外文翻译-恒压供水变频器

Constant pressure water supply frequency changerThe transistor frequency changer not only overcame has formerly exchanged velocity modulation many shortcomings, moreover the velocity modulation performance might compare favorably with the direct current motor velocity modulation performance. The three-phase asynchronous motor has the service to be convenient, merit and so on price small advantage, power and rotational speed adapt breadth, its frequency conversion velocity modulation technology in the miniaturization, the low cost and the redundant reliable aspect holds the obvious superiority. To the end of the 80's, the alternating current machine frequency conversion velocity modulation technology rapidly develops into a mature technology, it will supply the alternating current machine the labor frequency alternating current supply to turn direct current after the diode rectification, again by component and so on IGBT or GTR module counter will turn the alternating current supply which the frequency might move, will drive the electrical machinery by this power source to move under the speed change condition, and automatic suitable strain load condition. After it changed in the traditional industry the electrical machinery to start only can by the rated power, decide the rotational speed the sole movement way, thus achieved the energy conservation goal. The modern frequency conversion velocity modulation technology applies in the electric power water pump water supply system.Because the frequency conversion velocity modulation has the velocity modula -tion the physical characteristics well, efficiency high, velocity modulation scope -wide, precision high, adjusting character curve smooth, may continual realize, the steady velocity modulation, the volume small, the maintenance simple is conven -ient, the automated level higher a series of prominent merits but time people's favor. When it applies especially in the air blower, the water pump and so on the large capacity load, may obtain the energy conservation effect which other velocity modulation ways is unable to compare. The frequency conversion velocity modulation system main equipment is provides the frequency conversion power source the frequency changer, the frequency changer may divide into exchange - direct current - to exchange the frequency changer and the exchange - exchanges the frequency changer two big kinds, at present domestic mostly uses hands over - is straight - hands over the frequency changer.Has been published since the general frequency changer, the frequency conversion velocity modulation technology obtained the widespread application in each domain. The frequency conversion modulates velocity the permanent water level feed water equipment by its energy conservation, security, high quality merit and so on water supply quality, caused our country to supply water the profession technical equip level to start from the beginning of the 90's to experience a leap. The constant pressure, the permanent water level water supply velocity modula -tion system realization water pump electrical machinery step less speed regulation, rests on with the water level change regulator system movement parameter, in the water consumption change regulator system movement parameter, changes when the water consumption maintains the hydraulic pressure to be constant and the water level constantly by satisfies the water used request, is now most advanced, the reasonable energy conservation water supply system. Obtained the very big development in the practical application. Along with the electric power electronic technology rapid development, the frequency changer function more and more is also strong. Fully uses each kind of function which in the frequency changer sets, to the reasonable design frequency conversion velocity modulation constant pressure feed water equipment, reduces the cost, guaranteed aspect and so on product quality has the extremely vital significance.In the short several years, the frequency conversion velocity modulation constant pressure water supply system experienced the developing process which consummated gradually, the early time has pumped the velocity modulation constant pressure system to pump only the velocity modulation system to replace gradually. Although only pumps the velocity modulation system design simple reliable, but because only pumps the electrical machinery depth velocity modulation to create the water pump, the electrical machinery operating efficiency lowly, but pumps the velocity modulation system investment more to save, the operating efficiency is high, by the actual proof is the most superior system design, very quickly develops into the leading product. The Semen’s frequency changer design level compares with various brands frequencychanger, the function is formidable, impeccable! If again can from the design consider will service convenient to the future, The nature and enhanced the components in the manufacture selection the quality is most ideal.The Semen’s frequency changer rectification unit pressure resistance is 1200V. If can use pressure resistance 1600V the rectification unit, I thought can enhance the stability greatly and reduce the failure rate.Guards against the disturbance the measure to wait for strengthens, Semen’s frequency changer sometimes can but control because of the disturbance question the host the board or I/The O port burnt.The constant pressure water supply series frequency conversion voltmeters is for the air blower, pumps kind, current capacity and the special-purpose frequency conversion voltmeters the pressure control characteristic specially and so on air compressor which but develops. This aircraft type has the general frequency changer the basic function.This product design had mainly considered the energy conservation and the automated request, in sets at the automatic energy conservation, PID, simple PLC and function and so on RS485 communication connection, may facilitate and PLC, the computer or the main line carries on the communication, the convenient customer operation and the monitoring, at the same time this company also specially developed one kind to process the constant pressure water supply specially the control panel, might conveniently be used together with the far biography pressure gauge.First, frequency conversion constant pressure water supply characteristic:1st, the frequency conversion constant pressure for the hydro-energy automatic 24 hour maintenances constant pressure, and automatically starts the relay pump according to the pressure signal, the step less -adjustment pressure, the water supply quality is good, compares with the traditional water supply, cannot create the pipe network to burst and the water cock resonance effect.2nd, the start is smooth, reduces the electrical machinery water pump the impact, lengthened the electrical machinery and the water pump service life, has avoided in the traditional water supply impingement phenomenon.3rd, uses the frequency conversion constant pressure water supply protection function completely, the movement is reliable, has owes presses, haspressed, has flowed, protection function and so on the heat.5th, may according to the user need, choose each kind of attachment function, for example: The electrical machinery fixed time takes turns, function and so on dormancy.Second, principle of work:The frequency conversion constant pressure water supply system uses a potentiometer hypothesis pressure (also to be possible to use kneading board interior hypothesis pressure), uses a pressure transmitter (feedback is 4-20mA) examines in the pipe network the pressure, the pressure transmitter sends in the signal the frequency changer PID return route, after PID return route processing, sends out a water volume to increase or the reduced signal, controls the motor rotational speed. Like in certain delay time, pressure insufficiency or oversized, then does work the frequency through PLC/The frequency conversion cut, causes the actual pipe network pressure to be consistent with the hypothesis pressure.Moreover, along with the water consumption reduction, the frequency changer automatic reduction output frequency, has achieved the energy conservation goal. Third, applicable scope:Uses the frequency conversion constant pressure water supply, has the highly effective energy conservation, the pressure stable, movement reliable, operation simple, installment convenient, occupying a land area of few, the noise is low, does not have the pollution, invests lowly, benefit higher merit. Is suitable specially for:1. Place the and so on guesthouse, office, apartment, inhabitant plot life gives the heat of hydration water heating system.2. The high-rise construction, the large-scale civil construction fire prevention gives the aqueous system.3. Industry and mining production enterprise.4. Each kind of running water factory.恒压供水变频器晶体管变频器不但克服了以往交流调速的许多缺点，而且调速性能可以和直流电动机的调速性能相媲美。