The strength of the solid magnet in a brushed DC motor significantly influences its efficiency and performance. A stronger magnet allows for fewer turns of wire, reducing winding resistance losses and potentially increasing the motor's efficiency. However, both strong and weaker magnets can produce motors with high horsepower and RPM, depending on the design and power source. Ultimately, real-world limitations dictate the maximum power output of any motor.
PREREQUISITESEngineers, motor designers, and hobbyists interested in optimizing the performance of brushed DC motors for applications requiring high horsepower and RPM.
CWatters said:A agree. You need to read up on DC motors.
It may seem obvious that a stronger magnet will give a stronger motor but it's not that simple. The strength of the magnet has an effect on the number of turns required to achieve the desired "no load rpm". Using a stronger magnet allows you to use fewer turns and so reduces losses in the winding resistance. In short a stronger magnet might produce a more efficient motor but (with some assumptions) both can produce a "strong" motor.
That said what do you mean by a "strong" motor? An ideal motor turns all the electrical power into mechanical power so they are all as "strong" as the power source. In the end it's real world effects that limit how much power a motor can deliver.