外文翻译-恒压供水变频器
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复用水泵ATV71变频器参数专家访问√屏幕显示 RUN Term 23.4A +38.3A 管道压力表显示0.38MPA左右1.1简单起动2/3线控制:2线控制宏设置:标准起停/车用户宏设置:YES标准电机频率:50HZ IEC电机额定功率:30KW电机额定电压:380V电机额定电流:55.7A电机额定频率:50HZ电机额定速度:2950rpm最大输出功率:50HZ自整定:完成自整定状态:电阻已整定改变输出相序:A-C-B相序电机热保护电流:72A加速时间:106.1S减速时间:114.1S低速频率:25HZ高速频率:50HZ1.2监视1.2.1输入/输出映像逻辑输入映像PR L11 L12 L13 L14 L15 L16模拟输入映像AI1 +3.741VAI2 -0.008m A逻辑输出映像R1 R2模拟输出映像AO1 +15.328MA1.2.2通信映像命令通道:端子排命令字:0000H ex当前给定通道:端子排频率给定:+38.3HZETA状态字:0437HexWO :-----1.2.3报警信号组: ---1.2.4图形终端频率给定:+41HZ1.2.5内部PID给定:6001.2.6图形终端转矩给定:0.0%1.2.7频率给定:+38.3HZ 1.2.8输出频率:+38.3HZ 1.2.9电机电流:23.4A 1.2.10电机速度:2299rpm 1.2.11电机电压:291V1.2.12电机功率:+29%1.2.13电机转矩:+36.9% 1.2.14电机电压:+379V 1.2.15电机热状态:11%1.2.16变频器热状态:37% 1.2.17功率:1111.2.18电机运行时间:26311h 1.2.19变频器已上电时间:52481h 1.2.20 IGBT报警计时器:0S1.2.21 PID给定 6001.2.22 PID反馈 6031.2.23 PID误差 -31.2.24 PID输出 +38.3HZ1.2.25当前设置组设置组0 1.2.26报警(故障)信号√1.3设置斜坡增量:0.1S加速时间:106.1S减速时间:114.1S低速频率:25HZ高速频率:50HZ电机热保护电流:72A变频器开关频率:2KHZ电流限幅1 :99A电机预磁设置:不预磁低速运行超时:999.9SPID比例增益:1.03PID积分增益:0.05PID微分增益:0.01PID斜坡:99.9SPID最小输出值:0HZPID最大输出值:+50HZ反馈超下限报警:0反馈超上限报警:1600PID误差报警:200电机电流阈值:66A电机频率阈值:50HZ频率阈值2 :50HZ电机热阈值:100%1.4电机控制标准电机频率:50HZ IEC 最大输出频率:50HZ自整定:完成自整定:NO自整定状态:电阻已整定改变输出相序:A-C-B相序电机控制类型:2点压频比UO :0V冷态定子电阻:105Lm额定励磁电流:23.4ALs漏电感:1.69mH转子时间常数:669ms电机额定滑差:0.8HZ 极对数:1电流限幅1 :99A电机噪声抑制:YES电机电压波动限幅:YES瞬态过压限幅优化:10微秒制动单元释能阈值:785V制动平衡:NO1.5输入/输出设置2/3线控制:2线控制2线控制:0/1电平反转:L12LI1设置LI分配LI1 0→1延时:0MS给定模板:标准AI1设置AI1 分配AI1类型:10V电压AI1最小值:0.0VAI1最大值:10VAI1过滤器:0.3SAI1拐点X:0%AI1拐点Y:0%AI2设置AI2分配AI2类型:电流AI2最小值:4.0MAAI2最大值:20MAAI2过滤器:0SAI2拐点X、Y :0%R1设置继电器R1分配器:变频器故障继电器R1延时:0MS继电器R1有效条件:1继电器R1保持时间:0MSAO1设置AO1分配:电机电流AO1类型:电流AO1最小输出值:0MAAO1最大输出值:20MAAO1滤波器:0MS报警信号组1L16=PTC报警□PTC1报警□. □. □. □变频器热阈值到达□1.6命令给定1通道:AI1给定反向禁止:NO停止按钮优先:YES组合模式:组合通道给定2切换:通道1有效给定2通道:AI2给定复制通道1→2 :不复制F1—F4键分配:未设置1.7应用功能给定切换√给定运算斜坡斜坡类型:线性斜坡斜坡增量:0.1S加速时间:106.1S减速时间:114.1S斜坡2切换阈值:0HZ斜坡切换设置:未分配减速时间自适应:有停车设置停车类型:斜坡停车自动直流注入寸动预设速度给定附近加减速给定记忆加减速逻辑输入控制预磁限位开关制动逻辑控制负载测量高速提升PID调节器√PID 反馈分配:AI1给定PID反馈最小值:0PID反馈最大值:1600 PID给定最小值:0PID给定最大值:1600内部PID给定分配:YES 内部PID给定:600PID比例增益:1.03 PID积分增益:0.05 PID微分增益:0.01 PID斜坡:99.9SPID误差求反:NOPID最小输出值:0HZPID最大输出值:+50HZ反馈超下限报警:0反馈超上限报警:1600PID误差报警:200PID积分重设:未分配速度给定分配:未设置自动/手动选择分配:未分配低速运行超时:999.9SPID唤醒误差阈值:0.0。
各种变频器恒压供水参数变频器恒压供水是一种流行的水泵控制方式,它可以根据实际需求自动调节水泵的工作状态,使得水压能够保持在一个设定的恒定水平上。
在各种应用领域中,变频器恒压供水都有着广泛的应用,比如建筑领域、工业生产和农业灌溉等。
下面将介绍一些关于变频器恒压供水的相关参数。
1.额定功率变频器控制的水泵有其额定功率,这是指水泵在标准工况下所能提供的功率。
通常用单位为千瓦(kW)来表示,比如5kW、10kW等。
2.额定电压和额定电流变频器恒压供水系统的水泵通常需要配备相应的电力供应,其额定电压和额定电流是指其正常工作时所需要的电压和电流。
通常情况下,额定电压为单相220V或三相380V,额定电流按具体的功率来确定。
3.变频范围和频率调节精度变频器控制的水泵可以通过调节频率来实现调节水泵的工作状态。
变频范围是指水泵的运行频率范围,通常为0-50Hz或0-60Hz。
频率调节精度是指变频器在设定频率下的精确调节能力,一般为0.01Hz。
4.压力设定范围和压力调节精度变频器恒压供水系统的关键参数是压力设定范围和压力调节精度。
压力设定范围是指变频器能够调节水泵输出的压力的范围,例如0-10bar。
压力调节精度是指变频器在设定压力下的精确调节能力,通常为0.01bar。
