查询词典 synchronous motor

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。

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。

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。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。