FIELD: engines and pumps.
SUBSTANCE: in control system of frequency converter there implemented is optimum control law as to minimum of total losses of electric drive for restricting its heating and enlarging the area of load moments allowable as to heating owing to optimum sliding considered during calculation of current error at specified values of rotation frequency and load moment.
EFFECT: enlarging functional capabilities of system and increasing service life of asynchronous motor owing to minimising electric power losses in electric drive at sliding within the whole range of rotary speed.
2 dwg
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