Draw & explain torque slip characteristics of permanent magnet synchronous motor.

What is the difference between a permanent magnet motor and a wound rotor motor?
Answer : The main difference between a **Permanent Magnet Motor (PMM)** and a **Wound Rotor Motor (WRM)** lies in how they produce the magnetic field needed for the motor to operate. ### 1 ... , which allows for more control over the motor's performance but comes with added complexity and maintenance needs....

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in Electrical Engineering

A 3 φ I.M. has synchronous speed of 250rpm and 4% slip at full load. The rotor has a resistance of 0.02Ω/ph and stand still reactance of 0.15Ω/ph. Calculate i) The speed at which max torque is developed. ii) The ratio of maximum to F. L. torque. iii) The ratio of maximum to starting torque.

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in Electrical Engineering

Draw and explain V and inverted V curves of synchronous motor.

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in Electrical Engineering

Draw and explain 'V' and 'inverted V curves' for synchronous motor.

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in Electrical Engineering

Draw & explain block diagram of Electric drives

Explain block diagram of Electric drives
Answer : ### Block Diagram of Electric Drive An electric drive system is a mechanism used to control the motion of electrical machines, such as motors, and is responsible for controlling the speed, ... drive system works and how each component interacts to provide accurate control over motor-driven systems....

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in Electrical Engineering

Derive the torque equation of 3 φ I.M. under running condition.k) Explain production of R.M.F. in 3-phase I.M. when 3 φ supply is fed to it. Draw its phasor diagram.

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in Electrical Engineering

Define slip and synchronous speed of 3 phase induction motor.

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in Electrical Engineering

Why there is no slip in synchronous motor?

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in Electrical Engineering

Draw a neat labelling V-I characteristics of SCR and explain the region.

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What are the characteristics of a synchronous motor?

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in Electrical Engineering

What is slip and torque?

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What is torque and slip?

What is torque and slip?
Answer : **Torque** and **slip** are terms commonly used in the context of electrical machines, particularly in motors. Let's break them down: ### 1. **Torque**: - **Torque** is a measure of ... , as too much slip can lead to reduced efficiency, while torque indicates how much load the motor can handle....

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in Electrical Engineering

Explain the characteristics of a DC shunt motor.

Explain the characteristics of a DC shunt motor.
Answer : A **DC shunt motor** is a type of direct current (DC) motor where the field windings (the parts that create the magnetic field) are connected in parallel (shunt) with the armature (the ... . However, it is less suited for applications that require high starting torque or very high-speed control....

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in Electrical Engineering

What is the significance of torque-speed characteristics?

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in Electrical Engineering

Execute the following program & specify the contents of Accumulator & status of PSW after execution. Also draw the format of PSW.

Execute the following program & specify the contents of Accumulator & status of PSW after execution. Also draw the format of PSW.
Answer : Please provide the program you'd like me to execute, and I will help determine the contents of the accumulator and the status of the Program Status Word (PSW) after its execution. Additionally, I'll draw the format of the PSW for you....

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in Electrical Engineering

Draw logic diagram of 4:1 multiplexer & give its truth table.

Draw logic diagram of 4:1 multiplexer & give its truth table.
Answer : ### Logic Diagram of a 4:1 Multiplexer A **4:1 Multiplexer** has 4 data inputs, 2 control (or selection) lines, and 1 output. The selection lines determine which of the 4 data inputs gets passed to the ... input **D3** is passed to the output. This is how the logic of a 4:1 multiplexer works!...

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in Electrical Engineering

Draw master-slave JK FF & write its truth table.

Draw master-slave JK FF & write its truth table.
Answer : A **Master-Slave JK Flip-Flop** is a combination of two JK flip-flops: one for the **Master** and one for the **Slave**. The Master flip-flop is triggered by the **clock ... changes occur in a synchronized manner, based on the clock signal, eliminating the possibility of glitches or race conditions....

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what is the difference between synchronous generator & asynchronous generator?

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What is the difference between synchronous generator & asynchronous generator?

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Define synchronous reactance & synchronous impedance.

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Define synchronous speed and slip speed.

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List different starting methods of three phase synchronous motor. Explain any one of them.

List different starting methods of three phase synchronous motor. Explain any one of them.
Answer : There are several methods to start a three-phase synchronous motor, and these methods are used to overcome the challenges of starting synchronous motors, as they require high starting torque. Some ... used because it allows the motor to start smoothly without the need for complex external equipment....

