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.
The subsequent voltage-source multiplying DAC is to be utilized to convert the digital data stream "11" and "01" to an analog signal. It has 2-bit inputs and hence is capable of c
The frequency domain representation of a signal is shown below: i. What are the fundamental frequency and the corresponding period of this signal (shown in Figure )? ii. Pl
Q. Explain about Simplex communication? Simplex communication: Microphone and the earphone are transducer elements of the telephone communication system. Microphone converts
Q. Consider a series-carry synchronous counter with T flip-flops shown in Figure in which the AND gates carry forward the transitions of the flip-flops, thereby improving the speed
Complete Instruction Set of 8085 Microprocessor There are total 256 instructions in 8085 microprocessor. These instructions are classified into seven categories according
A three-phase transposed line is composed of one conductor per phase with flat horizontal spacing of 11 m as shown in Figure 1(a). The conductors have a diameter of 3.625 cm and a
Principal of Bipolar junction transistor: A bipolar junction transistor (BJT) is a three-terminal electronic device that constructed of doped semiconductor material and might
L=0.0053nH, C=15µF find the operating frequency of series LC circuit. What factors decides capacitance ..
Q. Explain low-frequency response of RC coupled amplifier. What are the reasons for reduction in gain at low frequencies? The RC coupled amplifier circuit contains capacit
Q. Draw the developed diagram of a simplex progressive 2 layer lap winding for a 4 pole generator with 12 coils clearly indicating the position of brushes. Sol. No. o
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