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STARTING OF REFRIGERATION COMPRESSORS.

Author(s) : MISTRY S.

Type of article: Article

Summary

TWO METHODS OF STARTING 3-PHASE INDUCTION MOTORS ARE COMPARED. IN THE TRADITIONAL EUROPEAN STAR-DELTA METHOD, THE STARTING CURRENT AND STARTING TORQUE ARE 33 AND 35% OF THEIR FULL LOAD VALUES AND THE RUN UP TO SPEED IS BALANCED AND SMOOTH. IN NORTH AMERICA, A PART-WINDING START IS SOMETIMES USED, IN WHICH ABOUT HALF OF THE WINDINGS ARE ENERGISED A SHORT PERIOD BEFORE THE REST. THE RESULT IS A LARGER STARTING TORQUE, BUT AT UP TO 65% OF FULL CURRENT AND THE RUN UP IS INCLINED TO BE NOISY WITH VIBRATION. AS BOTH METHODS ARE REASONABLY SIMPLE AND NEITHER WILL GIVE SUFFICIENT TORQUE TO START A COMPRESSOR ON FULL GAS PUMPING LOAD, THE AUTHOR RECOMMENDS STAR-DELTA SHOULD ALWAYS BE USED. D.W.H.

Details

  • Original title: STARTING OF REFRIGERATION COMPRESSORS.
  • Record ID : 1983-1295
  • Languages: English
  • Publication date: 1982
  • Source: Source: Refrig. Air Cond. Heat Recov.
    vol. 85; n. 1.015; 1982.10; 46-51 (4 p.); 6 fig.; 1 tabl.

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