Merits and Demerits of Stepper Motor
Followings are the merits and demerits of stepper motors.
Merits :
a.They are compatible with digital systems
b.For the control of position and speed it can be used in open loop control as well as closed loop control.
c. A wide range of step angle is possible .
d.Since maximum torque occurs at low pulse rate in SM, hence it can accurate its load easily.
e.Moment of inert in is usually low.
f.Without any reduction gear it is possible to move it at low speeds.
g.Bidirectional control is possible.
h.Excellent response to stating stopping reversing.
i.Very reliable since there are no brushes in the motor.
j.Precise positioning and reputability of movement since good stepper motors have an accuracy of 35 to 5% of a step and this error is non cumulative from one step to the next.
Demerits
a.Low efficiency
b.Problem of resonance in VRM.
c.Proper matching between load and drive is required.
d.Not easy to operate at extremely high speeds.