# Explain the sinusoidal harmonic reduction techniques for cylcoconverters.

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Explain the sinusoidal harmonic reduction techniques for cylcoconverters.

sinusoidal

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Description : To get minimum harmonic distortion in the output, a 3-Ф to 3-Ф cyclo-converter requires :  (A) 12 SCRs (B) 18 SCRs (C) 36 SCRs (D) 72 SCRs

Last Answer : To get minimum harmonic distortion in the output, a 3-Ф to 3-Ф cyclo-converter requires : 36 SCRs

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Description : Explain how sinusoidal AC voltage is generated by using simple one loop generator.

Last Answer : An electric current produced by means of electrical machine is known as generator which converts mechanical energy into electrical energy. When conductor cuts the magnetic flux, emf induced in it. (Faraday' ... upon position of armature. The nature of emf is alternating as shown by the waveform.

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Last Answer : Sinusoidal Steady-State Analysis - nodal analysis super node problem solution 2

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Description : Sinusoidal Steady-State Analysis - nodal analysis super node problem solution

Last Answer : Sinusoidal Steady-State Analysis - nodal analysis super node problem solution

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Last Answer : Sinusoidal Steady-State Analysis - Using nodal analysis, find node voltages in the circuit.

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Description : An ac voltmeter using full -wave rectification and having a sinusoidal input has an ac sensitivity equal to  (1) 1.414 times dc sensitivity (2) dc sensitivity (3) 0.9 times dc sensitivity (4) 0.707 times dc sensitivity

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Description : When the phase difference between two sinusoidal quantities is 90° they are said to be ______ A) Phase right angle B) Phase quadrature C) Phase sinuright D) None of these

Last Answer : When the phase difference between two sinusoidal quantities is 90° they are said to be Phase quadrature

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Description : The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of______degrees.

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Description : A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave?

Last Answer : A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave will be of 5 Hz.

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Description : The second harmonic distortion is defined as the A) Ratio of amplitude of second harmonic component in the output to that of the fundamental frequency B) Harmonic distortion due to only second harmonic component C) Sum of distortion of first and second harmonic components in the output

Last Answer : The second harmonic distortion is defined as the Ratio of amplitude of second harmonic component in the output to that of the fundamental frequency

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Description : The time period of third harmonic of power supply frequency, in milliseconds, is (A) 20 (B) 3.33 (C) 6.66 (D) 60

Last Answer : The time period of third harmonic of power supply frequency, in milliseconds, is 6.66

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Description : The fractional-pitch used for eliminating 7th harmonic from the emf wave of an alternator is (A) 2/3 (B) 5/6 (C) 7/8 (D) 6/7

Last Answer : The fractional-pitch used for eliminating 7th harmonic from the emf wave of an alternator is 6/7

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Description : What is the harmonic filter?

Last Answer : It is being used to supress the input voltage distortion at input side of any electrical equipment. This distortion is created by other electrical loads like motor, drives etc nearby connected with ... for a range of harmonics or specific harmonics like 3rd harmonics  5th harmonics, 7th harmonics.

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Description : What is harmonic in power quality?

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Description : Explain the “mitigation of power theft” and “faulty meter replacement” for energy conservation techniques to reduce commercial losses.

Last Answer : Energy conservation techniques to reduce commercial losses:  1. Mitigation of Power Theft: Power theft being the most important issue which all of the service providing utilities ... agricultural sector. Prepaid meters may prove effective measures against unauthorized abstraction of energy.

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Description : Explain any two energy conservation techniques in fan.

Last Answer : Following are energy conservation techniques in Fans : 1) Use the electronic regulators instead of conventional regulator: Function of regulator is to control the speed of the fan. The conventional regulators ... 't forget to properly maintain your electric fan and keep it in good working order.

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Description : Explain frequency domain synthesis. Which techniques fall into the category of frequency domain synthesis?

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Description : Resume Techniques for Getting Noticed

Last Answer : Resume Writing Techniques Imagine that you are applying for a job. An employer gets hundreds of resumes for that position (this is not uncommon for today's job market). Your potential ... from the position advertisement to prove that you are exactly the person the employer wants to hire.

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Description : 32 With S2 closed and S1 open, the current waveform in the delta winding will be [GATE 2009] A. a sinusoidal at fundamental frequency B. flat-topped with third harmonic C. only third-harmonic D. none of these

Last Answer : C. Only third harmonic

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Description :  With both S1 and S2 open, the core flux waveform will be [GATE 2009] A. a sinusoidal at fundamental frequency B. flat-topped with third harmonic C. peaky with third-harmonic D. none of these

Last Answer : B. Flat topped with third harmonic

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Description : In single pulse modulation of PWM inverters, third harmonic can be eliminated if pulse width is equal to   (a) 30o (b) 60o (c) 120o (d) 150o

Last Answer : In single pulse modulation of PWM inverters, third harmonic can be eliminated if pulse width is equal to 120o

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Description : What are the methods of reduction of harmonic content?

Last Answer : a. Transformer connections b. Sinusoidal PWM c. Multiple commutation in each cycle d. Stepped wave inverters

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Description : State the need for reduction of harmonics in inverters. Enlist the various methods for reduction of harmonics in inverter output.

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Description : The differential equation, corresponding to sinusoidal waves, represented by y = a sin(ωt - kx) has the form $$\frac{\partial ^2y}{\partial x^2}=\frac{1}{v^2}\frac{\partial ^2 y}{ ... from above (4) can represent a sinusoidal wave; its differential equation form would also be the same as above 0 answers 0 views Description : A sinusoidal A.C. voltage source, of adjustable frequency, is connected across a series LCR' combination. The inductance (L) and the capacitance (C), present in the circuit, can be expresssed in terms of the quality factor (Q) the ... \(L=\frac{1}{ω_0Q^2R^2}$$ and $$C = (\frac{Q^2R^2}{ω_0})$$

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Description : A sinusoidal carrier voltage of frequency 1.5 MHz and amplitude 50 volt is amplitude modulated by sinusoidal voltage of frequency 10 KHz producing 50% modulation. Calculate the frequency of upper and lower sidebands.

