變頻器外文文獻(xiàn)翻譯---變頻器設(shè)計(jì)使用參考-其他專業(yè)-展示頁(yè)
2025-01-31 08:13本頁(yè)面
【正文】 ctrical inverter to the longer distance, we should install filters. Although the frequency converter itself has all kinds of protection, but the lack of protection is not perfect, the main circuit breaker played overload, lack the same protection, selection, in accordance with the capacity to choose the frequency converter. Converter itself can be used to replace thermal overload protection relay. Control loop: the frequency with the frequency manually switch to the failure frequency can be manually cutoperation, not because of output voltage, frequency and frequencybe interlocked. 4) Inverter grounding Inverter correct grounding is to improve the system stability, the ability to inhibit an important means of noise. Inverter grounding resistance grounding terminal of the smaller the better, the grounding wire crosssection of not less than 4 mm, the length of not more than 5 m. Inverter should be grounded and power equipment to the sites separately, not in total. The shield signal converter from one end of the grounding end, the other floating air. Inverter and control of electrical between the same counter. (3) Inverter Control Design Converter should be installed in the control cabi internal control counters in the design should pay attention to the following issues 1) heat: Inverter fever is the internal loss. In the frequency converter in the main part of the loss mainly to the main circuit, or about 98 percent, accounting for 2% of control circuits. In order to ensure reliable operation of the normal inverter, Thermal must inverter are usually used for cooling fan。 畢業(yè)論文 (設(shè)計(jì) )外文資料翻譯 姓 名 學(xué) 號(hào) 年 級(jí) 專 業(yè) 系 （院） 指導(dǎo)教師評(píng)語(yǔ)： 簽名： 年 月 日 外文文獻(xiàn)及譯文 Converter reference design (1) Converter Selection: Selection to determine the frequency converter when the following points: 1) The purpose of a variable frequency。 constant pressure to control or constant current control. 2) the load converter types such as leaves or pump volume pumps, with special attention to load the performance curve, the performance curve of the decision of the ways and means. 3) the frequency converter and load matching Voltage match: a rated voltage converter with a rated voltage line with the load. Current matches: ordinary pump, the rated current inverter and motor rated current match. For special load such as deepwater pumps, and so on need to refer to the electrical performance parameters to determine the most current inverter current and Guozainengli. Torque match: in this case constant torque load or slow down when the device may have occurred. 4) the use of highspeed motor drive inverter, because of the highspeed motor, antismall, high harmonics lead to increased output current value increases. So for highspeed motor inverter Selection, its capacity to be slightly larger than the ordinary motor selection. 5) If the frequency converter to a long cable run, this time to take measures to curb the long cable to the impact of capacitive coupling, inadequate efforts to avoid converter, so in this case, the drive to enlarge the capacity of a file or the converter Output installed output reactor. 6) For the application of some special occasions, such as high temperatures, high altitude, at this time would cause the down converter capacity, the drive to enlarge the capacity of a block. (2) inverter control schematic design: 1) First confirmation
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