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What is the need for electrically isolated drive circuits?

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Description : Explain transformer isolated drive circuits providing both signal and power.

Answer : EPROM EEPROM Flash EPROM Normalize cell size is 1. Normalize cell size is about 1 ... and floating gate, which is insulated by a dielectric material. NAND flash memory and NOR flash memory are the two types of flash memory.

Description : What are the fundamental requirements of gate drive ICs?

Description : Explain MOSFET gate drive circuit and totem pole configuration.

Answer : MOSFET gate drive circuit: The turning on and turning off of MOSFET can be controlled from gate to source voltage signal. If the gate to source voltage of MOSFET exceeds threshold ... this configuration, the two switches (transistors) are used in totem pole arrangement with a comparator.

Description : Explain open emitter BJT drive circuit.

Answer : open emitter BJT drive circuit:

Description : Explain DC coupled drive circuit with unipolar output.

Answer : DC coupled drive circuit with unipolar output: The figure shows the circuit and waveforms

Description : Explain thyristor gate drive circuit.

Answer : Thyristor Gate Drive Circuit: The thyristor can be turned on by pulse voltage signal at gate terminal and it does not require continuous drive signal like the transistor. The gate ... circuit provide required minimum gate voltage and gate current then the thyristor conducts properly.

Description : basic gate drive circuit of GTO

Answer : basic gate drive circuit of GTO

Description : What is the need of polarity marking in polyphase AC circuits?

Answer : Need of Polarity Marking in Polyphase AC Circuits: i) Polarity marking of terminals provides reference polarity for better understanding of system, even if the polarity of ac voltage changes ... of current transformers in relay protection circuit and getting desired performance is very difficult.

Description : Explain different gate drives techniques with base circuits and key features.

Answer : For constant torque drive armature voltage control speed control method is preferred.

Description : What is the difference between AC and DC drive?

Answer : AC means alternating current It's Frequency is 50hz Dc means direct current ItsI Frequency is 0Hz

Description : What is an electric motor drive?

Answer : An electric drive is a complex electromechanical system that drives various actuators in industrial and industrial work machines. In this case, control is carried out using a technological process ... calculation of the kinematic and load characteristics of the electric drive is carried out.

Description : What is a drive in electrical controls?

Description : What does an electric drive do?

Description : Adjustable-speed drive

Answer : .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

Description : In an adjustable speed ac drive which quantity gets reduced above rated speed ? (A) developed torque (B) stator frequency (C) reduced starting torque (D) stator current

Answer : In an adjustable speed ac drive which quantity gets reduced above rated speed ? (A) developed torque (B) stator frequency (C) reduced starting torque (D) stator current

Description : The synchronous motor which works on leading power factor and does not drive any mechanical load is called?

Answer : The synchronous motor which works on leading power factor and does not drive any mechanical load is called synchronous condenser.

Description : Can a power surge erase a hard drive?

Description : Scherbius Drive System

Answer : Scherbius Drive System

Description : Kramer Drive System

Answer : Kramer Drive System Kramer drive is a rotor side speed control drive of induction motor. Slip is the difference between synchronous speed and rotor speed. It is the ... and DC motor. The static Kramer drive is costlier because of the cost of DC motor.

Description : Advantages of Variable Frequency Drive (VFD)

Answer : Advantages of Variable Frequency Drive (VFD)

Description : Explain the concept of initial and final conditions in switching circuits for elements R and L. 

Answer : Concept of Initial and final condition in switching circuits for R:  Consider a resistor is connected to a voltage source, using a switch as shown in fig below The switch is closed ... of value Io in parallel with short circuit.(I0 is the current in inductor just before switching)

Description : Which capacitors are suitable for DC filter circuits?

Answer : Electrolytic capacitors are suitable for DC filter circuits.

Description : Is it possible to apply superposition theorem to nonlinear circuit? If yes, why? and if no, why? Explain

Description : Why is it necessary to keep air gaps in magnetic circuits as small as possible?

Description : Explain with neat diagram series and parallel magnetic circuits. 

Answer : Series magnetic circuit: When different magnetic materials having different lengths, cross sectional areas and permeability are connected one after another, in which same flux is established in different sections, then it is called series ... flux, Φ = Φ1 + Φ2  Path 1: BAFE  Path 2: BACD

Description : Series Magnetic Circuits

Description : Compare Asynchronous sequential and synchronous sequential circuits.

Answer : SR. NO. ASYNCHRONOUS SEQUENTIAL CIRCUIT SYNCHRONOUS SEQUENTIAL CIRCUITS. 1 Output can be changed at any instant of time by changing the input Output changes at discrete ... the counter change state simultaneously. This is because all the flip-flops are clocked simultaneously.

Description : Series rc circuits

Answer : Series rc circuits

Description : Circuits with XL Alone

Answer : Circuits with XL Alone X L values in series let two inductive reactances X L 1 and X L 2 are connected in series and has value 50 ohm and 50 ohm respectively. 100 volts A C ... phasor. And it is taken horizontal. Phase angle between inductive current and voltage is same 90 degree.

