Rectifiers and inverters, Electrical Engineering

Assignment Help:

RECTIFIERS AND INVERTERS

Rectification is  the process of conversion of alternating input  voltage  to direct output voltages. Converters are controlled  rectifiers which  convert constant ac voltage  to variable  de output  voltage. Since  the diode rectifiers are  uncontrolled rectifier because it gives fixed  output  voltages  only  whereas in controlled  rectifiers thyristors are used are  used to  control  the output voltage of converter by varying  the delay or firing  angle. These are phase controlled rectifiers which  are simple  less expensive and highly efficient. These are  also called ac de converters and are used extensively in industrial applications for example steel  rolling mills paper mills pining presses textile mills traction system magnet  power suppliers Hvdc  transmission  variable  speed  drives portable hand  tool  drives  electro  chemical and electrometallurgical processes etc.

The reverse  process of rectification is  know as inversion. An inverter converts fixed de voltage  to a variable ac voltage and variable frequency. Ups  induction heading , HVDC power  transmission    variable  frequency drives electric  vehicle drives and air  conditioning  are some  of important application of  inverter. An power  when main power is not available. When main  power is  restored a  rectifier is uded to supply DC power  to a higher  to recharge the batteries. Inverters convert  low  frequency main AC power is first rectified to provide DC power. The  inverter then  changes the Dc  power to high frequency AC power. With ?HVDC  power  transmission  AC power is rectified and high  voltage DC power is transmitted  to another location. At the receiving location an inverter n a static inverter plant  converts the power back to AC. A variable frequency drive controls the  operating speed of an AC motor. a an  inverter provides the controlled power. Inmost  cases the variable frequency drive includes a rectifier so the DC power for the   inverter can be provided from main AC power. Since an inverter is the key  component variable frequency driver are sometime called  inverter drives of just inverter. Adjustable speed motor  control  inverters are currently used to power the  traction motor  in some  electric locomotives and diesel electric locomotives as well as some battery electric vehicles and hybrid electric highway  vehicles. An air conditioner bearing the  inverter tag  uses a variable frequency  drive  to control  the speed  of the motor  and thus  the compressor.

 

 


Related Discussions:- Rectifiers and inverters

Fibre optics, 1. A very narrow laser beam in air is shone into a sphere of ...

1. A very narrow laser beam in air is shone into a sphere of solid glass that has a uniform refractive index n>1 and radius ? . The beam makes an angle a in air with the normal to

Speed control of ac machine, what is meant by pole changing methods in ind...

what is meant by pole changing methods in induction motor

Zener breakdown, Zener breakdown: Zener Breakdown takes place in very ...

Zener breakdown: Zener Breakdown takes place in very thin junction i.e. when both sides of junction layer is narrow. When a small reverse bias voltage is applied a Very strong

Define the universal property of nand and nor gates, Define The universal p...

Define The universal property of NAND and NOR Gates? The NAND and NOR gates are called universal gates, because any gate can build by using these two gates. The univers

Explain cellular telephone systems, Q. Explain Cellular Telephone Systems? ...

Q. Explain Cellular Telephone Systems? Today radio-based systems make it possible for mobile people to communicate via cellular telephone systems while traveling on airplanes a

Explain stages of attending to rail fracture, Q. Explain stages of attendin...

Q. Explain stages of attending to Rail fracture? Various stages of attending to Rail fracture / weld failure in a L.W.R. track in field - Equipment required - i) Special

Outdoor termination for cables, Outdoor Termination for Cables - Measures f...

Outdoor Termination for Cables - Measures for Improving Connection Outdoor terminations for paper insulated or PILCA cables were generally used without much of a problem. With

add instruction, ADD Instruction This  instruction use to add  content...

ADD Instruction This  instruction use to add  contents of any  register or memory  location with the  contents of accumulator. There are two  formats for ADD  instruction to ad

Electrons, Ask question #Minimum 100 words accepted how does the charge pla...

Ask question #Minimum 100 words accepted how does the charge plate relate to the movement of electrons

Find the fourier series for the square wave, (a) Find the Fourier series fo...

(a) Find the Fourier series for the square wave shown in Figure(a). (b) Let a voltage source having the waveform of part (a) with a peak value of 100 V and a frequency of 10 Hz

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd