变频器-PLC在供水控制系统的应用中英文对照翻译全文

1、Transducer in the water control system applicationsCurrently, the water level control in a large part of the electrical pumps are not towing gear shift system, no gear shift most of the electrical energy consumed in the water supply to the frequent changes in the pumps stopped. This not only makes t

2、he electrical work in inefficient zones, cut short the useful life of electrical and electrical equipment for the frequent failure to stop the high rate, leading to serious waste of water resources, system maintenance, repairs larger workload. With high living water and industrial water gradually in

3、creased, the traditional control methods that are outdated. Originally used for artificial water level control, water level due to the lack of accurate positioning hour monitoring, it is difficult to accurately control the pumps have stopped; Using buoys or mechanical control devices such as water s

4、upply situation has made some changes, but because of mechanical failure more devices, poor reliability to maintenance will face great trouble. Frequency conversion technology, with its superiority in the area of energy efficiency and Hengya pressure control system can be solved by the existence of

5、the above problems. Consider selecting Chanpianji or Plc and transducer combination at the core of the system can achieve a better control results. But in software design, Plc programming of more than Shanpianji concise, and visual; From the hardware interface considerations, Shanpianji circuit slig

6、htly complex; From the economic considerations, the Plc processes are mature, cost and small Plc Shanpianji a little, because the system parameters to be adjusted in accordance with the situation on the ground, Plc software, the time parameters adjustments simpler, so more conducive to after-sale pe

7、rsonnel. For the above reasons, the selection of the Omron Plc CPM1 series with the transducer as ABB control core, coupled with PSW7 conditioners and WSP300 Biansongqi pressure, the effect was very good control, software design simple hardware interface simple and feasible, reliable, the entire sys

8、tem Xingjiebi very high.Transducer in the water system in conjunction with the introduction of small Plc technology not only change the traditional use of water control valves, and in energy conservation, Hengya control, are very good results, the paper introduced a transducer -PLC control technolog

9、y in the pump control applications.Control system using one Taiwan transducer can bring three pumps, pumps can work at the frequency pump in the conventional model can work in the frequency conversion pump model. At the pump only in frequency conversion or one of the working frequency mode through t

10、wo relays efficient ensure its security and reliability. System structure as figure 1 shows, the use of placement in the life of water pressure Biansongqi water pressure signal transmission to the regulator, in accordance with the regulator to set the value and warning of lower compared to send sign

11、als to the Plc and the transducer, the system has stopped pumping from regulator pressure level signals and transducer frequency range signal, if the low pressure, regulator to the Plc a pressure lower signal Plc activation transducer, and a frequency conversion 1st pumps work state, and the output

12、frequency gradually increasing, after a period of adjustment, such as pressure is low, then, Plc for 1st pumps in the frequency of work, 2nd pump frequency conversion work at the state pumps, such as pressure is low, 2 pumps at the frequency for the state and make the state 3rd pumps in frequency co

13、nversion work, and so on. When the pressure regulator to limit the police on duty, regulator output reduction, transducer frequency reduced to the low frequency range set value at a given frequency transducer signals to the lower PLC,PLC According to Kai principle pause control pump operation sequen

14、ce, for example, Plc received lower frequency signals, the system pumps state is the frequency 1st, 2nd-frequency, 3rd frequency conversion, the first time 1st pumps activated, the first stop, then as the pressure was high, then stopped on the 2nd pumps. Each system is used for slow start, high-spee

15、d operation in order to enhance operational efficiency. Introduces the frequency changer union small PLC technology in the water supply system, not only change tradition with valve control water volume how many, moreover in aspects and so on energy conservation, constant pressure control had the ext

16、remely good effect, this article introduced the frequency changer-PLC regulation technology in water pump control application.The control system may bring three water pumps with a frequency changer, each water pump already may work in the conventional power frequency pump pattern, also may work in t

17、he frequency conversion pump pattern. Each pump only can be in the frequency conversion or the power frequency one kind of working pattern, guarantees its safety and the unreliability mutually through two relay locks. System structure as shown in Figure one, the use places in the domestic water pres

18、sure transmitting instrument the water pressure signaling regulator, and reports to the police the bound according to and the regulator setting value to compare, delivers a letter the number for PLC and the frequency changer, the system stops the pump separately decided by the regulator low pressure

19、 limit signal and the frequency changer lower frequency limit signal, if the pressure is low, the regulator for a PLC low pressure limit signal, the PLC start frequency changer, and causes the first pump to be at the frequency conversion active status, the output frequency increases gradually, passe

20、s through a period of time adjustment, if the pressure is also low, by now, PLC let the first pump be at the power frequency conditionThe work, causes the second pump to be at the frequency conversion active status pump, if the pressure is also low, then lets the second pump be at the power frequenc

21、y condition work, causes the third pump to be at the frequency conversion active status, so analogizes. When the pressure achieved when the regulator upper limit reported to the police the value, the regulator outputs reduces, the frequency changer frequency reduces, lowers to the lower frequency li

22、mit setting value, by now the frequency changer gave a lower frequency limit signal the principle which opened first for the PLC, PLC basis stops first to control the pump the movement order, when for example, PLC received the lower frequency limit signal, in the system the pump condition was a powe

