多泵组变频供水控制器的设计

1、摘要 (PL匪) 澞 澞澞 澞 PL匪w w.91HMI.comwww PLCworld cnMulti-Pump and Frequency of water supply controllerDesignAbstractThis paper introduces a constant pressure water supple system. It can regulate aut-omatically the quantity and rotational speed of the water pump with the variation of the load. The contro

2、lling principle and the hardware circuit are presented in detail.The basic control strategy of the control system of constant pressure of water supply is: install the control system with motor speed adjustment and programmable logic controller (PLC), it carries out optimization control pump organiza

3、tion of the operation of speed adjustment, and adjusts the number of running pumps, completes pressure of water supply closed-loop control system, reaches the steady pressure of water supply in the changing of rate of flow in the pipe net and the purpose of economizing electrical energy. The control

4、 goal of system is the effluent pressure ofpump station. The system's advantage is that starting steadily, the starting current mayw w.91HMI.comberestricted within specified currenwtw, wsPoLCwaovrlod cinded the impact of electrical networkwhen it starts; because the average rotational speed of p

5、ump is reduced, may prolong the using of pump and valve etc.; may eliminate water hammer effect when starts andstops machines.Key words:Inverter, Constant pressure water supply system , PLC1目录11.1 11.2 11.3 11.4 232.1 澝32.2 32.2.1 SVPWM42.2.2 VC42.2.3 DTC42.2.4 52.3 52.4 6.w.w.w.P.L.C.w.o.r.l.d.c.n

6、63.1 63.2 73.3 PLC 83.3.1 EM235 103.3.2 EM235 113.3.3 EM235 1112ww.91HMI.com34 PLC 124.1 PLC 124.2 PLC 124.3 134.4 145 错误！未定义书签。1516 1 17 2 2321 绪论1.1 引言澞 澞 澞1.2 变频调速恒压供水的目的和意义澞 澞 w.91HMI.comwwwPLCworld cn 澞 澞 澞澞 澞厕 澞 澝澝澝澝澞1.3 变频调速技术的特点及应用 澞 澞 PID w3澞 NKL-A 澞1.4 可编程序器的应用PLC 澝澝澝澝澝 澝澝澝澝 澞1澝 PLC 澝澞澝澝澝澝

7、澝 澝斂 澞2澝澝澝 澞Analog Digital A/D D/A 澞PLC A/Dw.91HMI.com D/A wwwPLCworld cn 澞3PLC 澞 I/O 澞 澞PLC 澝澝澝澞4澝澝 澞 PLC 澞PID 澞 PLC PID PLC 澞PID PID 澞澝澝澝敒澞5 PLC 澝澝澝澝 澝澝澝澝澞 澞w4澝澝 澞6PLC PLC PLC 澞 PLC PLC 傱傱澞 PLC 澞2 可编程变频恒压供水2.1 变频器的节能、调速原理系统的设计(50Hz 60Hz) 澞 CPU 澞澞澝wwwPLCworld澝cn ww.91HMI.com澝澞 澞澝 80 80 51 50 13 30-

8、4015澞2.2 变频器方式的选择 380650V 0.75400kW 0400Hz澞澞2.1U/f=C SPWM澝 澞5澞 澝澝澞澞2.2.1 电压空间矢量（SVPWM）方式澞 澝 澞 澞2.2.2 矢量（VC）方式 Ia澝 Ib澝Ic澝 Ia1Ib1 Im1澝It1 w.91HMI.comIm1 wwwPLICt1world cn 澞 澞凥澞 澞澞w2.2.3 直接转矩（DTC）方式 DePenbrock 1985 澞澝梁澞澝 澞 澞 凥澞62.2.4 矩阵式交交方式VVVF 澝澝澞 澞 澞澝澞 l澞澞 澝澞 <2ms±2 PG <3 0 15020015澞-澞2.3

9、 系统的设计方案:plc ,w.91HMI.comwwwPLCworld cn ,澞 澝澝澝澝澝plc 1 澞w 1 澞澞plc 7 P L CPLC 澞 plc 澞 ,澝 澞2.4 系统的工作原理 1#-4# 澞澞 1# 0Hz PID 50塑z 1联 50塑z 0塑z2联 3联澝4联 1联 2联w.91HMI.com 0 wwwPLCworld c5n 0塑z 2联 50 塑z 0塑z3联 4联澞 PID 澞 1#澞w系统的硬件设计33.1 主电路设计 2 澞 M1澝M2澝M3澝M4澞 KM1澝KM3澝KM5澝KM7 M1澝M2澝M3澝M4 KM2澝KM4澝KM6澝KM8 M1澝M2澝M3

