So that , we will get a high exporting power source according to the step - by - step magnified circuit , the peak power output can reach 300kw with variable frequency and variable voltage output 这样逐级放大得到一个功率很大电源,其最高输出功率可以达到300kw ,而且能够调节频率和电压。
Chapter iv summarizes all kinds of dimming methods and studies the characteristic of the lamp under dimming . experimental results of variable switching frequency scheme and variable voltage scheme are provided to analyze their strongpoint and drawbacks 论文第四章对各种调光方法进行了综述,研究了调光工作下灯的工作特性,并对最常用的调频调光和调压调光进行了实验研究,分析了各自的优缺点。
Win2000 passenger elevators without machine room or with mini machine room represent three most advanced control technologies for elevators in the current world , i . e . , synchronous gearless towing machine , microcomputer series communication , and variable frequency , variable voltage and variable Win2000系列无机房小机房电梯采用了当今最先进的电梯控制技术的三个代表:同步无轮曳引机微机串行通信调频调压调速vvvf控制。
In the design study of variable voltage and variable frequency systems , the thesis focused on the exploration of the main sources of the electromagnetic interference , the main path of the electromagnetic interference and the sensing unit in the vvvf system 在变频调速系统电磁兼容设计研究中,本文分析了变频调速系统的主要干扰源,主要干扰途径以及敏感源。并针对各干扰源提出了相应的兼容设计方法如接地,屏蔽和隔断。
Win2000 bed lift is of personalized design , ultra - stable operation , to offer quietness and comfortableness to the greatest extent to patients with warm colors . it is provided with variable voltage variable frequency device , to produce the best operating curve in accordance with the physiological requirements of human body , to show make the safe , comfort , stable and excellent perfomance in the whole process during the operation of the lift from start , acceleration , deceleration to stop . optional cut - off emergency leveling device may be equiooed at the demand of user to ensure that the passengers inside the lift can be rescued in case of power cut - off accident Win2000系列病床电梯以人性化的设计,超平稳的运行,给予病患者最大程度的安静舒适增添温馨的色彩。采用先进vvvf调频调压调速装置,按人体生理要求由电梯优化产生最佳的运行曲线,使电梯的起动加速减速停止过程处处体现安全舒适平稳的卓越性能。根据用户要求可选装停电应急平稳装置,确保以外停电时,被困电梯内的乘客能及时获得解困。
The variable voltage variable frequency ( vvvf ) as the primary mode of current energy - conservation , technological process improvement which raises product quality and improves environment that worsen constantly , and technical progress advancement , applies extensively to various kinds of large - scale automatic production lines , as well as industrial motor control system 变频调速作为当今节能,改善工艺流程以提高产品质量和改善不断恶化的环境,推动技术进步的一种主要手段,广泛应用于各种大型自动化生产线,以及各类控制电机速度的生产过程中。
Variable voltage and variable frequency ( vvvf ) inverter control technology applied by ford passenger lift extends the utilization from the elevators drive system to the door machine system , plus its matching none link lever synchronous belt type door machine structure , it results in the more smooth sensitive and secure door open and shut . the passengers feel the doubled warmth in entering into and exiting the elevators 福德乘客电梯所应用的变压变频( vvvf )逆变器控制技术,从电梯驱动系统延伸运用到了门机系统中,加上与之相匹配的无连杆同步带式门机结构,使电梯门的开启和关闭更加平稳、灵敏和安全,令进出电梯的乘客倍感亲切。
Thanks to the support of the national natural science foundation of china under grand no . 50277036 for " the pulse electromagnetic fields and system - level em radiation of electric vehicles " , this thesis concentrated on the design of the variable voltage and variable frequency ( vvvf ) system and the development of a genetic algorithm for vector optimal design problems . the work includes mainly four parts : a brief introduction of the frequency - converter , the emc design of the vvvf system and the national standard of the electromagnetic interference of the vvvf system , the study of global search optimization algorithms , and an improved genetic algorithm called emigration genetic algorithm for multi - objective optimal problems 在国家自然科学基金资助项目《电动汽车脉冲电磁场与系统级辐射的研究》的工作基础上,本文对电动车电磁辐射关键部分? ?变频调速系统的电磁兼容性设计以及在电磁兼容性设计中涉及到的电磁系统的多目标优化方法进行了系统的分析和研究,其核心内容包括:变频器工作原理;变频调速系统电磁兼容性设计及变频调速系统电磁兼容标准;随机类全局优化算法研究;提出了一种改进的遗传算法命名为迁徙遗传算法。
Mathematical model of sensorless induction motor and corresponding control algorithm have also been setup . in the paper , a new variable voltage variable frequency system has been developed based on the study above , and digital signal processor , tms320lf2407 , which is specially designed for motor drive system in practice , is also used to debug the system 本文对异步电机控制系统着重进行算法和控制软件方面的研究,在此基础上根据异步电机变频调速控制的特殊工况,开发出了一套高性能的异步电机变频调速的矢量控制算法和软件。
Several semi - active control algorithms used in the semi - active suspension system with mr dampers are proposed and developed including the " on - off " voltage controller , the continuously linear variable voltage controller , the modulated continuously linear variable voltage controller based on " sky - hook " damping concept and the hybrid controller based on the combination of " sky - hook " damping concept and " ground - hook " damping concept and the fuzzy logic controllers using measurements of the relative displacement between the sprung and unsprung mass or the absolute acceleration of the sprung mass as the input variables of fuzzy logic controllers . the simulation models were prepared in matlab ? simulink ? fuzzy toolbox programs . the experiment setup of the semi - active suspension system with mr dampers in the lab has been designed and developed 根据磁流变阻尼器特性和对悬架系统动力学特性的规律性研究,为磁流变阻尼器设计了基于“天棚”阻尼控制概念的“ on - off ” 、线性连续和修正的线性连续控制策略,基于“地棚”阻尼控制概念的磁流变阻尼线性连续控制策略, “天棚”阻尼和“地棚”阻尼控制概念线性组合起来的磁流变阻尼混合控制策略,根据模糊控制原理设计了以簧载质量和非簧载质量间相对位移或簧载质量加速度分别作为输入变量的模糊逻辑控制器用于磁流变阻尼半主动悬架的智能控制。