查询词典 variable speed motor

So in this paper based on the characteristics and the optimum state theory of the vehicle, some kinds of control schemes are compared and discussed, and the fuzzy PID control scheme is adopted at last. The relation between air-cushion pressure and fan rotational speed on the optimum driving state is studied. The cushion pressure is used as controlled variable and the fan revolution is used as regulated variable. And transducer and fan motor are actuators.Based on the structure and operating properties of half-tracked air-cushion vehicle, the control system scheme and structure are presented. A control scheme using the self-tuning PID fuzzy logical controller is adopted. Fuzzy rules are set up and some researches have been done for fuzzy tuning method. At the same time the real-time measurement scheme by computer control is proposed, and electric circuits are designed. In the control system of half-tracked air-cushion vehicle cushion pressure P〓 is used as controlled variable and the fan speed n〓 as regulated variable.

因此本文以半履带式气垫车的特性和最佳工作状态理论为指导，通过对各种控制方法的比较与探讨，提出采用模糊PID控制方案，并且研究了在最佳工作状态下垫压及风机转速的关系，提出气垫压力作为控制参数，变频器和风机电机为执行机构，风机转速为调节量；主要进行了自整定模糊PID控制器的设计，研究了自整定PID模糊控制器的实现方法，编制了模糊控制规则，制定了模糊控制参数查询表，并分析了影响自整定模糊控制器相关的影响因素，确定了模糊控制表；为了实现半履带式气垫车的自动控制，还提出了计算机模糊控制系统的原理与结构，设计了相应的测量电路与控制软件。

Researches show that the drive force characteristics of the electric tractor drive system based on series DC motor is close the ideal characteristics, the curves are concave, low speed with constant power, and high speed with constant torque; the electric tractor has large working speed under different shifts, but the extensive coincidence speed shows that the variable ratio of the gear is unreasonable; the maximum climbable gradient of this electric tractor is more than 30%, and does not need frequent shift when working for its extensive climbable gradient; there are many influence factors of continuous working time, which the more obvious factors are working speed and working load, the working time increases with the increase of the working speed and working load.2. Simulation researches on the drive characteristic of the electric tractor.

研究结果表明：基于串励直流电动机(来源：ABC21论文网www.abclunwen.com)的电动拖拉机电驱动系统的驱动力特性场接近理想驱动力特性场，其各挡下的驱动力特性是一组下凹的曲线，低速恒转矩，高速恒功率；同一行驶速度下所对应高挡驱动力大于低挡驱动力，这是由电机的调速特性决定的；电动拖拉机各个挡位下具有较广的稳定作业速度范围，但是各个挡位之间速度重合的范围较多，说明所用变速箱变速比与电动机匹配不合理；电动拖拉机最大爬坡度达到30%以上，并且各挡爬坡度变化范围较广，作业过程中不需要频繁换挡；影响电动拖拉机连续作业时间的因素较多，其中作业行驶速度和作业负荷影响最为明显，作业负荷越大，连续作业时间就越短，作业速度越快，连续作业时间就越短。2、电动拖拉机驱动特性仿真研究。

A compound hydraulic system with variable frequency control, a throttle and variable displacement speed control was established. Using AMESim software, the vector control three phase asynchronous motor simulation model was established based on the analysis of the principle of three phase asynchronous motor simulation.

本文将节流调速和变频液压技术有机地结合起来，以解决变频液压容积调速在大惯量、低转速、变负载系统中的应用问题，利用AMESim软件建立了矢量控制的变频液压容积节流调速系统仿真模型，并对该系统进行了性能仿真。

Motion synchronization between tool in X direction and principal axis rotation was controlled by electronic gearbox in cam turning. And profiling mechanism could be superseded by servo tool-holder. Linear motor direct drive servo tool-holder was designed, and host-slave control system with PC and DSP was developed for the require of high-speed and realtime servo. The technical process was analyzed in cam turning. Servo tool holder with tool swinging and principal axis variable rotate speed were presented to keep constant cutting angle and speed.

