【摘要】 文章提出了一种结构简单的用于两相制步进电机的控制驱动器的设计。该控制驱动器由L297步进电机控制芯片与功率驱动电路组成。L297芯片产生脉宽可调的脉冲相序信号,该信号作为双极性桥式功率驱动电路的输入信号,放大后驱动步进电机。文中介绍了L297芯片与双极性桥式电路的设计原理。该步进电机驱动器在微机数控机床中已成功应用。更多还原

【Abstract】 This article introduces a control-driver used for quarter-phase stepper motor. The driver consists of the L297 stepper motor control chip and the power-driven circuit.L297 chip generates pulse phase sequence signals of which the pulse width is adjustable.The signals are the input ones of dual bridge driving circuit and drive the stepper motor after amplification.In this article,the design principle of L297 chip and dual bridge driving circuit is stated.The driver is used for NC machine tool successfully.更多还原