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An induction motor has an efficiency of 0.80 when the load is 50 h.p. At this load , both stator copper loss and rotor copper loss are equal to the core losses . The mechanical losses are one -fourth of the no load losses . Calculate the slip.
use series to approximate values of functions. Therefore it is important that we know for which values of x the series will provide good approximations of the given function. Based on the graph can we use the MacLaurin series expansion to approxim..
Transmit this data wirelessly to a base station for storage. How much bandwidth would you need.
In the movement of a robot arm, the arm is commanded to go from position 1 to position 5. Discuss the rise time, the overshoot, the settling time, and the steady-state error as it applies to the movement of a robot arm
In a silicon bar uniformly dopes with 10^16 phosphorus atoms per cubic cm and 5*10^14 boron atoms per cubic cm. Calculate the mobile electron and hole concentrations for this bar.
Write an assembly code segment that calls the subroutine New Function if bits 5 and 6 of PORTD equal 1. Write the same code segment in part (a) using structured assembly constructs.
A 3 phase, 60 Hz, 4 pole, 440-v (line-line, rms) induction motor drive has a full-load (rated) speed of 1746 rpm. The rated torque is 40Nm. Keeping the air gap flux-density peak constant at its rated value
1. Find IC, IE and IB for a PNP transistor if IS = 10-16 A, ßF = 75, ßR = 0.40, VEB = 0.75V and VCB = +0.70V. 2. The total transport current iT traversing the base of a BJT is determined by IS, v BE and v BC.
If a third attempt is made within 20 seconds, a waiting period of 20 seconds is required before additional attempts can be made to start the motor. While waiitng to make additional attempts to start the motor.
Select the appropriate resistor to add to the circuit in order to reduce the voltage across the bulb to the appropriate level. Choose the nearest 10-% resistor value and determine what its power rating should be.
The acceptor concentration in a particular junction is 10^6/cm^3 and the donor concentration is 10^15/cm^3. Assume ni=1.5*10^10/cm^3. Find the junction built-in voltage.
A three phase synchronous motor has the synchronous reactance of 2.1 Ohm and draws 250 A with a lagging power factor for an excitation voltage of 1327 -15 degree per phase. Find the terminal voltage of the motor and power factor of the motor.
Design a 7.5-V zener regulator circuit using a 7.5-V zener specified at 12mA. The zener has an incremental resistance r(z) = 30 ohms and a knee current of 0.5mA. The regulator operates from a 10-V supply and has a 1.2k-ohm load.
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