5.过载保护和故障保护变频器恒压供水系统通常会具备过载保护和故障保护功能。
过载保护是指当水泵超出额定工作范围时,变频器会自动停机以避免损坏。
故障保护是指当变频器本身出现故障时,自动报警并关机。
6.节能效果和能效等级7.控制方式和参数保存功能变频器恒压供水系统通常具有多种控制方式,包括手动、自动和远程控制等。
同时,系统还会保存用户设定的参数,以便在断电或重新启动之后能够自动加载先前的设定参数。
总结起来,变频器恒压供水系统的参数包括额定功率、额定电压和电流、变频范围、频率调节精度、压力设定范围、压力调节精度、过载保护和故障保护、节能效果和能效等级、控制方式和参数保存功能等。
变频器的英文译名是VFD(Variable-frequency Drive),这可能是现代科技由中文反向译为英文的为数不多实例之一。
(但VFD也可解释为Vacuum fluorescent display,真空荧光管,故这种译法并不常用)。
变频器是应用变频技术与微电子技术,通过改变电机工作电源的频率和幅度的方式来控制交流电动机的电力传动元件。
变频器在中、韩等亚洲地区受日本厂商影响而曾被称作VVVF(Variable Voltage Variable Frequency Inverter)。
1、VVVF 是Variable Voltage and Variable Frequency 的缩写,意为改变电压和改变频率,也就是人们所说的变压变频。
2、CVCF 是Constant Voltage and Constant Frequency 的缩写,意为恒电压、恒频率,也就是人们所说的恒压恒频。
我们使用的电源分为交流电源和直流电源,一般的直流电源大多是由交流电源通过变压器变压,整流滤波后得到的。
交流电源在人们使用电源中占总使用电源的95%左右。
无论是用于家庭还是用于工厂,单相交流电源和三相交流电源,其电压和频率均按各国的规定有一定的标准,如我国大陆规定,直接用户单相交流电为220V,三相交流电线电压为380V,频率为50Hz,其它国家的电源电压和频率可能于我国的电压和频率不同,如有单相100V/60Hz,三相200V/60Hz等等,标准的电压和频率的交流供电电源叫工频交流电。
通常,把电压和频率固定不变的工频交流电变换为电压或频率可变的交流电的装置称作“变频器”。
为了产生可变的电压和频率,该设备首先要把电源的交流电变换为直流电(DC),这个过程叫整流。
把直流电(DC)变换为交流电(AC)的装置,其科学术语为“inverter”(逆变器)。
一般逆变器是把直流电源逆变为一定的固定频率和一定电压的逆变电源。
对于逆变为频率可调、电压可调的逆变器我们称为变频器。
变频器恒压供水变频器恒压供水概述变频器恒压供水就是采用变频器来进行恒压供水的一种设备。
变频器恒压供水是一种新型的节能供水设备。
变频器恒压供水系运用当今最先进的微电脑控制技术,将变频调速器与电机水泵组合而成的机电一体化高科技节能供水装置。
变频器恒压供水以水泵出水端水压(或用户用水流量)为设定参数,通过微机自动控制变频器的输出频率从而调节水泵电机的转速,实现用户管网水压的闭环调节,使供水系统自动恒压稳于设定的压力值:即用水量增加时,频率提高,水泵转速加快;用水量减少时,频率降低,水泵转速减慢。
这样就保证了整个用户管网随时都有充足的水压(与用户设定的压力一致)和水量(随用户的用水情况变化而变化)。
变频恒压供水最简单的方式一台变频器,一个电接点压力表。
变频器设置端子控制,电接点压力表的下静触点和动触点接在变频器的启动端子点上就可以了,水压低于设定,触点接通,变频器按设定斜坡升频,水泵转速上升;当水压达到设定点时,触点断开,变频器按设定斜坡降频。
斜坡设定的合适,变频器就会在设定的水压值附近控制水泵调速,水压波动不大。
变频器恒压供水的组成变频器恒压供水主要由水泵机组、测压稳压罐、压力传感器、变频控制柜等组成,能始终维持压力表压力(即用户管网水压)等于用户设定值。
可用于一般生活或生产供水。
供水系统组成方式有:1、变频供水设备与市政管网并网恒压供水,在供水压力可满足需要时,自动停运全部水泵。
否则,恒压供水设备起动,增大压力满足用水要求。
2、附加小泵或气压罐,为完全消除小流量或零流量供水电耗,可增加辅助小泵或辅助气压罐,当供水压力低时,自动停运主泵,使小泵或气压罐运行。
变频器abb无负压变频给水设备变频器abb无负压变频给水设备是是在HLS变频恒压供水设备基础上开发而来的新型供水设备。
1、节约总投资70%不用建水池或设水箱。
与自来水管道直接连接加压供水。
可充分利用自来水原有的压力。
缩小水泵型号(原来水泵需用60M扬程。
变频器恒压供水系统变频器恒压供水系统概述传统的供水方式离不开蓄水池中的水一般由自来水管网供给,这样有压力的水进入水池后变成了零,造成大量的能源白白浪费。
变频器恒压供水系统是在气压给水设备的基础上开发的一种能直接与自来水管网连接、且对自来水管网不产生任何副作用的成套给水设备。
他取代了蓄水池的和屋顶水箱,能充分利用自来水管网的压力直接或间接供水,避免了能源的二次浪费和水质的二次污染,大幅度节约了基建投资并缩短了施工工期。
变频器恒压供水系统由智能型变频控制柜、稳流罐、水泵机组、仪表、阀门及管路、基座等组成,适用于一切需要增高水压、恒定流量的给水系统。
变频器恒压供水系统设备--技术特点:(1)供水系统的控制对象是用户管网的水压,它是一个过程控制量,同其他一些过程控制量(如:温度、流量、浓度等)一样,对控制作用的响应具有滞后性。
同时用于水泵转速控制的变频器也存在一定的滞后效应。
(2)用户管网中因为有管阻、水锤等因素的影响,同时又由于水泵自身的一些固有特性,使水泵转速的变化与管网压力的变化成正比,因此变频调速恒压供水系统是一个线性系统。
(3)变频器恒压供水系统设备要具有广泛的通用性,面向各种各样的供水系统,而不同的供水系统管网结构、用水量和扬程等方面存在着较大的差异,因此其控制对象的模型具有很强的多变性。
(4)在变频恒压供水设备中,由于有定量泵的加入控制,而定量泵的控制(包括定量泉的停止和运行)是时时发生的,同时定量泵的运行状态直接影响供水系统的模型参数,使其不确定性地发生变化,因此可以认为,变频调速恒压供水系统的控制对象是时时变化的.变频器恒压供水系统优势变频器恒压供水系统经济卫生、节能效果显著,实践证明:使用智能型恒压变频供水设备可节省50%以上的兴建水池费用,与其它供水设备相比,可节电20%~50%;变频器恒压供水系统安装简便、节省占地面积。
