电机的

The flux hysteresis controller was ignored in the constant torque region and an improved method was proposed to make the estimation of torque easier.The proper stator voltage space vector was selected based on the output of the torque hysteresis controller and the sector which the current rotor flux locates in.

摘 要：针对无刷直流电机直接转矩控制中磁链观测困难、控制复杂等问题，提出了一种应用于无刷直流电机二二导通方式下的新型直接转矩控制方法：在电机基频以下调速时，略去了常规的磁链观测控制环节，改进了转矩计算方法，通过转矩滞环控制选择所施加的空间电压矢量。

A new brushless DC motor DTC scheme was studied to solve those problems associated with direct torque controlof brushless DC motor,such as difficulty to control flux and complexity to estimate torque.The flux hysteresis controller was ignored in the constant torque region and an improved method was proposed to make the estimation of torque easier.The proper stator voltage space vector was selected based on the output of the torque hysteresis controller and the sector which the current rotor flux locates in.

摘 要：针对无刷直流电机直接转矩控制中磁链观测困难、控制复杂等问题，提出了一种应用于无刷直流电机二二导通方式下的新型直接转矩控制方法：在电机基频以下调速时，略去了常规的磁链观测控制环节，改进了转矩计算方法，通过转矩滞环控制选择所施加的空间电压矢量。

On the base of the mathematic model of the PMSM, the reasons of the torque pulsation are analyzed. Then the validity of Iterative Learning Control in torque ripple minimization is expatiated. A whole simulation model is developed using SIMPOWER, and the effective of ILC in torque suppressing is proved. The scheme for hardware and software of integrated PMSM are demonstrated in the thesis.

本文在永磁同步电机数学模型的基础上，总结分析了永磁同步电机转矩脉动产生的原因，引入迭代学习控制抑制转矩脉动，利用SIMPOWER工具箱建立了永磁同步电机控制系统的仿真模型，对PMSM控制系统进行了仿真，仿真结果证明迭代学习控制能有效地抑制转矩脉动。

In this paper series of traveling wave type ultrasonic motors that are fabricated by our group are introduced.

文章介绍了经多年研制而成的，直径分别为：30mm、45mm、6 0mm和 10 0mm的系列行波型超声波电机，描述了它们的结构，阐述了电机制作工艺，并对电机性能进行了实测和分

The double CPLD was made in step-motor control module and its special control model was defined to realize the data transformation between the unit and remote host, and its monitor of control statu and programming running model of manifold motor.

电机控制模块采用了2块CPLD芯片，设定步进电机专用控制模式，以实现步进电机控制单元与远程主机间的数据传输、控制状态的监控及运行模式的编程。

For carrying out a small physical volume and high reliability of the motor driving and control,by using HIP4081 chip and ALN hybrid integrated technology,a hybrid integrated technology H bridge circuit based on HIP4081 is designed to control bidirectional circumrotation and speed regulation of the motor.

摘 要：为了实现小体积、高可靠的电机驱动与控制，利用HIP4081专用芯片和ALN厚膜混合集成技术，设计一种基于HIP4081的厚膜H桥电机驱动电路，完成了H桥式驱动电路对电机双向转动和调速的控制。

Firstly analyzed the operation principle of BDFM;then used the method of parameters calculation based on magnetomotive force and magnetic conductance,and calculated the inductance parameters.

针对目前无刷双馈电机两套不同极数定子绕组之间，耦合能力弱而导致该类型电机功率密度低及性能指标差的问题，以结构简单易于制造的普通凸极磁阻转子BDFM为例，研究了转子极数对电机耦合能力的影响。

Since the turbine generator stator windings are usually with single-turn coils, the properties of the steep-fronted surge propagation are different from that in the motor windings which are usually with multiturn coils.

由开关动作引起的陡前沿冲击电压波严重威胁电机绕组的绝缘安全，开展陡前沿冲击电压沿电机绕组分布的研究对指导绕组绝缘设计和电机安全运行具有重要意义。

On the view of the result of experiment, the motor started stably and quickly with small toque pulsant and had wide scope of speed adjustment. It can content all of the request of the compressor of refrigeratory.

本控制系统是针对冰箱压缩机电机研制的，从试验的测试结果来看，电机起动稳定快速、转矩脉动小，具有较宽的闭环调速范围，完全满足冰箱压缩机电机各项性能指标要求。

In this paper, a DC pre-excitation strategy, which limits the starting current and enhances the electromagnetic torque via establishing the flux linkage before starting process, is proposed to the three-level inverter under analysis on the mechanism of the above large current.

该文在探究上述情况产生原因的同时，提出了一种应用于三电平变频器-电机系统的直流预励磁方案，在电机起动前预先建立起电机磁场，有效地遏制过大的起动电流。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。