[雙語翻譯]plc外文翻譯--plc變頻控制的水泵系統(tǒng)（英文）

1、JJMIE Volume 3, Number 3,September 2009 ISSN 1995-6665 Pages 216 - 221 Jordan Journal of Mechanical and Industrial Engineering Water Pumping System with PLC and Frequency Control Aka a,* b b cDepartment of Mechanical an

2、Abstract yleh Ali , Mohammed Al_Soud , Essam Abdallah , Salah Addallah aDepartment of Electrical Engineering, Tafila Technical University, Tafila, Jordan bDepartment of Mechanical Engineering , Al- Balqa Applied Un

3、iversit y, Amman, Jordan c d Industrial Engineering, Applied Science University, Amman , Jordan In this study controlled thod of control of pumping flow rate is achieved by means of integrated programmable logic control

4、ler (PLC) and frequency inverter (FI). PLC main function is to determine the required flow rate levels and the related time intervals of the flow rate hold time. (FI) is used capabdecrepoint SIMUdynamreserved Keywords:

5、 PLC; Frequency Control; Water Pumping System; Dynamic Characteristics.water pumping system is designed, constructed, and modeled. The programming meto control the dynamic change of temperature between various operating

6、points. The designed system shows the ility for full control of pumping flow rate from zero to maximum for any required range of time in case of increasing or asing the pumping flow rate. All variables of the system will

7、 be changed gradually until reaching their needed working s.The mathematical model of water pumping system with PLC and frequency control is built based on MATLAB- LINK . A test rig built and an experimental study was pe

8、rformed. From the analysis of the experimental starting ic characteristics of water pumping system and modeled characteristics, it was noticed that they are very similar. © 2009 Jordan Journal of Mechanical and Indu

9、strial Engineering. All rights 1. Introduction * in the modern manufacturing systems may be used as main parts in many industrial activities The indus [1].In consu centri analy syste face dynam curre and e A induc

10、 consi one c comm gener shift contr opera requi using high Pumping equipments, like chemical industries, food industries, etc. automation of the pumping processes in those tries will certainly lead to improve their pe

11、rformance Jordan about 18% of generated electrical power is med by three-phase-induction motors driven fugal pump in water pumping stations. From the sis of the working conditions of water pumping ms, it is notic

12、ed that there are many problems, which the work of such systems, as hydraulic hammers, ic stresses in mechanical parts, high starting nts in the there-phase -motor driven centrifugal pump, nergy saving problems [2].

13、 new single-switch parallel resonant converter for tion heating was introduced in [3].The circuit sts of an input LC-filter, a bridge rectifier, and only ontrolled power switch. The switch operates in a soft unicatio

14、n mode and serves as a high frequency ator. A voltage-fed resonant LCL inverter with phase control was presented in [4].It was observed that the ol strategy offered advantages in the megahertz ting region, where a co

15、nstant switching frequency is red. The inverter steady state operation is analyzed fundamental frequency analyses. A cost-effective efficiency inverter with phase–shifted pulse * Corred for medium power (5- 30) kW

16、induction heating applications is discussed in [5]. Topca sented in [6]. TinstE v ac re le te P Pph m ntal study was performed to inves cotr in fiex Pistiesponding author. akayleh_em@yahoo.com. modulation scheme was p

17、roposhe proposed inverter accomplishes soft switching peration over a wide power regulation range. The actual ower conversion efficiency reached was 96.7%. A control method of reducing the size of the dc-link pacitors o

18、f a converter-inverter system was pre he main idea is to utilize the inverter operation statusthe current control of the converter. This control rategy is effective in regulating the dc-voltage level. ven the dc-link cap

19、acitor is arbitrarily small and the load aries abruptly. In [7], a method was proposed to curately predict the minimum required temperature covery, considering repeatability and accuracy of the ak detector by investi

20、gating the relation between mperature recovery time and applied pressures using LC system. A methodology was demonstrated to design a LC program that organizes the relation between the ysical inputs and outputs of the

21、 pumping tools in anufacturing systems. In [8], an experime tigate the effect of using two axes tracking with PLC ntrol on the solar energy collected. The two axes acking surface showed better performance with an cre

22、ase in the collected energy up to 41% compared to the xed surface. This study seeks to design, model, and periment of fully automated water pumping system with LC and frequency control, where the main PLC functionto co

23、ntrol the required flow rate levels and the related me intervals of the pumping flow rate hold time. FI is© 2009 Jordan Journal of Mechanical and Industrial Engineering. All rights reserved - Volume 3, Number 3 (IS

24、SN 1995-6665) 218Figure 4. Speed vs. time according to the different inserted control laws. From the analysis of starting curves in Figures 3 and 4, it can ut signal parameters of the water pumping system includin

25、g with Consi decrea secon neglec secon Fig functi freque after thatbe noticed that in case of starting with step inp , all output speed and flow rate exhibited a high peak value fluctuation until reaching the rated

26、 values. dering other control laws, the range of vibrations sed as time increased. Setting the starting time to 3 ds exhibited very small oscillations that can be ted. While setting the starting time to more than 3

27、 ds exhibit no oscillations [12, 13]. ure 5 shows the variation of programmed frequency on of time. The control law was started from the base ncy of 0 Hz to reach 12.5 Hz with in 10 seconds, , the frequency will be

28、stable for 15 seconds, then equency will be changed softly from 12.5 Hz to the z through 10 seconds, later the frequency will be for 15 seconds, then the frequency will be changed from 25 Hz to 37.5 Hz through 10 Seep,

29、 after that equency will be stable for 15 seconds, later the ncy will be changed softly from 37.5 Hz to 50 Hz h 10 seconds, after that the frequency will be stable seconds, next the frequency will slow down softly Hz

30、 through 10 seconds, after that the frequency will ble for 20 seconds, then the frequency will slow softly from 25 Hz to 0 Hz through 10 seconds. the fr 25 H stable softly the fr freque throug for 15 to 25 be sta down

31、speed of the water pumping system are shown in Figure 6 and figure 7. Figure 6. Flow rate vs. time. Figure 7. Pump speed vs. time. Frequency inverter, according to the different incoming in h analog unit, operates the

32、 threean wb h 1.erter to state the required a ure 7 thfu m in vre3. Mathematical Model of the System The mathematical model of water pumping system with PLCMFigure 5. Input frequency vs. time According to the control l

33、aw, shown in Figure 5, the experimental output flow rate and experimental pump structions of PLC throug -phase motor with the required percentage of voltage d frequency. Parameter unit is a type of programmer hich is us

34、ed to program the ramp up and ramp down time etween each two controlled levels. So, frequency inverter as two types of commands: Type of commands supplied by the PLC to the analog unit then to the frequency inv level

35、 of flow rate and the hold time interval. 2. Type of commands supplied by parameter unit to ontrol the ramp up and ramp down time to cmake soft transition conditions between various operating levels. It can be not

36、iced from the curves in Figure 6 and Fig at the experimented system shows the capability for ll control of flow rate and pump speed from zero to aximum for any required range of time in case of creasing or decreasing t

37、he flow rate and pump speed. All ariables of the system will be changed gradually until aching their needed working points [14, 15]. and frequency control will be done by using ATLAB-SIMULINK graphical interface Figure