电机的

Such motor, which has slotted topology in particular, is considered by means of both analytical and numerical method.

本文对于具有齿槽结构的这类电机的磁场分布分别利用解析法和数值法给出了分析。

The results of the experimentation indicate that the machine is steadying at low-speed.

对一台样机进行了实验，实验结果表明其具有良好的低速平稳性，符合无齿轮电梯曳引系统对电机的要求。

At first,the prin ciple of BLDCM is analyzed and the model is built;then a test is performed on a tining system of close loops of speed and current;torque ripple components are r educed by controlling switching andles of the PWM.

文中首先建立永磁无刷直流电机的数学模型，以此进行转速和电流双闭环调速系统控制；并通过调节 PWM发生器的开关频率来减少转矩脉动。

E. , starting mean current and minimum, mean and maximum starting torques.

根据SR电机的矩角特性，给出了起动性能的计算方法。

HTS bulks can also be used as flux-focusing elements in reluctance motors.

高温超导块材的发展为新型电机的诞生提供了可能。

Rotor loss reduces the power efficiency and demagnetizes the magnets.

转子涡流损耗使电机的效率下降并能引起转子永磁体的退磁。

The this article main research is high speed vibrates the electrical machinery the design and its dynamic imitates.

本文主要研究的是高速振动电机的设计及其动态仿真

Through upbuilding the math model, we can get the precise starting performance of PM motor with emulator.

通过建立数学模型，采用仿真的方法可以较准确获得永磁电机的启动性能。

Thus, simplified mathematic model is established on the basis of a, b, c three phase variables.

而且众所周知，电机的数学模型是多变量、强耦合的非线性系统。

However, duty radio of the induction motor in it is low. At the same time, there still exist many problems, such as long driving chain, poor flexibility, tremendous cubic and weight in long stroke, and low efficiency.

但由于油梁式抽油机所用感应电机的负荷率低，同时还存在系统的传动链长、柔性差、在长冲程时体积和重量巨大、系统效率低等问题。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。