FIELD: alternating current electric drives. SUBSTANCE: method involves alternation of current voltage value in converter 1 depending on frequency according to given function, control of instantaneous value of converter 1 in order to achieve given frequency and output voltage of converter 1. This is done by means of keeping shape of current which is output by converter 1 as three- dimensional induction curve on pole pitch of electric motor 4. Likeness of shape is controlled by calculation unit 2. EFFECT: increased efficiency, decreased vibration and noise. 2 dwg
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Authors
Dates
1997-10-27—Published
1996-01-31—Filed