Integrated Starter Generator (ISG) ECU

Integrated Starter Generator (ISG) is a technology that eliminates the need for conventional starter-motor based engine start systems. ISG results in instant and smooth engine start, improved reliability and also enables idle stop-start feature.

SEDEMAC offers ISG ECUs for small engines with crankshaft mounted alternators (like used in two-wheelers). The forward looking ECU architecture design enables integration of electronics of other control intensive technologies such as Electronic Fuel Injection (EFI) Automated Manual Transmission (AMT). It integrates engine starting, battery charging and ignition control resulting in a centralised and intelligent control of overall engine / vehicle operation.

SEDEMAC's Sensorless ISG has now hit the market … Adopted first on a high-volume 2-Wh model of a major OEM!


  • Unique sensorless electric machine control (patent pending) design. Eliminates need for use of hall sensors resulting in improved reliability and simplified electric machine design.
  • Series type power regulation method resulting in improved generation efficiency
  • Ignition control utilizing SEDEMAC’s Smart Ignition technology
  • Built-in idle-stop-start control resulting in fuel efficiency improvement


Why is ISG better than conventional starter motor system?

ISG has several advantages, such as:

  • The entire starter motor system is eliminated thereby improving overall reliability
  • ISG is the most suited technology for incorporating idle-start stop functionality. In particular, there is no need for a starter motor that supports higher start-stop duties
  • ISG provides instant, "cool" starts. The engine just "comes to life" and there is no "cranking noise" or struggle
  • Improved start reliability and improved user confidence for starts. This is particularly useful in situations involving repeated starts such as in stop-go traffic
  • ISG systems typically draw lesser currents (vis-à-vis starter motor systems) thereby aiding improvement in battery life
What all parts are removed if I use SEDEMAC's ISG?
What is unique about SEDEMAC's ISG solution?