| Stepper motor is a kind of electromechanical component that is driven in step angle or displacement by electric pulse signal. Two-phase hybrid stepping motor has widely used in mechanical-electrical field .The performance of stepping motor depends on its driving method largely. This paper study and design the subdivided driver. The two-phase hybrid stepping motor system's performance is enhanced. Simulation and experiment proves its credibility.In this paper, the working principles of stepping motor and magnetic network of two-phase hybrid stepper motor are introduced, and the dynamic equation is deduced. Sine/cosine wave is confirmed as suitable current wave for subdivided driving. The subdivided driving method can control the current wave accurately and the system's performance is improved. When selecting the driving method, this paper uses frequency fixing PWM. Base on the principle, the main circuit and control circuit of 2-phase hybrid stepping motor systems are designed. The system can realize many functions such as fix-frequency pulse width modulation, current sampling, power magnifying, ring distribution, producing control signal, and so on. At last the control method in the subdivided driving are also studied detailed and analyzing the dead-time efforts, and bring forward a method that reducing the dead-time efforts.
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