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Maszyny Elektryczne : zeszyty problemowe

Tytuł artykułu

Dwubiegowa praca napędów wentylatorowych z wykorzystaniem przemiennika częstotliwości o uproszczonej budowie

Autorzy Azarewicz, S.  Zalas, A. 
Treść / Zawartość
Warianty tytułu
EN Two-speed operation of fan drives achieved through frequency converter
Konferencja Efektywność energetyczna napędów z silnikami elektrycznymi: [2 Międzynarodowe Forum] [2003; Spała, Polska]
Języki publikacji PL
EN A design of a mine fan whose supply system includes a frequency converter operating at a constant frequency of 16.6 Hz and the results of tests carried out on the fan are presented. The frequency converter is supplied from a separating transformer and it is used during mining downtimes or in periods of lower demand for air in the ventilated area. Owing to its characteristic the fan offers considerable savings in electricity. An inexpensive, simple but robust frequency converter can be used to provide the required low frequency. This solution can be used in all cases where no continuous control of capacity is needed and where the use of a conventional frequency converter would be inadvisable for economic and technical reasons. In an alternative solution, a two-speed motor with a variable speed difference (e.g. 3 : 1) is used. But this solution is inferior since a two-(or more) speed motor is needed to adjust the low speed to the individual requirements of the quite complex speed switching system and the drive's efficiency and power factor cos phi without individual compensation are rather low. The employed compensating capacitors may cause resonances in the mains, the more so that static converters are more and more widely used. The performance of the fan's drive when a two-speed motor with a fractional speed ratio is used and that of the drive with an additional inverter supplying a conventional motor and a motor with a winding consisting of two parallel conductors are compared. The proposed solution is shown to be both economically and technically viable, introduces little interference into the mains and the motor, can be used in the drives of pumps and fans operating in different industries and the investment quickly pays off.
Słowa kluczowe
PL napęd wentylatora   wentylatory   przemienniki częstotliwości  
Wydawca Instytut Napędów i Maszyn Elektrycznych KOMEL
Czasopismo Maszyny Elektryczne : zeszyty problemowe
Rocznik 2003
Tom Nr 67
Strony 43--46
Opis fizyczny Bibliogr. 3 poz., tab., rys.
autor Azarewicz, S.
autor Zalas, A.
  • Instytut Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej
Kolekcja BazTech
Identyfikator YADDA bwmeta1.element.baztech-article-BPS2-0026-0040