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.
Applications of holography 1. Holography is used in the non-destructive tests by interferometic methods. In this method called double exposure holographic interferometry,
Q. What do you mean by diversifiability of total risk? Traditional finance theory assets that the rate of return on risk assets depends on the size of business risk, financial
what is force?
explain appropriate first aid procedure to be followed in case of electric shock
Check Sheets - Quality Tools for Improvement This might be an easy listing of items that could represent information in an efficient, graphical format. If the system under ana
Fixed bias (base bias): Diagram: Fixed bias (Base bias) This type of biasing is also known as base bias . In the instance above figure, the single power source (
You are required to design and document the hardware design for Lift Control Unit (LCU) as required by the questions/specification in section 2 above, based on a 68HC12D60 microcon
Q. What do you mean by Amplifier block? An amplifier can be modeled as a two-port device, that is, a box with two pairs of terminals designated as input and output, as shown in
A closed magnetic circuit of cast steel having a 6cm long path of cross-sectional area 1cm 2 and a 2 cm path of cross-sectional area 0.5 cm 2 . A coil of 200 turns is wound around
#question.draw the block diagram pf digital storage oscilloscope and briefly discuss about each block
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