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Digital control of PM brushless DC machines in generating mode.

机译：发电模式下的PM无刷直流电机的数字控制。

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摘要

A significant increase in distributed generating system technologies in the past decade has stimulated the development of electrical drives with brushless DC machines (BLDC). Conventional control of such drives is mainly examined and well known for applications where BLDC is working in motoring mode. BLDC drives are widely used due to their high efficiency, high power density, simple construction and low maintenance. With advancements in power electronics, the control of BLDC machines becomes more flexible for variety of applications. However, control of BLDC drives in generating mode and four-quadrant operation has not been examined thoroughly despite the fact that such machines have very high power density and field weakening capability compared to other electrical machines (brushed DC as well as asynchronous and synchronous machines). Furthermore, the main challenge in generating mode applications is to keep a wide operating range for variable shaft speeds. Conventional control algorithms that are used to control BLDC drives in generating mode have complex control routines and are not fault tolerant. As a result, control hardware of variable speed generators is quite complex and costly.;This dissertation shows the fundamentals of BLDC drives, operating principles, conventional control and dynamic operations. It also proposes a novel digital control concept for BLDC drives, as a trouble-free control principle, explaining the theory behind it and its simple implementation. Two different digital control approaches are presented: hysteresis and pulse-width modulation (PWM). In addition, an adaptive control algorithm is introduced, which increases the reliability of the system and enables fault tolerant operation for a wide speed range. Such adaptive strategy adjusts the control parameters to the load; therefore, for each load variation, it modifies its parameters in order to the find optimum operating point. This results in a broader operating range of the machine, using a simple and easy to implement control strategy. The direct benefit is that such control strategy can either be part of an existing algorithm or can be implemented in FPGA. Target applications for digital control of BLDC drives include propulsion systems, wind turbines, hydro turbines and aerospace and naval systems.
机译：在过去的十年中，分布式发电系统技术的显着增长刺激了无刷直流电机（BLDC）电气驱动的发展。对于BLDC以电动模式工作的应用，通常会检查这种驱动器的常规控制，并对其进行熟知。 BLDC驱动器因其高效率，高功率密度，简单结构和低维护而被广泛使用。随着电力电子技术的进步，BLDC机器的控制变得更加灵活，可适用于各种应用。但是，尽管与其他电机（有刷直流以及异步和同步电机）相比，此类电机具有很高的功率密度和弱磁能力，但尚未对发电模式和四象限运行中的BLDC驱动器的控制进行彻底检查。 。此外，在发电模式应用中的主要挑战是在可变轴速下保持较宽的工作范围。用于以发电方式控制BLDC驱动器的常规控制算法具有复杂的控制例程，并且不具有容错能力。因此，变速发电机的控制硬件十分复杂且成本高昂。本论文展示了BLDC驱动器的基本原理，工作原理，常规控制和动态操作。它还提出了一种新颖的BLDC驱动器数字控制概念，作为一种无故障的控制原理，解释了其背后的理论及其简单实现。提出了两种不同的数字控制方法：磁滞和脉冲宽度调制（PWM）。此外，还引入了自适应控制算法，该算法可提高系统的可靠性，并能在较宽的速度范围内实现容错操作。这种自适应策略根据负载调整控制参数。因此，对于每个负载变化，它都会修改其参数以找到最佳工作点。通过使用简单易行的控制策略，可以扩大机器的运行范围。直接的好处是，这种控制策略可以是现有算法的一部分，也可以在FPGA中实现。 BLDC驱动器数字控制的目标应用包括推进系统，风力涡轮机，水力涡轮机以及航空航天和海军系统。

著录项

  • 作者

    Milivojevic, Nikola.;

  • 作者单位

    Illinois Institute of Technology.;

  • 授予单位 Illinois Institute of Technology.;
  • 学科 Engineering Computer.;Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2010
  • 页码 144 p.
  • 总页数 144
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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