In case of alternator, why is the diameter of a cylindrical rotor kept less and more length as compared to a salient pole rotor? - Quora
![ALTERNATORS - CONSTANT SPEED - SYNCHRONOUS LOW VOLTAGE AC IP23 - 2 POLES - 3 PHASE - BRUSHLESS / AVR SUPERCOMPACT ALTERNATORS - CONSTANT SPEED - SYNCHRONOUS LOW VOLTAGE AC IP23 - 2 POLES - 3 PHASE - BRUSHLESS / AVR SUPERCOMPACT](https://www.sogaenergyteam.com/wp-content/uploads/2015/12/SK_160.jpg)
ALTERNATORS - CONSTANT SPEED - SYNCHRONOUS LOW VOLTAGE AC IP23 - 2 POLES - 3 PHASE - BRUSHLESS / AVR SUPERCOMPACT
![Figure 1 from Hybrid excited claw pole rotor for high power density automotive alternators | Semantic Scholar Figure 1 from Hybrid excited claw pole rotor for high power density automotive alternators | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/0f9f77659e1f75cbdee5df8974de3b057dae9b95/2-Figure1-1.png)