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# Electrical Engineering

Anais Greenfelder

Lvl 10
2021-10-09 18:35:21
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Cards in this guide (25)
What is the effecte of reactive power in generators

The effect of reactive power in generators allows the generator to maintain high voltage. Without the high voltage, the generator will be faulty or will stop working.

What in slip speed control

slip speed control refers to induction machines

s=(synchronous speed-motor speed)/synchronous speed

by varying slip the machine can be either be operate in generated mode or motor mode

How do you polarize a 12 volt generator on 1968 VW
1. Remove the fan belt.
2. Connect a jumper from generator DF to the frame (or generator D- pole, if it exists).
3. Pick up battery plus with a jumper cable and touch the generator D+ pole - the generator should start spinning. Do this only for a few seconds to avoid overheating. The generator is polarized now.
The complexity of the American federal system encourages what

The complexity of the American federal system encourages separation of power among the three arms of government. It also encourages the sharing of power between the central government and the states.

Difference between induction and synchronous motor

In induction motors no seprate source is required to start the motor,and motor itself induces emf as the word induction clearly reflects it starting principle while in case of synchronous motors ,motor is synchronised with an external source of emf.

What is synchronus capacitor

A Synchronous Capacitor is a synchronous motor run at no load and is under excited. It is there purely to correct the power factor. It will act as a source of reactive power to your system.

Difference between synchronous generator and synchronous motor

The main difference between synchronous generators and synchronous motors is that a synchronous generator supplies power. Otherwise, it would be just like a synchronous motor.

Why is a synchronous speed motor considered a constant speed motor

synchronous motor is a constant speed motor because it will only run at a synchronous speed or not at all.the speed can be changed by changiing the frequency only ns=120f/p

What factors determine the synchronous speed of an AC motor

effect of synchronous speed

What is the difference between parallel and distrtibuted opering system

parallel operating system is tha sharing of data between two computers.......

Distributing system is the sharing of data among different computers....

What is a generator bus

A generator bus is the bus that connects the generator to it's generating transformer.

Why must the oncoming generator on a power system be parralleled at a higher frequency than that of the running system

If the frequency of the oncoming generator is slightly higher than the system frequency, the phase angle between the system and generator voltages will slowly change at a frequency equal to the difference between system and generator frequencies.

What is synchronous machein

mainly alternator,synchronous motor comes under the synchronous machine.a synchronous motor is not a self starting motor.if a synchronous motor moves with more than synchronous speed then it acts as a synchronous generator.

What is starting torque

The torque which is produced during the starting of motor is simply called as starting torque.

What classes are offered in the california design college

"There are many classes offered in the california design college. Environmental design classes, art, painting, scultping and drama classes. Many different forms of design are availible."

When you should use synchronous motor instead of capacitor for power factor correction

We shall use Synchronous machines where inductive loads are more. Due to Inductive loads power consumption will be more due to leading power factor. To compensate this we shall use synchronous motor to improve the power factor.

Shiva Kumar.N

MBNR,AP

What is mean by load frequency control

Power sharing between two areas occurs through these tie-lines. Load frequency control, as the name signifies, regulates the power flow between different areas while holding the frequency constant.

How does an induction motor develop torque

The shaft of an AC induction motor rotates because of the torque created by the interaction between the magnetic field of the stator and the magnetic field of the rotor.

Are speed and distance directly proportional or inversely proportional

Directly proportional. Greater speed - greater distance.

Why it is impossible for an induction motor to operate at synchronous speed

The motor generates torque dependent upon the slip frequency (the lag between running speed and synchronous speed). Since the motor is not lossless, it takes some amount of slip to create the minimum amount of torque required to get the motor to turn.

What is double cage rotor and deep bar cage rotor

deep bars in the rotor that result in higher rotor resistance at low speeds thus resulting in larger starting torques. The higher resistance is due to the skin effect.

How armature resistance can be determined in a synchronous generator

dc generators and motors have armatures

synchronous motors or generators have a permanent or dc magnet in the rotor

What is the speed regulation of a synchronous motor

A synchronous motor aways runs at the synchronous speed, which is the supply frequency divided by the number of pairs of poles in the motor.

For a 4-pole motor the speed is 1500 rpm (50 Hz supply) or 1800 rpm (60 Hz supply).

The mechanical phase of the rotor is liable to be a little unstable under changing load conditions.

What is the inter lock used for main power supply and generator supply

The interlock is used to prevent the service supply and the generator supply from being inadvertently paralleled to each other.

What is an amortisseur winding

An amortisseur winding is a squirrel cage winding placed near the surface of the pole faces of a synchronous motor.

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