Why capacitors are used in 1 phase induction motors?

SONY RANJAN MAHAPATRA

• Jun 25th, 2013

Basically function of capacitor is to improve the power factor and make the single phase motor self start having made split phase between both the winding(starting & running winding)

shaik sharif

• Jun 5th, 2013

In generally capacitors are playing main role in electrical system.And also power factor improvement done by capacitors so therefore capacitors mainly using for increase the starting torque of the motor.

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A.Rajasekharreddy

• Sep 13th, 2016

Brush less alternator is nothing but stationary armature, Brush alternator is a rotating armature.

Shan

• Aug 24th, 2016

Is there a exciting stator in brushed generator? If not what is the reason?

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What is the difference between earthing and grounding
When should I use any of both? Thanks

boe

• Aug 8th, 2013

Ground and earth is basically the same thing. Its all about providing the least path of resistance to the earth mass. Neutral is connecting the star point of three phase equipment out which serves as a return path for the flow of electricity.

jayashree priyadarsini

• Aug 4th, 2013

1.grounding means connecting the live parts of the equipment to the earth where as earthing means connecting the dead parts of the equipment to the earth. 2.grounding provides return path for the f...

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vishnu sharma

• Nov 27th, 2014

Catch the wire from both hands at a time in air, then potential difference is zero, so that current does not flow in body.

Santanu

• Jul 10th, 2013

There is no risk of any shock as the whole body is at same potential. However, if the persons body touches ground or for that matter, anything which may create a potential difference, there will be el...

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Can we measure reactive power by using only a single wattmeter? If Yes, How?

vki

• Sep 7th, 2017

We can measure by connecting potential coils of two wattmeters between two phases

Vamsi Krishna

• Feb 15th, 2017

Why single wattmeter is enough to measure 3 phase reactive power? Explain it elaborately.

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In a three phase system three wires are of colour red, yellow and blue are used to discriminate each phase. Now how will you identify each phase wire without knowing the colour and without any pre information?

Soumya Ranjan Nayak

• Dec 28th, 2017

Go for continuity test from source end & at testing end test in discharge condition.

WALT SLADE

• Nov 22nd, 2017

The neutral is often at the very top of a pole or it could be below the three hot phases. If all the wires are side by side, it sometimes uses a smaller insulator because theres very little voltage on...

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How we can change the direction of rotation of Induction motor?

vidya

• Nov 13th, 2017

What if all 3 phases are interchanged between 3 of them?

atul sudhakar

• May 2nd, 2014

By interchanging the two terminals keeping the third one fixed (fix R terminal and interchange Y and B)

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What is the difference between phase and neutral?

sarita

• Nov 16th, 2014

Phase contain supply voltage i.e heavy electrons or protons and neutral contain no supply voltage and neutral charges.

saadsms

 Profile Answers by saadsms Questions by saadsms

• Oct 26th, 2014

1- in one phase case : Phase is supply voltage weather neutral is returning path the same current for that supply voltage. 2- in three phase case : - in balanced load current returned to earth = 0 - ...

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Why ceiling fan rotates in anticlockwise direction?

P.Raghavan

• Jun 13th, 2017

When fan stops suddenly and starts running in clockwise what is it due to?

amardeep singh

• Jul 30th, 2011

Flux is produce in clockwise direction and eddy currents makes fan to rotate in anticlockwise direction..........

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tanweer salim

• Nov 21st, 2013

Ups uninterruptible power supply

nazmul haque

• Jul 16th, 2011

Uninterrupted Power Supply...............

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saginala13

 Profile Answers by saginala13 Questions by saginala13

• Jun 19th, 2010

Hey SCR means Silicon Conrolled Rectifier.........it is used in powersystem applications.