10、澝M4 FR1 澝 FR2澝FR3澝FR4 QS1澝QS2澝QS3澝 QS4澝QS5 FU1 VVVF 澞8N L1 L2L3FU1QS1QS2QS3QS4QS5HUSVTWVVVFKM1KM3KM5KM7KM2KM4KM6KM8FR1FR2FR3FR4M1M2www PLCworld cnM3M4ww.91HMI.com 2 电路的设计 3 澞 SA /SA 2 1 澞 SB1-SB4 / PLC PLC 4 COM COM KA 澞 Q0.0-Q0.7 Q1.0-Q1.5 PLC 澞HL1澝HL3澝HL5澝HL7 M1澝M2澝 M3澝M4 HL2澝HL4澝HL6澝HL8 M1澝M2澝M3澝

11、M4 澞3.29NL11 SAPLC2KM2KM1FR1SB1SB2Q0 0HL1Q0 1KM1 KM2KM1HL2FR2KM4KM3SB3Q0 2SB4HL3Q0 3KM3 KM4KM3HL4 FR3KM6KM5SB5Q0 4SB6HL5Q0 5KM5 KM6KM5HL6FR4KM8KM7SB7SB8Q0 6HL7Q0 7KM7KM8KM7HL8Q1 0HL9Q1 1HL10Q1 2HL11ww.91HMI.comwww PLCworld cnQ1 3HA Q1 4KA 3 3.3 PLC 配置PLC 澞PLC I/O 澞 I/O PLC / PLC I/O 澝澝/澝A/D D/A 澞 PL

12、C 澝澝澝澝澞澝澝 CUP 澞 CUP 澝澝 澝澝澝澞10澝澞 I0.1澝I0.2 0 1澞 1ww.91HMI.co11 SAI0.0SLLI0.1SLHI0.2SUI0.3SB9I0.4SB10I0.5UAIW0m 1#wwwPLCworldcn KM1HL1Q0.01#KM2HL2Q0.12#KM3HL3Q0.22#KM4HL4Q0.33#KM5HL5Q0.43#KM6HL6Q0.54#KM7HL7Q0.64#KM8HL8Q0.7HL9Q1.0HL10Q1.1HL11Q1.2 6 澝 13 1 澝 1 澞 CPU 224 PLC CUO 266 PLC 澞 S7 -200 CUP2228

13、 /6 EM2228 EM2354AI/1AO澞澞S7-200PLC PLC澝 PLC PLC 澞 S7-200CPU22* PLC澞HMI PLC 9澞PLC PLC w.91HMI.com, PLC www PLCworldcn 澞 PLC PLC 澞 / / S7-200 PLC EM235 澞3.3.1 EM235 模拟量工作单元性能指标w 2EM235 /12 30VDC32mA±10-3dB3.1kHzHAQ1.3KAQ1.4UFAQW0ww.91HMI.co1312 A/D 020 mA 12 11 010V05V01V0500mV-3200000100Mv,050mV

14、±10V±5V±2.5V±1V±500mV±250Mv±100mV, ±50mV, ±25mv020mA 055 ±2%±2% 055 25 ±2%±2%±5%±5%mwww PLCworld cnAD 250s1.5 mS 95%4dB,DC 60Hz ±12V24VDC 20.428.8V 100s 2ms -32000 032000澝澞澞澝 EM235 澝澞3.3.2 EM235 的安装使用1 DIP 澞 澞2澞澝 澞澞 24VD

15、C 澝 澞3澞S7-200 0 澞 澞4澞w.91HMI.com AIW AQW www PLCworld cn V 澞 澞 3.3.3 EM235 工作程序编制EM235 1澞楝澞澞2 澞3澞澞45澞S7-200PLC /I/O I/O 澞w144 PLC 的设计4.1 PLC 的编程语言PLC PLC 澞澞PLC 澞澞 PLC 澞 1 0 澞 1澞4.2 PLC 的编程结构功能图wwwPLCworldcn ww.91HMI.com澞 澞 PLC 澞 PLC PLC PLC PLC澞澝 澝澞 澞PLC I/O I/O 澞 PLC PLC I/O 澞 PLC 7澞154.3 梯形图编程语言PLC 澞PLC 澝澝澝澞澝 PLC 澞 PLC 澞澞澝澞CUP 澞 澝澞 澞澞 PLC ww.91HMI.comwww PLCworld cn PLC PLC 澝澝澞澞1 澞PLC 澞 澞PLC澝澞澞澝2PLC PLC 澝澞PLC 澝澝澞澞3PLC 澞澝 澝澝澞416 澞PLC 澞5PLC 澞 CUP 澝澝澝 I/O澝PID PLC 2澞澝澞 PID 澞 90%澞PI澞ww.91HMI.comwww PLCworld cn 31