March 7, 2017

Alternating Current Multi-Circuit Electric Machines: A New by Valentin Asanbayev

By Valentin Asanbayev

This publication info an procedure for attention of the sector decomposition suggestion. The publication offers the tools in addition to options and techniques for constructing electrical laptop circuit-loops and opting for their parameters. The tools constructed were discovered utilizing the versions of machines with laminated and good rotor having classical constitution. using such versions are good well-known and simplifies functional implementation of the bought results.

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Extra resources for Alternating Current Multi-Circuit Electric Machines: A New Approach to the Steady-State Parameter Determination

Example text

The resulting emf of the rotor winding E2p is determined from the condition in the form of E2р ¼ E2 þ E12 ð2:5Þ The emfs E1 and E21 induced in the stator winding and emfs E2 and E12 produced in the rotor winding can be represented by the corresponding total own reactance values (total reactance values of self-induction) and reactance values of mutual induction of the stator and rotor windings. Since the values of emfs E1 and E12 are the result of fluxes created by the currents in the stator winding, and as the values of emfs E2 and E21 are induced by the fluxes produced by the currents in the rotor winding, we can have ðÀE1 Þ ¼ jx1 I 1 ; ðÀE21 Þ ¼ jx21 I 2 ðÀE12 Þ ¼ jx12 I 1 ; ðÀE2 Þ ¼ jx2 I 2 ð2:6Þ where x1 and x2 represent the total own reactance (total reactance of self-induction), and x21 and x12 also reflect the reactance of mutual induction of the stator and rotor windings.

Under these conditions, an action of the load component of the 0 stator mmf F1 is limited in a way such that it balances the rotor winding mmf F2. , F1 ¼ À F2. Therefore, the load components of the stator mmf F1 and rotor mmf F2 do not form the total field (flux) of mutual induction. This provision means that the values of the current Im and mmf Fm remain the same at both no-load conditions and under-load operation of an electric machine. At under-load operation, the current of the stator winding is increased compared 0 to the current at no-load conditions Im by the amount I1 necessary to compensate the rotor mmf F2.

17) then take the form À Á À 0 Á ¼ jx1σ I 1 þ ðÀE1m Þ ¼ jx1σ I 1 þ jxm I 1 þ I 2 ¼ jx1σ I 1 þ ðÀEm Þ 1р  ÀE  À 0 Á À 0 0 0 0 Á 0 0 0 ÀE2p ¼ jx2σ kE kI I 2 þ ÀE2m ¼ jx2σ I 2 þ jxm I 1 þ I 2 ¼ jx2σ I 2 þ ðÀEm Þ 0 Im ¼ I1 þ I2 ð2:36Þ 0 0 0 where (ÀEm) ¼ jxm (I1þI2 ); E2p ¼ E2pkE; x2σ ¼ x2σ k2; k2 ¼ kEkI. 36), we have Em ¼ E1m ¼ E2m . Here, the emf Em is caused by the magnetizing flux Φm. Therefore, the value of emf Em represents the 0 magnetizing emf of an electric machine. With this condition Em ¼ E1m ¼ E2m in 28 2 Fundamentals of the Field Decomposition Principle Fig.

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