Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
D.C. Generator
A magnetic field is produced by afield coil supplied with a D.C. current and a rotor is placed between shaped pole pieces and wound with an armature winding. The diagram above shows only one turn of the armature winding, but in practice there will usually be more than one. The ends of the armature winding are connected to two slip rings that rotate with the armature and the voltage generated is 'picked off' the rings by brushes that bear against the slip rings
The emf generated may be calculated either using the equation for the emf induced in a conductor of length l moving
in an electric field of flux density B webers/m 2
e=B.l.v
with a velocity v m/sec or by considering the rate of change of flux linkage with the armature coil. We shall use the latter method. Due to the shaping of the pole pieces, the flux threading through a particular armature coil is constant at + max as it turns from O4 to O1 and decreases linearly from +Ømax to -Ømin while the rotor is turning from O1 to O2 . It is constant again during O2 to O3 and then increases linearly during O3to O4. (ref graph)
Distinguish between ferromagnetic and paramagnetic materials, mentioning at least one example of each. Ferromagnetic Materials: These are materials wherein magnetic dipoles i
how solving circuit by it
A three-phase, wound-rotor induction machine, with its shaft rigidly coupled to the shaft of a three-phase synchronousmotor, is used to change balanced 60-Hz voltages to other freq
Circuit Symbols for MOSFET A range of symbols are employed for the MOSFET. The basic design is usually a line for the channel along with the source and drain leaving it at rig
Why does digital signal processing require specialized hardware? A) It needs to perform analog as well as digital functions. B) General-purpose microprocessors cannot perfor
what is south africas perspective?
What are the broad principals that will be applied in product design to facilitate automated assembly ?
Q. For the logic circuit of Figure, construct a truth table and obtain the minimum SOP expression.
Programming languages As we have seen the evolution of computer hardware similarly programming languages also have their history of development from machine language
What is the impedance Z between terminals A and B of the networks shown below? Express your answers in polar form. Three voltages represented by v 1 (t)=100cosωt, v 2 (t)=7
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd