摘要同步电机是一种常见的交流电机。它有着很多种用途，可以作为电动机使用，也可用作发电机或补偿机。这一种拖动系统具有效率高、调节方便、容量大、体积小、调节方便、耐压能力等优点，在各个恶劣环境中有着应用。无刷励磁同步发电机发电机的转子绕组采用交流励磁机以及旋转整流装置直接提供励磁电流，不使用电刷以及滑环，这样相互接触时就不会产生火花。无刷励磁方式的特点是没有滑环和碳刷，人工维护工作简单，具有更高的可靠性，能够长时间连续运行，在各种无人管理的电站中使用广泛；由于不需要使用旋转电刷输入励磁电流，因此也不会产生磨损，所以也特别适用于各种各样的恶劣环境条件下运行；因为该电机属于他励式同步发电机，也容易实现并联运行。与此同时，也使得电机的使用寿命得到了很大的提高，使这一励磁系统变得更加可靠同时维护起来成本也会降低。在大容量的发电的机组中无刷励磁系统是非常常用的励磁方式之一。外部励磁电源的稳定性有很好的保障。75581

在电力电子技术快速发展的现在，无刷励磁的各个技术得到较大完善，无刷电机的应用得到了广泛普及。

本文以现如今电厂最常见的火电机组为模板，设计出了预期配套的无刷励磁系统，给出了这一系统的详细结构以及工作原理并进行了详细分析。选择合适的元件，以及设计出了配套的控制系统。

该论文共有图22幅，表4个，参考文献共18篇

毕业论文关键词：无刷励磁  同步电机  智能控制 

Abstract Synchronous motor is a kind of common AC motor。 It has many uses, can be used as a motor, can also be used as a generator or a compensator。 The drag system has the advantages of high efficiency, convenient adjustment, large capacity, small size, convenient adjustment, pressure resistance, etc。, and has the application in various harsh environments。 No rotor winding of the brushless excitation synchronous generator using AC exciter and rotating rectifier device directly provides excitation current, without the use of brush and slip ring, so in touch with each other when there will be no spark。 No brush excitation mode is no slip rings and carbon brushes, artificial maintenance work is simple and has high reliability, capable of running continuously for a long time, widely used in a variety of unmanned management of power plant; owing to no need of using a rotary brush input excitation current, so will not produce wear, so is particularly applicable run in a variety of harsh environmental conditions; because the motor to his excited synchronous generator, is also easy to realize the parallel operation。 At the same time, it also makes the service life of the motor has been greatly improved, so that the excitation system becomes more reliable at the same time to maintain the cost will be reduced。 The brushless excitation system is one of the most popular methods in large capacity generating units。 The stability of the external excitation power supply is very good。

With the rapid development of power electronic technology, the technology of brushless excitation is improved greatly, and the application of brushless motor has been widely popularized。

In this paper, the most common thermal power plant is now as a template, designed to match the expected brushless excitation system, gives the detailed structure of the system and the principle of work and a detailed analysis。 Select the appropriate components, as well as the design of a complete set of control system。

There are 22 figures, 4 tables and 18 references in this paper。

Key Words: Brushless excitation  Synchronous motor  intelligent control

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