Hybrid Stepper Motor Driver Circuit

When a phase is to be energised the dc source is connected to the phase by a semiconductor switch s fig.

Hybrid stepper motor driver circuit.

The phase current builds up at the rate decided by the phase winding s electrical time constant. Stepper motor driver circuit diagram and explanation. Stepper motor performance is strongly dependent on the driver circuit. A drive circuits for stepper motor is usually driven from a low voltage dc source.

The widespread acceptance of the stepper motor within the last two decades was. When stopped but energized a stepper short for stepper motor holds its load steady with a holding torque. 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. Stepper motor vs servo motor.

A stepper motor driver is a circuit that takes the pulse signals from a controller and converts them in to stepper motor motion. 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 figure shows the circuit diagram of two stage stepper motor driver.

The rotor moves in discrete steps as commanded rather than rotating continuously like a conventional motor. Drive circuits for stepper motor. The frequency of clock generation in this case cannot be kept constant so we need to get variable speed for the stepper motor. Now as shown in the circuit diagram the 555 circuit here is to generate clock or the square wave.