Mohamed saad

 Profile Answers by Mohamed saad Questions by Mohamed saad

• Apr 29th, 2008

in another way of diffenationsthe thyristor can be diffened as a valve controlling flow ( current) to have this flow we have to open this valve ( by the gate pulse) the flow will be continous unless the flow is enough

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What is the diffrence between Altrnator & Generator? Outline its working principal.

satyaprakash sahu

• Apr 12th, 2015

As the main difference between alternator and generator is that field winding(poles) in a generator are present in stator i.e is fixed and armature winding is rotating whereas in a alternator the pole...

nimmala rakesh

• Mar 28th, 2012

Alternators and generators are the two devices which generates electricity.. the function of these are same but the construction of it is different. in alternators the armature is stationary and the m...

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Why the transmitted voltage is multiple of 11 like 11, 22, 33, 132 etc? Is their any technical reason for that?

NIMMALA RAKESH

• Mar 28th, 2012

The transmission voltages will be the multiples of 11 i.e. 11kv, 22kv, 33kv,etc., because from the transformer equation we have 4.44*f*n*phi where f is the frequency of ac input , n is the no. of tur...

veeru

• Mar 27th, 2012

The form factor of ac wave form is 1.1 so the voltage is multiple of this

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Why the transformer neutral point connected to earth?

GARGI VERMA

• Jul 30th, 2015

In Simple words, There are two type of losses in a transformer; 1. Copper Losses 2. Iron Losses or Core Losses or Insulation Losses Copper losses ( I2R)depends on Current which passing through tran...

Ayaz Shaik

• Jun 30th, 2015

It does not mean always the t/f neutral is connected to ground..only in case of power t/f it happens mainly for two reasons 1) We know all things like harmonics, fault occurrence, lightning, over cur...

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chanchal

• Jun 5th, 2016

Earthing is inside of earth with any conductive material and grounding is on top of the earth for machines (grounding can be with high ohms but earthing must be with 0.1 ohms)

harsha vardhan

• May 2nd, 2016

In my case both are similar

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mani babu amballa

• Mar 5th, 2016

When the charging coil is disturbed suddenly, it will produce large amount of voltage

shubham

• Aug 31st, 2015

Choke work like transformer and its major components which is connected Across its inductor Stores current like caps

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What is the role of air gap in any electrical machine how does it affects induce emf??

A.Rajasekharreddy

• Sep 13th, 2016

Air gap is used to produce magnetic flux between stator and rotor. Air gap is more uniform for the production of sinusoidal EMF in alternators to eliminate the harmonics. Air gap is more in syn machin...

NITIN

• Aug 10th, 2016

Airgap is used to produce magnetic field between stator and rotor. Flux is produce in rotor winding, then torque develop and rotor is rotating, but if air gap is more between stator and rotor then more magnetizing current is required and also loss is more.

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As all we know,induction stove works on the principle of electromagnetic induction.Thus an emf is induced in the vessel and eddy current flows through the vessel.Since the vessel is made of ferromagnetic material (high resistivity) larger amount of heat (H=I^2 R)is generated.What will happen if a human body comes into contact with this high resistive vessel??? Won't the human body resistance be parallel...

SGhosh

• May 15th, 2012

Human body under dry condition has much higher resistivity compared ferromagnetic material.

mahmoudp1

 Profile Answers by mahmoudp1 Questions by mahmoudp1

• May 5th, 2012

Ferromagnetic material is higher

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atul sudhakar

• May 2nd, 2014

Increased frequency causes increased losses and we yet don't have the technology to have the strong foundation to keep machine running at that high frequency

ripplenwinder

 Profile Answers by ripplenwinder Questions by ripplenwinder

• Dec 10th, 2013

In power transmission it cant due to EFIENCY and COST. The higher the frequency the more it is essentialy a direct current! so 100HZ has more power loss due increased current lower peak voltages at th...

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What is the difference between a capacitor and a condensor?

ripplenwinder

 Profile Answers by ripplenwinder Questions by ripplenwinder

• Dec 11th, 2013

There is no difference with the exception or semantics and argument. Tesla use to call a capacitor a condenser we now call a condenser a capacitor. Schematics symbol for both are the same!

Pruthvi

• Oct 21st, 2013

Main diff. b/w Condensers and capacitors are
i. Condensers are rotating while capacitors are static
ii.Smooth flow in KVAR can be obtained through condensers while it cannot be obtained through switching capacitor banks.

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