查询词典 motor-driven

First, the paper reviews the development and research of AC transfer speed system, introduces the different control strategy of transfer speed system for asynchronous motor, and discusses the basic principle of vector control system for asynchronous motor in detail,including the mathematics model and coordinate transformation of asynchronous motor, the fundamental equation of vector control, the estimation method of rotor flux, the system structure of vector control etc. Then, the paper lays stress on the fundamental principle, control algorithm and realization method in TMS320LF2407 of space vector pulse width modulation technology.

本文首先简述了交流调速系统的发展和研究重点，介绍了异步电机调速系统的不同控制策略，详细论述了异步电机矢量控制系统的基本原理：异步电机的数学模型和坐标变换、矢量控制的基本方程式、转子磁链的观测方法、矢量控制的系统结构等，并重点分析了空间矢量脉宽调制技术的基本原理、控制算法以及在TMS320LF2407中的实现方法。

The performance of speed regulation of AC motor can compare with that of DC motor after the FOC is introduced into AC motor field.

采用矢量控制后交流电机的调速性能可以和直流电机媲美。

Ning Boheng tells limited company of hydraulic pressure motor is the professional production company that the design makes equipment of system of actuating device of gyrator of winch of motor of hydraulic pressure of type of incurvate line motor, crankshaft, hydraulic pressure, hydraulic pressure, quiet hydraulic pressure, of all kinds hydraulic pressure and hydraulic pressure.

宁波恒通液压马达有限公司是设计制造内曲线马达、曲轴式液压马达、液压绞车、液压回转器、静液压驱动装置、各类液压系统及液压设备的专业制造公司。

Pole and slot and indicates the rule followed, depending on the structure features and performance characteristic of DC motor, and design 240w brush less DC motor based on armature reaction, and analyzes detailed Hoer position sensor and the control and drive of rush less DC motor.

而且针对直流电动机结构特点和工作性能，在电枢反应理论基础上设计出功率为240w的无刷直流电动机，并对霍尔位置传感器和无刷电动机的控制及驱动做了详细的分析。

From the view of torque controlling strategy, the relation between the torque controlling strategy such as the electric current feedback method、 PWM open loop method etc and the vehicle driving way is analyzed firstly, then the conclusion could be drawn that the PWM open loop method has more advantages than the electric current feedback method when they are both used in the same vehicle which is direct driving by hubcap motor. Secondly, based on the electric motor mathematic model and its experiment, a new permanent brushless dc motor phase electric current detector method in which a digital signal processor and single current sensor are used is introduced.

从转矩控制策略角度来看，分析了电流反馈法以及开环PWM电压调速控制方法与车辆的驱动方式关系，得出了电机驱动电压受限的情况下，无论是从对车辆的动力性能影响还是从对车辆的驱动要求来讲，开环PWM电压调速控制方法较电流反馈法更适用于以轮毂电机直接驱动方式的两轮电动车中；其次，根据电机的数学模型以及电机试验波形，提出了一种利用数字信号处理器以及单个电流传感器检测三相永磁无刷电机电枢电流的新方法，这种方法具有较强的适应性、实时性，它可以根据控制系统的要求，适时地提供所需电流数据，是目前许多文章关于无刷电机相电流平波的重要技术基础。

According to the disadvantage of great current made by 660V/1140V AC motor which works under the mine when the AC motor starts, it can make power system and motor impactive.

根据在煤矿井下工作的660V/1 140V交流电动机起动电流大，对电网及电机造成冲击的缺点，设计了一种新型的矿用隔爆型软起动器。

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。

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。

Jiangdong Road widening in the transformation, in order to improve intersection capacity of motor vehicles, in the intersection has increased the number of motor vehicle lanes, the road set up the first vehicle dedicated Nanjing Des Voeux Road, convenient to public transportation motor vehicle stops and along the access unit.

江东路拓宽改造，以提高交叉能力的机动车辆，在交叉路口，增加了一些机动车辆车道，道路建立了第一个汽车专用南京中环德辅道，方便的公共交通车辆车站及沿线的接入单位。

To the motor car which adopted the tumbler journal box orientation method,the ride index and the running safety of the motor car has a big relation with the reliability of the rubber tumbler journal box node,especially for the high-speed motor car with the speed of 350 km/h.

对于采用转臂式轴箱定位的动车来说，橡胶转臂定位节点的可靠性关系着动车的平稳性和运行安全性，特别是速度350 km/h的高速动车。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。