基于S7_1200的多目标动态电梯群分区算法研究

为优化群控方法,提高电梯运行效率,起到节能减排作用,基于六部十层群控电梯模型,提出一种基于S7_1200的多目标电梯群分区算法。该算法实时计算、动态分析静态分区电梯台数需求、各电梯在各区域的评价值,实时监测并判断各电梯最优区域分配,实现动态电梯群区域分配。介绍了电梯群控制系统拓扑结构、算法的设计思想、算法结构以及实现,最后利用电梯仿真系统(EES)验证算例,证实了该算法的可行性、合理性和优越性。     

基于呼叫识别的高层电梯控制策略

为了提高电梯控制系统程序代码的通用性,降低高层电梯系统的控制难度,提出了高层电梯的一种基于楼层呼叫识别的控制策略,建立了以层为基础的电梯运行的动态数学模型,在此基础上,动态识别出电梯的各种呼叫状态,利用这些呼叫状态作为电梯定向、升降状态和停层的转移条件,成功的将复杂的动态过程简化为静态处理,实现容易,大大降低了系统控制的复杂性,提高了通用性.     

LPC2368在电梯控制系统中的应用

阐述了嵌入式ARM7微控制器LPC2368在电梯控制系统中的应用,对控制系统的外围硬件接口电路、LPC2368的寄存器配置与初始化做了详细的介绍,并简要说明了ADS及AXD集成开发调试环境的用法,与传统电梯控制系统相比,采用LPC2368作为主控制器具有稳定可靠、调试方便等优点。     

Comparison of Linear Switched Reluctance Machines for Vertical Propulsion Application: Analysis, Design, and Experimental Correlation

This paper presents the comparison of four linear switched reluctance machines (LSRMs) as possible candidates for application in vertical elevators. Linear induction and linear synchronous machines have been presented and experimentally tested in vertical elevators. In this paper, four longitudinal LSRM configurations are presented and designed to operate as propulsion actuators in a vertical elevator prototype. Two of the four configurations have been presented earlier in horizontal propulsion experiments, and a third one has been proposed for application in vertical elevators. All four LSRMs are designed for similar static force profiles to allow for their comparison. The designed LSRM configurations are compared by using finite-element analysis and dynamic control simulations. The stator, translator, and copper winding weight and dimensions, footprint area, active material weight, normal forces and payload capabilities for all four configurations are contrasted. The configuration with the highest payload capability is chosen for implementation in an experimental prototype. The prototype vertical elevator is 1.27 m tall with a 1-ft-tall elevator vehicle with no counterweights and uses two LSRM setups on each side. The experimental correlation of propulsion force and inductance is presented to validate the theoretical design method used in this research.      

一种基于多规则加权的群控电梯模糊控制算法

提出了一种基于多规则加权的群控电梯模糊控制算法,阐述了群控电梯模糊控制系统的工作原理及结构,证明了此模糊算法的可行性和有效性,指出了其在提高电梯利用效率等方面的作用。     

基于ARM微处理器的电梯智能监控系统的设计

基于嵌入式ARM微处理器技术、CAN总线技术和组态软件MCGS,设计了一种适用于不同控制系统的电梯智能监控系统。该系统能够进行数据采集,实时地记录电梯的各种运行参数和监控电梯的运行状态,并具有故障报警、故障诊断和远程监控等功能,可实现电梯的集中化和智能化管理。     

Safe electrical design of mine elevator control systems

A mine elevator recently experienced an ascending-car overspeed accident, resulting in serious injuries to four passengers. Although the four miners laid down on the floor prior to impact, the miners struck the ceiling of the elevator car as it collided into the overhead structure at an estimated speed four times faster than normal. Several electrical design precautions can be implemented to prevent elevator control system failures. This paper examines safe electrical design of elevator control systems. Supplemental circuits and devices which improve the safety integrity and maintenance of the elevator control system are presented. These circuits and devices provide protection that eliminates the potential hazard and significantly reduces the possibility of a mine elevator accident     

