ABB AO895 厦门莫格电气自动化有限公司 联系人:雷琳 电话:/0592-6808394,Q 1.PLC是建立在单片机之上的产品,单片机是一种集成电路,两者不具有可比性。 2.单片机可以构成各种各样的应用系统,从微型、小型到中型、大型都可,PLC是单片机应用系统的一个特例。 3.不同厂家的PLC有相同的工作原理,类似的功能和指标,有一定的互换性,质量有保证,编程软件正朝标准化方向迈进。这正是PLC获得广泛应用的基础。而单片机应用系统则是八仙过海,各显神通,功能千差万别,质量参差不齐,学习、使用和维护都很困难。 最后,从工程的角度,谈谈PLC与单片机系统的选用; 1.对单项工程或重复数较少的项目,采用PLC方案是明智、快捷的途径,成功率高,可*性好,手尾少,但成本较高。 2.对于量大的配套项目,采用单片机系统具有成本低、效益高的优点,但这要有相当的研发力量和行业经验才能使系统稳定、可*地运行。较好的方法是单片机系统嵌入PLC的功能,这样可大大简化单片机系统的研制时间,性能得到**,效益也就有保证。 引言 PID控制作为一种经典控制算法,具有结构简单、易于调试、动态响应特性快、鲁棒性强等特点。但是,对于中、低频周期信号,该算法仍无法实现无静差控制;对由非线性负载引起的输出波形畸变的调节能力也较差。 本文介绍了一种PID控制器与重复控制器采用串联拓扑结构的方案,将稳定的PID+控制对象闭环系统作为重复控制器的控制对象,在保证系统稳态误差和动态性能的同时,简化了重复控制器的设计。 1 逆变器模型 式中,u0为输出电压;i 为电感电流; 为负载电阻;C为滤波器电容;£为电容等效串联电阻: 取采样频率和开关频率相等,把逆变桥看作一个零阶保持器,将式(2)离散化可得对象的脉冲传递函数为: 2 PID控制器设计 图2所示为PID控制系统的开环频率特性图(Bode图)。其中,G0为被控对象;G 为PID控制器;G=Gp×G0 按照传统PID设计理论,首先设开环系数为K=200,目的是提高系统低频增益,减小稳态误差。但是K值过大会降低系统稳定性,所以在低频段 处加一零点,与积分环节构成滞后校正。该滞后环节的作用主要有两条:一是在保证系统暂态性能基本不变的情况下,提高系统低频响应的增益,减小系统的稳态误差;二是利用其低通滤波特性衰减系统高频响应增益,提高系统的相角裕度,以改善系统的稳定性。 Fuji FRN7.5G11S-4JE Fuji FRENIC 5000 G11 FRN3.7G11S-4JE Fuji FVR E9S FVR0.4E9S-7JE Fuji FVR E9S FVR0.4E9S-4JE Fuji FVR E9S FVR0.75 E9S-4JE Fuji FVR E11S FVR0.75 E11S-4JE Fuji FVR E11S FVR3.7 E11S-4JE Fuji FVR E9S FVR2.2 E9S-4JE Fuji FVR E9S FVR3.7 E9S-4JE Fuji FVR008 E7S-4EX Fuji FVR008 E7S-7EX Fuji FVR008 G7S-4EX Fuji FVR008 G5S7 Fuji FVR008 G5S7Z Fuji FVR 0.75C9S-7JE Fuji FVR 037G5S-4 Fuji FRENIC FRN2.2E1E-4A 4.1kVA three phase drive Fuji FRENIC FRN2.2E1E-4A 4.1kVA three phase drive NIB Fuji FRENIC FRN7.5E1S-4A 14 kVA three phase drive NIB 7.5KW VSD Fuji FRENIC FRN0.75E1E-4A 1.9 kVA three phase drive NIB ABB A9-30-10 ABB A12-30-10 Precision vernier speed control and display box set suit conveyor Ter*i TemBreak Circuit Breaker XS30NS reversing contactors Motor Overload Oriental motor SS21L SSSD Motor speed control pack 100V AC Oriental Motor VEXTA UDX 5114-G9 Roll of Tyco Pyrotenax mineral insulated Cable 2 core + Copper clading Powertron solid state motor controller fisher industries SSS-3P 63A model 2513 i Sassi S.p.A Takedo 2 Type 50 50A DC Drive Siemens Simovert Transistor Pulse-inverter Drive D415 Akribis DGL Double Guide Linear Motor Stage DGL200-S2-400-0?.1-CR CNC robot 5 x Allen Bradley 140M C2E Motor protection M05-10E contactor combo busbar PCA Absolute Shaft Encoder ANSL 12BS MBAM/01024 Huge AEG puck type thyristor SCR T930S2000TMC 60322929 Emotron Soft Starter MSF 030. Enclosure IP20 30A 37A Mitsubishi Freqrol VSD inverter drive FR-Z024-0.4K-UL 0.4KW Sprecher + Schuh KTA7 25S 1A 0.63 to 1A Motor Protection Contactor Combo Multipin cable loom wiring suit Reliance automax PLC 612411- 612410- 612408- 60R Elettronica Santerno ZZ0103003. 