In a PMDC motor, when armature is rotated at 100rpm, an emf of 2V is developed across its terminals. For this motor, calculate the armature current flow required to generate a torque of 0.4Nm.

232 Views

In a PMDC motor, when armature is rotated at 100rpm, an emf of 2V is developed across its terminals. For this motor, calculate the armature current flow required to generate a torque of 0.4Nm.

nivedithapdvg 20th Oct, 2020

Answer

Answer Later

Report

Answer (1)

Priya 26th Oct, 2020

Required torque (T) = 0.4 Nm

Eb = 2V

Mechanical Power delivered = P = T*w = Eb* Ia

Eb=back emf

Ia = Amateur current

w = Angular frequency

w = 2pi * n /60 = 2pi*100/ 60 = 10.47 rad/seconds

from the previous equation

Ia = T*w/Eb = 0.4 * 10.472 / 2 = 2.0944 A

Like Share

Related Questions

the emf of a primary cell is 2V . when it is short circuited , it gives a current of 4 A . Its internal resistance in ohm is

4776 Views

speed ratio of an electric motor influences the maximum torque generated justify

50 Views

A short shunt compound generator delivers 30A to the load at terminal voltage of 220V. The resistances of armature, series and shunt field are 0.05 , 0.03 and 250 . Find out the current flowing through the armature and the voltage across the armature. The voltage drop per brush is 1V.

3256 Views

In a uniform electric field, a planar surface is rotated. When does the electric field flux across the surface reach its peak?

7 Views

the frequency of rotor current in an induction motor

11132 Views

Applications for Admissions are open.

MAHE Manipal M.Tech 2025

Apply

NAAC A++ Accredited | Accorded institution of Eminence by Govt. of India | NIRF Rank #4

Graphic Era (Deemed to be Uni...

Apply

NAAC A+ Grade | Among top 100 universities of India (NIRF 2024) | 40 crore+ scholarships distributed

Indrashil University | B.Tech...

Apply

Apply for B.Tech | AICTE Aproved | UGC Recognized | International Collaborations for Global Edge | 100% Placement Assistance

Manav Rachna-MBA Admissions 2025

Apply

41000+ Alumni network | Students from over 20 countries

Manav Rachna-B.Tech Admission...

Apply

NAAC A++ Grade | NBA Accredited B.Tech programs | 41000+ Alumni network | Students from over 20 countries

JSS University Noida MBA 2025

Apply

170+ Recruiters Including Samsung, Zomato, LG, Adobe and many more | Highest CTC 47 LPA

View All Application Forms

Trending Articles/News

Download the Careers360 App on your Android phone

Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile

150M+ Students

30,000+ Colleges

500+ Exams

1500+ E-books