2. Consider the DC motor differential equation derived in the class. Suppose we aredriving the motor with constant input ū.a) Find the expression for steady-state angular speed of the motor in terms of ūand motor parameters J, L, R, K, Ka and b.di dw=Note that in steady state,0.dt dtb) Looking at the expression you have for speed of the motor, suggest aparameter that you should change to increase the speed.

Answered: 2. Consider the DC motor differential…

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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SPEED CONTROL OF A DC MOTOR BY FIELD CONTROL A dc shunt motor is taking 20 A from the 220-V source. The field and armature resistances are 110 ohms and 1 ohm, respectively. Find the the value of an external resistance connected series to the field winding that will cause the speed of the motor to double while taking the same amount of current from the source. Draw the schematic of the motor before and after the application of an external field resistance.
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200 +21. If maximum torque of an induction motor is kg-m at a slip of 12%, the torque at 6% slip would be...... kg-m. 1 (a) 100 (b) 160 (c) 50 (d) 40 B, 1993)
Question 3: Answer the following question below: a. Consider a permanent-magnet de motor with the following parameters: R-0.4ohm, L.-1 mH, kE-0.4 V/(rad/s), kr=0.4 Nm/A, and J-0.03 kg m. The rated torque of this motor is 5 Nm. Plot the steady state torque-speed characteristics for V.-60 V b. The motor in (a) is driving a load whose torque requirement remains constant at 5 Nm, independent of speed. Calculate the armature voltage V. to be applied in steady state, if this load is to be driven at 1,800 rpm. c. In an ECM drive, kg-kr-0.8 in SI units. Plot the phase currents and the induced-emf waveforms, as a function of 5, if the motor is operating at a speed of 150 rad/s and delivering a torque of 7 Nm.
A permanent-magnet automotive fan motor draws 20 A from a 12-V source when the rotor is locked (i.e., held motionless). a. Find the armature resistance. b. Find the maximum developed power that this motor can produce when operated from a 12-V source. c. Repeat part (b) for operation at 10 V (this represents a nearly dead battery) and at 14 V (this is the terminal voltage during charging of the battery after the engine is started).
electrical machines A 50-kW, 460-V, 50 Hz, two-pole induction motor has a slip of 5% when operating a full-loadconditions. At full-load conditions, the friction and windage losses are 700W, and the core losses are600 W. Find the following values for full-load conditions:a. The shaft speedb. The output power in wattsc. The load torque in N-m.d. The induced torque in N-me. The rotor frequency in Hz.
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Please answer questions and please ensure each answer is labeled
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A three-phase induction motor is rated at 5 hp, 1760 rpm, with a line-to-line voltage of 220 V rms. The motor has a power factor of 80 percent lagging and an efficiency of 75 percent under full-load conditions. Find the electrical input power absorbed by the motor under full-load conditions. Also, find the rms line current.
ulwa Ir CJI A:0E Classroom a docs.google.com A 250 V, DC shunt motor has shunt field resistance of 250 ohm and an armature resistance of 0.25 ohm. for a given load torque and additional resistance included in the shunt field circuit, the motor is running and drawing an armature current of 20 A, if a resistance of 250 ohm is inserted in series with the field, the load torque remaining the same, find out the initial speed if the new speed is 3000 r.p.m. * 1531.25 r.p.m 2939 r.p.m. 5877.55 r.p.m. 1500 r.p.m.

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