Engineering, 03.07.2020 04:01 KIAZTUNEZ

Q1. A 3.phase full wave controlled rectifier is fed from 3-phase, 400V,50HZ source and is connected to load taking a constant current of 35A. (a) Draw the waveform of output
voltage. (b) Calculate average value of load voltage for a firing angle of 20°
(c) average load power,
(30 mark)
Q2. Explain with necessary equation and drawing the principle operation of the boost
chopper
(35 mark)
Q3. A square wave output single phase bridge inverter supplies an 80 resistor with 40mH
inductance load. Load fundamental rms voltage is 135V at 60Hz. Calculate:
(a) voltage of the dc supply.
(b) rms value of load voltage, load current and third harmonic voltage.
(c) Load power
(35 mark)

Answers: 3

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

Answers: 1

Answer

Engineering, 04.07.2019 18:20

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?

Answers: 3

Answer

Engineering, 04.07.2019 18:20

Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.

Answers: 3

Answer

Engineering, 04.07.2019 18:20

Air flows over a heated plate àt a velocity of 50m/s. the local skin factor coefficient at a point on a plate is 0.004. estimate the local heat transfer coefficient at this point.the following property data for air are given: density = 0.88kg/m3 , viscosity 2.286 x 10 ^-5 kgm/s , k = 0.035w/mk ,cp = 1.001kj/kgk. use colburn reynolds analogy.

Answers: 1

Answer

You know the right answer?

Q1. A 3.phase full wave controlled rectifier is fed from 3-phase, 400V,50HZ source and is connected...

Questions