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Notes on Alternating Current Phenomena

Notes on Alternating Current Phenomena


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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 Excerpt: ...terms and eliminating the "j" term in the Lononinator by the U3tral method, gi/ss the thxrd equation of Art. 102; i wh-ls equation, '.he r j tern, const V.v.t ing the second line of the tuo'-ator, should bo positive! ini ced of neg&tive. The equation Icj seal ting to.-que, cn p. 255, comes from that on tag-250. Since the color impedance, z. appears in the denoninator of the iauations for starting torque on p. 255, for maximum torque cn p. 250, '-a ir.exi2.um power and slip at maximum power on p. 253, these quantities "-v/ inversely wi th the ir.pedance. With a given ir.pedar.ee, the slip t.-laincm output by p. 253 increases with secondary resistance and: here; rthe speed varies inversely as the seconder;' or armature resistenco.!r: general, the efficiency varies inversely vrlth the internal losaes: .'id therefore varies inversely vritl. the internal resistance and(ir.diectj.y) with tho internal impedance. TVs two values of secondary resistance for maximum torque are il.uc-trated in Fig. 116, p. 200, where the curves for r =.045 and for 'Is.75 give the same starting torque. The crossing points of other io-que-sllp curves illustrate double values of secondary resistance: or oth.ee torque values end other slip values.-.rl. 163, p. 253. With s=0, the equation for current at top of page--nd the equations for power and torque at top of p. 250 reduee to f'oivaa hero given.. Krt, 1S-.?/hen speed is near synchronism, the slip is small' and the?ration for current near the top of p. 243 is but little effected by l-'.as in tahlch slip appears as a multiplier; dropping these reduces the sqieition to that at top of p. 2.5s, raking i-E2, ((s/rt + g2 + b JV'2 Similarly neglecting products of small quantities, the equation t"-t tangent of angle of...


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Product Details
  • ISBN-13: 9781130133622
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 46
  • Spine Width: 3 mm
  • Width: 189 mm
  • ISBN-10: 1130133621
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 100 gr

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