Electronics Choke

7/30/2019 Electronics Choke

1/12

PRESENTED BY:

Sushree sangita dash

Electrical engg6th semistar

Regd-f1006602050

Group- 03


2/12

CONTENTS:

Introduction

Component list Circuit digram

Working principle of electronics choke

Advantages

Disadvantages

Application

Conclusions


3/12

INTRODUCTION:

A choke is one of the vital components of

flurocent lamp.It creats a high voltagestorage across the lamp electrodes duringstarting to indicate discharge through thelow pressure gaseous medium between theelectrodes. It also limits the current,

during normal operation after thedischarge have been established.inbeginning conventional coil wound chokewere in use but with the change intechnology this have been started replacing

with electronic chokes.this chokes save about35 to 40% of

energy as compared to conventional chokesgiving better luminescence.They can glowat lower voltage compared to conventional

coil wound choke


4/12

Component list


5/12


6/12


7/12

Working principle A choke is an inductors .inductor have many

applications : tuning,filtering etc.when used

for filtering particularly in power suppliesinductors are often referred to as chokes.

A choke in a power supply is placed in serieswith the line to add filtering.in the earlystage of power supply , say right after the

rectifiers, there will be a lot of ACcomponent riding on the DC

In operation ,as current increases,a chokeresists the change by storing the energy in amagnetic field;half a cycle later when the

current starts to drop,the chokes magneticfield beings to collapse and in doingso,dumps current back into the line ,thussmoothing it and reducing the ACcomponent


8/12

Chokes are more common in highvoltage/low current powersupplies.They were very commonlyused in vacuumtube equipment wherepower supplies had to deliver on the

order of 300 VDC. In todays lowvoltage/high current supplies,most ofthe filtering is accomplished witcapacitors.

Filter capacitors are placed across theline and will be large and expensive ifthey have to support high voltage.filterchokes are placed in series with the line

and get large and expensive if they haveto carry a lot of current.


9/12

Advantages Electronics choke increase lamp

efficency by keeping more vaporized inthe arc stream.

Electronics choke are smaller andlighter

Electronic choke cooler than magneticchoke


10/12

Disadvantages Electronics are more expensive than an

equivalent line frequency ballast

Electronics choke are less robustlyconstucted than line frequncy choke


11/12

CONCLUSION:

Hence we got a clear idea about CRO wealso got knowledge about workingpriciple of CRO

We also got knowledge that by using crowe can measure current,voltage,phasediffernce and frequncy.


12/12

THANK YOU

Documents

Electronics Choke