电机的

Take advantage of the high-speed calculation capability of DSP. Without any additional speed-measuring circuit,calculating the running speed.,then modulating PWM can be easily made to control the speed of the motor.

充分利用DSP高速的运算能力，在不需要另加测速电路的情况下，软件计算电机的在转速度，然后根据在转速度，调节PWM波的占空比，很方便实现电机的调速，达到电机无传感器的控制。

Fine User Interface.And the system was circulated with a man-machine conversation.The purpose to do all of this is just to let computer protract Switched Reluctance Motor with an idea that people alter the parameter of Switched Reluctance Motor.Because Switched Reluctance Motors have a character: although the parameter and size changed ,the structure is fixedness .

该课题主要针对开关磁阻电机的计算机辅助设计，以流行的VisualBasic作为开关磁阻电机软件的开发平台，结合AutuCAD2000关于VisualBasic的二次开发，开发出一个具有良好用户界面的交互性的开关磁阻电机CAD软件系统。

The impact of parallel operation of wind turbines on power flow is analyzed, in which the squirrel cage induction motors are used as the constant speed wind turbine and the double fed induction motors are used as variable speed wind turbine.

分析了以鼠笼感应电机作为发电机的定速风电机组和以双馈感应电机作为发电机的变速风电机组并网运行对系统潮流的影响，并对不同控制模式下使用双馈感应电机的变速风电机组的电压和无功控制特性进行了比较。

The mathematical model of the linear induction motor is built in the way of motor science, and then the control model of the linear motor feed system is proposed, and the relations between the parameters in the model and the system dynamic performances are studied, using the Simulink Module in MATLAB.

从电机学的角度建立了直线感应电机的数学模型，然后又建立了直线电机进给系统的控制模型，通过MATLAB的Simulink功能模块仿真分析模型中各参数和系统动态稳定性的关系。

The step motor can receive digital signal directly and has the ability to response outer environment immediately and has no accumulation error, which often is used in driving system. In this driving system, open-loop control system is composed of stepping motor, which can satisfy the demand not only for control precision but also for the target of economic and practicality. On this basis , the analysis of stepping motor in power calculating and style selecting is also given.

由于步进电机能够直接接收数字量，响应速度快而且工作可靠并无累积误差，常用作数字控制系统驱动机构的动力元件，因此，在驱动装置中采用由步进电机构成的开环控制方式，这种方式既能满足控制精度的要求，又能达到经济性、实用化目的，在此基础上，对步进电机的功率计一算及选型问题经行了分析。

A field-circuit approach for accurate prediction of thesteady-state performance of squirrel cage induction motor is presented. The method is based on two-dimensional complex nonlinear eddy-current solution with the use of effective reluctivity.

基于电机二维非线性正弦涡流场有限元计算及有效磁化曲线的等效，用场路结合的方法分析电机的特性，考虑了集肤效应和铁心饱和对电机参数的影响。

In order to study the heating and cooling problems of the motor,heat transfer simulation model for water-cooled explosion-proof motor was established on the basis of analyzing its structure,materials,and heat exchange mechanism.

为了研究该类电机的发热与冷却问题，在对防爆型水冷电机的结构、材料以及换热机理进行分析的基础上，建立了防爆型水冷电机的传热数学物理模型。

Recently, with the rapid development of the economy, the kind and quantity of motor increase fast, and the quality and performance standards for motor become more rigid.

近年来，随着经济的飞速发展，电机的品种和产量日益增加，电机的性能和质量指标亦相应提高，这对电机测试技术提出了更高的要求。

To compare with traditional EVT system, reserved some advantages, such as two rotors can run at different speed, and so on. The innovations of BL-DMPM included:① No brush and slide rings were needed, so simpled the structure of motor, and improved the reliability.② The rated speed of two rotors can be different according to selection of pole numbers, so the proposed motor was more appropriate than the traditional one when it was used in hybrid electrical vehicle, where large torque at low speed was needed.

它保留了传统双机械端口电机的主要优点，如两个机械端口可运行在不同转速和可无极连续变速等，而取消了传统双机械端口电机中的电刷和滑环，简化了电机结构，提高了可靠性，可以设计成使两个机械转子的额定转速相差很大，从而更适用于需要低速大力矩的混合动力汽车等场合。

The innovations of BL-DMPM included:① No brush and slide rings were needed,so simpled the structure of motor,and improved the reliability.② The rated speed of two rotors can be different according to selection of pole numbers,so the proposed motor was more appropriate than the traditional one when it was used in hybrid electrical vehicle,where large torque at low speed was needed.

它保留了传统双机械端口电机的主要优点，如两个机械端口可运行在不同转速和可无极连续变速等，而取消了传统双机械端口电机中的电刷和滑环，简化了电机结构，提高了可靠性，可以设计成使两个机械转子的额定转速相差很大，从而更适用于需要低速大力矩的混合动力汽车等场合。

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。