I'm making a self autonomous vacuum cleaning robot for a project and I need a vacuum cleaning mechanism to install on the robot. The problem I'm having is with figuring out how to make the vacuuming system powerful enough to be impressive and be practical enough for mounting it on top of the robot chassis.
I pulled apart a car vacuum cleaner and found it had nothing much inside and just a motor which pulled 5A at 12V. So what I concluded was that the main thing here is the velocity of the motor which is what produces the air pressure, so if the velocity were increased it would become better, right?
I had an idea to use a brushless DC motor (like the ones in RC helicopters) in place of the present one as the brushless ones have much higher RPMs. Would this be a good idea or is there a flaw in this theory somewhere? And also please do share any other ideas you might have to achieve the aforementioned goal of effective vacuuming.