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In this paper, the change of back electromotive force current with the different PWM modes are analyzed in detail on the base of BLDCM model. According to theory and experiment ,ON-PWM type restrains the peak value of back electromotive force current and brings the lest effect to the motor control system.

基于无刷直流电动机的数学模型,分析比较了不同PWM调制方式下反电势电流的变化规律,并通过理论推导和仿真实验证明了当电机系统采用ON-PWM调制方式时,能有效地抑制反电势电流的峰值且对电机控制系统造成的影响最小。

The traditional BLDCM mathematical model establishment in the electric motor two-phase breakover foundations, in fact the neutral point is hanging, inevitable existence three-phase breakover at the same time.

传统的直流无刷电机数学模型建立在电动机两两导通的基础上,而实际上由于电动机中性点悬空,不可避免存在三相同时导通的情况。

The variable reluctance motor is practisely a synchronous motor operated as a brushless D. C. motor with electronic commutation.

变磁阻电机实际上是一种具有电子换相的,以无刷直流方式工作的同步电机。

A mathematical simulation model for dynamic characteristics of BLDCLM is obtained and by means of measure ,the parameters of the motor on inductance of coil is obtained.

3建立了无刷直流直线电机的数学模型并实验测取了电机的自感,并与计算值进行了比较。

By using Fourier series,the relation between the value and harmonic of cogging force and the number of slot and pole was acquired.

对微型短初级永磁直线无刷直流电动机进行了优化设计研究,在电机槽数不变的情况下,设计不同的电机绕组分布方式和初级长度内对应永磁体的数目,并进行了齿槽力的分析和研究。

The paper present a kind of brushless DC torque motor with coreless armature, which haven t static friction torque , inferred method of calculating current, torque, EMF, and etc.

提出了一种电枢上无铁心的无刷直流力矩电机,该电机无静摩擦力矩。

Firstly,by moving and circumrotating coordinate switching the complex model of tri-phase AC aosynchronism motor to Magnetization-Torque two axeses,The physical model of AC color Is transformed model of DC motor approximately,It is convenience to control the motor.

首先,经过坐标的平移和旋转变换,将原三相交流异步电机的复杂模型转换到M-T(Magnetization-Torque)两轴旋转坐标系上,将交流电机的物理型等效地变换成近似于直流电动机的模型,为控制带来方便。

First1y, by moving and circumrotating coordinate switching thecomp1ex model of tri--phase AC asynchronism motor to Magnetization-Torque two axeses, the physica1 mode1 of AC motor is transformedmode1 of DC motor approximate1y, it is convenience to contro1 the motor.

首先,经过坐标的平移和旋转变换,将原三相交流异步电机的复杂模型转换到M-T(Magnetization-Torque)两轴旋转坐标系上,将交流电机的物理模型等效地变换成近似于直流电动机的模型,为控制带来方便。

Super quiet direct current electrical engineering:Provide with the big power direct current dynamoelectric and the wheel gear organizations, peaceful movement.

超静直流车库门电机:配备大功率直流电动杨和齿轮机构,安静的运行。

It is very importance value for the researcher to design the vessel electric propulsion motor drives system.

当时,对于推进电机控制来说,直流电动机是最好的选择,但到了20世纪80年代,交流电机可调速驱动系统在工业上已经可以实现,在商业上很有竞争力。

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On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面,更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?