外文翻譯-----恒壓供水的控制與節(jié)能的探索(文件)
【正文】 f, such as owe keep , excessive pressure , is it flow to pass, electric current amplitude limiting is it make exactly to choose, overload, overheated lacking looking , shorting out and disconnected ink protect the function But must prevent trouble before it happens . Through using finding , two kinds of brands of Mitsubishi , Fuji, because has fully considered various kinds of abominable running environment in design and manufacture. The dependability and service life under the same condition are higher than some brands. One small city of mountain area of west place in Hubei in Hubei, average 1200m above sea level, the humidity on the high side of longterm most of the time (about 80%), the sulfur dioxide is seriously polluted, a set of frequency conversion that one factory produces supplies water of the equipment, because has not considered abovementioned factors , less than one year, the relevant parts of the equipment are corroded seriously. And the like product which we designed , installed 4 in the same area, because has fully considered the situations of different difference, on the selecting types of the equipment and ponent , have adopted the ship standard. Through the use of more than two years , ran well , stood the tests of different sternness. Find in using actually , the frequency converter itself is that a strong interference takes place in the source , will often influence the normal running of the equipment. Especially when the low rotational speed of the water pump operates, the frequency shown on the frequency converter does not correspond to actual operation frequency. Generally there are two kinds of spread ways to interfere: The circuit bunch is disturbed and space radiation is interfered. Can take the corresponding measure to solve according to the actual conditions of the scene. For example is it strain wave and absorb the return circuit to increase to programmable power end of controller, PID regulator introduction of unit output sure to have reliable shielding , link frequency converter , ground terminal of electrical machinery with earth stake firmly, control the line and motive force line leave certain distance , in order to strengthen and resist the electromagic ability to interfere. Only in this way ,can make system keep the long and steady working state in high temperature , humidity , mould , strong harsh terms of interfering etc.. Conclusions Are by way of adjusting the speed as the central water supply in frequency conversion, the result is obvious to economize on water , economize on electricity, can be extensively suitable for 2010000 residents the biotope , skyscraper , hotels and retaurants , fire control or district pressurize and supply water, it is ideal facilities that the medium and small scale waterworks supplied water too. Its amount of water quality supported is high, the economic benefits are obvious, the social benefit is enormous, with the development of national economy and constant improvement of the living standards of the people, it is sure to be used and popularized progressively in our country List of references Zhang Wanzhong, Zhu Jie, Wang Mingquan. A kind of newtype frequency conversion constant pressure supplies water of the plan of design of the pump station. Electrical age, 1999 (10): 22232 Liu YingChun. Principle design of the sensor and application. Beijing: Univ
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