Difference between Stepper Motor and DC Motor

The response time of the motor and the effect of overloading.

Difference Between Stepper Motor and DC Motor are given below in the tabulated form.

BASIS	STEPPER MOTOR	DC MOTOR
Nature of loop	Stepper motor operates in Open loop.	DC Motor operates in Closed loop.
Controlling	Easily controlled with microprocessors	DC motor control is not easy
Brushes	They are brushless motor	DC motor contains brushes.
Motion and displacement	Its motion is incremental and resolution is limited to the size of the step.	They have continuous displacement and can be controlled accurately.
Response time	Response time is slow	Feedback control with DC motor gives a much faster response time as compared to a stepper motor.
Effect of Overloading	Stepper motor can be slipped if overloaded and the error cannot be detected.	If an overload occurs, it can be detected.

In the Stepper Motor the input is in the form of electric pulses and the output is in the form of mechanical motion which is unobtrusive in nature. The speed of the motion of the shaft is directly proportional to the input pulse frequency.

DC motor converts Electric energy into mechanical energy or power. The speed of the motor can be controlled by using a variable supply voltage or by changing the current strength. It follows the Fleming’s left hand rule.

Difference Between Stepper Motor and DC Motor are as follows:

    The stepper motor operates in open loop whereas Direct current motor operates in closed loop.

    Stepper are are easy to control with the help of microprocessors and other controlling devices. Control of DC motor is not easy.

    The Stepper motor is a  brushless Motor, but the direct current motor contains brushes which cause problems such as wear and tear and sparks.

    The motion of the stepper motor is incremental, and resolution is limited to the size of the step. DC motor has a continuous displacement and can be controlled accurately and positioned exactly.

    Feedback control with DC motor gives a much faster response time as compared to that of the stepper motor.

    The stepper motor can be slipped and gets out of control if overloaded and the error cannot be detected easily, whereas in DC motor the relays and overload protecting devices come into at the time of overloading and protect the motor from any damage.