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quiz7a - a x LU(U N Q Let t l M — Monday Mar 26 2001 BB...

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Unformatted text preview: a: x: LU! (U N Q Let: t: l M —\ Monday Mar. 26, 2001 BB 381 g Quiz 7 Name:____~___~ e- ’ Last First 1. A 3-phase, 60 Hz. induction motor has 8 pole $39» runs on full load at 864 rpm. Determine the following: (a) The speed of thejotat'mg field. (b) The full load slip. (c) The rotor frequency. (d) The speed of the rotor rotating field with respect to the rotor. (e) The speed of the rotor if the frequency becarne 50 Hz. everflhing else remainino constant. 9,) N35 - 7 : 8 - . ~8é4 _. . b) gm : L _ (o op 95:» <3 m = /ZD r1 .5 Mf/IVM/ ‘ 2. A 3- hase, 60 Hz., 4-pole, induction motor has a double-layer winding connected in P 7% Z W“ wye. The state: has 72 slots, and each coil has 3 turns with a coil pitch of 5/6. If the mnv:mnm “I!!! .u... -..1,. :4 J. , n .. IA-z , ...._ -... “W. per mm m y... — 4 A 1\_/ webet“, what wun‘ui he the induced voltage per t/ . ‘ ( I , phase in the stator? [.I/ff ' ’ r - f P , ~ '7 T . . / .- .6 v- _ , . A Aw-rnéy, :15 mL ~ ‘7 ’«r-v/MGQ -; i4 3 :73 SL091 [fioL Liz/wag; : n : 72 2. 6 3 Int} 5 a “ 1 b : [’0 r o , 9" w 5",: 64:4). ,rv:“‘\ (a -_ 2 : --~——~1~_: tQ-‘fs 45/4 -AIV ; l I. w ”bu-.5; éS/A L: A [0 °fl 7 / f‘ ,.-1\ 1% = to! L w [-57% e 0| gm 2 Q x bf! e... an. Newexewx d ,- : 4.44 x 65 x 72 v lax/{2x 0'53’4x0'9 =- ...
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