Fligh High
100 mW
This has been a question that has been on my mind some time , hope that someone can make it clearer for me.
A brushless motor is driven by a controller that is making very tiny very quick current pulses 10 Khz and more to provide the required average amount of power wanted on the coils of the motor.
As far as I have understood , some controllers will change this PWM into 1 block-pulse at a certain moment. Just 1 block of electricity of a certain determined length instead of tiny pulses following each other up .
I can imagine when you (can) go from PWM to Block-pulses this has some advantages , maybe better efficiency or controller/Fet speed-related.
So my question is WHEN do you go from PWM to Block-pulse :? And do all the controllers you guys are using do that as a matter of fact already ?
My own best guess is that the best moment RPM-wise to do Block commutation is as quickly as possible , if the motor can rotate smoothly (rotating mass related ?) but that is just an idea of mine....
How does this work in practice ?
A brushless motor is driven by a controller that is making very tiny very quick current pulses 10 Khz and more to provide the required average amount of power wanted on the coils of the motor.
As far as I have understood , some controllers will change this PWM into 1 block-pulse at a certain moment. Just 1 block of electricity of a certain determined length instead of tiny pulses following each other up .
I can imagine when you (can) go from PWM to Block-pulses this has some advantages , maybe better efficiency or controller/Fet speed-related.
So my question is WHEN do you go from PWM to Block-pulse :? And do all the controllers you guys are using do that as a matter of fact already ?
My own best guess is that the best moment RPM-wise to do Block commutation is as quickly as possible , if the motor can rotate smoothly (rotating mass related ?) but that is just an idea of mine....
How does this work in practice ?