I have designed electric motors for years.Now I believe manufacturing matters even more.
- Murali krishna
- Aug 3
- 1 min read
India must build motors, not just buy. Agree?
Manufacturing matters more than design
A good motor design can still fail.
Poor manufacturing reduces efficiency.
Process capability decides consistency.
Design and manufacturing must evolve together.
India's EV market continues to grow rapidly.
Localization now matters more than ever.
Each machine controls a critical process.
Engineers often don't realize the tolerances involved.
Rotor concentricity.
Air-gap control.
Magnet positioning accuracy.
Coil placement accuracy.
Shaft runout.
Dynamic balancing.
Lamination stacking decides magnetic performance.
Coil winding affects efficiency and reliability.
Magnet insertion demands high precision.
Rotor balancing reduces vibration and noise.
Varnish impregnation improves insulation life.
End-of-line testing validates every motor.
EV sales in India continue to grow year over year.
Motor manufacturing involves dozens of critical process steps.
A traction motor contains tens of precision-engineered components.
A few microns of rotor eccentricity can
Significantly affect NVH and efficiency.
Manufacturing defects often account for more
Field failures than design flaws in mature products.
After visiting many motor factories,
One lesson stays with me.
Great motors are not assembled.
They are built through disciplined
Manufacturing processes.
Even small variations can
Affect efficiency and reliability
⚙️ Every process shapes final performance.
Which manufacturing process do you think contributes
Most to long-term motor performance, yet
Receives the least engineering attention?
Picture: A throwback to my time working in China
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