A New Series of Asynchronous Frequency-Controlled Motors for Mining Excavators

Resumo

This article provides the results of designing and developing the production of a new series of asynchronous low-voltage (LV) motors with a squirrel-cage rotor for mining excavators. The operating conditions of electric motors used in drives of mining excavators and other mining equipment are analyzed, and the basic specifications of dc motors that are usually used for this application are considered. The main requirements on electric drives and ac electrical machines for mining equipment are formulated. The lineup of the series of frequency-controlled asynchronous LV motors with a squirrel-cage rotor for the line of next-generation excavators is formed. When the series was designed, the number of its sizes was minimized. The concept of designing is presented. The energy characteristics of the designed machines are exposed. The typical dependences of the main energy and electromechanical characteristics on the rotor speed in the range of its adjustment are shown. The main results of laboratory and field tests of ac electric drives based on the designed electric motors are exposed. The application of electric machines in mechatronic systems of mining excavators is shown.