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Using the approximate equivalent circuit in which the shunt branch is moved to the stator in put terminals, show that the rotor current, torque, and electro magnetic power of a poly phase induction motor vary almost directly as the slip, for small values of slip.
Q. Explain state-variable techniques? The matrix formulations associated with state-variable techniques have largely replaced the block-diagram formulations. Computer software
The field winding of a 200 V d.c. machine has a resistance of 20? and an inductance of 500mH. Calculate: (a) The time constant of the field winding (b) The value of curr
Q. With suitable examples differentiate between limiting and known errors. Sol. Limiting Errors (Guarantee Errors): The accuracy and precision of an instrument depends upon
applications of heterodyne wave analyzer
Production of Rotating Fields from Single-Phase Windings In this subsection we show that a single-phase winding carrying alternating current produces a stationary pulsating flu
Fourier transform (filtering) (i) Perform low pass filtering in the frequency domain. Write and m-file lowfft.m which does this operation. lowfft.m function lowfft im
Q. Adaptive control process in motor-speed control system? Figure illustrates the adaptive control process as applied to a motor-speed control system, which is based on adjus
Explain a couple
defination and working ?
Q. Why do we cascade amplifiers? Why is RC coupling the most widely used coupling between 2 stages of a cascading amplifier? The voltage or power gain or frequency response obt
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