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)(存儲(chǔ)版)
【正文】 cabi at this time of the mechanical strength, vibration and shock away from the source, we must also use seismic rubber pad fixed within and outside the control cabi, such as electromagic switches have a vibration ponents. Equipment operation after a period of time and should conduct inspections and maintenance. Electromagic interference: Inverter at work due to rectification and frequency, produce around a lot of electromagic interference, these highfrequency electromagic waves in the vicinity of the instrument, apparatus, a certain interference. Therefore, the cabi instrumentation and electronic systems, it should be optional metal, shielding the inverter instrument interference. All the ponents should be reliable grounding, in addition, the electrical ponents, equipment and instrumentation should use the connectivity between the shielding control cables, and the shield should be grounded. If handled properly electromagic interference, often cause the entire system does not work, leading to the control unit failure or damage. 2) Drives and determine the distance between the electrical cables and wiring methods Drives and motor the short distance should be as much as possible. This reduces the capacitance of the cable, reducing the emission source of interference. Control cables optional shielded cable, power cable or optional shielding from the cable converter to use all the threads of the electrical shield. Electric cables should be independent of the other cable alignment, the minimum distance of 500 mm. At the same time should avoid the electrical cables and other longrunning cable lines, in order to reduce the output voltage inverter rapid changes in the electromagic interference. If the control cables and power cables cross, as far as possible so that they cross the 90degree angle. Converter and analog signals on the line and back to the main line of separation of alignment, even in the case also in the control cabi. And the analog signal converter line the best choice of unshielded twisted pair, shielded power cables selection of the threecore cable (its specifications than ordinary electrical cables in the files) or to ply with the user manual converter. 3) inverter control schematics Main circuit: the role of reactor is to prevent the highfrequency converter harmonic power through the input circuit to return to the grid by the impact of other electronic devices, in accordance with the capacity size converter to decide whether to increase reactor。 because the converter No builtin the reactor, so the converter input and output level of external power line will have a very strong interference, placing the signal lines of metal or metal hose has to be extended to the inverter control terminal, to ensure that the signal Line and the plete separation of power lines. 1) analog control signal line should use twostrands shielding line, cable specifications for mm2. When the wiring must pay attention to, to the extent possible, the cable Baoxian short (57 mm or so), while Bao Xian after the shield should wrap insulating tape to prevent shielding lines and other equipment contact with the introduction of interference. 2) To improve the simple wiring and reliability, signal remend the use of online video pressure bar. (5) converter and the operation of the relevant parameters set Inverter setting parameters, the parameters of each have a certain range of options, often encountered in the use of individual set of parameters for misconduct, leading converter does not work phenomenon. Control: that is, speed control, transferred from the control, PID control or other means. To take control, accordi
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