Hybrid Stepper Motor Driver Circuit

A stepper motor is a digital version of the electric motor.

Hybrid stepper motor driver circuit. Now as shown in the circuit diagram the 555 circuit here is to generate clock or the square wave. To overcome the inductance and switch the windings quickly one must increase the drive voltage. In this project we have designed a simple 12v stepper motor driver circuit using 555 timer ic acting as a controller a cd4017 decade counter acting as the driver along with few other components. The frequency of clock generation in this case cannot be kept constant so we need to get variable speed for the stepper motor.

Stepper motor performance is strongly dependent on the driver circuit. The figure shows the circuit diagram of two stage stepper motor driver. Stepper motor vs servo motor. A stepper motor can operate in many modes like full step wave drive or half stepping please refer the article on stepper motor for the sequence of steps.

When stopped but energized a stepper short for stepper motor holds its load steady with a holding torque. Stepper motor driver circuit diagram and explanation. The widespread acceptance of the stepper motor within the last two decades was. Torque curves may be extended to greater speeds if the stator poles can be reversed more quickly the limiting factor being a combination of the winding inductance.

The phase current builds up at the rate decided by the phase winding s electrical time constant. Drive circuits for stepper motor. A drive circuits for stepper motor is usually driven from a low voltage dc source. The rotor moves in discrete steps as commanded rather than rotating continuously like a conventional motor.