • 600VDC+ Output
  • Active Current Sharing
  • Double Nominal Current for 10 Seconds
  • Constant Voltage or Constant Current
  • Manual or Programmable Operation
  • Full Galvanic Isolation on Supply & Programmable Pins
High Power Frequency Converter

   High Power Frequency Converter System
   Mil System Test

  • Emergency Off With Alarm Feature
  • Lockable High-IP Enclosure
  • Lockable Casters
  • Multiple Loads
  • Heavy Industrial Design
  • Movable Enclosure
Liquid Cooled Power Supply

   6.5KW Heavy Industrial
   Liquid Cooled Power Supply

  • Digital Meters
  • CAN-Bus Programmable Output Voltage
  • Alarms
  • Fully Isolated
  • Can be Optimized to Customer's Needs
Navy Vessel Multi Battery Charger

   Multiple Battery Charger
   Navy Vessel Application

  • Shore Power & Internal Power
  • Independently Charges & Monitors Multiple Batteries
  • High IP Rating / Sealed Enclosure
  • Maintenance Mode