Dc motor characteristics, Electrical Engineering

Assignment Help:

Q. DC Motor Characteristics?

We gain an understanding of the speed-torque characteristics of a dc motor from Equations. In shunt motors, the field current can be simply controlled by the use of a variable resistance in series with the field winding; the load current influences the flux only through armature reaction, and its effect is therefore relatively small. In series motors, the flux is largely determined by the armature current, which is also the field current;

it is somewhat difficult to control the armature and field currents independently. In the compound motor, the effect of the armature current on the flux depends on the degree of compounding. Most motors are designed to develop a given horsepower at a specified speed, and it follows from Equation that the angular velocity ωm can be expressed as

1356_DC Motor Characteristics.png

Thus, the speed of a dcmotor depends on the values of the applied voltage Vt, the armature current Ia, the resistance Ra, and the field flux per pole φ.


Related Discussions:- Dc motor characteristics

Semiconductors, Charge density In a semiconductor

Charge density In a semiconductor

Determine modulation index, Q. If the output signal fromanAMmodulator is gi...

Q. If the output signal fromanAMmodulator is given by u(t) = 5 cos 1800 πt + 20 cos 2000 πt + 5 cos 2200 πt , determine: (a) The modulating signal m(t) and carrier c(t). (b)

Telephony, connection of STS MUX/DMUX

connection of STS MUX/DMUX

Clippers, dis advantage of series clippers?

dis advantage of series clippers?

Explain einstein relation, Explain Einstein relation. Einstein relation...

Explain Einstein relation. Einstein relation: There exists a significant relation between the diffusion constant and the mobility. It is termed as the Einstein relation and

Event triggering, what is event triggering related to digital storage oscil...

what is event triggering related to digital storage oscilloscope?

Octal number systems, Octal Number Systems Now the  question may  arise...

Octal Number Systems Now the  question may  arise in one mind  that why  to learn  octal  number  system when  neither  human  nor the  digital  systems  uses. It  hence it is

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd