电动机

The ship electric propulsion system that we are going to discuss consists of the following parts: six-phase double Y winding shifted by 30°synchronous motor, diode clamped three-level inverter, fixed pitch propeller and control installment of electric propulsion systems based on air-gap-field orientation vector control.

本论文所研究的船舶电力推进系统各个组成部分分别是：双Y移30°六相电励磁同步电动机、二极管嵌位式三电平逆变器、定距螺旋桨船舶推进器和采用基于气隙磁场定向矢量控制策略的电力推进系统控制装置。

Brush less DC motor is a new-model electric machine emerging rapidly in recent years. It is to widely used in industry 、agriculture military affair and so on .

摘 要：无刷直流电动机是近年迅速兴起的一种新型电机，它广泛应用与工业，农业，以及军事等领域。

Its merit of higher energy density results in its wide use in modern industry and electronic technology such as: loudspeakers, high performance steppers, DC′s, servos, linear motors, generators, magnetic resonance′s, magnetic separations, iron removers, magnetic suspension, computer ＆car parts, communication equipment, machine meters, wax ＆ leakage resistance .

高能量密度的优点使钕铁硼永磁材料在现代工业和电子技术中获得了广泛应用。如：电动机、发电机、核磁共振、磁选机、磁传动、磁悬浮、除铁器、防泄漏、仪器仪表、医疗器械、音响设备、汽车行业、通讯设备、计算机等行业和领域。

Its merit of higher energy density results in its wide use in modern industry and electronic technology such as: loudspeakers, high performance steppers, D C′ s, servos, linear motors, generators, magnetic resonanc e′ s, magnetic separations, iron removers, magnetic suspension, computer ＆ car parts, communication equipment, machine meters, wax ＆ leakage resistance .

电动机、发电机、电动自行车电机、核磁共振、磁选机、磁悬浮、除铁器、防泄漏阀门、仪器仪表、医疗保健器械、音响设备、手机、汽车行业、电子油门、通讯设备、计算机、礼品盒、箱包扣、衣服扣等行业和领域。

Particularly worth mentioning is that the use of such motor oil in the oil-pumping unit on the beam, in a different load, access to high power factor and efficiency.

特别值得一提的是，这种电动机用在石油系统的油梁式抽油机上，能在不同的负荷下，获得很高的功率因数和效率。

14 KV distribution system for oil-pumping units,reactor controlled reactive power compensation unit has been developed,which is based on the detailed analysis of the load performance,operation state,existing problem and influence factor of oil-pumping units.

为提高油田采油系统1.14kV供电系统的功率因数，在对油田抽油机负荷特点、运行状态以及抽油机电动机无功补偿存在的问题、影响因素等进行详细分析基础上，研制了一种用电抗器控制无功的无功功率动态补偿箱，并详细介绍了补偿箱的技术特点、使用方法和实际应用情况。

ABSTRACT:In order to raise the power factor of distribution system with 1140V for oil-pumping units based on the analyzing the load performance , operation state ,existing problem and influence factor of oil-pumping units ,a reactor controlled reactive power compensation equipment has been developed .And The technology character ,using method and applying example have been introduced in detail

为提高油田采油系统1140V供电系统的功率因数，在对油田抽油机负荷特点和运行状态，以及抽油机电动机无功补偿的存在问题，影响因素等进行详细分析基础上，研制了一种用电抗器控制无功的无功功率动态补偿箱，并详细介绍了补偿箱的技术特点，使用方法和实际应用情况。

Due to the rating voltage of the IGCT, series connections of two IGCTs and its corresponding dynamic and static snubbers are necessary to satisfy the 6kV motor, which is very popular in our country.

根据目前的IGCT耐压水平，为了得到我国数量众多的6kV高压电动机所需的输入电压需要两只IGCT及相应的阻容吸收回路的串联使用。

Furthermore,this paper also brings forward a new open-phase protection circuit by experiment.

针对三相异步电动机缺相而烧毁的现象，分析了故障的原因，并提出一种新的缺相保护电路。

Open-phase protection of motor damage, mostly caused by off-phase operation, and people running off to the motor of what kind of harm, what should be taken to protect the right way, so far there is no more or less the same views.

断相保护电动机损坏，大多数是断相运行造成的，而人们对断相运行给电机造成什么样的危害，应采取什么样的保护方式合适，至今尚没有比较一致的意见。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。