INVESTIGATION OF ASYNCHRONOUS ELECTRIC POWER FREQUENCY CONTROL FAN BUS
Journal Title: Енергетика і автоматика - Year 2018, Vol 0, Issue 6
Abstract
About 60 % of the cost of electricity in the industry accounted for electric motors. At the same time, a significant part of these costs falls on the drive systems of fans, compressors, pumps and other installations with a cyclic mode of operation. Effective reduction of the used power while reducing the performance of the unit is possible only when the speed of the electric motor decreases. This means that a variable frequency drive is used to operate the fan or pump with maximum efficiency. The efficiency at the same time increases by 15 ... 20%. But such a drive requires large capital expenditures, which do not always pay off by reducing energy costs, especially for low power drives. The aim of the work is to determine the efficiency of using low-power adjustable asynchronous electric drive of a ventilation unit. The performance analysis of a controlled electric drive with the selected control method was carried out using the electric drive theory and statistical methods of processing the results of research in a laboratory setting. For the performance analysis, a laboratory installation of an adjustable electric drive axial fan VO-7,1M with the AIRP80-A6U2 engine was created. The motor has an increased resistance to the rotor winding, which causes an increased slip at the rated torque, increased starting torque and a small starting current ratio. The power of the motor was carried out from the frequency converter Mitsubishi FR-E540-1,5K-EC. The experiment was carried out three times. For further analysis, the average value of the results was recorded, which were provided in the form of graphic material. The regulation characteristic n = f (f1) is linear. The adjustment range is D = 9: 1. A drive with such a characteristic should be used for drives that require high precision speed control, for example, dispensers, actuators, etc. Energy savings due to increased efficiency due to the low power of the electric drive is insignificant, and capital costs are much higher compared to an adjustable electric drive based on a thyristor voltage regulator or a pulse-width controlled regulator.
Authors and Affiliations
І. М. Голодний, О. Ю. Синявський, О. В. САНЧЕНКО
Keywords
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