变频器设计使用参考外文翻译
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变频器设计使用参考外文翻译
河南理工大学万方科技学院
电气与自动化工程系2012届毕业生
英文文献
专业:电气工程及其自动化
班级:08电气6班
学号:0828100023 ________
姓名:叶国印____________
时间:2012年5月31日
外文资料与中文翻译
外文资料: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 deep-water 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 high-speed motor drive inverter, because of the high-speed motor, antl・small, high harmonics lead to increased output current value increases. So for high-speed 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 of the installation environment Converter
Operating temperature: high-power converter is the internal electronic components, vulnerable to the effects of temperature^ product general requirements for 0-55 C, but in order to ensure the safe, reliable, the use of room to be taken into account, the best control in 40 "C below. In the control box, the converter box should generally be installed in the upper and strictly comply with the Manual of installation requirements, absolutely not be allowed to heating elements or components easily fever close to the converter installed at the bottom.
Ambient temperature: the temperature is too high and large temperature