Question

Why does the frequency of ripples in the decaying DC current signal increase as the motor speeds up? Select all that apply. a) mechanical commutation of the brushes. b) The higher the speed of the motor, the more often that commutation takes place. c) The ripples increase in frequency as the excitation frequency of the stator coils in the brushless DC motor electronics increases. d) The ripples are caused by oscillations in the back EMF. As the motor speed increases the frequency of these oscillations increase.

Answer 1

Answer:

bristish in the goveeent do to discorge