DEVICE FOR CONTROL OF ASYNCHRONOUS MOTOR VECTOR, METHOD FOR CONTROL OF ASYNCHRONOUS MOTOR VECTOR AND DEVICE FOR CONTROL OF ASYNCHRONOUS MOTOR DRIVE

摘要

FIELD: electricity.;SUBSTANCE: invention relates to the field of electric engineering and may be used to control asynchronous electric drive used in transport. Vector control device comprises the following components: facility (40) for calculation of command of secondary magnetic flow of asynchronous motor (6) with account of maximum voltage, which may be generated by inverse converter (4) on the basis of command of rotation torque coming from outside, DC voltage supplied into inverse converter (4), and angular frequency of inverse converter (4), which represents angular frequency of AC voltage brought out by inverse converter (4); facility (8) and (9) for generation of command of current of axis q and command of current of axis d in rotary system of coordinates of axes d-q, relative to the secondary magnetic flow of asynchronous motor (6) on the basis of command of rotation torque and command of secondary magnetic flow; facility for calculation of output voltage (section 14 of voltage calculation without noise, summator 17 and summator 18), which should be derived by inverse converter (4) on the basis of command of current of axis q, command of current of axis d and constant circuit of asynchronous motor (6); and facility (50) for generation of command of voltage/pulse-width modulation signal intended for control of inverse converter (4), to derive output voltage by inverse conveter (4).;EFFECT: provides for stable control of vector in the whole range from low to high speeds of asynchronous motor operation in absence of feedback circuit.;12 cl, 7 dwg