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categoryهندسة كهربائية
schoolبكالوريوس
event_available2026-07-13
السؤال
Transcribed Image Text:
Evaluate K, L,(K), where K2, is given in Problem 1.
10 If A is one reference frame and B another, show that (4KB)-1=BKA.
dos (= we) and
11 Equations (3.7-1)-(3.7-3) form an abc sequence. Express an acb sequence and transform
this set to the arbitrary reference frame using (3.3-1). Express fed
(w=-we).
12 Devise a transformation that yields only constants when w=w, for a balanced 3-phase
set with a phase sequence of acb.
13 Relate Fbs and Fes to Fas and Fds for a balanced 3-phase set with a time sequence of abc.
14 For steady-state balanced conditions the total 3-phase power and reactive power may be
expressed as
Pe=3V,1, cos [0ev (0) - Oei(0)]
Qe=3V,l, sin [ev (0) - Bei(0)]
Show that the following expressions are equal to those given above:
3
Pe=(Vastas + Vaslas)
3
Qe=(Vgslds - Vaslas)
2
15 Write the expressions for the currents in Figs. 3.10-1 and 3.10-2.
16' Assume the steady-state abc variables are of the form
Fas = √√2Fa cos wet
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