Servo Motor Versus Power Braking

 

Three instances of braking were examined for both power braking and servo braking.  Servo braking was found to use significantly less energy with an average energy use 0.45 J.  Power Braking was found to use an average of 12.14 J of energy. The table below shows these results.

Power Braking Servo Braking
Energy 12.14 J 0.45 J

The power braking tests showed that it required significantly more energy to come to a stop when compared with coasting.  The tests at 20% power resulted in nearly twice the energy required to stop within three inches of each other.  A higher energy consumption was expected due to the motors having to be ran in the reverse direction for a short period of time.  While coasting was the more cost effective method, it did not provide reliable results in regard to stopping location. When Servo braking was examined, a lower energy consumption was expected, but not to the degree to which it was lower.  Even with the extra capital cost of $5,950 for the servo motor, it saved an average of $6,047.50 for each instance of braking when compared to power braking. This led the team to a determination that servo braking was the optimal braking method.