Five phase hybrid stepping motor microstepping control

Abstract

Single stepping a motor results in jerky movements of the motor, especially at lower speeds. Microstepping is used to achieve increased step resolution and smoother transitions between steps. In most applications, microstepping increases system performance while limiting noise and resonance problems. The paper presents a method for calculation the values of the phase currents for microstepping control of a 5 – phase hybrid stepping motor. This method uses the standard control of the stepping motor with rated currents and only during the commutation the currents of the switched phases change their values in small steps so as the natural step is divided into several micro – steps. The authors have developed a mathematical model and computer programs for simulation of the motor operation under investigated microstepping control. The paper contains also the results from simulations and corresponding conclusions.

Keywords

• hibrid stepping motor
• simulation
• microstepping control
• PWM
• phase currents waveforms