基于SOPC技术的步进电动机细分控制器设计

Design of Stepper Motor Subdivided Controller Based on SOPC Technique

细分驱动技术是解决步进电动机在低速运行状态下转矩脉动、振荡、噪声等缺点的有效手段。设计了一种基于片上可编程系统SOPC(system on a programmable chip)技术的混合式步进电动机细分控制器。以FPGA为载体,以Nios Ⅱ软核为中央处理单元,以细分功能模块为片上外围设备,构建了完整的片上系统。配合步进电动机专用驱动芯片,实现了步进电动机的细分驱动。实验结果表明该设计有效提高了步进电动机在低速状态下的运行性能。

Subdivided drive technique is an effective means to solve torque ripple, vibration, noise and other shortcomings at low speed in stepper motor. A hybrid stepping motor subdivided controller based on SOPC （ System on a Programmable Chip） technology was designed. Taking the FPGA as a carrier,the Nios II soft-core as the central processing unit, the subdivision function block as the on-chip peripherals, a complete system was constructed on a chip. Combined with the ded- icated stepper motor driver ICs, the subdivided drive technology was realized. Experimental results show that the design effectively improves the performance of the stepper motor in the state of low speed.