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!
Explain the Cylindrical or Round Rotors?
All synchronous machines have a similar stator design and it is actually the rotor construction that makes them different. The rotor is also made of punched laminations that are stacked together for the same reasons as in the stator case. There are the two main types of rotor design. For high-speed operation, the 2-pole or 4-pole cylindrical or round rotors are commonly used with slots on their periphery to house the field windings (for 50-Hz supply, the respective speeds are 3000-rpm and 1500-rpm as indicated by the above expression). Figs.2 and 3 show the construction and winding arrangement of such rotors.
Figure: 4-pole round rotor with a field winding
Figure: Finite Element (FE) models and structure of 8-pole diesel generator (left) and 2-pole turbo-generator (right)
For this machine type the air-gap is approximately constant (ignoring slotting effects). If operated as a generator, the prime mover is normally a steam or gas turbine rotating at 22000-rpm coupled through a speed reduction gearbox or, for smaller machines, a direct-coupled diesel engine. Due to high operating speeds and consequent relatively large centrifugal forces, there is normally a design limit imposed on the rotor diameter. Hence rotor length to diameter ratios of, say, 6:1 are typical for round rotors with the axis of rotation being always horizontal.
pole
Electron congratulations
Q. Suppose a ROM holds a total of 8192 bits. (a) How many bits long would the individual addresses have to be? (b) If the bits are organized into 8-bit memory words or bytes,
Q. A magnetic circuit is found to have an ac hysteresis loss of 10 W when the peak current is Im = 2 A. Assuming the exponent of Bm to be 1.5, estimate Ph for Im = 0.5A and 8A.
what is the literature review about wye delta transformation?? for 3 paragraphs atleast*
Q. A Silicon Transistor Whose Common Emitter Output Characteristics Are Shown In Dig Is Used In The Circuit With V cc =22.5v, R c =5.6k, R e =1k, R 2 =10k, And R 1 =90
Q. Write a short note on heat sink For transistors handling small signals ,the power dissipated at the collector is small.Such transistors have little chances of thermal runawa
Q. What do you mean by Dial Pulses? Dial Pulses: Dial pulsing (many times known as rotary dial pulsing) is the method originally used to transfer digits from a telephone set
What are Shift Register Counters? Two of the main common types of shift register counters are the Ring counter and the Johnson counter and They are basically shift registers wi
For the RC phase-shift oscillator if c=1pF and R=10K determine the value of Rf
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