脉冲电流源型步进电机驱动器的研究

Research of the stepping motor driver with switch constancy current source

为克服步进电机在高频下负载能力下降的问题提出了步进电机驱动器的一种新的形式——电流源驱动器。电流源驱动器比常见的直流开环电压斩波驱动器具有很多明显的优越性： 它改善了步进电机的负载特性，大幅度提高了步进电机的高频特性，可以充分发挥出步进电机的性能潜力； 并且性能优越，控制简单。它不仅能够有效地利用能量，而且由于它的恒流特性，使得这种电路有良好的适应性和自保护能力，同时又大大降低了驱动电路对于驱动电源提出的电压精度要求，简化了系统设计。文章简要比较了几种常用的步进电机驱动器的优劣，然后详细分析了电流源驱动器的原理及构成方式，给出了功率器件门极驱动信号的逻辑原理及实现方法。

This article discussed a new stepping motor driver, constancy current source driver. The driver has more obvious benefits than the common direct current open link switch voltage one. It improves a motor driver's load property and high frequency property. It can fully improve the potency of stepping motors, and has superior performance and easilty control properties. Not only can it utilize energy availably, but due to its constancy current property, it has nice adaption and self protection ability. It can also reduce the demand in designing a motor drive power. The article concisely compares the advantages of several different stepping motor drivers. After that, it particularly analyzed the principium and construction of constancy current source driver. It also elaborates the logical principium and realization of power electric gate signal. At same time, it gives a concrete design idea about power electric driving.