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

assembly language program , Write an Assembly language program that will p...

Write an Assembly language program that will produce a PWM signal with a desired average voltage. The user selects the desired average voltage by pressing keys 1 - 4. If the

Stax store accumulator indirect instruction , STAX Store  Accumulator  In...

STAX Store  Accumulator  Indirect Instruction This  instruction is used to  copy data from accumulator to the memory  location pointed by register pair ( only  BC or DE pair).

The electrical circuit sign convention, The Electrical Circuit sign convent...

The Electrical Circuit sign convention Notice that current leaves a source at its high potential (positive) terminal but enters a load at its high potential (positive) ter

Determine the rated stator current, A three-phase, wye-connected, 2300-V, f...

A three-phase, wye-connected, 2300-V, four pole, 1000-kVA, 60-Hz synchronous machine has a synchronous reactanceXs = 5, a field resistance Rf = 10, and an approximately linear ma

Explain the architecture of ss7, Q. explain the architecture of SS7 and com...

Q. explain the architecture of SS7 and compare with seven-layer OSI architecture. Ans: A block schematic diagram of CCITT no. 7 signalling system is displayed in figure. Sig

The basic operation of battery, The basic operation of battery  A simpl...

The basic operation of battery  A simple cell comprises two dissimilar conductors (electrodes) in an electrolyte. Such a cell comprises copper and zinc electrodes. An electric

Ac generators - the alternator, In practice, it is usually better to wind t...

In practice, it is usually better to wind the field coils on the rotor and supply the field current to them via slip rings.  As the rotor turns, the changing magnetic field expe

Working of microprocessor control, Q. Working of Microprocessor Control? ...

Q. Working of Microprocessor Control? The microprocessor, which has rapidly become a key component in digital control systems, and its associated circuits function as the digit

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

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