Efficiency of Electric Motors

https://www.google.com/amp/s/news.ewmfg.com/blog/comparing-shaded-pole-psc-and-ec-motors%3fhs_amp=true

Shaded pole motors are only 30% efficient.

Other brushed ones are 60%.

Electrically commutated motors are 70-83% acc to this article.

History

• Brushless motors were first made in 1962. [1]

Links

• Small electric motors are 10-70% efficient. BLDC are Bout 2x as efficient. Good report comparing BLDC to brushed at small scale of few grams - [2]