Converter Using SiC‐MOSFET for Ultra‐High‐Speed Elevator

In this study, we developed a converter based on SiC (Silicon Carbide)‐MOSFET for use in ultra‐high‐speed elevators, with a reduced volume of 15% compared with the conventional converter. We succeeded in reducing the power loss of the converter unit by 56% compared to the conventional converter in one round trip under high temperature condition. Recently, because of their useful characteristics, wide‐gap semiconductors, such as SiC and GaN, have gained considerable attention for use in various applications in the power electronics systems. Therefore, we studied the use of a converter in elevator systems based on SiC‐MOSFET. We used a 1200 V/800 A SiC‐MOSFET module for the converter unit. We developed a prototype of the converter unit and the control panel by applying for the SiC‐MOSFET module for an ultra‐high‐speed elevator. As a result, the setting area of the control panel (main part) becomes less than 43% of the conventional panel. We tried to demonstrate the working of a 68‐kW elevator by applying the prototype control panel. Because of the characteristic of the switching loss of SiC‐MOSFET, the power loss of the converter unit has almost no dependence on temperature. An energy‐saving effect of approximately 17% was achieved in the total elevator system in one round trip under high‐temperature condition.     

CAN总线电梯控制系统的研制

为了解决传统电梯控制系统可靠性低、扩展性差和维护困难等问题,提出了一种基于CAN总线的模块化电梯控制系统解决方案。以PIC18F458微处理器为核心,应用CAN总线设计了由主／从网络构成的8层电梯的控制系统的软、硬件。试验结果证明,该控制系统安装、调试和维护方便,运行可靠,智能化程度高,扩展能力强。     

基于呼叫识别的电梯高速模式控制策略

为了实现高速电梯的平稳停层和准确停层,避免出现急停或停层不到位的情况,提高电梯的安全性、舒适性及运行效率,建立了以层为基础的电梯动态二进制数学模型,提出了电梯的一种基于楼层呼叫识别的高速模式控制策略,只需对呼叫信号进行简单的运算与处理,就能提前得到电梯的停层信号,为平稳停层和准确停层做好准备,成功的将复杂的动态过程简化...     

通用型电梯无线远程监控系统

当前,电梯厂商开发出的专业监控系统,不但不能兼容其他品牌电梯,且多数通过有线传输,监控系统的价格也比较昂贵。基于这个市场痛点,设计开发一种基于GPRS/CDMA的电梯无线远程监控系统。该系统可以安装在本地或异地来远距离监测电梯,适合所有类型电梯,无线组网不受地域限制,极大的提高了电梯运行管理,保障人民的生命财产安全。     

Optimum control scheme for the maximum efficiency drive of linear synchronous motor used for ropeless elevator

Our research group at Musashi Institute of Technology is currently concentrating on the improvement of the overall efficiency for driving ropeless elevators using a linear synchronous motor (LSM). Since these elevators are ropeless, counterweights cannot be installed in the system. Therefore, the linear motors must develop a higher thrust force. In addition to the improvement of the efficiency of LSM it is also necessary to develop a high‐efficiency drive control method. Our laboratory is involved in studies on efficiency improvement. In order to design an efficient control system, we believe it is necessary to understand changes of efficiency caused by variations of driving conditions, such as load mass, velocity, and required thrust force. The dynamic control method changing the operating point to achieve the maximum power is known as maximum power point tracking (MPPT). This approach is useful and can be applied to the control of LSM for ropeless elevators. The car cage of a ropeless elevator periodically repeats acceleration and deceleration cycles in the process of ascent and descent motions. The optimum‐minimum‐energy consumption is obtained if the system is always operated at the maximum efficiency, even if the drive conditions change. In this paper, we first discuss the basic characteristics of LSM for ropeless elevators. Then, based on these characteristics, we derive the maximum efficiency loci as a unique combination of a current and a power angle for a specific condition. We also provide a design of the MPPT controller of LSM and analyze results of simulation of driving the LSM using MPPT. © 2006 Wiley Periodicals, Inc. Electr Eng Jpn, 155(3): 70–78, 2006; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20061     

