Prior to the advent of the adjustable-speed drive (ASD), the polyphase induction motor operated as a constant-speed motor. Figure 1 shows the well-known torque and current curves versus speed for the ...

Brushless DC motors are common place in RC Vehicles ... A general RC Vehicle electronic speed control and a servo tester work in conjunction to manually regulate the spindle speed.

One way an hvacr service tech can determine that s/he is making good motor replacement decisions in the field is to understand the concept of motor speed so that the speed of one ac induction motor ...