直流电机

The technique made full use of the characteristic of PR controller which can realize zero steady-state error in AC input signal in stationary frame. In the method, the active and reactive current component in the vector control strategy were transformed in the stationary frame to achieve the objective of keeping the DC-link voltage constant, adjusting the power factor and decoupling the active and reactive power. Compared with conventional double close-loop proportional integral controller, the PR technique is better in harmonic compensation without the complex rotating frame transformation and the couple or feedback voltage which is easily influenced by temperature and circuit parameters. The control algorithm is easy to be realized while the robustness and power quality is improved.

该方法充分利用了PR控制器能够在静止坐标系下对交流输入信号无静差控制的优势，将矢量控制策略下的有功电流和无功电流分量转换到静止坐标系下进行调节，实现网侧变换器维持直流电压稳定和调节功率因数的控制任务和双馈电机有功、无功功率的解耦控制，与传统的双闭环PI控制相比，该策略无需繁琐的坐标旋转变换，不存在受温度及电路参数影响的耦合项和前馈补偿项，且易于实现对系统低次谐波电流的补偿，减小了控制算法实现难度，提高了控制系统的鲁棒性和电网电能质量。

This paper introduces the principle of electromotor based on single chip computer 8051PWM,and the realization process of reversible control and non- reversible control .

介绍了基于单片机8051PWM控制的电动机原理，阐述了8051与直流电动机构成的电机可逆控制和不可逆控制的实现过程。

With many years' development, we have established advanced production and detection lines for direct-current traction electric motors, magnetic segregator and mining electric locomotives.

经过三十多年的发展，我厂现已拥有一条较先进的直流牵引电机，磁力分离器，工矿电机车的生产、检测流水线。

Reliability model in series of motor driving system in vehicle was established.

直流母线支撑电容、大功率电子器件、控制电路、轴承和绝缘的失效是电动汽车电机驱动系统的主要失效模式。

The paper mainly introduces a dynamic simulation of step input PID control, which is conducted on a DC servomotor operated on MATLAB.

本文主要就MATLAB软件用于直流伺服电机对单位阶跃输入响应的PID校正动态模拟仿真进行了介绍。

Elevator sliding door is usually driven with a DC or AC rotary motor.

传统的电梯门机采用的是直流或交流旋转电机来实现。

The present invention relates to a method for heuristically starting up DC brushless servo electric machine, including the following steps of (1) after powerup of an increment type photoelectric encoder, electrifying a stator winding two by two with identical time interval to generate six-directional stator winding resultant magnetic fields;(2) detecting six different angles rotated by the rotor within identical tiny time interval by the photoelectric encoder;(3) selecting most positive value rotation angle from the six different angles, and determining maximum torque corresponding to the stator winding resultant magnetic field, and implementing servo startup using the maximum torque as constant starting torque;(4) after the zero-point signal of the photoelectric encoder occurring, switching to servo operation with normal constant torsion.

本发明直流无刷伺服电机试探启动方法，采用如下步骤：(1)增量式光电编码器上电后对定子绕组采用相同的时间间隔两两通电，顺序产生六个方向的定子绕组合成磁场；(2)由增量式光电编码器检测出转子在相同的微小时间间隔内分别转过的六个不同的角度；(3)从转子六个不同的角度中选出最大正值的转角，确定相应定子绕组合成磁场对应的最大转矩，并以该最大转矩为恒定启动转矩进行伺服启动；(4)当增量式光电编码器零点信号出现后，切换为正常恒转矩伺服运行。

Producing the species well-found direct current didn't brush and had already brushed electrical engineering controller.

生产品种齐全的直流无刷，有刷电机控制器。

In theoretical and experimental discussion of the brushless DC motor control on the number of non-linear problems, very interesting.

在理论和实验上讨论了直流无刷电机控制上的几个非线形问题，很有意思。

The principle of brushless DC motor the control method with position sensor is introduced, and the control system based on DSP is presented.

介绍了直流无刷电机的工作原理和基于位置传感器的控制方法，提出了基于数字信号处理器的控制系统。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。