Question

Using the graph template or other means, calculate the no-load speed of the motor given the following table of results of a series of measurements of speed and torque of an electric motor. Speed rad s1Torque Nm 200.0 260.0 220.0 A00. 180.0 6oo. Drag and drop the markers provided (or use the arrow keys on your keyboard) to plot the three points on the graph then position the movable line in the same way to produce the speed/torque curve to calculate your answer Speed rad/s 1,600 1,400 1,200 1,000 800 600 400 0 200 300 400 500 100 3 Torque Nm 2 no-load speed rad s-1

Answer 1

No load speed is the speed at which Torque is zero

Speed Tadis 1, 1520 1,400 1,200 1,000 800 600 400 200 200 300 500 400 Torque Nm

Hence the point where the produced pink line meets at 0Nm gives is the no load speed as 1520 rad/s

(Note that one block along Y axis represents 40 rad/s)