变频器在精密挤出机械上的应用

本文介绍安邦信G11变频器在精密挤出机械上的应用，讨论了精密挤出机械的系统要求及安邦信G11变频器在精密挤出机械上的良好性能。     

高压变频器在胜利油田供水公司耿井水厂给水泵中的应用

本文着重介绍了国产多电平高压变频器在胜利油田供水公司耿井水厂的应用情况，应用结果表明，采用国产高压变频器对水厂的供水泵设备进行调速节能改造，具有较高的技术进步和经济效益。     

高压变频器在湛江电厂4#凝结水泵上的应用

本文重点介绍了高压大功率二极管中性点箝位三电平技术变频器的工作原理和主要技术特点，结合湛江电厂现场的运行工况进行节能分析，具体分析安装变频器后给电厂带来的好处和直接经济效益。     

通过GPRS实现高压变频系统的远程监控

介绍了通过GPRS实现远程高压变频器与本地数据服务器实时连接监控的方案。现场数据通过GPRS传输到本地服务器上显示、处理、存储，也可以进行远程故障诊断，在必要时本地操作员也可以对远程变频器进行控制。     

High Performance CMOS Analog Arithmetic Circuits

Unique designs for CMOS analog arithmetic circuits are presented which perform addition (V₁ + V₂), subtraction (V₂ – V₁), add/invert –(V₁ + V₂), and multiply (V₁ × V₂). The circuit operation is based on the inherent square law of MOS transistor drain current when operating in the saturation region. Key features include: good linearity and accuracy, single ended voltage inputs and output, wide input and output range and no input bias voltages. The circuits can be directly coupled (no buffer) and serve as basic building blocks for analog signal processing implementations such as analog filters and adaptive equalizers. All circuits were implemented in 1.2 m CMOS technology.     

CMOS Analog Implementation of a Discrete-Time 9-Tap FIR Filter with Circular Buffer Architecture

This paper presents the design and simulation of a 9-Tap CMOS Analog Discrete-Time Finite Impulse Response (FIR) Filter system. This unique design features a Circular Buffer Architecture which achieves high sampling rate that can be easily expanded to improve speed and extended to higher order filters. Novel area-efficient four quadrant CMOS analog adder and multiplier circuits are employed to respond for high frequency and wide linear range inputs. The layout for all circuits has been realized using the design tool MAGIC with a 1.2 m CMOS process. The performance for each circuit and the whole system are characterized using HSPICE simulation based on the extracted MAGIC netlist. The 9-tap filter was designed to achieve 5 MHz sampling rate. The implemented design requires a total chip area of 1690.9 m by 2134.2 m and ±5 volt power supply.     

IGBT模块的一种驱动设计

介绍了光电耦合器件HCPL-3120和HCPL-316J的功能和特点.三相电压型逆变器的每相均由上下桥臂(两个IGBT)组成,采用HCPL-3120驱动IGBT模块(BSM10GP120)的上桥臂,采用HCPL-316J驱动IGBT模块的下桥臂.HCPL-316J具有过流、欠压保护功能,能对IGBT模块提供及时保护.实验证明,该驱动方法具有较高的稳定性和良好的保护功能.     

高压变频器助力华能邯峰电厂节能增效

本文主要介绍HARSVERT—A多电平型高压变频器助力华能邯峰电厂凝结水泵节能增效情况，结果表明，采用HARSVERT-A多电平型高压变频器对凝结水泵进行调速节能改造，具有投资省，见效快等特点。     

变频器在液位自动控制中的应用及其节能效果

变频调速器是一种高效节能调速装置，它以DSP或微处理器为核心，为电动机运行多种电气控制和报警功能，保障设备安全，延长使用寿命。特别是它可以根据设定信号调节电动机转速，实现生产自动控制，节电效果显著，可有力地促进企业节能工作的开展，因而在电机供电控制中得到广泛应用。下面以我厂催化装置中的轻柴油泵为例简单说明控制调速策略。     

一起多传动变频器故障的处理过程

本文介绍一起ABB多传动变频器故障的处理过程。