Sigmadrive - AC Induction & DC Motor Controllers

Sigmadrive is a range of advanced, high-efficiency controllers for AC induction and DC motors that use Insulated Metal Substrate (IMS) technology to provide superior performance and exceptional reliability.


Sigmadrive controllers possess many features and capabilities that will benefit the electric vehicle designer, including:

  • Elegant, low-profile package
  • High power-to-size ratio
  • Assured gradient control

Sigmadrive is available in 3 frame sizes covering AC induction and most DC motor types for traction, pump, and power steering functions over a wide range of battery voltages and power outputs.

For further information on product features and specifications, use the product links below.




Filter Products:

PG Drives Technology

sigma motors: technology & applications

The Sigmadrive family of AC and DC motor controllers spans power ratings of 24V, 175A to 80V 650A in three package sizes, each intended to give optimal price and performance.


Types of motor technologies supported: 

  • AC induction
  • DC series
  • DC separately excited
  • DC permanent magnet


Sigmadrive controllers are designed for use in the challenging environments typical of electric vehicles, providing excellent protection against dust and water in an incredibly low-profile, rugged package.


The Sigmadrive family of speed controllers for induction motors and ancillary products have been developed for use in a wide range of electric vehicle applications, including:

  • Materials Handling
  • Airport Ground Support
  • Industrial
  • Utility
  • Mobile Elevating Work Platforms




Insulated Metal Substrate (IMS) technology is fully utilized to provide superior thermal performance and exceptional reliability. 


It increases reliability and enables Sigmadrive to provide a higher continuous current and smaller physical size than other controllers of the same power rating.



Traction controllers are linked by CANbus communication to allow safe and reliable vehicle operation.


Multiple Sigmadrives can be interfaced via the CANbus to provide control of all vehicle functions and allow direct interfacing with the ancillary products such as the Sigmagauge LCD vehicle display, Sigma I/O modules, and other third-party equipment to ensure easy system building.



Sigmadrive based systems can be quickly configured using the powerful Hand Held Programmer; this device allows easy set-up using "real" units such as Volts, Hz, Amps, and Seconds.


Motor Controller Purpose & Functionality


Motor controllers are devices that pre-determine the performance of an electric motor. They typically include a manual or automatic operation for starting or stopping the motor, selecting forward or reverse, and speeding up or slowing down. It does this by manipulating the voltage that is applied to it. 

Motor Speed Controller Applications

Due to their variability, motor speed controllers are suitable for many applications, including conveyors, turntables, and others requiring adjustable speed and constant or low-speed torque. They are also the preferred choice in dynamic braking and reversing applications.

Popular applications

  • Robotics
  • Manufacturing
  • Military
  • Automobiles
  • Industrial 

What is a motor speed controller?

A motor speed controller is an electronic device that controls motor speed. They can do the following:

  • Protect against circuit faults
  • Smooth acceleration and deceleration
  • Provide a controlled start-up [or soft start].
  • Reverse
  • Reverse polarity protection

How do you control the speed of an electric motor?

An electric motor is driven by an alternating current and includes two basic parts: an outside stator having coils supplied with alternating current to produce a rotating magnetic field and an inside rotor attached to the output shaft producing a second rotating magnetic field. The most common and efficient way of altering an electric motor’s speed is to vary the frequency by using an inverter as the power source.

To discuss your application requirements, contact your nearest sales office or fill in a contact form. Our experienced sales teams are available worldwide to discuss different power options and motor technologies supported.