电机的

First, the dissertation summarizes the properties, developing state and application fields of BLDCM, then its fundmental structure; operation principle and control strategy is also presented. On the base of roundly analyzing all kinds of the drive motor in electromotion type railway switch, BLDCM is proposed to replace the formerly traditional DC motor in railway switch. Second, the whole design scheme and key technology of control system is put forward based on analyse of the technical parameters and requirements.

首先，论文介绍了无刷直流电动机的特点、发展和应用概况，分析了稀土永磁无刷直流电机系统的基本构成、工作原理和控制方法；在对目前各种电动转辙机驱动电机分析的基础上，提出将稀土永磁无刷直流电机用于铁路转辙机，以替换原有的串励有刷直流电动机。

Direct torque control is another high performance control technique of AC motor, it discard the decouple idea of vector control, but adapt flux oriented control and transient space vector theory, directly control stator flux and torque, it has the advantage of rapid torque response and less relying on stator parameters, but has the disadvantage of bigger torque ripple.

直接转矩控制技术是继矢量控制技术之后的又一种交流电机高性能控制技术，它摈弃了矢量控制中解耦的控制思想，采用定子磁链定向和瞬时空间矢量理论，直接对电机定子磁链和转矩进行控制，具有转矩响应快、对电机参数依赖小的优点，但它的不足之处就是存在转矩脉动。

After analyzing the features of hoist motion and existing control method of the squirrel cage motor, a scalar control strategy with decoupled control algorithm is suggested and the requirement of the underground hoist are effectively satisfied.

根据绞车运行的特点，在综合分析笼型电机现有控制方案的基础上，提出了解耦算法下标量控制的电机调速策略，有效地满足了绞车对电机控制指标的要求。

According to starting performance of hybrid diesel engine of ISAD technology at low temperature, the match relationship among starting resistance torque, ISG motor power and storage battery capacitance was summarized, and influence of battery capacity was studied, which were as related to resistance torque, minimum start-up speed, electrical operating characteristics, electric transmission coefficient and thermal effects.

针对ISAD技术混合动力柴油机起动系统低温下的性能问题，该文结合柴油机的起动阻力矩、最低起动转速、ISG电机工作特性和电机热效应等因素，研究了起动阻力矩随环境温度、起动转速的变化规律，分析了起动阻力矩与ISG电机功率、蓄电池容量之间匹配关系，以及影响蓄电池性能的主要因素。

Based on the Maxwell Stress Tensor method, an effective torque calculation model was developed to eliminate the difficulties in torque calculation.

针对目前此类球形电机转矩计算的困难，基于麦克斯韦张量法推导并建立了有效的电机转矩计算模型，运用该方法对已知的电机模型进行分析，获得了典型的转矩特性。

Since DTC has been developed for nearly 20 years as a AC drive technology, it has become the most popular technology in the field of AC drive for its advantages of direct control, short adjusting time and unsensitive with the motor parameters.

而在电机控制技术方面，直接转矩控制作为近年来新发展起来的一种电机控制方法，已显示巨大的优越性，具有控制思想直接、反应快速、受电机参数影响小的优点，成为目前研究的热点。

The simple, easy and quick sensor-less control of position and speed has been attainted. At the same time, in order to overcome the shortcomings of low efficiency under high speed with flux-weakening, the control idea of boost under motor status and flux-strengthening under low speed status has been proposed from structure design and performance analysis by using the motor design and transient analysis software of ANSOFT.

同时为了克服永磁同步电机高速弱磁效率低的问题，借助于ANSOFT软件电机设计和瞬态分析工具，从结构设计以及性能分析方面提出了电动时升压和低速强磁控制相结合的控制思想，基本实现了永磁同步电机高速不需弱磁的大范围高效率的运行。

This paper introduces the structure, especially the technics of armature winding and the way of arrange method of the motor. Based on it, the physical and mathematical model of the armature magnetic field was found. Then making use of the FEM to compute and analyze the armature magnetic field. At last, the influence of the armature magnetic field to the main field is discussed.

本文通过对此种电机结构，尤其是电枢绕组工艺及盘列方式的简单介绍，建立了盘式无铁心永磁同步电机电枢磁场的数学模型和物理模型，并利用有限元数值计算方法对电枢磁场进行计算，分析了此种电机电枢磁场的分布情况以及它对主磁场的影响

The influences of Halbach magnet axial length on the leakage flux density are analyzed. The relationship between the key design parameters of motor, such as leakage coefficient and the calculated length of the armature, and the structure parameters of motor are obtained.

通过大量的计算，探讨了Halbach阵列永磁电机在转子无铁心情况下影响气隙磁密的各种因素，分析了不同Halbach磁体轴向长度对端部漏磁的影响规律，给出了无铁心永磁电机漏磁系数、电枢计算长度等主要设计参数随电机结构尺寸的变化规律。

Acting mainly the well-known brand, Panasonic Electrical Products; Hitachi motor; Hitachi electrical tools; SMC Pneumatic items; KOGANEI pneumatic tools; Mitsubishi Motors, various blades, raw material products; Kyocera blade products; OSG bit, cutter, Tap products; Sampoong measurement tools and measuring instruments categories related products; NT knife handle products; BIG knife handle category Products; FSK wheel products; THK linear guide, screw type; NSK, NTN, NACHI bearing; Omron electrical switch products; East electrical products; Youyan of oil Products; citizen lathe products; JAM the lathe, machining center fixture products; KHS the lathe, machining center fixture products; OKK processing center, and other processing equipment products.

代理的知名品牌主要有，松下电工系列产品；日立电机类；日立电动工具类；SMC气动件产品；KOGANEI气动工具类；三菱电机、各种刀片、原材料类产品；京瓷刀片类产品；OSG钻头、铣刀、丝锥类产品；三丰测量工具及测量仪器类相关产品； NT刀柄类产品；BIG刀柄类产品；FSK砂轮类产品；THK直线导轨、丝杠类；NSK、NTN、NACHI轴承；欧姆龙电器开关类产品；东方电机类产品；油研油压件产品；西铁城车床类产品；JAM的车床、加工中心用夹具系列产品；KHS的车床、加工中心用夹具系列产品；OKK加工中心等加工设备类产品。

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。