将电子齿轮箱用于凸轮车削加工系统的传动，以伺服刀架取代了传统加工的靠模装置，实现了刀具X方向直线运动与机床主轴转动的同步控制；设计了直线电机直接驱动的伺服刀架及基于PC与DSP构成的上—下位机控制结构，采用DSP进行实时控制以满足高速伺服需要；对凸轮加工过程的工艺特点与恒角度、恒速度车削进行研究，提出了具有刀具摆动功能的伺服刀架与机床主轴变转速运动方案。

Plastic machinery equipment, packaging equipment, oil logistics company Cargo Electronic Scale Airlines Beijing, Beijing scales, electronic truck scale Electronic Hanging molding packaging machinery printing equipment farm machinery to food and beverage processing equipment, sewage treatment equipment, cleaning, cleaning equipment, air purification equipment, energy-saving equipment dust desulfurization equipment, noise reduction equipment silencers of refuse Incinerator generators, motor generator sets electrical high-voltage low-voltage electrical distribution equipment, textile equipment and transmission equipment leather processing equipment, paper processing machinery shoe machinery coating equipment paper-making equipment and accessories throughout the washing and iron furniture manufacturing machinery equipment technology equipment gift Ceramic production and processing machinery manufacturers of computer equipment, household electrical appliance manufacturing equipment toys processing equipment and special equipment in other industries transmission machine parts valve pump hydraulic filtration equipment machinery and components filter material bearing spring fasteners, connectors seal cutter mold, fixture pneumatic fluid pressure components Machine Annex fans, ventilation equipment compression, separation equipment reducer, variable speed internal combustion engine testing machine welding machine and accessories brake materials welding, cutting equipment, engineering machinery, construction machinery equipment, metallurgy equipment, mineral processing equipment, metal forming equipment, electronics manufacturing workers control system and electric equipment, business equipment, financial and special equipment and special equipment hotel equipment metal processing industry oil processing machinery parts heat transfer process instrumentation, industrial boilers, air-conditioning refrigeration and accessories shop building materials production and processing equipment, gas equipment, casting machinery and heat treatment equipment, non-destructive testing refrigeration machines rubber machinery equipment, transport equipment, loading and unloading mining mining mining construction equipment, transportation equipment, chemical equipment, crystallization equipment inventory Mixing Equipment Chemical Equipment Chemical laboratory equipment agents joined Chemical Equipment Accessories chemical pipelines and accessories forming chemical equipment chemical equipment Drying Equipment Industrial humidifier crushing equipment mechanical separation equipment volume instrument response equipment and surveying equipment, mining equipment, heat transfer and mass transfer equipment transportation equipment glass processing machinery industry mold processing equipment mold design machine design laser processing machinery and equipment repair boiler installed second-hand second-hand second-hand machine tools Construction Machinery Stock mechanical equipment and industrial supplies projects to join other industrial products, not elsewhere classified agent electronic scales Beijing, Beijing scales, electronic truck scale Electronic Hanging, hanging hook scale value of electronic ground electronic railway scale electronic belt scale, quantitative packing scale said cylinder, liquid Handling pressure scales, electronic scales weighing electronic hook weighing system automation Electronic Truck Scale Electronic table scale, which scales the electronic scale electronic weighing scale forklift management software Electronic Weighing display controller electronic platform balance, electronic platform weighing scales, truck scale weighing small loadometer management software electronic accessories electronic platform balance scale, waterproof scale, counting scale static and dynamic axle load sensor instrument, instruments, large-screen display management system for electronic scale weighing system loader?

