查询词典 ac

On the basis of a general ac drive, the second method doesn't require additional sensors. According to the torque command and the speed performance during the initial state of an ac drive or using a mode selection, the rotor time constant is tuned and identified.

在不增加额外的感测器，建立在一般伺服驱动器下；第二种方法在驱动器起动时或利用模式的选择，根据给予的扭矩命令和所得速度响应关系而判断调整得适当之时间常数。

The high-voltage high-power multilevel converter and AC motors drive techniques are summarized compendiously for domestic and overseas studies in the prolegomenon of this dissertation. The evolution and research status of multilevel converter topologies are analyzed, the development of AC variable speed techniques and the characteristic of DTC are discussed, also, the aim and significance for the research are demonstrated. In this dissertation, SVPWM pattern and implement method have been addressed comprehensively for three-level NPC inverter.

本文绪论部分针对国内外高压大容量多电平变换技术和交流传动控制技术作了简要综述，着重分析了多电平拓扑结构的发展和研究现状，讨论了交流调速的发展和直接转矩控制技术的特点，指出本文选题的目的和意义。

We use a 1/2 Hp TECO ac induction motor to complete experiment. Simulation and experimental results are consistence, it shows the accuracy of simplified model. The researchful results can become prototype machine of universal ac induction motor drive.

实验是以一颗1/2Hp东元鼠笼式交流感应马达来进行，实验与模拟结果具有相当的一致性，表示模型建立的正确性；研究结果显示其研制的系统具有未来泛用型交流感应马达驱动器的雏型。

AC-DC-AC dirve technique. due to the obvious advantages of its application in locomotives andmotor coach,has been widely used in the railways all over the world since 1970s. This has become a tendency.

交－直－交传动技术应用于机车动车具有明显的优点，70年代以来被世界各国铁路广泛采用，已形成一种趋势。

Chapter 2 introduces the basic theories of AC = BD and pseudo-differential division with remainder, as well as the construction of exact solutions of differential equations under the instruction of the theory of AC = BD.

第二章介绍本文的理论基础：AC=BD理论和微分伪带余除法，并且阐述在AC=BD这一理论框架下的微分方程精确解的构造问题。

In this research, we report the development and experimental results of a single cell electroporation lab chip via the integration of dielectrophoresis manipulation and AC electrokinetic pump. Both dielectrophoresis force and AC electrokinetics pump are incorporated in this micro-chip for the target of single cell electroporation.

在这篇论文研究中，我们设计一利用介电泳力(Dielectrophoresis， DEP)达到细胞操控并且整合交流电动式微帮浦之微生医实验室晶片，提供单一细胞电穿透的生医应用。

The design of Brushless synchronous AC generator constitute of the main generator AC excitor revolve selenium rectifier and so on.

无刷同步发电机主要由主发电机、交流励磁机、旋转整流器组成。

On the case of 0.1 to 0.7MPa of unit pressure, The two methods of LVDT and extensimeter are used on two kinds of basic asphalt mixture AC-16I and AC-20I for testing their compression module, asphalt mixture compression module is tested in the different temperature, the results indicated that extensimeter is better than LVDT because of its accuracy.

对常见的两种沥青混合料AC-16I、AC-20I在0.1~0.7MPa下，用"顶面法"与"侧面法"两种方法进行测试，顶面法中又采用了机架位移和LVDT两种方法。

This paper research topic project is needs to develop facilely, reliable,output voltage stable green, easy to operate quick new AC-DC-AC inversion power source.

本研究课题项目就是要研制出轻便，可靠，输出电压稳定的、绿色的，使用方便快捷的新AC-DC-AC逆变电源。

With electronic controllers used occasionally on normal flourescent lights and usually on one-piece CFL's, extra circuitry is included which converts the 240V AC into DC, then back into AC but at a frequency of around 20 to 30 kHz (20,000 to 30,000 cycles per second), which usually eliminates any perceivable flicker.

在普通荧光灯中安装电子控制器，一般情况下通常在单管节能灯中安装这种电子控制器，并设计专门的电路用来将240V交流电转换为直流电，然后再转换成工频大约为20--30kHz（每秒钟20000到30000周期变化）的交流电。通常情况下，这种电灯能消除所有可视见的闪烁。

The receding calculations and experiment analyses in this subject are built on the blood cast of pig tongue.

本研究课题的前期工作是采用猪舌血管铸型模拟人舌而进行的数值计算与实验分析。

"Each human infection constitutes an opportunity for genetic modification of the virus through reassortment, mutation, or both...."

&每一次人类的感染都暗藏着一次基因修改的机会，无论是通过病毒的整合、突变或者兼而有之。。。。&