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A 220 V, 1500 rpm, 11.6 A (armature current) separately excited motor is controlled by a single phase, full wave SCR converter. The armature resistance of the motor is 2 ohm. The ac source voltage is 230 V (rms) 60 Hz. Enough inductance is added to ensure continuous conduction for any torque greater than 25% of the rated value. (Ignore the rotational losses)
A.)Calculate the triggering angle for the speed of 1000rpm at the rated torque.
B.)Assuming that the torque is a fan-type, calculate the triggering angle for the motor speed of 900 rpm.
C.) Sketch the speed-torque characteristics showing the operating points of cases (A) and (B).
150 kVA, 2400/240 V single-phase transformer has the parameters. (a) Determine the equivalent circuit referred to the high-voltage side. (b) Find the primary voltage and voltage regulation when transformer is operating
An input signal of 10V at 0o and a frequency of 1592 Hz is applied to a series RLC circuit with resistor R = 100 ohm, inductor L = 40 mH, and capacitor C = 0.5 F. The value of the total circuit complex impedance is
The rotor of a 3phase, 5kw, 400v, 50Hz, slip ring indution motor is wound for 6 poles while its stator is wound for 4 poles. The approx average no load steady state speed when this motor is connected to 400v, 50Hz what is the supply
a road between fairbanks and nome, alaska, will have a most likely construction cost of $4 million per mile. doubling this cost is considered to have a probability of 30%, and cutting it by 25% is considered to have a probability of 10%.
50 kg of a certain gas is contained within a piston-cylinder assembly. the gas undergoes a processwhich the pressure volume relationship is PV = constant. (n=1.5) the given conditions as follows : p1= 6 bars, v1=0.2 cubic meters ,and v2= 0.4 cubic..
A silicon NPN bipolar junction transistor is to be used as an amplifier. What are the required bias conditions for this to occur If the emitter voltage is -3V, pick an acceptable base voltage and an acceptable collector voltage for the transistor ..
A tree-phase, 60Hz, 5MVA synchronous generator has balanced line-to-line voltages of 8320V at its terminals. if the generator is supplying power to delta-connected, balanced load of 5MVA at a 0.8 lagging power factor
A police K-band radar is operating, with transmit power of 1000 Watts and antenna gain of 300 in linear units. The radar unit is designed to detect a target with a radar cross-section (RCS) of 6 sq. meters and its receiver can detect a signal
A 360 nm thick film floats on the surface of the water. The indices of refraction of the oil and the water are 1.50 and 1.33, respectively. The surface of the oil is illuminated from above at normal incidence with monochromatic light.
The 8086 Microprocessor Operating Systems and System Interrupt services, Please help me write a program that will display the hex code for any key, or key combination, that is pressed on the keyboard.
Find all values of alpha such that the system is stable for K = 2. If the unity feedback closes around this G(s) and an input is a unit step r(t) = 1u(t), what is the stead-state error, e_ss, as a function of alpha and K?
In and Th are inputs and Out is the result. All parameters are 8-bit unsigned integers. A typical calling shows that the two inputs, In and Th, are passed on the stack and the return parameter Out, is returned in RegB.
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