P6) A 3 phase, 2300V, 60HZ12-pole, Y-connected synchronous motor has X, = 4.5 ohm and negligiblestator resistance. The machine is connected to an infinite bus. And draws 250 A at a 0.8 pf lagging.a) Determine the output power (neglect rotational losses)b) Determine the power to which the motor can be loaded slowly without losing synchronism.Determine the torque, stator current, and supply power factor for this condition.

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Answered: P6) A 3 phase, 2300V, 60H212-pole,…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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A 420 Vdc, 8 pole Compound DC motor runs at 729 rev/min when drawing a load of 60 A from the supply when meeting a load demand of 28 kW. The compound motor has a Lap connected armature with 816 conductors. The Armature, Interpole, Series, and Shunt resistances are 0.295 Q, 0.0155 Q, 0.00118 Q, and 147 Q respectively. The series field has 6 turns per pole while the shunt field has 2800 turns per pole. Under full load conditions, the shunt current is 3.75 A, and the Friction and windage loss is Pf/w = 0.782 kW. Consider c =6 for lap winding. Assume constant shunt current and friction and windage loss, determine for a reduced output load of 14.5 kW; (a) The new armature current; (b) The new speed of the motor
See attached.
The develop motor Torque is in .N.M when frequency 60HZ and six poles * O 24 O 20 14 O 12 The Mechanical Power is .kw Which The Motor Would Develop For This Field Excitation. * 2167,34 21677.63 1495.56 11693.98
plz solve my all question,,i need this..plz don't scrept any question ....plz plz
A 400 V, 4 Pole, 3-phase, 50 Hz star conp d inducion motor has a rotor resistance and reactance per phase equal to 0.012/Phase and 0.10/mhase respectively. The magnitude of the induced e.m.f. in the rotor at standstill condition is 57 725V/Phase The full-load speed is 1440 r.p.m. Determine: i) The starting torque. ii) The addifional rotor resistance required to produce 577 of the maximum torque at starting. iii) The frequency of rotor current at full-load.
45) A 40hp, 440V, four pole dc motor has an armature wave-wound with 846 conductors and the commutator has 141 segments. The full load efficiency is 85% and the shunt current is 1.25A. If the brushes are shifted backward through segments from the geometric neutral axis, calculate (a) The demagnetizing ampere-turns per pole (b) The distorting ampere-turns per pole on full load.
A3 phase, 1500 rpm, 2200 V, star connected synchronous motor having per phase impedance 0.4 + J9 ohms. On some excitation armature induces 2900 V. Find the maximum torque developed by the motor before the motor is separated from synchronism.
A 6600 V, 3 phase, star connected synchronous motor draws a full load current of 80 A at 0.8 p.f. leading. The armature resistance is 2.2 ohm and synchronous reactance 22 ohm per phase. If the stray losses of the machine are 3200 W, determine : a) the induced emf (b) output power (c) efficiency.
A 30 kW, 460 V, 1180 rpm, 3 -phase, 60 Hz, Y-connected induction motor has a full-load efficiency of 93.6% and a power factor of 0.83 lagging. The resistance of the stator winding per phase is 0.14 N/phase. Determine: (a) The full-load active power drawn by the motor (b) The full-load line current (c) The full-load rotor winding losses (d) The rotational losses
Find v1 and v2 in the circuit shown, using voltage and/or current division.
A 3-phase, 48 kW, start-connected permanent magnet (PM) motor has a rated speed of 6600 rpm when supplied from a 110 Hz supply. The d-axis and q-axis inductances are La= 3.5mH and Lg= 4.7mH, respectively. The armature resistance and rotational losses are negligible. The motor operates without field weakening up to 6600 rpm, and a negative direct-axis current is imposed if the motor operates at speeds above 6600 rpm. The no-load terminal line-to-line voltage at 5000 rpm is 420 V (RMS). a. Determine the permanent magnet flux linkage. b. Calculate the rated phase current. c. Calculate the rated line to line voltage of the PM motor. с. d. At a speed of 7300 rpm, the PM motor operates in field weakening mode with a direct axis current of -30A and produces a torque of 30 Nm. Determine the per-phase current at this operating condition.
9

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