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Design and Realisation of Battery Powered Drivetrains

 PM DC Controller for motors to 4KW

The Millipak™4Q controller operates in full 4-quadrant mode allowing contactor-free operation in direction changing and regenerative braking. It operates in either torque or closed loop speed control mode.
The Millipak™4Q permits adjustable regenerative braking without the use of additional electronic circuitry and contactors.
  • Very compact design
  • Silent operation
  • Torque/speed control
  • Regenerative braking
  • Integrated logic unit
  • Calibrator interface
  • FLASH memory
  • IP66 protection
  • Soft start pump option
General Specifications
  Battery voltage
48 VDC
  Max. power output 4 kW  
  Peak current (1 min) 300 A (1 minute rating)
  Soft start 100 A (option)
  Operating temperature -30 to + 40ºC (ref. SAE J1211)
  Storage temperature -40 to + 70ºC (ref. SAE J1211)
  Ingress of dust
  and water
  Humidity 95% (at 60ºC)
  Vibration 6 G (NAVMAT P9492 random vibration
test profile)
  Switching frequency 16 kHz
Ultra Compact Design
The Millipak product line is an ultra compact series of controllers providing an unrivalled power to dimension ratio which optimizes the power/size/cost relationship.
Small pallet trucks, sweepers, scissor lifts, golf carts, marine and other electric vehicles fitted with Permanent Magnet DC motors.
Enhanced Thermal Design
Using advanced mechanical package design and thermally conductive materials the Millipak controllers provide high power in a very small foot print.
FLASH Memory for Flexibility
Application programs are stored in FLASH memory allowing reprogramming in place for increased flexibility.
Rugged Endurance
Sealed-for-life design combined with rigorous testing ensures that Millipak controllers deliver unparalleled reliability.
Inputs and Outputs
Various configurations for analog and digital  inputs and outputs are standard with functionality for a wide range of applications.
Configuration and
Service Tools
The Sevcon PCpak configuration system or a hand-held Calibrator can be used to adjust parameters and reprogramming of the controllers
  View the Millipak brochure

AC Controller Gen4
This controller is designed to control both AC Induction and Permanent Magnet AC Motors.

The Gen4-series represent the absolute latest design concept for compact and reliable AC Controllers. They feature the smallest footprint in the industry for their power capability.
The high efficiency of these controller makes it possible to integrate them into very tight spaces without sacrificing performance. The design has been optimized for the lowest possible cost while maintaining superior reliability in the most demanding applications.
  • Sealed IP66 enclosure
  • Integrated logic circuit (I/O)
  • Advanced flux vector control
  • Motor self-characterization
  • Autocheck - system diagnostics
  • Fully CANopen compliant
  • Sensorless control

DC/DC Converter  
DC / DC Converter for Electric Powered Vehicles
The Sevcon DC/DC Converters are suitable for all electric powered vehicles and are designed to be fitted on-board the vehicle and connected permanently to the battery.

These converters deliver a stable isolated high power, low voltage DC supply for such accessories as lights, horns, and wipers. This eliminates inefficient battery taps and fragile, expensive high voltage accessories.
 DC/DC Converter Range
 Part Number
Nominal Input Voltage (VDC) Nominal
Power (W)
Voltage (VDC)
 622/11083 24 / 36 300 24
 622/11071 36 / 48 180 12
 622/11084 36 / 48 300 12
 622/11073 36 / 48 180 24
 622/11085 36 / 48 300 24
 622/11075 72 / 80 180 12
 622/11086 72 / 80 300 12
 622/11077 72 / 80 180 24
 622/11087 72 / 80 300 24
 General Specifications
 Operating temperature (ºC): -35 to +85
 Storage temperature (ºC): -40 to +70
 Repetitive shock: 50 G
 Vibration:   6 G, 40 - 200 Hz
 Ingress of dust and water:
IP 67
Custom, Compact Design
Custom designed for use with motor controllers, these compact, yet powerful converters can be connected in parallel for higher power requirements to perform reliably in industrial and commercial environments.
Isolated Output
Safer than direct battery connection, these converters provide an electrically isolated output for ancillary equipment.
Stable Voltage
Output is regulated to 13 or 26 VDC, depending on the model, and is maintained regardless of input voltage variations throughout the operating range.
Durable Reliability
Encapsulated to achieve a protection rating to IP67, these converters can be used with complete confidence in the most punishing environments.
   View the DC/DC brochure