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Description : A carrier wave, c (t), given by c(t) = [12 sin (4π x 106t)] is amplitude modulated by a given sinusoidal volts message signal. The resultant (AM) carrier wave has a modulation index of 75% and a bandwidth that is 2% of the ... = [9 sin (8π x 104 t)] volt (4) on (t) = [16 sin (8π x 104 t)] volt

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Description : A (sinusoidal) carrier wave C(t) = AC sin ωc t is amplitude modulated by a (sinusoidal) message signal m(t) = Am sin ωm t Write the equation of the (amplitude) modulated signal. Use this equation to obtain the values of the frequencies of all the sinusoidal waves present in the modulated signal.

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Description : The sinusoidal wave y(x,t) = ym sin(kx-omegat) is incident on the fixed end of a string at x = L. The reflected wave is given by :-

Last Answer : The sinusoidal wave y(x,t) = ym sin(kx-omegat) is incident on the fixed end of a string at x = L ... (kx+omegat-kL) D. y_(m)sin(kx+omegat-2kL)`

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Description : What are the features for Human Hepatic Sinusoidal Endothelial Cells?

Last Answer : HHSEC are isolated from human liver. HHSEC are cryopreserved immediately after purification and delivered frozen. Each vial contains >5 x 10^5 cells in 1 ml volume. HHSEC are characterized by immunofluorescent ... ). HHSEC are negative for HIV-1, HBV, HCV, mycoplasma, bacteria, yeast and fungi.

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Description : Current flowing in only one direction is called ___________. A. alternating current B. omnidirectional current C. direct current D. sinusoidal current

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Description : Which of the wave shapes shown in the illustration is termed a sinusoidal wave? EL-0088 A. A B. B C. C D. D

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Description : Ammeters and voltmeters used in sinusoidal AC power systems indicate which of the following values of the waveforms measured? A. Peak value B. Root-mean-square value C. Average value D. Maximum value

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Description : The sinusoidal carrier is pulsed so that one of the binary states is represented by a carrier while the other is represented by its absence. A. FSK B. ASK C. PSK D. QAM

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Description : If the mean stress value for a sinusoidal stress function is zero, then this type of stress falls in which category? a) Fluctuating Stresses b) Alternating Stresses c) Repeated Stresses d) Reversed Stresses

Last Answer : d) Reversed Stresses

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Description : Average power dissipated in resistor if sinusoidal p.d of peak value 25 V is connected across a 20 Ω resistor is A. 15.6 W B. 15 W C. 16 W D. 17 W

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Description : The first critical speed of an automobile running on a sinusoidal road is calculated by (modeling it as a single degree of freedom system) A Resonance B Approximation C Superposition D Rayleigh quotient

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Description : The first critical speed of an automobile running on a sinusoidal road is calculated by (modeling it as a single degree of freedom system) a) Resonance b) Approximation c) Superposition d) Rayleigh quotient

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Description : Q-7 during welding process, why sinusoidal wave form is converted in to the square wave form?

Last Answer : In sinusoidal wave, we get maximum energy at one point only. So for the more amount of maximum energy we can get by converting the sinusoidal wave form in to the square wave form, and more penetration and deposition rate is achieved due to maximum energy.

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Description : The output waveform produced due to time base generator in a CRO is a) saw tooth b) sinusoidal c) linear d) helical

Last Answer : a) saw tooth

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Description : The current drawn by the line due to corona losses is (a) non-sinusoidal (b) sinusoidal (c) triangular (d) square

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Description : Describe the operation of inductor with sinusoidal AC voltage as input. Draw waveform for voltage across and current through the inductor. Draw its phasor representation.

Last Answer : An alternating voltage is applied to a purely inductive coil, a back e.m.f. is produced due to self-inductance of the coil. The back e.m.f. at every step, opposes the rise of fall of current through the coil ... drop, the applied voltage has to overcome this self induced e.m.f. only.

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Description : Define Amplitude and Phase of Sinusoidal quantity.

Last Answer : Amplitudes are expressed either as instantaneous values or mostly as peak values.  Amplitude is the fluctuation or displacement of a wave from its mean value.  Phase is the position of a ... .  Phase an expression of relative displacement between or among waves having the same frequency .

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Description : Draw sinusoidal waveform of 3 phase emf and indicate the phase sequence.

Last Answer : Phase sequence is R-Y-B.

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Description : Two sinusoidal signals having the same amplitude and frequency are applied to the X and Y inputs of a CRO. The observed Lissajous figure is straight line. The phase shift between the two signals would be (1) Zero (2) 90 degrees (3) Either zero or 180 degrees (4) Either 90 degrees or 270 degrees

Last Answer : Two sinusoidal signals having the same amplitude and frequency are applied to the X and Y inputs of a CRO. The observed Lissajous figure is straight line. The phase shift between the two signals would be (1) Zero (2) 90 degrees (3) Either zero or 180 degrees (4) Either 90 degrees or 270 degrees

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Description : The rms value of the current in a wire which carries a d.c. current of 10 A and a sinusoidal alternating current of peak value 20 A is  (A) 10 A (B) 14.14 A (C) 15 A (D) 17.32 A

Last Answer : The rms value of the current in a wire which carries a d.c. current of 10 A and a sinusoidal alternating current of peak value 20 A is 17.32 A