| 1. | The development and situation of variable frequency drive technology
变频调速技术的现状与应用 |
| 2. | Variable frequency drive of the blower for wood dust combustion furnace
旋风式木粉燃烧鼓风机变频技术改造 |
| 3. | The fault detection and diagnosis for ac variable frequency drives is studied systematically in this dissertation
本文研究了电动机变频调速系统的故障检测与诊断问题。 |
| 4. | By using the special control algorithm of variable frequency drive system , the above said problem is solved
设计了基于变频驱动系统的专用控制算法来解决“倒发电”问题。 |
| 5. | Providing innovative water and wastewater treatment solutions as well as variable frequency drive pumping and control packages , in central california
-从事城市给水处理市政污水处理工业给水废水处理和固体废弃物处理。 |
| 6. | Based on existing research results , this dissertation first presents a new fault detect and diagnosis method for ac variable frequency drives based on signal processing
本文在现有研究的基础上，就基于信号处理的电动机变频调速系统的故障检测及诊断方法进行了深入研究。 |
| 7. | Analyzing the performance curves of pumps and network in a variable flow pumping system , concluding the influence factors of energy saving and the optimal ranges of variable frequency drive ( vfd )
摘要通过分析变频水泵及管网系统在变工况下的特性曲线，得出影响水泵变频节能效果的主要因素和变频调速的适用范围。 |
| 8. | The concept of the basic spectral residual is presented , a detection decision function is constructed and a simple strategy for fault detection is provided . this provide a valid way to detect the faults occurred in the variable frequency drives . 4
提出了基本谱残差概念，定义了决策函数，给出了一种简单的故障决策策略，为电动机变频调速系统的故障检测或状态监控提供了一种有效途径。 |
| 9. | With the development of ac variable frequency drives and its widely application in industry , the reliability of the variable - speed drive system has been considered much more than ever . a great deal of research effort has been and being spent on the fault detection and diagnosis of the drive system
随着电动机变频调速系统在工业应用中地广泛使用，调速系统的可靠性问题愈益引起人们的重视，调速系统的故障检测与诊断问题已逐渐引起众多研究者的关注。 |
| 10. | Firstly , the control functions of high - voltage variable frequency drive system and multilevel inverters and the demands of this monitoring system are analy z e d . the thoughts of hardware design , the whole structure and the function of each hardware module are introduced respectively in this paper
论文首先从监控系统的设计要求入手，着重分析了高压变频驱动系统和多电平变频器控制的要求和功能，阐述了监控系统的硬件设计的思路，构建出系统的整体结构，并分别介绍了系统各个硬件模块的功能。 |