给水罐的制造、检验均符合GB150《钢制压力容器》的规定,但因罐内不储存压缩气体,所以不须列入压力容器的管理范畴。
变频器:inverter(日本),AC Driver(欧美),Frequency Converter(欧洲) 变流器:converter整流:rectifying-rectification整流器:rectifier逆变:inverting-inversion逆变器:inverter转矩脉动:torque pulsation矢量控制:Vector Control脉宽调制:PWM(pulse width modulation)正弦波脉宽调制:SPWM(sine pulse width modulation)谐波:harmonic矢量控制:VC(vector control)直接转矩控制:DTC(direct torque control)四象限运行:Four quadrant operation再生(制动):Regeneration (braking)直流制动:DC braking漏电流:leak current滤波器:filter电抗器:reactor电位器:potentiometer编码器:encoder ,PLG(pulse generator)定子:stator转子:rotorPLC常用英文词汇时间:2010-03-20 11:32 来源:未知作者:电气自动化技术网点击:字体设置: 大中小address|[PLC] The location in memory where data is stored. For data areas, an address consists ofa two letter data area designation and a number that designate the word and/or bitlocation. For the UM area, an address designates the instruction location (UM area); for theFM area, the block location (FM area), etc.allocation|[PLC] The process by which the PC assigns certain bits or words in memory for various functions. This includes pairing I/O bits to I/O points on Units.Analog Input Unit|[PLC] A Special I/O Unit that converts external analog input signals to digital input signalsfor the PC. The analog signals can be voltages or amperages.Analog I/O Unit|[PLC] A collective term for Analog Input Unit and Analog Output Unit.Analog Output Unit|[PLC] A Special I/O Unit that converts digital output signals from the PC to analog outputsignals for field devices. The analog signals can be voltages or amperages.Analog Timer Unit|[PLC] A dedicated timer that interfaces through analog signal externally and digital signalsinternally.AND|[PLC] A logic operation whereby the result is true if and only if both premises are true. Inladder diagram programming the premises are usually ON/OFF states of bits or the logicalcombination of such states called execution conditions.BCD|[PLC] Short for binary-coded decimal.BCD calculation|[PLC] An arithmetic calculation that uses numbers expressed in binary-coded decimal.binary|[PLC] A number system where all numbers are expressed to the base 2. Although in aPC all data is ultimately stored in binary form, binary is used to refer to data that isnumerically equivalent to the binary value. It is not used to refer to binary coded decimal.Each four binary bits is equivalent to one hexadecimal digit.binary-coded decimal|[PLC] A system used to represent numbers so that each four binary bits is numerica llyequivalent to one decimal digit.bit|[PLC] The smallest unit of storage in a PC. The status of a bit is either ON or OFF. Fourbits equal one digit; sixteen bits, one word. Different bits are allocated to special purposes, such as holding the status input from external devices, while other bits are available forgeneral use in programming.。