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in Electrical Engineering

Explain the effect of variable excitation on the behaviour of synchronous motor under constant load condition.

Explain the effect of variable excitation on the behaviour of synchronous motor under constant load condition.
Answer : The excitation in a synchronous motor refers to the direct current (DC) supplied to its field winding. This excitation determines the strength of the magnetic field produced by the rotor ... in optimizing the motor's performance, especially in power factor correction and reactive power management....

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in Electrical Engineering

Explain the working principle of a synchronous motor.

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in Electrical Engineering

Explain hunting and phase swinging in synchronous motor.

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Explain hunting in synchronous motor. State its causes and effects.

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in Electrical Engineering

Draw symbols and V-I characteristics of the following devices: LASCR DIAC PUT SCS.

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Draw I-V characteristics of power transistor. Show different regions.

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Draw the V-I characteristics of power transistor.

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in Electrical Drives and their Control

Explain time graded current graded & combined time current graded type overcurrent scheme

Explain time graded current graded & combined time current graded type
Answer : In electrical protection systems, overcurrent protection is essential to safeguard electrical circuits from excessive current that could cause damage or fire. Overcurrent relays are used to detect faults or overloads and ... . Let me know if you need more details or examples on any of these!...

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in Electrical Engineering

Explain full adder with its logic diagram & truth table.

Explain full adder with its logic diagram & truth table.
Answer : A **full adder** is a digital circuit used to add three binary digits (bits). It is called a "full" adder because, in addition to the two input bits, it also takes in a carry bit from a ... carries, and an OR gate to combine the carry terms. Let me know if you'd like any further explanation!...

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in Electrical Engineering

State & explain De-Morgan’s first theorem.

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What is DC motor & Types?

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What is the advantage of Slip Ring Induction Motor?

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Define Rotor frequency and slip of three phase induction motor.

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What is slip in motor?

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The power input to a 500V 50Hz 6Pole 3 phase induction motor running at 975 rpm is 40 kW. The stator losses are 1kW and friction and windage losses are 2kW. Calculate: (i) Slip (ii) Rotor copper loss (iii) Shaft power (iv) Efficiency

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in Electrical Engineering

Compare slip ring induction motor with squirrel cage induction motor on any four parameters.

Compare slip ring induction motor with squirrel cage induction motor on any four parameters.
Answer : Here's a comparison of **Slip Ring Induction Motor** and **Squirrel Cage Induction Motor** based on four important parameters: ### 1. **Rotor Construction** - **Slip Ring ... ** are simpler, more efficient, and require less maintenance, making them suitable for general-purpose applications....

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in Electrical Engineering

Compare slip ring induction motor with squirrel cage induction motor on any four points.

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What is slip in an induction motor?

What is slip in an induction motor?
Answer : Slip in an induction motor refers to the difference between the speed of the rotating magnetic field (synchronous speed) and the actual speed of the rotor. It is expressed as a percentage ... the motor is not running as efficiently and may indicate issues like overloads or mechanical problems....

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in Electrical Engineering

What is slip in a motor?

What is slip in a motor?
Answer : Slip in a motor, especially in an induction motor, refers to the difference between the speed of the rotating magnetic field (synchronous speed) and the actual speed of the rotor. In simpler terms, ... , slip is small (typically between 1% and 6%), but it can increase under heavy load conditions....

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in Electrical Engineering

What is a motor slip?

What is a motor slip?
Answer : Motor slip refers to the difference between the synchronous speed (the speed at which the magnetic field rotates) and the actual speed of the rotor in an induction motor. In an induction motor, the ... , and a lower slip means the motor is running close to its synchronous speed with minimal load....

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in Electrical Engineering

How does a slip ring work in an electric motor?

How does a slip ring work in an electric motor?
Answer : A slip ring in an electric motor is a key component that allows for continuous transfer of electrical power between a stationary part (the stator) and a rotating part (the rotor) ... a rotating electrical connection, maintaining a constant flow of electricity while the motor parts are moving....

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What is torque of a motor?

What is torque of a motor?
Answer : Torque of a motor is a measure of the rotational force that the motor generates to rotate an object, like a wheel or a fan. It's what makes the motor move or do useful work. In ... torque is related to the amount of current flowing through the motor; more current typically results in more torque....

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Draw & explain torque slip characteristics of permanent magnet synchronous motor.

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