A device for dynamic determination of the parameters of electrical asynchronous machines

摘要

The device consists of a block (1) modification of inputs, a block (2) determining the internal stress of the block (3) determining the active power, the block (4) determine the equivalent resistance of the rotor unit (5) determining the currents of the rotor unit (6) determining the magnetizing current , a block (7) determining the magnetizing inductance and the block (8) determining the rotor resistance, hereinafter blocks (1, 2, 3, 4, 5, 6, 7, 8). Instant value of the associated stator voltage u.sub.sab.n.mezi phases b, the instantaneous value of the associated stator voltage u.sub.sac.n.mezi phases aac, instantaneous value of stator current and ĺ.sub.sa.n.fáze, immediate the value of the stator current phase of the LSB b, f.sub.snnapájecího frequency voltage, the rotor speed n.sub.mnotáčení and values ​​of the four parameters of induction motor, and resistance R.sub.snjedné phase stator windings, the leakage inductance L.sub.as.n .This phase stator winding, the leakage inductance L.sub.or.n.jedné phase rotor winding L.sub.or.na number of pole pairs p.sub.pnasynchronního engine are introduced into the block (1) and processed into electrical angular velocity of .omega ..sub.snnapájecího voltage electrical angular velocity .omega..sub.mnotáčení rotor, stator voltage component U.sub.sd.nv d-axis, the stator voltage component U.sub.sq.nv axis q component of stator current I. sub.sd.nv da axis component of the stator current I.sub.sq.nv axis q. These values ​​are in the block (2) processing a folder of internal tensions U.sub.ld.nv d-axis, internal voltage component U.sub.lq.nv axis qa absolute value of the internal voltage U.sub.1.n .. These output variables and output variables of the block (1) are processed in the block (3) on the immediate inner power P.sub.1.n .. the output values ​​of the blocks (1, 2, 3) are processed in the block (4) equivalent active resistance R.sub.req.n.rotoru. Output variables of blocks (1, 2, 4) are processed in the block (5) on the folder rotor current I.sub.rd.nv da axis rotor current folder I.sub.rq.nv axis q, which together with the outputs of the block (1) processed in the block (6) on the folder magnetizing current I.sub..mi.dnv d-axis, the magnetizing current component I.sub..mi.qnv axis qa absolute value of the magnetizing current I.sub..mi. .n .. the output values ​​of the blocks (1, 2, 6) are processed in the block (7) on the magnetizing inductance L.sub..mi..n .. the output values ​​of the blocks (1, 4) are processed in block (8) R.sub.rnrotoru resistance value and the value of output values ​​of blocks (7, 8) values ​​of the output values ​​of the entire facility.