【电】基谐电流
- The first is a limitation in the harmonic current that a user can transmit into the utility system.
第一个准则是限制用户可送入用电系统的谐波电流。 - The paper first gives a general introduction to the existing harmonic current detection algorithms, and points out their limitations concerning the real-time property and detection precision etc.
文章首先对目前存在的一些谐波电流检测算法进行了综述，通过分析比较，指出其在实时性，检测精度等应用方面的局限性。 - The first harmonic winding and harmonic winding no-load property curve are gained when field current is change.
通过改变励磁电流的大小，得到了基波绕组和三次谐波绕组的空载特性曲线。 - First, the widely used shunt-APF is selected to be the study object and the composition of APF control system is introduced, then methods of the two main parts& harmonic cur-rent detection and compensation current control are discussed.
首先以广泛使用的并联型有源电力滤波器为研究对象，介绍了有源电力滤波器控制系统的组成，并对其两个主要环节&谐波电流检测和补偿电流控制的方法进行了阐述。 - The main contents include: The first chapter introduces the background information of this study, including the generation of harmonic and its harm as well as current study achievement of APF.
主要内容包括：第一章介绍谐波产生和危害等研究背景以及有源电力滤波器当前的研究现状，并给出本文选题意义。 - For the design of the prototype, first the choice of slot and pole number combination is done from the winding factor, the cogging torque, harmonic of MMF, asymmetric radial magnetic pull force, fault-tolerant, eddy current losses and so on.
对于该样机的设计，首先从绕组因数、齿槽转矩、定子磁动势谐波、不对称径向磁拉力、容错能力和涡流损耗等方面介绍了极槽配合的选取。