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!
Q. Show Elementary Synchronous Machines?
The polyphase synchronous machine operates with direct current supplied to the field winding (assumed to be on the rotor, which is usually the case) through two slip rings and with polyphase alternating current supplied to the armature (assumed to be on the stator). The rotormmf, which is obtained froma dc source, is stationarywith respect to the rotor structure.When carrying balanced polyphase currents, the armature winding produces a magnetic field in the air gap rotating at synchronous speed, as determined by the system frequency and the number of poles in the machine. But the field produced by the dc rotor winding revolves with the rotor. To produce a steady unidirectional torque, the rotating fields of stator and rotor must be traveling at the same speed. Therefore, the rotor must turn precisely at the synchronous speed.
The polyphase synchronous machine is one in which the rotor rotates in synchronism with and in the same direction as the rotating mmf wave produced by the stator. Thus for synchronous machineswith polyphase statorwinding, the following equation relatingmechanical and electrical angular speeds is satisfied:
or alternatively, the steady-state speed at which the machine operates is known as the synchronous speed, given by
where f is the frequency of the system of which the machine is a part and P is the number of poles of the machine.
Analogue Threshold switching a) Include a variable potential divider to the schematic diagram to control the transistor base voltage b) Include the potential divider compon
Q. A transistor in a fixed bias amplifier circuit was replaced by another transistor of beta equaling 150 instead of 60.if IB of transistor is equal to 100 microampere and collecto
A circuit realization of a NAND gate will now be developed. By connecting NAND gates together in various ways, one can synthesize other gates and flip-flops. Thus in principle, a s
if load is removed so which motor will run fast? series or shunt?
Q. What are the advantages of the n-channel MOSFET over the p-channel? The main advantage of the n-channel MOSFET over the p-channel is due to the fact that charge carriers in
Switching characteristics When a positive signal is applied GTO starts conducting before initiation of conduction anode current is zero and anode to cathode voltage Va
a) What do you mean by assembly procedures in FEM, discuss by taking suitable example of your choice. b) Write the potential energy equation for particular FE analysis of a prob
Explain the term Industry Standard Architecture Bus. The Industry Standard Architecture, bus has been approximately since the very start of the IBM-compatible personal computer
Explain frequency selective wave analyser with bandwidth
write a short note on Scale
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