I designed the digital multi-function human-computer interaction of arc welding INVERTER power system
标签: multi-function human-computer interaction designed
上传时间: 2017-06-24
上传用户:wang0123456789
pulse width modulation pwm of multilevel INVERTER
标签: modulation multilevel INVERTER pulse
上传时间: 2017-07-30
上传用户:xlcky
pwm of multilevel INVERTER poulse width modulation
标签: multilevel modulation INVERTER poulse
上传时间: 2014-01-01
上传用户:czl10052678
Space-Vector PWM Technique for Two-Phase INVERTER-Fed Two-Phase Induction Motors
标签: Two-Phase Space-Vector INVERTER-Fed Induction
上传时间: 2013-12-18
上传用户:时代电子小智
为解决直流逆变交流的问题,有效地利用能源,让电源输出最大功率,设计了高性能的基于IR2101最大功率跟踪逆变器,并以SPMC75F2413A单片机作为主控制器。高电压、高速功率的MOSFET或IGBT驱动器IR2101采用高度集成的电平转换技术,同时上管采用外部自举电容上电,能够稳定高效地驱动MOS管。该逆变器可以实现DC/AC的转换,最大功率点的跟踪等功能。实际测试结果表明,该逆变器系统具有跟踪能力强,稳定性高,反应灵敏等特点,该逆变器不仅可应用于普通的电源逆变系统,而且可应用于光伏并网发电的逆变系统,具有广泛的市场前景。 Abstract: To solve the problem of DC-AC INVERTER, and to utilize solar energy more efficiently, the design of maximum power point tracking INVERTER based on IR2101 was achieved with a high-performance, which can make the system output power maximum. SPMC75F2413A was adopted as main controller. IR2101 is a high voltage, high speed power MOSFET and IGBT driver. It adopted highly integrated voltage level transforming technology, and an external bootstrap capacitor was used, which could drive MOS tube efficiently and stably. Many functions are achieved in the system, such as DC/AC conversion, maximun power point tracking, etc. The actual test result shows that the INVERTER system has characteristics of strong tracking ability, high stability and reacting quickly. The design can not only be used in ordinary power INVERTER system, but also be used in photovoltaic power INVERTER system. The design has certain marketing prospects
上传时间: 2013-11-17
上传用户:lliuhhui
光伏发电是未来新能源发电重要方向之一,而光伏变流器是光伏发电系统的核心。介绍一种基于微网理念的光伏变流器设计。以该变流器为核心的光伏发电系统可以看做一个小型的微网系统。该系统能根据外部电网情况,工作于并网模式和离网模式。介绍了该系统的各个组成部件的设计以及变流器主电路部分器件的选型。最后,由实验样机进行测试。试验结果验证了电路拓扑结构及控制方案的可行性,也说明了系统参数设计方法的正确性。 Abstract: Solar Photovoltaic generation is an important direction of new energy power generation in the future,while photovoltaic converter is the core of photovoltaic generation system. This paper deals with a study on photovoltaic INVERTER based on the concept of microgrid. This paper describes a system whose core component is the photovoltaic INVERTER,can work on grid-connected mode or run independently according to the external situation. The paper simply describes the main components of the system. At last,the prototype was produced and tested. Test result has proved feasibility of circuit topology structure and controlling scheme and shown correctness of system parameters.Key words: PV INVERTER; microgrid; off-grid; storage battery
上传时间: 2014-12-24
上传用户:Shaikh
IT8512电子负载用途:◆生产线的快速测试,如:开关电源、电源适配器、充电器、电源模块、LCD INVERTER、LIPS等;◆实验室、研发、计量检定部门对上述产品的测试检定;◆产品老化测试。
上传时间: 2013-10-30
上传用户:123454
对于传统的跑步机无法联机组网,保存历史数据,实时调试等问题,介绍了一个由多台跑步机通过RS-232串行总线与上位机相连组成的跑步机联网系统。系统采用W77E58作为下位机核心控制器件,它具有双串行通讯端口,其中一个串口用于与变频器通讯,另一个串口则与上位机相连,构成跑步机网络。 Abstract: The traditional running machine can not be connected to a network, saving historical data, real time debug etc.In this paper,a new network system which is composed of running machines connected by a RS-232 communication bus is introduced.In the system,W77E58 is used as a core control unit.W77E58 has two serial ports,one is connected to the INVERTER and the other is connected to the PC. Thus a network appears.
上传时间: 2014-12-26
上传用户:哇哇哇哇哇
基于变频调速的水平连铸机拉坯辊速度控制系统Frequency INVERTER Based Drawing RollerS peedC ontrolSy stem ofHorizontal Continuous Casting MachineA 伟刘冲旅巴(南 华 大 学电气工程学院,衡阳421001)摘要拉坯辊速度控制是水平连铸工艺的关键技术之一,采用变频器实现水平连铸机拉坯辊速度程序控制,由信号发生装置给变频器提供程控信号。现场应用表明该控制系统速度响应快,控制精度高,满足了水平连铸生产的需要。关键词水平连铸拉坯辊速度程序控制变频器Absh'act Speedc ontorlof dr awingor leris on eo fth ek eyte chnologiesfo rho rizontalco ntinuousca stingm achine.Fo rth ispu rpose,fr equencyco nverterisad optedfo rdr awingor lersp eedp rogrammablec ontorlof ho rizontalco ntinuousca stingm achine,th ep rogrammableco ntorlsi gnalto fr equencyc onverteris provided场a signal generator. The results of application show that the response of system is rapid and the control accuracy is high enough to meet thedemand of production of horizontal continuous casting.Keywords Horizontalco ntinuousc asting Drawingor ler Speedp rogrammablec ontrol Ferquencyin verter 随着 现 代 化工业生产对钢材需求量的日益增加,连铸生产能力已经成为衡量一个国家冶金工业发展水平的重要指标之一。近十几年来,水平连铸由于具有投资少、铸坯直、见效快等多方面的优点,国内许多钢铁企业利用水平连铸机来浇铸特种合金钢,发挥了其独特的优势并取得了较好的经济效益〔1,2)0采用 水 平 连铸机浇铸特种合金钢时,由于拉坯机是水平连铸系统中的关键设备之一,拉坯机及其控制性能的好坏直接影响着连铸坯的质量,因此,连铸的拉坯技术便成为整个水平连铸技术的核心。由于钢的冶炼过程是在高温下进行的,钢水温度的变化又容易影响铸坯的质量和成材率,因此,如何能在高温环境下控制好与铸坯速度相关的参数(拉、推程量,中停时间和拉坯频率等)对于确保连铸作业的进一步高效化,延长系统的连续作业时间十分关键。因此,拉坯辊速度控制技术是连铸生产过程控制领域中的关键技术之- [31
上传时间: 2013-10-12
上传用户:gxy670166755
(1)变换模块 本模块包含两部分内容:利用 反变换规则将 坐标系下的两相电流转换成三相电流;利用间接矢量控制,得到转子角位移,公式如下(2) 电流滞环控制器(Hysteresis current controller)模块(3) 电压源型逆变器(Voltage sourse INVERTER,VSI)模块 (4) 变换模块(5) 感应电机(IM)模块 该感应电机模型是基于交流电机的电路方程、转矩方程以及运动方程建立起来的。该仿真模块为一个三输入、六输出的系统子模块。输入为 坐标系中定子电压,输出则是 坐标系中的转子电流和转子磁链,以及输出的转矩。(6) 电流反馈模块(7)速度控制器模块
上传时间: 2014-03-10
上传用户:yy541071797