Description : AC Circuits with Resistance but No Reactance

Answer : AC Circuits with Resistance but No Reactance AC Circuits with Resistance but No Reactance Series resistances let two resistances R 1 and R 2 are connected in series as shows in figure and there ... voltage. Voltage V A is common to both the branch hence voltage V A is common reference.

Description : Nodal Analysis of Electric Circuits Example

Answer : Nodal Analysis of Electric Circuits Example 1 : https://youtu.be/XLS6kDQuHj0 Nodal Analysis of Electric Circuits Example 2 : https://youtu.be/OFhurvl74bA Nodal Analysis of Electric Circuits ... youtu.be/GmOozdjTVtM Nodal Analysis of Electric Circuits Example 9 : https://youtu.be/KjgfjJ7Ubb8

Description : State superposition theorem applied to D.C. circuits.

Answer : Superposition Theorem applied to D.C. circuits: Superposition theorem states that in any linear, bilateral, multisource network, the response (voltage across any element or current through any ... each source acting alone, while the other sources are replaced by their internal resistances.

Description : State two advantages of digital circuits.

Answer : Advantages of Digital Circuits: i) Digital circuits are easier to design. ii) Information storage is easy. iii) Accuracy and precision are greater. iv) Less affected by noise. v) Reliability is more

Description : Which of the following circuits converts any arbitrary waveform into square waveform? A) Hartley oscillator B) Schmitt trigger C) Differentiator D) RC phase shift oscillator 

Answer : Which of the following circuits converts any arbitrary waveform into square waveform? A) Hartley oscillator B) Schmitt trigger C) Differentiator D) RC phase shift oscillator 

Description : Which of the following is true at resonance in LC circuits? A) The series impedance of the two elements is at a maximum and the parallel impedance is at minimum B) The series impedance of the ... D) The series impedance of the two elements is at a minimum and the parallel impedance is at maximum

Answer : Which of the following is true at resonance in LC circuits? A) The series impedance of the two elements is at a maximum and the parallel impedance is at minimum B) The series impedance of ... D) The series impedance of the two elements is at a minimum and the parallel impedance is at maximum

Description : Asynchronous circuits are usually faster than synchronous circuits because

Answer : Asynchronous circuits are usually faster than synchronous circuits because they are free running and do not depend on the frequency of the clock

Description : An air gap is usually inserted in magnetic circuits to?

Answer : An air gap is usually inserted in magnetic circuits to prevent saturation.

Description : In AC. circuits, laminated iron is invariably used in order to?

Answer : In AC. circuits, laminated iron is invariably used in order to reduce eddy current loss.

Description : Find the Norton equivalent resistance for the network shown in Fig No. 2

Answer : Solution: To find Norton’s equivalent resistance removing voltage source and current source. Voltage source is replaced by short circuit and current source is replaced by open circuit so, we get circuit as

Description : Derive an expression for delta to star transformation. 

Answer : For delta network the resistance between the terminals 1 and 2 consists of R12 in parallel with  (R23+R31) Hence ,the resistance between the terminals 1 and 2 is In case of star network the ... equation( ii) from( i),we get Adding equations (iii) and( iv),we have 

Description : Derive an expression for resonant frequency of series RLC circuit.

Answer : At resonance frequency in RLC series circuit, we have inductive reactance is equal to capacitive reactance i.e.  Where fr is the resonant frequency in RLC series circuit. 

Description : For R-C series circuit draw (i) Circuit diagram (ii) Vector diagram (iii) Waveform of voltage and current

Answer : i) Circuit diagram ii)Vector diagram iii)Waveform of voltage and current

Description : State condition for resonance in R-L-C series circuit.

Answer : The condition for resonance in R-L-C series circuit. i) Inductive Reactance should be equal to capacitive reactance. That is XL = XC ii) The power factor of the circuit is Cos ɸ = 1 iii)The voltage and ... and given by I =V/R. v)Impedance of the circuit is minimum and given by Z =R.

Description : Use mesh analysis to calculate ammeter current in Fig No. 1

Answer : Solution:

Description : An a.c series circuit has resistance of 10ohm, inductance of 0.1H and capacitance of 10µf, voltage applied to circuit is 200V. find (i) Resonant frequency (ii) Current at resonance (iii) Power at resonance 

Answer : Solution: For RLC series circuit

Description : Two unpedauces given by Z1 = 10 + j5 and Z2 = 8 + j9 are joined in parallel and connected across a voltage of V = 200 + j0. Calculate the circuit current and branch currents. Draw the vector diagram.

Answer : Solution: Given, Z1=10+j5, Z2=8+j9, V=200+j0

Description : A series combination of resistance 100 ohm and capacitance 50µf is connected in series to a 230 V, 50HZ supply. Calculate (i) Capacitive reactance (ii) Current (iii) Power factor (iv) Power consumed 

Answer : For RC series circuit

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