• Home
  • Courses
  • Machines
    • Transformer
    • AC Motors
      • Induction Motor
      • Synchronous Motor
    • DC Motor
    • DC Generator
  • Power System
    • Circuit Breaker
    • Switchgear
    • Substation
    • Control System
    • Measurement
  • Electronics
  • Blog
  • Contact
    • Contact Us
    • Privacy Policy
Have any question?
[email protected]
Login
StudyElectrical.Com
  • Home
  • Courses
  • Machines
    • Transformer
    • AC Motors
      • Induction Motor
      • Synchronous Motor
    • DC Motor
    • DC Generator
  • Power System
    • Circuit Breaker
    • Switchgear
    • Substation
    • Control System
    • Measurement
  • Electronics
  • Blog
  • Contact
    • Contact Us
    • Privacy Policy

    Transformer

    Rectifier Transformer – Working Principle and Application

    • Categories Transformer, Power System, Substation
    Rectifier Transformers

    Table of Contents

    • What is the Rectifier Transformer?
      • Where Rectifier Transformers are Used?
      • Operation of Rectifier Transformers
      • Related Articles

    What is the Rectifier Transformer?

    Rectifier transformers are different from normal power and distribution transformers because they are special transformers made for industrial application. A Rectifier transformer is a special application transformer which includes diodes and thyristors in the same tank. 

    Power electronic circuits that convert alternating current (ac) to direct current (dc) is called rectifier circuits. Similarly, the circuits which can convert direct current to alternating current are called inverter circuits. Both of these circuits are considered to be converters.

    A transformer that has one of its windings connected to one of these converter circuits, as a dedicated transformer, is a rectifier transformer or converter transformer.

     

    Rectifier Transformers
    Siemens Made Rectifier Transformers

    The figure shown is a Siemens made rectifier transformer used in an aluminium plant.

    Some other special industrial purpose transformers are Electric arc furnace transformers (EAF),  DC electric arc furnace transformers (DC EAF), Converter Transformers, Line Feeders.

    Read: Substation Equipment and their working

    Where Rectifier Transformers are Used?

    Rectifier transformers are used for industrial processes which require a significant direct current (dc) supply. Rectifier circuits are used to provide high-current dc for electrochemical processes like chlorine production as well as copper and aluminum production. 

    Today, there are numerous applications that require transformers to supply rectifiers with ever-increasing levels of power.

    The classic example is provided by those industries that use electrolysis processes for the production of aluminum, and the high secondary currents, together with the harmonic currents generated by the rectification systems, must be taken into account fully when designing transformers to power such loads.

    Another typical use of rectifiers is in electric traction systems in railways and subways.

    They are also used in variable-speed-drive motor controls, transit traction applications, mining applications, electric furnace applications, higher-voltage laboratory-type experiments, high-voltage direct-current power transmission (HVDC), static precipitators, and others. 

    Operation of Rectifier Transformers

    Two types of rectifiers are available: thyristor rectifiers and diode rectifiers.

    In both cases, the transformers that power them must supply a gradually adjustable secondary voltage, which is normally produced via on-load tap changers (OLTC).

    In cases in which the range of secondary voltages is high, the variation is produced through a regulation transformer, which can be located in a separate tank or in the same tank as the main transformer.

    Rectifier transformers can be liquid-immersed, dry-type, or cast-coil technology.

    Dry type transformers were primarily used in distribution-voltage classes.

    Dry type and cast coil — are limited by voltage and kVA size. However, liquid-immersed transformers can be built to all voltage levels and current levels. High-fire-point fluids can be used for fire-protection considerations.

    Voltage regulation is achieved with no-load or on-load tap changers on the high voltage side. Fine levels of voltage regulation can be achieved using saturable reactors on the secondary side. Regulation units may be built in or separate.

    Related Articles

    • Differences between Power Transformer and Distribution Transformer
      Working Principle of Transformer

      A transformer is a static piece of equipment used either for raising or lowering the…

    • Current 2BTransformer 2BConstruction 2Bor 2BCircuit 2BDiagram 2Band 2BSymbol
      Current Transformer (CT) - Construction and Working Principle

      A current transformer (CT) is a type of transformer that is used to measure AC…

    • working principle of alternator
      Working Principle of Alternator

      The machine which produces 3 phase power from mechanical power is called an alternator or…

    • Construction of High Voltage Current Transformer
      Basic Types of Current Transformers

      Current Transformers (CT’s) are instrument transformers that are used to supply a reduced value of…

    • Why 2BCT 2Bsecondary 2Bshould 2Bnot 2Bopen
      Why Current Transformer (CT) Seconday Should not be Open ?

      Amazed why secondary of current transformer should not be open? If it is left open…

    • DC Motor working 1
      Working Principle of DC Motor

      A DC motor is an electrical machine that converts electrical energy into mechanical energy. DC motor working…

    • Share:
    author avatar
    Electrical Engineer

    Previous post

    Series and Parallel Circuits - A Water Analogy
    November 25, 2015

    Next post

    IEC 61850 - Substation Automation - Fundamentals
    December 7, 2015

    You may also like

    Transformer testing at factory
    Percentage Reactance in Power System (Transformer, Generator or Reactor)
    16 January, 2023
    transformer-winding
    Transformer Windings: Types and Design
    22 November, 2022
    Load Curve and Load Duration Curve
    Load Duration Curve in Power Station
    29 September, 2022

    Leave A Reply Cancel reply

    Your email address will not be published. Required fields are marked *

    Search Here

    From Blog

    Electric motor maintenance
    Electric Motor Maintenance : Preventive, Predictive and Reactive Maintenance
    12Sep2014
    cheerful coworkers in office during company 2LW3KS7
    Buy Cheap Essay: What Do Custom Sites Do for Students?
    26Sep2022
    cheerful coworkers in office during company 2LW3KS7
    Lightning Arrester – Location, Rating and Selection
    23Jun2014
    Electrical Engineering
    Why Three Phase System Preferred Over Higher Phases?
    13Apr2014

    Categories

    • Alternator
    • Arduino
    • Basic Electrical
    • Battery
    • Books
    • Cables
    • Capacitor
    • Career
    • Circuit Breaker
    • Control System
    • DC Generator
    • DC Generator MCQ
    • DC Generator Solved Problems
    • DC Motor
    • DC Motor MCQ
    • Drives
    • Electric Vehicles
    • Electrical Circuits
    • Electrical Machines
    • Electrical Relays
    • Electrical Safety
    • Electronics
    • Embedded System
    • Exams
    • Generation
    • Guest Post
    • HVDC
    • Instrumentation
    • Interview Questions
    • Locomotives
    • MCQ
    • Measurement
    • Microcontroller
    • Objective Questions
    • PCB
    • PLC
    • Power System
    • Problems and Solution
    • Projects
    • Resistor
    • Signals and Systems
    • Single Phase Motors
    • Substation
    • Switchgear
    • Synchronous Motor
    • Three Phase Induction Motor
    • Transformer
    • Transmission Line
    • Uncategorized

    Copyright © 2021 Study Electrical, Inc.

    © StudyElectrical.Com 2021

    Login with your site account

    Lost your password?