| 摘要 |
Procedure for determination of increase in excitation current (&Dgr;Јf, rot) due to variation in scattering flux of the excitation winding during the load on synchronous machine, being represented in details in Fig. 6 and that on the ground of the measured value of the excitation current (Jf) first determine (step 7) of the total increase and the excitation current (&Dgr;Јf, &Sgr;) due to saturation of magnetic circuit of the synchronous machine on the part of the stator and motor. &Dgr;Јf, &Sgr; = (Jf &Dgr; Jf, δ ) &Dgr;Jf,k And thereupon the value of the increase of the excitation current (&Dgr;Јfr), due to the additional saturation of magnetic circuit on the part of the rotor due to the scattered flux which comes from the increase in the excitation current with the load of the machine, is determined (step 9 and step 10) as a difference in the value &Dgr;Јfr = &Dgr;Јf, &Sgr; - &Dgr;Јf,s Where the value of the increase of the excitation current (&Dgr;Јf,s), due to the saturation of magnetic circuit on the part of the stator, is determined as a difference of the excitation currents Jf, 0 and Jf, δ (step 8) being determined from the characteristic of idle motion of the saturated (E0( Jf, 0 and the unsaturated E0(Jf, δ) machine, for previously determined value of the resultant of electromotor force (behind the reactance of scattering) Er .
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