恒压供水变频器设置方法恒压供水变频器是一种用于调节水泵运行频率,实现恒压供水的设备。
它能够根据用户的需求,自动调节水泵的运行速度,保持水压稳定在设定的压力值,从而有效解决了传统供水方式压力不稳定的问题。
下面我们将介绍恒压供水变频器的设置方法,希望能帮助大家更好地使用和维护这一设备。
首先,我们需要明确一些基本的设置参数。
在进行恒压供水变频器的设置之前,我们需要了解水泵的额定流量、额定扬程、额定功率等参数,以及用户所需的最大供水流量和最大供水扬程。
这些参数将直接影响到恒压供水变频器的设置,因此必须要有准确的数据作为依据。
接下来,我们需要进行变频器的基本参数设置。
首先是输入输出设定,包括输入电压、输出电压、输出频率等参数的设定。
其次是PID参数的设定,PID参数是用来调节水泵的运行速度,以保持恒定的水压。
在设置PID参数时,需要根据实际情况进行调整,以达到最佳的恒压效果。
然后,我们需要进行变频器的保护参数设置。
保护参数包括过载保护、短路保护、欠压保护、过压保护等,这些保护参数的设置对于保护水泵和变频器的安全运行至关重要。
在设置这些保护参数时,需要根据水泵的额定功率和电压等参数进行合理的设定,以确保在异常情况下及时停止水泵的运行,避免损坏设备。
最后,我们需要进行恒压供水变频器的调试和运行。
在进行调试时,需要先进行手动模式下的试运行,观察水泵的运行情况和水压的变化,然后逐步调整PID参数,直到达到所需的恒压效果。
在进行运行时,需要定期检查变频器的运行状态和水泵的工作情况,及时发现并解决问题,保证设备的正常运行。
总的来说,恒压供水变频器的设置方法并不复杂,但需要根据实际情况进行合理的参数设定和调试。
只有在正确的设置和使用下,恒压供水变频器才能发挥最大的作用,为用户提供稳定、高效的供水服务。
希望以上内容能够帮助大家更好地了解和使用恒压供水变频器,同时也希望大家能够在使用过程中严格遵守操作规程,确保设备的安全运行。
GDGM-QR-03-074-B/1Guangdong College of Industry & Commerce毕业综合实践报告Graduation synthesis practice report题目:PLC控制的变频-工频双回路恒压供水控制系统的设计(in English) Design of frequency - frequency PLC control double loop constant pressure water supply control system系别:电气自动化系班级:12机电一体化(3)班完成日期:6/2015摘要本设计根据供水要求,设计了PLC控制的变频-工频双回路恒压供水控制系统。
变频恒压供水控制系统由可编程控制器、变频器、水泵机组、压力传感器、工控机等构成。
本系统包含两台水泵电机,它们组成变频循环运行方式。
采用变频器实现对四相水泵电机的软启动和变频调速。
压力传感器检测当前水压信号,送入PLC与设定值比较后进行PID运算,从而控制变频器的输出电压和频率,进而改变水泵电机的转速来改变供水量,最终保持管网压力稳定在设定值附近。
通过工控机与PLC 的连接,采用组态软件完成系统监控,实现了运行状态动态显示及数据、报警的查询。
变频恒压供水技术具有较先进的技术、水压恒定、操作方便、运行可靠、节约电能、自动化程度高等有点。
关键词:变频恒压供水系统;可编程控制器(PLC)目录一、绪论 (1)(一)课题的提出 (1)(二)变频恒压供水系统的国内外研究现状 (1)(三)本课题的主要研究内容 (2)二、控制方案确定及系统的理论分析 (3)(一)变频恒压供水系统控制方案的确定 (3)1.控制方案的比较和确定 (3)2.变频恒压供水概况 (4)(二)变频恒压供水系统的理论分析 (4)1.变频恒压供水系统的节能原理 (4)2.电动机的调速原理 (5)(三)变频恒压供水系统的设计构想 (6)1.变频恒压供水系统的组成和原理图 (6)2.变频恒压供水系统控制流程 (8)3.水泵切换条件 (9)三、系统的硬件设计 (10)(一)主设备选型 (10)1.主设备选型 (10)2.PLC 及其扩展模块的选型 (11)3.变频器的选型 (11)4.水泵机组的选型 (12)5.压力变送器的选型 (12)6.液位变送器的选型 (13)(二)系统主电路分析及其设计 (13)(三)系统控制电路分析及其设计 (14)(四)PLC的I/O端口分配及外围接线图 (16)四、系统的软件设计 (18)(一)系统软件设计分析 (18)(二)PLC程序设计 (19)1.控制系统主程序程序设计 (19)2.控制系统子程序设计 (21)(三)PID控制器参数整定 (30)1.PID 控制及其控制算法 (30)2.PID 参数整定 (31)五、结束语 (33)参考文献 (34)致谢 (35)附录 (36)附录图1主电路图 (36)附录图2控制电路图 (37)附录图3主程序流程图 (38)附录图4主程序梯形图 (39)一、绪论水是生产生活中不可缺少的重要组成部分,在节水节能已成为时代特征的现实条件下,我们这个水资源和电能短缺的国家,长期以来在市政供水、高层建筑供水、工业生产循环供水等方面技术一直比较落后,自动化程度低。
Constant pressure water supply frequency changerThe transistor frequency changer not only overcame has formerly exchanged velocity modulation many shortcomings, moreover the velocity modulation performance might compare favorably with the direct current motor velocity modulation performance. The three-phase asynchronous motor has the service to be convenient, merit and so on price small advantage, power and rotational speed adapt breadth, its frequency conversion velocity modulation technology in the miniaturization, the low cost and the redundant reliable aspect holds the obvious superiority. To the end