单相交流调压电路的课程设计 - 图文

电力电子技术课程设计说明书

单相交流调压电路的设计

院 、 部： 电气与信息工程学院 学生姓名： 李啸龙 指导教师： 肖文英 职称 副教授 专 业： 自动化 班 级： 1101班 完成时间： 2014年5月

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摘要

交流调压电路广泛用于灯光控制（如调光灯和舞台灯光控制）及异步电动机的软启动，也用于异步电动机调速。在电力系统中，这种电路还常用于对无功功率的连续调节。此外，在高电压小电流或低电压大电流直流电源中，也常采用交流调压电路调节变压器一次电压。在这些电源中如采用晶闸管相控整流电路，高电压小电流可控直流电源就需要很多晶闸管串联；同样，低电压大电流直流电源需要很多晶闸管并联。这都是十分不合理的。采用交流调压电路在变压器一次侧调压，其电压、电流值都比较适中，在变压器二次侧只要用二极管整流就这样的电路体积小、成本低、易于设计制造。单相交流调压电路是对单相交流电的电压进行调节的电路。用在电热制、交流电动机速度控制、灯光控制和交流稳压器等合。与自耦变压器调压方法相比，交流调压电路控制简便，调节速度快，装置的重量轻、体积小，有色金属耗也少

关键词：交流；调压；电动机调速；电力系统；变压器；

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ABSTRACT

Ac voltage circuit is widely used in lighting control (such as dimmer and stage lighting control) and asynchronous motor, also used in the soft start-up induction motor drive. In the power system, the circuit is also often used to reactive power of continuous adjustment. In addition, in high voltage and low voltage, current, or small current dc power supply, often also adopt ac voltage transformer voltage regulating circuit. In these power such as using thyristor rectifier circuit control of high voltage, low current controlled dc power needs many thyristor series, Similarly, low voltage dc current needs many thyristor parallel. This is very reasonable. Adopt ac voltage transformer voltage circuit in the side, the voltage and current are moderate, as in transformer with diode rectifier side. This circuit, small volume, low cost, easy to design and manufacture.

Single-phase ac voltage circuit of single-phase ac voltage is to adjust the circuit. Used in electric heating system, ac motor speed control, lighting control and ac stabilizer etc. Since the voltage transformer with decoupling method, exchange regulating circuit control and speed regulation, the device, light weight, small size, non-ferrous metal consumption is less

Key words: communication; Voltage regulation; Motor drive; Power system; Transformer;

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目录

1 单相交流调压电路设计目的及务······························5 1．1设计目的··············································5

1.2设计要求及分析·······································5 1.3 设计方案选择········································5 2 单相交流调压主电路设计及分析······························5 2.1电阻负载···············································6 2.1.1建立模型仿真·······································6 2.1.2仿真参数设置·······································6

2.1.3结果分析··········································10 2.2阻负载感············································11 3 触发电路·················································16 4 保护电路·················································18 4.1保护电路设计········································18 4.2过电压的产生及过电压保护····························18 4.3晶闸管过电流保护····································19 5 总电路图·················································21 6 单相交流调压电路参数设定与计算···························21

6.1单相交流调压变流器参数设定··························21 6.2单相交流调压变流器电路分析··························21 6.3输出平均电压、电流及输出有功功率····················22 7 总结与体会···············································24 参考文献···················································25 致谢·······················································26 附录·······················································27

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1单相交流调压电路设计目的及任务

1.1设计目的

电力电子技术是专业技术基础课，做课程设计是为了让我们运用学过的电

路原理的知识，独立进行查找资料、选择方案、设计电路、撰写报告、制作电路等，进一步加深对变流电路基本原理的理解，提高运用基本技能的能力，为今后的学习和工作打下良好的基础，同时也锻炼了自己的实践能力。

1.2设计要求及分析：

设计一个单相交流调压电路，要求触发角为45度.反电势负载E=40伏，输入交流U2=210伏。分有LB和没有LB两种情况分析.L足够大，C足够大 (1) 单相交流调压主电路设计，原理说明；

(2) 触发电路设计，每个开关器件触发次序与相位分析； (3) 保护电路设计，过电流保护，过电压保护原理分析；

(4) 参数设定与计算(包括触发角的选择，输出平均电压，输出平均电流，输出有功功率计算，输出波形分析，器件额定参数确定等可自己添加分析的参数)； 由以上要求可知该系统设计可分为四个部分：交流调压主电路设计、触发电路设计、保护电路设计及相关计算和波形分析部分。下面分别做详细的介绍。

1.3 设计方案选择

本课程设计方法：采用两个普通晶闸管反向并联设计单相交流调压电路。

2．单相交流调压主电路设计及分析

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