南大傲拓NA200PLC在双速电梯控制中的应用

NA200PLC稳定的软硬件,为电梯的设计、使用提供优越的平台。本文以三层电梯为设计对象,结合三垦VM06系列恒转矩高性能变频器,开发出一套交流双速的PLC电梯控制系统。利用三垦变频器PG卡形成的闭环控制系统,可以使电梯的运行更加稳定、舒适。     

基于LMC058的双电梯控制系统

以运动控制器为核心的电梯控制系统较以PLC为核心的控制系统更有优势。本文以运动控制器LMC058为核心,触摸屏HMIGX03501作为人机界面,伺服驱动器LXM32AU45M2及伺服电机BSH0551T01A2A作为执行机构,构建了双电梯控制模型。该模型资源配置合理,运行稳定。     

基于滚动优化算法的电梯群控设计

在现代高层建筑中,通常都安装了多部电梯,为了提高这些电梯的运行效率和服务质量,需要用电梯群控系统来对其进行合理的调度和管理.达到有效运送乘客,减少电力损耗,实现最优派梯方案.通过对传统电梯群控系统中最常用的呼梯分配方法的不足之处分析后,提出了一种新的智能滚动优化的词度算法,达到多台电梯整体协调优化控制的目的,获得了较好的控制效果.     

基于8031单片机的电梯控制系统设计

本文系统地阐述了电梯控制系统的基本概念,利用8031单片机建立了电梯控制系统的模型,详述了该电梯控制系统的控制逻辑及设计过程。本文对从事电梯维护、改造及设计的工程技术人员有一定的参考意义,并有一定的实用价值及经济效益。     

Field programmable gate arrays

Field programmable gate arrays (FPGAs) are a flexible alternative to custom integrated circuits. They can implement both combinatorial and sequential logic of tens of thousands of gates. Historically, software has been considered “flexible” with hardware its rigid counterpart in system design. All this changed with the shift in the approach to computing: a re-programmable gate array. This gate array is a step above programmable logic devices (PLDs) in complexity. There are several programming technologies available including the static random access memory (SRAM) based FPGA that can be re-programmed any number of times. FPGAs resemble mask-programmed grate arrays (MPGAs) in their modularity, however, they also are capable of field configuration by the user. FPGAs are slightly more expensive in unit cost than application specific integrated circuits (ASICs). But there are no non-recurring engineering (NRE) costs associated with them making FPGAs cost-effective for many applications     

自动顺序启停系统“一键式启停”基础逻辑设计与应用

为实现从设备的单元控制到工艺流程的系统控制再到综合功能的机组控制全自动,即“一键式启停”,需要有符合全过程、全自动要求的逻辑算法作为基础。根据应用实践,探讨了当前顺序控制存在的问题,介绍了单台设备的自动操控、启动备用设备的自动联锁、模拟量调节回路的自举投自动三种用于构建自动顺序启停系统“一键式启停”的基本逻辑算法,并对工作原理进行了说明。以这三种逻辑算法作为组态的自动顺序启停系统在某700MW机组中应用多年,运行情况表明系统设计科学、安全、可靠。     

基于CAN总线及高速RS232总线的电梯群优化控制系统的设计

针对目前电梯群控制系统中存在的通讯线路过多,导致电梯运行稳定性降低、电缆多引起的成本较高、故障率高等缺点,提出了一种新型的基于CAN总线和高速RS232总线的电梯群控制系统的通讯构架,并给出了其硬件设计、用户通讯协议设计、优化控制策略选择及软件控制算法编程。     

基于S3C44B0X处理器的CAN节点的构建方案

基于ARM7TDMI内核的32位嵌入式处理器已经普遍应用于工业控制、汽车电子等各个领域。CAN总线也已广泛应用于这些领域。但大多数数据地址分离总线的处理器并没有在片内集成CAN总线控制器,本文针对该问题给出了一种基于双总线周期的解决方案。本方案选用飞利浦SJA1000器件作为CAN总线控制器,并且对ARM和CAN控制器的总线接口进行了扩展。本文该设计的时序和组合逻辑电路设计进行了分析,最后对CAN控制器在Linux下的驱动移植做了简要介绍。