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The Series are the newly products with premium efficiency, The whole range motors efficiency are designed and manufactured according to America NEMA Premium Efficiency Standard, The efficiency is much higher tnan of NEMA Standard Epact high-efficiency motors.

NEP系列高效率三相异步电动机是全新设计的超高效率电动机,整个系列的效率是按美国NEMA超高效率标准进行设计的,整个系列的电动机效率高于NEMA标准的Epact高效电机的效率。

is applied to construct the three-dimension model for finite element analysis. Short circuit and open circuit of the field winding and the teeth and slots structure of the rotor are discussed. An appropriate three-dimensional mesh is made. The corner point problem of conductor is eliminated. Furthermore, a new memory structure for sparse complex matrix and a PCCG method based on it are introduced to save memory and computation time.

在汽轮发电机失磁异步运行转子三维涡流场数值计算模型中,应用了〓法建立了三维有限元计算模型,考虑了转子绕组的开、短路状态及转子齿槽结构,形成了合适的三维剖分网格,解决了三维电磁场有限元计算中角点奇异的问题,创立了一种新的稀疏矩阵的存储格式以及基于该格式的预处理复数共轭梯度法从而减少内存开销和加快了求解速度。

Using digital signal processor, TMS320F240, which is special for motor control, we develop a suit of speed adjustable, reliable and highly effective induction drive based on FOC principle.

文中对整个系统的硬件电路和驱动软件的实现都作了详细的介绍,同时采用了一种新型的PWM调制方法一电压空间矢量法来实现对异步电机的控制,提高了能量的利用效率。

Chapter 5, multi-thread technologies quicken the response velocity, improve the efficiency of CPU and ability of corresponding background tasks that make the controller having the ability of executing multi-tasks; asynchronism technology is utilized to develop high effective and haleness applications.

详细阐述了vxD的结构及设备驱动程序的设计方法。第五章论述了多线程技术,采用多线程和异步设计技术,加快了应用程序的响应速度,极大提高了CPU的利用率和协调后台任务的能力,使控制器具有多任务执行的能力。

Manual answering realizes both synchronization answering based on chatting online and asynchronization answering based on BBS.

人工答疑同时实现基于在线聊天的同步答疑和基于BBS论坛的异步答疑;智能答疑建立在答疑知识库的基础上,采用基于字符串最大正向匹配的中文分词算法实现用户基于自然语言提问的自动答疑;联合答疑基于JMS技术,实现网校间的资源共享。

When metastability occurs the clock-to-out time can be extended beyond the register's nominal tCO time. The additional time beyond the tCO time for the output signal to settle to a known state is known as the settling time. The tMET of a synchronization register chain is the sum of all output slacks of the registers in the chain.

对于这段话,我的理解是: tMET 时间和 tCO 时间之和就是异步时钟域的亚稳态时间,如果这个时间大于目的时钟域的同步寄存器链的时序余量(大概是时钟周期减去它的建立时间和保持时间之和吧),那么这时候系统采到的信号一定是亚稳态。

Based on a 5th-order model and the electromagnetic characteristics of an induction motor, we prove that the coefficient matrix is nonsingular, confirming the existence of the inverse decoupling control of stator flux and torque in any conditions.

本文从异步电动机的5阶模型及其固有的电磁特性出发,证明了其系数矩阵的非奇异性,进而结合逆系统理论证明定子磁链与电磁转矩的逆解耦在任何状态下都是存在的。

The realize method of ITC strategy in FSTP induction generation system is studied. In order to improve stable performance of FSTP induction generation system, SVM-ITC (ITC based on space vector modulation) is investigated. Creation method of reference voltage vector which includes change trend and magnitude information of flux link and torque is presented. Because there is no zero voltage vector in four-switch system, a method which employs opposite vector in equal time to replace zero voltage vector is proposed. Two vector modulation schemes are presented.

为提高容错型四开关三相异步发电系统的稳态性能,进行了基于空间矢量调制的瞬时转矩控制研究,提出了包含磁链与转矩变化趋势与大小信息的电压参考矢量生成方法;针对四开关系统无零电压矢量的情况,提出用等时间相反矢量来代替零电压矢量的作用,并给出了两种矢量调制方案。

Because of the slip speed will change when the voltage of VVVF is changed, so we can control the slip speed by controlling the outport voltage of VVVF, A saving energy method of main driven motor of CNC machine tool which running in the defferent state of load is introduced in the paper .This method is realized by optimizing the slip speed in the defferent load state based on the adaptive neural network.

根据电机的转差率的变化,通过调节变频器装置的输出电压来控制电机运行转差率,并基于神经网络模型参考自适应的控制算法实现了交流异步电动机在不同负荷下最优转差率的控制,从而达到电机在不同负载下的节能运行。

The main features of the system are: the communications line is not only used for data transmission but also responsible for the system control and management; only one analogue to digital converter is needed for the whole system; a digital trimmer which is analogous to the adjustable resister in function is installed to each sub—system.

本文所进行的数字型条干均匀度测试仪的系统设计,采用了多微处理器的分布式并行结构,提出了一种数字信号的总线结构,采取了数据预处理和数字微调等措施,其主要特点为:半双工异步通信线不但用于数据传输,而且还负责系统的控制和管理;整个系统只需一路模数转换器;各子系统均设有数字微调装置,其功能类似于模拟电路中的电位器,可独立进行参数调整。

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