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A three-phase, 50-hp, 440-V, 60-Hz, four-pole, wound-rotor inductionmotor operates at a slip of 0.03 at full load,with its slip rings short-circuited. The motor is capable of developing a maximum torque of two times the full-load torque at rated voltage and frequency. The rotor resistance per phase referred to the stator is 0.1 . Neglect the stator resistance and rotational and stray-load losses. Find the rotor copper loss at full load and the speed atmaximumtorque.Compute the value of the per-phase rotor resistance (referred to the stator) that must be added in series to produce a starting torque equal to the maximum torque.
Connect the TTL output (square wave) of the "Audio Oscillator" to the "Scope Selector". Adjust the frequency of the square wave to 2 kHz. Observe and record the time domain pict
Explain Total internal reflection? The refractive index of a medium is defined as the ratio of velocity of light in vacuum to the velocity of light in that medium n x = C/V
INTRODUCTION : Electricity is one of the finest gifts of science to the mankind since just a flick of switch can flood the room with light or put on a fan, an air conditioner or a
(a) Evaluate whether the sinusoidal signal x(t) = A cos (2πf 0 t + θ) is an energy-type or a power-type signal. (b) Show that any periodic signal is not typically energy type, a
Applications of TV picture TUbe
A 100-kW, dc shunt generator, connected to a 220-V main, is belt-driven at 300 r/min, when the belt suddenly breaks and the machine continues to run as a motor, taking 10 kW from t
Precautions to be taken in carrying out repairs on HT and LT switch gear? Ans: The following precautions to be taken in carrying out repairs on LT and HT switch gears. a
OUT Output Instruction This instruction is used send data byte stored in the accumulator to the output port whose address specified in the instruction. The instruction
advantages and disadvantages of inductive coupling
What are the modes used in keyboard modes? 1. Scanned Keyboard mode with 2 Key Lockout. 2. Scanned Keyboard particular Error Mode. 3. Scanned Keyboard with N-key Rollover
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