1、 毕 业 论 文（设 计） 2010 届 电气工程及其自动化 专业 班级 题 目 两相混合式步进电动机驱动控制系统设计 二一二 年 五 月 二十五 日 II 摘摘 要要 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。 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
2、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。 关键词： 2 相混合式步进电动机，非线性动态模型，单片机，细分控制 Abstract This disserta
3、tion is about a fundamental research that solve the problem of desynchronizing, 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. According to the character, the paper uses dual bridg
4、e driving control technology. Through analyzing and establishing the subdivision 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
5、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.
6、 At the same time, using key- board to input the speed and output by LED, which is taken by chip 8279.In the other way, we use pronunciation chip ISD1420 to report the current steep. At last, a whole test for 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. Key Words:
