查询词典 wind motor

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。

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。

As a new generation of vehicles, moped scooters are on the cross-border of motor vehicles and non-motor motor vehicles.

助力车作为一种新型交通工具，其性质介于机动车和非机动车之间，因此，助力车的侵权责任分配机制也具有自身的特点。

Based on the analysis of the function of intelligent motor monitor required by the motors, a type of intelligent motor monitor has been developed supervising the motors on manufacturing field, the distributed supervision and management for the field operation motors are performed with the motor control center.

本文在分析电动机对智能监控器功能要求的基础上，开发了一种用于监控和保护工业生产现场电动机的电动机智能监控器，实现了控制中心对工业生产现场电动机的全分布式智能化监控和管理。

Motor torque-speed characteristic and the motor efficency under motor and generator mode is researched by experiment.

实验研究了电机在电动和发电两种状态下的机械特性和系统的效率。

Widely applied for electric motor, electrical appliance, apparatus, flame-proof electric motor and ship electric motor.

广泛用于电机、电器、仪表，以及防爆电机、船用电机。

No. I don't eat mice.

不，我不吃老鼠

Finally, the conclusions are applied to over-voltage models based on three-phase nonsynchronous closing of switches appearing in the power systems, the results in accord with the background physical meaning are obtained.

最后，将所得结论应用到电力系统中三相非同期合闸的过电压模型中，结果表明所得结论与实际背景的物理意义相吻合，同时结论的所有条件较容易验证，因此该结论具有一定的理论意义并便于在实际中应用。