调速

The application of the high-power three-level converter in the mine master hoister was mainly in- troduced,and the principle of IGCT innverter was analyzed.

着重介绍了IGCT大功率三电平变频器在煤矿主井提升调速系统中的应用，分析了提升机电控系统中运用IGCT三电平逆变器的工作原理。

On the basis of variation characteristics of ship speed error model, a ship speed regulator using the on-line adaptive error model is proposed in this paper. The control scheme is based on back propagation multi-layer perceptrons adaptive neural network in which a modified hyperbolic tangent function is used as the activation function of an auto-tuning neuron and is updated by the steepest descent method.

在分析船舶航速误差模型变化特性的基础上，应用激励函数的自适应神经网络和最陡下降法的非线性优化技术，提出了自适应学习误差模型控制方法，应用于船舶柴油机调速器控制系统。

Our leading products include marine gearbox, Vehicle Transmission, engineering mechanical gearbox, industrial timing clutch, wind power generating speed increaser, industrial drive device, gearbox for agricultural machinery, friction products and powder metallurgic components, etc, which are widely used in various fields.

主导产品船用齿轮箱、汽车变速器、工程机械变速箱、调速离合器、风力发电增速箱、工业传动装置、农业机械变速箱、摩擦制品及粉末冶金零件等八大类1000多个品种，被众多领域广泛应用，其产量和出口量均居全国领先地位。

Induction motors based on variable frequency speed adjustment system arewidely applied in industrial fields and daily life.

感应电机变频调速系统在工业领域和日常生活中得到了广泛了应用。

To deal with the second type of variable speed system, a method which combines sliding mode decoupling control theory and Phase-Locked Loop technique is firstly applied to the induction motor's variable speed control.

针对第二类系统，本论文首次提出了将滑动模解耦控制理论与锁相环技术相结合的方案，应用于感应电机的调速控制系统。

Using neural network a-th invert system, the induction motor variable frequency speed-regulating system of V/F and vector control can be changed into feigned linear systems.

结合磁场定向的特点，导出了矢量控制运行方式的交流电机变频调速系统的数学模型，并对该系统进行了可逆性分析，证明该系统可逆。

Common induction motor variable frequency system is extensively applied, but common induction motors are designed by constant frequency and constant voltage, when the frequency change that induction motor works, the parameter and performance of common induction motor will change.

摘要普通交流异步电动机变频调速系统被广泛应用，但是，普通交流异步电动机都是按恒频、恒压设计的，在频率改变时，电动机的参数和性能都将发生改变。

This paper develops an full digital induction motor vector control platform based on DSP which is related to the subject of Natural Science Fund of Hunan Province "The Research on the System of High Peformance Intelligentized Induction Motor Variable Frequency Speed Regulating", and presents the software and hardware design scheme.

本论文结合湖南省自然科学基金项目"高性能智能化感应电机变频调速系统研究"，开发出基于DSP的全数字感应电机控制实验平台，并给出了该系统的软硬件设计方案。

ABSTRACT Aiming at problems of trans-vector controller in a vehicle-carried induction motor such as variable rotor and stator resistance following motor temperature, and their inductance varying with flux saturation degrees. Firstly, CSI and VSI are introduced, for CSI, it can hold the advantages both FOC and DTC using stator flux directional, PI parameter and simulation are also introduced. Secondly, equations of IM in the synchronous rotary frame and its static counterpart, as figuring in the saturation condition of magnetic field, are dealt in this paper and the simulation results are presented. Thereafter, the parameter designing of PI trans-vector controller is processed, which features the non-linear model. In practical realization, as neglecting the dynamical change of motor inductance, this paper employs online modification of inductance parameters, according to the flux saturation, then transforms the non-linear equations into linear ones, and so compacts the structure of controller. Thirdly, in view of the maximum torque output is extraordinary requisite when Electrical Vehicle start up, accelerate, and overtake, this paper issues the maximum torque when both inverter and battery capacity is corporeally definite. Fourthly, on-line differentiating and analyzing both rotor's time constants and its flux by using the expanding order reduction and discrete Kalman filter equation are fathomed, in order to realize high-performance trans-vector algorithm, and also the simulation results are presented. Fifthly, the close-loop regenerative brake system, when the EV's torque is set constant, is deduced; at the same time, unification of electric drive model and brake model is executed. Combined with maximum charge current demands, the mathematical model for online yielding torque as a demand.

本论文针对车载异步电机在矢量控制器所遇到的问题：定转子电阻随温度变化及随电机饱和程度变化的转子电感及定子电感而影响电机调速性能提出一套完整的解决方案：分析了电流型逆变器和电压型逆变器在实现矢量控制时控制器参数的计算，分析出对于电流型逆变器在采用定子磁场定向时，其性能同时具有矢量控制和直接转矩控制两者的优势，并对电压型逆变器在转子磁场定向下的模型进行了仿真研究；建立异步电机非线性模型，推导出考虑磁饱和时异步电机在同步旋转坐标系及静止坐标系下的方程，并做出了仿真结果，建立异步电机在非线性模型下的矢量控制调节器的PI参数设计，在实际应用中，若忽略电机电感的动态变化，可以根据当前的磁路饱和状态而在线修正电感参数，从而将非线性方程线性化，降低控制器的复杂度；考虑到电动汽车在起动和加速超车时需要电机有最大转矩输出，本文讨论在逆变器容量一定和电池供电能力有限的情况下电机最大转矩输出问题；推导了异步电机扩展降阶、离散卡尔曼滤波方程在线辨识转子时间常数和转子磁通，用于实现高性能的矢量控制算法，并给出了仿真结果；推导出了电动汽车恒转矩给定的闭环回馈制动系统，实现了电动控制模型和制动模型的统一，而且结合铅酸电池最大充电电流的要求，为制动转矩在线给定建立了数学模型；设计了基于双DSP系统的高性能矢量控制器软硬件框图，并以大量实验数据说明矢量控制在电动汽车应用的实际应用状况。

It can input pulse signal to adjust speed .

通过输入脉冲信号达到调速的目的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。