1、

A novel variable speed constant frequency wind generation system with rotor current hybrid control

新型转子电流混合控制的变速恒频异步风力发电系统

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2、

The speed-regulation is working under d-q coordinate system of rotor, and takes rotor current component as orientation control, so there is no need to test the initial position of the rotor.

速度调节在转子d-q坐标系下进行,以转子电流矢量进行定向控制,所以无须检测转子初始位置,这样便构成了无速度传感器转子变频控制系统,提高了系统的可靠性。

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3、

Electromagnetic process of self-synchronous paralleling is analyzed. With properly assumptions, mathematical expressions of armature current, rotor current and electromagnetic torque are deduced.

分析了自同步并列的物理过程,通过适当的假设,运用解析法推导了自同步并列时的定、转子电流及电磁转矩的数学表达式。

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4、

A improved motor model is proposed by analyzing general inductive motor mathematics model. The model makes rotor current is linear with slip ratio and realizes linear relation between electromagnetism torque and rotation rate.

通过对一般化感应电机数学模型的分析,提出一种改进的电机模型,该模型使转子电流ir与转差率S呈线性变化,实现了电磁转矩和转速之间的线性关系。

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5、

maximum motor start current under full voltage start conditions is defined by the motor's locked rotor current (lrc).

全电压起动条件下最大电机起动电流是由电机锁定转子电流(LRC)确定的。

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6、

calculation of rotor current on induced excitation synchronous generator when considering the stator harmonic stationary magnetomotive force

考虑定子高次谐波恒定磁势的感应励磁同步发电机转子电流计算

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7、

Fuzzy PID Control of Rotor Current Excitation in an Asynchronized Synchronous Generator

异步化同步发电机转子励磁的模糊PID控制

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8、

In this paper, the initial position of rotor can be obtained by detecting the current change rate of winding coil which is connected to DC pulse when the stator core to reach saturation and the stator windings inductance decreases.

由于定子铁芯达到饱和时定子绕组线圈中电感减小,通过在绕组线圈中通以直流脉冲并检测线圈中电流变化率,从而得到转子初始位置。

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9、

Two torque estimate methods based on this nonlinear model are proposed: one method estimates torque value by current and rotor position, and the other one estimates torque by current and flux linkage.

在所建立模型的基础上设计了两种转矩估计器:一种通过电流和转子位置计算转矩,另一种则根据电流和磁链来估计转矩。

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10、

We can find that the nondimensional process and the matrixing make current model more concise, the substance clearer, and the approach simpler. ( 4) A kind of model of rotor-bearing-seal system dynamics is set up integrally in this thesis.

该模型及算法的无量纲化以及矩阵化表述,使得模型更加简洁,意义更加清晰,算法更为简单。(4)建立了针对复杂转子系统动力学分析的转子轴承密封系统动力分析模型。

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11、

Considering grid voltage dip as disturbance, the thesis proposed a rotor damping current control based on feed-forward structure.

从电网电压作为扰动的角度出发,提出一种基于前馈结构的转子电流阻尼控制方法。

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12、

For the current helicopter of single main rotor with tail rotor, the effect of inflow models with different characteristics on helicopter trim and digital simulation was discussed.

以常规单旋翼带尾桨直升机为对象,讨论均匀与非均匀入流模型对直升机飞行数值仿真的影响。

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13、

For solid rotor of radial magnetic bearing, besides the windage loss, the iron losses will be significant when the speed is high, and the eddy current loss will be dominant at high speed.

电磁轴承支承的实心转子在高速旋转时,除由于空气摩擦产生损耗外,转子内还将产生相当大的铁损耗,而且主要是涡流损耗。

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14、

m rotor and over mixed current and axle current hydropower generation equipment and its key matching auxiliary engines

转轮直径8.5米及以上混流、轴流式水电设备及其关键配套辅机

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15、

analysis and calculation of eddy current in induction motor with solid and cage rotor

实心笼型异步电机转子涡流分析与计算

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16、

the wattful loss of harmonic current in cage rotor is a component of the stray-load losses.

笼型转子的谐波电流I2R损耗属于杂散损耗的组成部分。

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17、

two-dimensional finite element model of induction motor with solid and cage rotor is set up by ansys, taking saturation into account, the distribution of eddy current in rotor is analyzed when starting, eddy current losses in solid rotor and cage are also calculated.

使用ANSYS软件建立实心笼型异步电机二维有限元模型,分析考虑磁路饱和情况下电机起动时转子中涡流的分布情况,计算转子笼条和实心体中的涡流损耗。

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18、

application of current monitoring for fault diagnosis of cage motor ′ s rotor

电流监测在笼型异步电动机转子故障诊断中的应用

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19、

in this paper, the formula of calculation presented in reference [ 1] for harmonic current wattful loss in cage rotor is derived by the author in detail.

笔者在本文中对文献[1]所提出的转子谐波电流I2R损耗的计算公式进行了较详细的推导,以供读者参考。

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20、

3-d eddy current field computation in squirrel cage rotor of induction motors

异步电机斜槽转子三维涡流场计算

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