Research & Development Of Driver And Control System For Two-Phase Hybird Stepping Motor

Based on analyzing the characteristics and the work principle of stepping motor,the paper emphasizes the drive and control technology of stepping motor.According to the character,the paper uses the control technology,which is based on current tracing,to control the exciting winding current and to produce rounded and even inner complex magnet field.The value of complex magnet field vector decides the value of motor torque;the neighboring two complex magnet field vectors decide the value of step angle.Through analyzing and establishing the subdivision model,this paper controls the winding current reasonably,and guarantees constant magnetic field value,even angle.A PWM subdivision driver for 2-phase stepping motor is designed.The driver takes Single Chip as the control core,selects DAC and the H-bridge as the diver circuit.The paper discusses the technology of driver,the hardware and software designing in detail.Using PWM subdivision control technology,the motor operates smoothly,the operation precision is increased and the torque is constant.The range of subdivision can be regulated by changing the current waveform value in the memory.A last,a performance test for the driver is made.The experiment result indicates that this driver reaches the qualities required.The system runs smoothly and safety.The circuit is simple,and has a good performance.The design principle fits many kinds of stepping motor,and has a good practical value.