电机的

Our company is shaker, vibration motor manufacturer of professional, with strong technical force, and improve the means of detection, strict quality management system, good corporate reputation.

我公司是振动筛、振动电机的专业生产厂家，拥有雄厚的技术力量，完善的检测手段，严格的质量管理体系，良好的企业信誉。

This paper analyses the mathematical model for BDFM (brushless doubly-fed machine) based on synchronous coordinates in the point of rotor speed d-q model. A new type of power control system is designed by using flux linkage oriented vector transformation control technology.

从转子参考轴d-q模型出发，研究同步坐标下的无刷双馈电机的数学模型，根据BDFM的特性，采用磁链定向的矢量变换控制技术，设计了一种新型的功率控制系统。

In addition, error resource existing in rotor position estimation algorithm is analyzed comprehensibly, therefore, some further work is made to eliminate the negative influence from errors. In this research, additional function is added to rotor position estimation algorithm to enhance precision of position estimation and its feasibility has been proved.

根据已有的无位置传感器转子位置检测原理，提出了两种改进的检测方法：一是改进电感法的检测方法，并设计了检测电路；二是根据SR电机的ψ-I-θ关系，研究了基于模糊推理规则的间接转子位置估算方法，分析了估算过程中存在的误差源，研究了提高估算精度的策略。

Motor speed is controlled by varying the current in the field windings.for example,when the amount of current flowing through the field windings is increased, the field strength increases, causing the armature wingdings to produce a larger counter EMF which slows the motor.conversely,when the field current is decreased, the field strength decreases, and the motor speeds up because the conter EMF is reduced.

调速控制的不同目前在外地windings.for例如，当电流流动量的通过外地绕组是增加，电场强度的增加，导致电枢wingdings产生较大的反电势而减慢motor.conversely当外地电流降低，电场强度降低，电机的速度，因为conter电磁场降低。

The microcomputer is used to monitor the whole system and reprocess the data. The single chip computer which is the center of the whole control system is used to collect and process the data, adjust the speed of the AC electromotor and control the magnetic brake.

微型计算机用来完成对整个系统的监控和数据的后处理，而单片机系统是整个控制系统的核心，试验数据的采集和前处理、交流电机的调速控制、磁力制动器的控制都由它完成。

Secondly, based on the function analysis of EV test bench, using the modular design idea, this dissertation compartmentalizes the functional module of EV test bench, and analyzes the essentially comprising of the modules such as driving module, power take off module, inertia simulation module, load simulation module, main control module and power supply module. Especially introduces selection principles of driving motor of power take off module.

其次，在对电动汽车试验台功能进行分析的基础上，采用模块化设计的思想对电动汽车试验台的功能模块进行了划分，并就驾驶引导模块、动力输出模块、惯量模拟模块、负载加载模块、试验台主控模块和电源模块的基本组成进行了深入分析，并在动力输出模块部分着重介绍了驱动电机的选择原则。

Axis design calculation, but also has bearing's choice, the bearing seat choice and the design, decelerates electrical machinery's choice, the axis design and the examination.

轴的设计计算，还有轴承的选择、轴承座的选择和设计、减速电机的选择、轴的设计和校核。

It overcomes low automation and adaptability of other congeneric control systems.Through timer module to set bait supplying time,the function of automatic feeding was realized in a whole day.Through master control CPU circuit and direct current velocity modulation to control the speed of feeding electromotor,the purpose of adjusting feeding distance was realized....

通过定时模块灵活设置供饵时间，实现全天全自动投饵的功能；主控CPU电路及直流调速电路控制投饵电动机的速度，实现了调整投饵距离的目的；霍尔电路与声光报警电路保护投饵电机的安全；使自动投饵控制系统的通用性更强，可以应用到各种水产养殖业的供饵系统中。

The speed-sensorless vector control of induction motor is one of the hot topics in electric-drive field, whose main study is to adopt a kind of quick and effective method to accurately observe the rotor flux and rotor speed in the condition that the parameters vary and certain and uncertain disturbance exists.

感应电机的无速度传感器矢量控制是目前电气传动领域研究的热点之一，其主要研究内容为在存在参数变化、扰动及各种不确定性干扰的情况下，采用一种快速、有效的方法对转子磁链、转子转速进行较为准确的观测。

The parameters of the machine are measured by no-load test and short-circuit test. The relationship between the exciting current and corresponding air-gap voltage at the rated frequency is obtained, thus determining expressions for exciting inductance and exciting current in linear segment form. The equivalent circuits in a/30 reference frame are based on the parameters by above tests.

通过空载实验和短路实验对异步电机的参数进行了测量，由额定频率下的空载实验测得不同激磁电流与相应的气隙电势，给出了激磁电感与激磁电流的分段线性表达公式，为得到αβΟ坐标系统下的等值电路奠定基础。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。