Mechanical Characteristics Next, we will apply Newton's law to write the differential equations that model the mechanical portion of the DC motor. Write here the diff eqs. of the mechanical portion: Write here Newton's law (sum of the torques of the motor must equal zero): Write here the diff eqs. of the mechanical portion: Note that the electromagnetic torque is proportional to the current through the armature winding and can be written as the product of the velocity constant (K₁)times the current. The torque constant K depends on the flux density of the fixed magnets.

Mechanical Characteristics Next, we will apply Newton's law to write the differential equations that model the mechanical portion of the DC motor. Write here the diff eqs. of the mechanical portion: Write here Newton's law (sum of the torques of the motor must equal zero): Write here the diff eqs. of the mechanical portion: Note that the electromagnetic torque is proportional to the current through the armature winding and can be written as the product of the velocity constant (K₁)times the current. The torque constant K depends on the flux density of the fixed magnets.

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...

See similar textbooks

Similar questions

What is Equation to find Slip, Output horse power, Torque, Stator current, p.f, Efficiency, From this result and we have Frequency and poles this result from load test of an induction motor
Give the significance of Back emf in dc motor, What is the role of starter in motors? How the torque gets developed in the dc motor? Derive its relation.
(TRUE OR FALSE) - Energy conversion of DC generator is based on the principle ofproduction of dynamically terminal voltage. - Increasing the speed of DC motor, the back emf will decrease but theline current falls. - The current drawn by the armature of DC motor is directly proportionalto torque.
When drawing the steady state electrical model (for an AC induction motor), is the stator armaturre inductance considered? Why/Why not?
Find the Torque equation for the Dc motor seperately excited ؟
1. What effect does decreasing the field current below its nominal value have on the speed-versus-voltage characteristic of a separately-excited dc motor? 2. What effect does decreasing the field current below its nominal value have on the torque-current characteristic of a separately-excited dc motor? 3. What is the advantage of increasing the field current above its nominal value for a short time interval when starting a separately-excited dc motor?
A motor with polar moment of inertia Jdevelops torque according to the relationshipT = aω + b. The motor drives a load defined by thetorque–speed relationship TL = cω2 + d. If the fourcoefficients are all positive constants, determine theequilibrium speeds of the motor-load pair, andwhether these speeds are stable.
Determine the transfer functions from inputvoltage to angular velocity and from load torque toangular velocity for a PM DC motor rigidly connectedto an inertial load. Assume resistance and inductanceparameters Ra, La let the armature constant be ka.Assume ideal energy conversion, so that ka = kT .The motor has inertia Jm and damping coefficient bm and it is rigidly connected to an inertial load withinertia J and damping coefficient b. The load torqueTL acts on the load inertia to oppose the magnetictorque.
A four-pole 60-Hz 240-V-rms induction motor operates at 1750 rpm and produces 2 hp of output power. The load is a hoist that requires constant torque versus speed. Assume that the motor is operating in the range for which torque is proportional to slip and write an equation for motor torque in terms of slip when operating at rated voltage. Then modify the equation for operation from a 220-V-rms source. Estimate the speed when operating the hoist from a 220-Vrms source.
a. Qualitatively describe the magnetic field set up in the air gap of a four-pole three-phase induction motor by the currents in the stator windings. b. Give an equation for the field intensity as a function of angular position around the gap and time, defining the terms in your equation.
Explain the functioning and applications of hybrid stepper motors. With the help of neat diagrams, compare the functioning of hybrid stepper motors with permanent magnet DC motors,
4) Sketch the speed current characteristic for a common DC motor and describe the motor performance.