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The induction motor stator-flux-oriented vector control scheme not only reduces the big dependence of its performances on the rotor parameters, such as in the rotor-flux-oriented vector control, but also eliminates the torque ripple produced by Bang-Bang control in Direct Torque Control. So the SFO vector control is a high-performance and robust induction motor control scheme.

异步电机按定子磁场定向的矢量控制克服了按转子磁场定向的矢量控制系统对转子参数的依赖性,又没有直接转矩控制中的砰—砰控制带来的转矩脉动,是一种鲁棒性良好的高性能异步电机控制策略。

Since DTC is a newly developed method, recently it is an important and challenging area in the field of AC drives. In this thesis, attention is focused on DTC of squirrel cage motors and electric vehicles driven by AC motors.

DTC作为近年来发展的一种新型的控制技术,成为了交流电机控制领域的研究热点,本文的研究就是针对鼠笼电机转矩控制以及电动车驱动控制的技术而系统地展开的。

In allusion to these difficulties, in the process of researching and developing Lifan320 EV, technicians will attach importance to overcoming small EV unit and the structure of driving system and the optimizing match of parameters; high-performance brushless permanent-magnet motor and the design and industrializing of controller; long life-span triphylite batteries with high-speed charging and discharging and research and industrializing of management system; research of motor, automatic clutch and two-gear transmission; key techniques such as strong power techniques, EMC techniques and whole unit test.

针对这些难点问题,在力帆320的研发过程中,技术人员将重点攻克小型纯电动汽车整车及驱动系统的结构及参数的优化匹配;高性能永磁无刷电机及控制器的设计及产业化;可快速充放电型、长寿命磷酸铁锂电池组及管理系统的研发及产业化;电机、自动离合器及两挡变速器一体化驱动系统的研发;强电安全技术、电磁兼容技术、整车试验等关键技术。

One straight line guide and silk pole flat network of transmission gush out black to make network device, by shower nozzle, shower nozzle shelf, air cylinder, person who lead sharply, base, job mesa and electrical machinery, pole of silk and pole of silk make up, its characterisitic is that: Both ends, with locating an air cylinder of bottom base of shower nozzle to be linked to through a connecting rod of the stated shower nozzle shelf, make up and lift the organization pneumatically; And this shower nozzle sets of base underpart set up first group along the longitudinal straight line guide package that arranged of the base again, two straight line guide package shower nozzle sets of base department of position set up and link with this shower nozzle of a bases, and can promote its ball silk pole moved along longitudinal time of the base; The end head of this ball silk pole is connecting the electrical machinery of urging.

一种直线导轨和丝杆传动的平网喷墨制网装置,由喷头、喷头架、气缸、直线导机、基座、工作台面及丝杆和丝杆电机组成,其特征在于:所述喷头架的两端通过一连杆与设于喷头架底座下部的气缸相连,组成气动抬升机构;而该喷头架底座下部又设置着一组沿基座纵向排布的直线导轨组件,两直线导轨组件中间部位的喷头架底座部设置与该喷头架底座相连,并能推动其沿基座纵向来回移动的滚珠丝杆;该滚珠丝杆的端头连接着驱动电机。

Focusing on some disadvantages in standard BP algorithm, such as low convergence rate, easily falling into local minimum point and weak global search capability, Genetic algorithm is used to optimal the connection weight of BP Algorithm in this paper, and construct a GA-BP algorithm of evolutionary neural network, and the algorithm is applied to the control of BLDCM speed adjusting system.

针对标准BP算法存在全局搜索能力弱和易陷入局部极小点等缺点,本文将遗传算法与BP神经网络相结合,构造了一种新的进化神经网络GA-BP算法,并将该算法应用于无刷直流电机调速系统的控制,仿真结果表明,与传统的PI控制系统相比,该算法得出的电机控制曲线几乎无超调,与基于BP算法的速度控制系统相比较,具有收敛速度快、不易陷入局部极小的优点。

In view of this fault features discussed judgment is that the main motor brake problems more likely, as a result, and then by careful observation, he finally found Braker friction wheel in closing the gap between the time of separation are uneven, there was a slight touch of local sweep/ to the corresponding axis on the spindle motor, which enables some resistance.

鉴于这一障碍特点,笔者开端鉴定是宾电机制动器呈现题目的不定性较大,于是,再通功不苛的查察,毕竟发掘制动器上的摩擦轮在呼分别离时的间隙有不平均不梢体,部分有惨重碰擦到对应的轴轮上,这样使电机宾轴爆发必定的阻力。

Screw on the choice of friction loss, high efficiency, high precision, long life of the ball screw, the electrical selected stepper motor, motor and the ball screw with gear deceleration.The main to modify the lathe is to modify the portrait, horizontal enter to the system in the Whole modification process and choose the automatic knife rest and be processed the thread need by pulser. The whole control system with the CPU of JKW-15T is to control the machine for center, through a plait distance drive tool machine an equipments to carry on control to attain need of process degree.

整个改造过程主要对车床纵、横向进给系统进行改造,丝杠选用摩擦损失小,效率高,精度高,寿命长的滚珠丝杠,电机选用步进电机,电动机与滚珠丝杠用齿轮减速;刀架改造成能自动换刀的回转刀架,由脉冲发生器来加工所需要的螺纹;整个控制系统以JKW-15T型号的单片机为中心,通过编程对机床的驱动设备进行控制以达到所需要的加工程度。

Using the maquettes of leading Beijing devleopment projects such as SOHO China as her backdrop, she creates dramatic images such as two cars colliding on the highway and where a tiny lady -in-red waves, as if to summon the police.

他的新作最主要的特征是,杨千用机械性的感应器和电机来控制作品的视觉观赏节奏,即当观众靠近画面的时候,感应器感应到人的存在,于是就启动电机让画动起来。

The invention discloses an organic compost turner, which consists of a turning part and a walking chassis. The walking chassis includes a chassis frame, a power part, a power transmission device, and a walking wheel. The invention is characterized in that: the turning part, arranged above the walking chassis, includes a motor frame, a major motor arranged on the frame, a transmission mechanism, and two horizontal scraper conveying chain mechanisms arranged symmetrically. The front end of the motor frame is arranged on the chassis frame of the walking chassis. The master motor drives the two horizontal scraper conveying chain mechanisms through the transmission mechanism. Scrapers of the two scraper conveying chain mechanisms move from the external side to the internal side at the front end of the turning part separately.

本发明公开了一种有机堆肥翻抛机,该机由翻抛部件和行走底盘组成,所述行走底盘包括底盘架、动力部件、动力传动装置和行走轮,其特征在于:所述翻抛部件设置在行走底盘的上方,其包括机架和安装在机架上的主电机、传动机构及对称设置的两个卧式刮板输送链机构,所述机架前端向下倾斜安装在行走底盘的底盘架上,所述主电机通过传动机构驱动两个卧式刮板输送链机构,两个刮板输送链机构的刮板分别在翻抛部件的前端从外侧向内侧运动。

This paper studies the design method of the magnetic transmission system of magnetic drive pump.

本文研究了磁力传动泵磁力系统的设计方法,借助有限元分析软件ANSYS的强大电磁分析功能对影响磁性能的主要结构因数作了计算分析;设计了磁力泵传动的结构;对磁力泵的关键部件之一密封罩用ANSYS做了强度校核;为了防止在电机启动时,磁力泵发生失速现象,本文提出了异步电机驱动磁力泵的simulink仿真模型,并对本文设计的磁力泵进行了初步仿真。

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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

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