H型双极式PWM直流调速系统设计.docVIP

控制系统课程设计 设计题目：H型双极式PWM直流调速系统设计 河北理工大学 本科生课程设计成绩总评表 学生姓名 设计总成绩 设计题目 H型双极式PWM直流调速系统设计 说明书评定成绩 答辩成绩 答 辩 时 需 要 设 计 人 回 答 的 问 题 注：设计总成绩=说明书评定成绩（60%）＋答辩成绩（40%） 设计任务书 (一)性能指标要求： 稳态指标：系统无静差 动态指标：；空载起动到额定转速时。 (二)给定电机及系统参数： PN = 220W , UN = 48V , IN =3.7A ,，nN = 200r/min ，Ra = 6.5Ω 电枢回路总电阻R =8Ω 电枢回路总电感L = 120mH 电机飞轮惯量GD2 = 1.29Nm2 (三)设计步骤及说明书要求： 1 画出系统结构图，并简要说明工作原理。 2 根据给定电机参数，设计整流变压器，并计算变压器容量及副边电压值;选 择整流二极管及开关管的参数，并确定过流、过压保护元件参数。 3分析PWM变换器，脉宽调制器（UPW）及逻辑延时（DLD）工作原理。 4 设计ACR、ASR并满足给定性能指标要求。 5 完成说明书，对构成系统的各环节分析时，应先画出本环节原理图，对照分析。 6打印说明书（A4），打印电气原理图（A4）。 目录 一 引言···············································1 二 系统构成和原理···································1 三 PWM主电路设计····································3 四 电流调节器和转速调节器的设计····················4 4.1 电流调节器ACR的设计·································4 4.2转速调节器ASR设计····································4 4.2.1电流环等效闭环传递函数····························7 4.2.2转速调节器结构的选择······························8 4.2.3时间常数的确定····································8 4.2.4转速调节器参数的选择······························8 4.2.5校验近似条件······································8 4.2.6校核转速超调量····································8 4.2.7转速调节器的实现··································9 五 基于SG3525 为核心构成的控制电路··················9 5.1 SG3525芯片的内部结构及工作原理························9 5.2逻辑延时环节···········································10 六 驱动电路设计········································11 七 电流反馈和转速反馈电路设计························12 7.1电流反馈电路设计·······································12 7.2转速反馈电路设计········································13 八 结束语·················································13 九 参考文献···············································15 十 总电路图…………………………………………………… 16 1引言 直流电动机由于有着广泛的起制动性能，宜于在广泛范围内平滑调速，且直流拖动系统在理论上和实践上都比较成熟，因而目前应用广泛。直流电机在一定范围内无极平滑调速系统来说，以调节电枢电压的方式最好。直流PWM调速系统作为一种新技术，发展迅速，应用日益广泛，特别在中、小容量的系统中，已取代V-M系统成为主要的直流调速方式。脉宽调速实质上是调压调速方式中的一种，它采用