23、r frequency, two power frequencies, three frequency conversion, the first pump first started by now, therefore stopped first, like the pressure also was then high then stopped the second pump. The system used all has each time carried on the low speed to start, the high speed movement enhanced the o

24、perating efficiency.Uses the frequency changer - PLC constant pressure water supply installment to have following several merits:A:The electricity saving benefit is high. The traditional water pump electrical machinery uses the large capacity electrical machinery, is constant with the valve control

25、water volume, creates the electrical energy waste.Frequency conversion system, regardless of the operational parameter how, the electrical machinery efficiency cant reduce, the electrical machinery power factor can obtain the enhancement.B:Moves is reliable, is stable. In the system core part - freq

26、uency conversion velometer itself reliability is very high, in the ordinary circumstances may the long-term usage 100,000/Above h. The system also selects the soft start method, does not have the electrical impact, does not pollute the electrical network, moreover frequency changer bringing owes pre

27、sses, the pressure, the overflow, the overload, superheat as well as loses speed and so on each kind of protection function. The system adopts damping filter processing to the pipe network fluctuation of pressure, the water supply constant pressure precision is high, usually can control in the 0.002

28、Mpa scope.C:The structure is simple, the operation is simple. The installment control system uses the integration rate to be high, necessary plan nimble diverse, obtains water pump movement each kind of combination by the programmable controller. The velocity modulation scope is broad, to water volu

29、me change adaptiveness.D:The service life is long, the automaticity is high, does not need the human to safeguard, maintains the quantity to be few.Above system the effect is remarkable in the actual application, if brings in PLC and the frequency changer the programmer the function integration, pot

30、ential becomes some special-purpose frequency changers, such system reliability and the toughness big enhancement, the application is simpler, the system total cost also can drop.May foresee: The future frequency conversion technology will be able to develop to the below direction:(1 high performanc

31、eThus including internal leveling circuit, the contravariant electric circuit all use the high frequency PWM electric circuit to cause the input, the output all are sine waves; Uses the multi-densification regarding the large capacity frequency changer and many machine is parallel; Reduces frequency

32、 changer own loss, the realization high efficiency; Realizes autotune or from the optimization, the remote control and controls far; Even more faces the user, further enhances the workability and Maintainability: Turns towards, the featherweight development small, as well as reduces the cost and so

33、on.(2 intellectualizationIncluding two aspects: Reduces the hardware as far as possible, realizes the hardware software; Uses the intelligent electric power electronic device and other intellectualized part. The integration is the intellectualized foundation.(3 entire digitizationIn recent years, ea

34、ch kind of modern control theory, the expert system, the fuzzy control and the neuron control and so on all were the development hot spots, will cause the electric power electronic control technological development to a brand-new stage. Estimated the 21st century entire numerical control the applica

35、tion will be more widespread thoroughly, even will substitute for the simulation control.(4 systematizationFrequency conversion technology development is inseparable from the development of related technologies, frequency conversion technology development in the 21st century is to grid, regulators,

36、rely machine, electric motors, production machinery and control systems as a whole, from the system for consideration.变频器在供水控制系统的应用目前，在水位控制中有很大一部分水泵电机是不变速拖动系统，不变速电机的电能大多消耗在适应供水量的变化而频繁的开停水泵中。这样不但使电机工作在低效区、减短电机的使用寿命，而且电机的频繁开停使设备故障率很高，导致水资源严重浪费，系统的维护、维修工作量较大。 随着高位生活用水和工业用水逐渐增多，传统的控制方法已经落后。原先用人工进行水位控制，由

37、于无法每时每刻对水位进行准确的定位监测，很难准确控制水泵的起停；使用浮标或机械等水位控制装置使供水状况有了一些改变，但由于机械装置的故障多，可靠性差，给维修带来很大的麻烦。 变频技术以其在节能与恒压方面的优越性能可以解决水压控制系统存在的以上问题。考虑选用单片机或PLC与变频器结合为核心构成的系统都能达到较好的控制效果。但在软件设计上，PLC比单片机的编程更简洁、直观；从硬件接口考虑，单片机电路稍微复杂一些；从经济方面考虑，由于PLC工艺的日渐成熟，小型PLC的成本与单片机相差无几，由于要根据现场情况调整系统参数，PLC的软件中时间参数的调整更简单，这样更有利于售后服务人员掌握。基于以上原因，选用了OMRON的 CPM1系列PLC与ABB的变频器作为控制核心，再加上PSW7调节器与WSP300压力变送器，控制效果非常好，软件设计简单，硬件接口简易可行、可靠性高，整个系统的性价比非常高。 在供水系统中引进变频器结合小型PLC技术，不仅改变传统用阀门控制水量多少，而且在节能、恒压控制等方面均有非常好的效果，本文介绍了变频器-PLC调控技术在水泵控制中的应用。控制系统用一台变频器可以带三台水泵，每台水泵既可以工作在常规工频泵模式，也可以工作在变频泵模式。每台泵只能处于变频或工频其中一种工作模式，通过两个继电器互锁保证它的安全与可靠。系