Download e-book for kindle: Alternating Current Multi-Circuit Electric Machines: A New by Valentin Asanbayev

By Valentin Asanbayev

ISBN-10: 3319101080

ISBN-13: 9783319101088

ISBN-10: 3319101099

ISBN-13: 9783319101095

This booklet information an technique for consciousness of the sphere decomposition proposal. The ebook offers the equipment in addition to options and approaches for developing electrical computer circuit-loops and identifying their parameters. The tools constructed were learned utilizing the types of machines with laminated and reliable rotor having classical constitution. using such types are good well-known and simplifies sensible implementation of the acquired 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

According to the provisions accepted above, no-load conditions and under- load operation of an electric machine are implemented provided that E1m ¼ const. 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.

42 2 Fundamentals of the Field Decomposition Principle r1 U1 x1σ r'2 s x'2σ 0 • I '2 I1 Em Im U2' s xm • 0 Fig.

23), to determine the reactance values x11, x12, x22 and x21, it is necessary to have fluxes Φ11 ¼ Φ12 and Φ22 ¼ Φ21. 21). 21), the subscripts i ¼ 1 and k ¼ 1 should be used to determine reactance x11, the subscripts i ¼ 2 and k ¼ 2 should be applied to obtain reactance x22, the subscripts k ¼ 1 and i ¼ 2 should be used to calculate reactance x12, and the 22 2 Fundamentals of the Field Decomposition Principle subscripts k ¼ 2 and i ¼ 1 should be applied to determine reactance x21. As a result, the reactance values x11, x12, x22 and x21 can be expressed as 2m1 ðw1 kw1 Þ2 l0 2m2 w1 kw1 w2 kw2 l0 xmA ; x21 ¼ xmA pτ0 pτ0 2m1 w1 kw1 w2 kw2 l0 2m2 ðw2 kw2 Þ2 l0 ¼ xmA ; x22 ¼ xmA pτ0 pτ0 x11 ¼ x12 ð2:25aÞ ω μ τ2 1 0 0 where xmA ¼ π 2 δÁk , p is the number of pole pairs, l0 is the active length of the air H kδ gap, and τ0 is the pole pitch on the surface passing through the middle of the air gap.

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Alternating Current Multi-Circuit Electric Machines: A New Approach to the Steady-State Parameter Determination by Valentin Asanbayev


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