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Q. Nonsalient-pole rotor construction?
The nonsalient-pole (smooth or cylindrical) rotor construction is preferred for high-speed turbine-driven alternators (known also as turbo alternators or turbine generators), which are usually of two or four poles driven by steamturbines or gas turbines. The rotors for suchmachines may be made either from a single steel forging or from several forgings shrunk together on the shaft.
The maximum value of the induced voltage is
which are identical in form to the corresponding emf equations for a transformer. The effect of a time-varying flux in association with stationary transformer windings is the same as that of the relative motion of a coil and a constant-amplitude spatial flux-density wave in a rotating machine. The space distribution of flux density is transformed into a time variation of voltage because of the time element introduced by mechanical rotation. The induced voltage is a single-phase voltage for single-phase synchronous machines of the nature discussed so far. As pointed out earlier, to avoid the pulsating torque, the designer could employ polyphase windings and polyphase sources to develop constant power under balanced conditions of operation.
Q. The self and mutual inductances of a machine with two windings are given by L 11 = (1 +sin θ), L 22 = 2(1 + sin θ), and L 12 = L 21 = M = (1-sin θ). Assuming θ = 45°, and le
Factors Affecting High Commercial Losses Commercial losses in our country occur mainly because of the following reasons: Incorrect assessment of the energy consum
Normal 0 false false false EN-IN X-NONE X-NONE Permanent Magnet Stepper Motor The s
Conditional Call Instruction Similar to conditional jump instructions there are conditional call instructions also based on various flags.
Can we use ohm''s law for AC CIRCUITS?
How single stepping can be done in 8086? By setting the Trace Flag (TF) the 8086 goes to single-step mode. In this mode, after the implementation of every instruction s 8086 ge
Question 01 Convert the following binary numbers to its specified number system 111.101 (2) to octal 10111 (2) to decimal 0.1010 (2) to hexadecimal 1011.11 (2)
For Parity Flag PRE ( Return on Parity Even) and RPO ( Return on Parity Odd) Instructions RPE returns from the subroutine to the calling program if parity flag is not s
Compare with Register The contents of the register are compared with the contents of the accumulator here register may be any one of the A, B, C, D E, H, or L reg
Illustrate about the Digital televisions Microprocessor would be used to control the below features, for instance: - Automatically tuning into television stations - allow
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