塑料机械石油设备包装设备物流公司货运公司航空公司北京电子秤，北京衡器，电子汽车衡电子吊秤包装成型机械印刷设备农业机械食品、饮料加工设备污水处理设备清洗、清理设备节能设备空气净化设备脱硫除尘设备消音降噪设备垃圾焚烧炉发电机、发电机组电动机低压电器高压电器配电输电设备纺织设备和器材皮革加工设备纸加工机械制鞋机械涂装设备造纸设备及配件整熨洗涤设备家具制造机械工艺礼品加工设备陶瓷生产加工机械电脑产品制造设备家电制造设备玩具加工设备其他行业专用设备机床阀门泵传动件液压机械及部件过滤设备过滤材料轴承弹簧紧固件、连接件密封件模具刀具、夹具气动元件液压元件机床附件风机、排风设备压缩、分离设备减速机、变速机内燃机试验机焊接材料与附件制动器电焊、切割设备工程机械、建筑机械选矿设备冶炼设备金属成型设备电子产品制造设备工控系统及装备电热设备商业专用设备金融专用设备酒店设备金属加工工业润滑油机械零部件加工仪器仪表加工换热、制冷空调设备工业锅炉及配件车间设备建材生产加工机械燃气设备铸造及热处理设备无损检测仪器制冷设备橡胶机械输送设备矿业装卸设备矿业输送设备矿山施工设备库存化工设备结晶设备混合设备化工实验设备化工设备配件化工设备代理加盟化工管道及配件化工成型设备化工成套设备干燥设备工业加湿器粉碎设备分离设备机械量仪表反应设备地矿勘测设备传质设备传热设备储运设备玻璃机械行业专用设备加工模具加工模具设计激光加工机械设计机械设备维修安装二手机床二手锅炉二手工程机械库存设备及工业用品机械项目合作工业制品代理加盟其他未分类北京电子秤，北京衡器，电子汽车衡电子吊秤、吊勾秤电子地上衡电子轨道衡电子皮带秤、定量包装秤钢瓶称、液压搬运秤，电子天平电子吊钩秤自动化称重系统电子汽车衡电子桌秤、案秤电子叉车秤电子秤称重管理软件电子称重显示器、控制器电子台秤、磅秤电子平台秤、小地磅汽车衡称重管理软件电子秤配件电子台秤、防水秤、计数秤动静态轴重仪传感器、仪表、大屏显示器电子秤管理系统装载机称重系统？

Speed and tension control of two-motor variable frequency speed-regulating system can be decoupled by the neural network inverse synchronous control method, and high performance control can be obtained by designing linear close-loop adjustors of speed and tension.

实验结果表明系统具有较好的动、静态性能和较强的抗负载扰动的能力，提出的神经网络逆同步控制方法为解决交流多电机系统解耦控制的难题提供了新思路。

AC Induction Motor Control Using the constant V/f Principle and a Natural PWM Algorithm (12 pages, revision A, updated 12/05) Induction motors can only run at their rated speed when they are connected to the main power supply. This is the reason why variable frequency drives are needed to vary the rotor speed of an induction motor.

使用V/F原理的交流电机控制和简单的PWM算法（12页，修订版A，更新时间：05年12月）交流电机在连接到电源时只能以其额定速度运转，所以要改变转速必须改变电源频率。

This paper analyzed the actuality of traditional slip regulating speed motor using on pulverized coal feeder , introduced the application of variable frequency control technique on the pulverized coal feeder of power plant.

本文对传统滑差调速电机在锅炉给粉机中应用现状进行了分析，介绍了变频控制技术在电厂锅炉给粉机中的应用，不仅节约了能源，而且便于操作控制，增强了锅炉燃料供应的可靠性。

The article mainly introduces the application of variable speed drive technology in flyer frame machine, discusses the effect of four-motor drive.

本文主要介绍了变频调速技术在粗纱机上的应用概况，论述了粗纱机采用4电机传动的效果。

Based on the research on the theory and technology of dual-PWM variable frequency AC motor control, a design of dual-PWM variable frequency AC motor control system which has factor control loop rectifier and slip frequency speed regulator is proposed.

本文在总结和研究当前双PWM变频调速基础理论和常见技术的基础上，设计并研究了一种基于DSP的整流侧功率因数闭环、逆变侧转差频率控制的双PWM异步电机变频调速系统。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。