1. For the motor load, torque -speed curve shown below, solve the following questions. R 2. T (N-m) 10 J₁ 10V 100 №₁ D₁ N₂L D₂ w (rad/s) OL(t) J₂f N₁ = 100 N₂ = 1000 J₁ = 1 kg.m² J2 = 100 kg.m² D₁ = 1 N·m-s/rad D2 = 100 N·m-s/rad Back emf: vo(s)=Kb₁(s) d01 where Ω1(s)= dt Torque developed by the motor: T₁=K₁ la(s) 1) Find a relationship between the current (la(s)), voltage (Vs(s)), and the back emf (V₁(s)) (the equation for the dashed-box part) 2) Find the no-load speed (no torque is applied) from the torque-speed curve. 3) Find the stall torque (rotor is not turning) from the torque-speed curve. 4) Find the total inertia at the armature of the motor. 5) Find the total damping at the armature of the motor.

1. For the motor load, torque -speed curve shown below, solve the following questions. R 2. T (N-m) 10 J₁ 10V 100 №₁ D₁ N₂L D₂ w (rad/s) OL(t) J₂f N₁ = 100 N₂ = 1000 J₁ = 1 kg.m² J2 = 100 kg.m² D₁ = 1 N·m-s/rad D2 = 100 N·m-s/rad Back emf: vo(s)=Kb₁(s) d01 where Ω1(s)= dt Torque developed by the motor: T₁=K₁ la(s) 1) Find a relationship between the current (la(s)), voltage (Vs(s)), and the back emf (V₁(s)) (the equation for the dashed-box part) 2) Find the no-load speed (no torque is applied) from the torque-speed curve. 3) Find the stall torque (rotor is not turning) from the torque-speed curve. 4) Find the total inertia at the armature of the motor. 5) Find the total damping at the armature of the motor.

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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B/ A shunt generator delivers 450 A at 230 v and the resistance of the shunt field and armature are 502 and 0.03 2 respectively. calculate the generated e.m.f
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A 2300V, 1000 kVA, 0.8 lagging power factor, two-pole, 60HZ, Wye-connected, synchronous generator has a synchronous reactance of 1.1 ohms and an armature resistance of 0.15 ohms. Its losses due to friction and friction with the air are 24 kW and its core losses are 18 kW. The field circuit has a dc voltage of 200v and a maximum of 10A. The field circuit current is adjustable in the range of 20 to 200 ohms.The magnetization curve of this generator is shown in the figure below.a) How much field current is required for Vt to equal 2300V when the generator is running without load?b) What is the voltage generated intermittently by this machine at nominal conditions?c) How much field current is needed to make the voltage at the terminals Vt=2300V when the generator works in nominal conditions?d) How much power and torque should the prime mover of the generator be able to supply?
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Question-1: The induced magnetic force, given by Find = i (Lx B), is called motor action and the induced magnetic force, given by eina = (V × B). L, is called generator action. a) Explain the role of induced forces in generators when we expect generators to be all about induced voltages and not induced forces? b) Explain the role of induced voltages in motors when we expect motors to be all about induced forces and not induced voltages?
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