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!
Find the Machine Torque Angle
(a) What are the four operating conditions that must be satisfied before a synchronous machine can be synchronised to an electrical grid?
(b) A three phase Y-connected cylindrical rotor synchronous generator is operating into a grid at its rated l-l voltage of 6000V, with a rated stator current of 200A at a 0.8 lagging power factor. If the generator has a synchronous reactance of Xs = 10 Ω /phase and negligible stator winding resistance, find:
i. The real and reactive power flow into the grid.
ii. The internal back-emf Eo.
iii. The machine torque angle δ (in electrical degrees).
(c) Calculate the new torque angle, stator current and machine power factor if the field excitation is changed to reduce the generator internal back-emf to 1.2 pu. Is the generator supplying or sinking reactive power? Sketch a phasor diagram for this operating condition.
(d) Sketch the capability diagram for this synchronous machine for 1 pu and 1.5 pu excitation levels, and show how the practical operating region can be identified on this diagram by considering various machine operating limits.
Find out the friction force: The cord passes over a massless and frictionless pulley, carrying a mass M 1 at one end and wrapped around a cylinder of mass M 2 which rolls on
I need to have a matlab code with torque and force as differential constraint equations and tractrix constraint also included. The motion may be in a plane and with 5 or 6 links in
what is moment of resistance?
An inside cylinder locomotive has its cylinder centre lines 0.70 m apart and has a stroke of 0.60 m. The rotating mass per cylinder is similar to 150 Kg. and the reciprocating mass
Indicator diagram and indicated power: An indicated diagram is graph between pressure and volume. The former being taken on the vertical axis and latter on the horizontal axis
Files: Files are used to remove excess metal by cutting action. These can be classified according to their length, shape, cross-section.
Ceramics, Refractory And Abrasive Materials Introduction There are some situations in practice where high temperatures are occupied. Besides creating that temperatures en
A simple band brake performs on a drum of 600mm in diameter that is running at 200 r.p.m. The coefficient of friction is 0.25. The brake band has a contact at 270 o one end is fas
A powered metal-working crank press (a generic press is shown at the end) has been designed to be capable of punching blanks from mild steel sheet up to 3 mm thick. 1. the ultim
Composite Materials While two various materials which neither react chemically nor dissolve in every other are combined together so they form a composite materials. Individual
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd