SENSORLESS 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!

End-user feedback


  • 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?





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