单相交流调压电路的课程设计.doc

PAGE 29 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 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； 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; 目录 TO