74003 Sinus Penta 0011 4T BA2K5 7.5KW VS Drive New 3KW Emmerson variable speed drive VSD BA1504-E12 E54 Elletronica Santerno 22kw VSD ZZ0103010. 74003 Sinus Penta 0030 4T BA2K5 22Kw Elletronica Santerno 18.5Kw ZZ0103069. 34003 Sinus Penta 0025 4TBA2K5 VSD 18.5KW QTY of 7 6A 500V fuses ABB NH-C007999(x6) GEC IEC 269-2-1(x1) Siemens 63A Fuse 383883 603412351 QTY of 3 Siemens 60341247 383879 68 OHM, M/MTR wire wound resistor set of 3 600 VAC Fuses (10 of Littelfuse L601 / 3 of TRON KBC-1) QTY of 13 PDL UDi-90 90A 45KW variable speed inverter drive VSD AC motor speed control Fuji FRENIC FRN3.7E1E-4A 6.8kVA three phase drive New Fuji FRENIC FRN3.7E1E-4A 6.8kVA three phase drive NIB Penta-Drive DC Motor Speed Control NEMA-4X / IP-65 KBPC-240D 115/230 VAC Mitsubishi FREQROL A500 FR-A540-0.4 variable speed driv Allen Bradley 22B-D6P0N104 with 22-RF012-BL 2.2kW/3.0HP drive 3 phase 380-480 V 24V DC Power Supply 240V Input 50VA PDL Electronics Micro Drive Elite ME-10.5 Variable Speed Drive 13 A 380-480V PDL Electronics Micro Drive Elite ME-10.5 (IP54)C VS Drive 3 ph 230-480V 13A Ward Leonard 180A 600V DC Motor Contactor with reliance part 78093-9R Ward Leonard 30A 600V DC Motor Contactor with reliance part 78090-9R NEW 630KW variable speed drive Telemecanique ATV68 C63 N4 Schneider VSD Fuji FVR004 E7S-4EX 1.1kVA three phase variable speed drive Geoff Merrill electronics 240VAC input 24V 10amp power supply *-Eurodrive .75 kw 1 hp 3 phase motor & gear box with inverter Drive & brake machine motor control module status indicator meter panel Telemecanique LA1 DN226 25A contactor 1100917-0244 110V AC coil KB ELECTRONICS 115/230VAC 50/60 HZ REGENERATIVE DC MOTOR CONTROL drive KBMG-212D KB ELECTRONICS 115/230VAC 50/60 HZ REGENERATIVE DC MOTOR CONTROL KBMG-212D Box BOX AND CONNECTORS suit REGENERATIVE DC MOTOR CONTROL KBMG-212D NIB 2 Allen Bradley 20A C 011 A 0AYNANNN 5.5kW 7.5HP three phase variable speed drive Allen Bradley 20B C 2P1 A 0AYNANCO 0.75kW 1HP three phase variable speed drive Allen Bradley 20B C 3P5 A 0AYNANAO 1.5kW 2HP three phase variable speed drive Allen Bradley 20B C 011 A 0AYNANCO 5.5kW 7.5HP three phase variable speed drive Emotron 11kw Variable Speed Drive. FDU40-026-54CE. Including Manual. Encl IP54 Zener Variable Speed Drive. Model MSC-3R23. Part No. 3R02336. 22.5A rating Hitachi HFC VWS 5.5 HB2 5.5kVA 7.5HP three phase variable speed drive Emotron Variable Speed Drive FDU40-031-54CE Enclosure IP54 15KW Hitachi HFC VWM 5.5 HB2 5.5kVA 7.5HP three phase variable speed drive Reliance AutoMax 57C493 375W Power Supply module ES371AMB Fanuc Teach Pendant connection point robotic control A20B-1006-0290/?02B