Hobbyist Forums banner
1 - 13 of 13 Posts

·
Registered
Joined
·
1 Posts
Discussion Starter · #1 ·
Hi, maybe you can help me with some design,

Please try to answer those two questions:
1. Does the motor with 7 pole pair offers approximately 7 times slower minimum (stable) speed then the motor with 1 pole pair ?

2. Let's say I'm using vector control for achieving the minimum stable speed and I get 10rpm. Could you take an educated guess and say what would probably be the min stable speed using scalar control, or even more simple, using Trapezoidal control with hall sensors?

If yo don't know the answers to both questions please answer the one you know.

Tnx
 

·
Registered
Joined
·
275 Posts
#1. Simple yes.

#2. Depending on the parasitic whirling ocillation of the parsipial mode, you would experience an anular quasi inepular of around 32 degrees kelvin. In other words, the hall sensors would be useless once power is applied. Good luck, Ron
 

·
Registered
Joined
·
2,685 Posts
#1. Simple yes.

#2. Depending on the parasitic whirling ocillation of the parsipial mode, you would experience an anular quasi inepular of around 32 degrees kelvin. In other words, the hall sensors would be useless once power is applied. Good luck, Ron
And I thought I had these brushless motors all figured out! LOL!
 
1 - 13 of 13 Posts
Top