變頻器-PLC在供水控制系統(tǒng)的應用中英文對照翻譯全文

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3、creased, the traditional control methods that are outdated.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.變頻器在供水控制系統(tǒng)的應用目前，在水位控制中有很大一部分水泵電機是不變速拖動系統(tǒng)，不變速電機的電能大多消耗在適應供水量的變化而頻繁的開停水泵中。這樣不但使電機工作在低效區(qū)、減短電機的使用壽命，而且電機的頻繁開停使設備故障率很高，導致水資源嚴重浪費，系統(tǒng)的維護、維修工作量較大。 隨著高位生活用水和工業(yè)用水逐漸增多，傳統(tǒng)的控制方法已經(jīng)落后。原先用人工進行水位控制，由

37、于無法每時每刻對水位進行準確的定位監(jiān)測，很難準確控制水泵的起停；使用浮標或機械等水位控制裝置使供水狀況有了一些改變，但由于機械裝置的故障多，可靠性差，給維修帶來很大的麻煩。 變頻技術以其在節(jié)能與恒壓方面的優(yōu)越性能可以解決水壓控制系統(tǒng)存在的以上問題?？紤]選用單片機或PLC與變頻器結(jié)合為核心構成的系統(tǒng)都能達到較好的控制效果。但在軟件設計上，PLC比單片機的編程更簡潔、直觀；從硬件接口考慮，單片機電路稍微復雜一些；從經(jīng)濟方面考慮，由于PLC工藝的日漸成熟，小型PLC的成本與單片機相差無幾，由于要根據(jù)現(xiàn)場情況調(diào)整系統(tǒng)參數(shù)，PLC的軟件中時間參數(shù)的調(diào)整更簡單，這樣更有利于售后服務人員掌握?；谝陨显颍x用了OMRON的 CPM1系列PLC與ABB的變頻器作為控制核心，再加上PSW7調(diào)節(jié)器與WSP300壓力變送器，控制效果非常好，軟件設計簡單，硬件接口簡易可行、可靠性高，整個系統(tǒng)的性價比非常高。 在供水系統(tǒng)中引進變頻器結(jié)合小型PLC技術，不僅改變傳統(tǒng)用閥門控制水量多少，而且在節(jié)能、恒壓控制等方面均有非常好的效果，本文介紹了變頻器-PLC調(diào)控技術在水泵控制中的應用?？刂葡到y(tǒng)用一臺變頻器可以帶三臺水泵，每臺水泵既可以工作在常規(guī)工頻泵模式，也可以工作在變頻泵模式。每臺泵只能處于變頻或工頻其中一種工作模式，通過兩個繼電器互鎖保證它的安全與可靠。系