of the 80's, the alternating current machine frequency conversion velocity modulation technology rapidly develops into a mature technology, it will supply the alternating current machine the labor frequency alternating current supply to turn direct current after the diode rectification, again by component and so on IGBT or GTR module counter will turn the alternating current supply which the frequency might move, will drive the electrical machinery by this power source to move under the speed change condition, and automatic suitable strain load condition. After it changed in the traditional industry the electrical machinery to start only can by the rated power, decide the rotational speed the sole movement way, thus achieved the energy conservation goal. The modern frequency conversion velocity modulation technology applies in the electric power water pump water supply system.Because the frequency conversion velocity modulation has the velocity modula -tion the physical characteristics well, efficiency high, velocity modulation scope -wide, precision high, adjusting character curve smooth, may continual realize, the steady velocity modulation, the volume small, the maintenance simple is conven -ient, the automated level higher a series of prominent merits but time people's favor. When it applies especially in the air blower, the water pump and so on the large capacity load, may obtain the energy conservation effect which other velocity modulation ways is unable to compare. The frequency conversion velocity modulation system main equipment is provides the frequency conversion power source the frequency changer, the frequency changer may divide into exchange - direct current - to exchange the frequency changer and the exchange - exchanges the frequency changer two big kinds, at present domestic mostly uses hands over - is straight - hands over the frequency changer.Has been published since the general frequency changer, the frequency conversion velocity modulation technology obtained the widespread application in each domain. The frequency conversion modulates velocity the permanent water level feed water equipment by its energy conservation, security, high quality merit and so on water supply quality, caused our country to supply water the profession technical equip level to start from the beginning of the 90's to experience a leap. The constant pressure, the permanent water level water supply velocity modula -tion system realization water pump electrical machinery step less speed regulation, rests on with the water level change regulator system movement parameter, in the water consumption change regulator system movement parameter, changes when the water consumption maintains the hydraulic pressure to be constant and the water level constantly by