文档介绍：: .
摘 要
本文源于解决步进电动机的失步问题。论文在了解步进电动机的特点及工作原理的基础上，重点研究两相步进电动机的单片机控制技术。
本文分析了两相混合式步进电动机的结构和工作原理，建立了两相混合式步进电动机非线性动态模型，给出了绕组的磁链方程、旋转电压方程、转子运动方程和传递函数的表达式。
根据两相混合式步进电动机的驱动控制特点，本文采用了双极性驱动方式，通过脉冲分配合理控制绕组中的电流保证步进电动机内部合成磁场的幅值恒定，合成磁场的角度均匀，并在此基础上设计了一种两相混合式步进电动机驱动器。
该驱动器以单片机8098为控制核心，选用PBL3717、H桥驱动器件等构成驱动电路，论文从驱动技术方案、硬件电路、控制软件设计方面进行了详细地描述。在反馈检测电路设计时，采用光电编码器来进行步进电动机的转速。通过8279扩展键盘显示电路来显示电动机的转速和给定速度；另外利用ISD1420语音芯片实现语音报速功能。
最后对所设计的两相混合式步进电动机驱动器进行了性能测试分析，结果表明：该驱动器达到了系统设计前所提出的各项指标。系统运行安全、可靠、稳定。整个系统电路简单实用、性能优良、通用性强。设计原则适用于各种步进电动机，有一定的实用价值。
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关键词：两相混合式步进电动机；非线性动态模型；单片机；H桥驱动器
Design of Control System for stepper motor
based on single chip
Abstract
This dissertation is about a fundamental research that solve the problem of desynchroniz- ing, Based on the characteristics and the work principle of stepping motor, the paper emphasizes the control technology of stepping motor which controlled by the 8098 SCM.
The article analyzes the structure and the work principle of 2-phase hybrid stepping motor, establishes a nonlinear dynamic model, and also presents the expression of the winding flux linkage equation, rotation voltage equation, the rotor equation of motion and the transfer function.
According to the character, the paper uses dual bridge driving control technology. Through analyzing and establishing the subdivis-ion model, this paper controls the winding current reasonably, and guarantees constant magnetic field value, even angle. A new driver for 2-phase stepping motor is designed.
The driver takes single chip 8098 as the control core, selects BPL3717 and H-bridge as the driver circuit. The paper discusses the technology of driver, the hardware and software designing in detail .In order to design the feedback of the current and speed of 2-phase hybrid stepping motor, using speed monitor to detect the speed of stepping motor