单相调压电路

电力电子技术课程设计说明书

单相交流调压电路

系部：电气与信息工程学院

学生姓名：

指导教师：肖文英职称副教授

专业：电气工程及其自动化

班级：电气本1105班

完成时间：2014年5月20

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可以了。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。

本次试验的题目是单相交流调压电路的设计，主要是设计出主电路和触发电路，通过触发电路触发主电路中的反并联的晶闸管来控制负载电压电流。触发电路产生的触发脉冲的延迟角也是可以调节的，通过对它的调节来达到对输出控制的目的。在MATLAB中连接好总电路图，用示波器观察输出结果，直接方便。MATLAB这一功能强大的软件给我们带来了很多方便，让我们对于设计电路的结果分析更加清楚明确。

关键词：交流；调压；电动机调速；电力系统；变压器；示波器

ABSTRACT

AC voltage regulation circuit is widely used in lighting control (such as dimmer and stage lighting control) and asynchronous motor soft start, also for adjustable speed asynchronous motor. In power system, the circuit is also often used forcontinuous adjustment of the wattless power. In addition, in the high voltage and low current or low voltage and high current DC power supply, often using AC voltage regulating transformer voltage regulating circuit. In these power such as using thyristor phase controlled rectifier circuit, high voltage and low currentcontrolled DC power supply needs many thyristor series; similarly, low voltage and high current DC power needs many thyristor parallel. This is veryunreasonable. The AC voltage regulation circuit on the primary side of atransformer voltage regulation are moderate, its voltage, current value, in the twoside of the transformer can be used as long as the diode rectifier. The size of a circuit is such a small, low cost, easy to design and manufacture. Single phaseAC voltage regulation circuit of single-phase AC voltage regulating circuit. Used in electric heating system, AC motor speed control, lighting control and AC stabilizer etc.. With self coupling transformer voltage regulating method, AC voltage regulation circuit of simple control, fast regulating speed, device, light weight and small size,less consumption of non-ferrous metals. The test of the topic is to design a single-phase AC voltage regulation circuit, is the design of main circuit and trigger circuit, to control the load voltage and current through the thyristor trigger circuit to trigger parallel reverse in the main circuit of the tube. The trigger circuit produces a trigger pulse delay angle isadjustable, adjust it to output control purposes. Connect the total circuit in MATLAB, observe the output using the oscilloscope, direct and convenient.Software MATLAB this powerful brings us a lot of convenience, let us for the design of circuit analysis results more clearly.

Keywords: alternating current; voltage; motor; power system; transformer;oscilloscope