satisfies the water used request, is now most advanced, the reasonable energy conservation water supply system. Obtained the very big development in the practical application. Along with the electric power electronic technology rapid development, the frequency changer function more and more is also strong. Fully uses each kind of function which in the frequency changer sets, to the reasonable design frequency conversion velocity modulation constant pressure feed water equipment, reduces the cost, guaranteed aspect and so on product quality has the extremely vital significance.In the short several years, the frequency conversion velocity modulation constant pressure water supply system experienced the developing process which consummated gradually, the early time has pumped the velocity modulation constant pressure system to pump only the velocity modulation system to replace gradually. Although only pumps the velocity modulation system design simple reliable, but because only pumps the electrical machinery depth velocity modulation to create the water pump, the electrical machinery operating efficiency lowly, but pumps the velocity modulation system investment more to save, the operating efficiency is high, by the actual proof is the most superior system design, very quickly develops into the leading product. The Semen’s frequency changer design level compares with various brands frequencychanger, the function is formidable, impeccable! If again can from the design consider will service convenient to the future, The nature and enhanced the components in the manufacture selection the quality is most ideal.The Semen’s frequency changer rectification unit pressure resistance is 1200V. If can use pressure resistance 1600V the rectification unit, I thought can enhance the stability greatly and reduce the failure rate.Guards against the disturbance the measure to wait for strengthens, Semen’s frequency changer sometimes can but control because of the disturbance question the host the board or I/The O port burnt.The constant pressure water supply series frequency conversion voltmeters is for the air blower, pumps kind, current capacity and the special-purpose frequency conversion voltmeters the pressure control characteristic specially and so on air compressor which but develops. This aircraft type has the general frequency changer the basic function.This product design had mainly considered the energy conservation and the automated request, in sets at the automatic energy conservation, PID, simple PLC and function and so on RS485 communication connection, may facilitate and PLC, the computer or the main line carries on the communication, the convenient customer operation and the monitoring, at the same time this company also specially developed one kind to process the constant pressure water supply specially the control panel, might conveniently be used together with the far biography pressure gauge.First, frequency conversion constant pressure water supply characteristic:1st, the frequency conversion constant pressure for the hydro-energy automatic 24 hour maintenances constant pressure, and automatically starts the relay pump according to the pressure signal, the step less -adjustment pressure, the water supply quality is good, compares with the traditional water supply, cannot create the pipe network to burst and the water cock resonance effect.2nd, the start is smooth, reduces the electrical machinery water pump the impact, lengthened the electrical machinery and the water pump service life, has avoided in the traditional water supply impingement phenomenon.3rd, uses the frequency conversion constant pressure water supply protection function completely, the movement is reliable, has owes presses, haspressed, has flowed, protection function and so on the heat.5th, may according to the user need, choose each kind of attachment function, for example: The electrical machinery fixed time takes turns, function and so on dormancy.Second, principle of work:The frequency conversion constant pressure water supply system uses a potentiometer hypothesis pressure (also to be possible to use kneading board interior hypothesis pressure), uses a pressure transmitter (feedback is 4-20mA) examines in the pipe network the pressure, the pressure transmitter sends in the signal the frequency changer PID return route, after PID return route processing, sends out a water volume to increase or the reduced signal, controls the motor rotational speed. Like in certain delay time, pressure insufficiency or oversized, then does work the frequency through PLC/The frequency conversion cut, causes the actual pipe network pressure to be consistent with the hypothesis pressure.Moreover, along with the water consumption reduction, the frequency changer automatic reduction output frequency, has achieved the energy conservation goal. Third, applicable scope:Uses the frequency conversion constant pressure water supply, has the highly effective energy conservation, the pressure stable, movement reliable, operation simple, installment convenient, occupying a land area of few, the noise is low, does not have the pollution, invests lowly, benefit higher merit. Is suitable specially for:1. Place the and so on guesthouse, office, apartment, inhabitant plot life gives the heat of hydration water heating system.2. The high-rise construction, the large-scale civil construction fire prevention gives the aqueous system.3. Industry and mining production enterprise.4. Each kind of running water factory.恒压供水变频器晶体管变频器不但克服了以往交流调速的许多缺点,而且调速性能可以和直流电动机的调速性能相媲美。